/**
 * +Quechua App Styles
 * Copyright (c) 2025 Silvio Miranda. Todos los derechos reservados.
 * 
 * Este diseño y código CSS están protegidos por leyes de propiedad intelectual.
 * Prohibida su copia, modificación o distribución sin autorización expresa.
 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    font-size: 16px;
    font-family: "Open Sans", Arial, sans-serif;
    --col-text: rgb(49, 48, 51);
    --col-focus: rgb(0, 159, 187);
    --col-bg: #fffcf3;
    --col-card-bg: #ffffff;
    /* Added for card backgrounds */
    --col-input-text: rgb(41, 55, 73);
    --col-input-border: rgb(188, 194, 207);
    --col-input-bg: rgb(231, 234, 240);
    --col-button-text: rgb(41, 55, 73);
    --col-button-border: rgb(188, 194, 207);
    --col-button-bg: #fffcf3;
    --col-text-faint: rgb(142, 148, 160);
    --col-sep: rgb(217, 222, 232);
    --col-inset-bg: rgb(231, 234, 240);
    --col-correct-text: rgb(1, 65, 53);
    --col-correct-border: rgb(0, 167, 120);
    --col-correct-bg: rgb(93, 231, 192);
    --col-close-text: rgb(141, 64, 33);
    --col-close-border: rgb(237, 107, 53);
    --col-close-bg: rgb(255, 213, 195);
    --col-wrong-text: rgb(109, 0, 9);
    --col-wrong-border: rgb(177, 48, 57);
    --col-wrong-bg: rgb(255, 191, 188);
    --col-spell-missed: #d4e8bc;
    --col-spell-bad: #f8d3d6;
    --col-spell-good: #ffffff00;
    --col-pressed-outline: #dbd2bdaa;

    /* Variables para gradientes y colores especiales (modo claro) */
    --col-success-gradient: linear-gradient(135deg, rgba(34, 197, 94, 0.95) 0%, rgba(22, 163, 74, 0.95) 100%);
    --col-purple-gradient: linear-gradient(135deg, rgba(124, 58, 237, 0.9) 0%, rgba(168, 85, 247, 0.9) 100%);
    --col-green-gradient: linear-gradient(135deg, rgba(5, 150, 105, 0.9) 0%, rgba(16, 185, 129, 0.9) 100%);
    --col-orange-gradient: linear-gradient(135deg, rgba(245, 158, 11, 0.9) 0%, rgba(251, 191, 36, 0.9) 100%);
    --col-orange-text: rgb(245, 158, 11);
    --col-success-text: rgb(34, 197, 94);
    --col-error-text: rgb(239, 68, 68);
    --border-width: 2px;
    --border-r1: 0.25rem;
    --border-r2: 0.5rem;
    --border-r3: 0.75rem;
    --border-r4: 1rem;
    --elevation-idle: 4px;
    --elevation-hover: 6px;
    --elevation-pressed: 2px;
    --path-hint: path("M6.113 4.508c-.324-.892-.606-1.643-1.648-2.014.865-.54 1.18-1.296 1.448-1.937.083-.2.162-.39.252-.557.064.147.125.31.188.479.26.698.563 1.51 1.333 1.775-.863.658-1.24 1.315-1.573 2.254Zm2.37 2.702c.492.478 1.005.936 1.537 1.37.694-.851 2.16-2.522 2.16-2.522s-1.08-.948-1.676-1.34c-.216.171-2.129 2.387-2.021 2.492Zm2.1-3.379c.643.22 1.187.638 1.688 1.105.209.194.41.397.609.598.35.353.04.95-.23 1.322-.367.505-5.307 6.553-7.8 9.606l-1.144 1.4c-.198.243-.47.127-.715-.058l-1.618-1.225a1.407 1.407 0 0 0-.21-.13c-.102-.055-.168-.09-.275-.274-.165-.283-.204-.624.006-.868.22-.257 1.05-1.326 2.128-2.717 2.645-3.41 6.79-8.754 7.154-8.817a.835.835 0 0 1 .407.058ZM4.636 4.868c-.063.118-.116.26-.17.408-.128.343-.267.717-.576.893.442.312.63.734.8 1.212.112-.525.347-1.041.77-1.276-.378-.137-.53-.526-.667-.877-.051-.13-.1-.254-.157-.36Zm-2.1-.478c-.055.148-.108.29-.171.408-.057-.105-.106-.23-.157-.36-.137-.351-.29-.74-.667-.877.423-.234.658-.751.769-1.276.17.478.359.9.8 1.212-.308.176-.447.55-.574.893Z");

    /* Premium UI Variables */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-shadow: 0 10px 40px -10px rgba(0, 80, 100, 0.1);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --card-hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --backdrop-blur: 12px;

    /* Background Gradient (Light Mode) */
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(100, 200, 255, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(124, 58, 237, 0.05) 0px, transparent 50%);

    /* Default Gradients (Blue Theme) */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, var(--col-focus), #7c3aed);
}

/* Theme: Green (Esmeralda) */
[data-color-scheme="green"] {
    --col-focus: #10b981;
    --col-bg: #f0fdf4;
    --col-inset-bg: #dcfce7;
    --col-correct-border: #059669;
    --col-correct-bg: #d1fae5;
    --primary-gradient: linear-gradient(135deg, #10b981 0%, #059669 50%, #065f46 100%);
    --secondary-gradient: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    --bg-gradient: 
        radial-gradient(at 0% 0%, rgba(16, 185, 129, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(52, 211, 153, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(5, 150, 105, 0.05) 0px, transparent 50%);
}

/* Theme: Pink (Sakura) */
[data-color-scheme="pink"] {
    --col-focus: #ec4899;
    --col-bg: #fff1f2;
    --col-inset-bg: #ffe4e6;
    --col-correct-border: #db2777;
    --col-correct-bg: #fce7f3;
    --primary-gradient: linear-gradient(135deg, #ec4899 0%, #db2777 50%, #9d174d 100%);
    --secondary-gradient: linear-gradient(135deg, #f472b6 0%, #ec4899 100%);
    --bg-gradient: 
        radial-gradient(at 0% 0%, rgba(236, 72, 153, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(244, 114, 182, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(219, 39, 119, 0.05) 0px, transparent 50%);
}

/* Theme: Purple (Amatista) */
[data-color-scheme="purple"] {
    --col-focus: #8b5cf6;
    --col-bg: #f5f3ff;
    --col-inset-bg: #ede9fe;
    --col-correct-border: #7c3aed;
    --col-correct-bg: #ede9fe;
    --primary-gradient: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 50%, #5b21b6 100%);
    --secondary-gradient: linear-gradient(135deg, #a78bfa 0%, #8b5cf6 100%);
    --bg-gradient: 
        radial-gradient(at 0% 0%, rgba(139, 92, 246, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(167, 139, 250, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(124, 58, 237, 0.05) 0px, transparent 50%);
}

/* Blue Theme - Elegant Ocean Blue */

/* Theme: Blue (Zafiro) */
[data-color-scheme="blue"] {
    --col-focus: #3b82f6;
    --col-bg: #f0f9ff;
    --col-inset-bg: #e0f2fe;
    --col-correct-border: #2563eb;
    --col-correct-bg: #dbeafe;
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 50%, #1e40af 100%);
    --secondary-gradient: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    --bg-gradient: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(96, 165, 250, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(37, 99, 235, 0.05) 0px, transparent 50%);
}



/* Animaciones Premium */
@keyframes fadeScaleIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-enter {
    animation: fadeScaleIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.stagger-1 {
    animation-delay: 50ms;
}

.stagger-2 {
    animation-delay: 100ms;
}

.stagger-3 {
    animation-delay: 150ms;
}

.stagger-4 {
    animation-delay: 200ms;
}

body {
    background-color: var(--col-bg);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--col-text);
    min-height: 100vh;
    width: 100vw;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    font-family: 'Open Sans', system-ui, -apple-system, sans-serif;
}

#contenido {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    min-height: 0;
    padding-bottom: 2rem;
}

/* Estilos de pestañas eliminados - ya no se usan */

.seccion {
    max-width: 60rem;
    margin: auto;
    height: 100%;
}

#gramatica,
#diccionario {
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    padding-top: 5rem;
    /* Padding para el botón volver fijo */
}

#tarjetas {
    display: flex;
    flex-flow: column;
    justify-content: flex-start;
    padding-top: 1.5rem;
    padding-bottom: 0;
    transition: opacity 0.3s ease;
    height: 100%;
    overflow-y: hidden;
    overflow-x: hidden;
    max-height: 100%;
    box-sizing: border-box;
}

#tarjetas #anverso,
#tarjetas #reverso {
    overflow-y: hidden;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    padding-bottom: 0.5rem;
    box-sizing: border-box;
    justify-content: space-between;
}

/* Menú Principal y Menú de Actividades */
#menu-principal {
    padding: 5rem 1rem 2rem 1rem;
    /* Más padding arriba para los elementos fijos */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
}

#menu-actividades {
    padding: 5rem 1rem 2rem 1rem;
    /* Más padding arriba para el botón volver fijo */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100%;
}

/* Header del menú principal */
.menu-principal-header {
    position: relative;
    height: 0;
    margin: 0;
    padding: 0;
    overflow: visible;
    /* Permitir que los elementos fijos se vean */
}

.menu-logo {
    position: fixed;
    top: 2rem;
    left: 1rem;
    z-index: 1000;
    display: flex !important;
    align-items: center;
    visibility: visible !important;
}

.menu-logo-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.menu-logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    color: white;
}

.ajustes-btn {
    position: fixed;
    top: 2rem;
    right: 1rem;
    z-index: 1000;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--col-focus) 0%, rgba(0, 159, 187, 0.8) 100%);
    /* Note: Kept specific for now, or could use --secondary-gradient */
    border: 2px solid var(--col-button-border);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 159, 187, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.ajustes-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 159, 187, 0.5);
}

.ajustes-btn:active {
    transform: scale(0.95);
}

.ajustes-icon {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    line-height: 1;
}

.contacto-btn {
    position: fixed;
    top: 2rem;
    right: 7rem;
    z-index: 1000;
    display: flex !important;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--col-button-bg);
    border: var(--border-width) solid var(--col-button-border);
    border-radius: var(--border-r3);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--col-text);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--col-button-border) 0 2px 0;
    visibility: visible !important;
}

.contacto-btn:active {
    transform: translateY(2px);
    box-shadow: var(--col-button-border) 0 0 0;
}

.contacto-icon {
    font-size: 1.25rem;
}

.contacto-texto {
    font-size: 0.875rem;
}

.actividades-container {
    width: 100%;
    max-width: 48rem;
    margin: 0 auto;
    padding: 1rem;
}

.actividades-container h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--col-text);
    margin-bottom: 1.5rem;
    text-align: center;
    background: var(--secondary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.actividades-grid {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 0;
}

