*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --bg: #1a1a1e;
  --surface: #25252b;
  --surface2: #2e2e36;
  --border: #3a3a46;
  --text: #e0e0e8;
  --text-dim: #888898;
  --accent: #5d9cf5;
  --accent-dim: #3a6bbf;
  --danger: #e05555;
  --green: #55c070;
  --font: 'Segoe UI', system-ui, sans-serif;
  --mono: 'Consolas', 'Fira Code', monospace;
  --sidebar-w: 260px;
}

html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--font);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
}

/* ── Layout ──────────────────────────────────── */
.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.brand h1 {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
}

.load-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.url-group {
  display: flex;
  gap: 4px;
}

.top-track-picker {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.top-track-picker[hidden] {
  display: none;
}

.top-track-picker select {
  width: 220px;
  max-width: 28vw;
}

.main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
  flex-shrink: 0;
}

.panel {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.panel h2 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}

/* ── Viewport ────────────────────────────────── */
.viewport-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.viewport {
  flex: 1;
  position: relative;
  background: #151417;
  overflow: hidden;
  cursor: crosshair;
}

.viewport canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.nav-hint {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.55);
  color: #aaa;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 4px;
  pointer-events: none;
  white-space: nowrap;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(10,10,16,0.8);
  z-index: 10;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

#loading-msg { color: var(--text-dim); font-size: 12px; }

/* ── Controls ────────────────────────────────── */
button {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
  font-family: var(--font);
  white-space: nowrap;
}

button:hover { background: var(--border); }
button.quiet { color: var(--text-dim); font-size: 11px; }
button.full-btn { width: 100%; margin-top: 6px; }

input[type="url"], input[type="text"] {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 8px;
  font-size: 12px;
  font-family: var(--mono);
  width: 240px;
}

input[type="url"]:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--accent-dim);
}

.full-select {
  width: 100%;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 8px;
  font-size: 12px;
}

.toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 8px;
  margin-bottom: 8px;
}

.toggle-grid label {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  font-size: 12px;
}

input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
  font-size: 12px;
}

.slider-row label { color: var(--text-dim); min-width: 60px; }
.slider-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.slider-row span { min-width: 28px; text-align: right; font-family: var(--mono); }

/* ── Minimap ────────────────────────────────── */
.minimap {
  display: block;
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1;
  height: auto !important;
  background: #101014;
  border: 1px solid var(--border);
  cursor: crosshair;
  image-rendering: pixelated;
}

/* ── Track info ──────────────────────────────── */
.kv-list {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 8px;
  row-gap: 3px;
  font-size: 12px;
}

.kv-list dt {
  color: var(--text-dim);
  white-space: nowrap;
}

.kv-list dd {
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--mono);
  font-size: 11px;
}

/* ── Scrollbar ───────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }