styles.css

/* styles.css */
:root {
    --bg-color: #f4f4f4;
    --text-color: #333;
    --container-bg: #fff;
    --option-bg: #f9f9f9;
    --option-border: #ddd;
    --option-selected-bg: #d1e7fd;
    --option-selected-border: #7abaff;
    --progress-bg: #e0e0e0;
    --time-label-bg: rgba(255, 255, 255, 0.9);
    --input-bg: #fff;
    --input-border: #ccc;
    --option-hover-bg: #e9e9e9;
    --context-bg: #f8f9fa;
    --context-border: #dee2e6;
    --selected-display-bg: #e9ecef;
    --selected-display-border: #ced4da;
    --correct-selection-bg: #c3e6cb;
    --correct-selection-color: #155724;
    --correct-selection-border: #b1dfbb;
    --incorrect-selection-bg: #f5c6cb;
    --incorrect-selection-color: #721c24;
    --incorrect-selection-border: #f1b0b7;
    --partial-selection-bg: #fff3cd;
    --partial-selection-color: #856404;
    --partial-selection-border: #ffe8a1;
    --unselected-correct-bg: #e6ffed;
    --unselected-correct-color: #1c7430;
    --unselected-correct-border: #a3d3ab;
    --missed-correct-bg: #f0fff4;
    --status-info-bg: #d1ecf1;
    --status-info-color: #0c5460;
    --status-info-border: #bee5eb;
    --status-success-bg: #d4edda;
    --status-success-color: #155724;
    --status-success-border: #c3e6cb;
    --status-error-bg: #f8d7da;
    --status-error-color: #721c24;
    --status-error-border: #f5c6cb;
    --subject-color: #d63384;
    --modal-bg: #fff;
}

body.dark-mode {
    --bg-color: #1e1e1e;
    --text-color: #f0f0f0;
    --container-bg: #2d2d2d;
    --option-bg: #3a3a3a;
    --option-border: #555;
    --option-selected-bg: #37474f;
    --option-selected-border: #607d8b;
    --progress-bg: #555;
    --time-label-bg: rgba(0,0,0,0.7);
    --input-bg: #353535;
    --input-border: #666;
    --option-hover-bg: #444;
    --context-bg: #2c2c2c;
    --context-border: #444;
    --selected-display-bg: #333;
    --selected-display-border: #555;
    --correct-selection-bg: #355c3a;
    --correct-selection-color: #d4f5dd;
    --correct-selection-border: #417b46;
    --incorrect-selection-bg: #5c3535;
    --incorrect-selection-color: #f5d7d7;
    --incorrect-selection-border: #875252;
    --unselected-correct-bg: #2d4834;
    --unselected-correct-color: #bfe9c7;
    --unselected-correct-border: #3f664b;
    --missed-correct-bg: #1e3b2a;
    --status-info-bg: #0d3c4d;
    --status-info-color: #d1ecf1;
    --status-info-border: #0a2936;
    --status-success-bg: #244530;
    --status-success-color: #d4edda;
    --status-success-border: #173c25;
    --status-error-bg: #632b2b;
    --status-error-color: #f8d7da;
    --status-error-border: #7b3535;
    --partial-selection-bg: #66550d;
    --partial-selection-color: #fff2b3;
    --partial-selection-border: #b1922c;
    --modal-bg: #2a2a2a;
    --subject-color: #6c31ca;
}

html {
    box-sizing: border-box;
    font-size: 16px; /* Base font size for rem units */
}

*, *::before, *::after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background-color: var(--bg-color);
    line-height: 1.6;
    color: var(--text-color);
    display: flex; /* Para permitir que el quiz-container crezca */
    flex-direction: column; /* Apila el menú y el contenedor del quiz */
    min-height: 100vh; /* Asegura que el cuerpo ocupe al menos toda la altura de la vista */
}

/* --- Encabezado y Sidebar --- */
.main-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.5rem 1rem;
    min-height: 48px; /* Mantiene la altura estable */
    background-color: var(--container-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
    z-index: 99;
}

#open-sidebar {
    /* styles moved to .sidebar-toggle */
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
}

.sidebar-toggle svg {
    width: 24px;
    height: 24px;
}

#collection-title {
    font-weight: bold;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 240px;
    height: 100%;
    background-color: #222;
    color: #fff;
    padding-top: 0.5rem;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 100;
    overflow-y: auto;
}

