/* Tokens: the palette of hyperlight.org (Starlight's defaults: blue-gray
   neutrals at hue 224, a blue accent). Light is the default; dark is its
   own set of steps, not an inversion. */
:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --ink: #17181c;
  --ink-2: #353841;
  --muted: #555962;
  --rule: #c1c3c8;
  --link: #3d50f5;
  --accent: #3d50f5;
  --code-key: #0f1c8a;
  --cold: #888c96;
  --focus: #3d50f5;
  --code-bg: #edeef3;
  --term: #17181c;
  --term-ink: #edeef3;
  --term-dim: #9a9ea8;
  --term-rule: #353841;
  --term-hover: #23262f;
  --term-link: #b2c7ff;
  --nav-bg: #f6f7f9;
  --hairline: #edeef3;

  --font: "Schibsted Grotesk", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --wrap: 76rem;
  --gutter: 16px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17181c;
    --surface: #23262f;
    --ink: #edeef3;
    --ink-2: #c1c3c8;
    --muted: #8d919a;
    --rule: #353841;
    --link: #b2c7ff;
    --accent: #3369ff;
    --code-key: #b2c7ff;
    --cold: #656872;
    --focus: #b2c7ff;
    --code-bg: #23262f;
    --term: #23262f;
    --term-rule: #353841;
    --term-hover: #2c303b;
    --nav-bg: #23262f;
    --hairline: #17181c;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #17181c;
  --surface: #23262f;
  --ink: #edeef3;
  --ink-2: #c1c3c8;
  --muted: #8d919a;
  --rule: #353841;
  --link: #b2c7ff;
  --accent: #3369ff;
  --code-key: #b2c7ff;
  --cold: #656872;
  --focus: #b2c7ff;
  --code-bg: #23262f;
  --term: #23262f;
  --term-rule: #353841;
  --term-hover: #2c303b;
  --nav-bg: #23262f;
  --hairline: #17181c;
  color-scheme: dark;
}

@media (min-width: 720px) { :root { --gutter: 2.5rem; } }

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--font);
  font-feature-settings: "tnum" 0;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 3px; }

code, pre { font-family: var(--mono); font-size: 0.86em; }
:not(pre) > code { background: var(--code-bg); padding: 0.08em 0.35em; border-radius: 4px; overflow-wrap: anywhere; }

h1, h2, h3 { margin: 0; text-wrap: balance; }
p { margin: 0; }

.skip { position: absolute; left: -999px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip:focus { left: var(--gutter); top: 0.5rem; background: var(--surface); padding: 0.4rem 0.8rem; z-index: 10; }

/* Header: the nav bar of hyperlight.org (Starlight's), so moving between
   the two sites feels like one. */
.site-header {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--hairline);
}
.site-header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0.85rem var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
}
.brand { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.brand a { text-decoration: none; }
.brand .parent {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--link);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand img { width: 2rem; height: 2rem; }
.brand .sep { color: var(--muted); font-size: 1.2rem; }
.wordmark { color: var(--ink); font-weight: 700; }
.brand a:hover { text-decoration: underline; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 0.2rem 1.2rem; font-size: 0.95rem; }
.site-header nav a { color: var(--ink-2); text-decoration: none; }
.site-header nav a:hover { color: var(--ink); text-decoration: underline; }

main > section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6.5rem) var(--gutter) 0;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
  padding-top: clamp(1.5rem, 5vw, 4rem) !important;
}
@media (min-width: 980px) { .hero { grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); gap: 3.5rem; } }

h1 {
  font-size: clamp(2.5rem, 5.6vw, 4.4rem);
  font-weight: 820;
  line-height: 1.02;
  letter-spacing: -0.035em;
}
.lede { margin-top: 1.4rem; font-size: 1.18rem; color: var(--ink-2); max-width: 36em; }
.then { margin-top: 0.9rem; color: var(--muted); font-size: 0.95rem; }

.install { margin-top: 2rem; }
.tablist { display: flex; gap: 0.2rem; }
.tablist button {
  font: inherit;
  font-size: 0.88rem;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
}
.tablist button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }

.cmd {
  display: flex;
  align-items: stretch;
  background: var(--term);
  color: var(--term-ink);
  border-radius: 8px;
  overflow: hidden;
}
.cmd code {
  flex: 1;
  min-width: 0;
  padding: 0.85rem 1rem;
  background: none;
  font-size: 0.82rem;
  white-space: nowrap;
  overflow-x: auto;
}
.cmd code::before { content: "$ "; color: var(--term-dim); }
.cmd.small code { font-size: 0.8rem; padding: 0.65rem 0.9rem; }
.copy {
  font: 500 0.82rem var(--font);
  background: none;
  color: var(--term-ink);
  border: 0;
  border-left: 1px solid var(--term-rule);
  padding: 0 1rem;
  cursor: pointer;
}
.copy:hover { background: var(--term-hover); }
/* .cmd clips its overflow, so the ring goes inside the button. */
.copy:focus-visible { outline-offset: -3px; }

/* Terminals */
.term {
  margin: 0;
  background: var(--term);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 18px 40px -24px rgba(10, 20, 30, 0.55);
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  color: var(--term-dim);
  font-size: 0.8rem;
  border-bottom: 1px solid var(--term-rule);
}
.term-bar::before {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 1rem 0 0 var(--term-rule), 2rem 0 0 var(--term-rule);
  margin-right: 2.2rem;
}
.term figcaption {
  padding: 0.7rem 0.9rem 0.85rem;
  color: var(--term-dim);
  font-size: 0.82rem;
  border-top: 1px solid var(--term-rule);
}
.term figcaption a { color: var(--term-link); }
.player { min-height: 12rem; }
.player .ap-wrapper { background: var(--term); }
.player .ap-player { border-radius: 0; }
.player-fallback { padding: 1rem; color: var(--term-dim); font-size: 0.9rem; }
.player-fallback a { color: var(--term-link); }

.asciinema-player-theme-hluk {
  --term-color-foreground: #edeef3;
  --term-color-background: #17181c;
  --term-color-0: #17181c;
  --term-color-1: #e5776b;
  --term-color-2: #8fc28a;
  --term-color-3: #e6a64a;
  --term-color-4: #7d9bff;
  --term-color-5: #c79be0;
  --term-color-6: #6fc4c4;
  --term-color-7: #edeef3;
  --term-color-8: #7f8d9c;
  --term-color-9: #f08a7e;
  --term-color-10: #a5d6a0;
  --term-color-11: #f0bd6a;
  --term-color-12: #b2c7ff;
  --term-color-13: #d7b0ec;
  --term-color-14: #8ad6d6;
  --term-color-15: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .asciinema-player-theme-hluk { --term-color-background: #23262f; --term-color-0: #23262f; }
}
:root[data-theme="dark"] .asciinema-player-theme-hluk { --term-color-background: #23262f; --term-color-0: #23262f; }

/* Section heads */
.section-head { max-width: 46rem; margin-bottom: 2rem; }
h2 {
  font-size: clamp(1.85rem, 3.6vw, 2.75rem);
  font-weight: 780;
  line-height: 1.08;
  letter-spacing: -0.028em;
}
.section-head p { margin-top: 0.9rem; color: var(--ink-2); }

.replay {
  font: 500 0.9rem var(--font);
  background: none;
  color: var(--link);
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 0.18em;
  white-space: nowrap;
}

/* The race: the one loud thing on the page. */
.race { display: grid; gap: 1.6rem; padding: 0.5rem 0 0.5rem; }
.lane {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "label value" "track track";
  gap: 0.35rem 1rem;
  align-items: end;
}
@media (min-width: 820px) {
  .lane { grid-template-columns: 15rem 1fr 9.5rem; grid-template-areas: "label track value"; align-items: center; }
}
.lane-label { grid-area: label; display: flex; flex-direction: column; }
.lane-name { font-weight: 700; font-size: 1.05rem; }
.lane-note { color: var(--muted); font-size: 0.86rem; }
.track { grid-area: track; height: 2.4rem; position: relative; border-left: 2px solid var(--ink); }
.track::after { content: ""; position: absolute; left: 0; right: 0; top: 50%; border-top: 1px dashed var(--rule); }
.fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  min-width: 0;
  border-radius: 0 4px 4px 0;
  z-index: 1;
}
.lane[data-lane="cold"] .fill { background: var(--cold); }
.lane[data-lane="snap"] .fill, .lane[data-lane="reset"] .fill { background: var(--accent); }
.lane.done .fill { min-width: 3px; }
.lane-value {
  grid-area: value;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  text-align: right;
  line-height: 1;
}
.lane[data-lane="snap"] .lane-value, .lane[data-lane="reset"] .lane-value { color: var(--link); }

