/*
 * Porthole site: tokens, type, the shared shell, and the small set of primitives every
 * page uses. The device mock-ups live in kit.css and keep the app's dark palette on
 * either page theme.
 *
 * Colour: the app's Porthole palette (Theme.kt) is the dark theme. The app has no light
 * Porthole palette, so the light theme below is the same hues, re-weighted for a light
 * ground and checked for AA contrast on it.
 */

/* Schibsted Grotesk (SIL Open Font License, see fonts/OFL-SchibstedGrotesk.txt), a variable font, served from
   here rather than Google Fonts: a stylesheet from another server held up every page's first
   paint. Split like Google splits it, so most pages load only the Latin file. */
@font-face {
  font-family: "Schibsted Grotesk";
  src: url("fonts/schibsted-grotesk-latin.woff2") format("woff2");
  font-weight: 400 900; font-style: normal; font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Schibsted Grotesk";
  src: url("fonts/schibsted-grotesk-latin-ext.woff2") format("woff2");
  font-weight: 400 900; font-style: normal; font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Iosevka Term";
  src: url("fonts/iosevka-term-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Iosevka Term";
  src: url("fonts/iosevka-term-bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light;
  --ground: #F3F7F6;
  --surface: #FFFFFF;
  --raised: #E7EEEC;
  --edge: #D2DDDA;
  --text: #0E1D1B;
  --muted: #45605C;
  --faint: #556B67;
  --accent: #097368;
  --accent-fill: #3FD4C0;
  --on-accent: #07100F;
  --warn: #8A5A00;
  --bad: #B3362C;
  --ok: #23703F;
  --deep: #E7EEEC;
  --focus: #097368;
  --shadow: 0 1px 2px rgb(14 29 27 / .06), 0 8px 24px rgb(14 29 27 / .08);

  --sans: "Schibsted Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Iosevka Term", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Radius (PortholeShape): cards, controls, key caps. */
  --r-card: 14px;
  --r-control: 10px;
  --r-key: 8px;

  /* Motion (PortholeMotion): every entrance is an ease-out with no overshoot. */
  --t-fast: 120ms;
  --t-enter: 200ms;
  --t-exit: 140ms;
  --t-axis: 260ms;
  --t-slow: 360ms;
  --stagger: 40ms;
  --travel: 12px;
  --ease-settle: cubic-bezier(.16, 1, .3, 1);
  --ease-standard: cubic-bezier(.4, 0, .2, 1);
  --ease-leave: cubic-bezier(.3, 0, .7, .4);

  /* Layout. */
  --gutter: 16px;
  --maxw: 1200px;
  --measure: 68ch;
  --header-h: 64px;
}
@media (min-width: 720px) { :root { --gutter: 32px; } }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --ground: #07100F;
    --surface: #0E1A19;
    --raised: #162523;
    --edge: #22322F;
    --text: #E8F0EE;
    --muted: #8FA3A0;
    --faint: #7B908C;
    --accent: #3FD4C0;
    --accent-fill: #3FD4C0;
    --on-accent: #07100F;
    --warn: #E8B54A;
    --bad: #F2685E;
    --ok: #5FCF80;
    --deep: #050B0A;
    --focus: #3FD4C0;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 12px 32px rgb(0 0 0 / .35);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --ground: #07100F;
  --surface: #0E1A19;
  --raised: #162523;
  --edge: #22322F;
  --text: #E8F0EE;
  --muted: #8FA3A0;
  --faint: #7B908C;
  --accent: #3FD4C0;
  --accent-fill: #3FD4C0;
  --on-accent: #07100F;
  --warn: #E8B54A;
  --bad: #F2685E;
  --ok: #5FCF80;
  --deep: #050B0A;
  --focus: #3FD4C0;
  --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 12px 32px rgb(0 0 0 / .35);
}

/* ------------------------------------------------------------------ base --- */

