:root {
  --bg: #0b0d0e;
  --surface: #121517;
  --border: #23282b;
  --text: #f2f4f3;
  --muted: #9aa3a0;
  --faint: #6b7471;
  --signal: #34d399;
  --signal-ink: #04140d;
  --warn: #f5b454;
  --bad: #f87171;
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Inter, Roboto, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--signal); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--surface); color: var(--text); padding: 8px 12px; border-radius: 8px; z-index: 10; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* Nav */
.nav { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.brand { color: var(--text); text-decoration: none; font-weight: 650; letter-spacing: -0.01em; display: flex; gap: 10px; align-items: center; }
.brand-mark { width: 22px; height: 22px; border-radius: 6px; background: var(--signal); display: inline-block; }
.nav ul { list-style: none; display: flex; gap: 26px; margin: 0; padding: 0; }
.nav ul a { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav ul a:hover { color: var(--text); }
@media (max-width: 720px) { .nav ul li:not(:last-child) { display: none; } }

/* Hero */
.hero { position: relative; padding: 88px 24px 72px; }
.hero::before {
  content: '';
  position: absolute;
  inset: -120px 0 auto 0;
  height: 520px;
  background: radial-gradient(600px 300px at 30% 40%, rgba(52, 211, 153, 0.10), transparent 70%);
  pointer-events: none;
}
.eyebrow { color: var(--signal); font-size: 14px; font-weight: 600; margin: 0 0 18px; }
h1 {
  font-size: clamp(40px, 6.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  margin: 0 0 22px;
  max-width: 15ch;
}
.lede { color: var(--muted); font-size: clamp(17px, 1.6vw, 20px); max-width: 58ch; margin: 0 0 32px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 20px; border-radius: 10px;
  font: 600 15px var(--font); text-decoration: none; cursor: pointer;
  border: 1px solid var(--border); background: transparent; color: var(--text);
}
.btn:hover { border-color: #3a4245; }
.btn-primary { background: var(--signal); color: var(--signal-ink); border-color: var(--signal); }
.btn-primary:hover { filter: brightness(1.06); border-color: var(--signal); }
.btn[disabled] { opacity: 0.6; cursor: progress; }

/* Sections */
section { padding: 72px 0; border-top: 1px solid var(--border); }
h2 { font-size: clamp(28px, 3.6vw, 40px); letter-spacing: -0.025em; line-height: 1.1; margin: 0 0 12px; }
.sub { color: var(--muted); max-width: 62ch; margin: 0 0 36px; }

.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 17px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--signal); border: 1px solid rgba(52, 211, 153, 0.35); border-radius: 999px; padding: 2px 10px; margin-bottom: 12px; }
.tag-soon { color: var(--faint); border-color: var(--border); }

/* Demo */
.demo { display: grid; grid-template-columns: 340px 1fr; gap: 16px; }
@media (max-width: 860px) { .demo { grid-template-columns: 1fr; } }
.places { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.chip { height: 36px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--border); background: transparent; color: var(--text); font: 500 14px var(--font); cursor: pointer; }
.chip[aria-pressed='true'] { border-color: var(--signal); color: var(--signal); }
label { display: block; font-size: 13px; color: var(--muted); margin: 0 0 6px; }
input, select {
  width: 100%; height: 44px; padding: 0 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text); font: 15px var(--font);
}
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.result-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.big { font-size: 56px; font-weight: 700; letter-spacing: -0.04em; line-height: 1; }
.grade { font-size: 15px; color: var(--muted); }
.bars { display: grid; gap: 12px; }
.bar-row { display: grid; grid-template-columns: 150px 1fr 44px; gap: 12px; align-items: center; font-size: 14px; }
.bar { height: 8px; background: var(--bg); border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--signal); border-radius: 999px; }
.bar > span.mid { background: var(--warn); }
.bar > span.high { background: var(--bad); }
.num { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }
.note { color: var(--faint); font-size: 13px; margin-top: 16px; }
.status { color: var(--muted); font-size: 14px; min-height: 22px; }
.status.error { color: var(--bad); }

/* Code */
pre {
  margin: 0; overflow-x: auto; background: var(--bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px; font: 13.5px/1.6 var(--mono); color: #cfd6d3;
}
code { font-family: var(--mono); font-size: 0.92em; }
.k { color: var(--signal); }

/* Pricing */
.price { font-size: 36px; font-weight: 700; letter-spacing: -0.03em; margin: 8px 0 2px; }
.price small { font-size: 15px; color: var(--muted); font-weight: 500; letter-spacing: 0; }
.card ul { margin: 14px 0 20px; padding-left: 18px; color: var(--muted); font-size: 15px; }
.card.featured { border-color: rgba(52, 211, 153, 0.5); }
.card .btn { width: 100%; }

/* Signup */
.signup { display: flex; gap: 10px; max-width: 520px; }
.signup input { flex: 1; }
@media (max-width: 560px) { .signup { flex-direction: column; } }
.keybox { margin-top: 16px; display: none; }
.keybox.show { display: block; }

footer { border-top: 1px solid var(--border); padding: 36px 0 56px; color: var(--faint); font-size: 14px; }
footer p { margin: 0 0 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }