/* Kymotrace – "the instrument". Brand colours from docs/brand/BRAND.md */
:root {
  --night: #0B0A1F;
  --indigo: #15123A;
  --indigo-2: #1C1848;
  --track: #2E2A66;
  --line: rgba(233, 230, 255, .10);
  --mist: #E9E6FF;
  --mist-2: #B9B4DA;
  --mist-3: #8A84B4;
  --violet: #A78BFA;
  --violet-deep: #7C5CFF;
  --live: #FDE047;
  --c-sync: #6F6A9C; --c-desc: #FDE047; --c-id: #E9E6FF;
  --c-x: #67E8F9; --c-y: #A78BFA; --c-z: #F0ABFC; --c-t: #86EFAC; --c-end: #FCA5A5;
  --sans: "Plus Jakarta Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 14px;
  --w: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 700px at 78% -10%, rgba(124, 92, 255, .22), transparent 60%),
    radial-gradient(900px 600px at -10% 30%, rgba(167, 139, 250, .08), transparent 60%),
    var(--night);
  color: var(--mist);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
em { font-style: normal; color: var(--violet); }
code { font-family: var(--mono); font-size: .92em; }
:focus-visible { outline: 2px solid var(--live); outline-offset: 3px; border-radius: 4px; }

/* film grain for depth */
.grain {
  position: fixed; inset: -50%; z-index: 100; pointer-events: none; opacity: .045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ------------------------------------------------------------------ nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 28px;
  padding: 14px max(24px, calc((100vw - var(--w)) / 2));
  background: rgba(11, 10, 31, .72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font: 300 15px var(--sans); letter-spacing: .32em; }
.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a { text-decoration: none; font-size: 14px; color: var(--mist-2); transition: color .2s; }
.nav-links a:hover { color: var(--mist); }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.lang { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.lang button {
  font: 500 12px var(--mono); letter-spacing: .08em; color: var(--mist-3);
  background: none; border: 0; border-radius: 999px; padding: 5px 11px; cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--indigo-2); color: var(--mist); box-shadow: inset 0 0 0 1px var(--track); }

/* -------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  font: 600 15px var(--sans); padding: 13px 22px; border-radius: 999px;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-sm { padding: 9px 16px; font-size: 13.5px; }
.btn-primary { background: var(--mist); color: var(--indigo); box-shadow: 0 0 0 0 rgba(253, 224, 71, .0); }
.btn-primary::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--live); box-shadow: 0 0 10px var(--live); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(167, 139, 250, .7); }
.btn-ghost { border: 1px solid var(--track); color: var(--mist); }
.btn-ghost:hover { background: var(--indigo-2); }

/* ----------------------------------------------------------------- hero */
.hero {
  max-width: var(--w); margin: 0 auto; padding: 72px 24px 56px;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center;
  min-height: calc(100vh - 66px);
}
.eyebrow { display: flex; align-items: center; gap: 10px; font: 500 12.5px var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--mist-2); margin: 0 0 22px; }
.live-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--live); box-shadow: 0 0 12px var(--live); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
h1, h2 { font-family: var(--sans); font-weight: 700; letter-spacing: -.035em; margin: 0; }
h1 { font-size: clamp(40px, 6.2vw, 88px); line-height: 1.0; }
.lead { font-size: 19px; color: var(--mist-2); max-width: 34em; margin: 26px 0 34px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-facts { list-style: none; display: flex; gap: 38px; padding: 0; margin: 46px 0 0; border-top: 1px solid var(--line); padding-top: 22px; }
.hero-facts li { display: flex; flex-direction: column; }
.hero-facts strong { font: 700 34px/1 var(--sans); letter-spacing: -.03em; color: var(--mist); }
.hero-facts span { font: 500 12px var(--mono); color: var(--mist-3); letter-spacing: .04em; margin-top: 6px; }

