/* Holon's public site: one stylesheet for every page (web/site/, docs/guides/alpha-access.md).
   One world, on purpose: the match table at night. The site stays dark on either host theme and
   paints every colour itself - it is the look of the closed-alpha page the owner approved,
   grown to four pages, not a new identity. */
:root {
  color-scheme: dark;
  --ground: #0d1530;        /* the mat after dark */
  --ground-deep: #070c1d;
  --steel: #4f6fa8;         /* End Turn's steel blue */
  --steel-hi: #7f9fd6;
  --cyan: #5fe3f2;          /* the "nothing left to do" halo */
  --chrome: #e6ecf5;        /* text on the mat */
  --muted: #93a2c2;
  --pearl: #f1f4fa;         /* the satin card forms sit on */
  --pearl-ink: #1b2440;
  --pearl-muted: #4a5678;
  --line: rgba(147, 162, 194, 0.22);
  --panel: linear-gradient(180deg, rgba(79, 111, 168, 0.14), rgba(79, 111, 168, 0.04));
  --foil: linear-gradient(115deg, #7fd8ff, #c7a6ff 22%, #ffd6a5 40%, #9ff2d0 58%, #7fb2ff 76%, #e4b5ff);
  --ok: #7be0a4;
  --fault: #ff8a8a;
  --fault-ink: #a3202b;
  --display: "Michroma", "Eurostile", "Arial Black", sans-serif;
  --body: "Saira", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

/* a component's own display must never un-hide it */
[hidden] { display: none !important; }

html, body { margin: 0; }

body {
  background:
    radial-gradient(120% 70% at 50% -10%, #1d2c5c 0%, transparent 60%),
    radial-gradient(90% 60% at 50% 110%, #101c44 0%, transparent 70%),
    var(--ground-deep);
  background-color: var(--ground-deep);
  color: var(--chrome);
  font: 400 17px/1.6 var(--body);
  padding: 0 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding-block: 56px 40px;
  display: grid;
  gap: 40px;
}

main.wide { max-width: 760px; }

.skip {
  position: absolute; left: 16px; top: -60px;
  background: var(--pearl); color: var(--pearl-ink);
  padding: 8px 14px; border-radius: 8px; z-index: 10;
}
.skip:focus { top: 12px; }

header.hero { display: grid; gap: 28px; justify-items: center; text-align: center; }

.logo { width: min(280px, 70vw); height: auto; display: block; filter: drop-shadow(0 0 22px rgba(95, 227, 242, 0.18)); }

/* the sub-pages' top line: a small logo home, the page's name beside it */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.topbar a.home { display: inline-flex; border-radius: 6px; }
.topbar .logo { width: 132px; }

h1 {
  font: 400 clamp(20px, 4.6vw, 28px)/1.3 var(--display);
  letter-spacing: 0.04em;
  margin: 0;
  text-wrap: balance;
}

.lede { margin: 0; color: var(--muted); max-width: 52ch; text-wrap: pretty; }
.page-head { display: grid; gap: 12px; }
.page-lede { margin: 0; color: var(--muted); text-wrap: pretty; }

h2 {
  font: 400 12px/1.4 var(--display);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 10px;
}

h3 { font: 600 17px/1.4 var(--body); margin: 0 0 6px; }

p { margin: 0; }

a { color: var(--cyan); text-underline-offset: 0.18em; }
a:focus-visible, button:focus-visible, iframe:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px;
}

/* ---- the call to play: the one foil thing above the fold ---------------------------------- */
.actions { display: grid; gap: 14px; justify-items: center; }

.play {
  display: inline-block;
  border-radius: 14px;
  padding: 3px;
  background: var(--foil);
  background-size: 220% 100%;
  animation: foil 9s ease-in-out infinite alternate;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45), 0 0 34px rgba(95, 227, 242, 0.16);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.play span.face {
  display: grid; justify-items: center; gap: 2px;
  min-width: min(300px, 80vw);
  border-radius: 11px;
  padding: 16px 36px 14px;
  background: linear-gradient(180deg, #2a3f72, #16244a);
  color: var(--chrome);
}
.play .word { font: 400 26px/1.1 var(--display); letter-spacing: 0.16em; }
.play .sub { font-size: 14px; color: var(--muted); }
.play:hover { transform: translateY(-1px); box-shadow: 0 18px 46px rgba(0, 0, 0, 0.5), 0 0 44px rgba(95, 227, 242, 0.26); }
.play:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }

.secondary-actions { display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: center; align-items: center; color: var(--muted); font-size: 15px; }

.button-quiet {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(127, 159, 214, 0.55);
  border-radius: 10px;
  padding: 9px 16px;
  color: var(--chrome);
  text-decoration: none;
  background: rgba(79, 111, 168, 0.12);
  font-size: 15px;
}
.button-quiet:hover { background: rgba(79, 111, 168, 0.24); }

.note { color: var(--muted); font-size: 15px; text-align: center; max-width: 46ch; text-wrap: pretty; }

/* ---- panels: what's in, how to help, credits ----------------------------------------------- */
.panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }

.panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  background: var(--panel);
}

/* The three-line data promise, on the request card and /terms/. */
.promise { margin: 0; padding-left: 1.1em; display: grid; gap: 4px; color: var(--chrome); font-size: 15px; max-width: 68ch; }
.promise li::marker { color: var(--steel-hi); }

.panel ul, .prose ul { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; }
.panel li::marker, .prose li::marker { color: var(--steel-hi); }
.panel p + p { margin-top: 8px; }

