/* SLATE for the web, reduced to what three static pages need. No framework and
   nothing fetched from anywhere — a site backing a "nothing leaves your device"
   claim must not itself call out to a CDN, so the four app faces are subset and
   self-hosted beside this file. Values track app/lib/theme/sf.dart. */

/* ── Faces ─────────────────────────────────────────────────────────────────
   Same four families as the app, same one job each: Barlow Condensed for caps
   labels and titles, Space Grotesk for every numeral, IBM Plex Mono for meta
   lines, DM Sans for body copy. Licences sit in fonts/OFL-*.txt. */
@font-face {
  font-family: "Barlow Condensed";
  src: url("/fonts/barlow-condensed-600.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Barlow Condensed";
  src: url("/fonts/barlow-condensed-700.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("/fonts/dm-sans-400.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("/fonts/dm-sans-700.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/fonts/plex-mono-400.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Space Grotesk";
  src: url("/fonts/space-grotesk-500.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}

/* ── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --base: #0e1014;
  --surface: #1e232b;
  --sunken: #14181d;
  --input: #262c36;
  --hairline: #2c323d;
  --hairline-soft: #262c36;

  --slate: #8d9bb5;
  --clay: #e9a98f;
  --paper: #edeff4;

  --text: #edeff4;
  --text-2: #c5cad4;
  --muted: #8a91a0;
  --on-field: #141620;
  --live: #ff6a2b;

  --condensed: "Barlow Condensed", "Helvetica Neue Condensed", Impact, sans-serif;
  --numeral: "Space Grotesk", ui-monospace, "SF Mono", monospace;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --body: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --measure: 720px;
  --gutter: 22px;
  --r-card: 18px;
  --r-row: 14px;
  --r-chip: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--base);
  color: var(--text-2);
  font: 400 16.5px/1.68 var(--body);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); }

/* A keyboard user should not have to tab the whole nav on every page. */
.skip {
  position: absolute; left: -9999px;
  background: var(--paper); color: var(--on-field);
  padding: 10px 16px; border-radius: var(--r-chip);
  font: 600 13px/1 var(--condensed); letter-spacing: .1em; text-transform: uppercase;
}
.skip:focus { left: 12px; top: 12px; z-index: 20; }

:focus-visible {
  outline: 2px solid var(--slate);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
.site-head {
  position: sticky; top: 0; z-index: 10;
  background: rgba(14, 16, 20, .88);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.site-head .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 60px;
}

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text);
  font: 600 16px/1 var(--condensed);
  letter-spacing: .14em; text-transform: uppercase;
}
.brand svg { display: block; flex: none; }

.site-nav { display: flex; gap: 4px; }
.site-nav a {
  display: inline-flex; align-items: center;
  padding: 7px 12px; border-radius: var(--r-chip);
  color: var(--muted); text-decoration: none;
  font: 600 13.5px/1 var(--condensed);
  letter-spacing: .11em; text-transform: uppercase;
  transition: color .14s ease-out, background .14s ease-out;
}
.site-nav a:hover { color: var(--text); background: var(--input); }
.site-nav a[aria-current="page"] { color: var(--on-field); background: var(--slate); }

/* ── Page head ──────────────────────────────────────────────────────────── */
main { display: block; padding-bottom: 8px; }

.page-head { padding: 52px 0 4px; }
.eyebrow {
  margin: 0 0 14px;
  font: 400 12px/1 var(--mono);
  letter-spacing: .16em; text-transform: uppercase; color: var(--muted);
}
h1 {
  margin: 0;
  font: 700 clamp(38px, 8vw, 60px)/1.02 var(--condensed);
  letter-spacing: -.005em; text-transform: uppercase; color: var(--text);
}
.updated {
  margin: 14px 0 0;
  font: 400 12px/1 var(--mono);
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.lede {
  margin: 22px 0 0;
  font-size: 19px; line-height: 1.62; color: var(--text);
  max-width: 60ch;
}

