:root {
  color-scheme: light;
  --ink: #18211f;
  --muted: #5f6f69;
  --line: #dce5e1;
  --surface: #fbfcfb;
  --surface-2: #eef4f0;
  --accent: #168775;
  --accent-2: #315f9f;
  --accent-3: #b84a56;
  --bg: #f4f7f5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--accent-2);
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0 76px;
}

.site-header {
  padding: 24px 0 30px;
}

.eyebrow,
.project-type,
.project-note {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  font-size: clamp(42px, 7vw, 76px);
}

.lede {
  max-width: 790px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 20px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.actions a,
.project-item a,
.featured-article a,
.writing-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  padding: 8px 12px;
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
}

.actions a:first-child,
.project-item a,
.featured-article a,
.writing-list a {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.section {
  border-top: 1px solid var(--line);
  padding: 30px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: 22px;
  align-items: baseline;
  margin-bottom: 16px;
}

.section h2 {
  font-size: 24px;
}

.section p {
  max-width: 780px;
  margin: 0;
  color: var(--muted);
}

.project-list,
.writing-list {
  display: grid;
  gap: 16px;
}

.project-item {
  display: grid;
  grid-template-columns: minmax(260px, 42%) minmax(0, 1fr);
  gap: 20px;
  align-items: stretch;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.project-item:first-child,
.writing-list article:first-child {
  border-top: 0;
  padding-top: 0;
}

.project-item img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
}

.project-item > div,
.featured-article,
.writing-list article {
  display: grid;
  align-content: start;
  gap: 10px;
  min-width: 0;
}

.project-item h3,
.featured-article h3,
.writing-list h3 {
  font-size: 23px;
}

.project-item a,
.featured-article a,
.writing-list a {
  justify-self: start;
  margin-top: 4px;
}

.project-note {
  display: inline-flex;
  justify-self: start;
  min-height: 30px;
  align-items: center;
  border: 1px solid #d8c291;
  border-radius: 6px;
  background: #fff7e0;
  padding: 4px 9px;
  color: #856320;
  letter-spacing: 0;
}

.writing-list article {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.featured-article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  padding: 18px;
}

@media (max-width: 760px) {
  .page {
    width: min(100% - 24px, 1120px);
    padding-top: 28px;
  }

  .section-heading,
  .project-item {
    grid-template-columns: 1fr;
  }

  .project-item img {
    min-height: 190px;
  }
}

.article-page {
  max-width: 1120px;
}

.article-header h1 {
  font-size: clamp(30px, 4.5vw, 50px);
}

.article-title-subtitle {
  display: block;
  margin-top: 8px;
  font-size: 0.56em;
  line-height: 1.2;
}

.article-shell {
  border-top: 1px solid var(--line);
  padding-top: 30px;
}

.article-content {
  --article-text-max: 760px;
  display: flow-root;
}

.article-content > .article-wide {
  max-width: var(--article-text-max);
}

.article-content h2 {
  margin: 34px 0 0;
  font-size: 28px;
}

.article-content p,
.article-content li {
  color: var(--ink);
  font-size: 18px;
  line-height: 1.68;
}

.article-content p {
  margin: 16px 0 0;
  overflow-wrap: break-word;
}

.article-content > :not(.floating-demo):not(.margin-note) {
  max-width: var(--article-text-max);
  transition: max-width 120ms ease-out;
}

.article-content a {
  text-underline-offset: 3px;
}

.article-byline {
  margin: 12px 0 0;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.article-source {
  max-width: 620px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.article-source a {
  color: inherit;
}

.math-display {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  margin: 16px 0 0;
  padding: 6px 16px;
  color: var(--ink);
}

.article-content figure {
  margin: 20px 0 0;
}

.article-content img {
  display: block;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: 50%;
  gap: 14px;
  margin-top: 18px;
}

.figure-grid figure {
  margin: 0;
}

.floating-demo {
  float: right;
  width: min(76vw, var(--demo-width, 560px));
  height: 0;
  position: sticky;
  top: 50vh;
  transform: translateY(calc(-50% + var(--demo-drag-y, 0px) + var(--demo-safe-y, 0px)));
  margin: 0 0 0 28px;
  overflow: visible;
  z-index: 2;
}

.floating-demo .interactive-card {
  margin: 0;
  cursor: grab;
}

.floating-demo.is-dragging .interactive-card {
  cursor: grabbing;
}

.floating-demo .interactive-card canvas {
  height: var(--demo-canvas-height, min(34vw, 360px));
  min-height: 240px;
}

.floating-demo figcaption span,
.floating-demo figcaption strong {
  display: block;
}

