/* ===================================
   PhotoSpot PKU — Design System
   Map-dominant layout with floating panels
   =================================== */

/* ── CSS Variables ── */
:root {
    --color-bg: #0a0f16;
    --color-panel: rgba(10, 15, 22, 0.85);
    --color-panel-solid: #0d1420;
    --color-card: rgba(255, 255, 255, 0.06);
    --color-card-hover: rgba(255, 255, 255, 0.10);
    --color-text: #f0f4f8;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #475569;
    --color-accent: #38bdf8;
    --color-accent-glow: rgba(56, 189, 248, 0.3);
    --color-spot: #e8a73c;
    --color-spot-glow: rgba(232, 167, 60, 0.3);
    --color-key: #f59e0b;
    --color-border: rgba(255, 255, 255, 0.08);

    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Inter', 'SF Mono', 'Monaco', monospace;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-pill: 100px;
    --panel-width: 360px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

    --z-map: 0;
    --z-panel: 10;
    --z-badge: 20;
    --z-switcher: 20;
    --z-back: 20;
    --z-lightbox: 2000;
    --z-loading: 3000;
}

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

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

#map { position: absolute; inset: 0; z-index: var(--z-map); }
.mapboxgl-ctrl-logo, .mapboxgl-ctrl-attrib { display: none !important; }

/* ══════════════════════════════════
   BRAND BADGE (top-left) — hidden at Level 1 (panel has its own header)
   ══════════════════════════════════ */

#brand-badge {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: var(--z-badge);
    background: var(--color-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    display: none;
    align-items: center;
    gap: 10px;
    transition: opacity var(--transition-fast);
}

.brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

@supports not (backdrop-filter: blur(1px)) {
    #brand-badge { background: var(--color-panel-solid); }
}

#brand-badge.visible { display: flex; }

.brand-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    gap: 6px;
}

.brand-subtitle {
    font-size: 10px;
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* ══════════════════════════════════
   BACK BUTTON
   ══════════════════════════════════ */

#back-btn {
    position: fixed;
    top: 80px;
    left: 16px;
    z-index: var(--z-back);
    background: var(--color-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 8px 14px;
    display: none;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

@supports not (backdrop-filter: blur(1px)) {
    #back-btn { background: var(--color-panel-solid); }
}

#back-btn:hover { background: var(--color-card-hover); }
#back-btn.visible { display: flex; }

.back-arrow { font-size: 16px; color: var(--color-text-muted); line-height: 1; }
.back-info .back-name { color: var(--color-text); font-weight: 500; font-size: 13px; }
.back-info .back-meta { font-size: 10px; color: var(--color-text-muted); }
#back-btn[data-level="3"] .back-name { color: var(--color-spot); }

/* ══════════════════════════════════
   STYLE SWITCHER (top-right)
   ══════════════════════════════════ */

/* ── Share Button (in panel, mobile only) ── */
.share-btn {
    display: none;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 12px;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: background var(--transition-fast);
}

.share-btn:active {
    transform: scale(0.95);
}

@media (max-width: 768px) {
    .share-btn { display: flex; }
}

#style-switcher {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: var(--z-switcher);
    display: flex;
    gap: 4px;
    background: var(--color-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 4px;
}

@supports not (backdrop-filter: blur(1px)) {
    #style-switcher { background: var(--color-panel-solid); }
}

.style-btn {
    width: 36px;
    height: 36px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all var(--transition-fast);
}

.style-btn:hover { background: var(--color-card); color: var(--color-text); }
.style-btn.active { background: rgba(56,189,248,0.15); border-color: rgba(56,189,248,0.3); color: var(--color-accent); }

/* ══════════════════════════════════
   AREA PANEL (Level 1) — Desktop: left sidebar, Mobile: bottom drawer
   ══════════════════════════════════ */

#area-panel {
    position: fixed;
    top: 16px;
    left: 16px;
    bottom: 16px;
    width: var(--panel-width);
    z-index: var(--z-panel);
    background: var(--color-panel);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

@supports not (backdrop-filter: blur(1px)) {
    #area-panel { background: var(--color-panel-solid); }
}

