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

:root {
    --bg: #f5f0e8;
    --bg-light: #fdfcf8;
    --sidebar-bg: rgba(253, 252, 248, 0.95);
    --text: #2c2416;
    --text-secondary: #8b7d6b;
    --text-muted: #b5a997;
    --border: #e0d6c8;
    --border-light: #ece5d8;
    --accent: #c5a55a;
    --active-bg: #2c2416;
    --active-text: #fdfcf8;
    --panel-bg: rgba(253, 252, 248, 0.97);
    --shadow: rgba(44, 36, 22, 0.12);
    --font-cn: 'Noto Serif SC', 'Songti SC', serif;
    --font-ja: 'Noto Serif JP', 'Hiragino Mincho ProN', serif;
    --font-en: 'Playfair Display', Georgia, serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Antiquity palette */
    --bronze: #8b6914;
    --bronze-light: #c5a55a;
    --bronze-dark: #5a4210;
    --brass: #b08d3e;
    --gold: #d4a843;
    --gold-glow: #e8c35a;
    --amber: #f0d080;
    --patina-dark: #1a1610;
    --patina-warm: #2a2118;
    --patina-mid: #3d3020;
    --patina-border: #5a4a30;
    --parchment: #f5edd8;
    --ctrl-bg: #1e1a12;
    --ctrl-surface: #2a2218;
    --ctrl-highlight: rgba(197, 165, 90, 0.12);
}

html, body {
    width: 100%; height: 100%;
    overflow: hidden;
    background: var(--bg);
    font-family: var(--font-body);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}

html[lang="ja"] #main-title,
html[lang="ja"] .cta-label,
html[lang="ja"] #loading-inner h2 {
    font-family: var(--font-ja);
}

#app {
    width: 100%; height: 100%;
    position: relative;
    overflow: hidden;
}

/* === TITLE BAR === */
#title-bar {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 100;
    pointer-events: none;
}

#main-title {
    font-family: var(--font-cn);
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 2px;
    text-shadow: 0 1px 3px rgba(245, 240, 232, 0.8);
}

#stats-line {
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
}

#current-country-name {
    font-family: var(--font-en);
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin-top: 4px;
    min-height: 28px;
}

/* === SIDEBAR === */
#sidebar {
    position: fixed;
    top: 0; left: 0;
    width: 190px;
    height: 100vh;
    background: var(--sidebar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-light);
    z-index: 200;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    overflow: hidden;
}

#sidebar.collapsed {
    transform: translateX(-190px);
}

/* Sidebar expand button -- antique brass style */
#sidebar-expand {
    position: fixed;
    top: 12px; left: 12px;
    z-index: 201;
    background: var(--patina-warm);
    border: 1px solid var(--patina-border);
    border-radius: 4px;
    padding: 8px 14px;
    font-size: 13px;
    color: var(--bronze-light);
    cursor: pointer;
    box-shadow:
        0 2px 12px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(197, 165, 90, 0.15),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-en);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}
#sidebar-expand:hover {
    background: var(--patina-mid);
    color: var(--amber);
    box-shadow:
        0 2px 16px rgba(0, 0, 0, 0.35),
        0 0 8px rgba(197, 165, 90, 0.15),
        inset 0 1px 0 rgba(197, 165, 90, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
}

/* Menu icon -- CSS-only hamburger with brass look */
.menu-icon {
    display: inline-block;
    width: 14px;
    height: 10px;
    position: relative;
    border-top: 2px solid var(--bronze-light);
    border-bottom: 2px solid var(--bronze-light);
}
.menu-icon::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--bronze-light);
}

#sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 14px 8px;
    border-bottom: 1px solid var(--border-light);
}

#sidebar-title {
    font-family: var(--font-en);
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
}

/* Sidebar collapse -- ornate minus button */
#sidebar-collapse {
    background: var(--patina-warm);
    border: 1px solid var(--patina-border);
    border-radius: 3px;
    font-size: 15px;
    font-weight: 700;
    color: var(--bronze-light);
    cursor: pointer;
    line-height: 1;
    padding: 3px 8px;
    transition: all 0.25s ease;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.3);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.12),
        inset 0 -1px 0 rgba(0, 0, 0, 0.15),
        0 1px 3px rgba(0, 0, 0, 0.2);
}
#sidebar-collapse:hover {
    background: var(--patina-mid);
    color: var(--amber);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.15),
        0 0 6px rgba(197, 165, 90, 0.2);
}

/* Language switcher in sidebar header */
#lang-switcher {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px 0;
}

.lang-icon {
    color: var(--text-secondary);
    flex-shrink: 0;
    pointer-events: none;
}

#lang-select {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 22px 4px 8px;
    font-size: 12px;
    font-family: var(--font-body);
    color: var(--text);
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s ease;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 5 5-5' fill='none' stroke='%238b7d6b' stroke-width='1.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 5px center;
}

#lang-select:hover {
    border-color: var(--accent);
}

#lang-select:focus {
    border-color: var(--accent);
}

#search-box {
    padding: 8px 12px;
    position: relative;
}

/* Search icon -- CSS-only magnifying glass */
.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    opacity: 0.55;
}
.search-icon::before {
    content: '';
    display: block;
    width: 9px;
    height: 9px;
    border: 1.5px solid var(--text-secondary);
    border-radius: 50%;
}
.search-icon::after {
    content: '';
    display: block;
    width: 5px;
    height: 1.5px;
    background: var(--text-secondary);
    transform: rotate(45deg);
    transform-origin: left center;
    position: absolute;
    bottom: 0;
    right: 0;
}

#country-search {
    width: 100%;
    padding: 6px 8px 6px 28px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-light);
    font-size: 12px;
    color: var(--text);
    outline: none;
    font-family: var(--font-body);
    transition: border-color 0.2s ease;
}

#country-search:focus {
    border-color: var(--accent);
}

/* Country List */
#country-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

#country-list::-webkit-scrollbar {
    width: 4px;
}
#country-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.country-item {
    display: flex;
    align-items: baseline;
    padding: 6px 14px;
    cursor: pointer;
    transition: background 0.2s ease;
    font-size: 12px;
    gap: 4px;
}

.country-item:hover {
    background: rgba(197, 165, 90, 0.08);
}

.country-item .c-name {
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
}

.country-item .c-name-cn {
    color: var(--text-secondary);
    font-family: var(--font-cn);
    font-size: 11px;
    white-space: nowrap;
}

.country-item .c-dash {
    color: var(--text-muted);
    margin: 0 2px;
    flex-shrink: 0;
}

.country-item .c-count {
    color: var(--text-secondary);
    margin-left: auto;
    font-variant-numeric: tabular-nums;
    flex-shrink: 0;
}

/* Country Detail */
#country-detail {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

#country-detail::-webkit-scrollbar {
    width: 4px;
}
#country-detail::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

/* Country back button -- antique brass button */
#country-back {
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 700;
    color: var(--bronze-light);
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    border-bottom: none;
    margin-bottom: 0;
    background: var(--patina-warm);
    position: sticky;
    top: 0;
    z-index: 2;
    letter-spacing: 0.3px;
    font-family: var(--font-en);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    box-shadow:
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(197, 165, 90, 0.1),
        0 2px 6px rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--patina-border);
}
#country-back:hover {
    background: var(--patina-mid);
    color: var(--amber);
    box-shadow:
        inset 0 -1px 0 rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(197, 165, 90, 0.15),
        0 0 8px rgba(197, 165, 90, 0.15);
}

#detail-country-name {
    padding: 2px 14px 8px;
    font-family: var(--font-en);
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
}

