/* Convex hull tool — theme tokens + layout (tools/convex-hull.html) */

body.page-convex-hull {
  --bg: #0a0a0a;
  --panel: #141414;
  --text: #fafafa;
  --muted: #a3a3a3;
  --accent: #58a6ff;
  --hull: #3fb950;
  --point: #f0883e;
  --cv-border: #30363d;
  --cv-btn-bg: #21262d;
  --cv-btn-hover: #30363d;
  --cv-seg-active-bg: rgba(56, 139, 253, 0.2);
  --cv-input-bg: #0d1117;
  --cv-primary: #238636;
  --cv-primary-hover: #2ea043;
  --cv-err: #f85149;
  --cv-three-bg: #0d1117;
  --cv-grid-maj: #5c6b8a;
  --cv-grid-min: #2a3548;
  --cv-2d-plot-bg: #0d1117;
  --cv-2d-grid: #21262d;
  --cv-2d-hull-fill: rgba(63, 185, 80, 0.18);
  --cv-2d-hull-line: #3fb950;
  --cv-2d-pt-boundary: #f0f3f6;
  --cv-2d-pt-interior: #ff2222;
  --cv-2d-pt-ring: #0d1117;
  --cv-2d-muted-text: #8b9cb3;
  --cv-edge-line: #f0f3f6;
  --cv-hull-three: #3fb950;
  --cv-edge-three: #58a6ff;
  /* Plot / WebGL viewports — always dark regardless of page theme */
  --cv-view-surface-bg: #0d1117;
  --cv-view-border: #30363d;
  --cv-view-toolbar-bg: rgba(22, 27, 34, 0.92);
  --cv-view-toolbar-hover: #30363d;
  --cv-view-icon: #e6edf3;
  --cv-view-icon-hover: #58a6ff;
}

html[data-theme="light"] body.page-convex-hull {
  --bg: #ffffff;
  --panel: #fafafa;
  --text: #1a1a1a;
  --muted: #737373;
  --accent: #0969da;
  --hull: #1a7f37;
  --point: #bc4c00;
  --cv-border: #e5e5e5;
  --cv-btn-bg: #f5f5f5;
  --cv-btn-hover: #ebebeb;
  --cv-seg-active-bg: rgba(9, 105, 218, 0.12);
  --cv-input-bg: #ffffff;
  --cv-primary: #1a7f37;
  --cv-primary-hover: #116329;
  --cv-err: #cf222e;
  /* --cv-three-bg, --cv-2d-*, hull/edge colors: omitted → stay dark (base block) */
}

@media (prefers-color-scheme: light) {
  html:not([data-theme]) body.page-convex-hull {
    --bg: #ffffff;
    --panel: #fafafa;
    --text: #1a1a1a;
    --muted: #737373;
    --accent: #0969da;
    --hull: #1a7f37;
    --point: #bc4c00;
    --cv-border: #e5e5e5;
    --cv-btn-bg: #f5f5f5;
    --cv-btn-hover: #ebebeb;
    --cv-seg-active-bg: rgba(9, 105, 218, 0.12);
    --cv-input-bg: #ffffff;
    --cv-primary: #1a7f37;
    --cv-primary-hover: #116329;
    --cv-err: #cf222e;
  }
}

body.page-convex-hull {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

body.page-convex-hull * {
  box-sizing: border-box;
}

.page-convex-hull .wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: calc(var(--nav-height) + 1rem) 1rem 2rem;
}

.page-convex-hull h1 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0;
}

.page-convex-hull .title-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.page-convex-hull .title-row h1 {
  flex: 1;
  min-width: 0;
}

.page-convex-hull .btnInfo {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--cv-btn-bg);
  border: 1px solid var(--cv-border);
  color: var(--muted);
  cursor: pointer;
}

.page-convex-hull .btnInfo:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--cv-btn-hover);
}

.page-convex-hull .btnInfo svg {
  width: 18px;
}

.page-convex-hull .note {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 1rem;
}

