/* ============================================================
   SLM — Shared design system v2
   Three themes: Light / Vantablack / Quantum
   Type: Space Grotesk (display) + Geist Mono (code/labels)
   Full-bleed, visually engaging, responsive (mobile/tablet/desktop)
   ============================================================ */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300..700&family=JetBrains+Mono:wght@400;600&display=swap');
:root {
  --font-sans: 'Space Grotesk', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Geist Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

/* ---------- Theme: LIGHT (default) ---------- */
:root, [data-theme="light"] {
  --background: #f6f7fb;
  --background-2: #ffffff;
  --foreground: #131b2e;
  --primary: #131b2e;
  --primary-foreground: #ffffff;
  --border: #e2e6ee;
  --muted: #eef0f7;
  --muted-foreground: #5b6476;
  --ring: #c982ff;
  --mint: #8b5cf6;
  --product: #7c3aed;
  --product-2: #06b6d4;
  --card: #ffffff;
  --card-hover-border: #8b5cf6;
  --grid-line: rgba(124,58,237,.10);
  --hero-grad:
     radial-gradient(58% 52% at 82% 12%, rgba(124,58,237,.18), transparent 68%),
     radial-gradient(46% 50% at 12% 88%, rgba(6,182,212,.14), transparent 68%),
     linear-gradient(180deg, #ffffff, #f4f1fb);
  --code-bg: #0c1222;
  --code-fg: #dbe4ff;
  --glow: rgba(124,58,237,.45);
  --shadow: 0 2px 4px rgba(19,27,46,.05), 0 14px 40px rgba(19,27,46,.08);
  --orb-1: rgba(124,58,237,.28);
  --orb-2: rgba(6,182,212,.22);
}

/* ---------- Theme: VANTABLACK ---------- */
[data-theme="vantablack"] {
  --background: #050505;
  --background-2: #0b0b0b;
  --foreground: #f5f5f3;
  --primary: #f0443e;
  --primary-foreground: #fff;
  --border: #262626;
  --muted: #101010;
  --muted-foreground: #a8a6a2;
  --ring: #f0443e;
  --mint: #f0443e;
  --product: #f25b52;
  --product-2: #e5e7eb;
  --card: #0c0c0c;
  --card-hover-border: #f25b52;
  --grid-line: rgba(255,255,255,.05);
  --hero-grad:
     radial-gradient(58% 52% at 82% 12%, rgba(240,68,62,.14), transparent 68%),
     radial-gradient(46% 50% at 12% 88%, rgba(240,68,62,.08), transparent 68%),
     linear-gradient(180deg, #050505, #0d0d0e);
  --code-bg: #0d0d0d;
  --code-fg: #f5f5f3;
  --glow: rgba(242,91,82,.5);
  --shadow: 0 2px 4px rgba(0,0,0,.5), 0 14px 40px rgba(0,0,0,.5);
  --orb-1: rgba(240,68,62,.22);
  --orb-2: rgba(229,231,235,.10);
}

/* ---------- Theme: QUANTUM ---------- */
[data-theme="quantum"] {
  --background: #06030c;
  --background-2: #0c0716;
  --foreground: #fbf9ff;
  --primary: #b76aff;
  --primary-foreground: #0a0512;
  --border: #2b1f3f;
  --muted: #110a1d;
  --muted-foreground: #b5aaca;
  --ring: #c982ff;
  --mint: #c982ff;
  --product: #b76aff;
  --product-2: #7dd3fc;
  --card: #100b1a;
  --card-hover-border: #b76aff;
  --grid-line: rgba(167,120,255,.13);
  --hero-grad:
     radial-gradient(58% 52% at 82% 10%, rgba(94,23,150,.55), transparent 70%),
     radial-gradient(46% 50% at 10% 90%, rgba(60,120,255,.20), transparent 70%),
     linear-gradient(135deg, #030108, #0c0414 55%, #140a26);
  --code-bg: #0a0612;
  --code-fg: #eee6ff;
  --glow: rgba(183,106,255,.55);
  --shadow: 0 2px 4px rgba(0,0,0,.5), 0 16px 48px rgba(160,100,255,.14);
  --orb-1: rgba(183,106,255,.30);
  --orb-2: rgba(125,211,252,.18);
}