.floating-demo figcaption span + span {
  margin-top: 6px;
}

.floating-demo figcaption .timer-readout {
  margin-top: 0;
}

.image-credit {
  font-size: 0.72rem;
  color: var(--muted);
}

.margin-note {
  float: right;
  clear: right;
  width: 220px;
  max-width: 220px;
  border-left: 3px solid var(--accent);
  background: rgba(22, 135, 117, 0.07);
  margin: 72px 104px 12px 12px;
  padding: 8px 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.interactive-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(24, 33, 31, 0.08);
  position: relative;
  overflow: hidden;
}

.interactive-toolbar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  padding: 10px 12px;
  color: var(--muted);
  font-size: 14px;
}

.turtle-compact-toolbar {
  align-items: center;
  flex-flow: row wrap;
  gap: 8px 10px;
}

.turtle-compact-toolbar label,
.turtle-stripes-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.turtle-compact-toolbar input[type="number"] {
  width: 3.25rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 6px;
  color: var(--text);
}

.turtle-compact-toolbar .icon-button {
  min-width: 34px;
  padding-inline: 8px;
  font-size: 17px;
  line-height: 1;
}

.demo-drag-handle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  width: 32px;
  min-width: 32px;
  min-height: 32px;
  border: 1px dashed var(--line);
  border-radius: 999px;
  background: white;
  padding: 0;
  color: var(--muted);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.demo-drag-handle svg {
  width: 17px;
  height: 17px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.toolbar-toggle-row {
  align-items: flex-start;
}

.toolbar-primary-toggles {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
}

.toolbar-primary-toggles .toolbar-toggle {
  font-size: 12px;
  line-height: 1.15;
}

.toolbar-toggle-right {
  margin-left: auto;
}

.toolbar-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.toolbar-toggle input {
  accent-color: var(--accent);
}

.marking-rank-control label {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.marking-rank-control[hidden] {
  display: none;
}

.mark-extension-control input {
  width: 4.8ch;
  border: 1px solid rgba(24, 33, 31, 0.18);
  border-radius: 7px;
  padding: 3px 2px 3px 5px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
}

.mark-extension-control[hidden] {
  display: none;
}

.demo-drag-handle:active,
.floating-demo.is-dragging .demo-drag-handle {
  cursor: grabbing;
}

.demo-resize-handle {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 42px;
  height: 42px;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  cursor: nesw-resize;
  touch-action: none;
  z-index: 3;
}

.demo-resize-handle::before {
  content: "";
  position: absolute;
  left: 5px;
  bottom: 5px;
  width: 20px;
  height: 20px;
  background:
    radial-gradient(circle at 5px 15px, rgba(45, 45, 45, 0.54) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 10px 15px, rgba(45, 45, 45, 0.48) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 15px 15px, rgba(45, 45, 45, 0.40) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 5px 10px, rgba(45, 45, 45, 0.48) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 10px 10px, rgba(45, 45, 45, 0.40) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 5px 5px, rgba(45, 45, 45, 0.34) 0 1.7px, transparent 1.8px);
}

.demo-resize-handle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.floating-demo.is-resizing .demo-resize-handle {
  background: rgba(232, 250, 246, 0.95);
}

.floating-demo.is-resizing .demo-resize-handle::before {
  background:
    radial-gradient(circle at 5px 15px, rgba(22, 135, 117, 0.82) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 10px 15px, rgba(22, 135, 117, 0.70) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 15px 15px, rgba(22, 135, 117, 0.58) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 5px 10px, rgba(22, 135, 117, 0.70) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 10px 10px, rgba(22, 135, 117, 0.58) 0 1.7px, transparent 1.8px),
    radial-gradient(circle at 5px 5px, rgba(22, 135, 117, 0.46) 0 1.7px, transparent 1.8px);
}

.interactive-toolbar button {
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  padding: 7px 10px;
  color: white;
  font-weight: 750;
  cursor: pointer;
}

.interactive-toolbar button[aria-pressed="true"] {
  border-color: var(--accent-3);
  background: var(--accent-3);
}

.interactive-card canvas {
  display: block;
  width: 100%;
  height: min(56vw, 520px);
  min-height: 320px;
  cursor: default;
  touch-action: none;
}

.interactive-card figcaption {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-top: 1px solid var(--line);
  min-height: 42px;
  padding: 10px 12px 12px 56px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
}

.interactive-card figcaption #turtle-status-readout {
  flex: 1;
  min-width: 0;
}

.interactive-card figcaption .timer-readout {
  margin-left: auto;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 900px) {
  .floating-demo {
    float: none;
    width: 100%;
    height: auto;
    position: static;
    transform: none;
    --demo-drag-y: 0px;
    --demo-safe-y: 0px;
    --demo-width: 560px;
    --demo-canvas-height: 360px;
    margin: 18px 0 0;
  }

  .margin-note {
    float: none;
    clear: both;
    width: auto;
    max-width: var(--article-text-max);
    margin: 16px 0 12px;
  }
}

@media (max-width: 620px) {
  .figure-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-content p,
  .article-content li {
    font-size: 16px;
  }
}