#area-panel.hidden {
    transform: translateX(-110%);
    opacity: 0;
    pointer-events: none;
}

#area-panel > .panel-handle { display: none; }

.area-panel-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.panel-logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.area-panel-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-accent);
}

.area-panel-subtitle {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.area-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.area-panel-content::-webkit-scrollbar { width: 4px; }
.area-panel-content::-webkit-scrollbar-track { background: transparent; }
.area-panel-content::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

/* ── Search Bar ── */
.search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 16px 12px;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 28px;
    font-size: 14px;
    opacity: 0.5;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 10px 36px 10px 40px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

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

.search-input:focus {
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.08);
}

.search-clear {
    position: absolute;
    right: 28px;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 14px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 50%;
    transition: color var(--transition-fast);
}

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

.search-clear.hidden {
    display: none;
}

/* ── Category Filter ── */

.category-filter {
    display: flex;
    gap: 8px;
    padding: 0 16px 12px;
    flex-shrink: 0;
}

.category-filter.spot-filter {
    padding: 4px 0 12px;
}

.filter-pill {
    padding: 6px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    background: var(--color-card);
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.filter-pill:hover {
    background: var(--color-card-hover);
    color: var(--color-text);
}

.filter-pill.active {
    background: var(--color-accent);
    color: #0a0f16;
    border-color: var(--color-accent);
    font-weight: 600;
}

/* ── Category Tags ── */

.cat-tag {
    display: inline-flex;
    align-items: center;
    padding: 1px 6px;
    border-radius: var(--radius-pill);
    font-size: 11px;
    font-weight: 500;
    line-height: 1.4;
    white-space: nowrap;
    margin-left: 4px;
}

.cat-landscape {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
}

.cat-portrait {
    background: rgba(168, 85, 247, 0.15);
    color: #c084fc;
}

.area-card-cats,
.spot-card-cats {
    display: inline;
}

/* ── Search Results ── */
.search-result {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    margin: 0 12px 8px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.search-result:hover {
    background: var(--color-card-hover);
    border-color: rgba(255, 255, 255, 0.15);
}

.search-result-icon {
    font-size: 20px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    flex-shrink: 0;
}

.search-result-icon.area {
    color: var(--color-accent);
}

.search-result-icon.spot {
    color: var(--color-spot);
}

.search-result-info {
    flex: 1;
    min-width: 0;
}

.search-result-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-name mark {
    background: none;
    color: var(--color-accent);
    font-weight: 600;
}

.search-result-meta {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

.search-result-arrow {
    color: var(--color-text-muted);
    font-size: 16px;
    flex-shrink: 0;
}

.search-empty {
    text-align: center;
    padding: 32px 16px;
    color: var(--color-text-muted);
    font-size: 14px;
}

.search-empty-icon {
    font-size: 32px;
    margin-bottom: 8px;
    opacity: 0.5;
}

/* Area cards in the panel */
.area-card {
    display: flex;
    align-items: stretch;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    margin-bottom: 8px;
    transition: all var(--transition-fast);
}

.area-card:hover {
    background: var(--color-card-hover);
    border-color: rgba(255,255,255,0.12);
    transform: translateX(2px);
}

.area-card:active { transform: scale(0.98); }

.area-card.active {
    border-color: var(--color-accent-glow);
    background: rgba(56,189,248,0.08);
}

.area-card-cover {
    width: 90px;
    min-height: 70px;
    flex-shrink: 0;
    overflow: hidden;
    background: rgba(255,255,255,0.03);
}

.area-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.area-card:hover .area-card-cover img { transform: scale(1.05); }

.area-card-no-cover {
    width: 90px;
    min-height: 70px;
    flex-shrink: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 20px;
}

.area-card-body {
    flex: 1;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}

.area-card-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 6px;
}

.area-card-desc {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 3px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.area-card-meta {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.key-badge {
    font-size: 10px;
    color: var(--color-key);
    background: rgba(245,158,11,0.15);
    padding: 1px 7px;
    border-radius: var(--radius-pill);
    white-space: nowrap;
}

.area-card-arrow {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 10px;
    color: var(--color-text-muted);
    font-size: 16px;
    transition: color var(--transition-fast);
}

.area-card:hover .area-card-arrow { color: var(--color-accent); }

/* ══════════════════════════════════
   BOTTOM PANEL (Level 2 / Level 3)
   ══════════════════════════════════ */

#bottom-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-panel);
    background: var(--color-panel);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--color-border);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    transform: translateY(0);
    transition: transform var(--transition-normal);
    will-change: transform;
    overflow: hidden;
}

@supports not (backdrop-filter: blur(1px)) {
    #bottom-panel { background: var(--color-panel-solid); }
}

#bottom-panel.panel-hidden {
    transform: translateY(100%);
    pointer-events: none;
}

#bottom-panel.panel-collapsed {
    transform: translateY(calc(100% - 100px));
}

#bottom-panel.panel-collapsed .route-plan-header {
    cursor: pointer;
}

#bottom-panel.panel-collapsed .route-waypoint-list,
#bottom-panel.panel-collapsed .route-start-indicator,
#bottom-panel.panel-collapsed .route-actions {
    display: none;
}

#bottom-panel.panel-collapsed .route-summary {
    border-top: none;
    padding-top: 0;
    background: transparent;
}

#bottom-panel.panel-collapsed .route-summary-actions {
    display: none;
}

#bottom-panel > .panel-handle { display: none; }

.panel-section { display: none; }
.panel-section.active { display: block; }

/* ── Level 2: Spot Cards ── */
#spot-cards { padding: 10px 16px 16px; }

.spot-cards-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 10px;
}

.spot-cards-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.spot-cards-title { font-size: 14px; font-weight: 500; color: var(--color-text); }
.spot-cards-count { font-size: 11px; color: var(--color-text-muted); }

.cards-scroll {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    scroll-snap-type: x proximity;
}

.cards-scroll::-webkit-scrollbar { display: none; }

.spot-card {
    flex-shrink: 0;
    width: 200px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    scroll-snap-align: start;
    transition: all var(--transition-fast);
}

.spot-card:hover { background: var(--color-card-hover); border-color: rgba(255,255,255,0.12); }
.spot-card:active { transform: scale(0.98); }
.spot-card.active { border-color: var(--color-spot-glow); background: rgba(232,167,60,0.08); }

.spot-card-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    position: relative;
    background: rgba(255,255,255,0.03);
}

.spot-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.spot-card:hover .spot-card-cover img { transform: scale(1.05); }

.spot-card-badge {
    position: absolute;
    top: 6px;
    left: 6px;
    background: rgba(0,0,0,0.6);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-size: 10px;
    color: var(--color-key);
}

.spot-card-body { padding: 10px 12px; }
.spot-card-name { font-size: 13px; font-weight: 500; color: var(--color-text); }
.spot-card-meta { font-size: 11px; color: var(--color-text-muted); margin-top: 3px; }

.spot-card-no-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 24px;
}

/* ── Level 3: Photo Detail ── */
#photo-detail { padding: 10px 16px 16px; }

.photo-detail-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.photo-strip {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    scroll-snap-type: x mandatory;
}

.photo-strip::-webkit-scrollbar { display: none; }

.photo-item {
    flex-shrink: 0;
    width: 220px;
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    scroll-snap-align: center;
    border: 2px solid transparent;
    background: rgba(255,255,255,0.03);
    transition: border-color var(--transition-fast);
}

.photo-item.active { border-color: rgba(232,167,60,0.5); }

.photo-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.photo-item:hover img { transform: scale(1.03); }

.exif-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px 10px 8px;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.photo-item:hover .exif-overlay { opacity: 1; }

.exif-main { font-family: var(--font-mono); font-size: 10px; color: rgba(255,255,255,0.8); }
.exif-sep { color: rgba(255,255,255,0.3); margin: 0 3px; }
.exif-lens { font-size: 9px; color: rgba(255,255,255,0.5); margin-top: 2px; }

.photo-dots { display: flex; justify-content: center; gap: 5px; margin-top: 10px; }

