:root {
  --bg: #101418;
  --panel: #1a2027;
  --panel-2: #222b34;
  --line: #2c3742;
  --text: #e7edf3;
  --muted: #9fb0c0;
  --accent: #4c9aff;
  --accent-press: #357ae0;
  --danger: #ff6b6b;
  --ok: #56d364;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.app-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px calc(12px + env(safe-area-inset-top));
  padding-top: max(12px, env(safe-area-inset-top));
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.app-bar h1 { margin: 0; font-size: 1.2rem; letter-spacing: 0.5px; }
.tagline { color: var(--muted); font-size: 0.85rem; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
}

.viewer-wrap {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
model-viewer {
  width: 100%;
  height: min(55vh, 420px);
  background: linear-gradient(#1d2630, #141a20);
  --poster-color: transparent;
}
.poster {
  display: grid;
  place-items: center;
  height: 100%;
  color: var(--muted);
}
.ar-button {
  position: absolute;
  bottom: 12px;
  right: 12px;
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: grid;
  gap: 12px;
}
.panel h2 { margin: 0; font-size: 1rem; color: var(--muted); font-weight: 600; }

.field { display: grid; gap: 6px; }
.field > span { font-size: 0.85rem; color: var(--muted); }
.field.range > span { display: flex; justify-content: space-between; }

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
}
input[type="range"] { width: 100%; accent-color: var(--accent); }
input[type="file"] { color: var(--muted); font-size: 0.9rem; }

.offset {
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.offset legend { color: var(--muted); font-size: 0.8rem; padding: 0 4px; }
.offset label { display: grid; gap: 4px; font-size: 0.8rem; color: var(--muted); }

.row { display: flex; gap: 8px; flex-wrap: wrap; }
.list-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:active { background: var(--accent-press); }
.btn.small { padding: 7px 10px; font-size: 0.85rem; }
.btn.danger { color: var(--danger); }

.status { margin: 0; font-size: 0.85rem; color: var(--muted); min-height: 1.2em; }
.status.error { color: var(--danger); }
.status.ok { color: var(--ok); }

.placement-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.placement-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  display: grid;
  gap: 8px;
  background: var(--panel-2);
}
.placement-item .pi-name { font-weight: 600; }
.placement-item .pi-meta { font-size: 0.8rem; color: var(--muted); display: grid; gap: 2px; }
.placement-item .pi-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.app-foot {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 16px calc(24px + env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}