:root {
  --bg: #0b0f14;
  --bg-elev: #121821;
  --bg-card: #151c27;
  --line: rgba(255, 255, 255, 0.08);
  --text: #e8eef7;
  --muted: #93a0b4;
  --accent: #3d8bfd;
  --accent-2: #5eead4;
  --danger: #f87171;
  --radius: 16px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(61, 139, 253, 0.22), transparent 60%),
    radial-gradient(700px 400px at 90% 0%, rgba(94, 234, 212, 0.12), transparent 55%),
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  z-index: -1;
}

.top {
  max-width: 920px;
  margin: 0 auto;
  padding: 20px 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background:
    linear-gradient(135deg, var(--accent), #7c5cff 55%, var(--accent-2));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.12), 0 8px 24px rgba(61,139,253,0.35);
}
.top-links {
  display: flex;
  gap: 16px;
  font-size: 0.95rem;
}
.top-links a { color: var(--muted); }
.top-links a:hover { color: var(--text); text-decoration: none; }

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 36px 20px 64px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-2);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.lede {
  margin: 0 0 20px;
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.08rem;
}
.lede strong { color: var(--text); }

.pills {
  list-style: none;
  padding: 0;
  margin: 0 0 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pills li {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  font-size: 0.9rem;
  color: var(--text);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.card h2 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}
.muted { color: var(--muted); margin: 0 0 22px; }

.check {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  cursor: pointer;
  margin-bottom: 16px;
}
.check input {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  flex-shrink: 0;
}
.check span { color: var(--text); font-size: 0.98rem; }

.field { display: grid; gap: 6px; margin-bottom: 18px; }
.field .label { font-size: 0.85rem; color: var(--muted); }
.optional { opacity: 0.7; }
.field input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--text);
  font: inherit;
}
.field input:focus {
  outline: 2px solid rgba(61, 139, 253, 0.45);
  border-color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 18px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #6a5cff);
  color: white;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.06); text-decoration: none; }
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  filter: none;
}
.btn.ghost {
  width: auto;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 10px 14px;
}
.btn.secondary {
  margin-top: 8px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
}

.fine {
  margin: 10px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.result { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
.result.hidden, [hidden] { display: none !important; }
.demo-banner {
  margin-bottom: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: #fecaca;
  font-size: 0.88rem;
}
.result-label {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.code-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.code-row code {
  flex: 1;
  min-width: 220px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #0a1018;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.95rem;
  word-break: break-all;
}

.steps {
  margin: 0 0 18px;
  padding-left: 1.2rem;
  color: var(--muted);
}
.steps li { margin-bottom: 8px; }
.steps strong { color: var(--text); }

.faq {
  margin-top: 40px;
}
.faq h2 {
  margin: 0 0 16px;
  font-size: 1.2rem;
}
.faq dl {
  margin: 0;
  display: grid;
  gap: 12px;
}
.faq dl > div {
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
}
.faq dt {
  font-weight: 600;
  margin-bottom: 4px;
}
.faq dd {
  margin: 0;
  color: var(--muted);
}

footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 20px 48px;
  color: var(--muted);
  font-size: 0.9rem;
}
footer p { margin: 0 0 6px; }

@media (max-width: 560px) {
  .card { padding: 20px; }
  .top { padding-top: 16px; }
}