:root{--bg:#08080c;--surface:#101019;--surface-2:#15151f;--ink:#eceef5;--muted:#9095a6;--faint:#5e6273;
  --line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.05);--accent:#7c6cff;--accent-light:#a99bff;--cyan:#22d3ee;
  --grad:linear-gradient(135deg,#a99bff,#22d3ee);
  --disp:"Space Grotesk",sans-serif;--sans:"Inter",-apple-system,system-ui,sans-serif;--mono:"JetBrains Mono",ui-monospace,monospace}
html[data-theme="light"]{--bg:#f7f8fc;--surface:#fff;--surface-2:#eef1f8;--ink:#0f1626;--muted:#586074;--faint:#98a0b2;--line:rgba(15,22,38,.10);--line-2:rgba(15,22,38,.055);--accent:#5b4fe0;--accent-light:#6f63ea;--cyan:#0fb5cf;--grad:linear-gradient(135deg,#5b4fe0,#0fb5cf)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.035) 1px,transparent 1.6px);background-size:40px 40px;mask-image:radial-gradient(ellipse 100% 80% at 50% 0%,#000 30%,transparent 80%)}
html[data-theme="light"] body::before{background-image:radial-gradient(circle at 1px 1px,rgba(15,22,38,.05) 1px,transparent 1.6px)}
.wrap{max-width:920px;margin:0 auto;padding:0 28px;position:relative;z-index:2}
a{color:inherit;text-decoration:none}
.eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-light)}
.eyebrow::before{content:"// "}
h1,h2,h3{font-family:var(--disp);font-weight:600;letter-spacing:-.02em;line-height:1.12}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
p{margin-top:14px;color:var(--muted)}
.btn{display:inline-block;font-family:var(--sans);font-weight:600;font-size:15px;padding:13px 24px;border-radius:9px;transition:.2s ease;cursor:pointer}
.btn.primary{background:var(--accent);color:#fff;box-shadow:0 10px 30px rgba(124,108,255,.32)}
.btn.primary:hover{background:#8b7cff;transform:translateY(-2px)}
html[data-theme="light"] .btn.primary:hover{background:#4a3fd0}
.btn.ghost{border:1px solid var(--line);color:var(--ink)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent-light)}
nav{position:sticky;top:0;z-index:20;background:rgba(8,8,12,.7);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-2)}
html[data-theme="light"] nav{background:rgba(255,255,255,.72)}
.nav-in{max-width:1120px;margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--disp);font-weight:600;font-size:19px}
.brand-mark{height:30px;width:auto;display:block}
.nav-cta{display:flex;gap:18px;align-items:center}
.nav-link{font-family:var(--mono);font-size:13px;color:var(--muted)}
.nav-link:hover{color:var(--ink)}
.nav-book{font-family:var(--sans);font-weight:600;font-size:13px;color:#fff;background:var(--accent);padding:9px 16px;border-radius:8px}
.mark-light{display:none}
html[data-theme="light"] .mark-dark{display:none}
html[data-theme="light"] .mark-light{display:inline-block}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;transition:.2s;padding:0;flex:none}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}
.theme-toggle svg{width:17px;height:17px}
.theme-toggle .t-sun{display:block}.theme-toggle .t-moon{display:none}
html[data-theme="light"] .theme-toggle .t-sun{display:none}html[data-theme="light"] .theme-toggle .t-moon{display:block}
@media(max-width:560px){.nav-cta .nav-link{display:none}}
.crumb{font-family:var(--mono);font-size:12px;color:var(--faint);padding:26px 0 0}
.crumb a:hover{color:var(--accent-light)}
.hero{padding:30px 0 30px}
.hero h1{font-size:clamp(34px,6vw,56px);margin:14px 0 0}
.hero .lead{font-size:19px;max-width:62ch;margin-top:20px}
section{padding:30px 0}
h2{font-size:clamp(24px,4vw,34px)}
h3{font-size:20px}
.cta-row{display:flex;gap:13px;flex-wrap:wrap;margin-top:26px}
/* pattern page */
.pattern-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:28px;align-items:start;margin-top:20px}
.pattern-vis{position:relative;background:var(--surface);border:1px solid var(--line-2);border-radius:18px;padding:18px;display:flex;justify-content:center}
.spray-svg{width:100%;height:auto;max-width:360px}
.prov-badge{position:absolute;top:14px;left:14px;font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;padding:5px 9px;border-radius:6px;border:1px solid var(--line)}
.prov-badge.real{color:#34d399;background:rgba(52,211,153,.10)}
.prov-badge.model{color:var(--cyan);background:rgba(34,211,238,.08)}
.pattern-stats h2{font-size:22px}
table.stats{width:100%;border-collapse:collapse;margin-top:16px;font-size:15px}
table.stats th{text-align:left;font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);font-weight:500;padding:9px 0;width:46%;vertical-align:top}
table.stats td{padding:9px 0;color:var(--ink);border-bottom:1px solid var(--line-2)}
table.stats tr:last-child td{border-bottom:none}
.prov{font-size:13px;color:var(--faint);margin-top:14px;line-height:1.55}
ol.steps{margin:18px 0 0;padding:0;list-style:none;counter-reset:s}
ol.steps li{position:relative;padding:14px 0 14px 46px;border-bottom:1px solid var(--line-2);color:var(--muted);font-size:15px}
ol.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:13px;width:30px;height:30px;border-radius:8px;background:var(--surface-2);color:var(--accent-light);font-family:var(--mono);font-size:14px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line-2)}
ol.steps strong{color:var(--ink);font-weight:600}
.chips,.indexlist{margin-top:16px}
.chip{display:inline-block;font-family:var(--mono);font-size:13px;padding:8px 14px;margin:0 8px 8px 0;border-radius:8px;background:var(--surface);border:1px solid var(--line-2);color:var(--muted);transition:.2s}
.chip:hover{border-color:var(--accent);color:var(--accent-light)}
/* grids */
.ggrid,.wgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin-top:18px}
.gcard,.wcard{background:var(--surface);border:1px solid var(--line-2);border-radius:14px;padding:14px;display:flex;flex-direction:column;align-items:center;gap:10px;transition:.2s}
.gcard:hover,.wcard:hover{border-color:var(--accent);transform:translateY(-3px)}
.gcard-vis,.wcard-vis{height:120px;display:flex;align-items:center;justify-content:center}
.gcard-vis .spray-svg{max-width:90px}.wcard-vis .spray-svg{max-width:74px}
.gcard-meta,.wcard-meta{text-align:center;display:flex;flex-direction:column;gap:2px}
.gcard-meta strong,.wcard-meta strong{font-family:var(--disp);font-size:15px;color:var(--ink)}
.gcard-meta span,.wcard-meta span{font-family:var(--mono);font-size:11px;color:var(--faint)}
.cls-h{font-size:18px;margin-top:30px;color:var(--muted);font-family:var(--mono);text-transform:uppercase;letter-spacing:.08em;font-weight:500}
.indexrow{font-size:14px;line-height:2;color:var(--muted)}
.indexrow strong{color:var(--ink)}
.indexrow a{color:var(--muted)}
.indexrow a:hover{color:var(--accent-light)}
footer{border-top:1px solid var(--line-2);padding:32px 0;color:var(--faint);font-size:13px;margin-top:20px}
.foot-in{max-width:1120px;margin:0 auto;padding:0 28px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;align-items:center}
.foot-brand{display:flex;align-items:center;gap:10px}
@media(max-width:680px){.pattern-grid{grid-template-columns:1fr}}