/* ============================================
   حلب عبر العصور — Interactive Timeline
   Single stylesheet (Hostinger constraint)
   ============================================ */

/* --- Design Tokens --- */
:root {
    --parchment: #FAF3E6;
    --parchment-dark: #F0E6D0;
    --stone: #8B8177;
    --stone-light: #A89F96;
    --ink: #2C1810;
    --ink-light: #4A3728;
    --gold: #C4973B;
    --gold-light: #D4AD5C;
    --gold-dark: #A07D2E;

    --font-display: 'Amiri', serif;
    --font-body: 'Cairo', sans-serif;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    --max-width: 1200px;
    --timeline-width: 3px;
    --timeline-dot: 16px;
    --era-strip-height: 56px;
    --header-height: 64px;

    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-xslow: 800ms cubic-bezier(0.16, 1, 0.3, 1);

    --shadow-sm: 0 1px 3px rgba(44, 24, 16, 0.1);
    --shadow-md: 0 4px 12px rgba(44, 24, 16, 0.12);
    --shadow-lg: 0 8px 24px rgba(44, 24, 16, 0.16);
    --shadow-xl: 0 16px 48px rgba(44, 24, 16, 0.2);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + var(--era-strip-height) + 1rem);
}

body {
    font-family: var(--font-body);
    background: var(--parchment);
    color: var(--ink);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    /* Subtle parchment texture */
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(196, 151, 59, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(139, 129, 119, 0.04) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 80%, rgba(196, 151, 59, 0.03) 0%, transparent 50%);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold-dark); text-decoration: none; }
a:hover { color: var(--gold); }
ul, ol { list-style-position: inside; }

/* --- Skip Link --- */
.skip-link {
    position: absolute;
    top: -100%;
    inset-inline-start: 0;
    background: var(--ink);
    color: var(--parchment);
    padding: var(--space-sm) var(--space-md);
    z-index: 1000;
}
.skip-link:focus { top: 0; }

/* --- Site Header --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--ink);
    color: var(--parchment);
    height: var(--header-height);
    display: flex;
    align-items: center;
    border-bottom: 2px solid var(--gold);
    box-shadow: 0 4px 20px rgba(44, 24, 16, 0.3);
}

.header-inner {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-title {
    display: flex;
    flex-direction: column;
}

.title-main {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gold);
    line-height: 1.2;
}

.title-sub {
    font-family: var(--font-body);
    font-size: 0.75rem;
    color: var(--stone-light);
    font-weight: 400;
    line-height: 1.3;
}

.search-toggle {
    background: none;
    border: none;
    color: var(--parchment);
    cursor: pointer;
    padding: var(--space-sm);
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background var(--transition-fast);
}
.search-toggle:hover { background: rgba(250, 243, 230, 0.1); }

/* --- Era Strip --- */
.era-strip {
    position: sticky;
    top: var(--header-height);
    z-index: 90;
    background: var(--ink-light);
    border-bottom: 1px solid rgba(196, 151, 59, 0.3);
    height: var(--era-strip-height);
    overflow: hidden;
}

.era-strip-inner {
    display: flex;
    height: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.era-strip-inner::-webkit-scrollbar { display: none; }

.era-block {
    flex: 1 0 auto;
    min-width: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xs) var(--space-sm);
    text-decoration: none;
    color: var(--parchment);
    scroll-snap-align: start;
    position: relative;
    transition: background var(--transition-fast);
    border-inline-end: 1px solid rgba(250, 243, 230, 0.1);
    min-height: 48px;
}

.era-block::after {
    content: '';
    position: absolute;
    bottom: 0;
    inset-inline-start: 0;
    inset-inline-end: 0;
    height: 3px;
    background: var(--era-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.era-block:hover { background: rgba(250, 243, 230, 0.05); }
.era-block:hover::after { opacity: 0.5; }
.era-block.active { background: rgba(250, 243, 230, 0.1); }
.era-block.active::after { opacity: 1; }

