/* Tree Growing (archive, 2014).
   A botanical plate on forest green cloth: cream paper, ink green linework,
   Charter throughout. Everything is scoped to .arc-tree. */

html:has(.arc-tree),
body:has(.arc-tree) {
  margin: 0;
  background: #13251b;
  color: #ebe3cf;
  color-scheme: dark;
}

.arc-tree {
  --forest: #13251b;
  --forest-2: #1a3024;
  --line: #2f4a3a;
  --cream: #ebe3cf;
  --sage: #a8b79c;
  --paper: #f5efe0;
  --paper-edge: #d9cfb6;
  --ink: #1d3a29;
  --ink-soft: #5d6f5f;
  --g: clamp(16px, 4vw, 56px);
  --serif: Charter, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, ui-serif, serif;
  font-family: var(--serif);
  background: var(--forest);
  color: var(--cream);
  overflow-x: clip;
}

.arc-tree *,
.arc-tree *::before,
.arc-tree *::after {
  box-sizing: border-box;
}

.arc-tree a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, currentColor 45%, transparent);
  text-underline-offset: 3px;
}

.arc-tree a:hover {
  text-decoration-color: currentColor;
}

.arc-tree :focus-visible {
  outline: 2px solid var(--cream);
  outline-offset: 3px;
}

/* Masthead */
.arc-tree-mast {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  margin: 0 var(--g);
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.arc-tree-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  text-decoration: none;
}

.arc-tree .arc-tree-home {
  text-decoration: none;
}

.arc-tree .arc-tree-home:hover {
  text-decoration: underline;
}

.arc-tree-archive {
  margin: 0;
  font-style: italic;
  color: var(--sage);
}

/* Hero: introduction, plate, epigraph */
.arc-tree-hero {
  display: grid;
  grid-template-columns: minmax(260px, 340px) minmax(0, 1fr);
  grid-template-areas:
    "intro plate"
    "epigraph plate";
  grid-template-rows: auto 1fr;
  column-gap: clamp(32px, 4vw, 64px);
  margin: 0 var(--g);
  padding: clamp(28px, 4vw, 48px) 0 clamp(48px, 6vw, 88px);
}

.arc-tree-intro {
  grid-area: intro;
  padding-top: 8px;
}

.arc-tree-eyebrow {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sage);
}

.arc-tree h1 {
  margin: 0;
  font-size: clamp(44px, 5vw, 68px);
  font-weight: normal;
  line-height: 1;
  letter-spacing: -0.015em;
}

.arc-tree-lede {
  margin: 22px 0 0;
  font-size: 18px;
  line-height: 1.55;
  color: var(--cream);
}

.arc-tree-epigraph {
  grid-area: epigraph;
  align-self: end;
  margin: 40px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.arc-tree-epigraph p {
  margin: 0;
  font-style: italic;
  font-size: 16px;
  line-height: 1.6;
  color: var(--cream);
}

.arc-tree-epigraph em {
  font-style: normal;
}

.arc-tree-epigraph footer {
  margin-top: 14px;
  font-size: 14px;
  color: var(--sage);
}

.arc-tree-epigraph footer a {
  display: inline-block;
  padding: 6px 0;
}

/* The plate */
.arc-tree-plate {
  grid-area: plate;
  margin: 0;
  min-width: 0;
}

/* The controller sizes the canvas to this element's clientWidth and
   clientHeight minus the controls, so it gets a height and no padding. */
.arc-tree-sim {
  display: flex;
  flex-direction: column;
  height: clamp(540px, calc(100svh - 196px), 940px);
  background: var(--paper);
  border: 1px solid var(--paper-edge);
  outline: 1px solid color-mix(in srgb, var(--paper) 35%, transparent);
  outline-offset: 6px;
  box-shadow: 0 30px 60px -30px rgb(0 0 0 / 0.55);
  color: var(--ink);
}

.arc-tree-canvas {
  --tree-stroke: #1d3a29;
  display: block;
  flex: 1 1 auto;
  min-height: 0;
  max-width: 100%;
  background: var(--paper);
  cursor: default;
}

.arc-tree-canvas:fullscreen {
  background: var(--paper);
  cursor: zoom-out;
}

.arc-tree-controls {
  flex: none;
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0 22px;
  padding: 14px 0 16px;
  border-top: 1px solid var(--paper-edge);
}

.arc-tree-sliders {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.arc-tree-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  font-size: 14px;
  font-style: italic;
  color: var(--ink);
  font-variant-numeric: tabular-nums lining-nums;
}