*, *::before, *::after { box-sizing: border-box; }
html {
  background: var(--ground);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 16px);
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font: 400 17px/1.6 var(--sans);
  font-feature-settings: "ss01" 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}
img, svg, video { max-width: 100%; }
img { height: auto; }

h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.12; letter-spacing: -.015em; text-wrap: balance; }
h1 { font-size: clamp(2.25rem, 1.4rem + 3.6vw, 3.75rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.65rem, 1.2rem + 1.8vw, 2.4rem); letter-spacing: -.02em; }
h3 { font-size: 1.25rem; line-height: 1.25; }
h4 { font-size: 1.05rem; line-height: 1.3; }
p, ul, ol, dl { margin: 0; }
p, li { text-wrap: pretty; }

a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); }

.lead { font-size: clamp(1.1rem, 1rem + .45vw, 1.3rem); line-height: 1.5; color: var(--muted); max-width: 44ch; }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.small { font-size: .9rem; line-height: 1.5; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: var(--gutter); top: -100px; z-index: 100;
  background: var(--surface); color: var(--text); border: 1px solid var(--edge);
  border-radius: var(--r-control); padding: 10px 14px; text-decoration: none;
}
.skip:focus { top: 12px; }

/* --------------------------------------------------------------- layout --- */

.wrap { width: 100%; max-width: calc(var(--maxw) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.wrap-narrow { width: 100%; max-width: calc(760px + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.prose { max-width: var(--measure); }
.prose > * + * { margin-top: 1em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: .35em; }
.stack { display: flex; flex-direction: column; gap: var(--gap, 16px); }
.stack > * { min-width: 0; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--gap, 12px); }
/* Text beside a device or scene; stacks below 900px. */
.split { display: grid; grid-template-columns: minmax(0, 1fr); gap: clamp(28px, 4vw, 64px); align-items: center; }
@media (min-width: 900px) {
  .split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .split.flip > :first-child { order: 2; }
}
.grid-2, .grid-3 { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; }
@media (min-width: 720px) { .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.section { padding-block: clamp(56px, 8vw, 112px); }
.section + .section { border-top: 1px solid var(--edge); }
.card { background: var(--surface); border: 1px solid var(--edge); border-radius: var(--r-card); padding: 20px; }
.rule { border: 0; border-top: 1px solid var(--edge); margin: 0; }

/* ---------------------------------------------------------------- shell --- */

.site-h {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid color-mix(in srgb, var(--edge) 70%, transparent);
}
.site-h-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: var(--header-h); }

/* The wordmark: the ring stands in for the "o", as it does in the app. */
.brand {
  display: inline-flex; align-items: center; gap: 0;
  color: var(--text); text-decoration: none;
  font: 600 1.375rem/1 var(--sans); letter-spacing: -.01em;
  padding: 6px 2px; border-radius: 6px;
}
.brand:hover { text-decoration: none; }
.brand-ring { width: .66em; height: .66em; margin-inline: 1px; flex: none; overflow: visible; }
.brand-ring circle { fill: none; stroke: var(--accent); stroke-width: 2.1; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px;
  color: var(--muted); text-decoration: none; font-size: .98rem; font-weight: 500; border-radius: var(--r-control);
  transition: color var(--t-fast) var(--ease-standard), background-color var(--t-fast) var(--ease-standard);
}
.site-nav a:hover { color: var(--text); background: var(--raised); }
.site-nav a[aria-current="page"] { color: var(--text); }
@media (max-width: 420px) { .site-nav a { padding: 0 9px; font-size: .94rem; } .brand { font-size: 1.25rem; } }

.site-f { border-top: 1px solid var(--edge); padding-block: 40px 48px; color: var(--muted); font-size: .94rem; line-height: 1.55; }
.site-f-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; }
.site-f nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.site-f nav a { color: var(--muted); text-decoration: none; display: inline-flex; min-height: 44px; align-items: center; }
.site-f nav a:hover { color: var(--text); text-decoration: underline; }
.site-f .by { margin-top: 20px; color: var(--text); }
.site-f .tm { margin-top: 8px; max-width: 76ch; color: var(--faint); font-size: .86rem; }

