/**
 * Biblioteca Hipatia - IES Carpe Diem
 * 
 * Estilos principales de la aplicación.
 * Incluye:
 *   - Variables CSS para temas claro/oscuro y accesibilidad
 *   - Estilos responsive
 *   - Animaciones (splash, rotativas, fireworks, etc.)
 *   - Soporte para daltonismo y ajustes de tamaño/contraste
 * 
 * Cumple con WCAG 2.2 AA
 * Autor: [Tu nombre]
 * Versión: 1.0 (2026)
 */

:root {
    --bg-primary: #f4f4f4;
    --bg-secondary: white;
    --text-primary: #333;
    --text-secondary: #666;
    --border-color: #ddd;
    --btn-primary: #1a73e8;
    --btn-hover: #1a73e8;
    --btn-reserva: #2a2a2a;
    --btn-reserva-hover: #2a2a2a;
    --btn-solicitud: #2a2a2a;
    --btn-solicitud-hover: #2a2a2a;
    --btn-donaciones: #2a2a2a;
    --btn-donaciones-hover: #2a2a2a;
    --btn-reseña: #2a2a2a;
    --btn-reseña-hover: #2a2a2a;
    --btn-favoritos: #2a2a2a;
    --btn-favoritos-hover: #2a2a2a;
    --shadow: 0 2px 5px rgba(0,0,0,0.1);
    --chat-bg: #f9f9f9;
    --user-msg-bg: #c9c9c9;
    --bot-msg-bg: #c9c9c9;
    --bot-msg-color: #000000;
    --splash-bg: linear-gradient(135deg, rgb(255, 255, 255) 0%, #c8c8c8 50%, #ffffff 100%);
    --splash-text: rgb(0, 0, 0);
    --splash-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    --btn-proseguir: #17a2b8;
    --btn-proseguir-hover: #138496;
    --btn-buscar-libro: #3399ff;
    --btn-buscar-libro-hover: #1a73e8;
    --btn-sinopsis: #28a745;
    --btn-sinopsis-hover: #218838;
    --font-size: 1em;
    --letter-spacing: 0em;
    --button-size: 1em;
    --contrast: 1;
    --brightness: 1;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --border-color: #666;
    --btn-primary: #1a73e8;
    --btn-hover: #1a73e8;
    --btn-reserva: #2a2a2a;
    --btn-reserva-hover: #2a2a2a;
    --btn-solicitud: #2a2a2a;
    --btn-solicitud-hover: #2a2a2a;
    --btn-donaciones: #2a2a2a;
    --btn-donaciones-hover: #2a2a2a;
    --btn-reseña: #2a2a2a;
    --btn-reseña-hover: #2a2a2a;
    --btn-favoritos: #2a2a2a;
    --btn-favoritos-hover: #2a2a2a;
    --shadow: 0 2px 5px rgba(0,0,0,0.3);
    --chat-bg: #374151;
    --user-msg-bg: #3a3a3a;
    --bot-msg-bg: #3a3a3a;
    --bot-msg-color: #e0e0e0;
    --splash-bg: linear-gradient(135deg, #374151 0%, #374151 50%, #374151 100%);
    --splash-text: rgb(255, 255, 255);
    --splash-shadow: 2px 2px 4px rgba(255, 255, 255, 0.2);
    --btn-proseguir: #17a2b8;
    --btn-proseguir-hover: #138496;
    --btn-buscar-libro: #1a73e8;
    --btn-buscar-libro-hover: #1a73e8;
    --btn-sinopsis: #28a745;
    --btn-sinopsis-hover: #218838;
}

html {
    font-size: var(--font-size);
    transition: font-size 0.3s ease, filter 0.3s;
    filter: saturate(var(--contrast)) brightness(var(--brightness));
}

