@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Mono:wght@400;500;600;700&display=swap');

:root{
  /* Surface / ink tokens — unified with votelab.ai palette */
  --bg:#fafafa;--bg-2:#ffffff;--bg-3:#f2f2f2;--bg-hover:#eaeaea;
  --border:#e5e7eb;--border-strong:#d9d9dd;
  --text:#171717;--text-dim:#525252;--text-muted:#6b6b75;  /* WCAG AA 5.1 on white */
  --near-black:#212121;--deep-dark:#17171c;

  /* Accent (shared with votelab: interaction orange #f97316) */
  --accent:#f97316;--accent-2:#fb923c;--accent-text:#c2410c;--success-vivid:#10b981;--warn-vivid:#eab308;--danger-vivid:#ef4444;--info-vivid:#0ea5e9;--accent-dim:#c2410c;  /* orange-700, AA 5.0 on white */
  --accent-soft:rgba(249,115,22,.10);
  --accent-surface:rgba(249,115,22,.06);
  --accent-border-soft:rgba(249,115,22,.25);

  /* Status colors (votelab emerald/crimson) */
  --success:#047857;  /* emerald-700, AA 5.4 on white */--success-bg:rgba(16,185,129,.10);
  --warn:#a16207;  /* amber-700, AA 4.9 on white */--warn-bg:rgba(202,138,4,.12);
  --danger:#b91c1c;  /* red-700, AA 6.1 on white */--danger-bg:rgba(225,50,56,.10);
  --info:#0369a1;  /* sky-700, AA 6.4 on white */--info-bg:rgba(14,165,233,.12);

  /* Depth (subtle votelab-style soft shadows) */
  --ink-06:rgba(0,0,0,.06);
  --ink-12:rgba(0,0,0,.12);
  --shadow-card:0 2px 8px rgba(0,0,0,.04);
  --shadow-card-hover:0 8px 24px rgba(0,0,0,.08);

  /* Typography — Space Grotesk + Inter + IBM Plex Mono (matches votelab) */
  --mono:'IBM Plex Mono','SF Mono','Monaco','Menlo','Courier New',monospace;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  --display:'Space Grotesk','Inter',system-ui,sans-serif;
}
html,body{background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14px;line-height:1.5}
body.app-page,html:has(body.app-page){overflow:hidden;height:100vh}
h1,h2,h3,h4{font-family:var(--display);letter-spacing:-.02em;color:var(--text);font-weight:700}
/* MathVault — shared styles */
*{box-sizing:border-box;margin:0;padding:0}


body{min-height:100vh}
a{color:var(--accent-dim);text-decoration:none;font-weight:500}
a:hover{color:var(--accent-2)}
.mono{font-family:var(--mono)}
.dim{color:var(--text-dim)}
.muted{color:var(--text-muted)}

/* Site chrome */
.site-nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);background:rgba(255,255,255,.85);border-bottom:1px solid var(--border)}
.site-nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;padding:14px 24px;gap:28px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;font-weight:800;font-size:13px;color:#fff;box-shadow:0 6px 18px rgba(249,115,22,.24)}
.brand-name{font-size:17px;letter-spacing:-.2px}
.brand-tag{font-size:10px;padding:2px 7px;background:var(--bg-3);border:1px solid var(--border-strong);border-radius:4px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px;font-weight:600}
.nav-links{display:flex;gap:2px;margin-left:auto;align-items:center}
.nav-link{padding:7px 14px;border-radius:7px;font-size:13.5px;color:var(--text-dim);transition:.15s;font-weight:500}
.nav-link:hover{background:var(--bg-3);color:var(--text)}
.nav-link.active{color:var(--text);background:var(--bg-3)}
.nav-cta{margin-left:8px;padding:8px 16px;border-radius:8px;font-size:13.5px;font-weight:600;background:linear-gradient(135deg,var(--accent),var(--accent-dim));color:#fff;border:1px solid var(--accent);box-shadow:0 8px 22px rgba(249,115,22,.24)}
.nav-cta:hover{filter:brightness(1.1);color:#fff;transform:translateY(-1px)}

.site-footer{margin-top:80px;padding:30px 24px;border-top:1px solid var(--border);text-align:center;color:var(--text-muted);font-size:12px}
.site-footer a{color:var(--text-dim)}
.site-footer .fcols{max-width:1000px;margin:0 auto 22px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;text-align:left}
.site-footer h4{font-size:12px;color:var(--text);text-transform:uppercase;letter-spacing:.6px;margin-bottom:10px;font-weight:700}
.site-footer ul{list-style:none}
.site-footer li{font-size:13px;margin-bottom:6px}

/* Layout helpers */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.container-narrow{max-width:840px;margin:0 auto;padding:0 24px}
.section{padding:60px 0}
.section-tight{padding:40px 0}

