/* ═══════════════════════════════════════════════════════════════════════════
   Aerial Scans — Stylesheet
   Aesthetic: Dark cartographic / aerospace — warm amber on deep charcoal
   Fonts: Cormorant Garamond (display) + DM Mono (data)
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Custom Properties ─────────────────────────────────────────────────── */
:root {
    --bg:          #0c0d0f;
    --surface:     #131518;
    --surface2:    #1a1c20;
    --border:      #252830;
    --border2:     #2e3138;

    --amber:       #c8922a;
    --amber-hi:    #e0a83a;
    --amber-lo:    #7a5618;
    --amber-glow:  rgba(200,146,42,0.12);

    --text:        #d4cfc8;
    --text-muted:  #7a7870;
    --text-faint:  #3f3e3a;

    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-mono:    'DM Mono', 'Courier New', monospace;

    --radius:      6px;
    --radius-lg:   12px;
    --trans:       180ms cubic-bezier(0.4,0,0.2,1);
}

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

html { font-size: 15px; -webkit-text-size-adjust: 100%; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    font-weight: 300;
    line-height: 1.65;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; background: none; border: none; }
input { font-family: inherit; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }

/* ─── Header ────────────────────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(12,13,15,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 40px;
    gap: 20px;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.drone-icon {
    width: 38px;
    height: 38px;
    color: var(--amber);
    flex-shrink: 0;
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.brand-title {
    font-family: var(--font-display);
    font-size: 1.45rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: #ede8df;
    line-height: 1;
}

.brand-sub {
    font-size: 0.68rem;
    color: var(--amber);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 400;
}

.header-meta { display: flex; align-items: center; gap: 20px; }

.model-count {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.header-rule {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border2) 20%, var(--border2) 80%, transparent);
}

/* ─── Gallery Main ──────────────────────────────────────────────────────── */
.gallery-main {
    flex: 1;
    padding: 40px 40px 60px;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

/* Controls bar */
.controls-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 36px;
}

.search-input {
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.82rem;
    letter-spacing: 0.04em;
    padding: 9px 16px;
    width: min(340px, 100%);
    outline: none;
    transition: border-color var(--trans), box-shadow var(--trans);
}
.search-input::placeholder { color: var(--text-faint); }
.search-input:focus {
    border-color: var(--amber-lo);
    box-shadow: 0 0 0 3px var(--amber-glow);
}

.view-toggle { display: flex; gap: 4px; }
.view-btn {
    width: 34px; height: 34px;
    border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-muted);
    transition: background var(--trans), color var(--trans);
}
.view-btn svg { width: 14px; height: 14px; fill: currentColor; }
.view-btn:hover { background: var(--surface2); color: var(--text); }
.view-btn.active { background: var(--surface2); color: var(--amber); }

/* Model Grid */
.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* List view */
.model-grid.view-list {
    grid-template-columns: 1fr;
    gap: 12px;
}
.model-grid.view-list .model-card .card-link {
    flex-direction: row;
    align-items: center;
}
.model-grid.view-list .card-thumb {
    width: 100px;
    height: 72px;
    flex-shrink: 0;
    border-radius: var(--radius) 0 0 var(--radius);
}
.model-grid.view-list .card-body { padding: 14px 18px; }
.model-grid.view-list .card-desc { display: none; }

/* Card */
.model-card {
    animation: cardReveal 0.5s ease both;
    animation-delay: calc(var(--i) * 40ms);
}

@keyframes cardReveal {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

.card-link {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--trans), box-shadow var(--trans), transform var(--trans);
    height: 100%;
}
.card-link:hover {
    border-color: var(--amber-lo);
    box-shadow: 0 0 0 1px var(--amber-lo), 0 8px 32px rgba(0,0,0,0.5), 0 0 40px var(--amber-glow);
    transform: translateY(-3px);
}

/* Thumbnail */
.card-thumb {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--surface2);
}

.thumb-placeholder {
    width: 100%; height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-faint);
}
.thumb-placeholder svg { width: 52px; height: 52px; }

.ext-badge {
    font-size: 0.62rem;
    letter-spacing: 0.14em;
    color: var(--amber-lo);
    border: 1px solid var(--amber-lo);
    padding: 2px 7px;
    border-radius: 3px;
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(12,13,15,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--trans);
    backdrop-filter: blur(4px);
}
.card-link:hover .card-overlay { opacity: 1; }

.open-label {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--amber-hi);
    text-transform: uppercase;
}

/* Card body */
.card-body { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; gap: 8px; }

.card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 400;
    color: #ede8df;
    line-height: 1.2;
}

.card-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: auto;
    padding-top: 10px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}
.meta-item svg { width: 10px; height: 10px; flex-shrink: 0; }
.meta-size { margin-left: auto; color: var(--text-faint); }

.card-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* Tags */
.tag {
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--amber);
    background: var(--amber-glow);
    border: 1px solid rgba(200,146,42,0.25);
    padding: 2px 8px;
    border-radius: 3px;
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
    padding: 80px 20px;
    color: var(--text-muted);
}
.empty-icon { width: 64px; height: 64px; }
.empty-icon svg { width: 100%; height: 100%; }
.empty-state h2 { font-family: var(--font-display); font-size: 1.6rem; font-weight: 400; color: var(--text); }
.empty-state p { font-size: 0.82rem; max-width: 420px; line-height: 1.7; }
.empty-state code { background: var(--surface2); padding: 1px 6px; border-radius: 3px; color: var(--amber); }

.no-results { text-align: center; padding: 60px; color: var(--text-muted); font-size: 0.82rem; }

/* ─── Footer ────────────────────────────────────────────────────────────── */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 18px 40px;
    font-size: 0.68rem;
    color: var(--text-faint);
    letter-spacing: 0.08em;
    text-align: center;
}

/* ─── Viewer Page ───────────────────────────────────────────────────────── */
.viewer-topbar {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 12px 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    min-width: 0;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: color var(--trans);
}
.back-btn:hover { color: var(--amber); }
.back-btn svg { width: 14px; height: 14px; }

.viewer-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 400;
    color: #ede8df;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.icon-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 6px 12px;
    border-radius: var(--radius);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    border: 1px solid var(--border2);
    transition: color var(--trans), border-color var(--trans), background var(--trans);
}
.icon-btn svg { width: 14px; height: 14px; }
.icon-btn:hover {
    color: var(--amber);
    border-color: var(--amber-lo);
    background: var(--amber-glow);
}

/* Canvas wrapper */
.canvas-wrap {
    position: relative;
    background: #080a0c;
    overflow: hidden;
}

#threeCanvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* Loading overlay */
.load-overlay {
    position: absolute;
    inset: 0;
    background: #080a0c;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: opacity 0.4s;
}
.load-overlay.hidden { opacity: 0; pointer-events: none; }

.load-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    width: 220px;
}

.load-spinner {
    width: 36px; height: 36px;
    border: 2px solid var(--border2);
    border-top-color: var(--amber);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.load-text {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.load-progress-bar {
    width: 100%;
    height: 2px;
    background: var(--border);
    border-radius: 1px;
    overflow: hidden;
}
.load-progress-fill {
    height: 100%;
    background: var(--amber);
    width: 0%;
    transition: width 0.2s;
    border-radius: 1px;
}

.load-percent {
    font-size: 0.68rem;
    color: var(--amber);
    letter-spacing: 0.1em;
}

/* Controls hint */
.controls-hint {
    position: absolute;
    bottom: 56px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 18px;
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    color: rgba(122,120,112,0.7);
    text-transform: uppercase;
    pointer-events: none;
    transition: opacity 1s;
}
.controls-hint.hidden { opacity: 0; }

/* In-viewer toolbar */
.viewer-toolbar {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    background: rgba(19,21,24,0.85);
    border: 1px solid var(--border2);
    border-radius: 100px;
    padding: 6px;
    backdrop-filter: blur(8px);
}

.vt-btn {
    width: 34px; height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: background var(--trans), color var(--trans);
}
.vt-btn svg { width: 15px; height: 15px; }
.vt-btn:hover { background: var(--surface2); color: var(--text); }
.vt-btn.active { background: var(--amber-glow); color: var(--amber); }

/* Info Panel */
.info-panel {
    background: var(--surface);
    border-left: 1px solid var(--border);
    overflow-y: auto;
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

@media (max-width: 900px) {
    .info-panel {
        border-left: none;
        border-top: 1px solid var(--border);
        overflow-y: visible;
    }
}

.info-section { display: flex; flex-direction: column; gap: 10px; }

.info-label {
    font-size: 0.62rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--amber);
    font-weight: 400;
    font-family: var(--font-mono);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.info-text {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.info-dl { display: flex; flex-direction: column; gap: 8px; }

.dl-row {
    display: flex;
    align-items: baseline;
    gap: 10px;
    font-size: 0.76rem;
}
.dl-row dt {
    color: var(--text-muted);
    min-width: 80px;
    flex-shrink: 0;
    font-weight: 300;
}
.dl-row dd {
    color: var(--text);
    word-break: break-word;
    font-weight: 400;
}
.dl-tags { align-items: flex-start; }
.dl-tags dd { display: flex; flex-wrap: wrap; gap: 5px; }

.keyboard-shortcuts .dl-row dd { color: var(--text-muted); }

kbd {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 3px;
    padding: 1px 6px;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--amber);
}

/* ─── Scrollbar ─────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }

/* ─── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .header-inner { padding: 14px 20px; }
    .gallery-main { padding: 24px 20px 40px; }
    .model-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
    .controls-hint { display: none; }
    .viewer-topbar { padding: 10px 16px; }
    .viewer-topbar .icon-btn span { display: none; }
}

@media (max-width: 480px) {
    .brand-sub { display: none; }
    .model-grid { grid-template-columns: 1fr; }
}