.actividad-btn {
    background: var(--col-card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    /* More subtle border for dark mode compatibility */
    border-radius: 1.5rem;
    /* Rounder is friendlier */
    padding: 1.25rem 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    /* Bouncy spring */
    box-shadow: var(--card-shadow), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* Center content vertically too */
    text-align: center;
    min-height: 160px;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.actividad-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 159, 187, 0.08), rgba(124, 58, 237, 0.08));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.actividad-btn:hover {
    background: var(--col-card-bg);
    transform: translateY(-8px) scale(1.02);
    box-shadow:
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04),
        0 0 0 2px var(--col-focus);
    border-color: transparent;
}

.actividad-btn:active {
    transform: translateY(-1px) scale(1);
    box-shadow: var(--col-button-border) 0 2px 0;
}

.actividad-btn.actividad-bloqueada {
    opacity: 0.6;
    cursor: not-allowed;
    position: relative;
}

.actividad-btn.actividad-bloqueada>* {
    position: relative;
    z-index: 2;
}

.actividad-btn.actividad-bloqueada::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    border-radius: var(--border-r3);
    z-index: 1;
}

.actividad-btn.actividad-bloqueada:hover {
    transform: none;
    box-shadow: var(--col-button-border) 0 3px 0;
    border-color: var(--col-button-border);
    background: var(--col-button-bg);
}

.actividad-btn.actividad-bloqueada:hover::before {
    opacity: 0;
}

.actividad-btn.actividad-bloqueada .actividad-icon {
    filter: grayscale(50%) drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.actividad-btn.actividad-bloqueada:hover .actividad-icon {
    transform: none;
}

.actividad-btn.actividad-bloqueada .actividad-descripcion {
    color: var(--col-text-faint);
    font-style: italic;
}

.actividad-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s ease;
}

.actividad-btn:hover .actividad-icon {
    transform: scale(1.1) rotate(5deg);
}

.actividad-titulo {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--col-text);
    margin-bottom: 0.4rem;
    position: relative;
    z-index: 1;
    line-height: 1.3;
}

.actividad-descripcion {
    font-size: 0.8rem;
    color: var(--col-text-faint);
    line-height: 1.4;
    position: relative;
    z-index: 1;
    padding: 0 0.5rem;
}

/* Responsive: en pantallas muy pequeñas, volver a una columna */
@media (max-width: 480px) {
    .actividades-grid {
        grid-template-columns: 1fr;
        gap: 0.875rem;
    }

    .actividad-btn {
        min-height: 140px;
        padding: 1rem 0.875rem;
    }

    .actividad-icon {
        font-size: 2.25rem;
        margin-bottom: 0.625rem;
    }

    .actividad-titulo {
        font-size: 1.05rem;
    }

    .actividad-descripcion {
        font-size: 0.75rem;
    }
}

/* Para pantallas más grandes, mantener dos columnas pero con más espacio */
@media (min-width: 768px) {
    .actividades-grid {
        gap: 1.25rem;
    }

    .actividad-btn {
        min-height: 170px;
        padding: 1.5rem 1.25rem;
    }

    .actividad-icon {
        font-size: 2.75rem;
    }

    .actividad-titulo {
        font-size: 1.25rem;
    }

    .actividad-descripcion {
        font-size: 0.85rem;
    }
}

/* Efecto de confeti para festejo (más fluido y suave) */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes confetiFall {
    0% {
        transform: translateY(0) translateX(0) rotate(0deg);
        opacity: 0.9;
    }

    50% {
        opacity: 0.8;
    }

    100% {
        transform: translateY(calc(100vh + 100px)) translateX(calc(var(--drift-x, 0) * 1px)) rotate(720deg);
        opacity: 0;
    }
}

.confeti-piece {
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
    will-change: transform, opacity;
}

/* Efecto visual al equivocarse (más notorio) */
@keyframes errorExpand {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 1;
    }

    30% {
        opacity: 1;
    }

    70% {
        opacity: 0.8;
    }

    100% {
        transform: translate(calc(-50% + var(--final-x, 0)), calc(-50% + var(--final-y, 0))) scale(1.2);
        opacity: 0;
    }
}

.error-particle {
    will-change: transform, opacity;
    filter: brightness(1.2);
}

/* Pantalla de bienvenida */
#pantalla-bienvenida {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--col-bg);
    position: relative;
    overflow: hidden;
}

.bienvenida-container {
    text-align: center;
    z-index: 10;
    position: relative;
}

.bienvenida-logo {
    margin-bottom: 2rem;
    animation: logoEntrada 1s ease-out;
}

.logo-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
    animation: logoPulse 2s ease-in-out infinite;
}

.logo-text {
    font-size: 4rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.bienvenida-titulo {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    animation: tituloEntrada 1s ease-out 0.3s both;
    letter-spacing: 2px;
}

.bienvenida-subtitulo {
    font-size: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 300;
    margin-bottom: 2rem;
    animation: subtituloEntrada 1s ease-out 0.6s both;
    letter-spacing: 1px;
}

.bienvenida-decoracion {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    animation: decoracionEntrada 1s ease-out 0.9s both;
}

.decoracion-linea {
    width: 60px;
    height: 2px;
    background: var(--primary-gradient);
    border-radius: 2px;
    opacity: 0.6;
}

.decoracion-punto {
    width: 12px;
    height: 12px;
    background: var(--primary-gradient);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
    animation: puntoPulse 2s ease-in-out infinite;
}

/* Animaciones de bienvenida */
@keyframes logoEntrada {
    0% {
        transform: scale(0) rotate(-180deg);
        opacity: 0;
    }

    60% {
        transform: scale(1.1) rotate(10deg);
    }

    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

@keyframes logoPulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

@keyframes tituloEntrada {
    0% {
        transform: translateY(30px);
        opacity: 0;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes subtituloEntrada {
    0% {
        transform: translateY(20px);
        opacity: 0;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes decoracionEntrada {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes puntoPulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.3);
        opacity: 0.8;
    }
}

/* Partículas de fondo para la bienvenida */
#pantalla-bienvenida::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(102, 126, 234, 0.05) 0%, transparent 50%);
    animation: fondoAnimado 10s ease-in-out infinite;
}

@keyframes fondoAnimado {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(-20px, -20px);
    }
}

/* Responsive para bienvenida */
@media (max-width: 768px) {
    .bienvenida-titulo {
        font-size: 2rem;
    }

    .bienvenida-subtitulo {
        font-size: 1.2rem;
    }

    .logo-circle {
        width: 100px;
        height: 100px;
    }

    .logo-text {
        font-size: 3rem;
    }
}

/* Pantalla de configuración para Escribe */
.configuracion-container {
    max-width: 40rem;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.configuracion-titulo {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    color: var(--col-text);
    margin-bottom: 0.5rem;
}

.configuracion-descripcion {
    font-size: 1rem;
    text-align: center;
    color: var(--col-text-faint);
    margin-bottom: 2.5rem;
}

.configuracion-categoria {
    margin-bottom: 2.5rem;
}

.configuracion-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--col-text);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.configuracion-categorias-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.configuracion-categoria-btn {
    padding: 0.75rem 1.25rem;
    background: var(--col-inset-bg);
    border: var(--border-width) solid var(--col-button-border);
    border-radius: var(--border-r2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--col-text);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--col-button-border) 0 2px 0;
}

.configuracion-categoria-btn:active {
    transform: translateY(2px);
    box-shadow: var(--col-button-border) 0 0 0;
}

.configuracion-categoria-btn.categoria-seleccionada {
    background: var(--col-correct-bg);
    border-color: var(--col-correct-border);
    color: var(--col-correct-text);
    box-shadow: var(--col-correct-border) 0 2px 0;
}

/* Colores para categorías en configuración */
.configuracion-categoria-btn.categoria-pronombres.categoria-seleccionada {
    background: #b8860b;
    border-color: #8b6914;
    color: white;
    box-shadow: #8b6914 0 2px 0;
}

.configuracion-categoria-btn.categoria-verbos.categoria-seleccionada {
    background: #22c55e;
    border-color: #16a34a;
    color: white;
    box-shadow: #16a34a 0 2px 0;
}

.configuracion-categoria-btn.categoria-adjetivos.categoria-seleccionada {
    background: #3b82f6;
    border-color: #2563eb;
    color: white;
    box-shadow: #2563eb 0 2px 0;
}

.configuracion-categoria-btn.categoria-adverbio.categoria-seleccionada {
    background: #f97316;
    border-color: #ea580c;
    color: white;
    box-shadow: #ea580c 0 2px 0;
}

.configuracion-categoria-btn.categoria-teocratico.categoria-seleccionada {
    background: #a855f7;
    border-color: #9333ea;
    color: white;
    box-shadow: #9333ea 0 2px 0;
}

.configuracion-categoria-btn.categoria-sufijos.categoria-seleccionada {
    background: #ec4899;
    border-color: #db2777;
    color: white;
    box-shadow: #db2777 0 2px 0;
}

.configuracion-categoria-btn.categoria-sustantivos.categoria-seleccionada {
    background: #ef4444;
    border-color: #dc2626;
    color: white;
    box-shadow: #dc2626 0 2px 0;
}

.configuracion-btn-iniciar {
    width: 100%;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: var(--border-r4);
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.configuracion-btn-iniciar:active {
    transform: translateY(4px);
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.3);
}

.btn-iniciar-icon {
    font-size: 1.5rem;
}

.btn-iniciar-texto {
    font-size: 1.25rem;
}

.configuracion-btn-repasos {
    width: 100%;
    padding: 1.25rem 2rem;
    background: var(--col-button-bg);
    border: var(--border-width) solid var(--col-button-border);
    border-radius: var(--border-r4);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--col-text);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--col-button-border) 0 4px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

.configuracion-btn-repasos:active {
    transform: translateY(4px);
    box-shadow: var(--col-button-border) 0 0 0;
}

.btn-repasos-icon {
    font-size: 1.25rem;
}

.btn-repasos-texto {
    font-size: 1.125rem;
}

/* Pantalla de conteo */
#conteo-pantalla {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--col-bg);
    position: relative;
    overflow: hidden;
}

.conteo-container {
    text-align: center;
    z-index: 10;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 2rem;
}

.conteo-numero {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    user-select: none;
    text-align: center;
    margin: 0;
    display: block;
}

.conteo-animacion {
    animation: conteoPop 0.5s ease-out;
}

.conteo-animacion-final {
    animation: conteoFinal 0.8s ease-out;
}

@keyframes conteoPop {
    0% {
        transform: scale(0.3) rotate(-180deg);
        opacity: 0;
    }

    50% {
        transform: scale(1.2) rotate(10deg);
    }

    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

@keyframes conteoFinal {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.3);
        opacity: 0.9;
    }

    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* Efecto de fondo para conteo */
#conteo-pantalla::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 30% 40%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
    animation: fondoAnimadoConteo 3s ease-in-out infinite;
}

@keyframes fondoAnimadoConteo {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    50% {
        transform: translate(-30px, -30px) scale(1.1);
    }
}

/* Responsive para configuración */
@media (max-width: 768px) {
    .configuracion-titulo {
        font-size: 2rem;
    }

    .conteo-numero {
        font-size: 3rem;
    }

    .configuracion-btn-repasos {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }

    .configuracion-btn-iniciar {
        padding: 1.25rem 1.5rem;
        font-size: 1.125rem;
    }
}

.overhead {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.mem-instruction {
    color: var(--col-text-faint);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.front-extra {
    display: flex;
    justify-content: flex-start;
    padding: 1rem;
    font-size: 1rem;
    background-color: var(--col-inset-bg);
    color: var(--col-text);
    border-radius: var(--border-r4);
}

.front-extra label {
    font-weight: 700;
    text-transform: uppercase;
    padding-right: 0.5rem;
}

.mem-question {
    display: flex;
    align-items: center;
    flex-direction: column;
    font-size: 2.25rem;
    font-weight: bold;
    margin: 0.83em 0 1rem;
    flex-shrink: 0;
}

#etiqueta-container {
    margin-bottom: 0.75rem;
}

.etiqueta-badge {
    display: inline-block;
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-r2);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Colores específicos para cada tipo de etiqueta */
.etiqueta-pronombres {
    background-color: #B8860B;
    /* Amarillo oscuro/dorado/mostaza */
}

.etiqueta-verbos {
    background-color: #228B22;
    /* Verde */
}

.etiqueta-adjetivos {
    background-color: #4169E1;
    /* Azul */
}

.etiqueta-adverbio,
.etiqueta-conector {
    background-color: #FF8C00;
    /* Naranja */
}

.etiqueta-teocratico {
    background-color: #9370DB;
    /* Morado */
}

.etiqueta-sufijos {
    background-color: #C71585;
    /* Rosa oscuro */
}

.etiqueta-sustantivos {
    background-color: #DC143C;
    /* Rojo */
}

.mem-typing {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.mem-typing label {
    text-transform: uppercase;
    align-self: flex-start;
    margin: 0.5rem 0 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

#typeans {
    font-size: 1.5rem;
    height: 4rem;
    padding: 0 1rem;
    width: 100%;
    max-width: 300px;
    margin: 0 auto 1.5rem;
    border-radius: var(--border-r3);
    color: var(--col-input-text);
    border: var(--border-width) solid var(--col-input-border);
    background-color: var(--col-input-bg);
}

.correct #typeans {
    --col-input-text: var(--col-correct-text);
    --col-input-border: var(--col-correct-border);
    --col-input-bg: var(--col-correct-bg);
}

.soclose #typeans {
    --col-input-text: var(--col-close-text);
    --col-input-border: var(--col-close-border);
    --col-input-bg: var(--col-close-bg);
}

.wrong #typeans {
    --col-input-text: var(--col-wrong-text);
    --col-input-border: var(--col-wrong-border);
    --col-input-bg: var(--col-wrong-bg);
}

#scr-keyboard {
    display: flex;
    width: 95%;
    margin: 0 auto 1rem;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    color: var(--col-input-text);
    flex-shrink: 0;
}

#scr-keyboard>* {
    margin: 0;
}

.key-btn {
    min-width: 2rem;
    height: 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    line-height: calc(2.5rem - 2 * var(--border-width));
    text-align: center;
    vertical-align: baseline;
    cursor: pointer;
    border: var(--border-width) solid var(--col-button-border);
    background: var(--col-button-bg);
    color: var(--col-button-text);
    border-radius: var(--border-r2);
    box-shadow: var(--col-button-border) 0 var(--elevation-idle) 0;
    transform: translateY(calc(4px - var(--elevation-idle)));
    transition: all 0.1s ease;
    user-select: none;
}

.key-btn:hover {
    --elevation: var(--elevation-hover);
    background: var(--col-inset-bg);
}

.key-btn:active {
    --elevation: var(--elevation-pressed);
    transform: translateY(calc(2px - var(--elevation-pressed)));
    background: var(--col-button-border);
}

.key-space {
    flex: 1;
    min-width: 6rem;
    font-size: 0.875rem;
}

.key-delete,
.key-enter {
    min-width: 3rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.hint-btn {
    font-size: 0.875rem;
    font-weight: 700;
    width: max-content;
    padding: 0.5rem 1rem;
    height: 2.5rem;
    cursor: pointer;
    border: var(--border-width) solid var(--col-button-border);
    background: var(--col-button-bg);
    color: var(--col-button-text);
    border-radius: var(--border-r3);
    box-shadow: var(--col-button-border) 0 var(--elevation-idle) 0;
    transform: translateY(calc(4px - var(--elevation-idle)));
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.1s ease;
}

.hint-btn:hover {
    --elevation: var(--elevation-hover);
    background: var(--col-inset-bg);
}

.hint-btn:active {
    --elevation: var(--elevation-pressed);
    transform: translateY(calc(2px - var(--elevation-pressed)));
}

.hint-btn svg {
    height: 1em;
    width: 1em;
    vertical-align: baseline;
    margin-right: 0.5rem;
    margin-top: -0.5rem;
}

.hint-btn svg path {
    fill: currentcolor;
    d: var(--path-hint);
}

.verify-button-container {
    display: flex;
    justify-content: center;
    margin: 0.5rem 0;
    margin-top: 1rem;
    padding: 0 1rem;
    padding-bottom: 0.5rem;
    flex-shrink: 0;
    width: 100%;
    box-sizing: border-box;
}

.verify-btn {
    font-size: 1rem;
    font-weight: 700;
    padding: 0.75rem 2rem;
    min-width: 150px;
    width: auto;
    cursor: pointer;
    border: var(--border-width) solid var(--col-button-border);
    background: var(--col-button-bg);
    color: var(--col-button-text);
    border-radius: var(--border-r3);
    box-shadow: var(--col-button-border) 0 var(--elevation-idle) 0;
    transform: translateY(calc(4px - var(--elevation-idle)));
    transition: all 0.15s ease;
    box-sizing: border-box;
    overflow: visible;
}

.verify-btn:hover {
    background: var(--col-inset-bg);
    box-shadow: var(--col-button-border) 0 var(--elevation-hover) 0;
    transform: translateY(calc(2px - var(--elevation-hover)));
}

.verify-btn:active {
    background: var(--col-button-border);
    box-shadow: var(--col-button-border) 0 var(--elevation-pressed) 0;
    transform: translateY(calc(6px - var(--elevation-pressed)));
}

.mem-alert {
    padding: 0.5rem 1rem;
    font-size: 1.5rem;
    font-weight: 600;
    border-radius: var(--border-r2);
    color: var(--col-wrong-border);
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
}

.mem-alert:empty {
    display: none;
}

.mem-alert::before {
    content: 'Has respondido';
    display: block;
    margin: 0 0 0.25rem;
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
}

.mem-alert::after {
    content: '';
    inset: 0;
    background: var(--col-wrong-bg);
    position: absolute;
    z-index: -1;
    opacity: 0.5;
}

.correct .mem-alert {
    color: var(--col-correct-border);
}

.correct .mem-alert::after {
    background: var(--col-correct-bg);
}

.soclose .mem-alert {
    color: var(--col-close-border);
}

.soclose .mem-alert::after {
    background: var(--col-close-bg);
}

.mem-field {
    margin-bottom: 1rem;
}

.mem-field label {
    display: block;
    margin: 0.5rem 0;
    color: var(--col-text-faint);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.mem-field h2 {
    font-size: 2.25rem;
    font-weight: 600;
    line-height: 1.2;
}

.mem-field h3 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.2;
}

.mem-field h4 {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
}

.sep {
    background: var(--col-sep);
    height: var(--border-width);
    width: 100%;
    margin-bottom: 1rem;
}

#spellcheck {
    font-size: 14px;
}

#spellcheck .typeGood {
    background: var(--col-spell-good);
}

#spellcheck .typeMissed {
    background: var(--col-spell-missed);
}

#spellcheck .typeBad {
    background: var(--col-spell-bad);
    text-decoration: line-through;
}

.replay-button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    border: var(--border-width) solid var(--col-button-border);
    background: var(--col-button-bg);
    color: var(--col-button-text);
    border-radius: var(--border-r4);
}

.replay-button.active {
    background: var(--col-correct-bg);
    color: var(--col-correct-text);
}

.replay-button.pulse {
    animation: pulse 0.5s;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

.rating-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.rating-buttons button {
    flex: 1;
    padding: 1rem 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-r3);
    border: var(--border-width) solid;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    line-height: 1.3;
}

.intervalo-texto {
    font-size: 0.7rem;
    font-weight: 400;
    opacity: 0.8;
    margin-top: 0.25rem;
}

.rating-btn.rating-olvidado {
    background: #ffebee;
    color: #c62828;
    border-color: #e57373;
}

.rating-btn.rating-olvidado:hover {
    background: #ffcdd2;
    box-shadow: 0 4px 8px rgba(198, 40, 40, 0.2);
}

.rating-btn.rating-olvidado:active {
    background: #ef9a9a;
    transform: scale(0.98);
}

.rating-btn.rating-recordado {
    background: #e8f5e9;
    color: #2e7d32;
    border-color: #66bb6a;
}

.rating-btn.rating-recordado:hover {
    background: #c8e6c9;
    box-shadow: 0 4px 8px rgba(46, 125, 50, 0.2);
}

.rating-btn.rating-recordado:active {
    background: #a5d6a7;
    transform: scale(0.98);
}

.rating-btn.rating-dominado {
    background: #e0f2f1;
    color: #00695c;
    border-color: #4db6ac;
}

.rating-btn.rating-dominado:hover {
    background: #b2dfdb;
    box-shadow: 0 4px 8px rgba(0, 105, 92, 0.2);
}

.rating-btn.rating-dominado:active {
    background: #80cbc4;
    transform: scale(0.98);
}

/* Gramática */
#gramatica h2 {
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

@media (min-width: 480px) {
    #gramatica h2 {
        font-size: 1.625rem;
        margin-bottom: 1.5rem;
    }
}

@media (min-width: 768px) {
    #gramatica h2 {
        font-size: 1.75rem;
    }
}

/* Estilos para botones de categorías de lecciones */
.categoria-btn {
    transition: all 0.3s ease;
}

.categoria-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
}

.categoria-btn:active {
    transform: translateY(0);
}

.categoria-btn.categoria-activa:hover {
    box-shadow: 0 4px 16px rgba(0, 159, 187, 0.4) !important;
}

.articulos-lista {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.articulo-card {
    padding: 1rem;
    background: var(--col-button-bg);
    border: var(--border-width) solid var(--col-button-border);
    border-radius: var(--border-r2);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
}

@media (min-width: 480px) {
    .articulo-card {
        padding: 1.25rem;
        border-radius: var(--border-r3);
    }
}

.articulo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    transform: scaleY(0);
    transition: transform 0.3s ease;
    transform-origin: bottom;
}

.articulo-card:hover {
    background: var(--col-inset-bg);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.15);
    border-color: var(--col-focus);
}

.articulo-card:hover::before {
    transform: scaleY(1);
}

.articulo-card:active {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.2);
}

.articulo-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--col-text);
}

.articulo-preview {
    font-size: 0.85rem;
    color: var(--col-text-faint);
    line-height: 1.4;
}