#detail-stats {
    display: flex;
    gap: 16px;
    padding: 0 14px 10px;
}

.stat-box {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.stat-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#detail-thumbnails {
    padding: 0 0 8px;
}

/* Timeline styles */
.timeline-era {
    display: flex;
    align-items: center;
    gap: 0;
    padding: 10px 10px 3px 8px;
    position: sticky;
    top: 40px;
    z-index: 1;
    background: linear-gradient(180deg, var(--sidebar-bg) 60%, transparent);
}

.timeline-era::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    box-shadow: 0 0 0 2px rgba(197, 165, 90, 0.2);
}

.timeline-era-label {
    font-family: var(--font-cn);
    font-size: 11px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.5px;
    white-space: nowrap;
    margin-left: 6px;
}

.timeline-era-count {
    font-size: 10px;
    color: var(--text-muted);
    margin-left: auto;
    font-style: italic;
}

.timeline-era::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border), transparent);
    margin-left: 6px;
}

.timeline-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    padding: 3px 6px 6px 18px;
    border-left: 2px solid var(--border);
    margin-left: 11px;
    background: linear-gradient(90deg, rgba(197, 165, 90, 0.03), transparent 30%);
}

.timeline-grid .thumb-item {
    border-radius: 1px;
    box-shadow: 0 1px 3px rgba(44, 36, 22, 0.1);
}

.thumb-item {
    aspect-ratio: 1;
    border-radius: 2px;
    cursor: pointer;
    overflow: hidden;
    position: relative;
    background: var(--border-light);
}

.thumb-item canvas,
.thumb-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.thumb-item:hover {
    opacity: 0.85;
    outline: 2px solid var(--accent);
}

/* === GLOBE === */
#globe-container {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1;
}

#globe-container canvas {
    display: block;
}

/* === CONTROLS -- Bronze Museum Instrument Panel === */
#controls {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(
        180deg,
        #2e2518 0%,
        #221c12 40%,
        #1a150e 100%
    );
    padding: 6px 16px;
    border-radius: 6px;
    border: 1px solid var(--patina-border);
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.4),
        0 1px 0 rgba(197, 165, 90, 0.08) inset,
        0 -1px 0 rgba(0, 0, 0, 0.3) inset,
        0 0 0 0.5px rgba(90, 74, 48, 0.5);
    pointer-events: all;
}

.ctrl-group {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* Control buttons -- embossed bronze style */
.ctrl-btn {
    background: transparent;
    border: 1px solid rgba(90, 74, 48, 0.4);
    padding: 4px 10px;
    border-radius: 3px;
    font-size: 11px;
    color: var(--bronze-light);
    cursor: pointer;
    transition: all 0.25s ease;
    font-family: var(--font-en);
    white-space: nowrap;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.08),
        inset 0 -1px 0 rgba(0, 0, 0, 0.15);
}

.ctrl-btn:hover {
    background: rgba(197, 165, 90, 0.12);
    color: var(--amber);
    border-color: rgba(197, 165, 90, 0.3);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.12),
        inset 0 -1px 0 rgba(0, 0, 0, 0.15),
        0 0 8px rgba(197, 165, 90, 0.1);
}

.ctrl-btn.active {
    background: linear-gradient(
        180deg,
        var(--gold) 0%,
        var(--brass) 100%
    );
    color: var(--patina-dark);
    border-color: var(--gold);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
    box-shadow:
        0 0 10px rgba(197, 165, 90, 0.35),
        0 0 3px rgba(212, 168, 67, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.1);
    font-weight: 700;
}

/* Size dots -- bronze rivets */
.size-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, var(--amber), var(--bronze-dark));
    box-shadow:
        inset 0 -1px 1px rgba(0, 0, 0, 0.3),
        0 1px 2px rgba(0, 0, 0, 0.3);
    border: 0.5px solid rgba(197, 165, 90, 0.3);
}
.size-dot.large {
    width: 9px; height: 9px;
}