.era-block-name {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    line-height: 1.3;
}

.era-block-dates {
    font-size: 0.6rem;
    opacity: 0.7;
    white-space: nowrap;
    line-height: 1.2;
}

/* --- Intro Section --- */
.intro-section {
    text-align: center;
    padding: var(--space-4xl) var(--space-lg);
    background: linear-gradient(180deg, var(--ink) 0%, #1a1008 40%, var(--ink-light) 100%);
    color: var(--parchment);
    position: relative;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Animated floating particles */
.intro-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(2px 2px at 15% 25%, rgba(196, 151, 59, 0.4), transparent),
        radial-gradient(2px 2px at 85% 15%, rgba(196, 151, 59, 0.3), transparent),
        radial-gradient(1.5px 1.5px at 45% 75%, rgba(196, 151, 59, 0.3), transparent),
        radial-gradient(2px 2px at 70% 60%, rgba(196, 151, 59, 0.2), transparent),
        radial-gradient(1px 1px at 30% 45%, rgba(250, 243, 230, 0.3), transparent),
        radial-gradient(1.5px 1.5px at 55% 20%, rgba(196, 151, 59, 0.25), transparent),
        radial-gradient(1px 1px at 90% 80%, rgba(250, 243, 230, 0.2), transparent),
        radial-gradient(2px 2px at 10% 70%, rgba(196, 151, 59, 0.15), transparent);
    animation: twinkle 8s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes twinkle {
    0% { opacity: 0.5; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

.intro-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    inset-inline-start: 0;
    inset-inline-end: 0;
    height: 120px;
    background: linear-gradient(180deg, transparent, var(--parchment));
    z-index: 2;
}

.intro-inner {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 3;
}

.intro-icon {
    margin-bottom: var(--space-xl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.intro-title {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--gold);
    margin-bottom: var(--space-md);
    line-height: 1.4;
    text-shadow: 0 2px 20px rgba(196, 151, 59, 0.3);
}

.intro-text {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--parchment-dark);
    margin-bottom: var(--space-2xl);
}

.intro-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gold);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--stone-light);
}

.intro-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0 var(--space-xl);
    border: 2px solid var(--gold);
    color: var(--gold);
    border-radius: 30px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-normal);
    min-height: 52px;
    line-height: 52px;
}

.intro-cta:hover {
    background: var(--gold);
    color: var(--ink);
    box-shadow: 0 0 30px rgba(196, 151, 59, 0.4);
}

/* Scroll hint arrow */
.intro-cta .arrow {
    display: inline-block;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(4px); }
}

/* --- Ornamental Divider --- */
.ornament-divider {
    text-align: center;
    padding: var(--space-lg) 0;
    position: relative;
}

.ornament-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    inset-inline-start: 10%;
    inset-inline-end: 10%;
    height: 1px;
    background: linear-gradient(
        to left,
        transparent,
        var(--gold) 30%,
        var(--gold) 70%,
        transparent
    );
    opacity: 0.3;
}

.ornament-divider svg {
    position: relative;
    z-index: 1;
    background: var(--parchment);
    padding: 0 var(--space-md);
}

/* --- Era Sections --- */
.era-section {
    position: relative;
    padding-bottom: 0;
}

/* Era Hero */
.era-hero {
    background: var(--era-bg, var(--ink));
    padding: 0;
    position: relative;
    overflow: hidden;
    min-height: 420px;
    display: flex;
    align-items: flex-end;
}

/* Hero background image */
.era-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.35;
    transition: opacity 1s ease;
}

.era-section:hover .era-hero-bg {
    opacity: 0.45;
}

/* Gradient overlays on hero */
.era-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(0,0,0,0.1) 0%, var(--era-bg, var(--ink)) 90%),
        radial-gradient(circle at 20% 50%, rgba(196, 151, 59, 0.1) 0%, transparent 50%);
    z-index: 1;
    pointer-events: none;
}

