/* ==========================================================================
   ICE Training Deficiencies Timeline
   Professional, minimal design with smooth mobile-first interactions
   ========================================================================== */

:root {
    /* Colors */
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: #e5e5e5;
    --color-border-light: #f0f0f0;

    /* Category colors */
    --color-watchdog: #1e40af;
    --color-court: #7c2d12;
    --color-investigation: #4338ca;
    --color-incident: #991b1b;
    --color-policy: #166534;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Source Serif 4', Georgia, serif;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Layout */
    --max-width: 900px;
    --timeline-line-width: 2px;
    --timeline-dot-size: 12px;
}

/* ==========================================================================
   Dark Mode
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #111111;
        --color-surface: #1c1c1c;
        --color-text: #e5e5e5;
        --color-text-secondary: #a3a3a3;
        --color-text-muted: #5a5a5a;
        --color-border: #2e2e2e;
        --color-border-light: #232323;
        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    }
}

[data-theme="dark"] {
    --color-bg: #111111;
    --color-surface: #1c1c1c;
    --color-text: #e5e5e5;
    --color-text-secondary: #a3a3a3;
    --color-text-muted: #5a5a5a;
    --color-border: #2e2e2e;
    --color-border-light: #232323;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: #e5e5e5;
    --color-border-light: #f0f0f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
    background: linear-gradient(180deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #ffffff;
    padding: var(--space-3xl) var(--space-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.site-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: var(--max-width);
    margin: 0 auto;
}

.site-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

.site-subtitle {
    font-size: clamp(0.9rem, 2.5vw, 1.1rem);
    color: rgba(255, 255, 255, 0.7);
    font-weight: 400;
}

/* ==========================================================================
   Theme Toggle
   ========================================================================== */

.theme-toggle {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.85);
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
    z-index: 2;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    color: #ffffff;
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* In light mode show moon (to switch to dark), in dark mode show sun (to switch to light) */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
    .theme-toggle .icon-sun { display: block; }
    .theme-toggle .icon-moon { display: none; }
}
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ==========================================================================
   Navigation & Filters
   ========================================================================== */

.timeline-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: var(--space-md);
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    pointer-events: none;
}

#search-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    padding-left: calc(var(--space-md) + 26px);
    padding-right: calc(var(--space-md) + 30px);
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#search-input:focus {
    outline: none;
    border-color: var(--color-text);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

#search-input::placeholder {
    color: var(--color-text-muted);
}

.clear-search {
    position: absolute;
    right: var(--space-sm);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    border-radius: 4px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.clear-search.visible {
    opacity: 1;
    visibility: visible;
}

.clear-search:hover {
    background: var(--color-border-light);
    color: var(--color-text);
}

.clear-search svg {
    width: 16px;
    height: 16px;
}

.filter-container {
    display: flex;
    gap: var(--space-sm);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: var(--space-xs);
    margin: 0 calc(var(--space-lg) * -1);
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
}

.filter-container::-webkit-scrollbar {
    display: none;
}

.filter-btn {
    flex-shrink: 0;
    padding: var(--space-xs) var(--space-md);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--color-text-secondary);
}

.filter-btn.active {
    color: #ffffff;
    background: var(--color-text);
    border-color: var(--color-text);
}

.filter-btn[data-filter="watchdog"].active {
    background: var(--color-watchdog);
    border-color: var(--color-watchdog);
}

.filter-btn[data-filter="court"].active {
    background: var(--color-court);
    border-color: var(--color-court);
}

.filter-btn[data-filter="investigation"].active {
    background: var(--color-investigation);
    border-color: var(--color-investigation);
}

.filter-btn[data-filter="incident"].active {
    background: var(--color-incident);
    border-color: var(--color-incident);
}

.filter-btn[data-filter="policy"].active {
    background: var(--color-policy);
    border-color: var(--color-policy);
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.timeline-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    position: relative;
}

.timeline-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-border-light);
    z-index: 1000;
}

.progress-bar {
    height: 100%;
    background: var(--color-text);
    width: 0%;
    transition: width 100ms linear;
}

/* ==========================================================================
   Executive Summary
   ========================================================================== */

.executive-summary {
    background: var(--color-surface);
    border-radius: 12px;
    padding: var(--space-xl);
    margin-bottom: var(--space-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
}

.executive-summary h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

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

@media (min-width: 640px) {
    .summary-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat {
    text-align: center;
    padding: var(--space-md);
    background: var(--color-bg);
    border-radius: 8px;
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
    line-height: 1.4;
}

.summary-text {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* ==========================================================================
   Timeline
   ========================================================================== */

.timeline {
    position: relative;
    padding-left: calc(var(--timeline-dot-size) / 2 + var(--space-lg));
}

