:root { --bg: #0f172a; --fg: #e2e8f0; --accent: #38bdf8; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}
header, main, footer { max-width: 920px; margin: 0 auto; padding: 16px; }
header { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #1e293b; }
h1 { font-size: 1.3rem; margin: 0; }
a { color: var(--accent); text-decoration: none; }
nav a { margin-left: 12px; }
form { display: grid; gap: 10px; max-width: 360px; }
label { display: grid; gap: 4px; font-size: .9rem; }
input { padding: 8px; border-radius: 6px; border: 1px solid #334155; background: #0b1220; color: var(--fg); }
button { padding: 9px 14px; border: 0; border-radius: 6px; background: var(--accent); color: #042c3a; font-weight: 600; cursor: pointer; }
footer { color: #64748b; border-top: 1px solid #1e293b; font-size: .85rem; }
ul { padding-left: 18px; }