/* ============================================
   Biblia Estudio — Estilos Globales
   Diseño accesible para personas mayores
   ============================================ */

:root {
    --color-bg: #f8f3eb;
    --color-text: #2a1a0a;
    --color-heading: #3a2510;
    --color-gold: #c8a44e;
    --color-gold-dark: #b8943e;
    --color-brown-dark: #2d1f14;
    --color-brown: #4a3425;
    --color-brown-light: #5c4a34;
    --color-cream: #f0e6d3;
    --color-cream-dark: #e8dcc8;
    --color-border: #d4c8b4;
    --color-card-bg: #fff;
    --color-success: #28a745;
    --color-success-light: #c8e6c9;
    --color-danger: #d9534f;
    --color-info: #4a90d9;
    --color-muted: #888;
    --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: Georgia, 'Times New Roman', serif;
    --max-width: 1300px;
}

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

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    font-size: 18px;
    line-height: 1.6;
}

/* ---- Header ---- */
header {
    background: linear-gradient(135deg, var(--color-brown-dark), var(--color-brown));
    color: var(--color-cream);
    padding: 1.2rem 2rem;
    box-shadow: 0 3px 10px rgba(0,0,0,0.3);
}
header h1 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    color: var(--color-gold);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}
header h1 a {
    color: inherit;
    text-decoration: none;
}
header .subtitle {
    font-size: 1rem;
    color: var(--color-cream-dark);
    margin-bottom: 1rem;
    font-style: italic;
}

/* ---- Navigation ---- */
nav { display: flex; gap: 0.6rem; flex-wrap: wrap; }
nav a {
    color: var(--color-cream-dark);
    text-decoration: none;
    padding: 0.7rem 1.4rem;
    border-radius: 6px;
    transition: all 0.2s;
    font-size: 1.15rem;
    font-weight: 500;
    border: 2px solid transparent;
    cursor: pointer;
}
nav a:hover {
    background: rgba(200,164,78,0.25);
    color: #fff;
    border-color: rgba(200,164,78,0.4);
}
nav a.active {
    background: var(--color-gold);
    color: var(--color-brown-dark);
    font-weight: bold;
    border-color: var(--color-gold);
}

/* ---- Main ---- */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem 2rem;
}
main > h2, .section-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--color-heading);
    margin-bottom: 1.2rem;
    padding-bottom: 0.6rem;
    border-bottom: 3px solid var(--color-gold);
}

/* ---- Sections ---- */
.section { display: none; }
.section.active { display: block; }

/* ---- Tabs ---- */
.tabs { display: flex; gap: 0.6rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.tab-btn {
    padding: 0.8rem 1.6rem;
    background: #e8dfd3;
    border: 3px solid #b8a88e;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    font-size: 1.1rem;
    color: #4a3a28;
    transition: all 0.2s;
    font-weight: 600;
}
.tab-btn:hover { background: #d4c8b4; border-color: #9a8a70; }
.tab-btn.active {
    background: #fff;
    color: var(--color-brown-dark);
    font-weight: bold;
    border-color: var(--color-gold);
    border-bottom-color: #fff;
}

/* ---- Cards ---- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}
.card {
    background: var(--color-card-bg);
    border-radius: 12px;
    padding: 1.8rem;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    border-left: 6px solid var(--color-gold);
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}
.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}
.card h3 {
    font-family: var(--font-heading);
    color: var(--color-heading);
    margin-bottom: 0.6rem;
    font-size: 1.4rem;
}
.card p {
    font-size: 1.1rem;
    color: var(--color-brown-light);
    line-height: 1.6;
}
.card.disabled {
    opacity: 0.5;
    cursor: default;
    border-left-color: #ccc;
}
.card.disabled:hover {
    transform: none;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}
.card .badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-top: 0.5rem;
}
.badge-active { background: var(--color-success-light); color: #1b5e20; }
.badge-soon { background: #e0e0e0; color: #666; }

/* ---- Intro / Instructions ---- */
.intro-text {
    font-size: 1.25rem;
    line-height: 1.7;
    color: #3a2a1a;
    max-width: 750px;
    margin-bottom: 1rem;
}
.instructions {
    background: #fff;
    border-radius: 10px;
    padding: 1.3rem 1.8rem;
    margin: 1.5rem 0;
    border-left: 6px solid var(--color-info);
    font-size: 1.1rem;
    line-height: 1.7;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}
.instructions h3 {
    color: var(--color-brown-dark);
    margin-bottom: 0.6rem;
    font-size: 1.3rem;
}

/* ---- Activity Icons ---- */
.activity-icons {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}
.activity-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
    color: var(--color-brown-light);
    background: var(--color-bg);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
}

