/* Bytedoku product page. Dark only, like the app: "Amber Phosphor" – an old amber terminal with scanlines and glow. */
@font-face { font-family: "JetBrains Mono"; src: url("assets/fonts/JetBrainsMono-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("assets/fonts/JetBrainsMono-Medium.ttf") format("truetype"); font-weight: 500; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("assets/fonts/JetBrainsMono-Bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("assets/fonts/JetBrainsMono-ExtraBold.ttf") format("truetype"); font-weight: 800; font-display: swap; }

:root {
  --bg: #0c0b09;
  --raised: #17140f;
  --line: #3a3122;
  --line2: #6b5a3a;
  --dim: #5c4d33;
  --grid: #221d15;
  --ink: #ffc46b;
  --ink2: #c29a5c;
  --text: #f2e6d0;
  --accent: #ffb000;
  --ok: #7ee0a0;
  --bad: #ff5f56;
  --note: #8fd3ff;
  --glow: 0 0 6px rgba(255, 176, 0, .35);
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --wrap: 1120px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg) radial-gradient(110% 60% at 50% 0%, #1d170d 0%, var(--bg) 60%) no-repeat;
  color: var(--text);
  font: 16px/1.65 var(--mono);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--ink); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
h1, h2, h3 { color: var(--ink); font-weight: 800; line-height: 1.15; margin: 0; text-shadow: var(--glow); }
p { margin: 0; }
code, kbd { font-family: inherit; color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.prompt { color: var(--ink2); }
.prompt .u { color: var(--ok); }
.prompt .p { color: var(--note); }
.cursor { display: inline-block; width: .55em; height: 1.05em; margin-left: 4px; vertical-align: -.15em; background: var(--accent); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* Scanlines over everything, 1px every 3px */
.scan { position: fixed; inset: 0; z-index: 50; pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, .18) 0, rgba(0, 0, 0, .18) 1px, transparent 1px, transparent 3px); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
  .scan { display: none; }
}

/* Navigation */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(12, 11, 9, .88); border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; font-size: 18px; letter-spacing: .04em;
  text-transform: uppercase; color: var(--ink); text-shadow: var(--glow); }
.brand img { width: 32px; height: 32px; border-radius: 4px; border: 1px solid var(--line); }
.langs { display: flex; border: 1px solid var(--line2); border-radius: 4px; overflow: hidden; }
.langs a { padding: 4px 12px; font-size: 13px; font-weight: 700; text-decoration: none; color: var(--ink2); }
.langs a + a { border-left: 1px solid var(--line2); }
.langs a[aria-current="true"] { background: var(--accent); color: var(--bg); }

/* Hero */
.hero { padding: 72px 0 88px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; align-items: center; }
.eyebrow { font-size: 14px; margin-bottom: 20px; }
.hero h1 { font-size: clamp(34px, 5.4vw, 60px); letter-spacing: -.02em; }
.hero h1 em { font-style: normal; color: var(--accent); }
.lead { margin-top: 22px; font-size: 17px; color: var(--text); max-width: 34em; }
.cta { margin-top: 32px; display: flex; flex-wrap: wrap; align-items: center; gap: 12px 14px; }
.store { display: inline-flex; align-items: center; gap: 10px; height: 52px; padding: 0 18px; border-radius: 4px; text-decoration: none;
  border: 1px solid var(--line2); background: var(--raised); color: var(--ink); }
.store svg { width: 22px; height: 22px; flex: none; }
.store span { display: flex; flex-direction: column; line-height: 1.15; text-align: left; }
.store small { font-size: 11px; color: var(--ink2); }
.store b { font-size: 16px; }
.store[aria-disabled="true"] { cursor: default; }
.facts { width: 100%; margin-top: 6px; font-size: 14px; color: var(--ink2); }

/* Terminal window: box with a title sitting on the border, like the panels in the app */
.box { position: relative; border: 1px solid var(--line2); border-radius: 2px; padding: 22px 18px 16px; }
.box > .legend { position: absolute; top: -10px; left: 12px; margin: 0; padding: 0 6px; background: var(--bg); font-size: 14px;
  line-height: 18px; font-weight: 700; color: var(--ink); text-shadow: var(--glow); }
.box > .legend.right { left: auto; right: 12px; color: var(--ink2); font-weight: 500; text-shadow: none; }

