:root {
  --bg: #111827;
  --bg-2: #1f2937;
  --text: #f9fafb;
  --muted: #9ca3af;
  --line: #374151;
  --fin: #ffd400;
  --ia: #00e5ff;
  --sau: #39ff88;
  --bel: #ff5fa2;
  --car: #ffa62b;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
a { color: inherit; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

header.top {
  border-bottom: 1px solid var(--line);
}
header.top .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo { font-weight: 900; letter-spacing: .5px; text-decoration: none; font-size: 1.1rem; }
.logo span { color: var(--ia); }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: .95rem; }
nav a:hover { color: var(--text); }

.hero { padding: 88px 0 56px; }
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900; line-height: 1.05; letter-spacing: -1px;
}
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--fin), var(--ia), var(--sau), var(--bel), var(--car));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--muted); font-size: 1.15rem; max-width: 620px; margin-top: 18px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; padding-bottom: 64px; }
.card {
  background: var(--bg-2); border: 1px solid var(--line); border-top: 4px solid var(--c);
  border-radius: 14px; padding: 22px 20px; display: flex; flex-direction: column; gap: 10px;
}
.card h2 { font-size: 1.15rem; font-weight: 900; }
.card h2 b { color: var(--c); }
.card p { color: var(--muted); font-size: .93rem; flex: 1; }
.card .handle { font-size: .9rem; color: var(--c); text-decoration: none; font-weight: 600; }
.card .handle:hover { text-decoration: underline; }

section.about { border-top: 1px solid var(--line); padding: 56px 0; }
section.about h2 { font-size: 1.5rem; margin-bottom: 14px; }
section.about p { color: var(--muted); max-width: 760px; margin-bottom: 12px; }

.doc { padding: 56px 0 72px; max-width: 760px; }
.doc h1 { font-size: 2rem; font-weight: 900; margin-bottom: 6px; }
.doc .date { color: var(--muted); margin-bottom: 32px; font-size: .95rem; }
.doc h2 { font-size: 1.2rem; margin: 30px 0 10px; }
.doc p, .doc li { color: #d1d5db; margin-bottom: 10px; }
.doc ul { padding-left: 22px; }
.doc a { color: var(--ia); }

footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: .9rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
footer a { color: var(--muted); }

@media (max-width: 560px) {
  nav a { margin-left: 14px; font-size: .88rem; }
  .hero { padding: 56px 0 40px; }
}