@media (min-width: 480px) {
    .articulo-card h3 {
        font-size: 1.25rem;
    }

    .articulo-preview {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}

.leccion-contenido {
    padding: 1.25rem;
    background: var(--col-inset-bg);
    border-radius: var(--border-r3);
    line-height: 1.6;
    color: var(--col-text);
    font-size: 0.95rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

@media (min-width: 480px) {
    .leccion-contenido {
        padding: 1.5rem;
        font-size: 1rem;
    }
}

@media (min-width: 768px) {
    .leccion-contenido {
        padding: 2rem;
        font-size: 1.05rem;
        line-height: 1.7;
    }
}

/* Callouts mejorados */
.leccion-callout {
    padding: 1rem;
    border-radius: var(--border-r2);
    margin: 1rem 0;
    border-left: 3px solid;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

@media (min-width: 480px) {
    .leccion-callout {
        padding: 1.25rem;
        gap: 1rem;
        margin: 1.25rem 0;
    }
}

@media (min-width: 768px) {
    .leccion-callout {
        padding: 1.5rem;
        margin: 1.5rem 0;
        border-left-width: 4px;
    }
}

.leccion-callout-tip {
    background: linear-gradient(135deg, #e0f2f1 0%, #b2dfdb 100%);
    border-left-color: #00695c;
}

.leccion-callout-info {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-left-color: #1976d2;
}

.leccion-callout-warning {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    border-left-color: #f57c00;
}

.leccion-callout-note {
    background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
    border-left-color: #616161;
}

.leccion-callout-section {
    background: linear-gradient(135deg, #e8eaf6 0%, #c5cae9 100%);
    border-left-color: #3f51b5;
}

.leccion-ejemplo-bullet {
    font-weight: 700;
    color: var(--col-focus);
    margin-right: 0.5rem;
}

/* Contenedor de fichas */
.leccion-fichas-container {
    margin: 1.25rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.75rem;
}

/* Fichas individuales */
.leccion-ficha {
    background: linear-gradient(135deg, var(--col-button-bg) 0%, var(--col-inset-bg) 100%);
    border: 2px solid var(--col-button-border);
    border-radius: var(--border-r2);
    padding: 0.75rem;
    cursor: default;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 90px;
    justify-content: center;
}

@media (min-width: 480px) {
    .leccion-fichas-container {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 1rem;
        margin: 1.5rem 0;
    }

    .leccion-ficha {
        padding: 1rem;
        min-height: 110px;
        border-radius: var(--border-r3);
    }
}

@media (min-width: 768px) {
    .leccion-fichas-container {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .leccion-ficha {
        min-height: 120px;
    }
}

.leccion-ficha:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.2);
    border-color: var(--col-focus);
}

.leccion-ficha:active {
    transform: translateY(-2px) scale(1);
}

/* Animaciones para overlay */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.leccion-callout-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
    color: var(--col-text);
}

.leccion-callout-content {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--col-text);
}

@media (min-width: 480px) {
    .leccion-callout-title {
        font-size: 1.25rem;
        margin-bottom: 0.75rem;
    }

    .leccion-callout-content {
        font-size: 0.95rem;
        line-height: 1.6;
    }
}

@media (min-width: 768px) {
    .leccion-callout-content {
        font-size: 1rem;
    }
}

/* Ejemplos mejorados */
.leccion-palabra {
    color: var(--col-focus);
}

.leccion-significado {
    color: var(--col-text-faint);
}

.leccion-ejemplo {
    background: var(--col-button-bg);
    padding: 0.75rem 1rem;
    border-radius: var(--border-r2);
    margin: 0.5rem 0;
    border-left: 3px solid var(--col-focus);
    list-style: none;
    margin-left: 0 !important;
}

.leccion-ejemplo-quechua {
    font-weight: 700;
    color: var(--col-focus);
    font-size: 1.1em;
}

.leccion-ejemplo-espanol {
    color: var(--col-text-faint);
    font-style: italic;
}

/* Títulos - preservar jerarquía de Notion */
.leccion-contenido h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 1.25rem 0 0.75rem;
    color: var(--col-text);
    border-bottom: 2px solid var(--col-sep);
    padding-bottom: 0.5rem;
}

.leccion-contenido h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin: 1.5rem 0 0.875rem;
    color: var(--col-text);
    position: relative;
    padding-bottom: 0.625rem;
    border-bottom: 2px solid var(--col-focus);
}

.leccion-contenido h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.25rem 0 0.625rem;
    color: var(--col-text);
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.leccion-contenido h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0.625rem 0 0.5rem;
    color: var(--col-text);
}

.leccion-contenido h5 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0.5rem 0 0.375rem;
    color: var(--col-text);
}

.leccion-contenido h6 {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0.5rem 0 0.375rem;
    color: var(--col-text);
}

@media (min-width: 480px) {
    .leccion-contenido h1 {
        font-size: 1.75rem;
        margin: 1.5rem 0 1rem;
    }

    .leccion-contenido h2 {
        font-size: 1.5rem;
        margin: 1.75rem 0 1rem;
        border-bottom-width: 3px;
    }

    .leccion-contenido h3 {
        font-size: 1.375rem;
        margin: 1.5rem 0 0.75rem;
    }
}

@media (min-width: 768px) {
    .leccion-contenido h1 {
        font-size: 2rem;
        margin: 1.5rem 0 1rem;
    }

    .leccion-contenido h2 {
        font-size: 1.75rem;
        margin: 2rem 0 1rem;
    }

    .leccion-contenido h3 {
        font-size: 1.5rem;
        margin: 1.5rem 0 0.75rem;
    }

    .leccion-contenido h4 {
        font-size: 1.25rem;
    }

    .leccion-contenido h5 {
        font-size: 1.1rem;
    }

    .leccion-contenido h6 {
        font-size: 1rem;
    }
}

/* Párrafos */
.leccion-contenido p {
    margin-bottom: 1.25rem;
    line-height: 1.8;
    color: var(--col-text);
}

.leccion-contenido p:first-of-type {
    font-size: 1.1rem;
    color: var(--col-text);
    font-weight: 500;
}

/* Listas */
.leccion-contenido ul,
.leccion-contenido ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
    padding-left: 0.5rem;
    background: var(--col-button-bg);
    padding: 1rem 1rem 1rem 2rem;
    border-radius: var(--border-r2);
    border: 1px solid var(--col-button-border);
}

.leccion-contenido li {
    margin-bottom: 0.75rem;
    line-height: 1.7;
    padding-left: 0.5rem;
}

.leccion-contenido li:last-child {
    margin-bottom: 0;
}

.leccion-contenido ul li {
    list-style-type: disc;
}

.leccion-contenido ol li {
    list-style-type: decimal;
}

/* Listas anidadas */
.leccion-contenido ul ul,
.leccion-contenido ol ol,
.leccion-contenido ul ol,
.leccion-contenido ol ul {
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
}

/* Texto en negrita y cursiva */
.leccion-contenido strong,
.leccion-contenido b {
    font-weight: 700;
    color: var(--col-text);
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.leccion-contenido em,
.leccion-contenido i {
    font-style: italic;
}

/* Código inline y bloques de código */
.leccion-contenido code {
    background: var(--col-button-bg);
    padding: 0.2rem 0.4rem;
    border-radius: var(--border-r1);
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--col-text);
    border: 1px solid var(--col-button-border);
}

.leccion-contenido pre {
    background: var(--col-button-bg);
    padding: 1rem;
    border-radius: var(--border-r2);
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid var(--col-button-border);
}

.leccion-contenido pre code {
    background: transparent;
    padding: 0;
    border: none;
    display: block;
    white-space: pre;
}

/* Enlaces */
.leccion-contenido a {
    color: var(--col-focus);
    text-decoration: underline;
}

.leccion-contenido a:hover {
    color: var(--col-text);
}

/* Bloques de cita */
.leccion-contenido blockquote {
    border-left: 4px solid var(--col-focus);
    padding-left: 1rem;
    margin: 1rem 0;
    font-style: italic;
    color: var(--col-text-faint);
}

/* Separadores horizontales */
.leccion-contenido hr {
    border: none;
    border-top: 2px solid var(--col-sep);
    margin: 1.5rem 0;
}

/* Tablas */
.leccion-contenido table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.9rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.leccion-contenido th,
.leccion-contenido td {
    padding: 0.75rem;
    border: 1px solid var(--col-button-border);
    text-align: left;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
}

.leccion-contenido th {
    background: var(--col-button-bg);
    font-weight: 600;
}

/* Tablas responsive para móviles */
@media (max-width: 768px) {
    .leccion-contenido {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Para tablas con muchas columnas, permitir scroll horizontal */
    .leccion-contenido table {
        font-size: 0.75rem;
        min-width: max-content;
        display: table;
        border-collapse: collapse;
    }

    .leccion-contenido th,
    .leccion-contenido td {
        padding: 0.5rem 0.4rem;
        font-size: 0.7rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
        hyphens: auto;
        line-height: 1.4;
        max-width: none;
        white-space: normal;
    }

    .leccion-contenido th {
        font-size: 0.7rem;
        font-weight: 600;
        background: var(--col-button-bg);
    }

    /* Asegurar que las celdas no se compriman demasiado */
    .leccion-contenido td {
        min-width: 80px;
    }
}

/* Imágenes */
.leccion-contenido img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-r2);
    margin: 1rem 0;
}

/* Listas de verificación (checkboxes) - estilo Notion */
.leccion-contenido input[type="checkbox"] {
    margin-right: 0.5rem;
    width: 1.1em;
    height: 1.1em;
    cursor: pointer;
}

.back-btn {
    padding: 0.75rem 1.5rem;
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: var(--border-width) solid var(--col-button-border);
    background: var(--col-button-bg);
    color: var(--col-button-text);
    border-radius: var(--border-r3);
    box-shadow: var(--col-button-border) 0 2px 0;
    transition: all 0.15s ease;
}

/* Botón volver fijo en la pantalla de actividades */
#menu-actividades>.back-btn {
    position: fixed;
    top: 2rem;
    left: 1rem;
    z-index: 1000;
    margin: 0 !important;
}

/* Botón volver fijo en la pantalla de diccionario */
#diccionario>.back-btn {
    position: fixed;
    top: 2rem;
    left: 1rem;
    z-index: 1000;
    margin: 0 !important;
}

/* Botón volver fijo en la pantalla de gramática */
#gramatica>.back-btn {
    position: fixed;
    top: 2rem;
    left: 1rem;
    z-index: 1000;
    margin: 0 !important;
}

.back-btn:hover {
    background: var(--col-inset-bg);
    transform: translateY(-1px);
}

.back-btn:active {
    transform: translateY(1px);
    box-shadow: var(--col-button-border) 0 1px 0;
}

/* Diccionario */
#diccionario h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

/* Encabezado del diccionario */
.diccionario-header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 1.25rem 1rem;
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    border-radius: var(--border-r3);
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.25);
    color: white;
}

.diccionario-header-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-8px);
    }
}

