/* Project Blueprint — landing. Dark monochrome ramp, one accent, dense and quiet. */

:root {
  --bg: #0c0d0f;
  --panel: #121316;
  --panel-2: #17181c;
  --line: #26272c;
  --text: #e8e6e1;
  --muted: #9a978f;
  --dim: #6b6963;
  --accent: #59b0f6;
  --accent-ink: #0a0f14;
  --good: #4ade80;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1060px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }

/* nav */
header.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(12, 13, 15, 0.88); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
header.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { font-family: var(--mono); font-size: 13px; letter-spacing: 2px; color: var(--text); }
.brand b { color: var(--accent); }
.nav-cta {
  font-family: var(--mono); font-size: 13px; padding: 8px 16px;
  background: var(--accent); color: var(--accent-ink); border-radius: 8px;
}
.nav-cta:hover { text-decoration: none; filter: brightness(1.1); }

/* hero */
.hero { padding: 88px 0 64px; border-bottom: 1px solid var(--line); }
.hero .kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: 3px;
  color: var(--dim); text-transform: uppercase; margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 56px); line-height: 1.08;
  letter-spacing: -0.02em; font-weight: 700; max-width: 17ch;
}
.hero .sub { margin-top: 22px; max-width: 62ch; color: var(--muted); font-size: 18px; }
.hero .sub strong { color: var(--text); font-weight: 600; }
.cta-row { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; align-items: center; }
.btn-buy {
  font-family: var(--mono); font-size: 15px; padding: 14px 26px;
  background: var(--accent); color: var(--accent-ink); border-radius: 8px; font-weight: 600;
}
.btn-buy:hover { text-decoration: none; filter: brightness(1.1); }
.btn-ghost {
  font-family: var(--mono); font-size: 14px; padding: 13px 22px;
  border: 1px solid var(--line); color: var(--text); border-radius: 8px; background: var(--panel);
}
.btn-ghost:hover { text-decoration: none; border-color: var(--dim); }
.price-note { font-family: var(--mono); font-size: 13px; color: var(--dim); }

/* sections */
section { padding: 72px 0; border-bottom: 1px solid var(--line); }
h2 { font-size: 28px; letter-spacing: -0.01em; margin-bottom: 10px; }
.lede { color: var(--muted); max-width: 68ch; margin-bottom: 36px; }
.lede strong { color: var(--text); }

/* gate demo */
.gate-demo {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 22px 24px; font-family: var(--mono); font-size: 13.5px; line-height: 1.7;
  overflow-x: auto; margin-top: 8px;
}
.gate-demo .c { color: var(--dim); }
.gate-demo .k { color: var(--accent); }
.gate-demo .g { color: var(--good); }

/* blueprint grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 22px; display: flex; flex-direction: column; gap: 10px;
}
.card .num { font-family: var(--mono); font-size: 12px; color: var(--dim); letter-spacing: 2px; }
.card h3 { font-size: 17px; font-weight: 650; }
.card p { color: var(--muted); font-size: 14.5px; flex: 1; }
.card .meta { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.card.free { border-color: rgba(89, 176, 246, 0.5); }
.card.free .num { color: var(--accent); }

/* pricing */
.price-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  max-width: 520px; padding: 34px 36px;
}
.price-card .amount { font-family: var(--mono); font-size: 44px; font-weight: 700; }
.price-card .amount span { font-size: 16px; color: var(--dim); font-weight: 400; }
.price-card ul { list-style: none; margin: 22px 0 26px; }
.price-card li { padding: 7px 0; color: var(--muted); font-size: 15px; }
.price-card li::before { content: "→ "; font-family: var(--mono); color: var(--accent); }
.guarantee { font-size: 13.5px; color: var(--dim); margin-top: 16px; }

/* FAQ */
.faq details {
  border: 1px solid var(--line); border-radius: 8px; background: var(--panel);
  margin-bottom: 10px; padding: 0 20px;
}
.faq summary {
  cursor: pointer; padding: 16px 0; font-weight: 600; font-size: 15.5px; list-style: none;
}
.faq summary::before { content: "+ "; font-family: var(--mono); color: var(--accent); }
.faq details[open] summary::before { content: "− "; }
.faq details p { color: var(--muted); font-size: 14.5px; padding-bottom: 18px; max-width: 75ch; }

/* footer */
footer { padding: 44px 0 64px; color: var(--dim); font-size: 13px; font-family: var(--mono); }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* thanks page */
.thanks-box {
  max-width: 560px; margin: 96px auto; background: var(--panel);
  border: 1px solid var(--line); border-radius: 10px; padding: 40px;
}
.thanks-box h1 { font-size: 26px; margin-bottom: 14px; }
.thanks-box p { color: var(--muted); margin-bottom: 12px; }
.status { font-family: var(--mono); font-size: 13px; color: var(--dim); }

/* sample article */
article.blueprint {
  max-width: 780px; margin: 0 auto; padding: 56px 24px 96px;
}
article.blueprint h1 { font-size: 34px; letter-spacing: -0.02em; margin: 24px 0 16px; }
article.blueprint h2 { font-size: 24px; margin: 40px 0 12px; }
article.blueprint h3 { font-size: 18px; margin: 28px 0 10px; }
article.blueprint p, article.blueprint li { color: #c9c6bf; font-size: 15.5px; }
article.blueprint ul, article.blueprint ol { padding-left: 26px; margin: 12px 0; }
article.blueprint code {
  font-family: var(--mono); font-size: 13px; background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px;
}
article.blueprint pre {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 18px 20px; overflow-x: auto; margin: 16px 0;
}
article.blueprint pre code { background: none; border: none; padding: 0; }
article.blueprint hr { border: none; border-top: 1px solid var(--line); margin: 32px 0; }
article.blueprint table { border-collapse: collapse; margin: 16px 0; width: 100%; }
article.blueprint th, article.blueprint td {
  border: 1px solid var(--line); padding: 8px 12px; font-size: 14px; text-align: left;
}
article.blueprint blockquote {
  border-left: 3px solid var(--accent); padding-left: 16px; color: var(--muted); margin: 16px 0;
}

@media (max-width: 640px) {
  .hero { padding: 56px 0 44px; }
  section { padding: 52px 0; }
}