/* Size slider -- brass track and thumb */
#size-slider {
    width: 54px;
    height: 3px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(90deg, var(--patina-border), var(--bronze-dark));
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    border: 0.5px solid rgba(90, 74, 48, 0.4);
}

#size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: radial-gradient(circle at 40% 35%, var(--amber), var(--brass) 60%, var(--bronze-dark));
    cursor: pointer;
    box-shadow:
        0 1px 4px rgba(0, 0, 0, 0.4),
        inset 0 1px 1px rgba(255, 255, 255, 0.15);
    border: 1px solid var(--bronze-dark);
    transition: box-shadow 0.2s ease;
}
#size-slider::-webkit-slider-thumb:hover {
    box-shadow:
        0 0 8px rgba(197, 165, 90, 0.4),
        0 1px 4px rgba(0, 0, 0, 0.4),
        inset 0 1px 1px rgba(255, 255, 255, 0.15);
}

/* Firefox slider thumb */
#size-slider::-moz-range-thumb {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: radial-gradient(circle at 40% 35%, var(--amber), var(--brass) 60%, var(--bronze-dark));
    cursor: pointer;
    box-shadow:
        0 1px 4px rgba(0, 0, 0, 0.4),
        inset 0 1px 1px rgba(255, 255, 255, 0.15);
    border: 1px solid var(--bronze-dark);
}

#size-value {
    font-size: 10px;
    color: var(--bronze-light);
    min-width: 18px;
    text-align: center;
    font-variant-numeric: tabular-nums;
    opacity: 0.7;
}

/* Control separator -- brass rivet line */
.ctrl-separator {
    width: 1px;
    height: 18px;
    background: linear-gradient(
        180deg,
        transparent,
        var(--patina-border) 20%,
        var(--bronze-light) 50%,
        var(--patina-border) 80%,
        transparent
    );
    margin: 0 4px;
    opacity: 0.5;
}

/* === DETAIL PANEL === */
#detail-panel {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 150;
    background: var(--panel-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    box-shadow: 0 4px 24px var(--shadow);
    display: flex;
    max-width: 520px;
    width: 90vw;
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

#detail-panel.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

#panel-image-wrap {
    width: 140px;
    min-height: 140px;
    flex-shrink: 0;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#panel-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#panel-info {
    padding: 14px 16px;
    flex: 1;
    min-width: 0;
}

#panel-title {
    font-family: var(--font-cn);
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    line-height: 1.3;
}

#panel-meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

#panel-description {
    font-size: 12px;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

#panel-link {
    font-size: 11px;
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}
#panel-link:hover { color: var(--text); }

/* Panel close -- ornate close button */
#panel-close {
    position: absolute;
    top: 6px; right: 8px;
    background: var(--patina-warm);
    border: 1px solid var(--patina-border);
    border-radius: 3px;
    font-size: 14px;
    font-weight: 700;
    color: var(--bronze-light);
    cursor: pointer;
    line-height: 1;
    padding: 3px 6px;
    transition: all 0.25s ease;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.3);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.1),
        0 1px 3px rgba(0, 0, 0, 0.15);
}
#panel-close:hover {
    color: var(--amber);
    background: var(--patina-mid);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.15),
        0 0 6px rgba(197, 165, 90, 0.2);
}

/* === TOOLTIP === */
#tooltip {
    position: fixed;
    z-index: 300;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px 10px;
    pointer-events: none;
    box-shadow: 0 2px 8px var(--shadow);
    display: flex;
    gap: 6px;
    align-items: baseline;
    transition: opacity 0.12s ease;
}

#tooltip-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    max-width: 260px;
    overflow: hidden;
    text-overflow: ellipsis;
}

#tooltip-date {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* === LOADING -- Bronze/Gold Dramatic === */
#loading {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(
        160deg,
        #1a150e 0%,
        #2a2118 40%,
        #1e1a12 100%
    );
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease;
}