[data-daltonism="normal"] {
    filter: none;
}
[data-daltonism="deuteranomaly"] {
    filter: brightness(1.1) contrast(1.2) hue-rotate(30deg);
}
[data-daltonism="protanomaly"] {
    filter: brightness(1.1) contrast(1.2) sepia(0.3) hue-rotate(-30deg);
}
[data-daltonism="tritanomaly"] {
    filter: brightness(1.15) contrast(1.3) hue-rotate(180deg) saturate(1.4);
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 1.25rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s, font-size 0.3s, letter-spacing 0.3s;
    font-size: 1rem;
    letter-spacing: var(--letter-spacing);
}

button, input, select, textarea {
    font-size: var(--button-size);
    padding: calc(var(--button-size) * 0.5);
    letter-spacing: var(--letter-spacing);
}

.header-search button,
.chat-controls button,
.proseguir-btn,
.buscar-libro-btn,
.reserva-libro-btn,
.solicitud-libro-btn,
.sinopsis-btn,
.theme-toggle,
.accessibility-toggle {
    font-size: var(--button-size);
    padding: calc(var(--button-size) * 0.4);
    letter-spacing: var(--letter-spacing);
}

.accessibility-toggle {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 0.375rem;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
    letter-spacing: var(--letter-spacing);
}

.accessibility-toggle:hover,
.accessibility-toggle:focus {
    background: rgba(255,255,255,0.35);
    transform: scale(1.1);
    outline: 2px solid var(--text-primary);
}

[data-theme="dark"] .accessibility-toggle {
    background: rgba(0,0,0,0.2);
}

[data-theme="dark"] .accessibility-toggle:hover,
[data-theme="dark"] .accessibility-toggle:focus {
    background: rgba(0,0,0,0.35);
    outline: 2px solid var(--text-primary);
}

.accessibility-toggle.active {
    background: rgba(255,255,255,0.4) !important;
    box-shadow: 0 0 0.5rem rgba(255,255,255,0.6);
}

[data-theme="dark"] .accessibility-toggle.active {
    background: rgba(0,0,0,0.4) !important;
    box-shadow: 0 0 0.5rem rgba(255,255,255,0.4);
}

#splash {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--splash-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
    color: var(--splash-text);
    font-family: 'Arial', sans-serif;
    text-align: center;
    overflow: hidden;
    text-shadow: var(--splash-shadow);
    filter: none;
}

#splash.hidden {
    opacity: 0;
    pointer-events: none;
}

.splash-container {
    animation: fadeInContainer 1.5s ease-out;
}

#splash img {
    max-width: 250px;
    height: auto;
    margin-bottom: 20px;
    border-radius: 12px;
    animation: bounceIn 1.2s cubic-bezier(0.68, -0.55, 0.265, 1.55) 0.5s both;
    transition: transform 0.3s ease;
}

#splash img:hover,
#splash img:focus {
    transform: scale(1.05);
}

#splash h2 {
    font-size: 2.8rem;
    margin: 15px 0;
    font-weight: bold;
    animation: fadeInUp 0.8s ease-out 1s both;
    letter-spacing: 1px;
}

#splash p {
    font-size: 1.3rem;
    opacity: 0.95;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out 1.2s both;
}

@keyframes fadeInContainer {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes bounceIn {
    0% { opacity: 0; transform: scale(0.3); }
    50% { opacity: 1; transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

#app {
    display: none;
}

header {
    text-align: center;
    background-image: url('https://site.educa.madrid.org/ies.carpediem.fuenlabrada//wp-content/uploads/ies.carpediem.fuenlabrada/2024/03/carpediem-foto-inicio1920x1200c.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 20px;
    border-radius: 8px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    position: relative;
}

.theme-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
    z-index: 1100;
}

.theme-controls.active {
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.theme-toggle {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-size: 1.2em;
}

.theme-toggle:hover,
.theme-toggle:focus {
    background: rgba(255,255,255,0.3);
    outline: 2px solid var(--text-primary);
}

[data-theme="dark"] .theme-toggle {
    background: rgba(0,0,0,0.2);
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .theme-toggle:focus {
    background: rgba(0,0,0,0.3);
    outline: 2px solid var(--text-primary);
}

.header-search {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.search-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    width: 100%;
    max-width: 600px;
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    width: 100%;
}