.sidebar.open {
    transform: translateX(0);
}

/* Desplazar el encabezado cuando el sidebar está abierto en pantallas grandes */
@media (min-width: 769px) {
body.sidebar-open .main-header {
    transform: translateX(240px);
}

body.sidebar-open {
    overflow: hidden; /* Evita barras de desplazamiento al mostrar el sidebar */
}
}

.sidebar .menu-section {
    border-bottom: 1px solid #444;
    padding: 0.5rem 0;
}

.sidebar .menu-section:last-child {
    border-bottom: none;
}

.sidebar button,
.sidebar a {
    display: block;
    width: 100%;
    background: none;
    border: none;
    color: inherit;
    padding: 0.5rem 1rem;
    text-align: left;
    font: inherit;
    cursor: pointer;
    text-decoration: none;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.menu-icon svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.sidebar button:hover,
.sidebar a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.close-sidebar {
    display: none;
    text-align: left;
    color: #fff;
}

body.sidebar-open .close-sidebar {
    display: block;
}

body.sidebar-open #open-sidebar {
    display: none;
}

.modal-content select {
    padding: 0.55em 0.8em;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    border-radius: 4px;
    font-size: 0.9rem;
}


.quiz-container {
    background-color: var(--container-bg);
    padding: 1.5rem; /* Usar rem para padding */
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.07);
    width: 90%;
    max-width: 700px;
    margin: 1.5rem auto; /* Margen superior/inferior y centrado */
    flex-grow: 1; /* Permite que este contenedor ocupe el espacio disponible */
    border: 3px solid transparent;
    transition: border-color 0.3s ease-in-out;
}

.quiz-container.correct-answer-border {
    border-color: #28a745;
}
.quiz-container.incorrect-answer-border {
    border-color: #dc3545;
    border-width: 4px;
}

.answer-banner {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.error-banner {
    background-color: #df4759;
    color: #fff;
}

.warning-icon {
    margin-right: 0.5rem;
    font-weight: bold;
}

#quiz h2 { /* Pregunta */
    margin-top: 0;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    line-height: 1.4;
}

.reps-remaining,
.questions-remaining {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 0.75rem;
}

.written-answer-input {
    width: 100%;
    padding: 0.6rem 0.8rem;
    font-size: 1rem;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    border-radius: 4px;
    margin-bottom: 1rem;
}

.option {
    display: flex;
    align-items: center;
    background-color: var(--option-bg);
    border: 1px solid var(--option-border);
    padding: 0.4rem 1rem;
    margin-bottom: 0.75rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
    font-size: 1rem; /* Buen tamaño para opciones */
    color: var(--text-color); /* Asegurar que el texto de la opción sea visible */
}

.option:hover {
    background-color: var(--option-hover-bg);
    border-color: var(--option-border);
}

.option.selected {
    background-color: var(--option-selected-bg);
    border-color: var(--option-selected-border);
}

.option.disabled {
    cursor: not-allowed;
    opacity: 0.7;
    background-color: var(--option-hover-bg) !important;
    border-color: var(--option-border) !important;
}

.option.hidden {
    display: none !important;
}

.key-indicator {
    font-weight: bold;
    margin-right: 0.8rem;
    min-width: 1.5em; /* Basado en font-size del indicador */
    text-align: center;
    background-color: var(--selected-display-bg);
    color: var(--text-color);
    padding: 0.2em 0.5em;
    border-radius: 3px;
    font-size: 0.85rem;
}

.key-indicator.space {
    font-family: monospace;
    font-size: 1rem;
}

.option-text {
    flex-grow: 1;
}

.action-buttons-container {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.action-buttons-container.hidden {
    display: none !important;
}

.confirm-button,
.skip-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s ease;
    flex-grow: 1;
    flex-basis: calc(50% - 0.4rem); /* Dos botones por fila si caben */
}

.confirm-button { background-color: #28a745; color: #000; }
.confirm-button:hover { background-color: #218838; }
.confirm-button:disabled { background-color: #a0d1a9; cursor: not-allowed; }

.skip-button { background-color: #ffc107; color: #000; }
.skip-button:hover { background-color: #e0a800; }
.skip-button:disabled { background-color: #ffe082; cursor: not-allowed; }

.next-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s ease;
    background-color: #007bff;
    color: #000;
    margin-top: 1rem;
    width: 100%;
}
.next-button:hover { background-color: #0056b3; }

.button-text {
    margin-left: 0.5rem;
}

/* Fase de explicación/resultado */
.correct-answer-info, /* No usado, pero mantenido */
.context-info,
.selected-answers-display,
.missed-correct-answers-display {
    margin-top: 1.25rem;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    line-height: 1.5;
    font-size: 0.95rem;
}