.hero-instrument { position: relative; aspect-ratio: 1; }
.hero-instrument canvas { width: 100%; height: 100%; }
.readout {
  position: absolute; right: 0; bottom: 6%; display: grid; gap: 6px;
  font: 500 12px var(--mono); padding: 12px 16px; border-radius: 10px;
  background: rgba(21, 18, 58, .75); border: 1px solid var(--track); backdrop-filter: blur(6px);
}
.readout div { display: flex; justify-content: space-between; gap: 22px; }
.readout span { color: var(--mist-3); letter-spacing: .1em; }
.readout b { font-weight: 500; color: var(--mist); min-width: 7ch; text-align: right; }
#ro-value { color: var(--live); }

/* fade-in on load */
.hero-copy > * { opacity: 0; transform: translateY(14px); animation: rise .8s cubic-bezier(.2, .7, .2, 1) forwards; }
.hero-copy > *:nth-child(2) { animation-delay: .08s; }
.hero-copy > *:nth-child(3) { animation-delay: .18s; }
.hero-copy > *:nth-child(4) { animation-delay: .28s; }
.hero-copy > *:nth-child(5) { animation-delay: .38s; }
.hero-instrument { opacity: 0; animation: rise 1.2s .2s ease forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* -------------------------------------------------------------- section */
.section { max-width: var(--w); margin: 0 auto; padding: 110px 24px; position: relative; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 54px; }
.kicker { font: 500 12px var(--mono); color: var(--violet); letter-spacing: .2em; margin: 0 0 14px; }
.kicker::before { content: "§ "; color: var(--mist-3); }
h2 { font-size: clamp(32px, 3.9vw, 52px); line-height: 1.08; }
.sub { color: var(--mist-2); font-size: 18px; margin: 20px 0 0; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s cubic-bezier(.2, .7, .2, 1); }
.reveal.is-in { opacity: 1; transform: none; }

/* -------------------------------------------------------------- problem */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.compare-card { margin: 0; padding: 30px; border-radius: var(--radius); border: 1px solid var(--line); background: rgba(21, 18, 58, .45); }
.compare-card figcaption { font: 500 12px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--mist-3); margin-bottom: 18px; }
.compare-card.is-new { border-color: rgba(167, 139, 250, .45); background: linear-gradient(160deg, rgba(124, 92, 255, .16), rgba(21, 18, 58, .5)); }
.compare-card ul { margin: 22px 0 0; padding-left: 18px; color: var(--mist-2); }
.compare-card li { margin: 6px 0; }
.ticker { height: 132px; overflow: hidden; margin: 0; padding: 12px 14px; border-radius: 8px; background: #08071a; font: 13px/1.6 var(--mono); color: #7b7799; mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent); }
.mini-frame { display: flex; flex-wrap: wrap; gap: 6px; padding: 30px 0 10px; }
.b, .byte { font: 500 15px var(--mono); padding: 10px 9px; border-radius: 7px; background: #08071a; border: 1px solid var(--line); border-bottom-width: 3px; }
.b.sync, .byte.sync { border-bottom-color: var(--c-sync); }
.b.desc, .byte.desc { border-bottom-color: var(--c-desc); }
.b.id, .byte.id { border-bottom-color: var(--c-id); }
.b.y, .byte.y { border-bottom-color: var(--c-y); }
.b.end, .byte.end { border-bottom-color: var(--c-end); }
.byte.x { border-bottom-color: var(--c-x); } .byte.z { border-bottom-color: var(--c-z); } .byte.t { border-bottom-color: var(--c-t); }