.header-search input {
    padding: 8px;
    border: none;
    border-radius: 4px;
    width: 250px;
    max-width: 100%;
    background: rgba(255,255,255,0.9);
}

.header-search button {
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

.header-search .buscar-btn {
    background-color: var(--btn-primary);
}

.header-search .buscar-btn:hover,
.header-search .buscar-btn:focus {
    background-color: var(--btn-hover);
    outline: 2px solid var(--text-primary);
}

.header-search .reserva-btn {
    background-color: var(--btn-reserva);
}

.header-search .reserva-btn:hover,
.header-search .reserva-btn:focus {
    background-color: var(--btn-reserva-hover);
    outline: 2px solid var(--text-primary);
}

.header-search .reseña-btn {
    background-color: var(--btn-reseña);
}

.header-search .reseña-btn:hover,
.header-search .reseña-btn:focus {
    background-color: var(--btn-reseña-hover);
    outline: 2px solid var(--text-primary);
}

.header-search .solicitud-btn {
    background-color: var(--btn-solicitud);
}

.header-search .solicitud-btn:hover,
.header-search .solicitud-btn:focus {
    background-color: var(--btn-solicitud-hover);
    outline: 2px solid var(--text-primary);
}

.header-search .donaciones-btn {
    background-color: var(--btn-donaciones);
}

.header-search .donaciones-btn:hover,
.header-search .donaciones-btn:focus {
    background-color: var(--btn-donaciones-hover);
    outline: 2px solid var(--text-primary);
}

.header-search .favoritos-btn {
    background-color: var(--btn-favoritos);
    font-size: 1.2em;
}

.header-search .favoritos-btn:hover,
.header-search .favoritos-btn:focus {
    background-color: var(--btn-favoritos-hover);
    outline: 2px solid var(--text-primary);
}

.header-search .valorados-btn {
    background-color: var(--btn-favoritos);
    font-size: 1.2em;
}

.header-search .valorados-btn:hover,
.header-search .valorados-btn:focus {
    background-color: var(--btn-favoritos-hover);
    outline: 2px solid var(--text-primary);
}

main {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

section {
    flex: 1;
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    min-width: 250px;
}

#chatSection {
    flex: 2;
    min-width: 300px;
}

#seccionIzquierda h3, #seccionDerecha h3 {
    text-align: center;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.recomendados-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    height: 400px;
    overflow-y: auto;
}

.recomendados-grid img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: var(--shadow);
}

.recomendados-grid img:hover,
.recomendados-grid img:focus {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    outline: 2px solid var(--text-primary);
}

#chatMensajes {
    height: 200px;
    overflow-y: scroll;
    border: 1px solid var(--border-color);
    padding: 10px;
    margin: 10px 0;
    background-color: var(--chat-bg);
    color: var(--text-primary);
}

.mensaje {
    margin: 5px 0;
    padding: 5px;
    color: var(--text-primary);
    border-radius: 4px;
    position: relative;
}

.mensaje.user {
    background-color: var(--user-msg-bg);
    text-align: right;
}

.mensaje.bot {
    background-color: var(--bot-msg-bg);
    color: var(--bot-msg-color);
}

.mensaje.temporal {
    font-style: italic;
    color: #888;
    opacity: 0.7;
}

.mensaje.temporal.typing {
    background-color: var(--user-msg-bg);
    text-align: center;
    font-style: italic;
    color: var(--text-secondary);
    opacity: 0.8;
}

.typing-dots {
    display: inline-block;
}

.typing-dots::after {
    content: '...';
    animation: bounce 1.4s infinite ease-in-out;
}

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

[data-theme="dark"] .typing-dots::after {
    color: var(--text-primary);
}

.proseguir-btn, .buscar-libro-btn, .reserva-libro-btn, .solicitud-libro-btn, .sinopsis-btn {
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 5px;
    margin-right: 5px;
    display: inline-block;
    transition: background-color 0.3s;
}

.proseguir-btn {
    background-color: var(--btn-proseguir);
    color: white;
}

.proseguir-btn:hover,
.proseguir-btn:focus {
    background-color: var(--btn-proseguir-hover);
    outline: 2px solid var(--text-primary);
}

