:root {
  --navy-950: #071f35;
  --navy-900: #0b3456;
  --teal-700: #087d8c;
  --teal-100: #dff5f6;
  --cream: #f7f7f3;
  --white: #fff;
  --text: #263846;
  --muted: #5b6d7a;
  --line: #dce5ea;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--cream); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: var(--teal-700); }
:focus-visible { outline: 3px solid rgba(7,152,169,.35); outline-offset: 3px; }
.container { width: min(calc(100% - 36px), 880px); margin-inline: auto; }
.header { border-bottom: 1px solid var(--line); background: var(--white); }
.header-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: var(--navy-950); font-weight: 900; letter-spacing: .06em; text-decoration: none; }
.brand span { color: var(--teal-700); }
.back { color: var(--navy-900); font-size: .86rem; font-weight: 800; text-decoration: none; }
main { padding: 72px 0 88px; }
.eyebrow { margin: 0 0 10px; color: var(--teal-700); font-size: .75rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
h1, h2 { color: var(--navy-950); line-height: 1.2; letter-spacing: -.025em; text-wrap: balance; }
h1 { margin: 0 0 18px; font-size: clamp(2.25rem, 7vw, 4rem); }
h2 { margin: 38px 0 12px; font-size: 1.35rem; }
.intro { max-width: 720px; color: var(--muted); font-size: 1.06rem; }
.intro.centered { margin-inline: auto; }
.notice { margin: 28px 0; border-left: 4px solid var(--teal-700); border-radius: 0 12px 12px 0; padding: 18px 20px; background: var(--teal-100); }
ul { padding-left: 22px; }
li { margin: 7px 0; }
.updated { margin-top: 44px; border-top: 1px solid var(--line); padding-top: 18px; color: var(--muted); font-size: .82rem; }
.footer { padding: 28px 0; color: #c7d6df; background: var(--navy-950); font-size: .8rem; }
.footer a { color: #fff; }
.error-shell { min-height: calc(100vh - 132px); display: grid; place-items: center; text-align: center; }
.error-code { margin: 0; color: var(--teal-700); font-size: clamp(5rem, 20vw, 10rem); font-weight: 900; line-height: .9; }
.button { display: inline-flex; margin-top: 20px; border-radius: 10px; padding: 12px 19px; color: #fff; background: var(--navy-900); font-size: .88rem; font-weight: 800; text-decoration: none; }
@media (max-width: 560px) { main { padding: 52px 0 70px; } .header-row { min-height: 68px; } }