/* ------------------------------------------------------------- pipeline */
.pipeline { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 64px 1fr 64px 1fr; align-items: stretch; }
.stage { position: relative; padding: 30px 26px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(21, 18, 58, .45); display: flex; flex-direction: column; }
.stage.is-accent { border-color: rgba(167, 139, 250, .5); background: linear-gradient(160deg, rgba(124, 92, 255, .18), rgba(21, 18, 58, .55)); }
.stage-n { font: 800 44px/1 var(--sans); color: var(--track); position: absolute; right: 22px; top: 18px; }
.stage h3 { font: 600 22px var(--sans); margin: 0; padding-right: 48px; }
.stage-role { font: 500 12px var(--mono); color: var(--violet); letter-spacing: .08em; margin: 6px 0 16px; padding-right: 48px; }
.stage p { color: var(--mist-2); font-size: 15.5px; margin: 0 0 18px; }
.link { margin-top: auto; font: 500 13px var(--mono); text-decoration: none; color: var(--mist); }
.link:hover { color: var(--live); }
.links { margin-top: auto; display: flex; flex-direction: column; gap: 8px; }
.install-label { font: 500 12px var(--mono) !important; color: var(--mist-3) !important; margin: 26px 0 8px; }
.code-copy .cmd { margin: 0 0 12px; }
.steps p a { color: var(--mist); }
.wire { position: relative; display: flex; align-items: center; justify-content: center; }
.wire::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: linear-gradient(90deg, var(--track), var(--violet), var(--track)); }
.wire::after { content: ""; position: absolute; top: calc(50% - 4px); width: 8px; height: 8px; border-radius: 50%; background: var(--live); box-shadow: 0 0 10px var(--live); animation: travel 2.4s linear infinite; }
.pipe-caption { margin: 26px 0 0; font: 12px var(--mono); color: var(--mist-3); letter-spacing: .04em; text-align: center; }
.pipe-caption b { font-weight: 500; color: var(--mist-2); margin: 0 6px; }
.pipe-caption .sep { margin: 0 12px; color: var(--track); }
@keyframes travel { from { left: 0; } to { left: calc(100% - 8px); } }

/* --------------------------------------------------------------- studio */
.screen { margin: 0 auto; max-width: 1040px; border-radius: 16px; overflow: hidden; border: 1px solid var(--track); box-shadow: 0 50px 120px -40px rgba(124, 92, 255, .45), 0 0 0 1px rgba(0, 0, 0, .4); background: #0d1117; }
.screen-bar { display: flex; align-items: center; gap: 7px; padding: 10px 14px; background: #121022; border-bottom: 1px solid var(--line); }
.screen-bar i { width: 11px; height: 11px; border-radius: 50%; background: var(--track); }
.screen-bar span { margin-left: 10px; font: 500 12px var(--mono); color: var(--mist-3); }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 64px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.features article { background: var(--night); padding: 28px; }
.features h3 { font: 600 17px var(--sans); margin: 0 0 8px; }
.features h3::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--violet); margin-right: 10px; vertical-align: middle; }
.features p { margin: 0; color: var(--mist-2); font-size: 15px; }
.xy-split { display: grid; grid-template-columns: 1.25fr 1fr; gap: 48px; align-items: center; margin-top: 90px; }
.xy-copy h3 { font: 700 30px/1.15 var(--sans); letter-spacing: -.03em; margin: 0 0 18px; }
.xy-copy p { color: var(--mist-2); }
.trace-section { margin-top: 56px; padding: 32px; border-left: 3px solid var(--c-x); background: rgba(21, 18, 58, .45); }
.release-tag { margin: 0 0 12px; font: 500 12px var(--mono); letter-spacing: .06em; color: var(--c-x); }
.trace-section h3 { margin: 0 0 16px; font: 700 30px/1.2 var(--sans); letter-spacing: -.03em; }
.trace-intro { max-width: 780px; color: var(--mist-2); }
.trace-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin: 28px 0 0; }
.trace-features dt { font-weight: 600; margin-bottom: 8px; }
.trace-features dd { margin: 0; font-size: 15px; color: var(--mist-2); }

/* ------------------------------------------------------------------ uses */
.use-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.use-grid li { padding: 26px; border-radius: var(--radius); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; transition: border-color .25s, transform .25s; }
.use-grid li:hover { border-color: var(--violet); transform: translateY(-3px); }
.use-grid b { font: 700 19px var(--sans); letter-spacing: -.01em; color: var(--mist); }
.use-grid span { color: var(--mist-2); font-size: 15px; }