/* ── Sections ───────────────────────────────────────────────────────────── */
section { padding-top: 44px; scroll-margin-top: 76px; }
section > :first-child { margin-top: 0; }

h2 {
  margin: 0 0 6px;
  font: 600 clamp(22px, 4vw, 27px)/1.16 var(--condensed);
  letter-spacing: .015em; text-transform: uppercase; color: var(--text);
}
h3 {
  margin: 26px 0 6px;
  font: 700 17px/1.4 var(--body);
  letter-spacing: -.005em; color: var(--text);
}

/* Numbered sections read as a document you can navigate, not a wall. */
.numbered { counter-reset: sec; }
.numbered > section > h2::before {
  counter-increment: sec;
  content: counter(sec, decimal-leading-zero);
  display: block;
  margin-bottom: 9px;
  font: 400 12px/1 var(--mono);
  letter-spacing: .16em; color: var(--slate);
  text-transform: none;
}

p { margin: 0 0 15px; max-width: 68ch; }
p:last-child { margin-bottom: 0; }
strong { color: var(--text); font-weight: 700; }
em { color: var(--text); }

a { color: var(--slate); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--text); }

code {
  font: 400 .88em/1 var(--mono);
  background: var(--input); color: var(--text);
  padding: 3px 6px; border-radius: 6px;
  border: 1px solid var(--hairline);
}

/* ── Lists ──────────────────────────────────────────────────────────────── */
ul { margin: 0 0 15px; padding: 0; list-style: none; max-width: 68ch; }
ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
}
ul li::before {
  content: "";
  position: absolute; left: 2px; top: .68em;
  width: 7px; height: 2px; border-radius: 1px;
  background: var(--slate);
}
ul li:last-child { margin-bottom: 0; }

/* ── Cards ──────────────────────────────────────────────────────────────── */
.callout {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  padding: 20px 22px;
  margin: 26px 0;
}
.callout p { margin-bottom: 12px; }

/* The one saturated field per page: a large muted surface with dark ink on it,
   which is the whole SLATE inversion. Reserve it for the page's loudest claim. */
.field {
  background: var(--slate);
  color: var(--on-field);
  border-radius: var(--r-card);
  padding: 24px 24px 26px;
  margin: 30px 0;
}
.field .label {
  margin: 0 0 12px;
  font: 600 12.5px/1 var(--condensed);
  letter-spacing: .18em; text-transform: uppercase;
  color: rgba(20, 22, 32, .8); /* 4.63:1 on slate; .66 measured 3.52:1 */
}
.field p { color: #1b1e2a; margin-bottom: 12px; max-width: 62ch; }
.field p:last-child { margin-bottom: 0; }
.field strong { color: var(--on-field); }
.field code {
  background: rgba(20, 22, 32, .1);
  border-color: rgba(20, 22, 32, .22);
  color: var(--on-field);
}
.field a { color: var(--on-field); }

/* ── Stat grid — label · numeral · meta, the app's card grammar ─────────── */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 10px;
  margin: 30px 0 0;
}
.stat {
  display: flex; flex-direction: column;
  background: var(--sunken);
  border: 1px solid var(--hairline);
  border-radius: var(--r-row);
  padding: 15px 16px 16px;
}
.stat .label {
  display: block;
  min-height: 2.5em; /* two lines, so every value in the row shares a baseline */
  font: 600 11.5px/1.25 var(--condensed);
  letter-spacing: .16em; text-transform: uppercase; color: var(--muted);
}
.stat .value {
  display: block; margin: 9px 0 7px;
  font: 500 34px/1 var(--numeral);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em; color: var(--text);
}
.stat .value .unit { font-size: .45em; letter-spacing: .04em; color: var(--muted); }
.stat .meta {
  display: block; margin-top: auto;
  font: 400 10.5px/1.4 var(--mono);
  letter-spacing: .09em; text-transform: uppercase; color: var(--muted);
}