.photo-dot {
    width: 16px;
    height: 3px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.photo-dot.active { width: 20px; background: var(--color-spot); }

.empty-state { text-align: center; padding: 24px 16px; color: var(--color-text-muted); width: 100%; }
.empty-state-icon { font-size: 32px; margin-bottom: 8px; }
.empty-state-text { font-size: 13px; line-height: 1.6; }

/* ══════════════════════════════════
   LIGHTBOX
   ══════════════════════════════════ */

#lightbox {
    position: fixed;
    inset: 0;
    z-index: var(--z-lightbox);
    background: rgba(0,0,0,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#lightbox.active { display: flex; }
#lightbox.fade-in { opacity: 1; }

.lightbox-spot-info {
    position: absolute;
    top: max(12px, env(safe-area-inset-top, 12px));
    left: 12px;
    background: rgba(0,0,0,0.5);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
}

.lightbox-spot-name { font-size: 13px; color: var(--color-spot); font-weight: 500; }
.lightbox-spot-area { font-size: 10px; color: var(--color-text-muted); }

.lightbox-close {
    position: absolute;
    top: max(12px, env(safe-area-inset-top, 12px));
    right: 12px;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    color: var(--color-text-secondary);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 1;
}

.lightbox-close:hover { background: rgba(255,255,255,0.2); color: var(--color-text); }

.lightbox-img {
    max-width: 94vw;
    max-height: 78vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

#lightbox.fade-in .lightbox-img { transform: scale(1); }

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.08);
    border: none;
    border-radius: 50%;
    color: var(--color-text-secondary);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.lightbox-nav:hover { background: rgba(255,255,255,0.15); color: var(--color-text); }
.lightbox-nav-prev { left: 16px; }
.lightbox-nav-next { right: 16px; }

.lightbox-exif {
    position: absolute;
    bottom: max(16px, env(safe-area-inset-bottom, 16px));
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    text-align: center;
    max-width: 90vw;
}

.lightbox-exif-main { font-family: var(--font-mono); font-size: 12px; color: rgba(255,255,255,0.8); }
.lightbox-exif-lens { font-size: 10px; color: rgba(255,255,255,0.5); margin-top: 3px; }
.lightbox-exif-page { font-size: 11px; color: rgba(255,255,255,0.4); margin-top: 4px; }

/* ══════════════════════════════════
   LOADING OVERLAY
   ══════════════════════════════════ */

#loading-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-loading);
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease;
}

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

.loading-spinner { text-align: center; color: var(--color-text-muted); }

.spinner-ring {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

@keyframes spin { to { transform: rotate(360deg); } }
.loading-spinner p { font-size: 13px; }

/* ══════════════════════════════════
   MAPBOX OVERRIDES
   ══════════════════════════════════ */

.mapboxgl-ctrl-group {
    background: var(--color-panel) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border) !important;
    border-radius: var(--radius-sm) !important;
    box-shadow: none !important;
}

.mapboxgl-ctrl-group button { width: 32px !important; height: 32px !important; border-color: var(--color-border) !important; }
.mapboxgl-ctrl-group button + button { border-top: 1px solid var(--color-border) !important; }
.mapboxgl-ctrl-group button .mapboxgl-ctrl-icon { filter: invert(0.8); }

.mapboxgl-ctrl-top-right {
    top: 60px !important;
    right: 16px !important;
}

/* Geolocate control — green dot to distinguish from blue area markers */
.mapboxgl-user-location-accuracy-circle { fill: rgba(52, 211, 153, 0.15); }
.mapboxgl-user-location-dot { background-color: #34d399; }
.mapboxgl-user-location-dot::before { background-color: #34d399; }

.mapboxgl-ctrl-geolocate .mapboxgl-ctrl-icon {
    filter: invert(0.8) !important;
}


.mapboxgl-ctrl-scale {
    background: var(--color-panel) !important;
    border-color: var(--color-text-muted) !important;
    color: var(--color-text-muted) !important;
    font-size: 10px !important;
    border-radius: 4px !important;
}

