:root {
  color-scheme: dark;
  --ink: #e8eef2;
  --ink-soft: #a9b6bf;
  --ink-faint: #7d8a93;
  --glass: rgba(255, 255, 255, 0.06);
  --glass-edge: rgba(255, 255, 255, 0.14);
  --accent: #7fd3e6;
  --deep: #0b1418;
  --measure: 40rem;
}

* { box-sizing: border-box; }

html {
  background: var(--deep);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background:
    radial-gradient(60rem 40rem at 18% -10%, rgba(64, 140, 160, 0.38), transparent 70%),
    radial-gradient(50rem 36rem at 100% 20%, rgba(70, 72, 140, 0.30), transparent 70%),
    linear-gradient(180deg, #10232a 0%, var(--deep) 60%);
  background-attachment: fixed;
}

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { color: #a8e6f3; }

.page {
  max-width: calc(var(--measure) + 2rem);
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.brand img { width: 32px; height: 32px; border-radius: 8px; }

.nav-links { margin-left: auto; display: flex; gap: 1.1rem; font-size: 0.95rem; }
.nav-links a { color: var(--ink-soft); text-decoration: none; }
.nav-links a[aria-current="page"], .nav-links a:hover { color: var(--ink); }

.hero { text-align: center; margin: 1rem 0 2.5rem; }
.hero img { width: min(100%, 420px); height: auto; border-radius: 22px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45); }

h1 { font-size: 2.2rem; line-height: 1.15; margin: 0 0 0.6rem; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; margin: 2.2rem 0 0.6rem; }
p, li { color: var(--ink-soft); }
strong { color: var(--ink); font-weight: 600; }

.lede { font-size: 1.15rem; color: var(--ink); }

.card {
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  border-radius: 20px;
  padding: 1.25rem 1.4rem;
  margin: 1.25rem 0;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.card h2:first-child { margin-top: 0; }

ol, ul { padding-left: 1.3rem; }
li { margin: 0.35rem 0; }

.footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--glass-edge);
  color: var(--ink-faint);
  font-size: 0.9rem;
}

.footer p { color: var(--ink-faint); margin: 0.3rem 0; }

@media (max-width: 30rem) {
  h1 { font-size: 1.8rem; }
  .nav-links { gap: 0.8rem; }
}