:root {
  color-scheme: light dark;
  --ink: #eaf3f8;
  --muted: #a8bdc9;
  --night: #07111f;
  --panel: #0e2133;
  --line: #284158;
  --sun: #ffb84a;
  --water: #45c4d6;
  --focus: #91e8f2;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--night); color: var(--ink); }

body { margin: 0; min-height: 100vh; background: linear-gradient(165deg, #07111f 0%, #0b1a2a 55%, #10283b 100%); }

a { color: var(--focus); text-underline-offset: .2em; }
a:hover { color: #c5f8ff; }
a:focus-visible, .card:focus-visible { outline: 3px solid var(--sun); outline-offset: 4px; }

.shell { width: min(70rem, calc(100% - 2rem)); margin: 0 auto; }

header { border-bottom: 1px solid var(--line); background: rgba(7, 17, 31, .9); }

.nav { min-height: 4.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { color: var(--ink); text-decoration: none; font-size: 1.08rem; font-weight: 750; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-weight: 600; text-decoration: none; }

main { padding: clamp(3rem, 8vw, 6.5rem) 0 5rem; }
.eyebrow { color: var(--sun); font-weight: 750; letter-spacing: .09em; text-transform: uppercase; font-size: .82rem; }
h1 { max-width: 15ch; margin: .65rem 0 1rem; font-size: clamp(2.5rem, 8vw, 5.4rem); line-height: .98; letter-spacing: -.055em; }
h2 { margin: 0 0 .65rem; font-size: clamp(1.35rem, 4vw, 1.75rem); letter-spacing: -.025em; }
h3 { margin: 1.8rem 0 .55rem; font-size: 1.08rem; }
p, li { font-size: 1rem; line-height: 1.65; }
.lead { max-width: 42rem; color: var(--muted); font-size: clamp(1.08rem, 3vw, 1.28rem); }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 2.5rem; }
.card { display: block; min-height: 12rem; padding: 1.5rem; border: 1px solid var(--line); border-radius: 1.2rem; background: rgba(14, 33, 51, .86); color: var(--ink); text-decoration: none; }
.card p { color: var(--muted); }
.card strong { color: var(--sun); }

.document { max-width: 49rem; }
.document h1 { max-width: none; font-size: clamp(2.4rem, 7vw, 4.4rem); }
.document section { margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.meta { color: var(--muted); }
.notice { margin: 2rem 0; padding: 1.1rem 1.25rem; border-left: 4px solid var(--sun); background: var(--panel); }

footer { padding: 2rem 0 3rem; border-top: 1px solid var(--line); color: var(--muted); }
footer p { font-size: .9rem; }

@media (max-width: 42rem) {
  .nav { align-items: flex-start; flex-direction: column; padding: 1rem 0; }
  .grid { grid-template-columns: 1fr; }
  .card { min-height: 0; }
}

@media (prefers-reduced-motion: no-preference) {
  .card { transition: transform .18s ease, border-color .18s ease; }
  .card:hover { transform: translateY(-2px); border-color: var(--water); }
}