/* Dark-first, like the app. The surfaces are lich's own: islands on a canvas a step darker than every
   surface, hairlines only as seams, state as fill. Values are the app's dark tokens (frontend/src/index.css). */
:root {
  color-scheme: dark;
  --background: oklch(0.141 0.005 285.823);
  --canvas: color-mix(in oklab, var(--background) 65%, black);
  --island: oklch(0.21 0.006 285.885);
  --raised: oklch(0.274 0.006 286.033);
  --fg: oklch(0.985 0 0);
  --muted: oklch(0.705 0.015 286.067);
  --faint: oklch(0.552 0.016 285.938);
  --seam: oklch(1 0 0 / 10%);
  --primary: oklch(0.92 0.004 286.32);
  --primary-fg: oklch(0.21 0.006 285.885);
  --pass: oklch(0.696 0.17 162.48);
  --wait: oklch(0.769 0.188 70.08);
  --del: oklch(0.704 0.191 22.216);
  --sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --col: 72rem;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --background: oklch(0.94 0.003 286.32);
    --canvas: color-mix(in oklab, var(--background) 92%, black);
    --island: oklch(0.98 0.002 286.32);
    --raised: oklch(0.9 0.004 286.32);
    --fg: oklch(0.21 0.006 285.885);
    --muted: oklch(0.505 0.016 285.938);
    --faint: oklch(0.6 0.014 286);
    --seam: oklch(0.888 0.004 286.32);
    --primary: oklch(0.21 0.006 285.885);
    --primary-fg: oklch(0.985 0 0);
    --pass: oklch(0.508 0.118 165.612);
    --wait: oklch(0.555 0.163 48.998);
    --del: oklch(0.577 0.245 27.325);
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --background: oklch(0.94 0.003 286.32);
  --canvas: color-mix(in oklab, var(--background) 92%, black);
  --island: oklch(0.98 0.002 286.32);
  --raised: oklch(0.9 0.004 286.32);
  --fg: oklch(0.21 0.006 285.885);
  --muted: oklch(0.505 0.016 285.938);
  --faint: oklch(0.6 0.014 286);
  --seam: oklch(0.888 0.004 286.32);
  --primary: oklch(0.21 0.006 285.885);
  --primary-fg: oklch(0.985 0 0);
  --pass: oklch(0.508 0.118 165.612);
  --wait: oklch(0.555 0.163 48.998);
  --del: oklch(0.577 0.245 27.325);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--fg);
  font: 400 1rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
code, kbd, pre { font-family: var(--mono); font-variant-ligatures: none; }
:focus-visible { outline: 2px solid var(--fg); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: var(--col); margin-inline: auto; padding-inline: 1.25rem; }

/* Top band: sits on the canvas, unboxed, like the app's tab bar. */
.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in oklab, var(--canvas) 86%, transparent);
  backdrop-filter: blur(10px);
}
.top .wrap { display: flex; align-items: center; gap: 1.5rem; height: 3.5rem; }
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 600; text-decoration: none; font-size: 1.05rem; }
.brand svg { width: 1.25rem; height: 1.25rem; }
.top nav { display: flex; gap: 1.25rem; margin-left: auto; font-size: .875rem; color: var(--muted); }
.top nav a { text-decoration: none; }
.top nav a:hover { color: var(--fg); }
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  height: 2.75rem; padding: 0 1.15rem; border-radius: .6rem;
  font: 500 .95rem/1 var(--sans); text-decoration: none; white-space: nowrap;
  transition: background-color .15s, color .15s;
}
.btn svg { width: 1.05rem; height: 1.05rem; }
.btn.primary { background: var(--primary); color: var(--primary-fg); }
.btn.primary:hover { background: color-mix(in oklab, var(--primary) 88%, var(--canvas)); }
.btn.ghost { color: var(--fg); }
.btn.ghost:hover { background: var(--raised); }
.btn.small { height: 2.15rem; padding: 0 .85rem; font-size: .85rem; border-radius: .5rem; }
@media (max-width: 640px) { .top nav { display: none; } .top .btn.small { margin-left: auto; } }

