:root {
  color-scheme: dark;
  --bg: #15181d;
  --panel: #1d222b;
  --text: #ecf0f5;
  --muted: #a7b1bf;
  --accent: #5fb3ff;
  --viewport-height: 100dvh;
}

* {
  box-sizing: border-box;
}

html,
body {
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
  min-height: var(--viewport-height);
}

.status-light {
  position: fixed;
  top: 12px;
  right: 12px;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 1px solid rgba(215, 239, 255, 0.95);
  background: #8cd8ff;
  box-shadow:
    0 0 8px rgba(129, 210, 255, 0.85),
    0 0 20px rgba(102, 196, 255, 0.55);
  animation: status-light-flash 1s ease-in-out infinite;
  transform: scale(var(--beat-scale, 1));
  opacity: var(--beat-opacity, 1);
  pointer-events: none;
  z-index: 1000;
}

@keyframes status-light-flash {
  0%,
  100% {
    background: #97e2ff;
    box-shadow:
      0 0 10px rgba(145, 221, 255, 0.9),
      0 0 24px rgba(104, 200, 255, 0.6);
    filter: brightness(1.15) saturate(1.1);
  }

  35% {
    background: #d8f7ff;
    box-shadow:
      0 0 24px rgba(216, 247, 255, 0.95),
      0 0 42px rgba(146, 218, 255, 0.7);
    filter: brightness(1.45) saturate(1.2);
  }

  70% {
    background: #61c9ff;
    box-shadow:
      0 0 6px rgba(102, 201, 255, 0.8),
      0 0 14px rgba(87, 185, 245, 0.45);
    filter: brightness(0.88) saturate(0.95);
  }
}

.app {
  display: grid;
  grid-template-columns: 1fr 320px;
  height: var(--viewport-height);
  max-width: 100vw;
  overflow: hidden;
}

/* ── Mobile view toggle (hidden on desktop) ── */
.mobile-view-toggle {
  display: none;
}

.views-wrap {
  padding: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  min-height: 0;
  height: 100%;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: hidden;
}

.views-wrap.single-view {
  grid-template-columns: 1fr;
}

.view-panel {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.view-panel h2 {
  margin: 0 0 8px;
}

.canvas-container {
  width: 100%;
  max-width: 100%;
  height: auto;
  min-height: clamp(140px, 24vh, 260px);
  background: #0f1116;
  border: 1px solid #2a3342;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  flex: 1 1 0%;
  margin: 0 auto;
}

#sim-canvas {
  width: 100%;
  max-width: 100%;
  height: 100%;
  display: block;
}

.sim-3d {
  width: 100%;
  max-width: 100%;
  height: auto;
  background: #0f1116;
  border: 1px solid #2a3342;
  border-radius: 8px;
  min-height: clamp(140px, 24vh, 260px);
  overflow: hidden;
  flex: 1 1 0%;
  margin: 0 auto;
}

.sim-3d canvas {
  width: 100%;
  max-width: 100%;
  height: 100%;
  display: block;
}

.panel {
  background: var(--panel);
  border-left: 1px solid #2a3342;
  padding: 16px;
  min-width: 0;
  overflow-y: auto;
}

#tweakpane-root {
  margin-bottom: 12px;
}

.audio-debug {
  margin: 0 0 12px;
  padding: 8px;
  border: 1px solid #2a3342;
  border-radius: 8px;
  background: #121720;
}

.audio-debug h2 {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.audio-debug-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.78rem;
  color: #b8c6d9;
  font-variant-numeric: tabular-nums;
}

.beat-flash {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: #2a3342;
  box-shadow: 0 0 0 rgba(140, 216, 255, 0);
  transition: background 80ms ease, box-shadow 80ms ease, transform 80ms ease;
}

.beat-flash.active {
  background: #d8f7ff;
  box-shadow:
    0 0 8px rgba(190, 234, 255, 0.85),
    0 0 18px rgba(114, 199, 255, 0.6);
  transform: scale(1.25);
}

#audio-debug-canvas {
  width: 100%;
  height: 120px;
  display: block;
  border: 1px solid #2b3648;
  border-radius: 6px;
  background: #0a0d13;
}

#tweakpane-root .tp-dfwv {
  width: 100%;
}

h1 {
  margin: 0 0 14px;
  font-size: 1.1rem;
}

h2 {
  margin: 12px 0 8px;
  font-size: 0.95rem;
}

.settings-section {
  margin: 14px 0;
}

.settings-section > summary {
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  list-style: none;
  margin: 0;
}

.settings-section > summary::-webkit-details-marker {
  display: none;
}

.settings-section > summary::before {
  content: '>';
  display: inline-block;
  margin-right: 6px;
  transform: translateY(-1px);
}

.settings-section[open] > summary::before {
  content: 'v';
}

.row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-bottom: 12px;
}

.row output {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.buttons {
  grid-template-columns: 1fr 1fr;
}