.buscar-libro-btn {
    background-color: var(--btn-buscar-libro);
    color: white;
}

.buscar-libro-btn:hover,
.buscar-libro-btn:focus {
    background-color: var(--btn-buscar-libro-hover);
    outline: 2px solid var(--text-primary);
}

.reserva-libro-btn {
    background-color: var(--btn-reserva);
    color: white;
}

.reserva-libro-btn:hover,
.reserva-libro-btn:focus {
    background-color: var(--btn-reserva-hover);
    outline: 2px solid var(--text-primary);
}

.solicitud-libro-btn {
    background-color: var(--btn-solicitud);
    color: white;
}

.solicitud-libro-btn:hover,
.solicitud-libro-btn:focus {
    background-color: var(--btn-solicitud-hover);
    outline: 2px solid var(--text-primary);
}

.sinopsis-btn {
    background-color: var(--btn-sinopsis);
    color: white;
}

.sinopsis-btn:hover,
.sinopsis-btn:focus {
    background-color: var(--btn-sinopsis-hover);
    outline: 2px solid var(--text-primary);
}

.favorito-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    margin-left: 5px;
    transition: transform 0.2s;
}

.favorito-btn:hover,
.favorito-btn:focus {
    transform: scale(1.1);
    outline: 2px solid var(--text-primary);
}

.favorito-btn.active {
    color: #ff0000;
}

.chat-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.chat-controls input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.chat-controls input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.chat-controls button {
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    background-color: var(--btn-primary);
    color: white;
    cursor: pointer;
}

.chat-controls button:hover,
.chat-controls button:focus {
    background-color: var(--btn-hover);
    outline: 2px solid var(--text-primary);
}

#searchModal, #adminModal, #favoritosModal, #valoradosModal, #accessibilityModal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
    pointer-events: none;
}

#searchModalContent, #adminModalContent, #favoritosModalContent, #valoradosModalContent, #accessibilityModalContent {
    background-color: var(--bg-secondary);
    margin: 5% auto;
    padding: 1.25rem;
    border: none;
    border-radius: 0.5rem;
    width: 90%;
    max-width: 37.5rem;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    color: var(--text-primary);
    box-sizing: border-box;
    position: relative;
    pointer-events: auto;
}

#accessibilityModalContent {
    max-width: 37.5rem;
}

.modal-close {
    color: var(--text-secondary);
    float: right;
    font-size: 1.75rem;
    font-weight: bold;
    cursor: pointer;
    pointer-events: auto;
}

.modal-close:hover,
.modal-close:focus {
    color: var(--text-primary);
    outline: 2px solid var(--text-primary);
}

.modal-search {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.modal-search input {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-search button {
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    background-color: var(--btn-primary);
    color: white;
    cursor: pointer;
}

.modal-search button:hover,
.modal-search button:focus {
    background-color: var(--btn-hover);
    outline: 2px solid var(--text-primary);
}

.libro-modal {
    border: 1px solid var(--border-color);
    padding: 0;
    margin: 10px 0;
    border-radius: 4px;
    background: var(--bg-secondary);
    overflow: hidden;
    display: flex;
    gap: 15px;
}

.portada-section {
    flex: 0 0 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-section {
    flex: 1;
    padding: 15px;
    line-height: 1.6;
}

.info-section p {
    margin: 8px 0;
}

.tejuelo {
    font-family: monospace;
    padding: 2px 4px;
    border-radius: 2px;
    color: black;
}

.tejuelo[data-categoria="narrativa"] { background-color: #1bd47a; }
.tejuelo[data-categoria="poesía"] { background-color: #ff48a9; }
.tejuelo[data-categoria="teatro"] { background-color: #e350de; }
.tejuelo[data-categoria="literatura inglesa"] { background-color: #d4d700; }
.tejuelo[data-categoria="enciclopedias"] { background-color: #ffaa00; }
.tejuelo[data-categoria="cómic"] { background-color: #33c5ff; }
.tejuelo[data-categoria="deportes"] { background-color: #ff8585; }
.tejuelo[data-categoria="lecturas graduadas"] { background-color: #81a1ff; color: #000000; }
.tejuelo:not([data-categoria]),
.tejuelo[data-categoria="no disponible"] { background-color: #cccccc; }