/* Hero */
.hero { text-align: center; padding-block: 5.5rem 3rem; }
.chip {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .3rem .8rem; border-radius: 99px; background: var(--island);
  font-size: .8rem; color: var(--muted);
}
.chip b { color: var(--fg); font-weight: 500; }
.chip i { width: .45rem; height: .45rem; border-radius: 50%; background: var(--pass); }
h1 {
  margin: 1.4rem auto 0; max-width: 15ch;
  font-size: clamp(2.6rem, 6.4vw, 5rem); line-height: 1.02; letter-spacing: -.035em; font-weight: 650;
  text-wrap: balance;
}
.lede { margin: 1.4rem auto 0; max-width: 40rem; font-size: 1.2rem; color: var(--muted); text-wrap: pretty; }
.lede b { color: var(--fg); font-weight: 500; }
.cta { display: flex; justify-content: center; flex-wrap: wrap; gap: .6rem; margin-top: 2.2rem; }
.under { margin-top: 1rem; font-size: .85rem; color: var(--faint); }
.under a { color: var(--muted); }

/* The product, framed as the window it is. */
.stage { padding-bottom: 2rem; }
.window {
  border-radius: 1rem; background: var(--island); padding: .4rem;
  box-shadow: 0 0 0 1px var(--seam), 0 40px 120px -40px oklch(0 0 0 / .75);
}
.window img, .window video { border-radius: .7rem; width: 100%; height: auto; }
.window .bar { display: flex; gap: .4rem; padding: .35rem .5rem .55rem; }
.window .bar span { width: .65rem; height: .65rem; border-radius: 50%; background: var(--raised); }

/* Tabs in the shape of the app's segmented filter ("All 50 · Ready · Drafts"). Pure CSS: radio inputs. */
.tour { padding-block: 4.5rem 2rem; }
.tour input { position: absolute; opacity: 0; pointer-events: none; }
.seg {
  display: flex; flex-wrap: wrap; justify-content: center; gap: .25rem;
  width: fit-content; max-width: 100%; margin: 0 auto 1.75rem; padding: .25rem;
  border-radius: .7rem; background: var(--island);
}
.seg label {
  padding: .45rem .95rem; border-radius: .5rem; cursor: pointer;
  font-size: .9rem; color: var(--muted); transition: background-color .15s, color .15s;
}
.seg label:hover { color: var(--fg); }
.pane { display: none; }
.pane p { margin: 1.1rem auto 0; max-width: 46rem; text-align: center; color: var(--muted); }
.pane p b { color: var(--fg); font-weight: 500; }
#t1:checked ~ .seg [for="t1"], #t2:checked ~ .seg [for="t2"], #t3:checked ~ .seg [for="t3"], #t4:checked ~ .seg [for="t4"] {
  background: var(--raised); color: var(--fg);
}
#t1:checked ~ .p1, #t2:checked ~ .p2, #t3:checked ~ .p3, #t4:checked ~ .p4 { display: block; }
#t1:focus-visible ~ .seg [for="t1"], #t2:focus-visible ~ .seg [for="t2"], #t3:focus-visible ~ .seg [for="t3"], #t4:focus-visible ~ .seg [for="t4"] {
  outline: 2px solid var(--fg); outline-offset: 2px;
}

/* Section heads */
.head { text-align: center; max-width: 44rem; margin: 0 auto 2.5rem; }
.eyebrow { font-family: var(--mono); font-size: .8rem; color: var(--faint); }
h2 { margin: .6rem 0 0; font-size: clamp(1.9rem, 3.6vw, 2.8rem); line-height: 1.1; letter-spacing: -.03em; font-weight: 650; text-wrap: balance; }
.head p { margin: 1rem 0 0; font-size: 1.1rem; color: var(--muted); text-wrap: pretty; }
section.block { padding-block: 5.5rem; }

/* Agents */
.agents { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .5rem; }
.agent {
  display: flex; align-items: center; gap: .75rem; padding: 1rem 1.1rem;
  border-radius: .8rem; background: var(--island);
}
.agent svg { width: 1.5rem; height: 1.5rem; flex: none; }
.agent b { font-weight: 500; }
.agent code { display: block; font-size: .78rem; color: var(--faint); }
.agents-note { margin: 1.25rem auto 0; text-align: center; color: var(--muted); max-width: 44rem; }
@media (max-width: 860px) { .agents { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* Bento: each card an island; a picture where the claim is something you look at. */
.bento { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: .75rem; }
.card { grid-column: span 2; display: flex; flex-direction: column; border-radius: 1rem; background: var(--island); overflow: hidden; min-width: 0; }
.card.w3 { grid-column: span 3; }
.card.w4 { grid-column: span 4; }
.card .txt { padding: 1.4rem 1.5rem 1.5rem; }
.card h3 { margin: 0; font-size: 1.15rem; letter-spacing: -.01em; font-weight: 600; }
.card p { margin: .5rem 0 0; color: var(--muted); font-size: .95rem; }
.card p code { font-size: .85em; color: var(--fg); }
.shot { position: relative; margin-top: auto; height: 15rem; overflow: hidden; border-top: 1px solid var(--seam); }
.shot img { position: absolute; max-width: none; }
.term {
  margin: 0 1.25rem 1.25rem; margin-top: auto; padding: 1rem 1.1rem; border-radius: .7rem;
  background: var(--canvas); font-size: .8rem; line-height: 1.7; overflow-x: auto; white-space: pre;
}
.term .p { color: var(--faint); }
.term .o { color: var(--muted); }
.term .g { color: var(--pass); }
@media (max-width: 900px) { .card, .card.w3, .card.w4 { grid-column: span 6; } }

/* Facts strip */
.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-radius: 1rem; background: var(--island); }
.fact { padding: 1.75rem 1.5rem; }
.fact + .fact { box-shadow: -1px 0 0 var(--seam); }
.fact b { display: block; font-size: 2.6rem; line-height: 1; letter-spacing: -.04em; font-weight: 650; font-variant-numeric: tabular-nums; }
.fact span { display: block; margin-top: .6rem; color: var(--muted); font-size: .9rem; }
@media (max-width: 760px) {
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fact:nth-child(3) { box-shadow: 0 -1px 0 var(--seam); }
  .fact:nth-child(4) { box-shadow: -1px 0 0 var(--seam), 0 -1px 0 var(--seam); }
}

/* Install */
.install { border-radius: 1.25rem; background: var(--island); padding: clamp(1.5rem, 4vw, 3rem); }
.install .head { margin-bottom: 2rem; }
.os { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; }
.os > div { border-radius: .8rem; background: var(--background); padding: 1.25rem; min-width: 0; scroll-margin-top: 5rem; }
.os h3 { margin: 0; font-size: 1rem; font-weight: 600; display: flex; align-items: baseline; gap: .5rem; }
.os h3 small { font-weight: 400; color: var(--faint); font-size: .8rem; }
.os pre {
  margin: .9rem 0 0; padding: .8rem .9rem; border-radius: .55rem; background: var(--canvas);
  font-size: .78rem; line-height: 1.6; white-space: pre-wrap; word-break: break-all; user-select: all;
}
.os p { margin: .8rem 0 0; font-size: .85rem; color: var(--muted); }
.os p code { font-size: .9em; color: var(--fg); }
@media (max-width: 900px) { .os { grid-template-columns: minmax(0, 1fr); } }

footer { padding-block: 3rem; color: var(--faint); font-size: .85rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; align-items: center; }
footer nav { display: flex; flex-wrap: wrap; gap: 1.25rem; margin-left: auto; }
footer a { text-decoration: none; }
footer a:hover { color: var(--fg); }