:root {
  --bg: #07090b;
  --bg-soft: #0c1014;
  --panel: #10151a;
  --line: rgba(255, 255, 255, 0.08);
  --text: #eef2f4;
  --muted: #93a0aa;
  --muted-2: #64717c;
  --accent: #5eead4;
  --accent-2: #2dd4bf;
  --danger: #ff8080;
  --radius: 16px;
  --max: 1120px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1000px 520px at 78% -12%, rgba(94, 234, 212, 0.10), transparent 62%),
    var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.1; letter-spacing: -0.025em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.2rem, 5.6vw, 4rem); font-weight: 680; }
h2 { font-size: clamp(1.65rem, 3.4vw, 2.5rem); font-weight: 650; }
h3 { font-size: 1.05rem; font-weight: 620; }
p { margin: 0 0 1em; color: var(--muted); }

.skip { position: absolute; left: -9999px; padding: 12px 16px; background: var(--accent); color: #04110c; z-index: 100; }
.skip:focus { left: 0; }

.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 26px;
  max-width: var(--max); margin: 0 auto; padding: 16px 24px;
  backdrop-filter: blur(14px);
  background: rgba(7, 9, 11, 0.74);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 0.95rem; letter-spacing: -0.01em; }
.nav nav { display: flex; gap: 22px; margin-left: auto; }
.nav nav a { color: var(--muted); font-size: 0.88rem; }
.nav nav a:hover { color: var(--text); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 20px; border-radius: 10px; border: 1px solid var(--accent);
  background: var(--accent); color: #04110c;
  font-weight: 650; font-size: 0.93rem; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(94, 234, 212, 0.18); background: #7df0dc; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { background: rgba(255,255,255,0.04); box-shadow: none; }
.btn-sm { padding: 9px 14px; font-size: 0.84rem; }
.btn-block { width: 100%; }

section { padding: 86px 24px; }
.hero, .gap, .build, .proof, .oss, .fit, .pricing, .faq, .contact { max-width: var(--max); margin: 0 auto; }

.eyebrow {
  display: inline-block; font-family: var(--mono);
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 16px;
}
.section-head { max-width: 660px; margin-bottom: 42px; }
.section-head p { font-size: 1.02rem; }

.hero { padding-top: 92px; padding-bottom: 96px; position: relative; }
.hero h1 { max-width: 960px; }
.hero h1 span { color: var(--muted-2); }
.hero .sub { max-width: 600px; font-size: 1.12rem; margin-top: 18px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 30px 0 34px; }
.stack-line { display: flex; gap: 10px; flex-wrap: wrap; }
.stack-line span {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.02em;
  color: var(--muted); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 11px; background: rgba(255,255,255,0.02);
}
.hero-glow {
  position: absolute; inset: auto -10% -50% 45%; height: 420px;
  background: radial-gradient(closest-side, rgba(45, 212, 191, 0.10), transparent);
  pointer-events: none; z-index: -1;
}

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
}
.card h3 { margin: 8px 0 10px; }
.card p { margin: 0; font-size: 0.94rem; }
.num { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; color: var(--accent-2); }

.phase-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.phase-list li { display: grid; grid-template-columns: 130px 1fr; gap: 24px; padding: 22px 4px; border-bottom: 1px solid var(--line); }
.phase-day { font-family: var(--mono); font-size: 0.76rem; color: var(--accent); padding-top: 4px; }
.phase-list h3 { margin-bottom: 6px; }
.phase-list p { margin: 0; font-size: 0.94rem; }

.proof { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.proof-copy h2 { margin-bottom: 14px; }
.proof-list { list-style: none; padding: 0; margin: 22px 0; }
.proof-list li { padding: 10px 0 10px 22px; position: relative; color: var(--muted); font-size: 0.94rem; border-bottom: 1px solid var(--line); }
.proof-list li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }
.proof-list strong { color: var(--text); font-weight: 600; }
.text-link { color: var(--accent); font-size: 0.92rem; font-weight: 600; }

