:root {
  color-scheme: dark;
  --bg: #071622;
  --panel: #102a3b;
  --line: #41667a;
  --text: #f4f8fc;
  --muted: #b8cbe0;
  --cyan: #49ded1;
  --blue: #2479ad;
  --amber: #ffc66b;
}
* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #07131d;
  color: var(--text);
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
}
.app-shell {
  width: 100vw;
  height: 100vh;
  display: grid;
  grid-template-rows: 104px minmax(0, 1fr) 112px;
  background: radial-gradient(circle at 35% 20%, #1c4256, #07131d 58%);
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3.35vw;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 27, 41, 0.94);
}
.topbar p,
.eyebrow {
  margin: 0 0 7px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.topbar h1 {
  margin: 0;
  font-size: 31px;
  line-height: 1.25;
}
.build {
  text-align: right;
}
.build span,
.build b {
  display: block;
}
.build span {
  color: var(--muted);
  font-size: 13px;
}
.build b {
  margin-top: 7px;
  color: #dff9f6;
  font:
    600 13px Consolas,
    monospace;
}
.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: 74% 26%;
}
.viewport {
  position: relative;
  min-width: 0;
  overflow: hidden;
  background: linear-gradient(#375568, #1a3343);
  border-right: 1px solid var(--line);
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
}
.panel {
  padding: 28px 30px;
  background: linear-gradient(
    160deg,
    rgba(20, 52, 70, 0.98),
    rgba(9, 27, 41, 0.98)
  );
  overflow: auto;
}
.panel h2 {
  margin: 0;
  font-size: 25px;
}
.panel > p:not(.eyebrow) {
  margin: 9px 0 22px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
nav {
  display: grid;
  gap: 8px;
}
nav button {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  min-height: 60px;
  padding: 8px 12px;
  border: 1px solid #3d6378;
  background: #15364a;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}
nav button:hover,
nav button.active {
  border-color: var(--cyan);
  background: #1a4d62;
}
nav button b {
  color: var(--cyan);
  font:
    700 18px Consolas,
    monospace;
}
nav button span {
  font-size: 15px;
  font-weight: 700;
}
nav button em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}
.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 20px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.metrics div {
  padding: 12px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.metrics span,
.metrics b {
  display: block;
}
.metrics span {
  color: var(--muted);
  font-size: 11px;
}
.metrics b {
  margin-top: 6px;
  font:
    600 12px Consolas,
    monospace;
}
.asset-note {
  margin-top: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  background: #0a2435;
}
.asset-note span {
  display: block;
  color: var(--muted);
  font-size: 11px;
}
.asset-note code {
  display: block;
  margin-top: 7px;
  color: #dff9f6;
  font-size: 11px;
  overflow-wrap: anywhere;
}
.asset-note p {
  margin: 10px 0 0;
  color: var(--amber);
  font-size: 12px;
  line-height: 1.5;
}
.loading,
.error {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle, #274b5d, #0b2231 64%);
  transition: opacity 0.45s ease;
}
.loading.done {
  opacity: 0;
  pointer-events: none;
}
.loading strong {
  margin-top: 22px;
  font-size: 22px;
}
.loading p {
  margin: 9px 0 18px;
  color: var(--muted);
}
.loader-visual {
  position: relative;
  width: 150px;
  height: 96px;
  perspective: 240px;
}
.loader-visual i {
  position: absolute;
  left: 25px;
  width: 100px;
  height: 56px;
  border: 1px solid rgba(73, 222, 209, 0.72);
  background: rgba(73, 222, 209, 0.08);
  transform: rotateX(64deg) rotateZ(-28deg);
  animation: stack 1.8s ease-in-out infinite;
}
.loader-visual i:nth-child(2) {
  animation-delay: 0.18s;
}
.loader-visual i:nth-child(3) {
  animation-delay: 0.36s;
}
.loader-visual span {
  position: absolute;
  left: 72px;
  top: 36px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 24px 9px rgba(73, 222, 209, 0.5);
  animation: pulse 1.2s ease-in-out infinite;
}
.progress {
  width: 310px;
  height: 5px;
  background: #173f53;
  overflow: hidden;
}
.progress i {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #2f8eb4, var(--cyan));
  transition: width 0.2s ease;
}
.loading small {
  margin-top: 9px;
  color: var(--cyan);
  font:
    13px Consolas,
    monospace;
}
.error {
  background: rgba(14, 30, 40, 0.96);
}
.error[hidden] {
  display: none;
}
.error p {
  max-width: 500px;
  color: var(--muted);
}
.error button,
.controls button {
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  background: #183c52;
  color: var(--text);
  cursor: pointer;
}
.scene-chip {
  position: absolute;
  left: 24px;
  bottom: 22px;
  z-index: 4;
  min-width: 280px;
  padding: 13px 17px;
  border-left: 3px solid var(--cyan);
  background: rgba(8, 30, 43, 0.86);
  backdrop-filter: blur(7px);
}
.scene-chip span,
.scene-chip b {
  display: block;
}
.scene-chip span {
  color: var(--cyan);
  font:
    12px Consolas,
    monospace;
}
.scene-chip b {
  margin-top: 5px;
  font-size: 18px;
}
.gantry-risk {
  position: absolute;
  right: 22px;
  top: 22px;
  padding: 9px 12px;
  border: 1px solid var(--amber);
  background: rgba(67, 46, 18, 0.88);
  color: #ffe2ac;
  font-size: 12px;
}
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3.35vw;
  border-top: 1px solid var(--line);
  background: #0d283b;
}
.controls > div:first-child span,
.controls > div:first-child b {
  display: block;
}
.controls > div:first-child span {
  color: var(--muted);
  font-size: 12px;
}
.controls > div:first-child b {
  margin-top: 6px;
  font-size: 17px;
}
.control-actions {
  display: flex;
  gap: 8px;
}
.controls button.primary {
  background: #1478ad;
  border-color: #38a5d7;
}
@keyframes stack {
  0%,
  100% {
    transform: translateY(0) rotateX(64deg) rotateZ(-28deg);
    opacity: 0.35;
  }
  50% {
    transform: translateY(-14px) rotateX(64deg) rotateZ(-28deg);
    opacity: 1;
  }
}
@keyframes pulse {
  50% {
    transform: scale(1.5);
    opacity: 0.65;
  }
}
@media (max-width: 1200px) {
  .panel {
    padding: 20px 18px;
  }
  .topbar {
    padding: 0 28px;
  }
  .control-actions button {
    padding: 0 10px;
  }
  .controls {
    padding: 0 28px;
  }
}