:root {
  --bg: #020617;
  --bg-2: #0b1220;
  --card: #0f172a;
  --border: #1e293b;
  --border-2: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --dim: #64748b;
  --sky: #38bdf8;
  --blue: #2563eb;
  --blue-h: #1d4ed8;
  --emerald: #34d399;
  --emerald-bg: rgba(16, 185, 129, 0.1);
  --red: #f87171;
  --red-bg: rgba(248, 113, 113, 0.08);
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.mono { font-family: var(--mono); }
.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 20px; }
section { padding: 88px 0; }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--sky); margin-bottom: 14px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; color: #f8fafc; }
h2 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 14px; }
.lead { color: var(--muted); font-size: 18px; max-width: 680px; }
.section-head { margin-bottom: 48px; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(2, 6, 23, .85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; letter-spacing: -.02em; color: #fff; }
.brand .num { color: var(--sky); }
.badge {
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em;
  padding: 3px 8px; border: 1px solid var(--border-2); border-radius: 999px; color: var(--muted);
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a.link { font-size: 14px; color: var(--muted); transition: color .15s; }
.nav-links a.link:hover { color: #fff; }
.menu-btn { display: none; background: none; border: 1px solid var(--border-2); color: var(--text); border-radius: 8px; padding: 8px 10px; cursor: pointer; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--blue); color: #fff; font-weight: 600; font-size: 14px;
  padding: 10px 18px; border-radius: 8px; border: 0; cursor: pointer;
  transition: background .15s, transform .15s; font-family: var(--sans);
}
.btn:hover { background: var(--blue-h); }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn.lg { padding: 13px 22px; font-size: 15px; }
.btn.ghost { background: transparent; border: 1px solid var(--border-2); color: var(--text); }
.btn.ghost:hover { background: var(--card); }

/* Hero */
.hero { padding: 72px 0 80px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 300px at 80% 10%, rgba(56, 189, 248, .12), transparent 70%),
    radial-gradient(500px 300px at 10% 0%, rgba(37, 99, 235, .12), transparent 70%);
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; position: relative; }
.pill {
  display: inline-block; font-size: 13px; color: var(--sky);
  background: rgba(56, 189, 248, .08); border: 1px solid rgba(56, 189, 248, .25);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(36px, 5.4vw, 60px); margin-bottom: 20px; }
.hero h1 em { font-style: normal; color: var(--sky); }
.hero .sub { color: var(--muted); font-size: 18px; max-width: 580px; margin-bottom: 28px; }

.capture { display: flex; gap: 10px; max-width: 540px; }
.capture input {
  flex: 1; min-width: 0; background: var(--card); border: 1px solid var(--border-2);
  color: #fff; padding: 12px 14px; border-radius: 8px; font-size: 15px; font-family: var(--sans);
}
.capture input:focus, .field input:focus, .field select:focus { outline: 2px solid var(--sky); outline-offset: 1px; }
.form-note { font-size: 13px; color: var(--dim); margin-top: 10px; }
.form-msg { margin-top: 12px; font-size: 14px; }
.form-msg.err { color: var(--red); }
.success {
  display: none; max-width: 540px; padding: 16px 18px; border-radius: 10px;
  background: var(--emerald-bg); border: 1px solid rgba(52, 211, 153, .35); color: var(--emerald);
}
.success strong { display: block; color: #fff; margin-bottom: 2px; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }

.trust { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.trust span {
  font-family: var(--mono); font-size: 11px; letter-spacing: .06em;
  padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); background: var(--bg-2);
}

/* Certificate mockup */
.cert {
  background: linear-gradient(180deg, #0f172a, #0b1220);
  border: 1px solid var(--border-2); border-radius: 14px; padding: 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .5), 0 0 0 1px rgba(56, 189, 248, .06);
}
.cert-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px dashed var(--border-2); }
.cert-top .t { font-size: 12px; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); }
.verified { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; color: var(--emerald); background: var(--emerald-bg); padding: 4px 10px; border-radius: 999px; }
.cert-id { font-family: var(--mono); font-size: 26px; color: #fff; margin-bottom: 4px; letter-spacing: .02em; }
.cert-sub { font-size: 12px; color: var(--dim); margin-bottom: 18px; font-family: var(--mono); }
.rows { display: grid; gap: 0; }
.row { display: flex; justify-content: space-between; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.row:last-child { border-bottom: 0; }
.row .k { color: var(--muted); }
.row .v { font-family: var(--mono); font-size: 13px; color: var(--emerald); text-align: right; }
.hash { margin-top: 14px; background: #020617; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; font-family: var(--mono); font-size: 11.5px; color: var(--sky); word-break: break-all; }
.hash small { display: block; color: var(--dim); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 4px; }
.cert-cap { text-align: center; font-size: 12px; color: var(--dim); margin-top: 12px; }