/* ---- Breadcrumb ---- */
.breadcrumb {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    font-size: 1rem;
    color: var(--color-muted);
    margin-bottom: 1rem;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--color-info);
    text-decoration: none;
}
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: #ccc; }

/* ---- Footer ---- */
footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--color-muted);
    font-size: 1rem;
    margin-top: 2rem;
    border-top: 2px solid var(--color-border);
}

/* ---- Hidden mobile input ---- */
#mobile-input {
    position: fixed;
    top: -100px;
    left: 0;
    width: 1px;
    height: 1px;
    opacity: 0;
    border: none;
    font-size: 16px;
    z-index: -1;
}

/* ---- Testament Section Headers ---- */
.testament-header {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    color: var(--color-brown);
    margin: 2rem 0 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid var(--color-border);
}
.testament-header:first-of-type { margin-top: 1rem; }

/* ---- Section Links (Book Page Nav) ---- */
.section-links {
    display: flex;
    gap: 1.2rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}
.section-link-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: var(--color-card-bg);
    border-radius: 12px;
    padding: 1.5rem 2rem;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    border: 2px solid var(--color-border);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    min-width: 180px;
    flex: 1;
}
.section-link-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
    border-color: var(--color-gold);
}
.section-link-icon {
    font-size: 2.4rem;
    margin-bottom: 0.5rem;
}
.section-link-label {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--color-heading);
}
.section-link-desc {
    font-size: 0.95rem;
    color: var(--color-muted);
    margin-top: 0.3rem;
}

/* ---- Chapter Search Filter ---- */
.chapter-filter {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.chapter-filter label {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-brown);
    white-space: nowrap;
}
.chapter-filter input {
    flex: 1;
    max-width: 400px;
    padding: 0.7rem 1rem;
    font-size: 1.1rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-card-bg);
    color: var(--color-text);
    transition: border-color 0.2s;
}
.chapter-filter input:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(200,164,78,0.2);
}

/* ---- Chapter Cards (Book Page) ---- */
.chapters-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.chapter-card {
    background: var(--color-card-bg);
    border-radius: 10px;
    padding: 1.2rem 1.5rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    border-left: 5px solid var(--color-gold);
    transition: box-shadow 0.2s;
}
.chapter-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}
.chapter-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}
.chapter-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    min-width: 42px;
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    color: #fff;
    font-weight: bold;
    font-size: 1.1rem;
    border-radius: 50%;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
}
.chapter-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-heading);
    margin: 0;
}
.chapter-summary {
    font-size: 1.05rem;
    color: var(--color-brown-light);
    line-height: 1.6;
    margin-bottom: 0.6rem;
}
.chapter-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}
.chapter-verses {
    font-size: 0.9rem;
    color: var(--color-muted);
    font-style: italic;
}
.chapter-quiz-link {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-gold-dark);
    text-decoration: none;
    padding: 0.3rem 0.8rem;
    border: 2px solid var(--color-gold);
    border-radius: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}
.chapter-quiz-link:hover {
    background: var(--color-gold);
    color: #fff;
}

/* ---- Chapter Navigation (Quiz Pages) ---- */
.chapter-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 2px solid var(--color-border);
    gap: 0.5rem;
}
.nav-btn {
    color: var(--color-gold-dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--color-gold);
    border-radius: 8px;
    transition: all 0.2s;
}
.nav-btn:hover {
    background: var(--color-gold);
    color: #fff;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
    header { padding: 1rem; }
    header h1 { font-size: 1.6rem; }
    nav a { padding: 0.5rem 0.8rem; font-size: 1rem; }
    main { padding: 1rem; }
    main > h2, .section-title { font-size: 1.4rem; }
    .tab-btn { padding: 0.6rem 1rem; font-size: 1rem; }
    .section-links { flex-direction: column; }
    .section-link-card { flex-direction: row; gap: 1rem; padding: 1rem 1.5rem; min-width: auto; }
    .section-link-icon { font-size: 1.8rem; margin-bottom: 0; }
    .section-link-card { text-align: left; align-items: flex-start; }
    .chapter-filter { flex-direction: column; align-items: stretch; }
    .chapter-filter input { max-width: none; }
}

@media (max-width: 500px) {
    nav { gap: 0.3rem; }
    nav a { padding: 0.4rem 0.5rem; font-size: 0.9rem; }
    .card-grid { grid-template-columns: 1fr; }
    .chapter-card { padding: 1rem; }
    .chapter-card-header { gap: 0.7rem; }
    .chapter-number { width: 36px; height: 36px; min-width: 36px; font-size: 0.95rem; }
    .chapter-title { font-size: 1.1rem; }
    .chapter-meta { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .section-link-card { padding: 0.8rem 1rem; }
}