:root {
  color-scheme: dark;
  --bg: #0b1117;
  --panel: #111a22;
  --panel-2: #16222c;
  --panel-3: #1d2b36;
  --line: #2b3d49;
  --line-strong: #3d5564;
  --text: #e7edf2;
  --muted: #9badb8;
  --accent: #5fb3d3;
  --accent-strong: #7bc9e6;
  --success: #55b88c;
  --warning: #e6b65c;
  --danger: #ef6a61;
  --shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
  --topbar-h: 64px;
  --timeline-h: 94px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; background: var(--bg); color: var(--text); }
body { min-width: 1060px; }
button, input, select { font: inherit; }
button, select, input { color: var(--text); }
button {
  border: 1px solid var(--line-strong);
  background: #1b2832;
  border-radius: 5px;
  padding: 7px 10px;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 80ms ease;
}
button:hover { background: #243744; border-color: #587283; }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.42; cursor: default; transform: none; }
button.primary { background: #176985; border-color: #2c94b6; }
button.primary:hover { background: #1d7e9f; }
button.danger { color: #ffd7d3; border-color: #8e413c; background: #542b29; }
button.active { border-color: var(--accent); box-shadow: inset 0 0 0 1px rgba(95, 179, 211, 0.35); }
button.full-width { width: 100%; }

input, select {
  border: 1px solid var(--line-strong);
  background: #0d151b;
  border-radius: 4px;
  padding: 6px 8px;
  min-width: 0;
}
input:focus, select:focus, button:focus-visible { outline: 2px solid rgba(95, 179, 211, 0.55); outline-offset: 1px; }
input[type="checkbox"] { accent-color: var(--accent); }

#app-shell {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  grid-template-rows: var(--topbar-h) minmax(0, 1fr) var(--timeline-h);
  width: 100vw;
  height: 100vh;
}

#topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 8px 12px;
  background: linear-gradient(180deg, #14202a, #101820);
  border-bottom: 1px solid var(--line);
  z-index: 20;
}
.brand-block { display: flex; align-items: center; gap: 10px; min-width: 278px; }
.brand-icon { width: 42px; height: 42px; }
.brand-title { font-size: 17px; font-weight: 700; letter-spacing: 0.02em; }
.brand-subtitle { font-size: 11px; color: var(--muted); margin-top: 2px; }
.toolbar { display: flex; align-items: center; gap: 6px; flex: 1; }
.toolbar-separator { width: 1px; height: 28px; background: var(--line); margin: 0 3px; }
.topbar-right { display: flex; align-items: center; gap: 9px; }
.status-pill { border: 1px solid var(--line-strong); border-radius: 999px; padding: 6px 10px; font-size: 12px; color: var(--muted); white-space: nowrap; }
.status-pill[data-level="busy"], .status-pill[data-level="working"] { color: #d7e8ef; border-color: #47768a; }
.status-pill[data-level="warning"] { color: #f3cf88; border-color: #8e713d; }
.status-pill[data-level="error"] { color: #ffaaa3; border-color: #8e413c; }
.status-pill[data-level="ready"] { color: #9ed7bd; border-color: #3f765e; }
#vr-button-host > button { position: static !important; margin: 0 !important; padding: 8px 14px !important; border-radius: 5px !important; opacity: 1 !important; }

