:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f3f1ec;
  --text: #1b1d22;
  --muted: #5d636e;
  --line: #e2dfd8;
  --accent: #d9771f;
  --accent-ink: #9a4f0c;
  --core: #1f5f8b;
  --core-bg: #e8f1f8;
  --ok: #1d7a46;
  --ok-bg: #e5f4ea;
  --bad: #b3261e;
  --bad-bg: #fbe9e7;
  --warn-bg: #fff4dc;
  --warn-line: #f0c96a;
  --shadow: 0 1px 2px rgba(20, 20, 30, .05), 0 4px 16px rgba(20, 20, 30, .04);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111317; --surface: #191c22; --surface-2: #20242b; --text: #e9e7e2; --muted: #a0a6b0;
    --line: #2d323a; --accent: #f0943f; --accent-ink: #f6b26b; --core: #8cc2ea; --core-bg: #16263a;
    --ok: #6fd39a; --ok-bg: #12291c; --bad: #ff8a80; --bad-bg: #331a18; --warn-bg: #2c2414; --warn-line: #7a5f22;
    --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111317; --surface: #191c22; --surface-2: #20242b; --text: #e9e7e2; --muted: #a0a6b0;
  --line: #2d323a; --accent: #f0943f; --accent-ink: #f6b26b; --core: #8cc2ea; --core-bg: #16263a;
  --ok: #6fd39a; --ok-bg: #12291c; --bad: #ff8a80; --bad-bg: #331a18; --warn-bg: #2c2414; --warn-line: #7a5f22;
  --shadow: none; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 64px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-x: hidden;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 6vw, 3.1rem); letter-spacing: -.025em; max-width: 18ch; }
h2 { font-size: clamp(1.45rem, 3.6vw, 1.9rem); }
h3 { font-size: 1.08rem; }
p { margin: 0 0 1em; }
a { color: var(--accent-ink); }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .86em; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: var(--surface); padding: 8px 12px; }

/* Header */
.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; gap: 16px; height: 56px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); text-decoration: none; }
.top nav { display: none; gap: 20px; margin-left: auto; }
.top nav a { color: var(--muted); text-decoration: none; font-size: .94rem; }
.top nav a:hover { color: var(--text); }
@media (min-width: 640px) { .top nav { display: flex; } }
.theme { margin-left: auto; background: none; border: 1px solid var(--line); color: var(--muted); border-radius: 8px;
  width: 36px; height: 36px; display: grid; place-items: center; cursor: pointer; }
@media (min-width: 640px) { .theme { margin-left: 8px; } }

/* Hero */
.hero { padding-top: 56px; padding-bottom: 32px; }
.eyebrow { color: var(--accent-ink); font-weight: 600; font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; }
.lead { font-size: 1.13rem; color: var(--text); max-width: 62ch; }
.lead.small { font-size: 1rem; color: var(--muted); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn { display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 10px; padding: 11px 18px;
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
:root[data-theme="dark"] .btn:not(.ghost) { color: #1a1206; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn:not(.ghost) { color: #1a1206; } }

/* Blocks */
.block { padding-top: 48px; padding-bottom: 16px; }
.block > p, .block li { max-width: 70ch; }
.two { display: grid; gap: 24px; }
@media (min-width: 800px) { .two { grid-template-columns: 1.4fr 1fr; gap: 40px; } }
.callout { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: 12px; padding: 18px 20px; box-shadow: var(--shadow); }
.callout-title { font-weight: 700; font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: .4em; }
.callout p:last-child { margin: 0; }

.cards { display: grid; gap: 16px; }
@media (min-width: 860px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); }
.card h3 { font-size: 1.25rem; margin-bottom: .2em; }
.card .q { color: var(--muted); font-style: italic; }
.card ul { padding-left: 1.1em; margin: 0; }
.card li { margin: .3em 0; }
.tag { display: inline-block; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em;
  color: var(--core); background: var(--core-bg); border-radius: 999px; padding: 2px 10px; margin-bottom: 10px; }

/* Diagram */
.diagram { margin: 32px auto 0; max-width: 520px; }
.diagram svg { width: 100%; height: auto; display: block; font-family: inherit; }
.diagram text { fill: var(--text); font-size: 11.5px; text-anchor: middle; }
.diagram .d-h { font-weight: 700; font-size: 13px; }
.diagram .d-s { fill: var(--muted); font-size: 10.5px; font-style: italic; }
.d-in rect { fill: var(--surface-2); stroke: var(--line); }
.d-box rect { fill: var(--surface); stroke: var(--line); stroke-width: 1.5; }
.d-coach rect { stroke: var(--accent); }
.d-core rect { fill: var(--core-bg); stroke: var(--core); stroke-width: 1.5; }
.d-line path { stroke: var(--muted); stroke-width: 1.4; fill: none; }
.d-dash { stroke: var(--muted); stroke-width: 1.4; stroke-dasharray: 4 4; fill: none; }
.d-plan rect { fill: none; stroke: var(--muted); stroke-width: 1.4; stroke-dasharray: 6 5; }
.diagram figcaption { color: var(--muted); font-size: .92rem; text-align: center; margin-top: 12px; }

/* Checks */
.checks { list-style: none; padding: 0; margin: 0; counter-reset: c; display: grid; gap: 14px; }
@media (min-width: 860px) { .checks { grid-template-columns: 1fr 1fr; } }
.checks li { counter-increment: c; background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 20px 14px 60px; position: relative; max-width: none; }
.checks li::before { content: counter(c); position: absolute; left: 18px; top: 16px; width: 28px; height: 28px;
  border-radius: 50%; background: var(--core-bg); color: var(--core); font-weight: 700; display: grid; place-items: center; }
.note { color: var(--muted); margin-top: 18px; }

/* Demo */
.sample-banner { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 10px; padding: 10px 14px; margin-bottom: 20px; font-size: .95rem; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin: 18px 0; box-shadow: var(--shadow); }
@media (min-width: 720px) { .panel { padding: 22px 26px; } }
.panel-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; margin-bottom: 8px; }
.panel-head h3 { margin: 0; }
.pill { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; background: var(--warn-bg);
  border: 1px solid var(--warn-line); border-radius: 999px; padding: 1px 8px; vertical-align: middle; margin-left: 6px; }
.switch { display: inline-flex; align-items: center; gap: 8px; font-size: .92rem; color: var(--muted); cursor: pointer; user-select: none; }
.switch input { width: 18px; height: 18px; accent-color: var(--accent); }
.formula { overflow-x: auto; }
.formula code { background: var(--surface-2); padding: 4px 8px; border-radius: 6px; white-space: nowrap; }
.table-wrap { overflow-x: auto; margin: 8px -4px; }
.board { width: 100%; border-collapse: collapse; font-size: .93rem; }
.board th, .board td { text-align: left; padding: 9px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.board th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
.board .n { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.board td:nth-child(2) { min-width: 9.5em; }
.board .risk { font-weight: 700; }
.board .bar { height: 5px; border-radius: 3px; background: var(--accent); margin-top: 5px; margin-left: auto; }
.board .work { display: none; font-size: .82rem; color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; line-height: 1.5; padding-top: 4px; }
.board.show-work .work { display: block; }
.fine { color: var(--muted); font-size: .88rem; margin: 12px 0 0; }

.ask { background: var(--surface-2); border-radius: 12px 12px 12px 4px; padding: 10px 14px; display: inline-block; margin-bottom: 14px; }
.ask span { color: var(--muted); font-weight: 600; margin-right: 4px; }
.answer { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; font-size: .95rem; }
.answer .sec { margin: 0 0 10px; }
.answer .sec:last-child { margin-bottom: 0; }
.answer .lbl { font-weight: 700; }
.answer ul { margin: 4px 0 0; padding-left: 1.1em; }
.answer li { margin: 4px 0; }
.answer .src { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .8em; color: var(--core); white-space: nowrap; }
.answer mark { background: transparent; color: inherit; border-radius: 4px; padding: 0 2px; transition: background .2s; }
.answer mark.ok { background: var(--ok-bg); color: var(--ok); font-weight: 700; }
.answer mark.bad { background: var(--bad-bg); color: var(--bad); font-weight: 700; outline: 1px solid var(--bad); }
.gate-bar { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; margin-top: 14px; }
.verdict { margin-top: 14px; border-radius: 10px; font-size: .93rem; }
.verdict:empty { display: none; }
.verdict.pass { background: var(--ok-bg); color: var(--ok); padding: 12px 14px; }
.verdict.block { background: var(--bad-bg); color: var(--bad); padding: 12px 14px; }
.verdict ul { margin: 6px 0 0; padding-left: 1.1em; color: var(--text); }
.verdict code { font-size: .85em; }
.sources { margin-top: 14px; }
.sources summary { cursor: pointer; color: var(--muted); font-size: .92rem; }
.sources pre { background: var(--surface-2); border-radius: 10px; padding: 12px; overflow-x: auto; font-size: .78rem; line-height: 1.5; }

.plain { padding-left: 1.1em; }
.plain li { margin: .35em 0; }
.h-ok { color: var(--ok); }
.h-todo { color: var(--muted); }
.contact { padding-bottom: 40px; }
.foot { border-top: 1px solid var(--line); padding-top: 18px; padding-bottom: 32px; color: var(--muted); font-size: .85rem; }
.star { fill: var(--accent); }
.d-head { fill: var(--muted); }

/* Tour video */
.video { margin: 18px 0 0; }
.video video { width: 100%; height: auto; display: block; border-radius: 14px; border: 1px solid var(--line); background: #111317; box-shadow: var(--shadow); }
.video figcaption { color: var(--muted); font-size: .88rem; margin-top: 8px; }

/* Screens gallery */
.gal-h { margin-top: 28px; font-size: 1.15rem; }
.gallery { display: grid; gap: 18px; }
@media (min-width: 680px) { .gallery { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .gallery { grid-template-columns: 1fr 1fr 1fr; } }
.gallery figure { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
.gallery .shot { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: #f9fafb; border-bottom: 1px solid var(--line); }
.gallery img { width: 100%; height: 100%; object-fit: cover; object-position: top left; display: block; transition: transform .25s; }
.gallery .shot:hover img { transform: scale(1.02); }
@media (prefers-reduced-motion: reduce) { .gallery img { transition: none; } }
.gallery figcaption { padding: 10px 12px 12px; font-size: .88rem; color: var(--muted); line-height: 1.45; }
.gallery figcaption b { color: var(--text); }

/* Lightbox */
#lightbox { border: 0; padding: 0; background: transparent; max-width: min(96vw, 1600px); max-height: 94vh; overflow: visible; }
#lightbox::backdrop { background: rgba(10, 12, 16, .86); }
#lightbox img { display: block; max-width: min(96vw, 1600px); max-height: 84vh; width: auto; height: auto; border-radius: 10px; }
#lightbox p { color: #e9e7e2; text-align: center; margin: 10px 0 0; font-size: .95rem; }
.lb-close { position: absolute; top: -14px; right: -6px; width: 40px; height: 40px; border-radius: 50%; border: 0; background: #fff; color: #111;
  font-size: 26px; line-height: 1; cursor: pointer; box-shadow: 0 4px 14px rgba(0,0,0,.3); }