/* Hero + sections */
.hero{padding:100px 24px 80px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:800px;height:800px;background:radial-gradient(circle,rgba(249,115,22,.15),transparent 70%);pointer-events:none}
.hero h1{font-size:60px;font-weight:800;letter-spacing:-1.5px;line-height:1.05;margin-bottom:22px;color:var(--text);position:relative}
.hero .sub{font-size:20px;color:var(--text-dim);max-width:700px;margin:0 auto 36px;position:relative}
.hero-ctas{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-size:14px;font-weight:600;border:1px solid var(--border-strong);background:var(--bg-3);color:var(--text);transition:.15s;cursor:pointer}
.btn:hover{background:var(--bg-hover);border-color:var(--accent-dim);color:var(--text);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-dim));border-color:var(--accent);color:#fff;box-shadow:0 10px 26px rgba(249,115,22,.24)}
.btn.primary:hover{filter:brightness(1.15);color:#fff}
.btn.small{padding:7px 14px;font-size:12.5px}
.hero-pills{display:flex;gap:10px;justify-content:center;margin-top:30px;flex-wrap:wrap;position:relative}
.pill{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:20px;font-size:12px;color:var(--text-dim);background:var(--bg-2);border:1px solid var(--border)}
.pill .dot{width:6px;height:6px;border-radius:50%;background:var(--success)}

h2.section-title{font-size:36px;font-weight:700;letter-spacing:-.8px;text-align:center;margin-bottom:12px}
p.section-lead{text-align:center;color:var(--text-dim);font-size:17px;max-width:640px;margin:0 auto 50px}

/* Feature grid */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.features{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.features{grid-template-columns:1fr}}
.feat{padding:28px;background:var(--bg-2);border:1px solid var(--border);border-radius:16px;transition:.2s;box-shadow:var(--shadow-card)}
.feat:hover{border-color:var(--accent-dim);transform:translateY(-3px);box-shadow:var(--shadow-card-hover)}
.feat-icon{width:44px;height:44px;border-radius:11px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;margin-bottom:18px;font-size:22px;color:#fff;font-weight:700}
.feat h3{font-size:17px;font-weight:700;margin-bottom:8px;letter-spacing:-.2px}
.feat p{font-size:13.5px;color:var(--text-dim);line-height:1.65}

/* Problem section (MadLab case) */
.case{max-width:900px;margin:0 auto;padding:32px;background:var(--bg-2);border:1px solid var(--border);border-radius:14px}
.case-hd{display:flex;align-items:center;gap:12px;margin-bottom:20px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.case-tag{font-size:10px;padding:3px 9px;border-radius:4px;background:var(--danger-bg);color:var(--danger);font-weight:700;letter-spacing:.5px}
.case h3{font-size:20px;font-weight:700;letter-spacing:-.3px}
.case-sub{color:var(--text-dim);font-size:13px;margin-top:2px}
.case-timeline{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin:24px 0}
@media(max-width:700px){.case-timeline{grid-template-columns:1fr}}
.cs-step{padding:16px;background:var(--bg-3);border-radius:10px;border-left:3px solid var(--accent)}
.cs-step .v{font-family:var(--mono);font-weight:700;color:var(--accent);font-size:14px}
.cs-step .dt{font-size:11px;color:var(--text-muted);margin-top:3px}
.cs-step .n{margin-top:8px;font-size:13px}
.cs-step .m{margin-top:6px;font-size:11px;color:var(--text-dim);font-family:var(--mono)}

/* Architecture diagram */
.arch-diagram{max-width:1000px;margin:0 auto;padding:36px;background:var(--bg-2);border:1px solid var(--border);border-radius:14px;font-family:var(--mono);font-size:13px;line-height:1.9;white-space:pre;overflow-x:auto;color:var(--text-dim)}
.arch-diagram b{color:var(--text)}

/* Footer cta */
.bottom-cta{margin:80px auto;max-width:900px;padding:60px 40px;background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(139,92,246,.08));border:1px solid var(--accent-dim);border-radius:18px;text-align:center}
.bottom-cta h2{font-size:32px;font-weight:700;letter-spacing:-.6px;margin-bottom:10px}
.bottom-cta p{color:var(--text-dim);max-width:520px;margin:0 auto 24px;font-size:15px}

/* Inline code */
code{font-family:var(--mono);background:var(--bg-3);padding:2px 7px;border-radius:4px;font-size:.9em;border:1px solid var(--border)}