.context-info {
    background-color: var(--context-bg);
    border: 1px solid var(--context-border);
    border-left-width: 4px;
    border-left-color: #17a2b8;
    color: var(--text-color);
    word-wrap: break-word;
    margin-bottom: 1rem;
}

.selected-answers-display,
.missed-correct-answers-display {
    background-color: var(--selected-display-bg);
    border: 1px solid var(--selected-display-border);
    margin-bottom: 1rem;
}
.selected-answers-display p,
.missed-correct-answers-display p {
    margin-top: 0;
    margin-bottom: 0.6rem;
    font-weight: bold;
}

.selected-option-display,
.unselected-correct-option {
    padding: 0.3rem 0.6rem;
    margin-bottom: 0.3rem;
    border-radius: 4px;
    display: block; /* Para que cada una ocupe su línea */
    margin-right: 0; /* No necesario si son display block */
    border: 1px solid transparent;
}
.partial-correct-selection {
    background-color: var(--partial-selection-bg);
    color: var(--partial-selection-color);
    border-color: var(--partial-selection-border);
}

.correct-selection { background-color: var(--correct-selection-bg); color: var(--correct-selection-color); border-color: var(--correct-selection-border); }
.incorrect-selection { background-color: var(--incorrect-selection-bg); color: var(--incorrect-selection-color); border-color: var(--incorrect-selection-border); text-decoration: line-through; }
.unselected-correct-option { background-color: var(--unselected-correct-bg); color: var(--unselected-correct-color); border-color: var(--unselected-correct-border); }
.missed-correct-answers-display { background-color: var(--missed-correct-bg); border-color: var(--correct-selection-border); }

.status-message {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.25rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 101;
    display: none;
    font-size: 0.9rem;
    text-align: center;
    max-width: 90%;
}
.status-message.info { background-color: var(--status-info-bg); color: var(--status-info-color); border: 1px solid var(--status-info-border); }
.status-message.success { background-color: var(--status-success-bg); color: var(--status-success-color); border: 1px solid var(--status-success-border); }
.status-message.error { background-color: var(--status-error-bg); color: var(--status-error-color); border: 1px solid var(--status-error-border); }

.completed-message { color: #28a745; text-align: center; font-size: 1.6rem; }
.multi-select-info { font-style: italic; color: var(--text-color); opacity: 0.8; margin-bottom: 1rem; font-size: 0.9rem; }
.error-message { color: #dc3545; font-weight: bold; }

/* --- Media Queries para Responsividad --- */
@media (max-width: 768px) { /* Tablets y móviles grandes en landscape */
    html {
        font-size: 15px; /* Ligeramente más pequeño si es necesario, o mantener 16px */
    }
    .quiz-container {
        width: 95%;
        padding: 1.25rem;
        margin: 1.25rem auto;
    }
    #quiz h2 { font-size: 1.3rem; }
    .modal-content select { font-size: 0.85rem; padding: 0.45em 0.7em; }
}

@media (max-width: 480px) { /* Móviles en portrait */
    html {
        font-size: 14px; /* Aumentar ligeramente la base para móviles para que no sea tan pequeño */
                         /* El valor original era 14px, si se sigue viendo pequeño, probar con 15px o 16px */
    }


    .quiz-container {
        width: 100%;
        margin: 0; /* Sin margen lateral */
        padding: 1rem;
        border-radius: 0; /* Opcional: quitar bordes redondeados en pantalla completa */
        box-shadow: none; /* Opcional */
        border-left: none;
        border-right: none;
    }

    #quiz h2 {
        font-size: 1.2rem; /* Tamaño de pregunta legible */
        line-height: 1.35;
        margin-bottom: 1rem;
    }

    .option {
        padding: 0.9rem 0.75rem; /* Más área táctil */
        font-size: 0.95rem; /* Texto de opción más grande */
        margin-bottom: 0.6rem;
    }
    .key-indicator {
        font-size: 0.8rem;
        margin-right: 0.6rem;
    }

    .action-buttons-container {
        flex-direction: column; /* Botones de acción apilados */
    }
    .confirm-button,
    .skip-button {
        width: 100%; /* Ocupan todo el ancho */
        flex-basis: auto; /* Resetear flex-basis */
        font-size: 0.95rem;
    }
    .next-button {
        font-size: 0.95rem;
    }

    .status-message {
        font-size: 0.85rem;
        padding: 0.6rem 1rem;
    }

