/* Pages: the hero stage, the module register, the guide, the demos, the
   reference. Everything below reads its colour from base.css. */

/* --- shared page head --------------------------------------------------- */

.page-head {
  padding: clamp(48px, 7vw, 92px) 0 clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}

.page-head h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  letter-spacing: -0.035em;
  margin: 18px 0 0;
}

.page-head .lede {
  margin-top: 20px;
  max-width: 62ch;
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.6;
  color: var(--ink-2);
}

.page-head .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 30px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

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

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  /* The copy is shorter than the stage on tall screens; centring the row keeps
     the slack even above and below instead of leaving it all under the plate. */
  align-items: center;
  padding: clamp(30px, 4vw, 56px) 0 clamp(20px, 3vw, 40px);
  min-height: calc(100svh - var(--bar));
}

.hero-copy {
  /* The column is already the measure; a second `ch` cap here was narrower than
     the heading and broke "Plan the path." across two lines. */
  max-width: 100%;
}

.hero h1 {
  font-size: clamp(2.9rem, 6.4vw, 5.4rem);
  line-height: 0.94;
  letter-spacing: -0.042em;
  margin: 22px 0 0;
  font-weight: 600;
}

.hero h1 span {
  color: var(--ink-3);
}

.hero .lede {
  margin-top: 26px;
  font-size: clamp(15.5px, 1.45vw, 17.5px);
  line-height: 1.62;
  color: var(--ink-2);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 40px 0 0;
  border-top: 1px solid var(--line);
}

.hero-facts div {
  padding: 16px 14px 0 0;
  border-right: 1px solid var(--line);
}

.hero-facts div:last-child {
  border-right: 0;
}

.hero-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 21px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.hero-facts dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 4px;
}

.stage {
  position: relative;
  aspect-ratio: 1 / 0.92;
  min-height: 380px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background:
    radial-gradient(
      120% 90% at 54% 8%,
      color-mix(in srgb, var(--amber) 9%, transparent),
      transparent 62%
    ),
    linear-gradient(
      to bottom,
      color-mix(in srgb, var(--panel) 70%, transparent),
      var(--paper)
    );
  overflow: hidden;
  isolation: isolate;
}

.stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: radial-gradient(120% 100% at 50% 40%, #000 40%, transparent 88%);
  pointer-events: none;
}

.stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.stage .corner {
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--line-2);
  border-style: solid;
  border-width: 0;
}

.stage .corner.tl {
  top: 8px;
  left: 8px;
  border-top-width: 1px;
  border-left-width: 1px;
}
.stage .corner.tr {
  top: 8px;
  right: 8px;
  border-top-width: 1px;
  border-right-width: 1px;
}
.stage .corner.bl {
  bottom: 8px;
  left: 8px;
  border-bottom-width: 1px;
  border-left-width: 1px;
}
.stage .corner.br {
  bottom: 8px;
  right: 8px;
  border-bottom-width: 1px;
  border-right-width: 1px;
}

.hud {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  /* The UA margin on a `dl` would otherwise hold the strip 16px off the floor
     that `bottom` asks for. */
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  font-family: var(--font-mono);
}

.hud div {
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(6px);
  padding: 7px 9px 8px;
}

.hud dt {
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.hud dd {
  margin: 2px 0 0;
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  white-space: nowrap;
}

.stage-note {
  position: absolute;
  top: 12px;
  left: 14px;
  max-width: 54%;
  display: grid;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  z-index: 3;
}

.stage-note > * {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stage-note b {
  font-weight: 500;
  color: var(--ink-2);
  letter-spacing: 0.14em;
}

.stage-note i {
  font-style: normal;
  letter-spacing: 0.12em;
  opacity: 0.8;
}

.stage-env {
  position: absolute;
  top: 46px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  opacity: 0.72;
  font-variant-numeric: tabular-nums;
  z-index: 3;
}

/* Cell selector: three machines, one at a time. */
.cell-rail {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 4;
  display: flex;
  gap: 1px;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.cell-rail button {
  appearance: none;
  margin: 0;
  border: 0;
  border-radius: 0;
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 5px 8px 4px;
  background: color-mix(in srgb, var(--paper) 84%, transparent);
  backdrop-filter: blur(6px);
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    color 0.18s var(--ease),
    background 0.18s var(--ease);
}