.mapboxgl-popup-content {
    background: var(--color-panel-solid) !important;
    border: 1px solid var(--color-border) !important;
    border-radius: var(--radius-md) !important;
    padding: 12px 14px !important;
    color: var(--color-text) !important;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5) !important;
    font-family: var(--font-sans) !important;
}

.mapboxgl-popup-close-button { color: var(--color-text-muted) !important; font-size: 18px !important; }
.mapboxgl-popup-close-button:hover { color: var(--color-text) !important; background: transparent !important; }
.mapboxgl-popup-tip { border-top-color: var(--color-panel-solid) !important; }

/* ══════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════ */

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.card-stagger { animation: fadeSlideUp 0.35s ease both; }

/* ══════════════════════════════════
   MOBILE FLOAT BUTTON
   ══════════════════════════════════ */

.float-btn {
    display: none;
    position: fixed;
    z-index: 25;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--color-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--color-text-secondary);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
    border: 1px solid var(--color-border);
    transition: background var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
    touch-action: none;
}

.float-btn.snapping {
    transition: background var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast), left 0.25s ease, right 0.25s ease;
}

@supports not (backdrop-filter: blur(1px)) {
    .float-btn { background: var(--color-panel-solid); }
}

.float-btn:active:not(.dragging) {
    transform: scale(0.92);
}

.float-btn-icon {
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}


.panel-handle { display: none; justify-content: center; padding: 10px 0 4px; cursor: grab; touch-action: none; }
.panel-handle:active { cursor: grabbing; }
.handle-bar { width: 36px; height: 4px; background: rgba(255,255,255,0.25); border-radius: 2px; }

/* ══════════════════════════════════
   RESPONSIVE — Mobile (≤768px)
   ══════════════════════════════════ */

@media (max-width: 768px) {
    /* route-info mobile override moved after base rule — see below .route-info section */

    /* Area panel becomes bottom drawer on mobile */
    #area-panel {
        position: fixed;
        top: auto;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 55vh;
        max-height: 55vh;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        border: none;
        border-top: 1px solid var(--color-border);
        padding-bottom: max(8px, env(safe-area-inset-bottom, 8px));
    }

    #area-panel.hidden {
        transform: translateY(100%);
    }

    #area-panel.expanded {
        height: 85vh;
        max-height: 85vh;
        transition: transform var(--transition-normal), opacity var(--transition-normal),
                    height var(--transition-normal), max-height var(--transition-normal);
    }

    #area-panel > .panel-handle { display: flex; }

    .area-panel-header { display: none; }

    #brand-badge {
        display: flex;
        top: max(10px, env(safe-area-inset-top, 10px));
        left: 10px;
        padding: 8px 12px;
    }

    .brand-logo { width: 26px; height: 26px; }

    .brand-title { font-size: 13px; }
    .brand-subtitle { font-size: 10px; }

    #back-btn {
        top: max(68px, calc(env(safe-area-inset-top, 10px) + 58px));
        left: 10px;
        padding: 6px 12px;
        font-size: 12px;
    }

    #style-switcher {
        top: max(10px, env(safe-area-inset-top, 10px));
        right: 10px;
        padding: 3px;
    }

    .style-btn { width: 32px; height: 32px; font-size: 14px; }


    #bottom-panel {
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        padding-bottom: max(8px, env(safe-area-inset-bottom, 8px));
    }

    #bottom-panel > .panel-handle { display: flex; }

    .spot-card { width: 160px; }
    .photo-item { width: 180px; }
    .photo-item img { height: 120px; }
    .exif-overlay { opacity: 1; }

    .float-btn { display: flex; bottom: 20px; left: 16px; right: auto; }

    .mapboxgl-ctrl-top-right {
        top: 52px !important;
        right: 10px !important;
    }

    .mapboxgl-ctrl-bottom-right {
        right: 10px;
        bottom: 10px;
        transition: bottom 0.2s ease;
    }

    .lightbox-nav { display: none; }
    .lightbox-img { max-width: 98vw; max-height: 70vh; }
    .lightbox-exif { padding: 8px 12px; }
    .lightbox-exif-main { font-size: 10px; }
}

@media (max-width: 480px) {
    #area-panel { height: 50vh; max-height: 50vh; }

    .brand-logo { width: 22px; height: 22px; }
    .panel-logo { width: 32px; height: 32px; }
    .brand-title { font-size: 12px; }
    .brand-subtitle { font-size: 9px; }

    .area-card-cover { width: 75px; min-height: 60px; }
    .area-card-name { font-size: 13px; }

    .spot-card { width: 140px; }
    .spot-card-name { font-size: 12px; }
    .photo-item { width: 160px; }
    .photo-item img { height: 100px; }
}

@media (min-width: 1025px) {
    #bottom-panel {
        left: 5%;
        right: 5%;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    }

    .spot-card { width: 220px; }
    .photo-item { width: 260px; }
    .photo-item img { height: 170px; }
    .lightbox-nav-prev { left: 40px; }
    .lightbox-nav-next { right: 40px; }
}

@media (hover: none) {
    .exif-overlay { opacity: 1; }
}

/* ═══════════════════════════════════
   TOAST NOTIFICATION
   ═══════════════════════════════════ */

.toast {
    position: fixed;
    top: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(-80px);
    z-index: 1500;
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    padding: 10px 20px;
    font-size: 13px;
    font-family: var(--font-sans);
    color: var(--color-text);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    pointer-events: none;
    white-space: nowrap;
    max-width: 90vw;
    text-align: center;
}
.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ═══════════════════════════════════
   ROUTE INFO OVERLAY
   ═══════════════════════════════════ */

.route-info {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    opacity: 0;
    z-index: var(--z-badge);
    background: var(--color-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-family: var(--font-sans);
    color: var(--color-text);
    transition: transform var(--transition-normal), opacity var(--transition-normal), bottom 0.2s ease;
    pointer-events: none;
}
.route-info.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: auto;
}
.route-sep {
    color: var(--color-text-muted);
}

/* ═══════════════════════════════════
   ROUTE PLANNING (Level 4)
   ═══════════════════════════════════ */

.route-plan-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 16px 8px;
}

.route-plan-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-accent);
}

.route-plan-count {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

.route-collapse-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.route-collapse-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.route-clear-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.route-clear-btn:hover {
    color: #f87171;
    border-color: #f87171;
}

.route-start-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}

.route-start-icon { font-size: 14px; }

.route-waypoint-list {
    padding: 8px 0;
    max-height: 40vh;
    overflow-y: auto;
}

.route-empty-hint {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 13px;
    padding: 24px 16px;
}

.route-waypoint-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    transition: background var(--transition-fast);
}

.route-waypoint-item:hover {
    background: var(--color-card-hover);
}

.route-waypoint-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.route-waypoint-info {
    flex: 1;
    min-width: 0;
}

.route-waypoint-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.route-waypoint-area {
    font-size: 11px;
    color: var(--color-text-secondary);
    margin-top: 1px;
}

.route-waypoint-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

.route-wp-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 14px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.route-wp-btn:hover {
    background: var(--color-card);
    color: var(--color-text);
}

.route-wp-btn.remove:hover {
    color: #f87171;
}

.route-wp-btn:disabled {
    opacity: 0.2;
    cursor: default;
    pointer-events: none;
}

.route-wp-btn.set-start {
    font-size: 10px;
    padding: 2px 6px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    width: auto;
    height: auto;
    color: var(--color-text-secondary);
}

.route-wp-btn.set-start:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: rgba(56, 189, 248, 0.1);
}

/* Drag handle */
.route-waypoint-drag {
    color: var(--color-text-muted);
    font-size: 12px;
    cursor: grab;
    padding: 0 2px;
    user-select: none;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.route-waypoint-drag:active {
    cursor: grabbing;
}

/* Drag states */
.route-waypoint-item.dragging {
    opacity: 0.3;
}

.route-waypoint-item.drag-over {
    border-top: 2px solid var(--color-accent);
}

.drag-clone {
    position: fixed;
    z-index: 9999;
    background: var(--color-panel-solid);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    opacity: 0.9;
    pointer-events: none;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.route-actions {
    display: flex;
    gap: 8px;
    padding: 8px 16px;
    border-top: 1px solid var(--color-border);
}

