/* LakeSwan Home — single dark theme.
   Layout: full-bleed bands, 1180px inner column; hero = type + live YAML→dataset demo over a flow canvas;
   platform = bento grid. Tokens below are the only source of color and type. */
:root {
  --bg: #061224;
  --bg-2: #0b1d35;
  --panel: rgb(255 255 255 / 0.04);
  --panel-solid: #0f2340;
  --line: rgb(140 190 220 / 0.14);
  --line-strong: rgb(140 190 220 / 0.28);
  --fg: #eaf2f8;
  --fg-soft: #d9e7f0;
  --muted: #93a7bb;
  --code: #9fb6c9;
  --accent: #2eb5d9;
  --accent-2: #0a9ec4;
  --accent-soft: #a8e0ef;
  --accent-deep: #066a86;
  --glow: rgb(46 181 217 / 0.35);
  --tint: rgb(46 181 217 / 0.1);
  --tint-strong: rgb(46 181 217 / 0.18);
  --ok: #34d399;
  --bad: #f87171;
  --font-display: "Outfit", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --r: 12px;
  --r-lg: 18px;
  --gutter-l: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
  color-scheme: dark;
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 { font-family: var(--font-display); margin: 0; text-wrap: balance; line-height: 1.08; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; }
code, pre, .mono { font-family: var(--font-mono); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

.wrap { max-width: 1180px; margin: 0 auto; padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.band { padding-block: 96px; position: relative; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--accent); }
.lede { color: var(--muted); font-size: 1.12rem; max-width: 60ch; line-height: 1.6; }
.grad { background: linear-gradient(92deg, #6cc9e0 0%, #2eb5d9 45%, #a8e0ef 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sec-head { display: grid; gap: 14px; margin-bottom: 44px; max-width: 760px; }
.glass { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r-lg); backdrop-filter: blur(12px); }
.fine { font-size: 13px; color: var(--muted); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; border-radius: 999px;
  background: var(--accent-2); color: var(--bg); padding: 12px 22px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; font-family: var(--font-body);
  transition: transform .15s ease, box-shadow .15s ease, background .15s; box-shadow: 0 0 0 0 var(--glow);
}
.btn:hover { background: var(--accent); transform: translateY(-1px); box-shadow: 0 8px 30px var(--glow); }
.btn:disabled { opacity: .6; cursor: progress; transform: none; box-shadow: none; }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--line-strong); box-shadow: none; }
.btn-ghost:hover { background: rgb(255 255 255 / 0.06); box-shadow: none; }

/* ---------- A. nav ---------- */
.nav { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: rgb(6 18 36 / 0.7); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 20px; letter-spacing: -0.01em; }
.brand img { height: 34px; width: auto; border-radius: 8px; background: #fff; padding: 2px; }
.brand .swan { color: var(--accent); }
.nav ul { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; font-size: 14px; font-weight: 500; color: var(--muted); }
.nav ul a:hover { color: var(--fg); }
@media (max-width: 860px) { .nav ul { display: none; } }

/* ---------- B. hero ---------- */
.hero {
  position: relative; overflow: hidden; border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse 60% 50% at 70% 10%, rgb(10 158 196 / 0.22), transparent 60%),
    radial-gradient(ellipse 50% 40% at 10% 90%, rgb(10 79 102 / 0.35), transparent 60%),
    var(--bg);
}
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; pointer-events: none; }
.hero .wrap { position: relative; display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: center; padding-block: 104px; }
.hero .stack { display: grid; gap: 24px; }
.hero .ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.pill { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line-strong); border-radius: 999px; padding: 6px 12px 6px 8px; font-size: 13px; color: var(--muted); background: rgb(255 255 255 / 0.03); width: fit-content; }
.pill b { background: var(--accent-2); color: var(--bg); border-radius: 999px; padding: 2px 8px; font-size: 11px; font-weight: 700; letter-spacing: .06em; }
.proof { display: flex; gap: 22px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.proof span { display: inline-flex; align-items: center; gap: 8px; }
.proof i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }

.demo-win {
  border-radius: var(--r-lg); border: 1px solid var(--line-strong); min-width: 0; overflow: hidden;
  background: linear-gradient(180deg, rgb(15 35 64 / 0.9), rgb(8 22 42 / 0.95));
  box-shadow: 0 30px 80px rgb(0 0 0 / 0.5), 0 0 0 1px rgb(46 181 217 / 0.08), 0 0 80px rgb(46 181 217 / 0.12);
}
.demo-win .bar { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.demo-win .bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-strong); }
.demo-win .bar .t { margin-left: 8px; font-family: var(--font-mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* Shape grid above the table: a compact take on the Studio "Shape" step, full window width. */
.demo-body { display: grid; grid-template-columns: 1fr; min-width: 0; }
.shape { --cols: 22px minmax(11ch, 18ch) 7.5ch 9ch 10ch; padding: 10px 14px 12px; font-family: var(--font-mono); font-size: 12px; line-height: 1.5; border-bottom: 1px solid var(--line); min-width: 0; overflow-x: auto; display: grid; gap: 2px; }
.shape header, .shape > div { display: grid; grid-template-columns: var(--cols); gap: 0 12px; align-items: center; padding: 3px 6px; border-radius: 6px; white-space: nowrap; color: var(--code); transition: background .3s, color .3s; }
.shape header { font-size: 10px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--line); border-radius: 0; margin-bottom: 4px; padding-bottom: 6px; }
.shape b { font-weight: 500; color: #e9f3f8; overflow: hidden; text-overflow: ellipsis; }
.shape .pk { display: inline-grid; place-items: center; width: 14px; height: 14px; border: 1px solid var(--line-strong); border-radius: 3px; font-style: normal; font-size: 10px; color: var(--accent); }
.shape .pk.yes { border-color: var(--accent); background: var(--tint-strong); }
.shape .chip { justify-self: start; font-size: 10.5px; letter-spacing: .04em; padding: 1px 6px; border-radius: 4px; background: var(--tint-strong); color: var(--accent-soft); }
.shape .chip.role { background: rgb(255 255 255 / 0.08); color: #e9f3f8; }
.shape .src, .shape .rel { grid-template-columns: auto minmax(0, 1fr); color: var(--muted); }
.shape .tag { font-size: 10px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-soft); }
.shape div.on { background: rgb(46 181 217 / 0.16); color: #fff; box-shadow: inset 3px 0 0 var(--accent); }
.dataset { padding: 16px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.dataset .name { font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.dataset .name b { color: #fff; font-weight: 500; }
.badge { font-size: 10.5px; font-weight: 700; letter-spacing: .06em; border-radius: 4px; padding: 2px 6px; background: var(--tint-strong); color: var(--accent-soft); }
.tbl { width: 100%; border-collapse: collapse; font-size: 12.5px; font-family: var(--font-mono); table-layout: fixed; }
.tbl th, .tbl td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tbl th { color: #cfe3ee; font-weight: 500; font-size: 11.5px; transition: background .3s, color .3s; }
.tbl th small { display: block; color: var(--muted); font-weight: 400; font-size: 10px; letter-spacing: .04em; }
.tbl th.on { background: rgb(46 181 217 / 0.2); color: #fff; }
.tbl td { color: var(--code); }
.tbl td.num { text-align: right; font-variant-numeric: tabular-nums; }
.metric { display: flex; align-items: center; justify-content: space-between; gap: 10px; border: 1px dashed var(--line-strong); border-radius: 8px; padding: 8px 10px; font-size: 12px; color: var(--muted); transition: border-color .3s, background .3s; }
.metric.on { border-color: var(--accent); background: var(--tint); color: #fff; }
.metric .mono { color: var(--accent-soft); }

/* ---------- C. problem ---------- */
.vs { display: grid; grid-template-columns: 1fr auto 1fr; gap: 20px; align-items: stretch; }
.vs .col { padding: 28px; border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--panel); min-width: 0; }
.vs .col.win { border-color: rgb(46 181 217 / 0.45); background: linear-gradient(180deg, rgb(46 181 217 / 0.08), rgb(46 181 217 / 0.02)); box-shadow: 0 0 60px rgb(46 181 217 / 0.08) inset; }
.vs .or { align-self: center; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-strong); display: grid; place-items: center; font: 600 12px var(--font-mono); color: var(--muted); }
.vs h3 { margin-bottom: 14px; font-size: 1.2rem; }
.vs ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; color: var(--muted); font-size: 15px; }
.vs li { display: grid; grid-template-columns: 22px 1fr; gap: 10px; }
.vs .x { color: var(--bad); font-weight: 700; }
.vs .y { color: var(--ok); font-weight: 700; }
.vs .win li { color: var(--fg-soft); }

