/* --- Variables y Estilos Globales --- */
:root {
    --primary-color: #0077c2; /* Azul del logo */
    --secondary-color: #f39200; /* Naranja del logo */
    --light-color: #ffffff;
    --dark-color: #333333;
    --bg-color: #f4f7f6;
    --border-color: #e0e0e0;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--dark-color);
    line-height: 1.6;
}

h1, h2, h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: 1.2;
}

p {
    margin-bottom: 1rem;
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Layout Principal --- */
.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--light-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
}

.main-content {
    flex-grow: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* --- Menú Lateral (Sidebar) --- */
.sidebar .logo {
    text-align: center;
    margin-bottom: 2rem;
}

.sidebar .logo img {
    max-width: 150px;
    margin-bottom: 0.5rem;
}

.sidebar .logo h2 {
    color: var(--secondary-color);
    font-size: 1.8rem;
}

.menu ul {
    list-style: none;
}

.menu li {
    margin-bottom: 0.5rem;
}

.menu-link {
    display: block;
    padding: 0.8rem 1rem;
    color: var(--dark-color);
    text-decoration: none;
    border-radius: 8px;
    transition: background-color 0.3s, color 0.3s;
}

.menu-link:hover {
    background-color: #eaf5ff;
}

.menu-link.active {
    background-color: var(--primary-color);
    color: var(--light-color);
    font-weight: 600;
}

.sidebar-footer {
    margin-top: auto;
    text-align: center;
}
.sidebar-footer img {
    max-width: 100px;
}


/* --- Contenido --- */
.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    background-color: var(--light-color);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

.intro-card {
    display: flex;
    gap: 2rem;
    align-items: center;
    background-color: var(--light-color);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.intro-card img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
}
.intro-card ul {
    list-style: none;
    padding-left: 0;
}
.intro-card li {
    padding-left: 1.5em;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%23f39200" class="bi bi-check-circle-fill" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zm-3.97-3.03a.75.75 0 0 0-1.08.022L7.477 9.417 5.384 7.323a.75.75 0 0 0-1.06 1.06L6.97 11.03a.75.75 0 0 0 1.079-.02l3.992-4.99a.75.75 0 0 0-.01-1.05z"/></svg>');
    background-repeat: no-repeat;
    background-position: left center;
    margin-bottom: 0.5rem;
}


/* --- Actividades Interactivas --- */
.interactive-activity {
    border-left: 5px solid var(--secondary-color);
}

/* Actividad: Partes del Huevo (Arrastrar y Soltar) */
#egg-diagram-activity {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}
.egg-image-container {
    position: relative;
    width: 400px;
}
#egg-labels {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.draggable {
    background-color: #eaf5ff;
    padding: 0.5rem 1rem;
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    cursor: grab;
    user-select: none;
}
.draggable.dragging {
    opacity: 0.5;
}
.drop-zone {
    position: absolute;
    width: 120px;
    height: 40px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9em;
}
.drop-zone.hovered {
    background-color: rgba(243, 146, 0, 0.2);
}
.drop-zone.correct {
    background-color: rgba(40, 167, 69, 0.7);
    border: 2px solid #28a745;
    color: white;
}

/* Actividad: Línea de Tiempo */
#timeline-activity {
    text-align: center;
}
#day-slider {
    width: 100%;
    margin: 1rem 0;
}
.timeline-content img {
    max-height: 400px;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Actividad: Cuestionario */
.quiz-question {
    margin-bottom: 1.5rem;
}
.quiz-options {
    display: flex;
    gap: 1rem;
}
.quiz-option {
    padding: 0.8rem 1.2rem;
    border: 1px solid var(--primary-color);
    background-color: var(--light-color);
    color: var(--primary-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}
.quiz-option:hover {
    background-color: var(--primary-color);
    color: var(--light-color);
}
.quiz-option.correct-ans {
    background-color: #28a745;
    border-color: #28a745;
    color: var(--light-color);
}
.quiz-option.wrong-ans {
    background-color: #dc3545;
    border-color: #dc3545;
    color: var(--light-color);
}
.quiz-option:disabled {
    cursor: not-allowed;
}
.quiz-feedback {
    margin-top: 0.5rem;
    font-weight: 600;
}
.quiz-feedback.correct { color: #28a745; }
.quiz-feedback.wrong { color: #dc3545; }

