/* Grantha Index - Ghibli Inspired Theme */

:root {
    /* Ghibli Palette */
    --bg-parchment: #FAF3E8;
    --bg-card: #FFFFFF;
    --bg-card-hover: #FFF8F0;
    
    --text-primary: #2C2418;
    --text-body: #4A3F35;
    --text-muted: #8B7E6F;
    
    --accent-terracotta: #C45D3E;
    --accent-amber: #D4A54A;
    --accent-forest: #3D5A47;
    --accent-indigo: #5B5B8A;
    --accent-sage: #7A9B6D;
    --accent-clay: #A67B5B;
    --accent-rose: #B5736A;
    
    --border-soft: #E8DFD2;
    --timeline-line: #D4C5B0;
    --shadow-warm: rgba(139, 115, 85, 0.08);
    --shadow-warm-hover: rgba(139, 115, 85, 0.15);
    
    /* Layout */
    --container-width: 1100px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-parchment);
    color: var(--text-body);
    line-height: 1.6;
    padding-bottom: 4rem;
}

/* ================== Typography ================== */
.hero-title {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.title-en {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    font-size: 2.5rem;
}

.subtitle {
    font-family: 'Playfair Display', serif;
    font-size: 1.25rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 0.5rem;
}

.era-header-clickable {
    cursor: pointer;
    user-select: none;
    transition: opacity 0.2s;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.era-header-clickable:hover {
    opacity: 0.8;
}

.era-title {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    padding-left: 24px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.era-chevron {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
    transition: transform 0.2s ease;
}

.era-insight {
    font-size: 0.95rem;
    color: var(--accent-clay);
    margin-top: 0;
    margin-bottom: 0;
    padding-left: 24px;
    font-weight: 500;
}

.book-title-en {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.book-title-sa {
    font-family: 'Noto Serif Devanagari', serif;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

/* ================== Header & Layout ================== */
.site-header {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 1rem 2rem;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border-soft);
}

.header-content {
    position: relative;
    z-index: 2;
}

/* ================== Typographic Background ================== */
.typographic-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
    opacity: 0.02; /* Extremely subtle watermark */
    user-select: none;
}
.bg-phrase {
    position: absolute;
    font-family: 'Noto Serif Devanagari', 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    animation: drift 60s linear infinite;
}
.bg-phrase:nth-child(even) {
    animation-direction: alternate-reverse;
    font-size: 1.8rem;
    color: var(--accent-terracotta);
}
.bg-phrase:nth-child(3n) {
    font-size: 3.2rem;
    color: var(--accent-amber);
    animation-duration: 90s;
}
@keyframes drift {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(30px) translateY(-15px); }
}

main {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

/* ================== Stats & Controls ================== */
.stats-ribbon {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-soft);
}

.controls-bar {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 2rem;
    flex-wrap: wrap;
}

.search-filter-group {
    flex: 1;
    min-width: 300px;
}

.search-input {
    width: 100%;
    max-width: 400px;
    padding: 10px 16px;
    border: 1px solid var(--border-soft);
    border-radius: 8px;
    background: var(--bg-card);
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-body);
    transition: all 0.2s;
    margin-bottom: 1rem;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-amber);
    box-shadow: 0 0 0 3px rgba(212, 165, 74, 0.15);
}

/* Toggles */
.prominent-toggles-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.large-toggles {
    display: flex;
    gap: 4px;
    background: rgba(232, 223, 210, 0.6);
    padding: 4px;
    border-radius: 8px;
    align-items: center;
}

.toggle-pill {
    padding: 6px 16px;
    border: none;
    background: transparent;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Playfair Display', serif;
}

.toggle-pill.active {
    background: var(--bg-card);
    color: var(--accent-terracotta);
    box-shadow: 0 4px 8px var(--shadow-warm);
}

.proposer-select {
    padding: 8px 16px;
    border: 1px solid var(--border-soft);
    background: var(--bg-card);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-body);
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
}

/* ================== Grid & Era Sections ================== */
.era-section {
    margin-bottom: 4rem;
    position: relative;
}