/* Compare */
.bg-alt { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.col { border-radius: 14px; padding: 28px; border: 1px solid var(--border); background: var(--card); }
.col.bad { border-color: rgba(248, 113, 113, .25); background: linear-gradient(180deg, var(--red-bg), var(--card)); }
.col.good { border-color: rgba(52, 211, 153, .3); background: linear-gradient(180deg, var(--emerald-bg), var(--card)); }
.col h3 { font-size: 20px; margin-bottom: 4px; }
.col .tag { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 18px; display: block; }
.bad .tag { color: var(--red); }
.good .tag { color: var(--emerald); }
.col ul { list-style: none; display: grid; gap: 14px; }
.col li { display: flex; gap: 12px; color: var(--text); font-size: 15.5px; }
.col li svg { flex: none; margin-top: 4px; }
.stat-line { margin-top: 28px; padding: 18px 22px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-around; text-align: center; }
.stat-line b { display: block; font-family: var(--mono); font-size: 22px; color: var(--sky); }
.stat-line span { font-size: 13px; color: var(--muted); }

/* Workflow */
.tabs { display: inline-flex; padding: 4px; border: 1px solid var(--border-2); border-radius: 10px; background: var(--card); margin-bottom: 28px; }
.tab { background: none; border: 0; color: var(--muted); padding: 10px 20px; border-radius: 7px; font-size: 14px; font-weight: 600; cursor: pointer; font-family: var(--sans); }
.tab[aria-selected="true"] { background: var(--blue); color: #fff; }
.panel { display: none; }
.panel.active { display: block; }
.steps { display: grid; gap: 14px; counter-reset: s; }
.step { display: flex; gap: 16px; align-items: flex-start; padding: 18px 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
.step .n { flex: none; width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; font-family: var(--mono); font-size: 13px; color: var(--sky); border: 1px solid rgba(56, 189, 248, .35); background: rgba(56, 189, 248, .06); }
.step h4 { font-size: 16px; color: #fff; margin-bottom: 2px; }
.step p { color: var(--muted); font-size: 14.5px; }
.panel-intro { color: var(--muted); margin-bottom: 20px; max-width: 640px; }

/* Features */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 26px; border: 1px solid var(--border); border-radius: 14px; background: var(--card); transition: border-color .2s, transform .2s; }
.card:hover { border-color: rgba(56, 189, 248, .4); transform: translateY(-2px); }
.icon { width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center; background: rgba(56, 189, 248, .08); border: 1px solid rgba(56, 189, 248, .25); color: var(--sky); margin-bottom: 16px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; }

/* Segments */
.seg .where { font-family: var(--mono); font-size: 11.5px; color: var(--emerald); margin-bottom: 10px; display: block; letter-spacing: .04em; }

/* Standard */
.std { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.std-list { display: grid; gap: 12px; }
.std-item { display: flex; gap: 14px; padding: 16px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
.std-item code { font-family: var(--mono); color: var(--sky); font-size: 13px; min-width: 92px; padding-top: 2px; }
.std-item p { color: var(--muted); font-size: 14.5px; }

/* CTA */
.cta { padding: 96px 0; }
.cta-card {
  border: 1px solid var(--border-2); border-radius: 18px; padding: 44px;
  background: radial-gradient(500px 240px at 100% 0%, rgba(56, 189, 248, .12), transparent 70%), var(--card);
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
}
.cta-card h2 { margin-bottom: 12px; }
.checks { list-style: none; display: grid; gap: 10px; margin-top: 22px; }
.checks li { display: flex; gap: 10px; color: var(--text); font-size: 15px; }
.checks svg { flex: none; color: var(--emerald); margin-top: 4px; }
.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 13px; color: var(--muted); }
.field input, .field select { width: 100%; background: var(--bg); border: 1px solid var(--border-2); color: #fff; padding: 11px 13px; border-radius: 8px; font-size: 15px; font-family: var(--sans); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cta-form .btn { width: 100%; margin-top: 4px; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 36px 0; color: var(--dim); font-size: 14px; }
.foot { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }
.foot a { color: var(--muted); }
.foot a:hover { color: #fff; }
.disclaimer { margin-top: 16px; font-size: 12px; color: var(--dim); max-width: 820px; }

@media (max-width: 900px) {
  section { padding: 64px 0; }
  .hero-grid, .compare, .std, .cta-card { grid-template-columns: 1fr; }
  .grid3 { grid-template-columns: 1fr 1fr; }
  .menu-btn { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    gap: 0; padding: 12px 20px 20px; background: var(--bg); border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-links a.link { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-links .btn { margin-top: 14px; }
  .nav .badge { display: none; }
  .cta-card { padding: 28px 22px; }
}
@media (max-width: 600px) {
  .grid3 { grid-template-columns: 1fr; }
  .capture { flex-direction: column; }
  .two { grid-template-columns: 1fr; }
  .tab { padding: 10px 14px; }
}