.era-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    inset-inline-start: 0;
    inset-inline-end: 0;
    height: 80px;
    background: linear-gradient(180deg, transparent, var(--parchment));
    z-index: 3;
}

.era-hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 2;
    color: var(--parchment);
    padding: var(--space-4xl) var(--space-lg) var(--space-3xl);
    width: 100%;
}

.era-dates {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--era-secondary, var(--gold-light));
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.02em;
    display: inline-block;
    background: rgba(0, 0, 0, 0.3);
    padding: var(--space-xs) var(--space-md);
    border-radius: 20px;
    backdrop-filter: blur(4px);
}

.era-title {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--parchment);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.era-subtitle {
    font-size: 1.1rem;
    color: var(--era-secondary, var(--gold-light));
    margin-bottom: var(--space-lg);
    font-weight: 600;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}

.era-summary {
    font-size: 1rem;
    line-height: 2;
    max-width: 750px;
    color: rgba(250, 243, 230, 0.9);
    margin-bottom: var(--space-lg);
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

/* Sub-periods */
.sub-periods {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.sub-period {
    display: inline-block;
    background: rgba(250, 243, 230, 0.12);
    border: 1px solid rgba(250, 243, 230, 0.2);
    padding: var(--space-xs) var(--space-md);
    border-radius: 20px;
    font-size: 0.8rem;
    color: rgba(250, 243, 230, 0.85);
    backdrop-filter: blur(4px);
    transition: background var(--transition-fast);
}

.sub-period:hover {
    background: rgba(250, 243, 230, 0.2);
}

.sub-period small { opacity: 0.7; }

/* --- Era Icon SVG --- */
.era-hero-icon {
    position: absolute;
    inset-inline-end: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    opacity: 0.08;
    pointer-events: none;
}

.era-hero-icon svg {
    width: 250px;
    height: 250px;
}

/* --- Timeline --- */
.era-timeline {
    position: relative;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

/* FIXED: Use left:50% with margin for RTL-safe centering */
.timeline-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: calc(var(--timeline-width) / -2);
    width: var(--timeline-width);
    background: linear-gradient(
        180deg,
        transparent,
        var(--era-primary, var(--gold)) 5%,
        var(--era-primary, var(--gold)) 95%,
        transparent
    );
    opacity: 0.3;
}

/* Timeline Items */
.timeline-item {
    position: relative;
    display: flex;
    margin-bottom: var(--space-2xl);
    align-items: flex-start;
}

.timeline-item--start {
    justify-content: flex-start;
    padding-inline-end: calc(50% + 2rem);
}

.timeline-item--end {
    justify-content: flex-end;
    padding-inline-start: calc(50% + 2rem);
}

/* FIXED: Timeline dot uses left:50% with margin for RTL-safe centering */
.timeline-dot {
    position: absolute;
    left: 50%;
    margin-left: calc(var(--timeline-dot) / -2);
    top: 1.5rem;
    width: var(--timeline-dot);
    height: var(--timeline-dot);
    background: var(--era-primary, var(--gold));
    border: 3px solid var(--parchment);
    border-radius: 50%;
    z-index: 2;
    box-shadow: var(--shadow-sm);
    transition: filter var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    filter: drop-shadow(0 0 6px var(--era-primary, var(--gold)));
}

.timeline-dot--ruler {
    background: var(--gold);
    width: 20px;
    height: 20px;
    margin-left: -10px;
    border-width: 3px;
}

/* Timeline Cards */
.timeline-card {
    background: white;
    border-radius: 12px;
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: box-shadow var(--transition-normal), filter var(--transition-normal);
    width: 100%;
    border-top: 3px solid var(--era-primary, var(--gold));
    position: relative;
    overflow: hidden;
}

.timeline-card::before {
    content: '';
    position: absolute;
    top: 0;
    inset-inline-start: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 70%, rgba(196, 151, 59, 0.04) 100%);
    pointer-events: none;
}