.proof-diagram {
  border: 1px solid var(--line); border-radius: 20px; padding: 26px;
  background: radial-gradient(300px 200px at 50% 0%, rgba(94,234,212,0.07), transparent), var(--panel);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.node {
  width: 100%; text-align: center; padding: 9px 12px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--bg);
  font-family: var(--mono); font-size: 0.76rem; color: var(--muted);
}
.accent-node { border-color: rgba(94,234,212,0.4); color: var(--accent); background: rgba(94,234,212,0.05); }
.node.dim { color: var(--muted-2); }
.arrow { color: var(--muted-2); font-size: 0.8rem; line-height: 0.9; }

.oss-inner {
  display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center;
  border: 1px solid var(--line); border-radius: 22px; padding: 40px;
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
}
.oss h2 { margin-bottom: 10px; }
.mono { font-family: var(--mono); font-size: 0.78rem; color: var(--accent); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; overflow-x: auto; white-space: nowrap; }
.oss-card { border: 1px solid var(--line); border-radius: 14px; padding: 8px 18px; background: var(--bg); }
.oss-row { display: flex; justify-content: space-between; gap: 16px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 0.86rem; color: var(--muted); }
.oss-row:last-child { border-bottom: none; }
.ok { color: var(--accent); font-family: var(--mono); font-size: 0.74rem; }

.fit { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.fit-col { padding: 28px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); }
.fit-col h3 { margin-bottom: 14px; }
.fit-col ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 0.94rem; }
.fit-col li { margin-bottom: 8px; }
.fit-col.good { border-color: rgba(94,234,212,0.28); }
.fit-col.bad { opacity: 0.92; }

.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 860px; margin: 0 auto; }
.price-card {
  padding: 30px; border-radius: 20px; border: 1px solid var(--line);
  background: var(--panel); display: flex; flex-direction: column;
}
.price-card.featured {
  border-color: rgba(94,234,212,0.35);
  background: linear-gradient(180deg, rgba(94,234,212,0.07), var(--panel) 60%);
}
.badge { align-self: flex-start; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: #04110c; background: var(--accent); padding: 5px 10px; border-radius: 999px; margin-bottom: 14px; }
.price { font-size: 2.4rem; font-weight: 680; letter-spacing: -0.03em; }
.plus { font-size: 1.4rem; color: var(--muted-2); }
.price-sub { font-size: 0.86rem; margin: 4px 0 18px; color: var(--muted-2); }
.price-card ul { list-style: none; padding: 0; margin: 0 0 22px; flex: 1; }
.price-card li { padding: 8px 0 8px 22px; position: relative; color: var(--muted); font-size: 0.9rem; border-bottom: 1px solid var(--line); }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); }
.fine { font-size: 0.8rem; color: var(--muted-2); text-align: center; margin-top: 18px; }

.faq { max-width: 780px; }
.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 0.98rem; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-family: var(--mono); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 12px 0 0; font-size: 0.93rem; }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-copy h2 { margin-bottom: 14px; }
.contact-points { list-style: none; padding: 0; margin: 22px 0 0; }
.contact-points li { padding-left: 22px; position: relative; color: var(--muted); margin-bottom: 8px; font-size: 0.94rem; }
.contact-points li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }

.lead-form { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 28px; }
.field { margin-bottom: 15px; }
.field label { display: block; font-size: 0.8rem; font-weight: 600; margin-bottom: 6px; color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 13px; border-radius: 9px;
  background: var(--bg); border: 1px solid var(--line); color: var(--text);
  font: inherit; font-size: 0.92rem; outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field textarea:focus { border-color: var(--accent-2); box-shadow: 0 0 0 3px rgba(94,234,212,0.12); }
.field textarea { resize: vertical; }
.field .invalid { border-color: var(--danger); }
.form-note { font-size: 0.79rem; color: var(--muted-2); text-align: center; margin: 12px 0 0; }
.form-note.error { color: var(--danger); }

.footer { max-width: var(--max); margin: 0 auto; padding: 40px 24px 54px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.footer p { margin: 0; font-size: 0.84rem; }
.footer .brand { margin-bottom: 8px; }

@media (max-width: 900px) {
  .proof, .contact, .oss-inner { grid-template-columns: 1fr; gap: 30px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .nav nav { display: none; }
}
@media (max-width: 620px) {
  section { padding: 62px 18px; }
  .nav { padding: 13px 18px; }
  .grid-3, .fit, .price-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 62px; }
  .hero-actions .btn { width: 100%; }
  .phase-list li { grid-template-columns: 1fr; gap: 4px; }
  .oss-inner { padding: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}