.route-action-btn {
    flex: 1;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 13px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.route-action-btn:hover {
    background: var(--color-card-hover);
}

.route-action-btn:disabled {
    opacity: 0.4;
    cursor: default;
}

.route-sort-btn { color: var(--color-key); }

.route-summary {
    padding: 12px 16px;
    border-top: 1px solid var(--color-border);
    background: rgba(56, 189, 248, 0.05);
}

.route-summary.hidden { display: none; }

.route-summary-info {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.route-summary-actions {
    display: flex;
    gap: 8px;
}

.route-primary-btn {
    flex: 1;
    background: var(--color-accent);
    border: none;
    color: #0a0f16;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.route-primary-btn:hover { opacity: 0.9; }
.route-primary-btn:disabled { opacity: 0.4; cursor: default; }

.route-share-btn {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 13px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.route-share-btn:hover { background: var(--color-card-hover); }

/* ═══════════════════════════════════
   SPOT PICKER OVERLAY
   ═══════════════════════════════════ */

.spot-picker {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60vh;
    max-height: 600px;
    background: var(--color-panel-solid);
    z-index: calc(var(--z-panel) + 5);
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition-normal), opacity var(--transition-fast);
    transform: translateY(0);
}

.spot-picker.hidden {
    transform: translateY(100%);
    pointer-events: none;
    opacity: 0;
}

.spot-picker-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
}

.spot-picker-close {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 18px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spot-picker-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.spot-picker-search {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-bottom: 1px solid var(--color-border);
}

.spot-picker-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.spot-picker-group-header {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-muted);
    padding: 12px 16px 4px;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.spot-picker-add-all {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.spot-picker-add-all:hover {
    background: rgba(56, 189, 248, 0.1);
}

.spot-picker-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.spot-picker-item:hover {
    background: var(--color-card-hover);
}

.spot-picker-check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.spot-picker-item.selected .spot-picker-check {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.spot-picker-item-name {
    font-size: 14px;
    color: var(--color-text);
}

.spot-picker-item.selected .spot-picker-item-name {
    color: var(--color-accent);
}

.spot-picker-key {
    font-size: 11px;
    margin-left: 4px;
}

/* ═══════════════════════════════════
   ROUTE SHARE MODAL
   ═══════════════════════════════════ */

.route-share-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1500;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.route-share-modal.hidden { display: none; }

.route-share-modal-content {
    background: var(--color-panel-solid);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 24px 16px;
    width: 100%;
    max-width: 400px;
}

.route-share-modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 16px;
}

.route-share-option {
    display: block;
    width: 100%;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 15px;
    padding: 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-sans);
    text-align: center;
    margin-bottom: 8px;
    transition: all var(--transition-fast);
}

.route-share-option:hover { background: var(--color-card-hover); }

.route-share-cancel {
    display: block;
    width: 100%;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 14px;
    padding: 12px;
    cursor: pointer;
    font-family: var(--font-sans);
    margin-top: 4px;
}

/* ═══════════════════════════════════
   ROUTE PLANNING: ENTRY BUTTONS
   ═══════════════════════════════════ */

.route-plan-entry-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    flex-shrink: 0;
}

.route-plan-entry-btn:hover {
    background: rgba(56, 189, 248, 0.1);
}

.route-area-btn {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    font-size: 13px;
    padding: 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-sans);
    margin: 8px 16px;
    width: calc(100% - 32px);
    transition: all var(--transition-fast);
}

.route-area-btn:hover {
    background: rgba(56, 189, 248, 0.1);
}

/* ═══════════════════════════════════
   ROUTE PLANNING: MOBILE OVERRIDES
   ═══════════════════════════════════ */

@media (max-width: 768px) {
    .route-actions {
        flex-wrap: wrap;
    }

    .route-waypoint-list {
        max-height: 30vh;
    }

    .route-share-modal-content {
        max-width: 100%;
        padding-bottom: calc(24px + env(safe-area-inset-bottom));
    }

    .spot-picker {
        height: 80vh;
        max-height: none;
    }
}