.arc-tree-field input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 32px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}

.arc-tree-field input[type="range"]::-webkit-slider-runnable-track {
  height: 1px;
  background: var(--ink);
}

.arc-tree-field input[type="range"]::-moz-range-track {
  height: 1px;
  background: var(--ink);
}

.arc-tree-field input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -7.5px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink);
}

.arc-tree-field input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink);
}

.arc-tree-field input[type="range"]:hover::-webkit-slider-thumb {
  background: var(--ink);
}

.arc-tree-field input[type="range"]:hover::-moz-range-thumb {
  background: var(--ink);
}

.arc-tree-field input[type="range"]:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.arc-tree-buttons {
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.arc-tree button {
  font: inherit;
  cursor: pointer;
}

.arc-tree-play {
  min-width: 96px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 16px;
  letter-spacing: 0.02em;
}

.arc-tree-play:hover {
  background: #2a4f39;
}

.arc-tree-full {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--paper-edge);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
}

.arc-tree-full:hover {
  border-color: var(--ink);
}

.arc-tree .arc-tree-play:focus-visible,
.arc-tree .arc-tree-full:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* The controller toggles this class on the fullscreen button. */
.arc-tree .invisible {
  visibility: hidden;
}

.arc-tree-plate figcaption {
  max-width: 62ch;
  margin-top: 22px;
  font-size: 15px;
  font-style: italic;
  line-height: 1.55;
  color: var(--sage);
}

.arc-tree-plate figcaption span {
  font-style: normal;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--cream);
  margin-right: 6px;
}

/* Article */
.arc-tree-article {
  max-width: 40rem;
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) var(--g) 24px;
  border-top: 1px solid var(--line);
  font-size: 19px;
  line-height: 1.65;
}

.arc-tree .arc-tree-article {
  box-sizing: content-box;
}

.arc-tree-opening {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.55;
}

.arc-tree-article section {
  margin-top: 52px;
}

.arc-tree-article h2 {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0 0 18px;
  font-size: 14px;
  font-weight: normal;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sage);
}

.arc-tree-article h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.arc-tree-article p {
  margin: 0 0 1.1em;
}

.arc-tree-article strong {
  font-weight: bold;
  color: #f6f0e1;
}

.arc-tree-article cite {
  font-style: italic;
}

.arc-tree-params {
  list-style: none;
  margin: 28px 0 8px;
  padding: 0;
}

.arc-tree-params li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.arc-tree-params li:last-child {
  border-bottom: 1px solid var(--line);
}

.arc-tree-params span {
  font-size: 22px;
  font-style: italic;
  line-height: 1.4;
  color: var(--sage);
}

/* Footer */
.arc-tree-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 48px var(--g) 0;
  padding: 18px 0 32px;
  border-top: 1px solid var(--line);
  font-size: 15px;
}

.arc-tree-foot p {
  margin: 0;
  font-style: italic;
  color: var(--sage);
}

.arc-tree-foot p a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

/* Tablets and narrow laptops: stack the introduction above the plate. */
@media (max-width: 899px) {
  .arc-tree-hero {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "intro"
      "plate"
      "epigraph";
    grid-template-rows: auto;
  }

  .arc-tree-intro {
    padding: 0 0 28px;
  }

  .arc-tree-lede {
    max-width: 36em;
  }

  .arc-tree-sim {
    height: clamp(560px, calc(100svh - 40px), 860px);
  }
}

/* Phones */
@media (max-width: 599px) {
  .arc-tree-mast {
    min-height: 52px;
    font-size: 14px;
  }

  .arc-tree-hero {
    padding-top: 24px;
  }

  .arc-tree-eyebrow {
    margin-bottom: 12px;
    font-size: 12px;
  }

  .arc-tree-lede {
    margin-top: 14px;
    font-size: 17px;
  }

  .arc-tree-sim {
    height: clamp(560px, calc(100svh - 160px), 640px);
    outline-offset: 4px;
  }

  .arc-tree-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin: 0 16px;
    padding: 10px 0 14px;
  }

  .arc-tree-sliders {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .arc-tree-field input[type="range"] {
    height: 40px;
  }

  .arc-tree-buttons {
    justify-content: space-between;
  }

  .arc-tree-play {
    flex: 1;
  }

  .arc-tree-article {
    font-size: 17px;
  }

  .arc-tree-opening {
    font-size: 19px;
  }

  .arc-tree-params li {
    grid-template-columns: 36px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .arc-tree * {
    transition: none !important;
  }
}