.diccionario-titulo {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 0.375rem 0;
    color: white;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.diccionario-subtitulo {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    font-weight: 400;
}

@media (min-width: 480px) {
    .diccionario-header {
        padding: 1.5rem 1rem;
        margin-bottom: 2rem;
    }

    .diccionario-header-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
    }

    .diccionario-titulo {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }

    .diccionario-subtitulo {
        font-size: 1rem;
    }
}

@media (min-width: 768px) {
    .diccionario-header {
        padding: 2rem 1rem;
        border-radius: var(--border-r4);
        box-shadow: 0 8px 24px rgba(124, 58, 237, 0.3);
    }

    .diccionario-header-icon {
        font-size: 4rem;
    }

    .diccionario-titulo {
        font-size: 2.5rem;
    }
}

/* Filtros del diccionario */
.filtros-diccionario {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.filtro-diccionario-selector,
.filtro-busqueda,
.filtro-categoria {
    position: relative;
    display: flex;
    align-items: center;
}

.filtro-icon {
    position: absolute;
    left: 0.75rem;
    font-size: 1.1rem;
    z-index: 1;
    pointer-events: none;
}

.filtro-input,
.filtro-select {
    width: 100%;
    padding: 0.75rem 0.75rem 0.75rem 2.75rem;
    border-radius: var(--border-r2);
    border: 2px solid var(--col-button-border);
    background: var(--col-input-bg);
    color: var(--col-input-text);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.filtro-input:focus,
.filtro-select:focus {
    outline: none;
    border-color: var(--col-focus);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.2);
    transform: translateY(-2px);
}

.filtro-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

/* Lista de palabras */
.palabras-lista {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
    gap: 0.875rem;
}

@media (min-width: 480px) {
    .palabras-lista {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 1rem;
    }
}

.palabra-card {
    background: linear-gradient(135deg, var(--col-button-bg) 0%, var(--col-inset-bg) 100%);
    border: 2px solid var(--col-button-border);
    border-radius: var(--border-r3);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    position: relative;
}

.palabra-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--col-focus) 0%, #7c3aed 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.palabra-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 12px 32px rgba(124, 58, 237, 0.25);
    border-color: var(--col-focus);
}

.palabra-card:hover::before {
    transform: scaleX(1);
}

.palabra-card:active {
    transform: translateY(-3px) scale(1);
}

.palabra-card-content {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.palabra-card-quechua {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.palabra-card-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.palabra-card-quechua h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--col-focus);
    margin: 0;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Chat Interactivo - Premium Style */
#chat-interactivo-chat-container {
    background-color: var(--col-bg);
    /* O un color de fondo ligeramente diferente */
    background-image:
        radial-gradient(circle at 10% 20%, rgba(var(--primary-rgb), 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(124, 58, 237, 0.05) 0%, transparent 20%);
    border-radius: var(--border-r3);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.05);
    scrollbar-width: thin;
    scrollbar-color: var(--col-focus) transparent;
}

#chat-interactivo-chat-container::-webkit-scrollbar {
    width: 6px;
}

#chat-interactivo-chat-container::-webkit-scrollbar-track {
    background: transparent;
}

#chat-interactivo-chat-container::-webkit-scrollbar-thumb {
    background-color: var(--col-focus);
    border-radius: 20px;
}

/* Chat Messages Bubbles Override */
/* User Bubble */
#chat-interactivo-chat-mensajes>div:nth-child(even)>div,
/* Assuming alternating structure if classes aren't reliable, but structure is: flex row > bubble */
#chat-interactivo-chat-mensajes>div[style*="justify-content: flex-end"]>div {
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%) !important;
    color: white !important;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
}

/* App Bubble */
#chat-interactivo-chat-mensajes>div[style*="justify-content: flex-start"]>div {
    background: var(--col-card-bg) !important;
    color: var(--col-text) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05) !important;
    border: 1px solid var(--col-button-border) !important;
}

/* System Message Bubble */
#chat-interactivo-chat-mensajes>div[style*="justify-content: center"]>div {
    background: rgba(var(--primary-rgb), 0.1) !important;
    /* Adjust if primary-rgb is not defined, safe fallback needed */
    backdrop-filter: blur(5px);
    border: 1px solid var(--col-focus);
    color: var(--col-focus) !important;
}

#chat-interactivo-input-container {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    padding: 1rem;
    border-radius: 0 0 var(--border-r3) var(--border-r3);
}

#chat-interactivo-input-texto {
    background: var(--col-input-bg);
    border: 2px solid transparent;
    border-radius: 25px;
    padding: 12px 20px;
    color: var(--col-text);
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

#chat-interactivo-input-texto:focus {
    background: var(--col-bg);
    border-color: var(--col-focus);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.1);
    transform: translateY(-1px);
}

#chat-interactivo-btn-enviar {
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    border: none;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#chat-interactivo-btn-enviar:hover {
    transform: scale(1.1) rotate(-10deg);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.4);
}

#chat-interactivo-btn-enviar:active {
    transform: scale(0.95);
}

.palabra-card-espanol {
    font-size: 0.95rem;
    color: var(--col-text-faint);
    line-height: 1.5;
    padding: 0.75rem 0;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    background: rgba(0, 0, 0, 0.02);
    /* Slight tint */
    margin: 0 -1rem;
    /* Extend to edges */
    padding-left: 1rem;
    padding-right: 1rem;
}

@media (min-width: 480px) {
    .palabra-card-content {
        padding: 1.25rem;
        gap: 0.875rem;
    }

    .palabra-card-quechua h3 {
        font-size: 1.375rem;
    }

    .palabra-card-espanol {
        font-size: 0.95rem;
        padding: 0.625rem 0;
    }
}

.palabra-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}


.palabra-card-arrow {
    font-size: 1.25rem;
    color: var(--col-focus);
    transition: transform 0.3s ease;
}

.palabra-card:hover .palabra-card-arrow {
    transform: translateX(4px);
}

.palabra-detalle-card {
    padding: 1.25rem;
    background: linear-gradient(135deg, var(--col-inset-bg) 0%, var(--col-button-bg) 100%);
    border-radius: var(--border-r3);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    border: 2px solid var(--col-button-border);
}

.palabra-detalle-header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 2px solid var(--col-focus);
}

.palabra-detalle-icon {
    font-size: 2rem;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    width: 50px;
    height: 50px;
    border-radius: var(--border-r2);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(124, 58, 237, 0.25);
}

.palabra-detalle-title-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0;
    /* Permite que el texto se ajuste */
}

.palabra-detalle-quechua-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    word-break: break-word;
    overflow-wrap: break-word;
}

@media (min-width: 480px) {
    .palabra-detalle-card {
        padding: 1.75rem;
    }

    .palabra-detalle-header {
        gap: 1rem;
        margin-bottom: 1.5rem;
        padding-bottom: 1.5rem;
        border-bottom-width: 2px;
    }

    .palabra-detalle-icon {
        font-size: 2.5rem;
        width: 60px;
        height: 60px;
    }

    .palabra-detalle-quechua-title {
        font-size: 2rem;
    }
}

@media (min-width: 768px) {
    .palabra-detalle-card {
        padding: 2.5rem;
    }

    .palabra-detalle-header {
        gap: 1.5rem;
        margin-bottom: 2rem;
        padding-bottom: 2rem;
        border-bottom-width: 3px;
    }

    .palabra-detalle-icon {
        font-size: 3.5rem;
        width: 75px;
        height: 75px;
    }

    .palabra-detalle-quechua-title {
        font-size: 3rem;
    }
}

.palabra-detalle-categoria {
    font-size: 0.75rem;
    padding: 0.375rem 0.875rem;
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    color: white;
    border-radius: var(--border-r2);
    text-transform: capitalize;
    font-weight: 600;
    display: inline-block;
    width: fit-content;
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.2);
}

.palabra-detalle-content {
    margin-top: 1.25rem;
}

.palabra-detalle-espanol {
    background: var(--col-button-bg);
    padding: 1rem;
    border-radius: var(--border-r2);
    border-left: 3px solid var(--col-focus);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.palabra-detalle-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--col-text-faint);
    margin-bottom: 0.625rem;
    letter-spacing: 0.5px;
}

.palabra-detalle-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--col-text);
    line-height: 1.5;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

@media (min-width: 480px) {
    .palabra-detalle-categoria {
        font-size: 0.875rem;
        padding: 0.5rem 1.25rem;
    }

    .palabra-detalle-content {
        margin-top: 1.75rem;
    }

    .palabra-detalle-espanol {
        padding: 1.25rem;
        border-radius: var(--border-r3);
        border-left-width: 4px;
    }

    .palabra-detalle-label {
        font-size: 0.75rem;
        margin-bottom: 0.75rem;
    }

    .palabra-detalle-value {
        font-size: 1.25rem;
    }
}

@media (min-width: 768px) {
    .palabra-detalle-content {
        margin-top: 2rem;
    }

    .palabra-detalle-espanol {
        padding: 1.5rem;
    }

    .palabra-detalle-value {
        font-size: 1.5rem;
    }
}

:focus-visible {
    box-shadow: var(--col-focus) 0px 0px 0px 3px;
    outline: none;
}

@media (min-width: 33.25rem) {
    .seccion {
        padding-top: 4rem;
    }

    .mem-instruction {
        font-size: 1.875rem;
    }

    #scr-keyboard {
        width: 90%;
    }
}

/* Ajustes para evitar superposición */
body {
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
    margin: 0;
}

#contenido {
    padding-bottom: env(safe-area-inset-bottom);
}

/* ============================================
   ESTILOS PARA EL JUEGO DE MEMORIA DE PARES
   ============================================ */

.memoria-header {
    margin-bottom: 1.5rem;
}

.memoria-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--col-text);
    margin-bottom: 1rem;
    text-align: center;
}

.memoria-stats {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
    background: var(--col-inset-bg);
    padding: 1rem;
    border-radius: var(--border-r4);
    border: var(--border-width) solid var(--col-button-border);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    flex: 1;
    min-width: 80px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--col-text-faint);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--col-focus);
}

.memoria-grid {
    display: grid;
    gap: 0.75rem;
    padding: 1rem;
    max-width: 100%;
    margin: 0 auto;
    grid-template-columns: repeat(3, 1fr);
    perspective: 1200px;
    -webkit-perspective: 1200px;
}

.memoria-carta {
    aspect-ratio: 1;
    position: relative;
    cursor: pointer;
    perspective: 1000px;
    -webkit-perspective: 1000px;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    transition: transform 0.15s ease;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.memoria-carta:active:not(.volteada):not(.encontrada) {
    transform: scale(0.95);
}

.memoria-carta-front,
.memoria-carta-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    transition: transform 0.45s cubic-bezier(0.2, 0.85, 0.35, 1.2), opacity 0.2s ease, visibility 0.45s;
    will-change: transform, opacity;
}

.memoria-carta-front {
    background: linear-gradient(135deg, var(--col-focus) 0%, #7c3aed 100%);
    color: white;
    font-size: 2rem;
    font-weight: 800;
    transform: rotateY(0deg);
    -webkit-transform: rotateY(0deg);
    border: none;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
    z-index: 2;
    opacity: 1;
    visibility: visible;
}

