/* The start page. Same palette as the deck (css/tokens.css) so the two read as
   one product, but copied rather than linked: this page is unversioned and must
   not break when the deck's tokens move. Prose is set in a sans — the deck is
   all monospace because it is tables, and paragraphs in mono tire a newcomer. */
:root {
  --ground: #07080a; --panel: #0d0f13; --raised: #12151a;
  --rule: #1c2028; --rule-strong: #2a3039;
  --ink: #e6edf3; --ink-2: #a3acb7; --ink-3: #757d87;
  --pos: #3fb950; --neg: #f85149; --info: #58a6ff;
  --pos-dim: #1f3a26; --info-dim: #16304d;
  --mono: 'JetBrains Mono', 'SF Mono', ui-monospace, 'Cascadia Mono', monospace;
  --sans: 'Golos Text', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --page: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--info); }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
:focus-visible { outline: 2px solid var(--info); outline-offset: 2px; }

h1, h2 { font-family: var(--mono); font-weight: 700; letter-spacing: -0.02em; text-wrap: balance; }
h1 { font-size: clamp(28px, 4.2vw, 46px); line-height: 1.15; }
h2 { font-size: clamp(22px, 2.6vw, 30px); line-height: 1.2; }
h3 { font: 600 18px/1.35 var(--sans); }

/* ---------- top bar ---------- */
.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 24px;
  padding: 10px var(--gutter);
  background: rgba(7, 8, 10, 0.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font: 700 14px/1 var(--mono); letter-spacing: 0.12em;
  color: var(--ink); text-decoration: none;
}
.top-nav { display: flex; gap: 20px; margin-left: auto; font-size: 15px; }
html.lang-pending body { visibility: hidden; }
.langs { display: flex; flex: none; border: 1px solid var(--rule-strong); border-radius: 4px; overflow: hidden; }
.langs button { min-width: 40px; min-height: 40px; padding: 6px 8px; border: 0; background: none; color: var(--ink-3); font: 500 12px/1.2 var(--mono); cursor: pointer; }
.langs button + button { border-left: 1px solid var(--rule-strong); }
.langs button:hover { color: var(--ink); }
.langs button[aria-pressed=true] { background: var(--raised); color: var(--ink); }
.top-nav a { color: var(--ink-2); text-decoration: none; }
.top-nav a:hover { color: var(--ink); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 14px; border: 1px solid var(--rule-strong); border-radius: 4px;
  background: var(--raised); color: var(--ink);
  font: 500 14px/1.2 var(--mono); text-decoration: none; white-space: nowrap;
}
.btn:hover { border-color: var(--ink-3); }
.btn-go { background: var(--pos); border-color: var(--pos); color: #04130a; font-weight: 700; }
.btn-go:hover { background: #56d364; border-color: #56d364; }
.btn-lg { padding: 13px 20px; font-size: 15px; }

/* ---------- hero ---------- */
main { max-width: var(--page); margin: 0 auto; padding: 0 var(--gutter); }
.hero { padding: clamp(40px, 7vw, 88px) 0 clamp(40px, 6vw, 72px); }
.hero-text { max-width: 820px; }
.lead { margin-top: 20px; max-width: 62ch; font-size: clamp(17px, 1.6vw, 20px); color: var(--ink-2); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-facts {
  display: flex; flex-wrap: wrap; gap: 6px 22px; margin-top: 18px;
  font: 400 13px/1.4 var(--mono); color: var(--ink-3);
}
.hero-facts li::before { content: '✓ '; color: var(--pos); }

.shot { border: 1px solid var(--rule-strong); border-radius: 6px; overflow: hidden; background: var(--panel); }
.shot figcaption {
  padding: 10px 14px; border-top: 1px solid var(--rule);
  font-size: 14px; color: var(--ink-2);
}
/* Wider than the text column: the screenshot is a whole 1800px desk, and at
   the column's width its tables are too small to read. */
.hero-shot, .desks { width: min(1500px, 100vw - 2 * var(--gutter) - 16px); margin-left: 50%; transform: translateX(-50%); }
.hero-shot { margin-top: clamp(32px, 5vw, 56px); box-shadow: 0 30px 80px -40px rgba(63, 185, 80, 0.35); }

.zoom { cursor: zoom-in; }
/* All six pictures share one cell; only `.on` is opaque. Opacity, not
   display: a hidden-by-display image is neither fetched nor kept decoded. */
.desk-stack { display: grid; aspect-ratio: 3 / 2; }
.desk-stack img { grid-area: 1 / 1; width: 100%; opacity: 0; pointer-events: none; }
.desk-stack img.on { opacity: 1; pointer-events: auto; }
.lightbox { padding: 0; border: 1px solid var(--rule-strong); border-radius: 6px; background: var(--ground); max-width: 98vw; max-height: 96vh; overflow: auto; cursor: zoom-out; }
.lightbox::backdrop { background: rgba(0, 0, 0, 0.82); }
.lightbox img { width: min(2400px, 98vw); max-width: none; }