/* ── Table of contents ──────────────────────────────────────────────────── */
.toc {
  margin: 34px 0 0;
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  background: var(--sunken);
  padding: 8px;
}
.toc h2 {
  font: 600 11.5px/1 var(--condensed);
  letter-spacing: .18em; color: var(--muted);
  margin: 0; padding: 12px 14px 10px;
}
.toc ol {
  counter-reset: toc; list-style: none;
  margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 2px;
}
.toc li { margin: 0; }
.toc a {
  display: flex; gap: 12px; align-items: baseline;
  padding: 9px 14px; border-radius: var(--r-chip);
  color: var(--text-2); text-decoration: none;
  font-size: 15px;
  transition: background .14s ease-out, color .14s ease-out;
}
.toc a::before {
  counter-increment: toc;
  content: counter(toc, decimal-leading-zero);
  font: 400 11.5px/1 var(--mono); color: var(--slate);
  flex: none;
}
.toc a:hover { background: var(--input); color: var(--text); }

/* ── Split comparison ───────────────────────────────────────────────────── */
.split {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 10px; margin: 22px 0; max-width: none;
}
.split > div {
  background: var(--sunken);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  padding: 18px 20px 20px;
}
.split h3 {
  margin: 0 0 12px; padding-bottom: 11px;
  border-bottom: 1px solid var(--hairline);
  font: 600 12.5px/1 var(--condensed);
  letter-spacing: .16em; text-transform: uppercase; color: var(--slate);
}
.split ul, .split p { max-width: none; }
.split p { font-size: 15.5px; }

/* ── Settings breadcrumb ────────────────────────────────────────────────── */
.path {
  display: inline-flex; flex-wrap: wrap; align-items: center;
  gap: 6px 0;
  vertical-align: baseline;
}
.path span {
  display: inline-block;
  background: var(--input);
  border: 1px solid var(--hairline);
  border-radius: 7px;
  padding: 3px 8px;
  font: 600 12px/1.35 var(--condensed);
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--text);
  white-space: nowrap;
}
.path span { position: relative; }
.path span + span { margin-left: 22px; }
.path span + span::before {
  content: "\2192";
  position: absolute; left: -22px; top: 50%; transform: translateY(-50%);
  width: 22px; text-align: center;
  color: var(--muted);
  font: 400 12px/1 var(--mono); letter-spacing: 0;
}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 46px; padding: 0 20px;
  border-radius: var(--r-row);
  background: var(--paper); color: var(--on-field);
  text-decoration: none;
  font: 600 15px/1 var(--condensed);
  letter-spacing: .1em; text-transform: uppercase;
  transition: transform .14s ease-out, background .14s ease-out;
}
.btn:hover { background: #fff; color: var(--on-field); transform: translateY(-1px); }
.btn--ghost {
  background: transparent; color: var(--text);
  box-shadow: inset 0 0 0 1px var(--hairline);
}
.btn--ghost:hover { background: var(--input); color: var(--text); }
.btn--ink { background: var(--on-field); color: var(--paper); }
.btn--ink:hover { background: #0a0c14; color: var(--paper); }
/* `.field a` is more specific than `.btn--ink`; without this the label goes
   ink-on-ink and the button renders as an empty slab. */
.field .btn--ink,
.field .btn--ink:hover { color: var(--paper); }
.btn .mono {
  font: 400 13.5px/1 var(--mono);
  letter-spacing: .02em; text-transform: none;
}