.memoria-carta-back {
    background: var(--col-card-bg);
    color: var(--col-text);
    transform: rotateY(180deg);
    -webkit-transform: rotateY(180deg);
    border: 2px solid var(--col-button-border);
    padding: 0.75rem;
    font-weight: 600;
    z-index: 1;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Carta volteada durante el turno */
.memoria-carta.volteada .memoria-carta-front {
    transform: rotateY(180deg);
    -webkit-transform: rotateY(180deg);
    opacity: 0;
    visibility: hidden;
    z-index: 1;
    pointer-events: none;
}

.memoria-carta.volteada .memoria-carta-back {
    transform: rotateY(0deg);
    -webkit-transform: rotateY(0deg);
    opacity: 1;
    visibility: visible;
    z-index: 5;
    pointer-events: auto;
}

/* Par encontrado: queda permanentemente visible el reverso verde */
.memoria-carta.encontrada {
    pointer-events: none !important;
    cursor: default;
}

.memoria-carta.encontrada .memoria-carta-front {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    z-index: 0 !important;
    transform: rotateY(180deg) !important;
    -webkit-transform: rotateY(180deg) !important;
}

.memoria-carta.encontrada .memoria-carta-back {
    display: flex !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: rotateY(0deg) !important;
    -webkit-transform: rotateY(0deg) !important;
    z-index: 10 !important;
    background: linear-gradient(135deg, #16a34a 0%, #22c55e 100%) !important;
    color: #ffffff !important;
    border-color: #22c55e !important;
    box-shadow: 0 4px 16px rgba(34, 197, 94, 0.45) !important;
}

.memoria-carta.correcto {
    animation: correctoPulse 0.45s ease-out;
}

.memoria-carta.incorrecto {
    animation: incorrectoShake 0.4s ease-in-out;
}

@keyframes correctoPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.08);
    }
}

@keyframes incorrectoShake {
    0%, 100% {
        transform: translateX(0);
    }
    20%, 60% {
        transform: translateX(-6px);
    }
    40%, 80% {
        transform: translateX(6px);
    }
}

.memoria-texto {
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    word-wrap: break-word;
    line-height: 1.3;
}

.memoria-victoria {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.victoria-content {
    background: var(--col-inset-bg);
    border-radius: var(--border-r4);
    padding: 2rem;
    max-width: 90%;
    width: 400px;
    text-align: center;
    border: 2px solid var(--col-focus);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.victoria-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--col-text);
    margin-bottom: 0.5rem;
}

.victoria-content p {
    font-size: 1.125rem;
    color: var(--col-text-faint);
    margin-bottom: 1.5rem;
}

.victoria-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.victoria-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--col-button-bg);
    border-radius: var(--border-r2);
    border: var(--border-width) solid var(--col-button-border);
}

.victoria-label {
    font-size: 1rem;
    color: var(--col-text-faint);
    font-weight: 500;
}

.victoria-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--col-focus);
}

/* Responsive para el juego de memoria */
@media (max-width: 480px) {
    .memoria-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
        padding: 0.5rem;
    }

    .memoria-carta-front {
        font-size: 1.5rem;
    }

    .memoria-texto {
        font-size: 0.875rem;
    }

    .memoria-stats {
        padding: 0.75rem;
        gap: 0.5rem;
    }

    .stat-item {
        min-width: 70px;
    }

    .stat-label {
        font-size: 0.7rem;
    }

    .stat-value {
        font-size: 1.1rem;
    }

    .victoria-content {
        padding: 1.5rem;
        width: 95%;
    }

    .victoria-content h2 {
        font-size: 1.5rem;
    }
}

/* ============================================
   ESTILOS PARA EL JUEGO DE OPCIÓN MÚLTIPLE
   ============================================ */

.multiple-header {
    margin-bottom: 1.5rem;
}

.multiple-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--col-text);
    margin-bottom: 1rem;
    text-align: center;
}

.multiple-stats {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
    background: var(--col-inset-bg);
    padding: 1rem;
    border-radius: var(--border-r4);
    border: var(--border-width) solid var(--col-button-border);
    flex-wrap: wrap;
}

.correct-stat {
    color: #22c55e !important;
}

.error-stat {
    color: #ef4444 !important;
}

.multiple-container {
    padding: 1rem;
}

.multiple-question-card {
    background: var(--col-inset-bg);
    border-radius: var(--border-r4);
    padding: 2rem;
    margin-bottom: 1.5rem;
    border: 2px solid var(--col-focus);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.question-label {
    font-size: 0.875rem;
    color: var(--col-text-faint);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
    font-weight: 600;
}

.multiple-pregunta {
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pregunta-texto {
    font-size: 2rem;
    font-weight: 700;
    color: var(--col-text);
    word-wrap: break-word;
    line-height: 1.3;
}

.multiple-opciones {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.multiple-opcion {
    background: var(--col-button-bg);
    border: 2px solid var(--col-button-border);
    border-radius: var(--border-r3);
    padding: 1.25rem 1.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--col-text);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    word-wrap: break-word;
}

.multiple-opcion:hover {
    background: var(--col-button-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.multiple-opcion:active {
    transform: translateY(0);
}

.multiple-opcion.correcto {
    background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
    border-color: #22c55e;
    color: white;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.4);
}

.multiple-opcion.incorrecto {
    background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
    border-color: #ef4444;
    color: white;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
}

.multiple-feedback {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeInOverlay 0.5s ease;
    padding: 1rem;
}

@keyframes fadeInOverlay {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.multiple-feedback>div {
    animation: slideUpBounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideUpBounce {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }

    60% {
        transform: translateY(-10px) scale(1.02);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feedback-correcto-bg {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.25) 0%, rgba(22, 163, 74, 0.15) 100%);
    border: 3px solid #22c55e;
    box-shadow: 0 0 30px rgba(34, 197, 94, 0.4);
}

.feedback-incorrecto-bg {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.25) 0%, rgba(220, 38, 38, 0.15) 100%);
    border: 3px solid #ef4444;
    box-shadow: 0 0 30px rgba(239, 68, 68, 0.4);
}

.feedback-text {
    font-size: 1.125rem;
    font-weight: 600;
}

.feedback-correcto,
.feedback-incorrecto {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.feedback-icon {
    font-size: 1.5rem;
}

.feedback-message {
    color: var(--col-text);
}

.multiple-resumen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.resumen-content {
    background: var(--col-inset-bg);
    border-radius: var(--border-r4);
    padding: 2rem;
    max-width: 90%;
    width: 400px;
    text-align: center;
    border: 2px solid var(--col-focus);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.5s ease;
}

.resumen-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--col-text);
    margin-bottom: 1.5rem;
}

.resumen-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.resumen-stat {
    padding: 1rem;
    border-radius: var(--border-r2);
    border: var(--border-width) solid var(--col-button-border);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.resumen-stat.correct {
    background: rgba(34, 197, 94, 0.1);
    border-color: #22c55e;
}

.resumen-stat.error {
    background: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
}

.resumen-stat.total {
    background: var(--col-button-bg);
}

.resumen-stat.porcentaje {
    background: rgba(59, 130, 246, 0.1);
    border-color: #3b82f6;
}

.resumen-label {
    font-size: 0.875rem;
    color: var(--col-text-faint);
    font-weight: 500;
}

.resumen-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--col-text);
}

.resumen-stat.correct .resumen-value {
    color: #22c55e;
}

.resumen-stat.error .resumen-value {
    color: #ef4444;
}

.resumen-stat.porcentaje .resumen-value {
    color: #3b82f6;
}

/* Responsive para opción múltiple */
@media (max-width: 480px) {
    .multiple-question-card {
        padding: 1.5rem;
    }

    .pregunta-texto {
        font-size: 1.5rem;
    }

    .multiple-opcion {
        padding: 1rem;
        font-size: 1rem;
        min-height: 50px;
    }
}

/* Estilos para el juego de Empareja */
.empareja-columna {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

#empareja-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 900px) {
    #empareja-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .empareja-columna {
        gap: 0.75rem;
    }
}

.empareja-cuadro {
    background: var(--col-button-bg);
    border: 2px solid var(--col-button-border);
    border-radius: var(--border-r3);
    padding: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--col-button-border) 0 3px 0;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    color: var(--col-text);
    word-wrap: break-word;
}

.empareja-cuadro:hover:not(.empareja-cuadro.emparejado):not(.empareja-cuadro.seleccionado) {
    background: var(--col-inset-bg);
    transform: translateY(-2px);
    box-shadow: var(--col-button-border) 0 5px 0;
}

.empareja-cuadro:active:not(.empareja-cuadro.emparejado) {
    transform: translateY(1px);
    box-shadow: var(--col-button-border) 0 2px 0;
}

.empareja-cuadro.seleccionado {
    background: linear-gradient(135deg, rgba(0, 159, 187, 0.2) 0%, rgba(0, 159, 187, 0.1) 100%);
    border-color: var(--col-focus);
    box-shadow: 0 0 15px rgba(0, 159, 187, 0.4);
    transform: scale(1.05);
}

.empareja-cuadro.correcto {
    background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
    border-color: #22c55e;
    color: white;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.4);
    animation: emparejaCorrecto 0.5s ease;
}

.empareja-cuadro.incorrecto {
    background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
    border-color: #ef4444;
    color: white;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
    animation: emparejaIncorrecto 0.5s ease;
}

.empareja-cuadro.emparejado {
    cursor: default;
    opacity: 0.7;
}

@keyframes emparejaCorrecto {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes emparejaIncorrecto {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-10px);
    }

    75% {
        transform: translateX(10px);
    }
}

.empareja-mensaje {
    padding: 1rem;
    border-radius: var(--border-r2);
    text-align: center;
    font-weight: 600;
    font-size: 1rem;
    margin-top: 1rem;
    animation: emparejaMensajeEntrada 0.3s ease;
}

.empareja-mensaje.correcto {
    background: var(--col-correct-bg);
    color: var(--col-correct-text);
    border: 2px solid var(--col-correct-border);
}

.empareja-mensaje.incorrecto {
    background: var(--col-wrong-bg);
    color: var(--col-wrong-text);
    border: 2px solid var(--col-wrong-border);
}

@keyframes emparejaMensajeEntrada {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes emparejaOverlayEntrada {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@media (max-width: 600px) {
    .empareja-cuadro {
        padding: 0.75rem;
        font-size: 0.85rem;
        min-height: 60px;
    }

    .resumen-stats {
        grid-template-columns: 1fr;
    }
}

/* Estilos para Sopa de Letras */
#sopa-grid {
    display: grid;
    grid-template-columns: repeat(15, 1fr);
    gap: 2px;
    padding: 0.75rem;
    background: var(--col-inset-bg);
    border-radius: var(--border-r2);
    border: var(--border-width) solid var(--col-button-border);
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
}

.sopa-celda {
    aspect-ratio: 1;
    background: var(--col-button-bg);
    border: 1px solid var(--col-button-border);
    border-radius: var(--border-r1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--col-text);
    user-select: none;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    min-width: 0;
}