.buttons.single {
  grid-template-columns: 1fr;
}

button {
  background: #2b3850;
  border: 1px solid #3d5274;
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
}

button:hover {
  background: #35486a;
}

input[type='range'] {
  width: 100%;
}

input[type='text'],
select {
  width: 100%;
  background: #10141b;
  color: var(--text);
  border: 1px solid #2f3a4d;
  border-radius: 6px;
  padding: 8px;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.diag pre {
  margin: 0;
  background: #10141b;
  border: 1px solid #2a3342;
  border-radius: 6px;
  padding: 10px;
  white-space: pre-wrap;
  color: #d4dbe7;
  line-height: 1.3;
  font-size: 12px;
}

.mujoco-import {
  padding: 10px;
  border: 1px solid #2a3342;
  border-radius: 8px;
  background: #141922;
}

.mujoco-import > summary {
  margin-bottom: 8px;
}

.mujoco-import:not([open]) {
  padding-bottom: 10px;
}

.mujoco-import p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.86rem;
}

.mujoco-import input[type='file'] {
  width: 100%;
  margin-bottom: 8px;
}

.mujoco-playback {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid #2a3342;
}

.mujoco-playback label {
  display: block;
  margin: 8px 0 4px;
  color: var(--muted);
  font-size: 0.84rem;
}

.mujoco-playback output {
  display: block;
  margin-top: 4px;
  color: #d4dbe7;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.mujoco-playback .check {
  margin: 0;
  justify-content: center;
}

:root[data-mobile-layout='1'] .app {
  grid-template-columns: 1fr;
  grid-template-rows: minmax(0, 1fr) auto;
}

:root[data-mobile-layout='1'] .panel {
  border-left: 0;
  border-top: 1px solid #2a3342;
  padding: 12px;
}

:root[data-mobile-layout='1'] .views-wrap {
  grid-template-columns: 1fr;
  min-height: 0;
  padding: 8px;
  gap: 8px;
}

:root[data-mobile-layout='1'] .mobile-view-toggle {
  display: flex;
  gap: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #3d5274;
  margin-bottom: 8px;
}

:root[data-mobile-layout='1'] .toggle-btn {
  flex: 1;
  padding: 10px 0;
  border: none;
  border-radius: 0;
  background: #1d222b;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  min-height: 0;
}

:root[data-mobile-layout='1'] .toggle-btn.active {
  background: var(--accent);
  color: #111;
}

:root[data-mobile-layout='1'] .views-wrap[data-mobile-view="3d"] #view-2d-panel {
  display: none;
}

:root[data-mobile-layout='1'] .views-wrap[data-mobile-view="2d"] #view-3d-panel {
  display: none;
}

:root[data-mobile-layout='1'] .view-panel h2 {
  display: none;
}

:root[data-mobile-layout='1'] .canvas-container,
:root[data-mobile-layout='1'] .sim-3d {
  min-height: clamp(130px, 30vh, 220px);
  border-radius: 6px;
}

@media (max-width: 1100px), (hover: none) and (pointer: coarse) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1fr) auto;
  }

  .panel {
    border-left: 0;
    border-top: 1px solid #2a3342;
  }

  .views-wrap {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .canvas-container,
  .sim-3d {
    aspect-ratio: auto;
    height: auto;
    min-height: clamp(140px, 28vh, 240px);
  }
}

@media (max-width: 768px), (hover: none) and (pointer: coarse) {
  .mobile-view-toggle {
    display: flex;
    gap: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #3d5274;
    margin-bottom: 8px;
  }

  .toggle-btn {
    flex: 1;
    padding: 10px 0;
    border: none;
    border-radius: 0;
    background: #1d222b;
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    min-height: 0;
  }

  .toggle-btn.active {
    background: var(--accent);
    color: #111;
  }

  /* Hide the inactive view panel on mobile */
  .views-wrap[data-mobile-view="3d"] #view-2d-panel {
    display: none;
  }

  .views-wrap[data-mobile-view="2d"] #view-3d-panel {
    display: none;
  }

  /* Hide h2 titles on mobile (toggle replaces them) */
  .view-panel h2 {
    display: none;
  }

  .views-wrap {
    padding: 8px;
    gap: 8px;
  }

  .canvas-container,
  .sim-3d {
    aspect-ratio: auto;
    min-height: clamp(130px, 30vh, 220px);
    border-radius: 6px;
  }

  .panel {
    padding: 12px;
  }

  h1 {
    font-size: 1rem;
    margin-bottom: 10px;
  }

  h2 {
    margin-top: 10px;
    font-size: 0.9rem;
  }

  .row {
    margin-bottom: 10px;
  }

  button,
  input[type='text'],
  select {
    min-height: 40px;
  }
}

@media (max-width: 480px) {
  .status-light {
    top: 8px;
    right: 8px;
    width: 14px;
    height: 14px;
    border-radius: 3px;
  }

  .views-wrap {
    padding: 6px;
    gap: 6px;
  }

  .canvas-container,
  .sim-3d {
    aspect-ratio: auto;
    min-height: clamp(120px, 28vh, 190px);
  }

  .panel {
    padding: 10px;
  }

  #audio-debug-canvas {
    height: 96px;
  }

  .buttons {
    grid-template-columns: 1fr;
  }

  .diag pre {
    font-size: 11px;
    padding: 8px;
  }
}