/* Doc pages */
.doc{max-width:820px;margin:0 auto;padding:60px 24px}
.doc h1{font-size:40px;font-weight:800;letter-spacing:-1px;margin-bottom:10px}
.doc h2{font-size:26px;font-weight:700;letter-spacing:-.4px;margin:42px 0 14px;padding-top:14px;border-top:1px solid var(--border)}
.doc h2:first-of-type{border-top:none;padding-top:0}
.doc h3{font-size:18px;font-weight:700;margin:28px 0 10px;color:var(--text)}
.doc p{color:var(--text-dim);margin-bottom:14px;font-size:15.5px;line-height:1.7}
.doc ul{margin:0 0 16px 22px}
.doc li{color:var(--text-dim);margin-bottom:6px;line-height:1.7}
.doc .lead{font-size:18px;color:var(--text-dim);margin-bottom:30px}
.doc table{width:100%;border-collapse:collapse;margin:16px 0 20px;font-size:13.5px}
.doc th{text-align:left;padding:9px 12px;background:var(--bg-3);color:var(--text);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border)}
.doc td{padding:9px 12px;border-bottom:1px solid var(--border);color:var(--text-dim);vertical-align:top}
.doc pre{background:var(--bg-3);border:1px solid var(--border);border-radius:8px;padding:14px 16px;margin:10px 0 18px;overflow-x:auto;font-size:13px;line-height:1.6;color:var(--text)}
.doc pre code{background:transparent;border:none;padding:0}
.doc .tag{display:inline-block;font-size:10px;padding:2px 7px;border-radius:4px;background:var(--bg-3);color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px;font-weight:600;margin-right:6px;vertical-align:middle}

/* Roadmap */
.roadmap-phase{padding:22px 26px;background:var(--bg-2);border:1px solid var(--border);border-radius:12px;margin-bottom:14px;display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center}
.roadmap-phase .pn{font-family:var(--mono);font-weight:700;font-size:16px;color:var(--accent);width:80px}
.roadmap-phase .body h3{font-size:17px;font-weight:700;margin-bottom:4px}
.roadmap-phase .body p{color:var(--text-dim);font-size:13px}
.roadmap-phase .dur{font-size:12px;color:var(--text-muted);font-family:var(--mono);padding:4px 10px;background:var(--bg-3);border-radius:6px}

/* Variants-style reusable shells */
.mc-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0 18px}
@media(max-width:980px){.mc-cards{grid-template-columns:1fr}}
.mc-card{padding:18px;background:var(--bg-2);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow-card)}
.mc-card h3{font-size:15px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.mc-row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--border);font-size:12.5px}
.mc-row:last-child{border-bottom:none}
.mc-row .lbl{color:var(--text-dim)}
.mc-row .v{font-family:var(--mono);font-weight:600}
.mc-row .v.ok{color:var(--success)}
.mc-row .v.bad{color:var(--danger)}
.mc-row .v.neut{color:var(--warn)}

.insight{margin:18px 0;padding:14px 16px;background:var(--bg-3);border-left:3px solid var(--accent);border-radius:0 7px 7px 0;font-size:13px;color:var(--text-dim);line-height:1.65}
.insight b{color:var(--text)}

.timeline-section{background:var(--bg-2);border:1px solid var(--border);border-radius:12px;padding:20px;margin:22px 0 24px;box-shadow:var(--shadow-card)}
.timeline-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;flex-wrap:wrap;gap:10px}
.timeline-title{font-weight:600;font-size:14px}
.timeline-legend{display:flex;gap:14px;font-size:11px;color:var(--text-dim);flex-wrap:wrap}
.lg-dot{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px;vertical-align:middle}

.variants-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:18px 0 32px}
@media(max-width:980px){.variants-grid{grid-template-columns:1fr}}
.var-card{background:var(--bg-2);border:1px solid var(--border);border-radius:12px;overflow:hidden;box-shadow:var(--shadow-card)}
.var-card.low{border-top:3px solid #22c55e}
.var-card.mid{border-top:3px solid #eab308}
.var-card.high{border-top:3px solid #ef4444}
.var-card.accent{border-top:3px solid var(--accent)}
.var-hd{padding:16px 20px;border-bottom:1px solid var(--border)}
.var-name{font-weight:700;font-size:17px;letter-spacing:-.2px;display:flex;align-items:center;gap:8px}
.var-tag{font-size:10px;padding:2px 8px;border-radius:4px;font-weight:700;letter-spacing:.5px;text-transform:uppercase}
.var-tag.low{background:rgba(34,197,94,.2);color:#22c55e}
.var-tag.mid{background:rgba(234,179,8,.2);color:#eab308}
.var-tag.high{background:rgba(239,68,68,.2);color:#ef4444}
.var-tag.accent{background:rgba(249,115,22,.14);color:var(--accent-dim)}
.var-meta{font-size:12px;color:var(--text-dim);margin-top:6px;line-height:1.55}
.var-body{padding:16px 20px}

.resource-list{list-style:none;margin:0;padding:0}
.resource-list li{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px dashed var(--border);align-items:baseline}
.resource-list li:last-child{border-bottom:none}
.resource-list a{font-family:var(--mono);font-size:12.5px}
.resource-list .meta{font-size:11px;color:var(--text-muted);text-align:right}

.doc-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}