.side-panel {
  grid-row: 2;
  background: var(--panel);
  border-right: 1px solid var(--line);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  z-index: 12;
}
.panel-tabs { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); background: #0e171e; }
.panel-tab { border: 0; border-right: 1px solid var(--line); border-radius: 0; padding: 10px 4px; color: var(--muted); background: transparent; }
.panel-tab:last-child { border-right: 0; }
.panel-tab.active { color: var(--text); background: var(--panel-2); box-shadow: inset 0 -2px 0 var(--accent); }
.panel-scroll { overflow-y: auto; padding: 12px; flex: 1; scrollbar-width: thin; }
.tab-page { display: none; }
.tab-page.active { display: block; }
.section-heading { margin: 15px 0 8px; padding-bottom: 5px; border-bottom: 1px solid var(--line); color: #cbd8e0; font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700; }
.section-heading:first-child { margin-top: 0; }
.help-text { color: var(--muted); font-size: 11px; line-height: 1.45; margin: 8px 2px; }
.info-card { border: 1px solid var(--line); background: #0d151b; border-radius: 5px; padding: 9px; font-size: 12px; line-height: 1.45; color: #c8d4db; }
.info-card.muted { color: var(--muted); }
.button-grid { display: grid; gap: 6px; }
.button-grid.two-col { grid-template-columns: 1fr 1fr; }
.field-grid { display: grid; gap: 7px; margin-bottom: 8px; }
.field-grid.two-col { grid-template-columns: 1fr 1fr; }
.field-grid.three-col { grid-template-columns: repeat(3, 1fr); }
.field-grid label, .stack-field { display: flex; flex-direction: column; gap: 4px; color: var(--muted); font-size: 11px; }
.field-grid label { position: relative; }
.field-grid label em { position: absolute; right: 7px; bottom: 7px; color: #758995; font-size: 10px; font-style: normal; pointer-events: none; }
.field-grid label input { padding-right: 32px; }
.stack-field { margin-bottom: 8px; }
.check-row { display: flex; align-items: center; gap: 7px; margin: 8px 0; color: #c1cdd4; font-size: 12px; }
.field-row { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin: 8px 0; color: #c1cdd4; font-size: 12px; }
.field-with-unit { display: flex; align-items: center; gap: 5px; }
.field-with-unit input { width: 78px; }
.field-with-unit em { color: var(--muted); font-style: normal; }
.url-import-row { display: grid; grid-template-columns: 1fr auto; gap: 6px; margin-top: 7px; }
.shortcut-grid { display: grid; grid-template-columns: auto 1fr; gap: 5px 9px; align-items: center; font-size: 11px; color: var(--muted); }
kbd { border: 1px solid var(--line-strong); background: #0d151b; border-radius: 3px; padding: 2px 5px; color: #d7e1e6; font-size: 10px; text-align: center; }

.item-list { display: flex; flex-direction: column; gap: 5px; margin-top: 8px; }
.item-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 4px; background: #0d151b; padding: 7px 8px; font-size: 11px; }
.item-row.selected { border-color: var(--accent); background: #122a34; }
.item-row.programmed { opacity: 0.58; }
.item-main { min-width: 0; }
.item-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: #d8e2e8; }
.item-meta { margin-top: 2px; color: var(--muted); font-size: 10px; }
.item-actions { display: flex; gap: 4px; }
.item-actions button { padding: 4px 6px; font-size: 10px; }
.action-type { display: inline-flex; min-width: 48px; justify-content: center; border: 1px solid var(--line-strong); border-radius: 999px; padding: 1px 5px; margin-right: 5px; font-size: 9px; text-transform: uppercase; color: #b9c7cf; }
.action-type.probe { border-color: #8a7038; color: #e2c070; }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.metric-grid > div { border: 1px solid var(--line); background: #0d151b; border-radius: 4px; padding: 7px; display: flex; justify-content: space-between; align-items: baseline; }
.metric-grid span { color: var(--muted); font-size: 10px; }
.metric-grid strong { font-size: 12px; }

#viewport-wrap { grid-column: 2; grid-row: 2; position: relative; overflow: hidden; background: radial-gradient(circle at 50% 42%, #1a2a34 0, #0b1117 72%); }
#viewport { width: 100%; height: 100%; display: block; touch-action: none; }
#viewport-overlay { position: absolute; inset: 0; pointer-events: none; }
#viewport-overlay button, #viewport-overlay input, #viewport-overlay select { pointer-events: auto; }
.floating-toolbar { position: absolute; top: 12px; left: 12px; display: flex; gap: 5px; background: rgba(12, 19, 25, 0.82); border: 1px solid var(--line); border-radius: 6px; padding: 5px; box-shadow: var(--shadow); backdrop-filter: blur(8px); }
.hud-card { position: absolute; top: 12px; right: 12px; width: 220px; background: rgba(12, 19, 25, 0.84); border: 1px solid var(--line); border-radius: 6px; padding: 9px; box-shadow: var(--shadow); backdrop-filter: blur(8px); }
.collision-card { top: 129px; }
.collision-card[data-level="warning"] { border-color: #8e713d; }
.collision-card[data-level="error"] { border-color: #8e413c; box-shadow: 0 0 0 1px rgba(255, 90, 80, 0.15), var(--shadow); }
.collision-card[data-level="ready"] { border-color: #3f765e; }
.hud-title { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; }
.hud-value { margin: 4px 0 7px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hud-row { display: flex; justify-content: space-between; gap: 8px; font-size: 11px; margin-top: 3px; }
.hud-row span { color: var(--muted); }
.hud-row strong { text-align: right; }
.axis-readout { position: absolute; bottom: 12px; left: 12px; display: grid; grid-template-columns: repeat(6, minmax(82px, 1fr)); gap: 5px; background: rgba(12, 19, 25, 0.84); border: 1px solid var(--line); border-radius: 6px; padding: 6px; box-shadow: var(--shadow); backdrop-filter: blur(8px); }
.axis-readout > div { display: grid; grid-template-columns: 16px 1fr auto; align-items: center; gap: 3px; }
.axis-readout span { color: var(--accent-strong); font-size: 10px; font-weight: 700; }
.axis-readout input { width: 100%; min-width: 0; padding: 4px 5px; font-size: 11px; }
.axis-readout em { color: var(--muted); font-size: 9px; font-style: normal; }
.loading-overlay { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 12px; background: rgba(7, 11, 15, 0.72); pointer-events: auto; }
.loading-overlay.hidden { display: none; }
.spinner { width: 34px; height: 34px; border: 3px solid rgba(255,255,255,0.18); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