/* ---------- Base ---------- */
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
html, body { overflow-x: clip; }
body {
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--foreground);
  line-height: 1.65;
  transition: background .35s ease, color .35s ease;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

::selection { background: var(--mint); color: #fff; }

/* ---------- Full-bleed layout ---------- */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.section { padding: 110px 0; position: relative; }
.section-tight { padding: 72px 0; }
.full-bleed { width: 100vw; margin-left: calc(50% - 50vw); }

/* ---------- Top nav ---------- */
.nav { position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--background) 78%, transparent);
  backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: -.02em; font-size: 19px; }
.brand .mark { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--product), var(--ring)); color: #fff; font-weight: 800; font-size: 15px;
  box-shadow: 0 0 18px var(--glow); }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a { font-size: 14.5px; font-weight: 500; color: var(--muted-foreground); padding: 9px 14px; border-radius: 10px; transition: color .15s, background .15s; }
.nav-links a:hover { color: var(--foreground); background: var(--muted); }
.nav-cta { margin-left: 10px; }

.theme-switch { display: flex; gap: 2px; background: var(--muted); border: 1px solid var(--border);
  border-radius: 999px; padding: 3px; margin-left: 8px; }
.theme-btn { border: 0; background: transparent; color: var(--muted-foreground); cursor: pointer;
  width: 32px; height: 28px; border-radius: 999px; display: grid; place-items: center; font-size: 14px; transition: all .15s; }
.theme-btn.active { background: var(--card); color: var(--foreground); box-shadow: 0 1px 4px rgba(0,0,0,.25); }

.burger { display: none; background: none; border: 0; color: var(--foreground); font-size: 24px; cursor: pointer; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 9px; font: inherit; font-weight: 600; font-size: 15px;
  padding: 13px 24px; border-radius: 12px; border: 1px solid var(--border); background: var(--card);
  color: var(--foreground); cursor: pointer; transition: transform .14s, box-shadow .14s, border-color .14s, background .14s; }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--card-hover-border); }
.btn-primary { background: var(--primary); color: var(--primary-foreground); border-color: transparent; }
[data-theme="quantum"] .btn-primary { background: linear-gradient(135deg, #d69bff, #9a59f7); color: #0a0512; box-shadow: 0 6px 26px rgba(160,100,255,.35); }
[data-theme="vantablack"] .btn-primary { background: linear-gradient(135deg, #f0443e, #c9302b); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 9px 16px; font-size: 13.5px; }
.btn-lg { padding: 16px 30px; font-size: 16px; }

/* ---------- Hero (full screen) ---------- */
.hero { position: relative; min-height: calc(100vh - 68px); display: flex; align-items: center;
  overflow: hidden; background: var(--hero-grad); }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
                    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 30%, #000 0%, transparent 100%);
          mask-image: radial-gradient(70% 70% at 50% 30%, #000 0%, transparent 100%); }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .8; pointer-events: none; animation: float 14s ease-in-out infinite; }
.orb-1 { width: 460px; height: 460px; background: var(--orb-1); top: -120px; right: -80px; }
.orb-2 { width: 380px; height: 380px; background: var(--orb-2); bottom: -140px; left: -60px; animation-delay: -6s; }
@keyframes float { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-24px,18px) scale(1.06); } }

.hero-inner { position: relative; z-index: 2; text-align: center; width: 100%; padding: 64px 0; }
.pill { display: inline-flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 600; letter-spacing: .04em;
  color: var(--muted-foreground); border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 72%, transparent); border-radius: 999px; padding: 8px 18px; margin-bottom: 28px; }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 12px var(--mint); animation: pulse 2.2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