/* ---------- D. steps ---------- */
.timeline { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; position: relative; }
.timeline::before { content: ""; position: absolute; left: 20px; right: 20px; top: 22px; height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent); opacity: .6; }
.step { display: grid; gap: 14px; position: relative; min-width: 0; }
.step .n { width: 44px; height: 44px; border-radius: 50%; background: var(--bg); border: 1px solid var(--accent); color: var(--accent); display: grid; place-items: center; font: 700 15px var(--font-display); box-shadow: 0 0 24px var(--glow); }
.step p { color: var(--muted); font-size: 15px; }
.step pre { margin: 0; font-family: var(--font-mono); font-size: 12px; color: var(--accent-soft); background: rgb(0 0 0 / 0.25); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; overflow-x: auto; }
.step pre .c { color: var(--muted); }

/* ---------- E. bento ---------- */
.bento { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); grid-auto-rows: minmax(190px, auto); gap: 16px; }
.tile { grid-column: span 2; padding: 24px; border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--panel); display: grid; gap: 10px; align-content: start; min-width: 0; position: relative; overflow: hidden; transition: transform .2s ease, border-color .2s; }
.tile:hover { transform: translateY(-3px); border-color: var(--line-strong); }
.tile.w3 { grid-column: span 3; }
.tile.w4 { grid-column: span 4; }
.tile.h2 { grid-row: span 2; }
.tile p { color: var(--muted); font-size: 14.5px; }
.tile .art { margin-top: auto; }
.schema { display: flex; gap: 14px; align-items: flex-start; flex-wrap: wrap; font-family: var(--font-mono); font-size: 12px; }
.schema .ent { border: 1px solid var(--line-strong); border-radius: 10px; background: rgb(0 0 0 / 0.25); min-width: 150px; overflow: hidden; }
.schema .ent header { padding: 6px 10px; background: rgb(46 181 217 / 0.14); color: #fff; font-weight: 500; }
.schema .ent div { padding: 4px 10px; color: var(--code); display: flex; justify-content: space-between; gap: 10px; }
.schema .ent div b { font-weight: 600; font-size: 10px; letter-spacing: .06em; color: var(--accent); }
.schema .rel { align-self: center; color: var(--accent); font-size: 12px; }
.versions { display: grid; gap: 8px; font-family: var(--font-mono); font-size: 12px; }
.versions div { display: flex; justify-content: space-between; gap: 8px; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); color: var(--code); }
.versions div.cur { border-color: var(--accent); color: #fff; background: var(--tint); }
.versions .d { color: var(--ok); }
.versions .m { color: var(--bad); }
.wb { font-family: var(--font-mono); font-size: 12px; display: grid; gap: 10px; }
.wb .ask { justify-self: end; background: var(--accent-2); color: var(--bg); padding: 8px 12px; border-radius: 12px 12px 2px 12px; font-family: var(--font-body); font-size: 13px; max-width: 90%; }
.wb pre { margin: 0; background: rgb(0 0 0 / 0.3); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; color: var(--accent-soft); overflow-x: auto; font-family: inherit; font-size: inherit; }
.wb .kw { color: #6cc9e0; font-weight: 500; }
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee .track { display: flex; gap: 10px; width: max-content; animation: scroll 22s linear infinite; }
.marquee span { font-family: var(--font-mono); font-size: 12px; border: 1px solid var(--line-strong); border-radius: 999px; padding: 6px 12px; color: #cfe3ee; white-space: nowrap; }
@keyframes scroll { to { transform: translateX(-50%); } }
.rt { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: 12.5px; }
.rt div { border: 1px solid var(--line); border-radius: 10px; padding: 10px; color: var(--muted); }
.rt b { display: block; font-weight: 600; margin-bottom: 2px; }

/* ---------- F. videos ---------- */
.videos { background: radial-gradient(ellipse 70% 60% at 50% 100%, rgb(10 158 196 / 0.18), transparent 60%), var(--bg-2); border-block: 1px solid var(--line); }
.vgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
.vcard { display: grid; gap: 12px; min-width: 0; }
.vcard video { display: block; width: 100%; aspect-ratio: 16 / 9; border-radius: var(--r-lg); border: 1px solid var(--line-strong); background: #000; object-fit: cover; transition: box-shadow .2s, transform .2s; }
.vcard video:hover { box-shadow: 0 20px 60px rgb(0 0 0 / 0.5), 0 0 60px var(--glow); }
.vcard .cap { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.vcard .cap h3 { font-size: 1.1rem; }
.vcard .cap .mono { font-size: 12px; color: var(--muted); }
.vcard p { color: var(--muted); font-size: 14.5px; }

/* ---------- G. audience ---------- */
.who-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; margin-bottom: 36px; }
.personas { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.persona { padding: 28px; border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--panel); display: grid; gap: 18px; min-width: 0; }
.persona h3 { color: #fff; font-size: 1.1rem; }
.persona ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.persona li { display: grid; grid-template-columns: 26px 1fr; gap: 12px; color: var(--fg-soft); font-size: 15.5px; }
.persona li i { width: 22px; height: 22px; border-radius: 6px; background: var(--tint-strong); color: var(--accent); display: grid; place-items: center; font-style: normal; font-size: 12px; font-weight: 700; }

/* ---------- G2. demo form ---------- */
.demo { background: radial-gradient(ellipse 50% 60% at 20% 40%, rgb(10 158 196 / 0.16), transparent 60%), var(--bg); }
.demo .wrap { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: start; }
.form { display: grid; gap: 14px; padding: 28px; }
.form label { display: grid; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--fg-soft); }
.form input, .form select, .form textarea { font: 400 15px var(--font-body); color: var(--fg); background: rgb(0 0 0 / 0.25); border: 1px solid var(--line-strong); border-radius: 10px; padding: 11px 13px; width: 100%; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgb(46 181 217 / 0.2); }
.form [aria-invalid="true"] { border-color: var(--bad); }
.form textarea { min-height: 110px; resize: vertical; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form .actions { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chips label { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line-strong); border-radius: 999px; padding: 8px 14px; font-size: 13.5px; cursor: pointer; font-weight: 500; }
.chips input { width: auto; margin: 0; accent-color: var(--accent); }
.chips label:has(input:checked) { border-color: var(--accent); background: rgb(46 181 217 / 0.12); }
.chips label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.hp { display: none; }
.status { min-height: 1.4em; font-size: 14px; }
.status.ok { color: var(--accent-soft); font-weight: 600; }
.status.err { color: var(--bad); }
.status.note { color: var(--fg-soft); }
.status a { color: var(--accent-soft); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- H. footer ---------- */
.footer { border-top: 1px solid var(--line); padding-block: 40px; color: var(--muted); font-size: 14px; }
.footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }
.footer .brand { font-size: 16px; }
.footer .tag { font-weight: 400; color: var(--muted); margin-left: 8px; }
.footer a:hover { color: var(--fg); }

/* privacy page */
.prose { max-width: 70ch; display: grid; gap: 18px; padding-block: 72px; }
.prose h1 { font-size: clamp(2rem, 4vw, 3rem); }
.prose h2 { font-size: 1.4rem; margin-top: 12px; }
.prose p, .prose li { color: var(--fg-soft); }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero .wrap { grid-template-columns: 1fr; padding-block: 64px; }
  .tile, .tile.w3, .tile.w4 { grid-column: span 3; }
}
@media (max-width: 920px) { .demo .wrap { grid-template-columns: 1fr; } }
@media (max-width: 820px) {
  .band { padding-block: 64px; }
  .vs { grid-template-columns: 1fr; }
  .vs .or { justify-self: center; }
  .timeline { grid-template-columns: 1fr; }
  .timeline::before { display: none; }
  .vgrid { grid-template-columns: 1fr; }
  .personas { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .shape { font-size: 11px; padding-inline: 10px; }
  .shape header, .shape > div { gap: 0 8px; }
  .tile, .tile.w3, .tile.w4 { grid-column: span 6; }
  .tile.h2 { grid-row: span 1; }
}
@media (max-width: 600px) { .form .row { grid-template-columns: 1fr; } }

/* ---------- motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marquee .track { animation: none; }
  .btn, .tile, .vcard video, .shape div, .tbl th, .metric { transition: none; }
}