#timeline-panel { grid-column: 1 / -1; grid-row: 3; display: grid; grid-template-columns: 330px 1fr; border-top: 1px solid var(--line); background: #0e171e; z-index: 18; }
.timeline-controls { display: flex; align-items: center; gap: 6px; padding: 10px 12px; border-right: 1px solid var(--line); }
.speed-control { display: flex; align-items: center; gap: 5px; margin-left: auto; color: var(--muted); font-size: 11px; }
.speed-control select { padding: 5px; }
.timeline-main { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; padding: 10px 14px; }
#timeline-track-wrap { position: relative; height: 52px; }
#timeline-track { position: absolute; left: 0; right: 0; top: 9px; height: 25px; border: 1px solid var(--line-strong); border-radius: 4px; background: #091016; overflow: hidden; }
#timeline-safe-bar { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(85,184,140,0.18), rgba(95,179,211,0.12)); }
#timeline-markers { position: absolute; inset: 0; }
.timeline-marker { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--danger); transform: translateX(-1px); }
.timeline-marker.warning { background: var(--warning); }
.timeline-marker.probe { background: #d2a64b; height: 10px; bottom: 0; top: auto; }
.timeline-marker.action { background: rgba(157, 190, 208, 0.6); height: 6px; bottom: 0; top: auto; }
#timeline-playhead { position: absolute; top: 0; bottom: 0; width: 2px; background: #ffffff; box-shadow: 0 0 5px rgba(255,255,255,0.8); transform: translateX(-1px); }
#timeline-slider { position: absolute; left: 0; right: 0; bottom: 0; width: 100%; margin: 0; accent-color: var(--accent); }
.timeline-readout { display: flex; gap: 5px; align-items: baseline; min-width: 118px; justify-content: flex-end; color: var(--muted); font-size: 12px; }
.timeline-readout strong { color: var(--text); font-size: 14px; }

#toast-host { position: fixed; right: 14px; bottom: calc(var(--timeline-h) + 14px); display: flex; flex-direction: column; gap: 7px; z-index: 100; pointer-events: none; }
.toast { max-width: 360px; border: 1px solid var(--line-strong); background: rgba(16, 24, 32, 0.95); border-radius: 6px; padding: 9px 12px; box-shadow: var(--shadow); font-size: 12px; animation: toast-in 160ms ease-out; }
.toast.warning { border-color: #8e713d; }
.toast.error { border-color: #8e413c; }
.toast.success { border-color: #3f765e; }
@keyframes toast-in { from { opacity: 0; transform: translateY(5px); } }

@media (max-width: 1280px) {
  #app-shell { grid-template-columns: 300px minmax(0, 1fr); }
  #timeline-panel { grid-template-columns: 300px 1fr; }
  .brand-block { min-width: 245px; }
  #topbar { gap: 10px; }
  .toolbar button { padding: 7px 8px; }
  .axis-readout { grid-template-columns: repeat(3, minmax(100px, 1fr)); }
}

/* Spatial registration and part-placement controls */
#vr-button-host { display: flex; align-items: center; gap: 5px; }
#vr-button-host > button { min-width: 74px; font-size: 11px !important; white-space: nowrap; }
.button-grid .full-span { grid-column: 1 / -1; }
#room-anchor-status[data-level="working"] { border-color: #47768a; color: #d7e8ef; }
#room-anchor-status[data-level="warning"] { border-color: #8e713d; color: #f3cf88; }
#room-anchor-status[data-level="error"] { border-color: #8e413c; color: #ffaaa3; }
#room-anchor-status[data-level="ready"] { border-color: #3f765e; color: #b8dfcb; }
.item-actions { flex-wrap: wrap; justify-content: flex-end; }
.item-row.asset-selected { border-color: var(--accent); background: #122a34; }
.item-row.asset-locked { opacity: 0.72; }
.room-pose-grid input { font-variant-numeric: tabular-nums; }