/* site/studio.css */
/* Direction A: ONE FRAME, no scroll. Inspired by polyfork.dev/try + DESIGN.md tokens */

:root {
  --duck-yellow: #ffd43b;
  --duck-ink: #211f17;
  --duck-brown: #5c5133;
  --beak-orange: #f28c28;
  --beak-deep: #9c3a12;
  --water-blue: #4ba3c7;
  --water-deep: #064f67;
  --duck-cream: #fff7d6;
  --focus-blue: #004e89;

  --studio-bg-top: #e8ecf1;
  --studio-bg-floor: #d4dbe3;
  --card-bg: rgba(255, 247, 214, 0.94);
  --card-border: #211f17;
  --shadow-contact: rgba(33, 31, 23, 0.18);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body.studio-app {
  width: 100%;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--studio-bg-floor);
  color: var(--duck-ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  -webkit-font-smoothing: antialiased;
}

/* 顶部栏：紧凑优雅，单行展示 */
.studio-header {
  flex: none;
  background: var(--duck-yellow);
  border-bottom: 2px solid var(--duck-ink);
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 10;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.wordmark {
  font-size: 1.15rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--duck-ink);
  letter-spacing: -0.02em;
}

.wordmark:hover {
  text-decoration: underline;
  text-decoration-color: var(--beak-deep);
}

.header-divider {
  color: var(--duck-brown);
  opacity: 0.5;
}

.header-title {
  font-weight: 700;
  font-size: 0.95rem;
}

.header-sub {
  font-size: 0.8rem;
  color: var(--duck-brown);
  margin-left: 6px;
}

/* 3D 舞台区域 (Stage Container) */
.stage-container {
  flex: 1;
  min-height: 0;
  position: relative;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 38%, var(--studio-bg-top) 0%, var(--studio-bg-floor) 100%);
}

#viewport-canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

/* 悬浮旋钮控制坞 (Knob Dock) */
.knob-dock {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 292px;
  max-height: calc(100% - 80px);
  background: var(--card-bg);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 8px 24px var(--shadow-contact);
  backdrop-filter: blur(8px);
  overflow-y: auto;
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.block-editor-pane[hidden] {
  display: none !important;
}

/* SDF 低模积木编辑器面板 */
.block-editor-pane {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.76rem;
}

.editor-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(33, 31, 23, 0.16);
}

.editor-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.editor-sec-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  color: var(--duck-ink);
}

.mesh-stat-badge {
  font-size: 0.66rem;
  font-weight: 700;
  background: rgba(33, 31, 23, 0.09);
  color: var(--duck-ink);
  padding: 2px 6px;
  border-radius: 999px;
  white-space: nowrap;
}

.add-prim-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.add-prim-btn {
  border: 1px solid rgba(33, 31, 23, 0.25);
  background: #fff;
  color: var(--duck-ink);
  font: inherit;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 4px 2px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.12s ease;
}

.add-prim-btn:hover {
  background: var(--duck-yellow);
  border-color: var(--duck-ink);
}

.block-tree-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 128px;
  overflow-y: auto;
  padding-right: 2px;
}

.block-tree-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px;
  border-radius: 6px;
  border: 1px solid rgba(33, 31, 23, 0.14);
  background: rgba(255, 255, 255, 0.65);
  cursor: pointer;
  font: inherit;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--duck-ink);
  text-align: left;
}

.block-tree-item:hover {
  background: #fff;
}

.block-tree-item.active {
  background: var(--duck-yellow);
  border-color: var(--duck-ink);
  font-weight: 700;
}

.block-tag {
  font-size: 0.65rem;
  opacity: 0.75;
  background: rgba(33, 31, 23, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
}

.inspector-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mini-slider-row {
  display: grid;
  grid-template-columns: 42px 1fr 38px;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
}

.mini-val {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--duck-brown);
}

.block-del-btn {
  border: 1px solid rgba(156, 58, 18, 0.35);
  background: rgba(242, 140, 40, 0.12);
  color: var(--beak-deep);
  font: inherit;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  cursor: pointer;
}

.block-del-btn:hover {
  background: var(--beak-deep);
  color: #fff;
}

.dock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(33, 31, 23, 0.18);
  padding-bottom: 8px;
}

.dock-title {
  font-size: 0.95rem;
  font-weight: 700;
}

.dock-reset-btn {
  background: none;
  border: none;
  font: inherit;
  font-size: 0.75rem;
  color: var(--duck-brown);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
}

.dock-reset-btn:hover {
  color: var(--duck-ink);
  background: rgba(0,0,0,0.06);
}

/* 滑杆旋钮 */
.knob-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: #d8dee6;
  outline: none;
}

.knob-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--duck-ink);
  border: 2px solid #fff;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  transition: transform 0.1s ease;
}