    .sidebar {
        width: 80%;
    }
}

/* --- Estilos del Modal de Configuración --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
}

.modal-overlay:not(.hidden) {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease;
}

.modal-content {
    background-color: var(--modal-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    width: 90%;
    max-width: 500px;
    position: relative;
    transform: translateY(-20px);
    transition: transform 0.3s ease-out;
}

.modal-overlay:not(.hidden) .modal-content {
    transform: translateY(0);
}

.modal-content h2 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--text-color);
    text-align: center;
}

.close-modal-x {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 2rem;
    color: #000;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}
.close-modal-x:hover {
    color: #333;
}

.config-group {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--option-border);
}
.config-group:last-of-type {
    border-bottom: none;
    margin-bottom: 1rem;
}
.config-group-title {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 0.8rem;
    color: #007bff;
}

.config-option {
    margin-bottom: 1rem;
}
.config-option:last-child {
    margin-bottom: 0;
}

.config-option label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.config-option input[type="number"],
.config-option input[type="text"],
.config-option select {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    border-radius: 4px;
    font-size: 0.95rem;
    box-sizing: border-box;
}
.config-option input[type="number"] {
    width: auto; /* Ajustar para números */
    min-width: 80px;
    max-width: 120px;
}

.config-option small {
    display: block;
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.8;
    margin-top: 0.25rem;
}

.config-option.checkbox-option {
    display: flex;
    align-items: center;
}
.config-option.checkbox-option input[type="checkbox"] {
    margin-right: 0.5rem;
    width: auto;
    height: 1.2em; /* Ajustar tamaño del checkbox */
    width: 1.2em;
}
.config-option.checkbox-option label {
    margin-bottom: 0;
    font-weight: normal;
}

.modal-actions {
    margin-top: 1.5rem;
    display: flex;
    justify-content: flex-end; /* Alinea botones a la derecha */
    gap: 0.8rem;
    flex-wrap: wrap;
}

.modal-actions .button-primary,
.modal-actions .button-secondary {
    padding: 0.7em 1.2em;
    font-size: 0.95rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.modal-actions .button-primary {
    background-color: #007bff;
    color: #000;
}
.modal-actions .button-primary:hover {
    background-color: #0056b3;
}

.modal-actions .button-secondary {
    background-color: #6c757d;
    color: #000;
}
.modal-actions .button-secondary:hover {
    background-color: #5a6268;
}

/* Responsividad del modal */
@media (max-width: 480px) {
    .modal-content {
        padding: 1.5rem;
        width: 95%;
        max-height: 90vh; /* Evitar que sea más alto que la pantalla */
        overflow-y: auto; /* Permitir scroll si el contenido es mucho */
    }
    .modal-content h2 {
        font-size: 1.3rem;
    }
    .modal-actions {
        flex-direction: column; /* Botones apilados en móviles */
    }
    .modal-actions .button-primary,
    .modal-actions .button-secondary {
        width: 100%; /* Botones ocupan todo el ancho */
    }
    .config-option input[type="number"] {
        width: 100%; /* Inputs numéricos también ocupan todo el ancho */
        max-width: none;
    }
}

.hidden { /* Ya debería existir, pero asegurar que esté y tenga !important si es necesario */
    display: none !important;
}

/* Barra de tiempo restante al pie */
.time-progress {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--progress-bg);
    overflow: hidden;
    z-index: 99;
}

.time-bar {
    height: 100%;
    background: linear-gradient(90deg, #4caf50, #2e7d32);
    width: 0%;
    transition: width 0.3s ease;
}

.time-remaining {
    position: fixed;
    bottom: 8px;
    right: 10px;
    font-size: 0.75rem;
    color: var(--text-color);
    background: var(--time-label-bg);
    padding: 2px 6px;
    border-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

/* --- Estilos para la pantalla de inicio --- */
.home-container {
    width: 90%;
    max-width: 1000px;
    margin: 2rem auto;
    text-align: center;
}

.home-carousel {
    display: flex;
    overflow-x: auto;
    gap: 1rem;
    padding: 1rem 0;
}

.collection-card {
    flex: 0 0 auto;
    background-color: var(--container-bg);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    padding: 1rem;
    width: 220px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.collection-card:hover {
    border-color: var(--option-selected-border);
}

.collection-subject {
    font-weight: bold;
    color: var(--subject-color);
    display: block;
    margin-bottom: 0.5rem;
}

.collection-subject-inline {
    font-weight: bold;
    color: var(--subject-color);
    margin-right: 0.5rem;
}