:root { color-scheme: dark; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: #111b23; color: #e8f0f2; }
body::before { content: ""; position: fixed; inset: 0; z-index: -1; background: radial-gradient(circle at 75% 10%, #1b3b41 0, transparent 38%), radial-gradient(circle at 0 70%, #152b35 0, transparent 45%); }
.page { min-height: 100vh; display: flex; flex-direction: column; width: min(1040px, calc(100% - 40px)); margin: auto; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 28px 0; border-bottom: 1px solid #30404a; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #e8f0f2; text-decoration: none; font-weight: 740; font-size: 20px; letter-spacing: .05em; }
.mark { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; color: #0c2628; background: #8edbc5; font-size: 19px; }
nav { display: flex; gap: 22px; } nav a, .text-link { color: #abc9c9; text-decoration: none; } nav a:hover, .text-link:hover { color: #e8f0f2; } nav a[aria-current] { color: #e8f0f2; }
main { flex: 1; padding: clamp(60px, 12vh, 120px) 0 80px; }
.eyebrow { margin: 0 0 14px; color: #8edbc5; text-transform: uppercase; font-size: 12px; font-weight: 700; letter-spacing: .15em; }
h1 { margin: 0; font-size: clamp(37px, 7vw, 70px); letter-spacing: -.055em; line-height: 1.05; }
.lead { max-width: 740px; margin: 22px 0 42px; color: #b8c8cd; font-size: clamp(17px, 2vw, 21px); line-height: 1.65; }
.card { max-width: 780px; padding: clamp(24px, 5vw, 38px); border: 1px solid #385057; border-radius: 18px; background: #1a2a32; box-shadow: 0 18px 50px #0811173b; }
.card-head { display: flex; align-items: center; gap: 12px; } .card h2 { margin: 0; font-size: 23px; }
.pulse { width: 11px; height: 11px; border-radius: 50%; background: #8edbc5; box-shadow: 0 0 0 5px #8edbc527; }
.card p, .notes p { color: #b8c8cd; line-height: 1.65; }
button { appearance: none; margin: 14px 0 18px; padding: 13px 22px; border: 0; border-radius: 10px; color: #0b292b; background: #8edbc5; font: inherit; font-weight: 700; cursor: pointer; }
button:hover { background: #b1edda; } button:disabled { opacity: .65; cursor: wait; }
output { display: block; min-height: 24px; color: #d5e6e4; }
.notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px; max-width: 780px; margin-top: 54px; }
.notes h2 { margin: 0 0 8px; font-size: 18px; }
.notes p { margin: 0; }
.text-link { display: inline-block; margin-top: 40px; }
footer { display: flex; justify-content: space-between; gap: 24px; padding: 24px 0 34px; border-top: 1px solid #30404a; color: #839aa2; font-size: 13px; }
@media (max-width: 650px) { .topbar, footer { flex-wrap: wrap; } .notes { grid-template-columns: 1fr; gap: 26px; } main { padding-top: 70px; } }