/* ---- the satin card with a foil edge: forms sit on it ----------------------------------------- */
.card {
  position: relative;
  border-radius: 16px;
  padding: 3px;
  background: var(--foil);
  background-size: 220% 100%;
  animation: foil 9s ease-in-out infinite alternate;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.06);
  scroll-margin-top: 24px;
}

@keyframes foil { from { background-position: 0% 50%; } to { background-position: 100% 50%; } }

.card-inner {
  border-radius: 13px;
  background: linear-gradient(180deg, #ffffff, var(--pearl));
  color: var(--pearl-ink);
  padding: 26px 24px 18px;
  color-scheme: light;      /* form controls on the satin card are drawn light */
}

.card-inner h2 { color: var(--steel); }
.card-inner h1.card-title { font-size: clamp(17px, 3.6vw, 21px); color: var(--pearl-ink); margin: 0 0 14px; }
.card-inner a { color: #245aa8; }
.card-inner a:focus-visible, .card-inner input:focus-visible, .card-inner button:focus-visible { outline-color: #245aa8; }

.card-inner p.hint { margin: 0 0 14px; color: var(--pearl-muted); font-size: 15px; }
.card-inner .promise { margin: 0 0 14px; color: var(--pearl-ink); }
.card-inner .promise li::marker { color: var(--steel); }

iframe { width: 100%; border: 0; display: block; min-height: 420px; }

.not-connected {
  border: 1px dashed #b6c0d8;
  border-radius: 10px;
  padding: 18px;
  color: var(--pearl-muted);
  font-size: 15px;
}
.not-connected code { font-size: 14px; }

/* ---- downloads ------------------------------------------------------------------------------- */
.builds { display: grid; gap: 20px; }

.build { display: grid; gap: 14px; }
.build-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 16px; }
.build-head h2 { margin: 0; font-size: 14px; }
.meta { margin: 0; color: var(--pearl-muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 4px 14px; }
.meta span { white-space: nowrap; }

.get {
  justify-self: start;
  display: inline-flex; align-items: center; gap: 10px;
  border-radius: 10px;
  padding: 11px 20px;
  background: linear-gradient(180deg, #2f4c8a, #1f3566);
  color: #fff !important;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 6px 16px rgba(27, 36, 64, 0.25);
  max-width: 100%;
}
.get:hover { background: linear-gradient(180deg, #3a5ba0, #24407a); }
.get .file { font-weight: 400; opacity: 0.85; font-size: 14px; overflow-wrap: anywhere; }

.changes h3, .help h3 { font-size: 15px; }
.changes ul, .help ol { margin: 0; padding-left: 1.2em; display: grid; gap: 4px; font-size: 15px; }
.help { border-top: 1px solid #d9dfec; padding-top: 12px; }
.help p { font-size: 15px; color: var(--pearl-muted); }
.help ol + p { margin-top: 8px; }

details.checksum { font-size: 13px; color: var(--pearl-muted); }
details.checksum summary { cursor: pointer; width: fit-content; }
details.checksum code { display: block; margin-top: 6px; overflow-wrap: anywhere; font-size: 12px; }

.soon {
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  color: var(--muted);
}
.soon strong { color: var(--chrome); font-weight: 500; }

.state { color: var(--muted); }
.state.fault { color: var(--fault); }

/* ---- the reset form ------------------------------------------------------------------------- */
form.reset { display: grid; gap: 16px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: 15px; }
.field .help-text { font-size: 14px; color: var(--pearl-muted); }
.field input {
  font: 400 17px/1.4 var(--body);
  padding: 11px 12px;
  border: 1px solid #b6c0d8;
  border-radius: 8px;
  background: #fff;
  color: var(--pearl-ink);
  width: 100%;
}
.field input[aria-invalid="true"] { border-color: var(--fault-ink); }
.show { display: flex; align-items: center; gap: 8px; font-size: 15px; }
.show input { width: 18px; height: 18px; }

button.submit {
  justify-self: start;
  font: 600 16px/1 var(--body);
  border: 0;
  border-radius: 10px;
  padding: 13px 22px;
  background: linear-gradient(180deg, #2f4c8a, #1f3566);
  color: #fff;
  cursor: pointer;
}
button.submit[disabled] { opacity: 0.6; cursor: progress; }

.message { margin: 0; font-size: 15px; }
.message.fault { color: var(--fault-ink); }
.message.ok { color: #186a3b; }

.done { display: grid; gap: 10px; }
.done h2 { color: #186a3b; }

/* ---- long text: terms ------------------------------------------------------------------------- */
.prose { display: grid; gap: 28px; }
.prose section { display: grid; gap: 8px; }
.prose p { color: var(--chrome); max-width: 68ch; }
.prose .quiet { color: var(--muted); }
.prose .part { gap: 28px; border-top: 1px solid var(--line); padding-top: 24px; }
.prose .part > h2 { font-size: 14px; margin: 0; }
.prose ol { margin: 0; padding-left: 1.4em; display: grid; gap: 2px; }
.prose li { max-width: 68ch; }
.toc { display: grid; gap: 8px; }
.toc .toc-part { color: var(--muted); font-size: 15px; }
.toc ol + .toc-part { margin-top: 6px; }

.placeholder { color: var(--muted); font-style: italic; }

footer.site {
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
footer.site p { margin: 0; max-width: 70ch; }
footer.site nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }

@media (max-width: 420px) {
  main { padding-block: 36px 32px; gap: 32px; }
  .card-inner { padding: 22px 16px 14px; }
  .play span.face { padding: 14px 24px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .card, .play { animation: none; }
  .play { transition: none; }
}