.cell-rail button .n {
  color: var(--ink-3);
  opacity: 0.7;
}

.cell-rail button:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
}

.cell-rail button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--paper);
  box-shadow: inset 0 -1.5px 0 var(--amber);
}

.cell-rail button[aria-pressed="true"] .n {
  color: var(--amber);
  opacity: 1;
}

.cell-meter {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 4;
  width: 100%;
  height: 1px;
  background: var(--amber);
  opacity: 0.5;
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.stage[data-live="0"] .cell-rail,
.stage[data-live="0"] .cell-meter,
.stage[data-live="0"] .stage-env {
  display: none;
}

/* The plate is a control surface, not a document: drag the machine round with
   the pointer, and keep the browser's own text and image gestures out of it. */
.stage,
.stage * {
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-user-drag: none;
}

.stage {
  touch-action: pan-y;
  cursor: grab;
}

.stage:active {
  cursor: grabbing;
}

.stage canvas {
  pointer-events: none;
}

/* Advertises the drag once, then stays out of the way. It carries the same
   plate as the HUD cells so it stays legible over the machine bed. */
.stage-hint {
  position: absolute;
  left: 50%;
  bottom: 76px;
  z-index: 5;
  transform: translateX(-50%);
  padding: 4px 9px 3px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(6px);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}

/* There is no drag on a touch screen, so the hint would be a dead label. */
@media (hover: none) {
  .stage-hint {
    display: none;
  }
}

/* A visitor who has asked for less motion gets a still plate, which cannot be
   dragged either; neither the hint nor the grab cursor belongs there. */
@media (prefers-reduced-motion: reduce) {
  .stage-hint {
    display: none;
  }
  .stage,
  .stage:active {
    cursor: default;
  }
}

.stage:hover .stage-hint,
.stage:focus-within .stage-hint {
  opacity: 1;
}

.stage[data-dragged="1"] .stage-hint {
  opacity: 0;
}

/* The reticle rides the tool centre point. */
.reticle {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 3;
  width: 30px;
  height: 30px;
  margin: -15px 0 0 -15px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s var(--ease);
  will-change: transform;
}

.stage[data-live="1"] .reticle {
  opacity: 0.85;
}

.reticle b {
  position: absolute;
  width: 7px;
  height: 7px;
  border: 0 solid var(--amber);
}

.reticle b:nth-child(1) {
  top: 0;
  left: 0;
  border-top-width: 1px;
  border-left-width: 1px;
}

.reticle b:nth-child(2) {
  top: 0;
  right: 0;
  border-top-width: 1px;
  border-right-width: 1px;
}

.reticle b:nth-child(3) {
  bottom: 0;
  left: 0;
  border-bottom-width: 1px;
  border-left-width: 1px;
}

.reticle b:nth-child(4) {
  bottom: 0;
  right: 0;
  border-bottom-width: 1px;
  border-right-width: 1px;
}

/* Cells that report their numbers in the HUD keep the frame but drop
   the floating label, so it cannot sit on top of the work. */
.reticle.bare span {
  display: none;
}

.reticle span {
  position: absolute;
  left: 36px;
  padding: 1px 4px;
  border-radius: 1px;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.reticle span:first-of-type {
  top: -3px;
}

.reticle span:last-of-type {
  top: 12px;
}

.stage-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 12%;
  color: var(--line-2);
}

.stage-fallback svg {
  width: 100%;
  height: auto;
}

.stage[data-live="1"] .stage-fallback {
  display: none;
}

@media (width <= 980px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    min-height: 0;
    padding-top: 26px;
  }
  .hero-copy {
    max-width: none;
  }
  .stage {
    aspect-ratio: 1 / 0.86;
    min-height: 0;
    margin-top: 8px;
  }
}

@media (width <= 560px) {
  .stage {
    aspect-ratio: 1 / 0.82;
  }
  .stage-note {
    max-width: calc(100% - 132px);
    font-size: 8.5px;
    letter-spacing: 0.08em;
  }
  .stage-env {
    display: none;
  }
  .cell-rail button {
    padding: 4px 6px 3px;
  }
  .cell-rail button .t {
    display: none;
  }
  .hud {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .hud div {
    padding: 5px 6px 6px;
  }
  .hud dt {
    font-size: 8px;
    letter-spacing: 0.1em;
  }
  .hud dd {
    font-size: 10.5px;
  }
  /* The facts stay on one row: stacked as three rows they cost about a fifth of
     the first screen on a phone, which is the space the stage needs. */
  .hero {
    padding-top: 18px;
  }
  .hero h1 {
    margin-top: 14px;
  }
  .hero .lede {
    margin-top: 16px;
  }
  .hero-actions {
    margin-top: 22px;
  }
  .hero-facts {
    margin-top: 24px;
  }
  .hero-facts div {
    padding: 10px 8px 0 0;
  }
  .hero-facts dd {
    font-size: 17px;
  }
  .hero-facts dt {
    font-size: 8.5px;
    letter-spacing: 0.1em;
  }
}

@media (width > 980px) and (height <= 760px) {
  /* Laptop windows this short cannot hold the full hero at the default
     rhythm; trim the spacing and the display size instead of letting the
     facts row fall below the fold. */
  .hero {
    padding-top: 28px;
    padding-bottom: 24px;
  }
  .hero h1 {
    font-size: clamp(2.6rem, 5.2vw, 4.6rem);
    margin-top: 16px;
  }
  .hero .lede {
    margin-top: 18px;
  }
  .hero-actions {
    margin-top: 24px;
  }
  .hero-facts {
    margin-top: 24px;
  }
  .stage {
    aspect-ratio: 1 / 0.84;
  }
}

@media (width <= 560px) and (height <= 760px) {
  .hero h1 {
    font-size: clamp(2.2rem, 9.6vw, 2.9rem);
  }
  .hero .lede {
    font-size: 14.5px;
    line-height: 1.55;
  }
  .hero-facts {
    margin-top: 18px;
  }
  .stage {
    aspect-ratio: 1 / 0.74;
  }
}

/* --- section rhythm ----------------------------------------------------- */

section {
  scroll-margin-top: calc(var(--bar) + 18px);
}

.band {
  padding: clamp(52px, 8vw, 108px) 0 0;
}

.band-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(16px, 4vw, 56px);
  align-items: end;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.band-head h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  margin-top: 16px;
}

.band-head p {
  color: var(--ink-2);
  font-size: 15px;
  margin: 0;
  max-width: 52ch;
}

@media (width <= 780px) {
  .band-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }
}

/* --- module register ---------------------------------------------------- */

.modules {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--line);
}

.modules li {
  border-top: 1px solid var(--line);
}

.modules li:first-child {
  border-top: 0;
}

.modules a {
  display: grid;
  grid-template-columns: 46px minmax(0, 0.72fr) minmax(0, 1.6fr) 104px 22px;
  gap: 18px;
  align-items: baseline;
  padding: 22px 4px 22px 2px;
  text-decoration: none;
  color: inherit;
  transition: background 0.18s var(--ease);
}

.modules a:hover {
  background: color-mix(in srgb, var(--ink) 4%, transparent);
}

.modules .idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.1em;
}

.modules h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.modules h3 em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: block;
  margin-top: 5px;
}

.modules p {
  margin: 0;
  color: var(--ink-2);
  font-size: 14.5px;
  line-height: 1.55;
}

.modules .count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  text-align: right;
  white-space: nowrap;
}

.modules .go {
  color: var(--ink-3);
  align-self: center;
  transition: transform 0.18s var(--ease), color 0.18s var(--ease);
}

.modules a:hover .go {
  transform: translateX(3px);
  color: var(--amber);
}

@media (width <= 860px) {
  .modules a {
    grid-template-columns: 34px minmax(0, 1fr) 22px;
    gap: 10px 12px;
  }
  .modules p,
  .modules .count {
    grid-column: 2 / 3;
    text-align: left;
  }
  .modules .go {
    grid-column: 3;
    grid-row: 1;
  }
}

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

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 40px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  background: var(--paper);
  padding: 26px 26px 30px;
  display: grid;
  gap: 14px;
  align-content: start;
  position: relative;
  transition: background 0.2s var(--ease);
}

.card:hover {
  background: var(--panel);
}

.card .fig {
  height: 96px;
  color: var(--ink-2);
}

.card .fig svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.card h3 {
  font-size: 17px;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.6;
}

.card code {
  font-size: 12px;
  color: var(--ink);
}

@media (width <= 700px) {
  .cards {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* --- split callout ------------------------------------------------------ */