#loading.fade-out {
    opacity: 0;
    pointer-events: none;
}

#loading-inner {
    text-align: center;
}

#loading-inner h2 {
    font-family: var(--font-cn);
    font-size: 36px;
    font-weight: 700;
    color: var(--parchment);
    letter-spacing: 6px;
    margin-bottom: 16px;
    text-shadow:
        0 0 20px rgba(197, 165, 90, 0.3),
        0 2px 4px rgba(0, 0, 0, 0.5);
}

#loading-inner p {
    font-size: 14px;
    color: var(--bronze-light);
    margin-bottom: 20px;
    font-family: var(--font-en);
    letter-spacing: 2px;
    text-transform: uppercase;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

#loading-bar {
    width: 240px;
    height: 4px;
    background: var(--patina-border);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
    box-shadow:
        inset 0 1px 2px rgba(0, 0, 0, 0.4),
        0 1px 0 rgba(197, 165, 90, 0.05);
    border: 0.5px solid rgba(90, 74, 48, 0.3);
}

#loading-progress {
    width: 0%;
    height: 100%;
    background: linear-gradient(
        90deg,
        var(--bronze-dark),
        var(--brass) 30%,
        var(--gold) 50%,
        var(--amber) 70%,
        var(--gold) 85%,
        var(--brass)
    );
    border-radius: 2px;
    transition: width 0.3s ease;
    box-shadow: 0 0 8px rgba(197, 165, 90, 0.4);
}

/* === SLIDESHOW === */
#slideshow {
    position: fixed;
    right: 40px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 120;
    width: 320px;
    pointer-events: all;
}

#slide-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4;
    border-radius: 4px;
    overflow: hidden;
    background: #1a1610;
    box-shadow:
        0 8px 40px rgba(44, 36, 22, 0.35),
        0 0 0 1px rgba(197, 165, 90, 0.15),
        inset 0 0 60px rgba(0, 0, 0, 0.3);
}

#slide-img, #slide-img-next {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #1a1610;
    transition: opacity 1.2s ease;
}

#slide-img-next {
    opacity: 0;
}

#slide-info {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0 2px;
}

#slide-name {
    font-family: var(--font-cn);
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    text-shadow: 0 1px 4px rgba(245, 240, 232, 0.6);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#slide-date {
    font-family: var(--font-cn);
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

#slide-material {
    font-size: 11px;
    color: var(--text-muted);
    font-style: italic;
}

#slide-progress {
    margin-top: 8px;
    width: 100%;
    height: 2px;
    background: var(--border);
    border-radius: 1px;
    overflow: hidden;
    position: relative;
}

#slide-progress::after {
    content: '';
    position: absolute;
    left: 0; top: 0;
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--brass), var(--gold), var(--amber));
    border-radius: 1px;
    animation: slide-timer 4s linear infinite;
}

@keyframes slide-timer {
    from { width: 0%; }
    to { width: 100%; }
}

#slide-counter {
    margin-top: 4px;
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 1px;
    font-variant-numeric: tabular-nums;
}

/* Slideshow prev/next -- brass arrow buttons */
#slide-prev, #slide-next {
    position: absolute;
    top: 50%;
    transform: translateY(-100%);
    background: linear-gradient(
        180deg,
        rgba(42, 33, 24, 0.7) 0%,
        rgba(26, 21, 14, 0.85) 100%
    );
    border: 1px solid rgba(197, 165, 90, 0.25);
    color: var(--bronze-light);
    font-size: 28px;
    line-height: 1;
    padding: 8px 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.1),
        0 2px 6px rgba(0, 0, 0, 0.3);
}

#slide-prev:hover, #slide-next:hover {
    background: linear-gradient(
        180deg,
        rgba(60, 48, 30, 0.85) 0%,
        rgba(30, 24, 16, 0.95) 100%
    );
    color: var(--amber);
    border-color: rgba(197, 165, 90, 0.4);
    box-shadow:
        inset 0 1px 0 rgba(197, 165, 90, 0.15),
        0 0 10px rgba(197, 165, 90, 0.15),
        0 2px 6px rgba(0, 0, 0, 0.3);
}

