@import url("./theme.css");

/* Page design for the landing page and the demos. Nothing here styles the panel — that is
   css/gui.css, which pages link separately, so it stays obvious which rules belong to the
   toolkit and which belong to the site around it. */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 system-ui, -apple-system, sans-serif;
  padding: 0 1.25rem 4rem;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

main,
header,
footer {
  max-width: 1100px;
  margin: 0 auto;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: 4.5rem 0 2.5rem;
}

/* Full-bleed: the header is a 1100px column, so the glow is pulled out to the width of the
   viewport and centred on it. `overflow-x: clip` on the body keeps that from producing a
   horizontal scrollbar without making the page a scroll container. */
.hero::before {
  content: "";
  position: absolute;
  top: -30%;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  height: 520px;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60% 80% at 20% 0%, var(--hero-glow-a), var(--hero-glow-a-out) 60%),
    radial-gradient(50% 70% at 90% 10%, var(--hero-glow-b), var(--hero-glow-b-out) 60%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--dim);
  background: var(--eyebrow-bg);
  border: 1px solid var(--chrome-border);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
  text-decoration: none;
}

.eyebrow b {
  color: var(--accent-text);
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.hero h1 b {
  color: var(--accent);
}

.lede {
  margin: 1rem 0 0;
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--dim);
  max-width: 42rem;
}

.lede strong {
  color: var(--fg);
  font-weight: 600;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  padding: 0.7rem 1.15rem;
  border-radius: 9px;
  font-weight: 600;
  font-size: 14.5px;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn.primary:hover {
  background: var(--accent-hot);
}

.btn.ghost {
  background: var(--chrome-btn);
  border-color: var(--chrome-border);
  color: var(--fg);
}

.btn.ghost:hover {
  border-color: var(--chrome-hover);
}

/* ---------- code ---------- */

.codecard {
  margin-bottom: 1.6rem;
  background: var(--card-deep);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.codecard .bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--line-soft);
}

.codecard .bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #333;
  display: block;
}

.codecard .bar i:nth-child(1) { background: #ff5f56; }
.codecard .bar i:nth-child(2) { background: #ffbd2e; }
.codecard .bar i:nth-child(3) { background: #27c93f; }

.codecard .bar span {
  margin-left: 0.4rem;
  font-size: 12px;
  color: var(--dimmer);
}

pre.code {
  margin: 0;
  padding: 1.1rem 1.25rem 1.55rem;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fg);
}

/* Token colours, applied by the highlighter in demo/shell.js. */
pre.code .c { color: var(--code-comment); font-style: italic; }
pre.code .k { color: var(--code-keyword); }
pre.code .s { color: var(--code-string); }
pre.code .fn { color: var(--code-fn); }
pre.code .n { color: var(--code-number); }
pre.code .hl { color: var(--accent-hot); }

/* ---------- sections ---------- */

section {
  margin-top: 3.5rem;
  scroll-margin-top: 1rem;
}

.kicker {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--dimmer);
  margin: 0 0 0.35rem;
  font-weight: 700;
}

.h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(22px, 3.5vw, 30px);
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--fg);
  font-weight: 600;
}

.sub {
  margin: 0 0 1.6rem;
  color: var(--dim);
  max-width: 44rem;
}

/* two-column pitch: prose on one side, something running on the other */

.pitch {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 860px) {
  .pitch {
    grid-template-columns: 1fr 1.1fr;
  }
  .pitch.narrow {
    grid-template-columns: 1.15fr 340px;
  }
}

.pitch ul {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.pitch li {
  position: relative;
  padding-left: 1.6rem;
  margin: 0.55rem 0;
  color: var(--fg);
  opacity: 0.85;
}

.pitch li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  transform: rotate(45deg);
}

.pitch li b {
  color: var(--fg);
  font-weight: 600;
  opacity: 1;
}

/* ---------- cards ---------- */

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.feat {
  --h: 220; /* fallback for a card that does not set one */
  background: hsl(var(--h) var(--tint-bg));
  border: 1px solid hsl(var(--h) var(--tint-border));
  border-radius: 12px;
  padding: 1.15rem 1.2rem;
}

.feat .ic {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  margin-bottom: 0.8rem;
  background: hsl(var(--h) var(--tint-chip));
  border: 1px solid hsl(var(--h) var(--tint-chip-border));
}

.feat .ic svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: hsl(var(--h) var(--tint-ink));
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feat h3 {
  margin: 0 0 0.3rem;
  font-size: 15.5px;
}

.feat p {
  margin: 0;
  color: var(--dim);
  font-size: 13.5px;
}

/* the pieces the library is made of */

.pieces {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .pieces {
    grid-template-columns: repeat(3, 1fr);
  }
}

.piece {
  --h: 220;
  background: hsl(var(--h) var(--tint-bg));
  border: 1px solid hsl(var(--h) var(--tint-border));
  border-radius: 12px;
  padding: 1.2rem;
}

.piece .tag {
  display: inline-block;
  font: 600 11px/1 ui-monospace, monospace;
  letter-spacing: 0.03em;
  color: hsl(var(--h) var(--tint-ink));
  background: hsl(var(--h) var(--tint-chip));
  border: 1px solid hsl(var(--h) var(--tint-chip-border));
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  margin-bottom: 0.7rem;
}

.piece h3 {
  margin: 0 0 0.35rem;
  font-size: 16px;
}

.piece p {
  margin: 0;
  color: var(--dim);
  font-size: 13.5px;
}

/* chips */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font-size: 13.5px;
}

.chip b {
  color: var(--fg);
  font-family: ui-monospace, monospace;
  font-size: 13px;
}

.chip span {
  color: var(--dim);
  font-size: 12.5px;
}

/* example cards */

.subhead {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--dimmer);
  margin: 1.9rem 0 0.9rem;
  font-weight: 600;
}