.timeline-card:hover,
.timeline-card:focus-visible {
    box-shadow: var(--shadow-lg);
    filter: drop-shadow(0 0 12px rgba(196, 151, 59, 0.12));
}

.timeline-card:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}

.timeline-card--ruler {
    border-top-color: var(--gold);
    background: linear-gradient(135deg, white 0%, #FFF9EE 100%);
}

/* Card reveal animations — staggered from sides */
.timeline-item {
    opacity: 0;
    transition: opacity var(--transition-xslow), transform var(--transition-xslow);
}

.timeline-item--start {
    transform: translateX(40px);
}

.timeline-item--end {
    transform: translateX(-40px);
}

html[dir="rtl"] .timeline-item--start {
    transform: translateX(-40px);
}

html[dir="rtl"] .timeline-item--end {
    transform: translateX(40px);
}

.timeline-item.revealed {
    opacity: 1;
    transform: translateX(0) !important;
}

.card-year {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--era-primary, var(--gold-dark));
    margin-bottom: var(--space-xs);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.card-excerpt {
    font-size: 0.9rem;
    color: var(--ink-light);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-subtitle {
    font-size: 0.85rem;
    color: var(--stone);
    margin-bottom: var(--space-sm);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.card-tag {
    display: inline-block;
    background: var(--parchment);
    border: 1px solid var(--parchment-dark);
    padding: 2px var(--space-sm);
    border-radius: 12px;
    font-size: 0.7rem;
    color: var(--stone);
    transition: background var(--transition-fast);
}

.card-tag:hover {
    background: var(--parchment-dark);
}

.card-significance {
    position: absolute;
    top: var(--space-md);
    inset-inline-end: var(--space-md);
    font-size: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.card-significance--major { background: var(--gold); box-shadow: 0 0 6px rgba(196, 151, 59, 0.4); }
.card-significance--notable { background: var(--stone-light); }
.card-significance--minor { background: var(--parchment-dark); }

/* Read more hint */
.card-more {
    display: inline-block;
    margin-top: var(--space-sm);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--era-primary, var(--gold-dark));
    opacity: 0;
    transform: translateY(4px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.timeline-card:hover .card-more {
    opacity: 1;
    transform: translateY(0);
}

/* Ruler achievements */
.ruler-achievements {
    margin-top: var(--space-sm);
    padding: 0;
    list-style: none;
}

.ruler-achievements li {
    font-size: 0.85rem;
    color: var(--ink-light);
    line-height: 1.7;
    padding-inline-start: var(--space-md);
    position: relative;
}

.ruler-achievements li::before {
    content: '◆';
    position: absolute;
    inset-inline-start: 0;
    color: var(--gold);
    font-size: 0.5rem;
    top: 0.5em;
}

/* --- Landmarks --- */
.era-landmarks {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

.landmarks-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--ink);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.landmarks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.landmark-card {
    background: white;
    border-radius: 12px;
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
    border-inline-start: 4px solid var(--era-primary, var(--gold));
}

.landmark-card:hover,
.landmark-card:focus-visible {
    box-shadow: var(--shadow-md);
}
.landmark-card:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}

.landmark-name {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--ink);
    margin-bottom: var(--space-sm);
}

.landmark-desc {
    font-size: 0.85rem;
    color: var(--ink-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.landmark-status {
    display: inline-block;
    font-size: 0.75rem;
    background: var(--parchment);
    border: 1px solid var(--parchment-dark);
    padding: 2px var(--space-sm);
    border-radius: 12px;
    color: var(--stone);
}

/* --- Search Overlay --- */
.search-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(44, 24, 16, 0.97);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
    backdrop-filter: blur(8px);
}

.search-overlay.open { opacity: 1; pointer-events: auto; }

.search-overlay-inner {
    width: 100%;
    max-width: 600px;
    padding: 0 var(--space-lg);
}

.search-header {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
    margin-bottom: var(--space-xl);
}

