/* ── Reset & Base ────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #0a0e17;
  --surface: #111827;
  --surface-2: #1a2236;
  --border: rgba(255,255,255,0.06);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --accent: #00C9A7;
  --accent-glow: rgba(0,201,167,0.25);
  --purple: #845EF7;
  --red: #FF6B6B;
  --orange: #FFA94D;
  --blue: #339AF0;
  --green: #20C997;
  --font: 'Inter', -apple-system, sans-serif;
  --radius: 12px;
  --panel-w: 360px;
}
html, body { width: 100%; height: 100%; overflow: hidden; font-family: var(--font); background: var(--bg); color: var(--text); }
canvas#scene { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; }

/* ── Loading Screen ──────────────────────────────── */
#loading-screen {
  position: fixed; inset: 0; z-index: 9999; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
#loading-screen.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-content { text-align: center; }
.loader-content h1 { font-size: 3rem; font-weight: 800; letter-spacing: 0.3em; margin-bottom: 0.25rem; color: #fff; }
.loader-content p { font-size: 0.85rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 2rem; }
.loader-ring {
  width: 64px; height: 64px; border: 2px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; margin: 0 auto 1.5rem; animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader-bar { width: 240px; height: 3px; background: var(--surface-2); border-radius: 2px; margin: 0 auto 0.5rem; overflow: hidden; }
.loader-progress { height: 100%; width: 0%; background: var(--accent); transition: width 0.3s ease; }
.loader-pct { font-size: 0.75rem; color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* ── Top Bar ─────────────────────────────────────── */
#top-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  background: linear-gradient(180deg, rgba(10,14,23,0.95) 0%, rgba(10,14,23,0.7) 100%);
  backdrop-filter: blur(20px); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon { width: 36px; height: 36px; color: var(--accent); }
.brand-icon svg { width: 100%; height: 100%; }
.brand h1 { font-size: 0.95rem; font-weight: 700; letter-spacing: 0.15em; line-height: 1.2; }
.brand .accent { color: var(--accent); font-weight: 600; }
.brand .subtitle { font-size: 0.65rem; color: var(--text-dim); letter-spacing: 0.08em; font-weight: 400; }

.controls-nav { display: flex; gap: 4px; }
.nav-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 16px; border: 1px solid transparent; border-radius: 8px;
  background: transparent; color: var(--text-dim); cursor: pointer;
  font-family: var(--font); font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.04em; transition: all 0.2s ease;
}
.nav-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.nav-btn:hover { background: var(--surface); color: var(--text); border-color: var(--border); }
.nav-btn.active { background: var(--surface-2); color: #fff; border-color: var(--accent); box-shadow: 0 0 12px var(--accent-glow); }

.header-meta { display: flex; gap: 16px; font-size: 0.7rem; color: var(--text-dim); font-variant-numeric: tabular-nums; }
.header-meta .coord::before { content: '📍 '; }
.header-meta .elev::before { content: '▲ '; }

/* ── Left Panel ──────────────────────────────────── */
#info-panel {
  position: fixed; top: 80px; left: 16px; bottom: 64px;
  width: var(--panel-w); z-index: 90;
  background: rgba(17,24,39,0.88); backdrop-filter: blur(24px);
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow-y: auto; overflow-x: hidden;
  scrollbar-width: thin; scrollbar-color: var(--surface-2) transparent;
}
#info-panel::-webkit-scrollbar { width: 4px; }
#info-panel::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 2px; }

.panel-section { padding: 24px; animation: fadeIn 0.4s ease; }
.panel-section.hidden { display: none; }
.panel-section h2 {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* Stats */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.stat-card {
  background: var(--surface-2); border-radius: 10px; padding: 14px 12px;
  border: 1px solid var(--border); text-align: center;
  transition: border-color 0.2s;
}
.stat-card:hover { border-color: var(--accent); }
.stat-value { display: block; font-size: 1.4rem; font-weight: 800; color: #fff; line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 0.6rem; color: var(--text-dim); letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; }
.panel-desc { font-size: 0.8rem; line-height: 1.65; color: var(--text-dim); }
.panel-desc strong { color: var(--text); }

/* Districts */
.district-list { display: flex; flex-direction: column; gap: 8px; }
.district-card {
  background: var(--surface-2); border-radius: 10px; padding: 14px 16px;
  border-left: 3px solid var(--accent); cursor: pointer;
  transition: all 0.2s ease;
}
.district-card:hover { background: rgba(26,34,54,0.9); transform: translateX(4px); }
.district-card h4 { font-size: 0.85rem; font-weight: 600; margin-bottom: 3px; color: #fff; }
.district-card p { font-size: 0.72rem; color: var(--text-dim); line-height: 1.5; }
.district-card .district-type {
  display: inline-block; font-size: 0.6rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 2px 8px; border-radius: 4px; margin-top: 6px;
  background: rgba(0,201,167,0.1); color: var(--accent);
}

/* Infrastructure */
.infra-list { display: flex; flex-direction: column; gap: 12px; }
.infra-item {
  display: flex; align-items: flex-start; gap: 12px;
  background: var(--surface-2); border-radius: 10px; padding: 14px;
  border: 1px solid var(--border);
}
.infra-icon {
  width: 36px; height: 36px; border-radius: 8px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.infra-icon.metro { background: rgba(51,154,240,0.15); border: 1px solid rgba(51,154,240,0.3); }
.infra-icon.metro::after { content: '🚇'; font-size: 16px; }
.infra-icon.airport { background: rgba(132,94,247,0.15); border: 1px solid rgba(132,94,247,0.3); }
.infra-icon.airport::after { content: '✈️'; font-size: 16px; }
.infra-icon.highway { background: rgba(255,169,77,0.15); border: 1px solid rgba(255,169,77,0.3); }
.infra-icon.highway::after { content: '🛣️'; font-size: 16px; }
.infra-icon.zede { background: rgba(32,201,151,0.15); border: 1px solid rgba(32,201,151,0.3); }
.infra-icon.zede::after { content: '🏭'; font-size: 16px; }
.infra-item h4 { font-size: 0.82rem; font-weight: 600; color: #fff; margin-bottom: 2px; }
.infra-item p { font-size: 0.7rem; color: var(--text-dim); }

/* Economy */
.sector-chart { height: 12px; border-radius: 6px; overflow: hidden; display: flex; margin-bottom: 16px; }
.sector-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.sector-item { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; }
.sector-item span:nth-child(2) { flex: 1; color: var(--text-dim); }
.sector-item strong { color: #fff; font-variant-numeric: tabular-nums; }
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot.services { background: var(--accent); }
.dot.industrial { background: var(--orange); }
.dot.manufacturing { background: var(--blue); }
.dot.agriculture { background: var(--green); }

.key-industries h3 {
  font-size: 0.65rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-dim); margin-bottom: 10px;
}
.industry-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 0.68rem; padding: 4px 10px; border-radius: 6px;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-dim); font-weight: 500;
}

/* ── Tooltip ─────────────────────────────────────── */
#district-tooltip {
  position: fixed; z-index: 200; pointer-events: none;
  background: rgba(17,24,39,0.95); backdrop-filter: blur(16px);
  border: 1px solid var(--accent); border-radius: 10px;
  padding: 16px 20px; min-width: 220px; max-width: 300px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5), 0 0 16px var(--accent-glow);
  transition: opacity 0.15s ease;
}
#district-tooltip.hidden { opacity: 0; visibility: hidden; }
#district-tooltip h3 { font-size: 0.9rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
#district-tooltip p { font-size: 0.72rem; color: var(--text-dim); line-height: 1.5; margin-bottom: 8px; }
.tt-stats { display: flex; gap: 12px; }
.tt-stats .tt-stat { text-align: center; }
.tt-stats .tt-val { display: block; font-size: 1rem; font-weight: 700; color: var(--accent); }
.tt-stats .tt-lbl { font-size: 0.58rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; }

/* ── Bottom Bar ──────────────────────────────────── */
#bottom-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
  height: 48px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  background: linear-gradient(0deg, rgba(10,14,23,0.95) 0%, rgba(10,14,23,0.7) 100%);
  backdrop-filter: blur(20px); border-top: 1px solid var(--border);
}
.legend { display: flex; gap: 16px; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.68rem; color: var(--text-dim); }
.swatch { width: 10px; height: 10px; border-radius: 3px; flex-shrink: 0; }
.controls-hint { display: flex; gap: 16px; font-size: 0.65rem; color: var(--text-dim); }
.controls-hint span { opacity: 0.6; }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 1100px) {
  :root { --panel-w: 300px; }
}
@media (max-width: 860px) {
  #info-panel { left: 8px; right: 8px; top: auto; bottom: 56px; width: auto; max-height: 45vh; border-radius: 12px 12px 0 0; }
  .nav-btn span { display: none; }
  .header-meta { display: none; }
  .legend { flex-wrap: wrap; gap: 8px; }
}