/* Playable demo */
.demo { background: var(--bg); max-width: 420px; justify-self: center; width: 100%; }
.demo .status { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; color: var(--ink2); margin-bottom: 12px; }
.demo .pager b { letter-spacing: .04em; }
.pg-on { color: var(--bad); }
.pg-off { color: var(--dim); }
.grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line2); border-radius: 2px; overflow: hidden; }
.cell { position: relative; aspect-ratio: 1; padding: 0; margin: 0; border: 0; border-right: 1px solid var(--grid); border-bottom: 1px solid var(--grid);
  background: var(--bg); color: var(--text); font: 500 clamp(22px, 6vw, 30px)/1 var(--mono); cursor: pointer; }
.cell.c1 { border-right: 2px solid var(--line2); }
.cell.c3 { border-right: 0; }
.cell.r1 { border-bottom: 2px solid var(--line2); }
.cell.r3 { border-bottom: 0; }
.cell.peer { background: var(--raised); }
.cell.sel { background: var(--accent); color: var(--bg); }
.cell.given { color: var(--ink); font-weight: 800; text-shadow: var(--glow); }
.cell.sel.given { color: var(--bg); text-shadow: none; }
.cell .cage { position: absolute; inset: 4px; pointer-events: none; border: 0 dotted var(--dim); }
.cell.sel .cage { border-color: var(--bg); }
.cell .op { position: absolute; top: 5px; left: 7px; font-size: 12px; line-height: 1; font-weight: 700; color: var(--ink2); }
.cell.sel .op { color: var(--bg); }
.cell .v { position: relative; top: 4px; }
.cell.bad .v { text-decoration: underline wavy var(--bad); text-underline-offset: 4px; text-decoration-thickness: 1.5px; }
.keys { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; margin-top: 12px; }
.key { height: 44px; border: 1px solid var(--line); border-radius: 4px; background: var(--raised); color: var(--ink);
  font: 700 18px/1 var(--mono); cursor: pointer; }
.key.wide { font-size: 13px; font-weight: 500; background: transparent; border-color: var(--line2); }
.key:hover { border-color: var(--accent); }
.tests { margin-top: 18px; padding-top: 18px; }
.tests ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; font-size: 14px; }
.tests li { display: flex; gap: 8px; }
.tests li span:nth-child(2) { flex: 1; }
.tests li span:last-child { color: var(--ink2); }
.tag { font-weight: 800; white-space: pre; }
.tag.pass { color: var(--ok); }
.tag.fail { color: var(--bad); }
.tag.run { color: var(--dim); }
.err { margin-top: 6px; min-height: 1.5em; font-size: 13px; color: var(--bad); }
.overlay { position: absolute; inset: 0; z-index: 2; display: flex; flex-direction: column; justify-content: center; gap: 12px; padding: 28px 22px;
  background: rgba(12, 11, 9, .96); font-size: 14px; }
.overlay[hidden] { display: none; }
.overlay h3 { font-size: 26px; }
.overlay.bad h3 { color: var(--bad); text-shadow: none; }
.overlay.ok h3 { color: var(--ok); text-shadow: 0 0 6px rgba(126, 224, 160, .35); }
.overlay .btn { margin-top: 8px; }
.btn { display: inline-flex; align-items: center; justify-content: center; height: 48px; padding: 0 20px; border: 0; border-radius: 4px;
  background: var(--accent); color: var(--bg); font: 700 15px/1 var(--mono); cursor: pointer; text-decoration: none; }
.btn:hover { color: var(--bg); filter: brightness(1.08); }
.hint { margin-top: 12px; font-size: 13px; color: var(--ink2); }

/* Sections */
main > section { padding: 88px 0; border-top: 1px solid var(--line); }
.head { max-width: 46em; margin-bottom: 44px; }
.head .prompt { font-size: 14px; margin-bottom: 14px; }
.head h2 { font-size: clamp(26px, 3.6vw, 38px); }
.head p:last-child { margin-top: 14px; color: var(--text); }
.cols3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px 24px; }
.cols3 .box h3, .card h3 { font-size: 18px; margin-bottom: 10px; }
.cols3 .box p, .card p { color: var(--text); font-size: 15px; }
.num { color: var(--accent); }

/* Operators cheat sheet */
.ops { margin-top: 48px; }
.ops table { width: 100%; border-collapse: collapse; font-size: 15px; }
.ops th, .ops td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.ops th { color: var(--ink2); font-weight: 500; font-size: 13px; }
.ops td:first-child { color: var(--accent); font-weight: 800; font-size: 18px; width: 3.5em; text-shadow: var(--glow); }
.ops td:nth-child(2) { color: var(--ink); white-space: nowrap; }
.ops tr:last-child td { border-bottom: 0; }
.scroll { overflow-x: auto; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card { border: 1px solid var(--line); border-radius: 4px; background: var(--raised); padding: 22px 20px; }
.card.wide { grid-column: span 2; }
.card .k { display: block; font-size: 13px; color: var(--ink2); margin-bottom: 12px; }
.card ul { margin: 12px 0 0; padding: 0; list-style: none; font-size: 15px; display: grid; gap: 6px; }
.card li::before { content: "> "; color: var(--note); }
.bitnote { color: var(--note); font-weight: 700; }
.log { margin-top: 14px; padding: 12px 14px; border: 1px dashed var(--line2); border-radius: 2px; font-size: 14px; line-height: 1.6; white-space: pre; overflow-x: auto; color: var(--text); }

/* Level curve */
.curve td:first-child { color: var(--ink); font-size: 15px; width: auto; text-shadow: none; font-weight: 700; white-space: nowrap; }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 820px; }
.faq details { border: 1px solid var(--line); border-radius: 4px; background: var(--raised); }
.faq summary { cursor: pointer; list-style: none; padding: 16px 18px; color: var(--ink); font-weight: 700; display: flex; gap: 10px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+"; color: var(--accent); }
.faq details[open] summary::before { content: "-"; }
.faq details p { padding: 0 18px 18px 38px; font-size: 15px; }

/* Final call to action */
.final { text-align: center; }
.final img { width: 112px; height: 112px; margin: 0 auto 28px; border-radius: 4px; border: 1px solid var(--line); }
.final h2 { font-size: clamp(26px, 3.6vw, 38px); }
.final p { margin-top: 14px; }
.final .cta { justify-content: center; }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; font-size: 13px; color: var(--ink2); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer a { color: var(--ink2); }
footer .legal { width: 100%; color: var(--dim); font-size: 12px; }

/* Text pages (privacy) */
.doc { padding: 64px 0 88px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(28px, 4vw, 40px); margin: 14px 0 24px; }
.doc h2 { font-size: 19px; margin: 36px 0 10px; }
.doc p { margin-top: 10px; }
.doc .stand { margin-top: 40px; color: var(--ink2); font-size: 14px; }

@media (max-width: 900px) {
  .hero { padding: 48px 0 64px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 48px; }
  .cols3, .features { grid-template-columns: 1fr; }
  .card.wide { grid-column: auto; }
  main > section { padding: 64px 0; }
}
@media (max-width: 480px) {
  .demo { padding: 22px 12px 14px; }
}