.search-input {
    flex: 1;
    background: rgba(250, 243, 230, 0.1);
    border: 2px solid var(--gold);
    border-radius: 12px;
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--parchment);
    outline: none;
    min-height: 48px;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}
.search-input::placeholder { color: var(--stone-light); }
.search-input:focus { border-color: var(--gold-light); background: rgba(250, 243, 230, 0.15); }

.search-close {
    background: none;
    border: none;
    color: var(--parchment);
    cursor: pointer;
    padding: var(--space-sm);
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background var(--transition-fast);
}
.search-close:hover { background: rgba(250, 243, 230, 0.1); }

.search-results {
    max-height: 60vh;
    overflow-y: auto;
}

.search-result-group { margin-bottom: var(--space-xl); }

.search-result-group-title {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid rgba(196, 151, 59, 0.3);
}

.search-result-item {
    padding: var(--space-md);
    border-radius: 8px;
    cursor: pointer;
    transition: background var(--transition-fast);
    color: var(--parchment);
}
.search-result-item:hover { background: rgba(250, 243, 230, 0.08); }

.search-result-title {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.search-result-meta {
    font-size: 0.8rem;
    color: var(--stone-light);
}

.search-no-results {
    text-align: center;
    color: var(--stone-light);
    padding: var(--space-2xl);
    font-size: 1rem;
}

/* --- Detail Panel --- */
/* FIXED: Use physical properties for predictable slide behavior */
.detail-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 520px;
    height: 100vh;
    height: 100dvh;
    z-index: 150;
    background: white;
    box-shadow: var(--shadow-xl);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

html[dir="rtl"] .detail-panel {
    left: auto;
    right: 0;
    transform: translateX(100%);
}

.detail-panel.open {
    transform: translateX(0);
}

.detail-panel-inner {
    padding: var(--space-2xl) var(--space-lg);
    padding-top: var(--space-xl);
}

.detail-close {
    position: sticky;
    top: var(--space-md);
    float: left;
    background: var(--parchment);
    border: none;
    cursor: pointer;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    z-index: 10;
    transition: background var(--transition-fast);
    color: var(--ink);
    margin-bottom: var(--space-md);
}

html[dir="rtl"] .detail-close {
    float: right;
}

.detail-close:hover { background: var(--parchment-dark); }

.detail-content { clear: both; }

.detail-content .detail-year {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gold-dark);
    margin-bottom: var(--space-sm);
}

.detail-content .detail-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.detail-content .detail-meta {
    font-size: 0.85rem;
    color: var(--stone);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--parchment-dark);
}

.detail-content .detail-body {
    font-size: 1rem;
    line-height: 2;
    color: var(--ink-light);
    margin-bottom: var(--space-lg);
}

.detail-content .detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.detail-content .detail-tag {
    display: inline-block;
    background: var(--parchment);
    border: 1px solid var(--parchment-dark);
    padding: var(--space-xs) var(--space-md);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--stone);
}

.detail-content .detail-achievements {
    list-style: none;
    padding: 0;
}

.detail-content .detail-achievements li {
    padding: var(--space-sm) 0;
    padding-inline-start: var(--space-lg);
    position: relative;
    font-size: 0.95rem;
    line-height: 1.8;
    border-bottom: 1px solid var(--parchment);
}

.detail-content .detail-achievements li::before {
    content: '◆';
    position: absolute;
    inset-inline-start: 0;
    color: var(--gold);
    font-size: 0.6rem;
    top: 0.85em;
}

.detail-content .detail-section-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

/* Detail Backdrop */
.detail-backdrop {
    position: fixed;
    inset: 0;
    z-index: 140;
    background: rgba(44, 24, 16, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
    backdrop-filter: blur(2px);
}
.detail-backdrop.open { opacity: 1; pointer-events: auto; }