/* -------------------------------------------------------------- buttons --- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 12px 20px;
  font: 500 1rem/1.2 var(--sans); color: var(--text); text-decoration: none;
  background: transparent; border: 1px solid var(--edge); border-radius: var(--r-control);
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease-standard), background-color var(--t-fast) var(--ease-standard), border-color var(--t-fast) var(--ease-standard);
}
.btn:hover { background: var(--raised); text-decoration: none; }
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--accent-fill); border-color: var(--accent-fill); color: var(--on-accent); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent-fill) 88%, var(--text)); border-color: transparent; }
.btn svg { width: 20px; height: 20px; flex: none; fill: currentColor; }
.btn small { font-weight: 400; opacity: .75; font-size: .82rem; }

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

code, kbd, samp, pre { font-family: var(--mono); }
code {
  font-size: .9em; background: var(--raised); border: 1px solid var(--edge);
  border-radius: 5px; padding: .05em .35em; word-break: break-word;
}
kbd {
  font-size: .82em; background: var(--raised); border: 1px solid var(--edge); border-bottom-width: 2px;
  border-radius: 6px; padding: .05em .45em; white-space: nowrap;
}
pre {
  margin: 0; font-size: .9rem; line-height: 1.55; color: var(--text);
  background: var(--surface); border: 1px solid var(--edge); border-radius: var(--r-control);
  padding: 14px 16px; overflow-x: auto; tab-size: 4;
}
pre code { background: none; border: 0; padding: 0; font-size: inherit; word-break: normal; }
pre .c { color: var(--faint); }      /* a comment */
pre .p { color: var(--faint); user-select: none; }   /* a prompt, not copied */

/*
 * A command to run, like the app's CommandBlock: mono, accent, on a raised ground. Add
 * data-copy and kit.js adds a copy button; without JavaScript there is no button, so
 * nothing on the page pretends to work.
 */
.cmd {
  display: flex; align-items: center; gap: 8px;
  background: var(--raised); border-radius: var(--r-control);
  padding: 6px 6px 6px 16px; min-height: 48px;
}
.cmd code, .cmd pre {
  flex: 1; min-width: 0; background: none; border: 0; padding: 6px 0; border-radius: 0;
  color: var(--accent); font-size: .95rem; line-height: 1.5; white-space: pre-wrap; overflow-wrap: anywhere;
}
.cmd + .cmd { margin-top: 8px; }
.copy {
  flex: none; min-height: 36px; min-width: 56px; padding: 0 12px;
  font: 500 .8rem/1 var(--sans); color: var(--muted);
  background: transparent; border: 0; border-radius: var(--r-key); cursor: pointer;
}
.copy:hover { color: var(--text); background: color-mix(in srgb, var(--text) 8%, transparent); }
.copy[data-done] { color: var(--ok); }

/* A plain-spoken note: what a thing is, or what it can do to you. */
.note { background: var(--surface); border: 1px solid var(--edge); border-left: 3px solid var(--accent); border-radius: 0 var(--r-control) var(--r-control) 0; padding: 12px 16px; }
.note.warn { border-left-color: var(--warn); }

/* Tables in the docs. */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--edge); }
th { font-weight: 600; color: var(--text); }

/* ------------------------------------------------------------ Mac or Linux --- */
/* Install steps differ by computer. One choice, made on any .os-pick, shows the matching
   [data-os-only] blocks across the page. Without JavaScript both show, each labelled. */
.os-pick { display: none; }
html.os-js .os-pick {
  display: inline-flex; gap: 2px; padding: 3px; border-radius: var(--r-control);
  background: var(--raised); border: 1px solid var(--edge);
}
.os-pick button {
  font: 500 .9rem/1 var(--sans); color: var(--muted); background: none; border: 0;
  padding: 8px 18px; border-radius: var(--r-key); cursor: pointer; min-height: 36px;
}
.os-pick button[aria-pressed="true"] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.os-pick button:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
html[data-os="mac"] [data-os-only="linux"], html[data-os="linux"] [data-os-only="mac"] { display: none !important; }
.os-h { font: 600 .8rem/1.2 var(--sans); letter-spacing: .04em; text-transform: uppercase; color: var(--faint); margin: 0 0 8px; }
html.os-js .os-h { display: none; }
[data-os-only] > * + * { margin-top: 14px; }
[data-os-only] > .cmd + .cmd { margin-top: 8px; }