/* Actividad: Crucigrama */
#crossword-grid {
    display: grid;
    grid-template-columns: repeat(10, 30px);
    grid-template-rows: repeat(5, 30px);
    gap: 1px;
    margin-bottom: 1rem;
    background-color: #ccc;
    border: 1px solid #ccc;
}
.crossword-cell {
    width: 30px;
    height: 30px;
}
.crossword-cell input {
    width: 100%;
    height: 100%;
    text-align: center;
    text-transform: uppercase;
    border: none;
    font-size: 1rem;
    padding: 0;
}
.crossword-cell input.correct {
    background-color: #d4edda;
}
.crossword-cell input.incorrect {
    background-color: #f8d7da;
}
.crossword-clues {
    font-size: 0.9em;
    margin-bottom: 1rem;
}

/* --- Glosario --- */
.glossary-search-container {
    margin-bottom: 1.5rem;
}
#glossary-search {
    width: 100%;
    padding: 0.8rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}
.glossary-entry {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s;
}
.glossary-entry.hidden {
    display: none;
}
.glossary-entry dt {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.1rem;
}
.glossary-entry dd {
    margin-left: 1.5rem;
    margin-top: 0.25rem;
}

/* --- Botones Genéricos --- */
button {
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
}
#reset-egg-activity, #check-crossword {
    background-color: var(--secondary-color);
    color: var(--light-color);
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 1rem;
}
#reset-egg-activity:hover, #check-crossword:hover {
    background-color: #d97d00;
}


/* --- Estilos para la Sección de Conceptos Básicos --- */

/* Card de Comparación */
.comparison-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    padding: 0;
}
.comparison-card .column {
    padding: 1.5rem;
}
.comparison-card .column:first-child {
    border-right: 1px solid var(--border-color);
}
.comparison-card ul {
    list-style-type: none;
    padding-left: 0;
}
.comparison-card li {
    padding-left: 1.5em;
    margin-bottom: 0.5rem;
    background-repeat: no-repeat;
    background-position: left 0.2em;
}
.comparison-card .column:first-child li {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%23f39200" class="bi bi-egg-fill" viewBox="0 0 16 16"><path d="M14 10a6 6 0 0 1-12 0C2 5.686 5 0 8 0s6 5.686 6 10z"/></svg>');
}
.comparison-card .column:last-child li {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%230077c2" class="bi bi-power" viewBox="0 0 16 16"><path d="M7.5 1v7h1V1h-1z"/><path d="M3 8.812a4.999 4.999 0 0 1 2.578-4.375l-.485-.874A6 6 0 1 0 11 3.616l-.501.865A5 5 0 1 1 3 8.812z"/></svg>');
}

/* Acordeón Interactivo */
.accordion {
    margin-top: 1.5rem;
}
.accordion-item {
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}
.accordion-button {
    width: 100%;
    background-color: #f8f9fa;
    color: var(--dark-color);
    padding: 1rem;
    text-align: left;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: background-color 0.3s;
    position: relative;
}
.accordion-button::after {
    content: '+';
    font-size: 1.5rem;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    transition: transform 0.3s;
    color: var(--primary-color);
}
.accordion-button.active::after {
    content: '−';
    transform: translateY(-50%);
}
.accordion-button:hover, .accordion-button.active {
    background-color: #eaf5ff;
}
.accordion-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
    background-color: var(--light-color);
    padding: 0 1rem;
}
.accordion-panel p, .accordion-panel ul {
    margin: 1rem 0;
}

/* Conversor de Temperatura */
.temp-converter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.temp-converter input {
    width: 100px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
}
.temp-converter span {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary-color);
}


/* --- Responsividad --- */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .main-content {
        padding: 1.5rem;
    }
    .intro-card {
        flex-direction: column;
    }
    #egg-diagram-activity {
        flex-direction: column;
    }
    .quiz-options {
        flex-direction: column;
    }
    .comparison-card {
        grid-template-columns: 1fr;
    }
    .comparison-card .column:first-child {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}