/* ---------- section frame ---------- */
.band { padding: clamp(44px, 6vw, 80px) 0; border-top: 1px solid var(--rule); }
.band-head { max-width: 60ch; margin-bottom: clamp(24px, 3vw, 40px); }
.band-head p { margin-top: 10px; color: var(--ink-2); }

/* ---------- who it is for ---------- */
.who { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 24px); }
.who > div { padding: 20px 22px; border: 1px solid var(--rule); border-radius: 6px; background: var(--panel); }
.who p { margin-top: 8px; font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.why { margin-top: clamp(28px, 4vw, 44px); }
.why ul { margin-top: 14px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px clamp(24px, 3vw, 48px); }
.why li { position: relative; padding-left: 22px; font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.why li::before { content: '✓'; position: absolute; left: 0; color: var(--pos); }
.why b { color: var(--ink); font-weight: 600; }

/* ---------- how it works ---------- */
.how { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.terms { display: grid; gap: 22px; }
.terms dt { font: 700 17px/1.3 var(--mono); display: flex; align-items: center; gap: 10px; }
.terms dd { margin-top: 6px; color: var(--ink-2); }

.chip {
  display: inline-flex; align-items: center; padding: 2px 7px;
  border: 1px solid var(--info-dim); border-radius: 3px; background: rgba(22, 48, 77, 0.45);
  font: 500 12px/1.4 var(--mono); color: var(--info); white-space: nowrap;
}
.chip-btn { cursor: pointer; }
.chip-btn:hover { border-color: var(--info); }
.chip-btn[aria-pressed=false] { color: var(--ink-3); border-color: var(--rule-strong); background: none; }

.demo { border: 1px solid var(--rule-strong); border-radius: 6px; background: var(--panel); padding: 14px; }
.demo-hint { min-height: 3.2em; padding: 0 2px 10px; font-size: 15px; color: var(--ink); }
.demo-note { padding: 10px 2px 0; font-size: 13px; color: var(--ink-3); }
.demo-deck { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 6fr); gap: 10px; }
.demo-deck .blk:first-child { grid-row: span 2; }

.blk { border: 1px solid var(--rule); border-radius: 4px; background: var(--ground); font: 400 13px/1.4 var(--mono); min-width: 0; }
.blk.unlinked { border-style: dashed; }
.blk-head { display: flex; align-items: center; gap: 8px; padding: 7px 9px; border-bottom: 1px solid var(--rule); }
.blk-title { color: var(--ink-3); font-size: 12px; letter-spacing: 0.06em; }
.blk-sym { color: var(--ink); font-size: 12px; margin-right: auto; }
.blk-head .chip { margin-left: auto; }
.blk-sym + .chip { margin-left: 0; }
.blk-body { padding: 6px; display: grid; gap: 2px; }
.blk-table { width: 100%; border-collapse: collapse; }
.blk-table th { padding: 6px 9px 2px; text-align: right; font-weight: 400; font-size: 11px; color: var(--ink-3); }
.blk-table td { padding: 4px 9px; text-align: right; font-variant-numeric: tabular-nums; }
.blk-table th:first-child, .blk-table td:first-child { text-align: left; }
.blk-table tbody tr:last-child td { padding-bottom: 9px; }
.pos { color: var(--pos); } .neg { color: var(--neg); } .dim { color: var(--ink-3); }

.demo-coin {
  display: grid; grid-template-columns: 1fr auto; gap: 0 8px; align-items: baseline;
  padding: 8px 9px; border: 0; border-left: 2px solid transparent; border-radius: 2px;
  background: none; color: var(--ink); font: inherit; text-align: left; cursor: pointer;
}
.demo-coin span { text-align: right; font-variant-numeric: tabular-nums; }
.demo-coin span:last-child { grid-column: 2; font-size: 12px; }
.demo-coin:hover { background: var(--raised); }
.demo-coin[aria-selected=true] { background: var(--raised); border-left-color: var(--pos); }

@keyframes flash { from { border-color: var(--info); box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.18); } to { box-shadow: 0 0 0 3px rgba(88, 166, 255, 0); } }
.blk.flash { animation: flash 0.7s ease-out; }