/* -------------------------------------------------------------- protocol */
.frame-lab { padding: 34px; border-radius: 18px; border: 1px solid var(--track); background: linear-gradient(180deg, rgba(28, 24, 72, .6), rgba(11, 10, 31, .6)); }
.toggles { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.toggles label { cursor: pointer; }
.toggles input { position: absolute; opacity: 0; }
.toggles span { display: inline-block; font: 500 13px var(--mono); padding: 8px 16px; border-radius: 999px; border: 1px solid var(--track); color: var(--mist-2); transition: all .2s; }
.toggles input:checked + span { background: var(--mist); color: var(--indigo); border-color: var(--mist); }
.toggles input:focus-visible + span { outline: 2px solid var(--live); outline-offset: 2px; }
.frame { display: flex; flex-wrap: wrap; gap: 7px; min-height: 52px; }
.byte { animation: pop .35s cubic-bezier(.2, .9, .3, 1.4) both; }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(.9); } }
.frame-legend { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 22px; }
.lg { font: 500 11px var(--mono); color: var(--mist-3); letter-spacing: .08em; }
.lg::before { content: ""; display: inline-block; width: 14px; height: 3px; margin-right: 7px; vertical-align: middle; border-radius: 2px; }
.lg.sync::before { background: var(--c-sync); } .lg.desc::before { background: var(--c-desc); } .lg.id::before { background: var(--c-id); }
.lg.x::before { background: var(--c-x); } .lg.y::before { background: var(--c-y); } .lg.z::before { background: var(--c-z); }
.lg.t::before { background: var(--c-t); } .lg.end::before { background: var(--c-end); }
.frame-meta { font: 500 13.5px var(--mono); color: var(--mist-2); margin: 24px 0 0; padding-top: 18px; border-top: 1px dashed var(--track); }
.frame-meta b { color: var(--live); font-weight: 500; }

/* ------------------------------------------------------------------ code */
.code-sec { display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; align-items: center; }
.code-copy p { color: var(--mist-2); }
.code-copy h2 { margin-bottom: 22px; }
.platforms { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0 0; }
.platforms li { font: 500 12px var(--mono); padding: 6px 12px; border-radius: 999px; border: 1px solid var(--track); color: var(--mist-2); }
.code { margin: 0; padding: 28px; border-radius: var(--radius); background: #08071a; border: 1px solid var(--track); overflow-x: auto; font: 13.5px/1.75 var(--mono); color: var(--mist); box-shadow: 0 40px 90px -50px rgba(124, 92, 255, .6); }
.code .c { color: #6c6890; } .code .k { color: var(--violet); } .code .f { color: var(--c-x); } .code .n { color: var(--live); }

/* ----------------------------------------------------------------- start */
.download-note { margin: 18px 0 0; font: 500 12px/1.6 var(--mono); color: var(--mist-2); }
.download-note a { color: var(--c-x); }
.download-panel { display: grid; grid-template-columns: 1.1fr 1fr; gap: 42px; margin-bottom: 80px; padding: 36px; border: 1px solid var(--track); border-radius: var(--radius); background: var(--indigo); scroll-margin-top: 100px; }
.download-panel h2 { margin: 0 0 18px; font-size: clamp(28px, 4vw, 40px); }
.download-panel p { color: var(--mist-2); }
.download-panel .release-tag { color: var(--c-x); }
.download-panel .cta { flex-wrap: wrap; }
.download-verify { min-width: 0; padding-left: 32px; border-left: 1px solid var(--track); }
.download-verify h3 { margin: 0; font: 600 19px var(--sans); }
.download-verify p { font-size: 14px; }
.download-verify .cmd { font-size: 12px; }
.hash-label { margin: 24px 0 8px; font: 500 12px var(--mono); }
.download-hash { display: block; overflow-wrap: anywhere; font-size: 12px; color: var(--c-x); }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: s; }
.steps li { padding: 30px; border-radius: var(--radius); border: 1px solid var(--line); background: rgba(21, 18, 58, .4); display: flex; flex-direction: column; align-items: flex-start; }
.step-n { font: 800 52px/1 var(--sans); letter-spacing: -.04em; color: var(--violet); }
.steps h3 { font: 600 19px var(--sans); margin: 14px 0 8px; }
.steps p { color: var(--mist-2); font-size: 15px; margin: 0 0 18px; }
.cmd { margin: auto 0 0; width: 100%; padding: 12px 14px; border-radius: 8px; background: #08071a; border: 1px solid var(--line); font: 12.5px var(--mono); overflow-x: auto; }
.hint { margin-top: auto !important; font: 500 12.5px var(--mono) !important; color: var(--live) !important; }