.sopa-celda:hover:not(.sopa-encontrada):not(.sopa-seleccionada) {
    background: var(--col-inset-bg);
    transform: scale(1.15);
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-color: var(--col-focus);
}

.sopa-celda.sopa-seleccionada {
    background: linear-gradient(135deg, rgba(0, 159, 187, 0.3) 0%, rgba(0, 159, 187, 0.2) 100%);
    border-color: var(--col-focus);
    box-shadow: 0 0 8px rgba(0, 159, 187, 0.4);
    transform: scale(1.1);
}

.sopa-celda.sopa-encontrada {
    background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
    border-color: #22c55e;
    color: white;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.4);
    cursor: default;
}

#sopa-grid-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    margin: 0 auto;
    padding: 0;
}

#sopa-palabras-lista {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding: 0.875rem;
    background: var(--col-inset-bg);
    border-radius: var(--border-r2);
    border: var(--border-width) solid var(--col-button-border);
    max-height: 120px;
    overflow-y: auto;
}

@media (max-width: 600px) {
    #sopa-grid {
        padding: 0.5rem;
        gap: 1.5px;
    }

    .sopa-celda {
        font-size: 0.65rem;
    }

    #sopa-palabras-lista {
        max-height: 100px;
        padding: 0.75rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 400px) {
    #sopa-grid {
        padding: 0.4rem;
        gap: 1px;
    }

    .sopa-celda {
        font-size: 0.6rem;
    }
}

/* Estilos para Velocidad */
.velocidad-contador-tiempo {
    transition: all 0.3s ease;
    display: inline-block;
}

.velocidad-contador-tiempo.pulso-urgencia {
    animation: tiempoUrgencia 0.5s ease-in-out infinite;
    color: var(--col-wrong-text) !important;
    text-shadow: 0 0 20px rgba(239, 68, 68, 0.6) !important;
}

.velocidad-contador-tiempo.pulso-advertencia {
    animation: tiempoAdvertencia 1s ease-in-out infinite;
    color: #f59e0b !important;
    text-shadow: 0 0 15px rgba(245, 158, 11, 0.5) !important;
}

@keyframes tiempoUrgencia {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.15);
        opacity: 0.9;
    }
}

@keyframes tiempoAdvertencia {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.08);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

/* Estilos para el botón Continuar en el overlay de nivel */
#velocidad-nivel-continuar {
    margin-top: 1.5rem;
    padding: 0.75rem 2rem;
    background: white;
    color: #f59e0b;
    border: none;
    border-radius: var(--border-r2);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

#velocidad-nivel-continuar:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
    background: #fef3c7;
}

#velocidad-nivel-continuar:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.velocidad-opcion {
    background: var(--col-button-bg);
    border: 2px solid var(--col-button-border);
    border-radius: var(--border-r3);
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--col-button-border) 0 3px 0;
    text-align: center;
    font-weight: 600;
    font-size: 1rem;
    color: var(--col-text);
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    word-break: break-word;
}

.velocidad-opcion:hover:not(.velocidad-opcion.deshabilitada) {
    background: var(--col-inset-bg);
    transform: translateY(-2px);
    box-shadow: var(--col-button-border) 0 5px 0;
}

.velocidad-opcion:active:not(.velocidad-opcion.deshabilitada) {
    transform: translateY(1px);
    box-shadow: var(--col-button-border) 0 2px 0;
}

.velocidad-opcion.correcta {
    background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
    border-color: #22c55e;
    color: white;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.4);
    animation: emparejaCorrecto 0.5s ease;
}

.velocidad-opcion.incorrecta {
    background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
    border-color: #ef4444;
    color: white;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
    animation: emparejaIncorrecto 0.5s ease;
}

.velocidad-opcion.deshabilitada {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Estilos para Adivina la Palabra */
.adivina-letra-btn {
    background: var(--col-button-bg);
    border: 2px solid var(--col-button-border);
    border-radius: var(--border-r2);
    padding: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--col-button-border) 0 2px 0;
    text-align: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--col-text);
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.adivina-letra-btn:hover:not(.adivina-letra-btn.usada):not(.adivina-letra-btn.deshabilitada) {
    background: var(--col-inset-bg);
    transform: translateY(-2px);
    box-shadow: var(--col-button-border) 0 4px 0;
}

.adivina-letra-btn:active:not(.adivina-letra-btn.usada):not(.adivina-letra-btn.deshabilitada) {
    transform: translateY(1px);
    box-shadow: var(--col-button-border) 0 1px 0;
}

.adivina-letra-btn.correcta {
    background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
    border-color: #22c55e;
    color: white;
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.4);
}

.adivina-letra-btn.incorrecta {
    background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
    border-color: #ef4444;
    color: white;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
    animation: errorPulse 0.5s ease;
}

.adivina-simbolo-especial {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    border-color: #f59e0b;
    color: white;
    font-weight: 800;
}

.adivina-letra-btn.usada {
    opacity: 0.4;
    cursor: default;
}

.adivina-letra-btn.deshabilitada {
    opacity: 0.3;
    cursor: not-allowed;
}

#adivina-teclado {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.5rem;
}

/* Animaciones para efectos dramáticos en Adivina la Palabra */
@keyframes errorPulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
    }

    50% {
        transform: scale(1.1);
        box-shadow: 0 0 25px rgba(239, 68, 68, 0.8);
    }
}

@keyframes shakeError {

    0%,
    100% {
        transform: translateX(0) rotate(0deg);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-5px) rotate(-2deg);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(5px) rotate(2deg);
    }
}

@keyframes screenShake {

    0%,
    100% {
        transform: translateX(0);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-3px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(3px);
    }
}

@keyframes errorFlash {

    0%,
    100% {
        color: var(--col-text);
        background: transparent;
    }

    25%,
    75% {
        color: white;
        background: rgba(239, 68, 68, 0.3);
        text-shadow: 0 0 10px rgba(239, 68, 68, 0.8);
    }

    50% {
        color: white;
        background: rgba(239, 68, 68, 0.5);
        text-shadow: 0 0 15px rgba(239, 68, 68, 1);
    }
}

@media (max-width: 600px) {
    #adivina-teclado {
        grid-template-columns: repeat(5, 1fr) !important;
    }

    .adivina-letra-btn {
        padding: 0.75rem;
        font-size: 1rem;
        min-height: 45px;
    }

    #adivina-palabra-oculta {
        font-size: 1.2rem !important;
        letter-spacing: 0.2rem !important;
    }
}

.resumen-content {
    padding: 1.5rem;
    width: 95%;
}

.resumen-content h2 {
    font-size: 1.5rem;
}

/* Estilos para Tarjetas (Estilo Anki) */

/* Premium Flashcards */
.tarjeta-flashcard {
    width: 100%;
    height: 420px;
    /* Slight increase for grander feel */
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    /* Bouncier flip */
    cursor: pointer;
    margin-bottom: 2rem;
}

.tarjeta-flashcard.flipped {
    transform: rotateY(180deg);
}

.tarjeta-side {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 24px;
    /* More rounded */
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: var(--col-card-bg);
    box-shadow:
        0 10px 30px -5px rgba(0, 0, 0, 0.1),
        0 4px 10px -5px rgba(0, 0, 0, 0.05),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    /* Glass effect if bg is transparent */
}

/* Front Design */
.tarjeta-front {
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.05) 0%, rgba(255, 255, 255, 0.8) 100%);
}

[data-theme="dark"] .tarjeta-front {
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.1) 0%, rgba(30, 30, 35, 0.8) 100%);
}

/* Back Design */
.tarjeta-back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.05) 0%, rgba(255, 255, 255, 0.8) 100%);
}

[data-theme="dark"] .tarjeta-back {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(30, 30, 35, 0.8) 100%);
}

.tarjeta-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

/* Floating content animation */
.tarjeta-content>* {
    animation: floatContent 6s ease-in-out infinite;
}

@keyframes floatContent {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

@media (max-width: 600px) {
    .tarjeta-side {
        padding: 1.5rem;
        height: 350px;
    }

    .tarjeta-flashcard {
        height: 350px;
    }

    #tarjeta-pregunta,
    #tarjeta-respuesta {
        font-size: 1.5rem !important;
    }
}

/* ========== MODO OSCURO ========== */
[data-theme="dark"] {
    --col-text: rgb(230, 230, 230);
    --col-focus: rgb(100, 200, 255);
    --col-bg: rgb(18, 18, 20);
    --col-card-bg: rgb(30, 30, 35);
    --col-input-text: rgb(230, 230, 230);
    --col-input-border: rgb(60, 60, 70);
    --col-input-bg: rgb(30, 30, 35);
    --col-button-text: rgb(230, 230, 230);
    --col-button-border: rgb(60, 60, 70);
    --col-button-bg: rgb(25, 25, 30);
    --col-text-faint: rgb(150, 150, 160);
    --col-sep: rgb(50, 50, 60);
    --col-inset-bg: rgb(30, 30, 35);
    --col-correct-text: rgb(200, 255, 220);
    --col-correct-border: rgb(0, 200, 120);
    --col-correct-bg: rgb(0, 80, 50);
    --col-close-text: rgb(255, 200, 150);
    --col-close-border: rgb(237, 150, 80);
    --col-close-bg: rgb(100, 50, 30);
    --col-wrong-text: rgb(255, 180, 180);
    --col-wrong-border: rgb(200, 60, 70);
    --col-wrong-bg: rgb(80, 20, 25);
    --col-spell-missed: #4a6b3a;
    --col-spell-bad: #6b3a3a;
    --col-spell-good: #ffffff00;
    --col-pressed-outline: #3a3a3aaa;

    /* Premium UI Variables - Dark Mode Overrides */
    --glass-bg: rgba(30, 30, 35, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --card-hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --backdrop-blur: 12px;

    /* Colores adicionales para modo oscuro */
    --col-success-gradient: linear-gradient(135deg, rgba(34, 197, 94, 0.9) 0%, rgba(22, 163, 74, 0.9) 100%);
    --col-purple-gradient: linear-gradient(135deg, rgba(124, 58, 237, 0.9) 0%, rgba(168, 85, 247, 0.9) 100%);
    --col-green-gradient: linear-gradient(135deg, rgba(5, 150, 105, 0.9) 0%, rgba(16, 185, 129, 0.9) 100%);
    --col-orange-gradient: linear-gradient(135deg, rgba(245, 158, 11, 0.9) 0%, rgba(251, 191, 36, 0.9) 100%);
    --col-orange-text: rgb(255, 200, 100);
    --col-success-text: rgb(150, 255, 180);
    --col-success-text: rgb(150, 255, 180);
    --col-error-text: rgb(255, 150, 150);

    /* Background Gradient (Dark Mode) */
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(0, 20, 40, 0.4) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(40, 10, 60, 0.4) 0px, transparent 50%);
}