.pagination {
    text-align: center;
    margin: 10px 0;
}

.pagination button {
    background-color: var(--btn-primary);
    color: white;
    border: none;
    padding: 5px 10px;
    margin: 0 5px;
    cursor: pointer;
    border-radius: 4px;
}

.pagination button:hover,
.pagination button:focus {
    outline: 2px solid var(--text-primary);
}

.pagination button:disabled {
    background-color: var(--border-color);
    color: #ffffff;
    cursor: not-allowed;
    opacity: 0.7;
}

.pagination button.active {
    background-color: var(--text-secondary);
    font-weight: bold;
}

.pagination span {
    font-weight: bold;
}

#conteoResultadosModal {
    font-weight: bold;
    color: var(--btn-primary);
    margin-bottom: 10px;
    padding: 5px;
    background-color: #e9f5ff;
    border-radius: 4px;
}

.toast {
    position: fixed;
    bottom: 1.25rem;
    right: 1.25rem;
    background: #28a745;
    color: white;
    padding: 0.9375rem;
    border-radius: 0.25rem;
    box-shadow: var(--shadow);
    z-index: 10000;
    min-width: 18.75rem;
    animation: slideInRight 0.3s ease-out;
    role: alert;
}

.toast.error { background: #dc3545; }
.toast.warning { background: #ffc107; color: black; }

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
    white-space: nowrap;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--btn-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 6px;
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.admin-form input {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.admin-form button {
    padding: 8px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.admin-login-btn {
    background-color: var(--btn-primary);
    color: white;
}

.admin-cancel-btn {
    background-color: #666;
    color: white;
}

#contadorDia {
    text-align: center;
    font-size: 0.9em;
    color: var(--text-secondary);
    margin: 5px 0 15px 0;
}

.estrellas {
    cursor: pointer;
    font-size: 1.2em;
    user-select: none;
    position: relative;
    overflow: visible;
    display: inline-block;
    z-index: 10;
}

.estrella {
    position: relative;
    display: inline-block;
    width: 1.2em;
    height: 1.2em;
    font-size: 1.2em;
    color: #ddd;
    cursor: pointer;
    transition: color 0.2s ease, transform 0.1s ease;
    text-align: center;
    line-height: 1.2em;
    user-select: none;
}

.estrella::after {
    content: attr(data-value);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.65em;
    font-weight: bold;
    color: #333;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.estrella:hover::after,
.estrella.hover::after {
    opacity: 1;
    color: #000 !important;
}

.estrella:hover,
.estrella.seleccionada {
    color: #ffd700 !important;
}

.estrella.hover {
    color: #ffd700 !important;
}

.estrella:hover {
    transform: scale(1.2);
}

.estrella.seleccionada {
    color: #ffd700 !important;
}

.estrella.pendiente-eliminar {
    color: #dc3545 !important;
    animation: pulse 0.1s ease-in-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.promedio {
    margin-left: 8px;
    font-size: 0.9em;
    color: #555;
    font-weight: bold;
}

.accessibility-form {
    display: flex;
    flex-direction: column;
    gap: 0.9375rem;
}

.accessibility-group {
    display: flex;
    flex-direction: column;
    gap: 0.3125rem;
}

.accessibility-group label {
    font-weight: bold;
    color: var(--text-primary);
}

.accessibility-group input[type="range"] {
    width: 100%;
    margin: 0.3125rem 0;
}

.accessibility-group input[type="checkbox"] {
    margin-right: 0.3125rem;
}

.accessibility-group input[type="checkbox"]:checked {
    background-color: #28a745 !important;
    border-color: #28a745 !important;
    accent-color: #28a745;
}

.daltonism-options {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.daltonism-option {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.daltonism-option input[type="radio"] {
    margin: 0;
}