/* --------------------------------------------------------------- license */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 900px; }
.plan { padding: 34px; border-radius: 18px; border: 1px solid var(--line); background: rgba(21, 18, 58, .4); display: flex; flex-direction: column; align-items: flex-start; }
.plan.is-accent { border-color: rgba(253, 224, 71, .35); background: linear-gradient(160deg, rgba(253, 224, 71, .06), rgba(21, 18, 58, .5)); }
.plan-tag { font: 500 12px var(--mono); color: var(--mist-3); letter-spacing: .08em; margin: 0; }
.plan h3 { font: 700 32px/1.1 var(--sans); letter-spacing: -.03em; margin: 10px 0 0; }
.price { font: 600 16px var(--sans); color: var(--violet); margin: 4px 0 18px; }
.plan.is-accent .price { color: var(--live); }
.plan ul { padding-left: 18px; color: var(--mist-2); margin: 0 0 26px; }
.plan li { margin: 6px 0; }
.plan .btn { margin-top: auto; }
.plan-note { max-width: 900px; margin: 22px 0 0; font-size: 13.5px; color: var(--mist-3); }

/* ---------------------------------------------------------------- footer */
.footer { border-top: 1px solid var(--line); padding: 56px max(24px, calc((100vw - var(--w)) / 2)); display: grid; grid-template-columns: auto 1fr; gap: 20px 40px; align-items: center; }
.footer nav { display: flex; gap: 22px; justify-content: flex-end; flex-wrap: wrap; }
.footer nav a { text-decoration: none; color: var(--mist-2); font-size: 14px; }
.footer nav a:hover { color: var(--mist); }
.footer p { grid-column: 1 / -1; font: 12px var(--mono); color: var(--mist-3); margin: 0; }

/* ------------------------------------------------------------ responsive */
@media (max-width: 980px) {
  .nav-links { display: none; }
  .nav-actions { margin-left: auto; }
  .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 48px; }
  .hero-instrument { max-width: 520px; width: 100%; justify-self: center; }
  .compare, .code-sec, .xy-split, .plans, .download-panel, .trace-features { grid-template-columns: 1fr; }
  .download-panel { padding: 24px; gap: 28px; }
  .download-verify { padding: 24px 0 0; border-left: 0; border-top: 1px solid var(--track); }
  .trace-section { padding: 24px; }
  .pipeline { grid-template-columns: 1fr; gap: 0; }
  .wire { height: 70px; }
  .wire::before { left: 50%; right: auto; top: 0; bottom: 0; width: 1px; height: auto; background: linear-gradient(180deg, var(--track), var(--violet), var(--track)); }
  .wire::after { left: calc(50% - 4px); animation-name: travel-v; }
  @keyframes travel-v { from { top: 0; } to { top: calc(100% - 8px); } }
  .features, .use-grid, .steps { grid-template-columns: 1fr; }
  .section { padding: 80px 20px; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .hero-facts { gap: 22px; }
  .hero-facts strong { font-size: 30px; }
  .footer { grid-template-columns: 1fr; }
  .footer nav { justify-content: flex-start; }
  .nav .btn-ghost { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001s !important; animation-iteration-count: 1 !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------------------------------------------------------- legal pages */
html[data-lang="de"] body [lang="en"], html[data-lang="en"] body [lang="de"] { display: none !important; }
.legal { max-width: 780px; margin: 0 auto; padding: 64px 24px 96px; }
.legal h1 { font-size: clamp(36px, 5vw, 56px); margin-bottom: 8px; }
.legal h2 { font: 600 19px var(--sans); letter-spacing: 0; margin: 40px 0 10px; color: var(--mist); }
.legal p, .legal li { color: var(--mist-2); }
.legal a { color: var(--violet); }
.legal code { color: var(--mist); }
.legal .note { font: 500 12.5px var(--mono); color: var(--mist-3); }
.legal .back { display: inline-block; margin-bottom: 36px; font: 500 13px var(--mono); color: var(--mist-2); text-decoration: none; }
.legal .back:hover { color: var(--live); }
.todo { background: rgba(253, 224, 71, .18); color: var(--live); padding: 0 6px; border-radius: 4px; font-family: var(--mono); font-size: .9em; }