/* ============================================
   ROBOT FOUNDATION MODELS - STYLES
   Aesthetic: Minimal / Clean / Grid Layout
   ============================================ */

/* --- FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS VARIABLES --- */
:root {
    /* Minimal palette */
    --black: #111111;
    --white: #FAFAFA;
    --gray-50: #F7F7F7;
    --gray-100: #EEEEEE;
    --gray-200: #E0E0E0;
    --gray-300: #CCCCCC;
    --gray-400: #999999;
    --gray-500: #777777;
    --gray-600: #666666;
    --gray-700: #444444;
    --gray-800: #333333;

    /* Single accent */
    --accent: #0066FF;
    --accent-muted: rgba(0, 102, 255, 0.1);

    /* For errors only */
    --red: #E53935;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
}

/* --- RESET & BASE --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--white);
    color: var(--black);
    min-height: 100vh;
}

/* --- LAYOUT CONTAINER --- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-xl);
}

/* --- HEADER --- */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
}

.logo h1 {
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--black);
}

.logo h1 span {
    color: var(--gray-400);
    font-weight: 400;
}

/* Stats bar */
.stats-bar {
    display: flex;
    gap: var(--space-xl);
    align-items: baseline;
}

.stat {
    text-align: right;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1;
    color: var(--black);
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    margin-top: var(--space-xs);
}

/* --- FILTERS --- */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: flex-end;
    padding: var(--space-md) 0;
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--gray-100);
    justify-content: space-between;
}

.filters-left {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: flex-end;
}

.filters-right {
    display: flex;
    gap: var(--space-md);
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.filter-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
}

.filter-select {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.5em 2em 0.5em 0.75em;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    background: var(--white);
    color: var(--gray-800);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5em center;
    min-width: 160px;
}

.filter-select:hover {
    border-color: var(--gray-400);
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent);
}

.filter-reset {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.5em 1em;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    background: var(--white);
    color: var(--gray-600);
    cursor: pointer;
    transition: all 0.15s ease;
    align-self: flex-end;
}

.filter-reset:hover {
    border-color: var(--gray-400);
    color: var(--gray-800);
}

.filter-input {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.5em 2em 0.5em 0.75em;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    background: var(--white);
    color: var(--gray-800);
    min-width: 200px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6em center;
}

.filter-input:hover {
    border-color: var(--gray-400);
}

.filter-input:focus {
    outline: none;
    border-color: var(--accent);
}

.filter-input::placeholder {
    color: var(--gray-400);
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-xl);
    color: var(--gray-400);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* --- CARDS GRID --- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
    padding-bottom: var(--space-xl);
}

/* --- GRID CARD --- */
.grid-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: var(--space-lg);
    cursor: pointer;
    transition: all 0.2s ease;
}

.grid-card:hover {
    border-color: var(--gray-400);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.grid-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-xs);
}

.grid-card-title {
    flex: 1;
    min-width: 0;
}

.grid-card-name {
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--black);
    margin-bottom: var(--space-xs);
}

.grid-card-org {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-600);
}

.grid-card-badges {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.grid-card-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 0.3em 0.6em;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-radius: 4px;
    white-space: nowrap;
}

.grid-card-badge-os {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 600;
    padding: 0.3em 0.5em;
    border-radius: 4px;
    white-space: nowrap;
}

.grid-card-badge-os.opensource-yes {
    background: #E8F5E9;
    color: #2E7D32;
}

.grid-card-badge-os.opensource-partial {
    background: #FFF8E1;
    color: #F57F17;
}

.grid-card-badge-os.opensource-no {
    background: #FFEBEE;
    color: #C62828;
}

.grid-card-date {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-400);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--gray-100);
}

.grid-card-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.grid-card-spec {
    padding: var(--space-sm) 0;
}

.spec-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    margin-bottom: 2px;
}

.spec-value {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--black);
}

/* --- MODAL --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--white);
    border-radius: 16px;
    width: 100%;
    max-width: 720px;
    max-height: 90vh;
    overflow: hidden;
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 36px;
    height: 36px;
    border: none;
    background: var(--gray-100);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--black);
}

.modal-content {
    padding: var(--space-xl);
    max-height: calc(90vh - 32px);
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    padding-right: var(--space-xl);
}

.modal-title {
    flex: 1;
}

.modal-name {
    font-family: var(--font-body);
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--black);
    margin-bottom: var(--space-xs);
}

.modal-org {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--gray-600);
}

.modal-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    padding: 0.4em 0.8em;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-radius: 4px;
    white-space: nowrap;
}

.modal-date {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--gray-400);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--gray-100);
}