#slide-prev { left: 0; border-radius: 0 4px 4px 0; border-left: none; }
#slide-next { right: 0; border-radius: 4px 0 0 4px; border-right: none; }

/* === MAP GALLERY (reserved) === */
#map-gallery { display: none; }

/* === COLLECT COUNTER === */
#collect-counter {
    position: fixed;
    z-index: 300;
    pointer-events: none;
    text-align: center;
    transform: translate(-50%, -100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: rgba(26, 21, 14, 0.75);
    padding: 8px 20px 10px;
    border-radius: 8px;
    border: 1px solid rgba(197, 165, 90, 0.3);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

#counter-text {
    font-family: var(--font-en);
    font-size: 28px;
    font-weight: 700;
    color: var(--amber);
    text-shadow:
        0 0 12px rgba(240, 208, 128, 0.5),
        0 1px 2px rgba(0, 0, 0, 0.6);
    font-variant-numeric: tabular-nums;
    letter-spacing: 2px;
}

#counter-message {
    font-family: var(--font-cn);
    font-size: 14px;
    color: var(--parchment);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.8s ease;
    letter-spacing: 1px;
}

#counter-message.visible {
    opacity: 1;
}

/* === CENTER CTA === */
#center-cta {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 110;
    pointer-events: all;
    animation: cta-fade-in 0.8s ease 0.5s both;
}

@keyframes cta-fade-in {
    from { opacity: 0; transform: translate(-50%, -40%); }
    to   { opacity: 1; transform: translate(-50%, -50%); }
}

#btn-go-home-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 20px 40px;
    border: 1px solid rgba(197, 165, 90, 0.4);
    border-radius: 12px;
    background: linear-gradient(
        160deg,
        rgba(42, 33, 24, 0.85) 0%,
        rgba(26, 21, 14, 0.92) 100%
    );
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    cursor: pointer;
    transition: all 0.35s ease;
    box-shadow:
        0 8px 40px rgba(0, 0, 0, 0.5),
        0 0 20px rgba(197, 165, 90, 0.1),
        inset 0 1px 0 rgba(197, 165, 90, 0.15),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
}

#btn-go-home-cta:hover {
    border-color: rgba(197, 165, 90, 0.6);
    transform: scale(1.05);
    box-shadow:
        0 12px 48px rgba(0, 0, 0, 0.6),
        0 0 30px rgba(197, 165, 90, 0.2),
        inset 0 1px 0 rgba(197, 165, 90, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
}

#btn-go-home-cta:active {
    transform: scale(0.98);
}

.cta-info {
    font-family: var(--font-cn);
    font-size: 14px;
    color: var(--bronze-light);
    letter-spacing: 1px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

.cta-divider {
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--patina-border), transparent);
    margin: 4px 0;
}

.cta-icon {
    font-size: 36px;
    color: var(--gold);
    text-shadow: 0 0 16px rgba(212, 168, 67, 0.5);
    line-height: 1;
}

.cta-label {
    font-family: var(--font-cn);
    font-size: 22px;
    font-weight: 700;
    color: var(--parchment);
    letter-spacing: 4px;
    text-shadow:
        0 0 12px rgba(197, 165, 90, 0.3),
        0 1px 2px rgba(0, 0, 0, 0.5);
}

.cta-sub {
    font-family: var(--font-en);
    font-size: 13px;
    color: var(--bronze-light);
    letter-spacing: 3px;
    text-transform: uppercase;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