/* Dark Mode Theme Overrides */
[data-theme="dark"][data-color-scheme="green"] {
    --col-focus: #34d399;
    /* Lighter green for dark mode */
    --col-bg: #051a14;
    /* Deep forest green */
    --col-inset-bg: #0a2920;
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(6, 78, 59, 0.4) 0px, transparent 60%),
        radial-gradient(at 100% 100%, rgba(2, 44, 34, 0.4) 0px, transparent 60%);
}

[data-theme="dark"][data-color-scheme="pink"] {
    --col-focus: #f472b6;
    /* Lighter pink for dark mode */
    --col-bg: #1f0810;
    /* Deep burgundy */
    --col-inset-bg: #2e0c18;
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(131, 24, 67, 0.4) 0px, transparent 60%),
        radial-gradient(at 100% 100%, rgba(80, 7, 36, 0.4) 0px, transparent 60%);
}

[data-theme="dark"][data-color-scheme="purple"] {
    --col-focus: #a78bfa;
    /* Lighter purple for dark mode */
    --col-bg: #100a1f;
    /* Deep indigo */
    --col-inset-bg: #1a102e;
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(76, 29, 149, 0.4) 0px, transparent 60%),
        radial-gradient(at 100% 100%, rgba(46, 16, 101, 0.4) 0px, transparent 60%);
}
[data-theme="dark"][data-color-scheme="blue"] {
    --col-focus: #60a5fa;
    /* Lighter blue for dark mode */
    --col-bg: #0b1120;
    /* Deep midnight blue */
    --col-inset-bg: #172554;
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(30, 58, 138, 0.4) 0px, transparent 60%),
        radial-gradient(at 100% 100%, rgba(23, 37, 84, 0.4) 0px, transparent 60%);
}

[data-theme="dark"][data-color-scheme="orange"] {
    --col-focus: #fb923c;
    /* Bright orange */
    --col-bg: #1c0c05;
    /* Deep brown/orange */
    --col-inset-bg: #2d1305;
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(124, 45, 18, 0.4) 0px, transparent 60%),
        radial-gradient(at 100% 100%, rgba(67, 20, 7, 0.4) 0px, transparent 60%);
}

[data-theme="dark"][data-color-scheme="red"] {
    --col-focus: #f87171;
    /* Soft red */
    --col-bg: #1a0505;
    /* Deep dark red */
    --col-inset-bg: #2b0808;
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(127, 29, 29, 0.4) 0px, transparent 60%),
        radial-gradient(at 100% 100%, rgba(69, 10, 10, 0.4) 0px, transparent 60%);
}

[data-theme="dark"][data-color-scheme="slate"] {
    --col-focus: #94a3b8;
    /* Light slate */
    --col-bg: #020617;
    /* Almost black slate */
    --col-inset-bg: #0f172a;
    --bg-gradient:
        radial-gradient(at 0% 0%, rgba(30, 41, 59, 0.4) 0px, transparent 60%),
        radial-gradient(at 100% 100%, rgba(15, 23, 42, 0.4) 0px, transparent 60%);
}

/* Chat Dark Mode Overrides */
[data-theme="dark"] #chat-interactivo-chat-container {
    background-color: var(--col-bg);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(0, 159, 187, 0.1) 0%, transparent 20%);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] #chat-interactivo-input-container {
    background: rgba(30, 30, 35, 0.8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========== PANTALLA DE AJUSTES ========== */
.ajustes-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
}

.ajustes-titulo {
    font-size: 2rem;
    font-weight: 700;
    color: var(--col-text);
    margin-bottom: 2rem;
    text-align: center;
}

.ajustes-seccion {
    background: var(--col-inset-bg);
    border: var(--border-width) solid var(--col-button-border);
    border-radius: var(--border-r3);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.ajustes-subtitulo {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--col-text);
    margin-bottom: 1rem;
}

.ajustes-opcion {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--col-sep);
}

.ajustes-opcion:last-child {
    border-bottom: none;
}

.ajustes-opcion-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    margin-right: 1rem;
}

.ajustes-opcion-titulo {
    font-size: 1rem;
    font-weight: 600;
    color: var(--col-text);
    margin-bottom: 0.25rem;
}

.ajustes-opcion-descripcion {
    font-size: 0.875rem;
    color: var(--col-text-faint);
    line-height: 1.4;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--col-input-bg);
    border: 2px solid var(--col-input-border);
    transition: 0.3s;
    border-radius: 26px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

.toggle-switch input:checked+.toggle-slider {
    background-color: var(--col-focus);
    border-color: var(--col-focus);
}

.toggle-switch input:checked+.toggle-slider:before {
    transform: translateX(24px);
}

.toggle-switch input:focus+.toggle-slider {
    box-shadow: 0 0 1px var(--col-focus);
}

.ajustes-boton {
    width: 100%;
    padding: 1rem;
    background: var(--col-button-bg);
    border: var(--border-width) solid var(--col-button-border);
    border-radius: var(--border-r2);
    color: var(--col-text);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.ajustes-boton:hover {
    background: var(--col-inset-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.ajustes-boton:active {
    transform: translateY(0);
}

.ajustes-boton-icono {
    font-size: 1.25rem;
}

.ajustes-boton-texto {
    font-weight: 600;
}

/* Theme Selector Grid */
.configuracion-temas-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding: 0.5rem 0;
}

.theme-btn {
    aspect-ratio: 1;
    border-radius: 50%;
    border: 2px solid var(--col-button-border);
    cursor: pointer;
    position: relative;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    background: var(--col-button-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.theme-btn:hover {
    transform: scale(1.1);
}

.theme-btn.active {
    transform: scale(1.15);
    box-shadow: 0 0 0 3px var(--col-focus), 0 4px 12px rgba(0, 0, 0, 0.2);
    border-color: white;
}

.theme-btn[data-theme="default"] { background: #ffffff; border: 2px solid #cbd5e1; }

.theme-btn[data-theme="green"] {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.theme-btn[data-theme="pink"] {
    background: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
}

.theme-btn[data-theme="purple"] {
    background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
}

.theme-btn[data-theme="blue"] { background: linear-gradient(135deg, #60a5fa 0%, #2563eb 100%); }

/* Estilos para pista de sopa de letras */
.sopa-pista {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%) !important;
    color: white !important;
    font-weight: 900 !important;
    animation: pistaPulse 1.5s ease-in-out infinite !important;
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.8) !important;
    transform: scale(1.1) !important;
    z-index: 100 !important;
}

@keyframes pistaPulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(251, 191, 36, 0.8);
        transform: scale(1.1);
    }
    50% {
        box-shadow: 0 0 30px rgba(251, 191, 36, 1), 0 0 40px rgba(251, 191, 36, 0.6);
        transform: scale(1.15);
    }
}

/* Bot�n de ayuda para sopa de letras */
.sopa-ayuda-btn {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-r3);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.sopa-ayuda-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(251, 191, 36, 0.4);
}

.sopa-ayuda-btn:active {
    transform: translateY(0);
}


/* Animación para mensaje de ayuda en Adivina */
@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
    20% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    80% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
}

/* Estilos para botón de ayuda en Adivina */
.adivina-ayuda-btn:disabled {
    opacity: 0.5 !important;
    cursor: not-allowed !important;
    transform: none !important;
}

/* Theme: Orange (Ámbar) */
[data-color-scheme="orange"] {
    --col-focus: #f59e0b;
    --col-bg: #fffbeb;
    --col-inset-bg: #fef3c7;
    --col-correct-border: #d97706;
    --col-correct-bg: #fef3c7;
    --primary-gradient: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #b45309 100%);
    --secondary-gradient: linear-gradient(135deg, #fcd34d 0%, #fbbf24 100%);
    --bg-gradient: 
        radial-gradient(at 0% 0%, rgba(245, 158, 11, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(251, 191, 36, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(217, 119, 6, 0.05) 0px, transparent 50%);
}

/* Theme: Red (Rubí) */
[data-color-scheme="red"] {
    --col-focus: #ef4444;
    --col-bg: #fff1f2;
    --col-inset-bg: #ffe4e6;
    --col-correct-border: #dc2626;
    --col-correct-bg: #fee2e2;
    --primary-gradient: linear-gradient(135deg, #f87171 0%, #ef4444 50%, #991b1b 100%);
    --secondary-gradient: linear-gradient(135deg, #fca5a5 0%, #f87171 100%);
    --bg-gradient: 
        radial-gradient(at 0% 0%, rgba(239, 68, 68, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(248, 113, 113, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(220, 38, 38, 0.05) 0px, transparent 50%);
}

/* Theme: Slate (Titán) */
[data-color-scheme="slate"] {
    --col-focus: #64748b;
    --col-bg: #f8fafc;
    --col-inset-bg: #f1f5f9;
    --col-correct-border: #475569;
    --col-correct-bg: #e2e8f0;
    --primary-gradient: linear-gradient(135deg, #94a3b8 0%, #64748b 50%, #334155 100%);
    --secondary-gradient: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
    --bg-gradient: 
        radial-gradient(at 0% 0%, rgba(100, 116, 139, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(148, 163, 184, 0.06) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(71, 85, 105, 0.04) 0px, transparent 50%);
}

/* Botones de los nuevos temas */
.theme-btn[data-theme="orange"] {
    background: linear-gradient(135deg, #f97316 0%, #c2410c 100%);
}
.theme-btn[data-theme="red"] {
    background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
}
.theme-btn[data-theme="slate"] {
    background: linear-gradient(135deg, #64748b 0%, #334155 100%);
}



/* Ocultar campos Extra y Extra2 permanentemente */

#extraField, #extra2Field { display: none !important; }


/* =========================================
   ESTILOS PARA VERSIÓN LITE (SIN IMÁGENES)
   ========================================= */
body.app-lite .card-image-container,
body.app-lite .imagen-tarjeta,
body.app-lite .img-tarjeta,
body.app-lite img[src*="images/"] {
    display: none !important;
}

body.app-lite .card-front, 
body.app-lite .card-back {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 0 !important;
}

body.app-lite .card-word {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}


/* Animaciones para Modales */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}


/* OVERRIDE FOR PREMIUM BUTTONS */
.actividad-btn {
    display: flex;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 1.5rem !important;
    padding: 1.5rem !important;
    min-height: 100px !important;
    text-align: left !important;
    width: 100% !important;
    grid-column: 1 / -1 !important;
}

.actividad-icon {
    font-size: 2.2rem !important;
    margin-bottom: 0 !important;
    flex-shrink: 0 !important;
    width: 60px !important;
    display: flex !important;
    justify-content: center !important;
}

.actividad-info {
    display: flex !important;
    flex-direction: column !important;
    gap: 0.25rem !important;
    flex: 1 !important;
}

.actividad-titulo {
    font-size: 1.15rem !important;
    font-weight: 700 !important;
    margin: 0 !important;
}

.actividad-descripcion {
    font-size: 0.8rem !important;
    color: var(--col-text-faint) !important;
    margin: 0 !important;
    line-height: 1.4 !important;
}

/* Fix for media queries */
@media (max-width: 480px) {
    .actividades-grid {
        grid-template-columns: 1fr !important;
    }
    .actividad-btn {
        min-height: 90px !important;
    }
}