:root {
  --bg: #0a0e14;
  --bg-soft: #0f1520;
  --surface: #141b26;
  --border: rgba(110, 200, 255, 0.14);
  --text: #e8eef6;
  --text-soft: #b7c3d3;
  --muted: #7a8a9e;
  --blue: #6ec8ff;
  --blue-dim: rgba(110, 200, 255, 0.12);
  --font: "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f7fb;
    --bg-soft: #eef3f9;
    --surface: #ffffff;
    --border: rgba(20, 40, 70, 0.1);
    --text: #121821;
    --text-soft: #3a4a5c;
    --muted: #5a6b7c;
    --blue: #1a7fbf;
    --blue-dim: rgba(26, 127, 191, 0.08);
  }
}

* { box-sizing: border-box; }

html { color-scheme: dark light; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(110, 200, 255, 0.14), transparent 55%),
    radial-gradient(700px 380px at 100% 0%, rgba(110, 200, 255, 0.06), transparent 50%),
    linear-gradient(180deg, var(--bg-soft), var(--bg) 40%);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

.wrap {
  width: min(720px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin-bottom: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 650;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; opacity: 0.92; }

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(110, 200, 255, 0.35), transparent 55%),
    var(--surface);
  border: 1px solid var(--border);
  box-shadow: inset 0 0 0 1px rgba(110, 200, 255, 0.08);
  position: relative;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1.5px solid var(--blue);
  border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  opacity: 0.9;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.nav-links a {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--blue-dim);
  text-decoration: none;
}
.nav-links a.active {
  color: var(--blue);
  background: var(--blue-dim);
  border-color: var(--border);
}

.card {
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 28px 32px;
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
}

@media (prefers-color-scheme: light) {
  .card { box-shadow: 0 12px 40px rgba(20, 40, 70, 0.08); }
}

.eyebrow {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--blue-dim);
  color: var(--blue);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.meta {
  margin: 0 0 1.4rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.lead {
  margin: 0 0 0.2rem;
  color: var(--text-soft);
  font-size: 1.05rem;
}

h2 {
  margin: 1.7em 0 0.55em;
  font-size: 1.08rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text);
}

p {
  margin: 0 0 0.85em;
  color: var(--text-soft);
}

strong { color: var(--text); font-weight: 650; }

.disclaimer {
  margin-top: 0.4em;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--blue-dim);
  color: var(--text-soft);
  font-size: 0.92rem;
  font-family: var(--mono);
  line-height: 1.5;
}

.footer {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer a { color: var(--muted); }
.footer a:hover { color: var(--blue); }

@media (max-width: 520px) {
  .wrap { width: min(100% - 28px, 720px); padding-top: 20px; }
  .card { padding: 22px 18px 26px; border-radius: 14px; }
}