:root {
  --bg: #07111f;
  --bg-deep: #040a12;
  --panel: #0b1728;
  --text: #e9f1fb;
  --muted: #7f93ad;
  --line: #17304f;
  --accent: #2f8cff;
  --accent-soft: rgba(47, 140, 255, .14);
  --max: 1040px;
}

* { box-sizing: border-box; }

html {
  background: var(--bg-deep);
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, rgba(28, 73, 126, .18), transparent 42rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover { text-decoration-thickness: 2px; }

.wrap {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .08em;
  font-size: 15px;
}

.brand span { color: var(--accent); }

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 13px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--text);
}

main {
  padding: 84px 0 96px;
}

.hero {
  max-width: 780px;
  padding: 14px 0 36px;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin: 0 0 16px;
}

h1, h2, h3 {
  line-height: 1.2;
  letter-spacing: -.02em;
}

h1 {
  margin: 0 0 22px;
  font-size: clamp(36px, 6vw, 66px);
  max-width: 13ch;
}

h2 {
  margin: 48px 0 14px;
  font-size: 22px;
}

h3 {
  margin: 28px 0 10px;
  font-size: 16px;
}

p {
  color: #b9c7d8;
  margin: 0 0 18px;
  max-width: 76ch;
}

.lead {
  font-size: clamp(17px, 2vw, 21px);
  color: #cbd7e5;
  max-width: 68ch;
}

.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0;
}

.tools {
  margin-top: 42px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tool {
  display: block;
  padding: 20px;
  border: 1px solid var(--line);
  background: rgba(11, 23, 40, .42);
  text-decoration: none;
}

.tool:hover {
  border-color: #27578c;
  background: var(--accent-soft);
}

.tool strong {
  display: block;
  color: var(--text);
  margin-bottom: 6px;
}

.tool span {
  color: var(--muted);
  font-size: 13px;
}

.content {
  max-width: 820px;
}

.content h1 {
  max-width: none;
  font-size: clamp(34px, 5vw, 52px);
}

.content ul {
  padding-left: 22px;
  color: #b9c7d8;
}

.content li {
  margin: 8px 0;
}

.note {
  margin: 28px 0;
  padding: 18px 20px;
  border-left: 2px solid var(--accent);
  background: var(--accent-soft);
  color: #c6d5e7;
}

.meta {
  margin-top: 48px;
  color: var(--muted);
  font-size: 12px;
}

footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 38px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

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

@media (max-width: 700px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 20px 0;
  }

  nav { gap: 14px; }

  main { padding: 56px 0 72px; }

  .tools { grid-template-columns: 1fr; }

  .footer-row { flex-direction: column; }
}