/* --- Footer --- */
.site-footer {
    background: var(--ink);
    color: var(--stone-light);
    padding: var(--space-3xl) var(--space-lg);
    text-align: center;
    border-top: 2px solid var(--gold);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: -40px;
    inset-inline-start: 0;
    inset-inline-end: 0;
    height: 40px;
    background: linear-gradient(180deg, transparent, var(--ink));
    pointer-events: none;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-text {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--gold);
    margin-bottom: var(--space-sm);
}

.footer-note {
    font-size: 0.8rem;
    color: var(--stone);
    line-height: 1.6;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    :root {
        --header-height: 56px;
        --era-strip-height: 48px;
    }

    .title-main { font-size: 1.15rem; }
    .title-sub { font-size: 0.65rem; }
    .era-block { min-width: 90px; }
    .era-block-name { font-size: 0.65rem; }
    .era-block-dates { font-size: 0.55rem; }
    .intro-title { font-size: 1.8rem; }
    .intro-section { min-height: 70vh; padding: var(--space-2xl) var(--space-md); }
    .intro-stats { gap: var(--space-md); }
    .stat-number { font-size: 1.8rem; }
    .era-title { font-size: 1.8rem; }
    .era-hero { min-height: 350px; }
    .era-hero-icon { display: none; }

    /* FIXED: Single column timeline on mobile — physical left for centering */
    .timeline-line {
        left: 1rem;
        margin-left: calc(var(--timeline-width) / -2);
    }

    html[dir="rtl"] .timeline-line {
        left: auto;
        right: 1rem;
        margin-left: 0;
        margin-right: calc(var(--timeline-width) / -2);
    }

    .timeline-dot {
        left: 1rem;
        margin-left: calc(var(--timeline-dot) / -2);
    }

    html[dir="rtl"] .timeline-dot {
        left: auto;
        right: 1rem;
        margin-left: 0;
        margin-right: calc(var(--timeline-dot) / -2);
    }

    html[dir="rtl"] .timeline-dot--ruler {
        margin-right: -10px;
    }

    .timeline-item--start,
    .timeline-item--end {
        padding-inline-start: 2.5rem;
        padding-inline-end: 0;
        justify-content: flex-start;
    }

    /* Override slide direction on mobile - all slide from same side */
    .timeline-item--start,
    .timeline-item--end {
        transform: translateY(30px);
    }

    html[dir="rtl"] .timeline-item--start,
    html[dir="rtl"] .timeline-item--end {
        transform: translateY(30px);
    }

    .era-timeline { padding: var(--space-lg) var(--space-md); }
    .card-title { font-size: 1.1rem; }
    .detail-panel { max-width: 100%; }
    .landmarks-grid { grid-template-columns: 1fr; }
    .search-overlay { padding-top: 8vh; }
}

@media (max-width: 480px) {
    .intro-section { padding: var(--space-2xl) var(--space-md); }
    .intro-stats { flex-direction: row; flex-wrap: wrap; justify-content: center; }
    .stat { min-width: 80px; }
    .sub-periods { flex-direction: column; }
    .era-block { min-width: 80px; padding: var(--space-xs) var(--space-sm); }
    .era-hero { min-height: 300px; }
}

@media (min-width: 1200px) {
    .era-timeline { padding: var(--space-3xl) var(--space-lg); }
    .timeline-card { max-width: 450px; }
    .era-hero-icon svg { width: 300px; height: 300px; }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
    .timeline-item { opacity: 1; transform: none !important; transition: none; }
    .detail-panel, .search-overlay, .detail-backdrop { transition: none; }
    .era-hero-bg { transition: none; }
}

/* --- Print --- */
@media print {
    .site-header, .era-strip, .search-overlay, .detail-panel,
    .detail-backdrop, .search-toggle, .intro-cta, .era-hero-icon { display: none; }
    .timeline-item { opacity: 1; transform: none !important; }
    .card-excerpt { -webkit-line-clamp: unset; overflow: visible; }
    .era-hero { background: white !important; color: black !important; min-height: auto; }
    .era-hero-content, .era-title, .era-summary { color: black !important; text-shadow: none !important; }
    .era-hero-bg { display: none; }
}