/* === UTILITY === */
.hidden { display: none !important; }

/* === RESPONSIVE === */

/* --- Tablet (≤768px) --- */
@media (max-width: 768px) {
    #sidebar { width: 160px; }
    .country-item { padding: 5px 10px; font-size: 11px; }
    #main-title { font-size: 18px; }
    #controls { padding: 4px 10px; gap: 4px; }
    .ctrl-btn { padding: 3px 7px; font-size: 10px; }
    #size-slider { width: 40px; }
    #detail-panel { max-width: 360px; }

    /* Slideshow: bottom center overlay */
    #slideshow {
        right: auto;
        left: 50%;
        top: auto;
        bottom: 70px;
        transform: translateX(-50%);
        width: 280px;
    }

    /* CTA: smaller */
    #btn-go-home-cta { padding: 16px 32px; }
    .cta-label { font-size: 18px; letter-spacing: 3px; }
    .cta-icon { font-size: 28px; }
    .cta-sub { font-size: 11px; }
}

/* --- Phone (≤480px) --- */
@media (max-width: 480px) {
    /* Title bar */
    #main-title { font-size: 16px; letter-spacing: 1px; }
    #stats-line { font-size: 11px; }
    #current-country-name { font-size: 16px; min-height: 20px; }

    /* Sidebar: full overlay drawer */
    #sidebar {
        width: 260px;
        z-index: 300;
    }
    #sidebar.collapsed { transform: translateX(-260px); }

    /* Controls bar: wrap to 2 rows */
    #controls {
        flex-wrap: wrap;
        max-width: 340px;
        justify-content: center;
        padding: 6px 10px;
        gap: 4px;
        bottom: 8px;
    }
    .ctrl-btn { padding: 4px 8px; font-size: 10px; }
    .ctrl-separator { display: none; }
    #size-slider { width: 40px; }

    /* Slideshow: horizontal strip at bottom */
    #slideshow {
        right: 0;
        left: 0;
        top: auto;
        bottom: 60px;
        transform: none;
        width: 100%;
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 6px 10px;
        background: rgba(253, 252, 248, 0.95);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border-top: 1px solid var(--border-light);
        z-index: 120;
    }
    #slide-frame {
        width: 52px;
        min-width: 52px;
        aspect-ratio: 1;
        border-radius: 4px;
        flex-shrink: 0;
    }
    #slide-info {
        flex: 1;
        min-width: 0;
        margin-top: 0;
        gap: 1px;
    }
    #slide-name { font-size: 13px; }
    #slide-date { font-size: 10px; }
    #slide-material { font-size: 10px; }
    #slide-progress { display: none; }
    #slide-counter { display: none; }
    #slide-prev, #slide-next {
        position: static;
        transform: none;
        font-size: 18px;
        padding: 4px 6px;
        flex-shrink: 0;
        border-radius: 3px;
        border: 1px solid rgba(197, 165, 90, 0.25);
    }

    /* Detail panel: full-width vertical stack */
    #detail-panel {
        max-width: none;
        width: 94vw;
        bottom: 120px;
        flex-direction: column;
        border-radius: 10px;
    }
    #panel-image-wrap {
        width: 100%;
        min-height: 120px;
        max-height: 180px;
    }
    #panel-info { padding: 10px 12px; }
    #panel-title { font-size: 14px; }

    /* CTA: compact */
    #btn-go-home-cta { padding: 12px 24px; border-radius: 10px; }
    .cta-label { font-size: 16px; letter-spacing: 2px; }
    .cta-icon { font-size: 24px; }
    .cta-info { font-size: 12px; }
    .cta-sub { font-size: 10px; letter-spacing: 2px; }

    /* Loading */
    #loading-inner h2 { font-size: 24px; letter-spacing: 3px; }
    #loading-inner p { font-size: 12px; }
    #loading-bar { width: 200px; }

    /* Tooltip: useless without hover */
    #tooltip { display: none !important; }

    /* Counter: smaller */
    #collect-counter { padding: 6px 14px 8px; }
    #counter-text { font-size: 22px; }
    #counter-message { font-size: 12px; }
}