.era-section::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 40px;
    bottom: -40px;
    width: 2px;
    background: var(--timeline-line);
}

.era-section:last-child::before {
    bottom: 0;
}

.era-marker {
    position: absolute;
    left: 0;
    top: 8px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-amber);
    box-shadow: 0 0 0 4px var(--bg-parchment);
    z-index: 2;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
    padding-left: 24px;
}

/* ================== Work Cards ================== */
.work-card {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 4px 12px var(--shadow-warm);
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.work-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px var(--shadow-warm-hover);
    background: var(--bg-card-hover);
}

.work-card.expanded {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.work-meta-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.genre-badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
}

/* Genre Colors */
.genre-veda-samhita, .genre-upanishad { background-color: var(--accent-forest); }
.genre-itihasa { background-color: var(--accent-sage); }
.genre-gita { background-color: var(--accent-amber); color: var(--text-primary); }
.genre-mahapurana { background-color: var(--accent-clay); }
.genre-darshana, .genre-dharmashastra, .genre-science { background-color: var(--accent-indigo); }
.genre-arts, .genre-sangam, .genre-bhakti { background-color: var(--accent-rose); }
.genre-default { background-color: var(--text-muted); }

/* Genre Tooltip */
.genre-badge-wrapper {
    position: relative;
    display: inline-block;
}

.genre-tooltip {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    left: 0;
    top: 130%;
    z-index: 50;
    background: var(--text-primary);
    color: var(--bg-parchment);
    padding: 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    width: 280px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.2);
    transition: all 0.2s;
    pointer-events: none;
    text-transform: none;
    letter-spacing: normal;
    font-weight: normal;
}

.genre-badge-wrapper:hover .genre-tooltip {
    visibility: visible;
    opacity: 1;
    top: 120%;
}

.tooltip-title { font-weight: 600; color: var(--accent-amber); margin-bottom: 4px; font-size: 0.95rem; }
.tooltip-ety { color: var(--border-soft); font-style: italic; margin-bottom: 8px; font-size: 0.8rem; }

/* Date Bar Visualization */
.date-bar-container {
    height: 6px;
    background: var(--border-soft);
    border-radius: 3px;
    margin: 1rem 0;
    position: relative;
}

.date-bar-fill {
    position: absolute;
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent-amber), var(--accent-terracotta));
    transition: all 0.5s ease;
}

.date-bar-fill.imputed {
    background: repeating-linear-gradient(
      45deg,
      var(--text-muted),
      var(--text-muted) 4px,
      var(--border-soft) 4px,
      var(--border-soft) 8px
    );
}

.date-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.work-summary {
    font-size: 0.95rem;
    color: var(--text-body);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.work-etymology {
    font-size: 0.85rem;
    color: var(--accent-clay);
    font-style: italic;
    border-top: 1px dashed var(--border-soft);
    padding-top: 0.75rem;
}

.digital-readiness {
    display: flex;
    gap: 4px;
    margin-top: auto;
    padding-top: 1rem;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--border-soft);
}

.dot.active {
    background: var(--accent-forest);
}

/* Expanded State Details */
.expanded-details {
    display: none;
    border-left: 1px solid var(--border-soft);
    padding-left: 2rem;
}

.work-card.expanded .expanded-details {
    display: block;
}

.detail-section {
    margin-bottom: 1.5rem;
}

.detail-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.detail-value {
    font-size: 0.95rem;
}

.alt-date-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    padding: 4px 0;
    border-bottom: 1px dashed var(--border-soft);
}
.alt-date-row:last-child { border-bottom: none; }

/* Responsive */
@media (max-width: 768px) {
    .site-header, main { padding: 1rem; }
    .hero-title { flex-direction: column; align-items: flex-start; gap: 0; }
    .title-en { font-size: 2rem; }
    .controls-bar { flex-direction: column; align-items: stretch; }
    
    .work-card.expanded {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .expanded-details {
        border-left: none;
        border-top: 1px solid var(--border-soft);
        padding-left: 0;
        padding-top: 1rem;
    }
}