:root {
  color-scheme: dark;
  --bg-top: #2f1406;
  --bg-bottom: #140803;
  --panel: rgba(34, 14, 6, 0.8);
  --panel-border: rgba(255, 180, 102, 0.22);
  --text: #fff3e8;
  --muted: #d7b295;
  --accent: #ff9f3d;
  --danger: #ff6b6b;
  --success: #ffcf7a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(255, 145, 66, 0.34), transparent 30%),
    radial-gradient(circle at 20% 20%, rgba(255, 196, 120, 0.12), transparent 24%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  padding: 24px;
}

.game-panel,
.controls-panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
}

.game-panel {
  position: relative;
  overflow: hidden;
}

body.game-maximized {
  overflow: hidden;
}

body.game-maximized .app-shell {
  grid-template-columns: 1fr;
}

body.game-maximized .controls-panel {
  display: none;
}

body.game-maximized .game-panel {
  position: fixed;
  inset: 12px;
  z-index: 50;
  border-radius: 28px;
  box-shadow: 0 32px 100px rgba(0, 0, 0, 0.45);
}

.hud {
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 3;
  display: flex;
  gap: 12px;
}

.hud-block {
  min-width: 110px;
  padding: 10px 14px;
  border-radius: 16px;
  background: rgba(5, 10, 20, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hud-label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 4px;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  max-height: 720px;
  background:
    radial-gradient(circle at center, rgba(255, 174, 66, 0.14), transparent 22%),
    linear-gradient(180deg, rgba(56, 22, 8, 0.78), rgba(20, 8, 4, 0.96));
}

.hud {
  grid-area: hud;
}

#gameCanvas {
  grid-area: canvas;
}

.game-footer {
  grid-area: footer;
}

.camera-panel {
  grid-area: camera;
}

.game-footer {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  z-index: 3;
  display: flex;
  align-items: stretch;
  gap: 10px;
}

.status-banner {
  flex: 1;
  min-height: 44px;
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(28, 12, 5, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--muted);
}

.frame-toggle {
  flex: 0 0 44px;
  min-height: 44px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background: rgba(28, 12, 5, 0.8);
  color: var(--text);
  cursor: pointer;
}

.frame-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.frame-toggle .icon-collapse {
  display: none;
}

body.game-maximized .frame-toggle .icon-expand {
  display: none;
}

body.game-maximized .frame-toggle .icon-collapse {
  display: block;
}

body.game-maximized #gameCanvas {
  max-height: calc(100vh - 24px);
}

.camera-panel {
  position: absolute;
  right: 18px;
  top: 18px;
  z-index: 3;
  width: 150px;
  border-radius: 14px;
  overflow: hidden;
  background: rgba(28, 12, 5, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

#cameraFeed,
#poseCanvas {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
}

#cameraFeed {
  display: none;
}

#poseCanvas {
  background:
    radial-gradient(circle at center, rgba(255, 166, 77, 0.12), transparent 40%),
    rgba(20, 8, 4, 0.96);
}

.controls-panel {
  padding: 28px;
  align-self: start;
}

.controls-panel h1 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 40px;
  line-height: 1;
}

.controls-panel p {
  margin: 0 0 20px;
  color: var(--muted);
}

.upload-field {
  display: block;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--muted);
}

#imageUpload {
  display: block;
  width: 100%;
  margin-bottom: 10px;
  color: var(--text);
}

.upload-note {
  margin: 0 0 18px;
  font-size: 12px;
  color: var(--muted);
}

#startButton {
  width: 100%;
  padding: 14px 16px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff9a3d, var(--accent));
  color: #1f1300;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

#startButton:disabled {
  cursor: progress;
  opacity: 0.7;
}

.tips {
  margin: 20px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.5;
}

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .controls-panel {
    order: -1;
  }
}

@media (max-width: 780px) {
  .app-shell {
    padding: 12px;
    gap: 12px;
  }
}

@media (max-width: 780px) and (orientation: portrait) {
  .game-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 120px;
    grid-template-rows: auto minmax(0, 1fr) auto;
    grid-template-areas:
      "hud camera"
      "canvas canvas"
      "footer footer";
    gap: 12px;
    padding: 12px;
    min-height: 72dvh;
  }

  body.game-maximized .game-panel {
    inset: 0;
    border-radius: 0;
    min-height: 100dvh;
  }

  .hud,
  .camera-panel,
  .game-footer {
    position: static;
    inset: auto;
  }

  .hud {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    max-width: none;
  }

  .hud-block {
    min-width: 0;
  }

  .camera-panel {
    width: 120px;
    align-self: start;
  }

  #gameCanvas {
    height: 100%;
    min-height: 48dvh;
    max-height: none;
    aspect-ratio: auto;
  }

  .game-footer {
    left: auto;
    right: auto;
    bottom: auto;
  }
}