.accessibility-group button {
    padding: 0.5rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    letter-spacing: var(--letter-spacing);
}

.accessibility-group .reset-btn {
    background-color: #6c757d;
    color: white;
}

.accessibility-section {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
}

.accessibility-section h4 {
    margin-top: 0;
    color: var(--btn-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

@media (max-width: 768px) {
    main {
        flex-direction: column;
    }
    #chatSection {
        flex: none;
        order: 3;
    }
    #seccionIzquierda, #seccionDerecha {
        order: 1;
        flex: 1;
    }
    #splash h2 {
        font-size: 2rem;
    }
    #splash p {
        font-size: 1.1rem;
    }
    #splash img {
        max-width: 180px;
    }
    .search-container, .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    .header-search input,
    .header-search button {
        width: 100%;
        max-width: 300px;
    }
    #searchModalContent, #adminModalContent, #favoritosModalContent, #valoradosModalContent, #accessibilityModalContent {
        width: 95%;
        margin: 10% auto;
        padding: 0.9375rem;
    }
    .toast {
        bottom: 10px;
        right: 10px;
        left: 10px;
        min-width: auto;
    }
    .theme-controls {
        flex-direction: column;
        gap: 2px;
    }
    .chat-controls {
        flex-direction: column;
    }
    .libro-modal {
        flex-direction: column;
        text-align: center;
    }
    .portada-section {
        flex: none;
        margin-bottom: 10px;
    }
    .recomendados-grid {
        height: 300px;
    }
}

@media (prefers-reduced-motion: reduce) {
    #splash img, #splash h2, #splash p {
        animation: none !important;
        transition: none !important;
    }
    .rotativas-container img {
        transition: none;
    }
}

.portada-container {
    position: relative;
    width: 120px;
    height: 180px;
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    border-radius: 6px;
    overflow: hidden;
    background-size: 200% 200%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.portada-container.loaded {
    animation: none;
    background: none;
}

.portada-container img.default-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 6px;
    z-index: 3;
}

.portada-slider-3d {
    width: 120px;
    height: 180px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s ease;
    z-index: 3;
}

.portada-img-3d {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    backface-visibility: hidden;
    border-radius: 6px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    opacity: 0.9;
    z-index: 4;
}

.portada-img-3d.active {
    opacity: 1;
    transform: translateZ(60px);
    z-index: 10;
}

@media (prefers-reduced-motion: reduce) {
    .portada-container::after {
        animation: none;
    }
    .rotativas-container img {
        transition: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .portada-container::before {}
}

.fireworks {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1001;
}

.firework-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #ffd700;
    border-radius: 50%;
    pointer-events: none;
    animation: firework-burst 1s ease-out forwards;
}

@keyframes firework-burst {
    0% { opacity: 1; transform: scale(0) translate(0, 0); }
    100% { opacity: 0; transform: scale(1) translate(var(--dx), var(--dy)); }
}

.explosion {
    animation: explosion-shake 0.5s ease-in-out;
}

@keyframes explosion-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.firework-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #ffd700;
    border-radius: 50%;
    pointer-events: none;
    animation: firework-burst 1s ease-out forwards;
    box-shadow: 0 0 4px rgba(255, 215, 0, 0.8);
}

.firework-particle:nth-child(even) {
    background: #ff69b4;
}

@keyframes explosion-shake {
    0%, 100% { transform: translateX(0) rotate(0deg); }
    25% { transform: translateX(-8px) rotate(-2deg); }
    75% { transform: translateX(8px) rotate(2deg); }
}

.explosion .estrella {
    animation: pulse 0.2s ease-in-out;
}

.fireworks.fullscreen {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 9999 !important;
}

.conformance-note {
    text-align: center;
    font-size: 0.8em;
    color: var(--text-secondary);
    margin-top: 20px;
    padding: 10px;
    border-top: 1px solid var(--border-color);
}

.conformance-note a {
    color: var(--btn-primary);
    text-decoration: underline;
}

.conformance-note img {
    width: 20px;
    height: auto;
    vertical-align: middle;
    margin-right: 5px;
}