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: clamp(20px, 4vw, 56px);
  align-items: start;
  margin-top: 40px;
}

.split h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  margin: 14px 0 18px;
}

.split p {
  color: var(--ink-2);
  font-size: 15px;
}

@media (width <= 860px) {
  .split {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* --- guide -------------------------------------------------------------- */

.guide {
  display: grid;
  grid-template-columns: 208px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
  padding-top: 42px;
}

.guide-nav {
  position: sticky;
  top: calc(var(--bar) + 24px);
  border-left: 1px solid var(--line);
}

.guide-nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.guide-nav a {
  display: block;
  padding: 6px 0 6px 14px;
  margin-left: -1px;
  border-left: 1px solid transparent;
  font-size: 13.5px;
  color: var(--ink-3);
  text-decoration: none;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.guide-nav a:hover {
  color: var(--ink);
}

.guide-nav a.active {
  color: var(--ink);
  border-left-color: var(--amber);
}

.guide-nav .cap {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 0 0 10px 14px;
}

@media (width <= 900px) {
  .guide {
    grid-template-columns: minmax(0, 1fr);
  }
  .guide-nav {
    position: static;
    border-left: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 10px 0;
  }
  .guide-nav ol {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .guide-nav a {
    white-space: nowrap;
    border-left: 0;
    border-bottom: 1px solid transparent;
    padding: 6px 10px;
  }
  .guide-nav a.active {
    border-left: 0;
    border-bottom-color: var(--amber);
  }
}

.prose {
  max-width: 74ch;
  min-width: 0;
}

.prose h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 3.2em 0 0.7em;
  padding-top: 0.9em;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar) + 24px);
}

.prose h2:first-of-type {
  margin-top: 0.6em;
  border-top: 0;
  padding-top: 0;
}

.prose h3 {
  font-size: 1.06rem;
  margin: 2em 0 0.6em;
  letter-spacing: 0;
}

.prose p,
.prose li {
  font-size: 15.5px;
  color: var(--ink-2);
}

.prose strong {
  color: var(--ink);
  font-weight: 600;
}

.prose ul,
.prose ol {
  padding-left: 1.2em;
  margin: 0 0 1.1em;
}

.prose li {
  margin-bottom: 0.35em;
}

.prose .code-block {
  margin: 18px 0 0;
}

.prose .out {
  margin: 0 0 26px;
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 var(--r) var(--r);
  background: var(--panel-2);
  padding: 12px 18px 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-2);
  white-space: pre-wrap;
  overflow-x: auto;
}

.prose .code-block + .out {
  margin-top: -1px;
}

.out::before {
  content: "output";
  display: block;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 5px;
}

.prose blockquote {
  margin: 22px 0;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--amber);
  border-radius: 0;
  color: var(--ink-2);
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}

.prose th,
.prose td {
  text-align: left;
  padding: 9px 12px 9px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.prose th {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}

.prose td code {
  overflow-wrap: anywhere;
}

/* --- showcase ----------------------------------------------------------- */

.demo {
  padding: clamp(40px, 6vw, 76px) 0 0;
}

.demo + .demo {
  border-top: 1px solid var(--line);
  margin-top: clamp(40px, 6vw, 76px);
}

.demo-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(12px, 4vw, 56px);
  align-items: end;
  margin-bottom: 26px;
}

.demo-head h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-top: 12px;
}

.demo-head p {
  margin: 0;
  color: var(--ink-2);
  font-size: 14.5px;
  max-width: 56ch;
}

.demo-body {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.demo-canvas {
  position: relative;
  background: var(--panel);
  min-height: 340px;
  display: block;
  overflow: hidden;
}

.demo-canvas[data-tall] {
  min-height: 430px;
}

.demo-canvas canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.demo-canvas[data-interactive] canvas {
  cursor: crosshair;
}

.demo-canvas .hint {
  position: absolute;
  left: 12px;
  bottom: 10px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  pointer-events: none;
}

.demo-side {
  background: var(--paper);
  padding: 20px 20px 22px;
  display: grid;
  gap: 18px;
  align-content: start;
}

.controls {
  display: grid;
  gap: 14px;
}

.controls .row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 10px;
  align-items: baseline;
}

