* { box-sizing: border-box; }
:root { color-scheme: dark; --accent: #6ef3b2; --muted: #a6b0be; }
body { margin: 0; background: #0b0c10; color: #eef1f5; font: 17px/1.7 system-ui, sans-serif; }
a { color: var(--accent); text-underline-offset: 4px; }
nav, main, footer { max-width: 1100px; margin: auto; padding: 24px 32px; }
nav, footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
nav { border-bottom: 1px solid #253a45; }
nav a { text-decoration: none; }
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; padding: 48px 0; }
.eyebrow { color: var(--accent); font: 12px/1.5 ui-monospace, monospace; text-transform: uppercase; letter-spacing: .12em; }
h1 { font-size: clamp(40px, 7vw, 72px); line-height: 1.1; letter-spacing: -.04em; margin: 16px 0; }
h2 { line-height: 1.25; }
.tagline { color: var(--accent); font-size: 24px; }
.lead, .status p { color: var(--muted); }
.facts { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; }
.facts li { border: 1px solid #34463f; border-radius: 99px; padding: 5px 14px; font-size: 14px; }
figure { margin: 0; text-align: center; }
figure img { display: block; width: 100%; max-width: 310px; height: auto; margin: auto; border: 1px solid #34463f; border-radius: 14px; }
figcaption { color: var(--muted); font-size: 13px; margin-top: 12px; }
.status { background: #14181e; border: 1px solid #253a45; border-radius: 14px; padding: 24px; }
.status h2 { margin: 0; font-size: 22px; }
.status p { margin-bottom: 0; }
.columns { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 24px 0; }
li { margin-bottom: 8px; }
footer { border-top: 1px solid #253a45; color: var(--muted); font-size: 14px; }
.equation-demo { padding: 32px; background: #f8f9f2; color: #203c39; border-radius: 16px; text-align: center; }
.equation-demo p { margin: 16px 0; }
.equation { font-size: clamp(24px, 4vw, 36px); font-weight: 700; }
.equation span { display: inline-block; padding: 8px 14px; background: #e1f1e8; border-radius: 12px; }
@media (max-width: 650px) { nav, main, footer { padding: 20px; } .hero, .columns { grid-template-columns: 1fr; gap: 24px; } .hero { padding: 24px 0; } }