.hero h1 { font-size: clamp(46px, 8vw, 92px); line-height: .98; letter-spacing: -.035em; margin: 0 0 26px; font-weight: 700; }
.hero h1 .accent { background: linear-gradient(115deg, var(--product), var(--ring) 55%, var(--product-2));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lede { font-size: clamp(17px, 2.2vw, 21px); color: var(--muted-foreground); max-width: 660px; margin: 0 auto 40px; }
.hero .actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero .evidence { margin-top: 42px; font-family: var(--font-mono); font-size: 13px; color: var(--muted-foreground);
  display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; }
.hero .evidence span { color: var(--mint); font-weight: 600; }

/* Terminal mockup under hero */
.terminal { max-width: 680px; margin: 52px auto 0; text-align: left; background: var(--code-bg);
  border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.terminal .bar { display: flex; gap: 8px; align-items: center; padding: 12px 16px; background: color-mix(in srgb, var(--code-bg) 82%, #fff 0%);
  border-bottom: 1px solid var(--border); }
.terminal .bar i { width: 12px; height: 12px; border-radius: 50%; display: block; }
.terminal .bar i:nth-child(1){background:#ff5f57}.terminal .bar i:nth-child(2){background:#febc2e}.terminal .bar i:nth-child(3){background:#28c840}
.terminal .bar span { margin-left: 10px; font-family: var(--font-mono); font-size: 12px; color: var(--muted-foreground); }
.terminal pre { padding: 20px 22px; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.85; color: var(--code-fg); overflow-x: auto; }
.terminal .c { color: #7c8798; }
.terminal .ok { color: #3ddc84; }
.terminal .acc { color: #ffd479; }

/* ---------- Section headers ---------- */
.kicker { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--mint); margin: 0 0 14px; font-weight: 600; }
h2.title { font-size: clamp(32px, 4.4vw, 52px); letter-spacing: -.03em; line-height: 1.06; margin: 0 0 18px; font-weight: 700; }
.section-head { max-width: 780px; margin-bottom: 60px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--muted-foreground); font-size: 18px; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 30px;
  transition: border-color .18s, transform .18s, box-shadow .18s; position: relative; overflow: hidden; }
.card:hover { border-color: var(--card-hover-border); transform: translateY(-4px); box-shadow: var(--shadow); }
.card .icon { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; font-size: 22px;
  background: color-mix(in srgb, var(--product) 14%, transparent); color: var(--product); margin-bottom: 18px;
  border: 1px solid color-mix(in srgb, var(--product) 25%, transparent); }
.card h3 { margin: 0 0 10px; font-size: 19px; letter-spacing: -.015em; font-weight: 650; }
.card p { margin: 0; color: var(--muted-foreground); font-size: 15.5px; }
.card .link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--mint); font-weight: 600; font-size: 14.5px; }
.feature { border-top: 3px solid var(--product); }

/* ---------- Stat counters ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; padding: 20px; }
.stat .num { font-size: clamp(40px, 5vw, 64px); font-weight: 700; letter-spacing: -.03em; line-height: 1;
  background: linear-gradient(115deg, var(--product), var(--ring)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .lbl { margin-top: 10px; color: var(--muted-foreground); font-size: 15px; }

/* ---------- Steps ---------- */
.steps { display: grid; gap: 0; }
.step { display: grid; grid-template-columns: 72px 1fr; gap: 22px; padding: 22px 0; position: relative; }
.step + .step { border-top: 1px dashed var(--border); }
.step .num { font-family: var(--font-mono); font-size: 15px; font-weight: 700; color: var(--mint);
  border: 1px solid var(--border); border-radius: 14px; width: 72px; height: 48px; display: grid; place-items: center;
  background: var(--card); box-shadow: var(--shadow); }
.step h3 { font-size: 20px; margin-bottom: 8px; font-weight: 650; letter-spacing: -.01em; }
.step p { color: var(--muted-foreground); font-size: 16px; }

/* ---------- Code ---------- */
pre.code { background: var(--code-bg); color: var(--code-fg); border-radius: 16px; padding: 24px 26px;
  overflow-x: auto; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.8; border: 1px solid var(--border); box-shadow: var(--shadow); }
pre.code .c { color: #7c8798; }
pre.code .kw { color: #c982ff; }
pre.code .s { color: #7ee0a3; }
code.inline { font-family: var(--font-mono); font-size: .88em; background: var(--muted); border: 1px solid var(--border);
  padding: 2px 7px; border-radius: 6px; }

/* ---------- Tables ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; background: var(--card); }
th, td { text-align: left; padding: 15px 18px; border-bottom: 1px solid var(--border); }
th { font-family: var(--font-mono); font-size: 12px; letter-spacing: .07em; text-transform: uppercase; color: var(--muted-foreground); }
tr:last-child td { border-bottom: 0; }
td code { font-size: 13px; }

/* ---------- Bands / callouts ---------- */
.band { background: var(--card); border: 1px solid var(--border); border-radius: 24px; padding: 64px 48px; position: relative; overflow: hidden;
  box-shadow: var(--shadow); }
.band::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 80% at 50% 0%, var(--orb-1), transparent 70%);
  pointer-events: none; }
.callout { border-left: 3px solid var(--mint); background: color-mix(in srgb, var(--mint) 7%, transparent);
  border-radius: 0 14px 14px 0; padding: 16px 20px; font-size: 15.5px; }

/* ---------- Marquee ---------- */
.marquee { overflow: hidden; max-width: 100%; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  background: var(--background-2); padding: 18px 0; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-inner { display: flex; gap: 56px; width: max-content; animation: scroll 30s linear infinite; }
.marquee span { font-family: var(--font-mono); font-size: 14px; color: var(--muted-foreground); white-space: nowrap; }
.marquee span b { color: var(--mint); font-weight: 600; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); background: var(--background-2); padding: 64px 0 40px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer h4 { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted-foreground); margin: 0 0 14px; font-family: var(--font-mono); }
.footer a { display: block; color: var(--foreground); font-size: 14.5px; padding: 5px 0; opacity: .85; transition: opacity .15s, transform .15s; }
.footer a:hover { opacity: 1; transform: translateX(2px); }
.footer .tag { font-family: var(--font-mono); font-size: 13px; color: var(--muted-foreground); margin-top: 12px; }
.footer .bottom { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--muted-foreground);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- Docs prose ---------- */
.docs-layout { display: grid; grid-template-columns: 220px 1fr; gap: 56px; align-items: start; }
.docs-toc { position: sticky; top: 96px; }
.docs-toc a { display: block; padding: 7px 0; color: var(--muted-foreground); font-size: 14.5px; font-weight: 500; }
.docs-toc a:hover { color: var(--foreground); }
.docs-toc .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-foreground); margin-top: 18px; }
.prose { max-width: 800px; }
.prose h2 { font-size: 28px; letter-spacing: -.02em; margin: 48px 0 16px; font-weight: 700; }
.prose h3 { font-size: 20px; margin: 32px 0 12px; font-weight: 650; }
.prose p, .prose li { color: var(--muted-foreground); font-size: 16.5px; }
.prose li { margin: 8px 0; }
.prose ul { padding-left: 22px; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }


/* pipeline 5-col responsive */
.grid-5-pipe { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 1024px) { .grid-5-pipe { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .grid-5-pipe { grid-template-columns: 1fr 1fr; } }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-toc { position: static; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--background);
    flex-direction: column; padding: 14px 24px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .burger { display: block; }
  .step { grid-template-columns: 56px 1fr; gap: 16px; }
  .step .num { width: 56px; height: 44px; }
  .band { padding: 40px 24px; }
  .hero { min-height: auto; }
  .terminal { margin-top: 36px; }
}