.controls label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.controls output {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.controls input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  height: 18px;
  margin: 2px 0 0;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.controls input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--line-2);
}

.controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  margin-top: -5px;
  border-radius: 1px;
  background: var(--amber);
  border: 1px solid var(--amber);
}

.controls input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--line-2);
}

.controls input[type="range"]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border-radius: 1px;
  background: var(--amber);
  border: 1px solid var(--amber);
}

.seg {
  display: inline-flex;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  overflow: hidden;
}

.seg button {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 11px;
  background: transparent;
  color: var(--ink-2);
  border: 0;
  border-right: 1px solid var(--line);
  cursor: pointer;
}

.seg button:last-child {
  border-right: 0;
}

.seg button[aria-pressed="true"] {
  background: color-mix(in srgb, var(--amber) 16%, transparent);
  color: var(--ink);
}

.readout {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.readout div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  background: var(--panel);
  padding: 7px 10px;
}

.readout dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  align-self: center;
}

.readout dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend i {
  width: 14px;
  height: 2px;
  background: currentColor;
  display: block;
}

@media (width <= 980px) {
  .demo-head,
  .demo-body {
    grid-template-columns: minmax(0, 1fr);
  }
  .demo-head {
    gap: 12px;
  }
  .demo-canvas {
    min-height: 280px;
  }
}

/* --- API reference ------------------------------------------------------ */

.api {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
  padding-top: 36px;
}

.api-nav {
  position: sticky;
  top: calc(var(--bar) + 22px);
  max-height: calc(100svh - var(--bar) - 44px);
  overflow-y: auto;
  padding-right: 8px;
  font-size: 13px;
}

.api-nav .grp {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 22px 0 8px;
}

.api-nav .grp:first-child {
  margin-top: 0;
}

.api-nav a {
  display: block;
  padding: 3.5px 0 3.5px 10px;
  border-left: 1px solid var(--line);
  color: var(--ink-2);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.api-nav a:hover {
  color: var(--ink);
  border-left-color: var(--line-2);
}

.api-nav a.top {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 13.5px;
  letter-spacing: 0;
  padding-top: 8px;
  padding-bottom: 8px;
}

.api-nav a.active {
  color: var(--amber);
  border-left-color: var(--amber);
}

.api-main {
  min-width: 0;
  max-width: 78ch;
}

.api-pkg {
  padding-top: 8px;
  margin-bottom: 64px;
}

.api-pkg > header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
  margin-bottom: 8px;
}

.api-pkg h2 {
  font-family: var(--font-mono);
  font-size: 21px;
  letter-spacing: -0.01em;
  font-weight: 500;
}

.api-pkg .path {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  margin-top: 6px;
}

.api-pkg > p {
  color: var(--ink-2);
  font-size: 14.5px;
  margin-top: 16px;
}

.api-entry {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar) + 20px);
}

.api-entry:last-child {
  border-bottom: 0;
}

.api-entry h3 {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
}

.api-entry h3 .kind {
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 1px 5px;
}

.api-entry h3 a {
  color: var(--ink-3);
  text-decoration: none;
  font-size: 12px;
}

.api-entry h3 a:hover {
  color: var(--amber);
}

.api-entry .sig {
  margin: 12px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--r) var(--r) 0;
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}

.api-entry .doc {
  margin-top: 12px;
  color: var(--ink-2);
  font-size: 14.5px;
}

.api-entry .doc p {
  margin: 0 0 0.7em;
}

.api-entry .doc p:last-child {
  margin-bottom: 0;
}

.api-entry .doc code {
  font-size: 12.5px;
}

.fields {
  margin: 14px 0 0;
  border-top: 1px solid var(--line);
}

.fields dd .fd {
  display: block;
  margin-top: 2px;
  font-family: var(--font-body);
  font-size: 12.5px;
  color: var(--ink-2);
}

.api-group {
  margin: 34px 0 0;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.fields div {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 14px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
}

.fields dt {
  color: var(--ink);
}

.fields dd {
  margin: 0;
  color: var(--ink-3);
  overflow-wrap: anywhere;
}

@media (width <= 900px) {
  .api {
    grid-template-columns: minmax(0, 1fr);
  }
  .api-nav {
    position: static;
    max-height: 260px;
    border-bottom: 1px solid var(--line);
    padding-bottom: 12px;
  }
}

/* --- reveal ------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}