.timeline::before {
    content: '';
    position: absolute;
    left: calc(var(--timeline-dot-size) / 2 - var(--timeline-line-width) / 2);
    top: 0;
    bottom: 0;
    width: var(--timeline-line-width);
    background: var(--color-border);
}

.timeline-year {
    position: relative;
    margin-bottom: var(--space-lg);
}

.year-marker {
    position: absolute;
    left: calc((var(--timeline-dot-size) / 2 + var(--space-lg)) * -1 - var(--space-md));
    transform: translateX(-100%);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: var(--color-bg);
    padding: var(--space-xs) 0;
}

.timeline-event {
    position: relative;
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.timeline-event.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-event.filtered-out {
    display: none;
}

.timeline-event::before {
    content: '';
    position: absolute;
    left: calc((var(--timeline-dot-size) / 2 + var(--space-lg)) * -1);
    top: var(--space-lg);
    width: var(--timeline-dot-size);
    height: var(--timeline-dot-size);
    background: var(--color-surface);
    border: var(--timeline-line-width) solid var(--color-border);
    border-radius: 50%;
    transition: all var(--transition-fast);
    z-index: 1;
}

.timeline-event[data-category="watchdog"]::before {
    border-color: var(--color-watchdog);
}

.timeline-event[data-category="court"]::before {
    border-color: var(--color-court);
}

.timeline-event[data-category="investigation"]::before {
    border-color: var(--color-investigation);
}

.timeline-event[data-category="incident"]::before {
    border-color: var(--color-incident);
}

.timeline-event[data-category="policy"]::before {
    border-color: var(--color-policy);
}

.event-card {
    background: var(--color-surface);
    border-radius: 12px;
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    cursor: pointer;
    transition: all var(--transition-base);
}

.event-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.event-card:active {
    transform: translateY(0);
}

.event-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.event-date {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.event-category {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--color-bg);
}

.event-category[data-category="watchdog"] {
    color: var(--color-watchdog);
    background: rgba(30, 64, 175, 0.1);
}

.event-category[data-category="court"] {
    color: var(--color-court);
    background: rgba(124, 45, 18, 0.1);
}

.event-category[data-category="investigation"] {
    color: var(--color-investigation);
    background: rgba(67, 56, 202, 0.1);
}

.event-category[data-category="incident"] {
    color: var(--color-incident);
    background: rgba(153, 27, 27, 0.1);
}

.event-category[data-category="policy"] {
    color: var(--color-policy);
    background: rgba(22, 101, 52, 0.1);
}

.event-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.event-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.event-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
}

.event-source {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.event-expand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.event-expand svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.event-card:hover .event-expand svg {
    transform: translateX(4px);
}

/* ==========================================================================
   Media Placeholder
   ========================================================================== */

.media-placeholder {
    background: var(--color-bg);
    border-radius: 8px;
    aspect-ratio: 16/9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    border: 1px dashed var(--color-border);
}

.media-placeholder svg {
    width: 32px;
    height: 32px;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.media-placeholder span {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Actual Media Elements
   ========================================================================== */

.media-figure {
    margin: 0 0 var(--space-md) 0;
}

.media-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

.media-caption {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    font-style: italic;
    text-align: center;
}

.media-video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    margin-bottom: var(--space-sm);
    border-radius: 8px;
    overflow: hidden;
    background: var(--color-bg);
}

.media-video-wrapper iframe,
.media-video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.media-audio-wrapper {
    margin-bottom: var(--space-md);
}

.media-audio-wrapper audio {
    width: 100%;
    border-radius: 8px;
}

.media-embed-wrapper {
    margin-bottom: var(--space-md);
    border-radius: 8px;
    overflow: hidden;
}

/* ==========================================================================
   Modal
   ========================================================================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.modal {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 90vh;
    background: var(--color-surface);
    border-radius: 16px 16px 0 0;
    z-index: 1001;
    transform: translateY(100%);
    transition: transform var(--transition-slow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

@media (min-width: 768px) {
    .modal {
        top: 50%;
        left: 50%;
        bottom: auto;
        right: auto;
        transform: translate(-50%, -50%) scale(0.95);
        max-width: 700px;
        width: calc(100% - var(--space-xl) * 2);
        max-height: 85vh;
        border-radius: 16px;
        opacity: 0;
    }

    .modal-overlay.active .modal {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-content {
    padding: var(--space-xl);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.modal-header {
    margin-bottom: var(--space-lg);
    padding-right: var(--space-xl);
}

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

.modal-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

.modal-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 4px 10px;
    border-radius: 4px;
}

.modal-body {
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.modal-body p {
    margin-bottom: var(--space-md);
}

.modal-body p:last-child {
    margin-bottom: 0;
}

.modal-body strong {
    color: var(--color-text);
    font-weight: 600;
}

.modal-body blockquote {
    margin: var(--space-lg) 0;
    padding: var(--space-md) var(--space-lg);
    border-left: 3px solid var(--color-border);
    background: var(--color-bg);
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

.modal-body ul {
    margin: var(--space-md) 0;
    padding-left: var(--space-lg);
}

.modal-body li {
    margin-bottom: var(--space-sm);
}

.modal-media {
    margin: var(--space-lg) 0;
}

.modal-media img,
.modal-media video,
.modal-media iframe {
    border: 1px solid var(--color-border-light);
}

.modal-source {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border-light);
}

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

.modal-source-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    color: var(--color-text);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border-radius: 6px;
    transition: background-color var(--transition-fast);
    word-break: break-all;
}

.modal-source-link:hover {
    background: var(--color-border-light);
}

.modal-source-link svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
}

.modal-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--color-border-light);
    background: var(--color-surface);
    flex-shrink: 0;
}

.modal-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

.modal-nav-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.modal-nav-btn:hover:not(:disabled) {
    background: var(--color-border-light);
    color: var(--color-text);
}

.modal-nav-btn:disabled {
    opacity: 0.3;
    cursor: default;
}

.modal-nav-counter {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
    flex: 1;
    text-align: center;
}

/* ==========================================================================
   Sources Section
   ========================================================================== */

.sources-section {
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-border);
}

.sources-section h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.sources-grid {
    display: grid;
    gap: var(--space-md);
}

@media (min-width: 640px) {
    .sources-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.source-card {
    padding: var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.source-card:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.source-type {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.source-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.source-link {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.source-link svg {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-2xl);
}

.site-footer p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.site-footer .disclaimer {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Scroll to Top
   ========================================================================== */

.scroll-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 44px;
    height: 44px;
    background: var(--color-text);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 50;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    transform: translateY(-2px);
}

.scroll-top:active {
    transform: translateY(0);
}

.scroll-top svg {
    width: 24px;
    height: 24px;
}

/* ==========================================================================
   No Results
   ========================================================================== */

.no-results {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
    color: var(--color-text-muted);
}

.no-results svg {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.no-results p {
    font-size: 1rem;
}

/* ==========================================================================
   Highlight for search
   ========================================================================== */

mark {
    background: rgba(255, 220, 0, 0.4);
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

@media (prefers-color-scheme: dark) {
    mark { background: rgba(255, 220, 0, 0.2); }

    /* --color-text is light in dark mode, so elements using it as a background need inverting */
    .filter-btn.active {
        background: #ffffff;
        border-color: #ffffff;
        color: #111111;
    }
    .scroll-top {
        background: #ffffff;
        color: #111111;
    }
    .progress-bar {
        background: #ffffff;
    }
}
[data-theme="dark"] mark { background: rgba(255, 220, 0, 0.2); }
[data-theme="dark"] .filter-btn.active {
    background: #ffffff;
    border-color: #ffffff;
    color: #111111;
}
[data-theme="dark"] .scroll-top {
    background: #ffffff;
    color: #111111;
}
[data-theme="dark"] .progress-bar {
    background: #ffffff;
}
[data-theme="light"] mark { background: rgba(255, 220, 0, 0.4); }

/* ==========================================================================
   Warning/Incident Highlight
   ========================================================================== */

.warning-highlight {
    background: linear-gradient(to bottom, rgba(220, 38, 38, 0.12) 0%, rgba(220, 38, 38, 0.06) 100%);
    border-left: 3px solid #dc2626;
    padding: 0.5rem 0.75rem;
    margin: 0.5rem 0;
    display: block;
    border-radius: 0 4px 4px 0;
}

.modal-body blockquote.warning-highlight {
    border-left: 3px solid #dc2626;
    background: linear-gradient(to bottom, rgba(220, 38, 38, 0.12) 0%, rgba(220, 38, 38, 0.06) 100%);
}

.modal-body ul.warning-highlight {
    padding-left: var(--space-xl);
    list-style-position: inside;
}

.modal-body ul.warning-highlight li {
    list-style-position: outside;
    margin-left: 1rem;
}

/* ==========================================================================
   Responsive adjustments
   ========================================================================== */

@media (min-width: 768px) {
    .timeline {
        padding-left: calc(80px + var(--space-xl));
    }

    .timeline::before {
        left: 80px;
    }

    .timeline-event::before {
        left: calc(-1 * var(--space-xl) - var(--timeline-dot-size) / 2);
    }

    .year-marker {
        left: 0;
        transform: none;
        width: 60px;
        text-align: right;
    }
}

/* ==========================================================================
   Print styles
   ========================================================================== */

@media print {
    .timeline-nav,
    .scroll-top,
    .modal-overlay,
    .timeline-progress {
        display: none !important;
    }

    .timeline-event {
        opacity: 1 !important;
        transform: none !important;
    }

    .event-card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }
}