.subhead:first-of-type {
  margin-top: 0;
}

.card {
  --h: 220;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  background: hsl(var(--h) var(--tint-bg));
  border: 1px solid hsl(var(--h) var(--tint-border));
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease,
    box-shadow 0.12s ease;
}

.card:hover {
  transform: translateY(-3px);
  background: hsl(var(--h) var(--tint-bg-hover));
  border-color: hsl(var(--h) var(--tint-border-hover));
  box-shadow: var(--shadow-lift);
}

.card .ic {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  margin-bottom: 0.85rem;
  background: hsl(var(--h) var(--tint-chip));
  border: 1px solid hsl(var(--h) var(--tint-chip-border));
  transition: background 0.12s ease, border-color 0.12s ease;
}

.card:hover .ic {
  background: hsl(var(--h) var(--tint-chip-hover));
  border-color: hsl(var(--h) var(--tint-chip-border-hover));
}

.card .ic svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: hsl(var(--h) var(--tint-ink));
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.body {
  padding: 1.15rem 1.2rem 1.25rem;
}

.body .tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: hsl(var(--h) var(--tint-ink));
  background: hsl(var(--h) var(--tint-chip));
  border: 1px solid hsl(var(--h) var(--tint-chip-border));
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}

.body h3 {
  margin: 0 0 0.25rem;
  font-size: 16px;
}

.body p {
  margin: 0;
  color: var(--dim);
  font-size: 13.5px;
}

/* ---------- demo pages ---------- */

.page-head {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--line-soft);
  max-width: 1100px;
  margin: 0 auto;
}

.page-head h1 {
  margin: 0;
  font-size: clamp(26px, 4vw, 34px);
  letter-spacing: -0.02em;
}

.page-head p {
  margin: 0.6rem 0 0;
  color: var(--dim);
  max-width: 46rem;
}

.back {
  display: inline-block;
  margin-bottom: 0.8rem;
  font-size: 12.5px;
  color: var(--dim);
  text-decoration: none;
}

.back:hover {
  color: var(--fg);
}

main.demo {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  padding: 2rem 0 1rem;
  align-items: start;
}

@media (min-width: 900px) {
  main.demo {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

.stage {
  min-width: 0;
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

#gui-container {
  position: sticky;
  top: 1.25rem;
}

@media (max-width: 899px) {
  #gui-container {
    position: static;
  }
}

/* the small labels above each block on a demo page — scoped, so the section headings on the
   landing page are not caught by it */
.stage h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--dimmer);
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.readout {
  background: var(--card-deep);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.95rem 1.1rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--readout-fg);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  line-height: 1.65;
  min-height: 44px;
  overflow-x: auto;
}

.log {
  max-height: 240px;
  overflow-y: auto;
  color: var(--fg);
}

.log .new {
  color: var(--accent-text);
}

.note {
  border-left: 2px solid var(--line);
  padding-left: 0.95rem;
  color: var(--dim);
  max-width: 46rem;
  font-size: 14px;
}

.note strong {
  color: var(--fg);
  font-weight: 600;
}

kbd {
  border: 1px solid var(--chrome-border);
  border-radius: 4px;
  padding: 0 5px;
  background: var(--eyebrow-bg);
  font: inherit;
  font-size: 12px;
}

canvas {
  border-radius: 12px;
}

/* the range-slider page's plain form */

form label {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  color: var(--dim);
}

form range-slider {
  --gui-track: var(--line);
  --gui-fill: var(--accent);
  --gui-thumb: #ffffff;
  --gui-thumb-hover: #fff3e0;
}

/* ---------- the live reference grid ---------- */

.ref-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.ref-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.ref-item pre.code {
  padding: 0.7rem 0.9rem 0.95rem;
  font-size: 12px;
  border-top: 1px solid var(--line-soft);
  background: var(--card-deep);
}

/* A panel with nothing but the row in it — no title bar, no fold, no shadow. The reference
   shows controls, not panels. */
.gui.gui-bare {
  background: transparent;
  box-shadow: none;
  padding: 0.85rem 0.95rem;
  border-radius: 0;
  --gui-label-width: 128px;
}

.gui.gui-bare .gui-title {
  display: none;
}

.gui.gui-bare .gui-rows {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

/* ---------- footer ---------- */

footer {
  margin-top: 4rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line-soft);
  color: var(--dimmer);
  font-size: 13.5px;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}

footer a {
  color: var(--dim);
  text-decoration: none;
}

footer a:hover {
  color: var(--fg);
}

/* ---------- narrow screens ---------- */

/* A grid item's default min-width is `auto`, which means "no narrower than my contents". A
   code block's contents are unbreakable lines, so on a phone every grid holding one refused to
   shrink and pushed the page out to 530px inside a 390px viewport. Grid and flex children get
   a floor of zero instead, and the code scrolls inside its own card, which it was already set
   up to do. */
.pitch > *,
.pitch.narrow > *,
.grid > *,
.pieces > *,
.cells > *,
.stage > *,
main.demo > * {
  min-width: 0;
}

@media (max-width: 620px) {
  main,
  header,
  footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* The hero is the one place the type is set large enough to need reining in. */
  .hero h1 {
    font-size: clamp(2rem, 9vw, 3rem);
  }

  .cta {
    flex-wrap: wrap;
  }

  /* The panel already fills its container, so it needs no width here — but its label column
     is a fixed 140px, which is over a third of a phone screen. The controls get the room. */
  .gui {
    --gui-label-width: 104px;
    --gui-padding: 14px;
  }

  /* Tables of any width scroll rather than stretching the page. */
  .readout {
    overflow-x: auto;
  }
}