.page-convex-hull .note a {
  color: var(--accent);
}

.page-convex-hull .mode-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.page-convex-hull .mode-bar span {
  font-size: 0.85rem;
  color: var(--muted);
}

.page-convex-hull .seg {
  display: inline-flex;
  border-radius: 8px;
  border: 1px solid var(--cv-border);
  overflow: hidden;
}

.page-convex-hull .seg button {
  margin: 0;
  border: none;
  border-radius: 0;
  background: var(--cv-btn-bg);
}

.page-convex-hull .seg button + button {
  border-left: 1px solid var(--cv-border);
}

.page-convex-hull .seg button.active {
  background: var(--cv-seg-active-bg);
  color: var(--accent);
  border-color: transparent;
}

.page-convex-hull .layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
}

@media (max-width: 800px) {
  .page-convex-hull .layout {
    grid-template-columns: 1fr;
  }
}

.page-convex-hull .panel {
  background: var(--panel);
  border-radius: 10px;
  padding: 1rem;
  border: 1px solid var(--cv-border);
}

.page-convex-hull label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.page-convex-hull textarea#vars {
  min-height: 100px;
}

.page-convex-hull textarea {
  width: 100%;
  min-height: 180px;
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.85rem;
  padding: 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--cv-border);
  background: var(--cv-input-bg);
  color: var(--text);
  resize: vertical;
}

.page-convex-hull textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.page-convex-hull .row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.page-convex-hull button {
  font: inherit;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--cv-border);
  background: var(--cv-btn-bg);
  color: var(--text);
  cursor: pointer;
}

.page-convex-hull button:hover {
  background: var(--cv-btn-hover);
  border-color: var(--accent);
}

.page-convex-hull button.primary {
  background: var(--cv-primary);
  border-color: var(--cv-primary);
  color: #fff;
}

.page-convex-hull button.primary:hover {
  background: var(--cv-primary-hover);
  border-color: var(--cv-primary-hover);
}

body.page-convex-hull.mode-2d #tikzPanel {
  display: none;
}

.page-convex-hull .threeViewHost {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--cv-view-border);
  background: var(--cv-view-surface-bg);
}

body.page-convex-hull.mode-2d .threeViewHost {
  display: none;
}

body.page-convex-hull.mode-3d .threeViewHost {
  display: block;
}

.page-convex-hull .threeViewToolbar {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 3;
  display: flex;
  flex-direction: row;
  gap: 4px;
}

.page-convex-hull .threeViewToolbar .iconBtn {
  width: 30px;
  height: 30px;
  padding: 0;
  margin: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: var(--cv-view-toolbar-bg);
  border: 1px solid var(--cv-view-border);
  color: var(--cv-view-icon);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

.page-convex-hull .threeViewToolbar .iconBtn:hover {
  background: var(--cv-view-toolbar-hover);
  border-color: var(--cv-view-icon-hover);
  color: var(--cv-view-icon-hover);
}

.page-convex-hull .threeViewToolbar .iconBtn svg {
  width: 16px;
  flex-shrink: 0;
}

.page-convex-hull #tikzPanel {
  margin-top: 0.75rem;
}

.page-convex-hull #tikzPanel label {
  margin-bottom: 0.35rem;
}

.page-convex-hull #tikzOut {
  min-height: 140px;
  font-size: 0.78rem;
}

.page-convex-hull #canvasWrap {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--cv-view-border);
  background: var(--cv-view-surface-bg);
}

.page-convex-hull #threeWrap {
  position: relative;
  min-height: 420px;
  aspect-ratio: 1;
}

.page-convex-hull #threeWrap canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

body.page-convex-hull.mode-3d #canvasWrap {
  display: none;
}

.page-convex-hull canvas#plot {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.page-convex-hull #status {
  margin-top: 0.65rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.page-convex-hull #status.err {
  color: var(--cv-err);
}

.page-convex-hull #threeHint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.5rem;
}