:root { --bg: #fbfbfd; --fg: #16161d; --muted: #5b5b6b; --line: #e3e3ea; --accent: #2563eb; }
@media (prefers-color-scheme: dark) { :root { --bg: #111117; --fg: #ececf1; --muted: #a0a0b0; --line: #2a2a35; --accent: #7aa2ff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; justify-content: space-between; align-items: center; padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.logo { font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
nav a { margin-left: 18px; }
a { color: var(--accent); }
h1 { font-size: 32px; line-height: 1.2; margin: 40px 0 12px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
.hero p, .muted { color: var(--muted); }
.steps li { margin-bottom: 10px; }
footer { margin-top: 48px; padding-top: 16px; padding-bottom: 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo img { border-radius: 9px; }
nav { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; gap: 6px 18px; }
nav a { margin-left: 0; }
.app-icon { display: block; border-radius: 26px; margin: 40px 0 0; box-shadow: 0 8px 24px rgba(79, 70, 229, .25); }
.hero h1 { margin-top: 16px; }
.tagline { font-size: 20px; font-weight: 600; color: var(--fg) !important; margin: 0 0 8px; }
.btn { display: inline-block; padding: 12px 22px; border-radius: 10px; background: linear-gradient(135deg, #2563eb, #7c3aed); color: #fff !important; font-weight: 600; text-decoration: none; border: 0; font-size: 16px; cursor: pointer; }
.btn.small { padding: 6px 14px; font-size: 15px; }
.btn:hover { filter: brightness(1.08); }
.login { max-width: 440px; margin: 56px auto; text-align: center; }
.login .app-icon { margin: 0 auto 16px; }
.login .btn { width: 100%; margin: 16px 0 8px; }
header { gap: 12px; }