:root {
  --bg: #0e1116;
  --bg2: #161b22;
  --panel: rgba(22, 27, 34, 0.86);
  --border: rgba(240, 246, 252, 0.10);
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #ff8a3d;
  --accent2: #3fb6ff;
  --radius: 12px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); overflow: hidden; }
#viewport { position: fixed; inset: 0; }
#viewport canvas { display: block; outline: none; }

.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 16px; pointer-events: none;
  background: linear-gradient(to bottom, rgba(14, 17, 22, 0.9), rgba(14, 17, 22, 0));
}
.topbar > * { pointer-events: auto; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand h1 { margin: 0; font-size: 17px; letter-spacing: 0.2px; }
.brand p { margin: 2px 0 0; color: var(--muted); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.logo {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background:
    linear-gradient(var(--bg2), var(--bg2)) padding-box,
    conic-gradient(from 210deg, var(--accent), var(--accent2), var(--accent)) border-box;
  border: 3px solid transparent;
  box-shadow: inset 0 0 0 3px var(--bg2), inset 0 0 0 6px rgba(255, 138, 61, 0.55);
}
nav { display: flex; gap: 6px; }
nav a {
  color: var(--text); text-decoration: none; font-size: 13px; padding: 7px 11px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--panel); backdrop-filter: blur(8px);
}
nav a:hover { border-color: var(--accent); }

.panel {
  position: fixed; z-index: 4; top: 72px; right: 16px; width: 252px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  backdrop-filter: blur(10px); font-size: 13px; max-height: calc(100% - 96px); overflow: auto;
}
.panel-toggle {
  display: none; width: 100%; text-align: left; background: none; color: var(--text);
  border: 0; padding: 12px 14px; font: inherit; font-weight: 600; cursor: pointer;
}
.panel-body { padding: 4px 14px 14px; }
.panel section + section { border-top: 1px solid var(--border); margin-top: 10px; padding-top: 4px; }
.panel h2 { font-size: 11px; text-transform: uppercase; letter-spacing: 1.2px; color: var(--muted); margin: 10px 0 8px; }
.btn-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin-bottom: 10px; }
button {
  font: inherit; color: var(--text); background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 4px; cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.active { background: rgba(255, 138, 61, 0.18); border-color: var(--accent); }
.slider { display: grid; grid-template-columns: 64px 1fr; align-items: center; gap: 8px; margin: 6px 0; color: var(--muted); }
input[type=range] { width: 100%; accent-color: var(--accent); }
.check { display: flex; gap: 8px; align-items: center; margin: 6px 0; color: var(--text); cursor: pointer; }
input[type=checkbox] { accent-color: var(--accent); }
.layers { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 8px; }
.layers .check { margin: 3px 0; font-size: 12.5px; }
.legend ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 5px; color: var(--muted); font-size: 12px; }
.legend i { display: inline-block; width: 18px; height: 4px; border-radius: 2px; background: var(--c); margin-right: 8px; vertical-align: middle; }

.info {
  position: fixed; z-index: 4; left: 16px; bottom: 16px; width: min(360px, calc(100% - 32px));
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  backdrop-filter: blur(10px); padding: 14px 16px; font-size: 13px;
}
.info .close { position: absolute; top: 8px; right: 8px; width: 28px; height: 28px; padding: 0; font-size: 18px; line-height: 1; }
.info h3 { margin: 0 0 2px; font-size: 18px; }
.info .sub { color: var(--muted); margin: 0 0 10px; }
.info dl { display: grid; grid-template-columns: 96px 1fr; gap: 5px 10px; margin: 0 0 12px; }
.info dt { color: var(--muted); }
.info dd { margin: 0; }
.info .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tag { font-size: 11.5px; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--border); background: rgba(255,255,255,.04); }
.tag.warn { border-color: rgba(255, 176, 46, .6); color: #ffcf7a; }
.tag.ok { border-color: rgba(63, 182, 255, .6); color: #9bd9ff; }
.info .actions { display: flex; flex-wrap: wrap; gap: 8px; }
.info .actions button { padding: 7px 12px; }

/* The camera preview: the frame is read back from WebGL into the panel's own canvas (rows bottom-up: flipped). */
#camSection .btn-row { grid-template-columns: 1fr; }
.campreview {
  position: fixed; z-index: 5; right: 280px; bottom: 16px; width: 384px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  backdrop-filter: blur(10px); font-size: 12.5px; box-shadow: 0 12px 32px rgba(0, 0, 0, .35);
}
.campreview header { display: flex; align-items: center; gap: 8px; padding: 7px 7px 7px 12px; }
.campreview header strong { flex: 1; font-size: 13px; font-weight: 600; }
.campreview .rec { width: 8px; height: 8px; border-radius: 50%; background: #ff4d4f; animation: rec 1.6s ease-in-out infinite; }
@keyframes rec { 50% { opacity: .3; } }
.campreview header button { padding: 4px 10px; font-size: 12px; }
.campreview header button[aria-pressed=true] { background: rgba(255, 214, 102, .16); border-color: #ffd666; color: #ffe7a3; }
.campreview .close { width: 26px; height: 26px; padding: 0; font-size: 16px; line-height: 1; }
.campreview .screen { display: block; width: 100%; aspect-ratio: 4 / 3; background: #000; transform: scaleY(-1); }
.campreview footer { padding: 6px 12px; color: var(--muted); font-size: 11.5px; }

.hint {
  position: fixed; z-index: 3; left: 50%; bottom: 14px; transform: translateX(-50%);
  color: var(--muted); font-size: 12px; background: var(--panel); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px; pointer-events: none; transition: opacity .6s;
}
.loading {
  position: fixed; inset: 0; display: grid; place-items: center; z-index: 10;
  background: var(--bg); color: var(--muted); font-size: 14px; transition: opacity .5s;
}
.loading.done { opacity: 0; pointer-events: none; }
.label3d {
  font: 600 11px/1 Inter, system-ui, sans-serif; color: #0e1116; background: rgba(255, 255, 255, .85);
  padding: 3px 6px; border-radius: 6px; pointer-events: none; white-space: nowrap;
}

@media (max-width: 720px) {
  .brand p { display: none; }
  nav a { padding: 6px 9px; font-size: 12px; }
  .panel { top: auto; bottom: 16px; right: 16px; left: 16px; width: auto; max-height: 52%; }
  .panel-toggle { display: block; }
  .panel.collapsed .panel-body { display: none; }
  .info { bottom: auto; top: 64px; }
  .hint { display: none; }
  .campreview { left: 16px; right: 16px; width: auto; bottom: 70px; }
}
@media (min-width: 721px) and (max-width: 1100px) {
  .campreview { right: 16px; width: 336px; }
}