.modal-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.modal-spec {
    padding: var(--space-sm) 0;
}

.modal-section {
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--gray-50);
    border-radius: 8px;
}

.modal-section-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    margin-bottom: var(--space-sm);
}

.modal-section p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--gray-800);
}

.modal-badges {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* --- DATA PROFILE SECTION --- */
.data-profile {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.data-profile-top {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.data-profile-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.data-profile-header {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    margin-bottom: var(--space-xs);
}

/* Scale Section */
.data-scale-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.data-scale-item {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gray-800);
}

.data-scale-value {
    font-weight: 600;
    color: var(--black);
}

.data-scale-label {
    color: var(--gray-500);
}

/* Access Pill */
.data-access-pill {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 0.3em 0.6em;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    cursor: default;
}

.data-access-pill.access-open {
    background: #E8F5E9;
    color: #2E7D32;
}

.data-access-pill.access-partial {
    background: #FFF8E1;
    color: #F57F17;
}

.data-access-pill.access-closed {
    background: #FFEBEE;
    color: #C62828;
}

.data-access-pill[title] {
    cursor: help;
    border-bottom: 1px dashed currentColor;
}

/* Collection */
.data-collection-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-600);
    line-height: 1.4;
}

/* Dataset Tags */
.data-datasets {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--gray-100);
}

.dataset-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: var(--space-xs);
}

.dataset-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    padding: 4px 10px;
    background: #EEF2FF;
    color: #4F46E5;
    border-radius: 4px;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .data-profile-top {
        grid-template-columns: 1fr;
    }
}

/* --- PERFORMANCE SECTION --- */

.perf-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.perf-headline {
    font-size: 0.95rem;
    font-weight: 600;
    color: #166534;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 6px;
    padding: 10px 14px;
    display: inline-block;
}

.perf-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.perf-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.perf-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.perf-item {
    font-size: 0.8rem;
    line-height: 1.4;
}

.perf-item-name {
    color: var(--gray-500);
}

.perf-item-score {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--gray-800);
}

.perf-comparison {
    font-size: 0.8rem;
    color: var(--gray-700);
    line-height: 1.4;
    padding-left: 14px;
    position: relative;
}

.perf-arrow {
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: 600;
}

.perf-more {
    font-size: 0.75rem;
    color: var(--gray-400);
    margin-top: 4px;
}

.perf-source {
    font-size: 0.75rem;
    color: var(--gray-400);
    font-style: italic;
    padding-top: var(--space-sm);
    border-top: 1px dashed var(--gray-200);
}

@media (max-width: 768px) {
    .perf-columns {
        grid-template-columns: 1fr;
    }
}

.model-link {
    color: var(--accent);
    text-decoration: none;
    cursor: pointer;
    border-bottom: 1px dashed var(--accent);
    transition: all 0.15s ease;
}

.model-link:hover {
    border-bottom-style: solid;
}

.modal-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.modal-links-top {
    margin-bottom: var(--space-md);
}

.modal-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-decoration: none;
    padding: 0.5em 1em;
    background: var(--accent-muted);
    border-radius: 6px;
    transition: all 0.15s ease;
}

.modal-link:hover {
    background: var(--accent);
    color: var(--white);
}

/* --- LOADING & ERROR STATES --- */
.loading,
.error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--space-md);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-400);
}

.error {
    display: none;
    background: rgba(229, 57, 53, 0.05);
    border: 1px solid var(--red);
    border-radius: 8px;
    padding: var(--space-xl);
}

.error-title {
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--red);
    margin-bottom: var(--space-sm);
}

.error-message {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gray-600);
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .container {
        padding: var(--space-md);
    }

    .timeline-container {
        margin-bottom: var(--space-lg);
    }

    .timeline-label {
        font-size: 0.5rem;
        max-width: 60px;
    }

    .header {
        flex-direction: column;
        gap: var(--space-md);
        align-items: flex-start;
    }

    .stats-bar {
        width: 100%;
        justify-content: flex-start;
        gap: var(--space-lg);
    }

    .stat {
        text-align: left;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .modal {
        max-height: 100vh;
        border-radius: 0;
    }

    .modal-content {
        padding: var(--space-lg);
    }

    .modal-name {
        font-size: 1.5rem;
    }

    .modal-specs {
        grid-template-columns: 1fr;
    }
}

/* --- ARCHITECTURE EVOLUTION --- */
.arch-evolution {
    margin-bottom: var(--space-sm);
    padding: var(--space-md) 0;
}

/* Expand bar at bottom - attached to cards */
.arch-expand-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: 8px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--gray-400);
    background: var(--gray-50);
    border: none;
    border-top: 1px solid var(--gray-200);
    cursor: pointer;
    transition: all 0.15s ease;
}

.arch-expand-bar:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.arch-expand-bar-icon {
    font-size: 0.55rem;
    transition: transform 0.2s ease;
}

.arch-expand-bar[aria-expanded="true"] .arch-expand-bar-icon {
    transform: rotate(180deg);
}

/* Details section - appears below the bar */
.arch-details-section {
    display: none;
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.arch-evolution.expanded .arch-details-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}

.arch-details-panel {
    padding: var(--space-md);
    border-right: 1px solid var(--gray-200);
}

.arch-details-panel:last-child {
    border-right: none;
}

.arch-cards-wrapper {
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    overflow: hidden;
    background: var(--white);
}

.arch-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}

.arch-card {
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    position: relative;
}

.arch-card:last-child {
    border-right: none;
}

/* Color accents */
.arch-card[data-color="purple"] { border-top: 3px solid #8b5cf6; }
.arch-card[data-color="gray"] { border-top: 3px solid #6b7280; }
.arch-card[data-color="green"] { border-top: 3px solid #22c55e; }
.arch-card[data-color="orange"] { border-top: 3px solid #f97316; }
.arch-card[data-color="blue"] { border-top: 3px solid #3b82f6; }

.arch-card-header {
    margin-bottom: var(--space-sm);
    text-align: center;
}

.arch-card-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.arch-card[data-color="purple"] .arch-card-label { color: #8b5cf6; }
.arch-card[data-color="gray"] .arch-card-label { color: #6b7280; }
.arch-card[data-color="green"] .arch-card-label { color: #22c55e; }
.arch-card[data-color="orange"] .arch-card-label { color: #f97316; }
.arch-card[data-color="blue"] .arch-card-label { color: #3b82f6; }

/* Schematic - Vertical Flow */
.arch-schematic {
    padding: var(--space-sm) 0;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.arch-flow-vertical {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    width: 100%;
}

.arch-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.arch-arrow-down {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-400);
    line-height: 1;
}

.arch-box {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 6px 10px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    white-space: nowrap;
    color: var(--gray-700);
    text-align: center;
}

.arch-box.arch-large {
    padding: 8px 12px;
    font-weight: 500;
}

.arch-box.arch-input {
    background: #f8fafc;
    border-color: var(--gray-300);
    color: var(--gray-600);
}

.arch-box.arch-core {
    background: var(--gray-800);
    color: var(--white);
    border-color: var(--gray-800);
    font-weight: 600;
}

.arch-box.arch-pretrained {
    background: var(--white);
    border: 2px dashed var(--gray-500);
    font-weight: 600;
    color: var(--gray-800);
}

.arch-box.arch-secondary {
    background: var(--gray-50);
    border-color: var(--gray-300);
    color: var(--gray-700);
}

.arch-box.arch-intermediate {
    background: #FFF8E1;
    border: 1px dashed #FFB300;
    color: #F57F17;
    font-style: italic;
}

.arch-box.arch-actions {
    background: #E8F5E9;
    border-color: #81C784;
    color: #2E7D32;
    font-weight: 600;
}

.arch-box.arch-dashed {
    background: var(--white);
    border: 1px dashed var(--gray-400);
    color: var(--gray-500);
}

.arch-box-note {
    font-family: var(--font-mono);
    font-size: 0.5rem;
    color: var(--gray-400);
    font-style: italic;
}

.arch-box-subtitle {
    font-family: var(--font-mono);
    font-size: 0.5rem;
    color: var(--gray-400);
    text-align: center;
    margin-top: -2px;
    margin-bottom: 2px;
    font-style: italic;
}

.arch-box-subtitle.arch-warning {
    color: #f97316;
}

/* Details inside cards - hidden, moved to details section */
.arch-card .arch-details {
    display: none;
}

.arch-detail-item {
    margin-bottom: var(--space-sm);
}

.arch-detail-item:last-child {
    margin-bottom: 0;
}

.arch-detail-label {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--gray-400);
    display: block;
    margin-bottom: 2px;
}

.arch-detail-item p {
    font-size: 0.7rem;
    line-height: 1.5;
    color: var(--gray-700);
    margin: 0;
}

/* Narrative style for arch details */
.arch-narrative {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.arch-narrative-header {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    font-style: italic;
    color: var(--gray-800);
    line-height: 1.3;
    margin: 0 0 var(--space-xs) 0;
}

.arch-narrative p {
    font-size: 0.75rem;
    line-height: 1.6;
    color: var(--gray-700);
    margin: 0;
}

.arch-narrative p strong {
    color: var(--gray-800);
    font-weight: 600;
}

.arch-narrative-footer {
    font-style: italic;
    color: var(--gray-500) !important;
    margin-top: var(--space-xs) !important;
    padding-top: var(--space-sm);
    border-top: 1px dashed var(--gray-200);
}

/* Mobile responsive */
@media (max-width: 1200px) {
    .arch-box {
        font-size: 0.6rem;
        padding: 5px 8px;
    }

    .arch-card-label {
        font-size: 0.65rem;
    }
}

@media (max-width: 900px) {
    .arch-cards,
    .arch-evolution.expanded .arch-details-section {
        grid-template-columns: 1fr;
    }

    .arch-card {
        border-right: none;
        border-bottom: 1px solid var(--gray-200);
    }

    .arch-card:last-child {
        border-bottom: none;
    }

    .arch-details-panel {
        border-right: none;
        border-bottom: 1px solid var(--gray-200);
    }

    .arch-details-panel:last-child {
        border-bottom: none;
    }
}

/* --- HORIZONTAL TIMELINE --- */
.timeline-container {
    margin-bottom: var(--space-lg);
    padding: var(--space-sm) 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.timeline-container::-webkit-scrollbar {
    height: 6px;
}

.timeline-container::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 3px;
}

.timeline-container::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

.timeline-container::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}


.timeline-scroll {
    width: 100%;
}

.timeline-track {
    position: relative;
    width: 100%;
    min-width: 900px;
    min-height: 250px;
}

.timeline-segment {
    position: absolute;
    bottom: 40px;
    height: 3px;
    border-radius: 2px;
}

.timeline-year {
    position: absolute;
    bottom: 15px;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--gray-400);
}

.timeline-dot {
    position: absolute;
    bottom: 36px;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    transform: translateX(-50%);
    transition: all 0.15s ease;
    cursor: pointer;
    z-index: 2;
    opacity: 0;
}

.timeline-dot:hover,
.timeline-dot.active {
    opacity: 1;
    transform: translateX(-50%) scale(1.5);
}

.timeline-label {
    position: absolute;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--gray-600);
    white-space: nowrap;
    transition: all 0.15s ease;
    cursor: pointer;
}

.timeline-label:hover,
.timeline-label.active {
    color: var(--accent);
}

.timeline-date-popup {
    position: absolute;
    bottom: 48px;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--white);
    background: var(--accent);
    padding: 2px 6px;
    border-radius: 3px;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.15s ease;
    pointer-events: none;
    z-index: 10;
}

.timeline-dot:hover + .timeline-date-popup,
.timeline-dot.active + .timeline-date-popup {
    opacity: 1;
}

.timeline-era-label {
    position: absolute;
    bottom: 48px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0.8;
}

/* --- CARD EXPAND INDICATOR --- */
.grid-card-expand {
    position: absolute;
    bottom: var(--space-md);
    right: var(--space-md);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: all 0.2s ease;
}

.grid-card-expand svg {
    width: 16px;
    height: 16px;
}

.grid-card:hover .grid-card-expand {
    color: var(--accent);
    transform: scale(1.1);
}

.grid-card {
    position: relative;
}

/* --- FOOTER --- */
.site-footer {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    margin-top: var(--space-xl);
    border-top: 1px solid var(--gray-100);
}

.site-footer p {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-400);
}

.site-footer a {
    color: var(--gray-600);
    text-decoration: none;
    transition: color 0.15s ease;
}

.site-footer a:hover {
    color: var(--accent);
}

/* --- GLOSSARY TOOLTIPS --- */
.glossary-term {
    border-bottom: 1px dotted var(--gray-400);
    cursor: help;
    transition: all 0.15s ease;
}

.glossary-term:hover {
    border-bottom-color: var(--accent);
    color: var(--accent);
}

.glossary-tooltip {
    position: absolute;
    z-index: 2000;
    max-width: 300px;
    padding: 12px 14px;
    background: var(--gray-800);
    color: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    font-size: 0.8rem;
    line-height: 1.5;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s ease, visibility 0.15s ease;
    pointer-events: none;
}

.glossary-tooltip.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.glossary-tooltip-term {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--white);
    margin-bottom: 6px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--gray-600);
}

.glossary-tooltip-def {
    color: var(--gray-200);
}

/* Tooltip arrow - optional */
.glossary-tooltip::before {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid var(--gray-800);
}

/* --- UTILITY CLASSES --- */
.hidden { display: none !important; }
.visible { display: block !important; }