/* ---------- steps ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; border: 1px solid var(--rule); border-radius: 6px; }
.steps li { counter-increment: step; padding: 20px 18px 22px; border-left: 1px solid var(--rule); }
.steps li:first-child { border-left: 0; }
.steps li::before { content: counter(step); display: block; margin-bottom: 12px; font: 700 26px/1 var(--mono); color: var(--pos); }
.steps p { margin-top: 8px; font-size: 15px; color: var(--ink-2); }
kbd { padding: 1px 6px; border: 1px solid var(--rule-strong); border-radius: 3px; background: var(--raised); font: 500 12px/1.5 var(--mono); color: var(--ink); }

/* ---------- ready desks ---------- */
.desks { display: grid; grid-template-columns: minmax(200px, 240px) minmax(0, 1fr); gap: clamp(16px, 2.5vw, 32px); align-items: start; }
.desk-tabs { display: grid; gap: 2px; }
.desk-tabs button {
  display: grid; gap: 2px; padding: 12px 14px;
  border: 0; border-left: 2px solid var(--rule); background: none;
  color: var(--ink-2); font: inherit; text-align: left; cursor: pointer;
}
.desk-tabs b { font: 600 16px/1.3 var(--sans); color: var(--ink); }
.desk-tabs span { font-size: 14px; line-height: 1.4; }
.desk-tabs button:hover { background: var(--panel); }
.desk-tabs button[aria-selected=true] { border-left-color: var(--pos); background: var(--panel); }
.desk-about { display: flex; gap: 24px; align-items: flex-start; margin-top: 18px; }
.desk-about p { flex: 1; max-width: 68ch; color: var(--ink-2); }

/* ---------- what you can find out ---------- */
.answers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px clamp(24px, 3vw, 48px); }
.answers h3 { padding-bottom: 10px; border-bottom: 1px solid var(--rule-strong); }
.answers ul { margin-top: 12px; display: grid; gap: 10px; }
.answers li { font-size: 15px; line-height: 1.5; color: var(--ink-2); }
.answers b { color: var(--ink); font-weight: 600; }
.venues { margin-top: clamp(36px, 5vw, 56px); padding: 22px 24px; border: 1px solid var(--rule); border-radius: 6px; background: var(--panel); }
.venues p { margin-top: 8px; max-width: 80ch; color: var(--ink-2); }
.venues .venue-list { font: 400 14px/1.8 var(--mono); color: var(--ink); max-width: none; }

/* ---------- faq ---------- */
.faq { max-width: 780px; border-bottom: 1px solid var(--rule); }
.faq details { border-top: 1px solid var(--rule); }
.faq summary { padding: 16px 0; cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; font: 400 20px/1.2 var(--mono); color: var(--ink-3); }
.faq details[open] summary::after { content: '−'; }
.faq p { padding: 0 0 18px; max-width: 68ch; color: var(--ink-2); }

/* ---------- end + footer ---------- */
.end { padding: clamp(56px, 8vw, 104px) 0; border-top: 1px solid var(--rule); }
.end p { margin-top: 10px; color: var(--ink-2); }
.foot {
  display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: baseline;
  max-width: var(--page); margin: 0 auto; padding: 22px var(--gutter) 40px;
  border-top: 1px solid var(--rule); font: 400 13px/1.5 var(--mono); color: var(--ink-3);
}
.foot a { color: var(--ink-2); text-decoration: none; }
.foot a:hover { color: var(--ink); }
.foot-note { margin-left: auto; }

/* ---------- narrow ---------- */
@media (max-width: 980px) {
  .top-nav { display: none; }
  .langs { margin-left: auto; }
  .how, .desks { grid-template-columns: minmax(0, 1fr); }
  .desks { width: auto; margin-left: 0; transform: none; }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .steps li { border-left: 0; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 34px minmax(0, 1fr); column-gap: 8px; }
  .steps li:first-child { border-top: 0; }
  .steps li::before { grid-row: span 2; margin: 0; }
  .steps p { grid-column: 2; }
  .desk-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .answers { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .who { grid-template-columns: minmax(0, 1fr); }
  .why ul { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  /* The button that opens the product stays in the header on a phone — it is
     the one thing the header is for. To fit 360px beside three 40px language
     buttons it gets smaller, and the brand keeps only its mark. */
  .top { gap: 10px; }
  .top > .btn { padding: 8px 10px; font-size: 13px; }
  .brand span { display: none; }
  .demo-deck { grid-template-columns: minmax(0, 1fr); }
  .demo-deck .blk:first-child { grid-row: auto; }
  .desk-tabs span { display: none; }
  .desk-about { flex-direction: column; gap: 14px; }
  .answers { grid-template-columns: minmax(0, 1fr); }
  .foot-note { margin-left: 0; flex-basis: 100%; }
  .btn-lg { flex: 1 1 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .blk.flash { animation: none; }
}