:root {
  --bg: #0b0f14;
  --surface: #121821;
  --border: #1f2937;
  --text: #e6edf3;
  --muted: #8b98a5;
  --accent: #5eead4;
  --accent-dim: #14b8a6;
  --radius: 14px;
  --wrap: 1040px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 20, 0.85);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #04211d;
  font-weight: 800;
  font-size: 16px;
}

.brand-name { font-size: 17px; }

.nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14.5px;
  transition: color 0.15s ease;
}

.nav a:hover { color: var(--text); }

/* hero */
.hero { padding: 96px 0 72px; }

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.lede {
  margin: 0 0 32px;
  max-width: 620px;
  color: var(--muted);
  font-size: 17.5px;
}

.actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 9px;
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn.primary {
  background: var(--accent);
  color: #04211d;
}

.btn.primary:hover { background: #7df0dd; }

.btn.ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn.ghost:hover { border-color: #334155; background: var(--surface); }

/* cards */
.cards { padding: 24px 0 72px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.8px;
}

/* note */
.note { padding: 8px 0 88px; }

.note h2 {
  margin: 0 0 14px;
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: -0.02em;
}

.note p {
  margin: 0;
  max-width: 660px;
  color: var(--muted);
}

/* prose pages */
.page { padding: 72px 0 88px; }

.page h1 {
  margin: 0 0 26px;
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.025em;
}

.page h2 {
  margin: 40px 0 12px;
  font-size: 19px;
}

.page p, .page li {
  color: var(--muted);
  max-width: 680px;
}

.page ul { padding-left: 20px; }

.page a { color: var(--accent); }

/* contact + details */
.contact-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
  max-width: 520px;
}

.contact-list li {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface);
  font-size: 15px;
}

.contact-list .k {
  color: var(--muted);
  min-width: 84px;
  font-size: 13.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* 404 */
.center-page {
  min-height: 58vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 72px 24px;
}

.center-page h1 {
  margin: 0 0 12px;
  font-size: 56px;
  letter-spacing: -0.04em;
}

.center-page p { color: var(--muted); margin: 0 0 26px; }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  font-size: 13.5px;
  color: var(--muted);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.muted { color: #64748b; }

@media (max-width: 600px) {
  .hero { padding: 64px 0 48px; }
  .nav { gap: 16px; }
  .site-header .wrap { min-height: 60px; }
}