.knob-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: var(--beak-deep);
}

/* 色块选项 (Palette chips) */
.knob-palette-row {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}

.palette-chip {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.25);
  cursor: pointer;
  outline: 2px solid transparent;
  transition: transform 0.15s ease, outline 0.15s ease;
}

.palette-chip:hover {
  transform: scale(1.12);
}

.palette-chip.active {
  outline-color: var(--duck-ink);
  transform: scale(1.15);
}

/* 开关与单选 (Toggle / Choice) */
.choice-group {
  display: flex;
  gap: 4px;
  background: #e4e9ef;
  padding: 2px;
  border-radius: 6px;
}

.choice-btn {
  flex: 1;
  padding: 4px 4px;
  border: none;
  background: none;
  font: inherit;
  font-size: 0.70rem;
  font-weight: 600;
  color: var(--duck-brown);
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.choice-btn.active {
  background: #fff;
  color: var(--duck-ink);
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

/* 操作按钮栏 (右下角/左下角) */
.stage-actions {
  position: absolute;
  right: 16px;
  bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 5;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1.5px solid var(--duck-ink);
  border-radius: 999px;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--duck-ink);
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  backdrop-filter: blur(6px);
  transition: all 0.15s ease;
}

.action-btn:hover {
  background: var(--duck-cream);
  transform: translateY(-1px);
}

/* 首次操作小提示 */
.stage-hint {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  background: rgba(33, 31, 23, 0.78);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.5s ease;
  z-index: 4;
}

/* Hidden visually after the intro, kept as the canvas's accessible description. */
.stage-hint.is-hidden {
  clip-path: inset(50%);
  width: 1px;
  height: 1px;
  overflow: hidden;
  white-space: nowrap;
}

.stage-hint.fade-out {
  opacity: 0;
}

/* 原生 WGSL 源码查看弹窗 */
.source-dialog {
  border: none;
  background: transparent;
  padding: 0;
  margin: auto;
  max-width: 90vw;
  max-height: 85vh;
  z-index: 100;
}

.source-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
}

.dialog-box {
  background: #1e1e24;
  color: #f1f2f6;
  border: 2px solid var(--duck-ink);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 800px;
  max-height: 80vh;
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dialog-header h3 {
  font-size: 1rem;
  color: var(--duck-yellow);
}

.dialog-close {
  background: none;
  border: none;
  color: #a4b0be;
  font-size: 1.2rem;
  cursor: pointer;
}

.dialog-close:hover {
  color: #fff;
}

.dialog-desc {
  font-size: 0.8rem;
  color: #a4b0be;
}

.dialog-code {
  flex: 1;
  overflow: auto;
  background: #131417;
  padding: 12px;
  border-radius: 8px;
  font-size: 0.76rem;
  line-height: 1.45;
  color: #7bed9f;
}

/* Keyboard focus (DESIGN.md: Focus Blue, 3px). The canvas draws its ring inside its edge. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus-blue);
  outline-offset: 2px;
}

#viewport-canvas:focus-visible {
  outline-offset: -3px;
}

/* 响应式适配 */
@media (max-width: 720px) {
  .header-sub {
    display: none;
  }
  .studio-header {
    padding: 8px 12px;
  }
  .brand-row {
    flex-shrink: 1;
    min-width: 0;
    flex-wrap: wrap;
    gap: 6px;
  }
  .brand-row .wordmark {
    font-size: 1rem;
  }
  .header-title {
    font-size: 0.85rem;
  }
  .status-badge {
    margin-left: 0;
    white-space: nowrap;
  }
  .action-btn {
    flex: 1 1 0;
    justify-content: center;
    min-height: 44px;
    padding: 8px 10px;
    white-space: nowrap;
  }
  .knob-dock {
    width: calc(100% - 32px);
    max-height: 200px;
    top: auto;
    bottom: 60px;
  }
  .stage-actions {
    left: 16px;
    right: 16px;
    bottom: 12px;
    justify-content: space-between;
  }
  .action-btn span {
    font-size: 0.75rem;
  }
}

@media (max-width: 420px) {
  .action-btn svg {
    display: none;
  }
}

/* WebGPU / WebGL2 状态徽章与 FPS 计数 */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(33, 31, 23, 0.08);
  border: 1px solid rgba(33, 31, 23, 0.22);
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--duck-ink);
  margin-left: 10px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #2ed573;
  display: inline-block;
  box-shadow: 0 0 6px rgba(46, 213, 115, 0.6);
}

.badge-dot.webgl2 {
  background: #ffa502;
  box-shadow: 0 0 6px rgba(255, 165, 2, 0.6);
}

.badge-dot.error {
  background: #ff4757;
  box-shadow: 0 0 6px rgba(255, 71, 87, 0.6);
}