.race-foot { margin-top: 1.8rem; display: flex; flex-wrap: wrap; gap: 0.6rem 2rem; align-items: baseline; justify-content: space-between; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.5rem 0.75rem 0.5rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
thead th { color: var(--muted); font-weight: 500; font-size: 0.86rem; }
.provenance { color: var(--muted); font-size: 0.86rem; max-width: 52rem; }

/* Density: one square per sandbox */
.density-grid { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 900px) { .density-grid { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 3.5rem; } }
.cells {
  display: grid;
  grid-template-columns: repeat(40, 1fr);
  gap: 2px;
}
.cells i { aspect-ratio: 1; background: var(--accent); border-radius: 1px; opacity: 0.85; }
.density-facts { margin: 0; display: grid; gap: 1.3rem; }
.density-facts dt { font-size: clamp(1.6rem, 3.2vw, 2.4rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.density-facts dd { margin: 0.3rem 0 0; color: var(--ink-2); }
.density .provenance { margin-top: 1.8rem; }

/* Languages */
.lang-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; margin-bottom: 2.5rem; }
@media (min-width: 900px) { .lang-layout { grid-template-columns: 13rem minmax(0, 1fr); gap: 2.5rem; } }
.lang-picker { display: flex; flex-wrap: wrap; gap: 0.3rem; align-content: start; }
@media (min-width: 900px) { .lang-picker { flex-direction: column; flex-wrap: nowrap; gap: 0; border-left: 1px solid var(--rule); } }
.lang-picker button {
  font: 500 0.95rem var(--font);
  text-align: left;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink-2);
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
@media (min-width: 900px) {
  .lang-picker button { border: 0; border-left: 2px solid transparent; margin-left: -1px; border-radius: 0; padding: 0.32rem 0.9rem; }
}
.lang-picker button small { color: var(--muted); font-size: 0.78rem; }
.lang-picker button[aria-selected="true"] { color: var(--ink); font-weight: 700; border-color: var(--accent); }
@media (max-width: 899px) { .lang-picker button[aria-selected="true"] { background: var(--ink); color: var(--bg); } .lang-picker button[aria-selected="true"] small { color: inherit; } }
.lang-desc { color: var(--ink-2); margin-bottom: 1rem; max-width: 46rem; }
.lang-desc .note { display: block; color: var(--link); font-size: 0.9rem; margin-top: 0.3rem; }
.files { display: grid; gap: 1rem; margin-top: 1rem; min-width: 0; }
.file { min-width: 0; }
.file h3 { font: 600 0.82rem var(--mono); color: var(--muted); margin-bottom: 0.35rem; }

pre.code {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  line-height: 1.55;
  font-size: 0.8rem;
  tab-size: 4;
}
pre.code code { background: none; padding: 0; font-size: inherit; }
pre.code .c { color: var(--muted); }
pre.code .k { color: var(--code-key); font-weight: 600; }
pre.code .s { color: var(--link); }

/* Extend, deny, embed */
.embed-grid, .deny-grid { display: grid; gap: 1.5rem; align-items: start; }
@media (min-width: 980px) {
  .embed-grid { grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr); }
  .deny-grid { grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 3rem; }
}
.extend .files { margin-top: 0; }
@media (min-width: 980px) {
  .extend .files { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); align-items: start; }
  .extend .files .file:first-child { grid-row: span 2; }
}
.languages > .term, .extend .term { max-width: 58rem; }
.extend .term { margin-top: 2rem; }
.caps { margin: 0; display: grid; gap: 1.1rem; }
.caps div { display: grid; gap: 0.15rem; }
@media (min-width: 640px) { .caps div { grid-template-columns: 7rem 1fr; gap: 1rem; } }
.caps dt { font-weight: 700; }
.caps dd { margin: 0; color: var(--ink-2); }

.platforms h2 { margin-bottom: 1.4rem; }
.platform-table { max-width: 46rem; }
/* Below about 340px "Hypervisor.framework" is wider than this column can
   be; breaking it there is better than scrolling the page sideways. */
@media (max-width: 339.98px) { .platform-table td:nth-child(2) { overflow-wrap: anywhere; } }

.site-footer {
  max-width: var(--wrap);
  margin: clamp(4rem, 9vw, 7rem) auto 0;
  padding: 2rem var(--gutter) 3rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.92rem;
}
.site-footer .histories { margin-top: 0.9rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0.9rem 0 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}