/* ── Contact card ───────────────────────────────────────────────────────── */
.contact {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 26px 34px; align-items: start;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  padding: 26px;
  margin: 30px 0 0;
}
.contact .label {
  display: block; margin-bottom: 10px;
  font: 600 12px/1 var(--condensed);
  letter-spacing: .18em; text-transform: uppercase; color: var(--muted);
}
.contact .addr {
  margin: 0 0 16px;
  font: 500 clamp(19px, 3.4vw, 25px)/1.2 var(--numeral);
  letter-spacing: -.015em; color: var(--text);
  word-break: break-word;
}
.contact .addr a { color: inherit; text-decoration: none; }
.contact .addr a:hover { text-decoration: underline; }
.contact ul { margin: 0; }
.contact li { font-size: 15.5px; }
@media (max-width: 620px) { .contact { grid-template-columns: 1fr; } }

.field.contact { background: var(--slate); border-color: transparent; }
.field.contact .label { color: rgba(20, 22, 32, .8); }
.field.contact .addr,
.field.contact strong { color: var(--on-field); }
.field.contact li { color: #1b1e2a; }
.field.contact li::before { background: rgba(20, 22, 32, .45); }

/* ── FAQ ────────────────────────────────────────────────────────────────── */
.jump {
  display: flex; flex-wrap: wrap; gap: 7px;
  margin: 30px 0 0; padding: 0; list-style: none;
}
.jump li { margin: 0; padding: 0; }
.jump li::before { display: none; }
.jump a {
  display: inline-block;
  background: var(--sunken);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  padding: 8px 13px;
  color: var(--text-2); text-decoration: none;
  font-size: 14px; line-height: 1.3;
  transition: background .14s ease-out, color .14s ease-out, border-color .14s ease-out;
}
.jump a:hover { background: var(--input); color: var(--text); border-color: var(--slate); }

.qa {
  border-top: 1px solid var(--hairline);
  padding-top: 26px; margin-top: 26px;
  scroll-margin-top: 76px;
}
.qa:first-of-type { border-top: 0; padding-top: 0; }
.qa h2 { font-size: clamp(20px, 3.4vw, 24px); margin-bottom: 10px; }

/* ── Contact block (postal) ─────────────────────────────────────────────── */
.controller {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px;
  background: var(--sunken);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  padding: 22px 24px;
  margin: 22px 0 0;
}
.controller .label {
  display: block; margin-bottom: 9px;
  font: 600 11.5px/1 var(--condensed);
  letter-spacing: .18em; text-transform: uppercase; color: var(--muted);
}
.controller address {
  font-style: normal; font-size: 15.5px; line-height: 1.6; color: var(--text-2);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.site-foot {
  margin-top: 72px;
  border-top: 1px solid var(--hairline);
  padding: 30px 0 46px;
}
.site-foot .wrap {
  display: flex; flex-wrap: wrap; gap: 16px 28px;
  align-items: center; justify-content: space-between;
}
.foot-links { display: flex; flex-wrap: wrap; gap: 4px; }
.foot-links a {
  padding: 6px 11px; border-radius: var(--r-chip);
  color: var(--muted); text-decoration: none;
  font: 600 13px/1 var(--condensed);
  letter-spacing: .11em; text-transform: uppercase;
}
.foot-links a:hover { color: var(--text); background: var(--input); }
.foot-note {
  margin: 0;
  font: 400 11.5px/1.5 var(--mono);
  letter-spacing: .09em; text-transform: uppercase; color: var(--muted);
}

/* The header is the one row that has to survive a 320px phone. Tighten the nav
   first; below 360 the capsule mark carries the brand and the word steps out. */
@media (max-width: 460px) {
  .site-head .wrap { gap: 10px; min-height: 54px; }
  .brand { font-size: 14px; letter-spacing: .09em; gap: 8px; }
  .brand svg { width: 26px; height: 18px; }
  .site-nav a { padding: 7px 9px; font-size: 12.5px; letter-spacing: .07em; }
}
@media (max-width: 360px) {
  .brand .wordmark { position: absolute; left: -9999px; }
}

@media (max-width: 520px) {
  :root { --gutter: 18px; }
  .page-head { padding-top: 38px; }
  .field, .callout { padding: 19px; }
  .contact { padding: 20px; }
}