:root {
  --bg: #0c1222;
  --card: #151d32;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --error: #f87171;
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.5; min-height: 100vh; }
.wrap { max-width: 960px; margin: 0 auto; padding: 1.25rem; }
.header { border-bottom: 1px solid rgba(255,255,255,.08); }
.header .wrap { display: flex; justify-content: space-between; align-items: center; }
.header nav a { color: var(--muted); margin-left: 1rem; text-decoration: none; }
.header nav a:hover { color: var(--accent); }
.hero { padding: 4rem 1.25rem; text-align: center; }
.hero h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: .75rem; }
.hero p { color: var(--muted); margin-bottom: 1.5rem; }
.actions { display: flex; gap: .75rem; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: .6rem 1.2rem; border-radius: 8px;
  border: 1px solid rgba(56,189,248,.35); background: transparent; color: var(--accent);
  cursor: pointer; text-decoration: none; font: inherit;
}
.btn.primary { background: rgba(56,189,248,.15); }
.btn:hover { background: rgba(56,189,248,.25); }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin: 2rem auto; }
.card { background: var(--card); border-radius: var(--radius); padding: 1.25rem; border: 1px solid rgba(255,255,255,.06); }
.card h3 { margin-bottom: .5rem; }
.muted { color: var(--muted); font-size: .9rem; }
.footer { color: var(--muted); text-align: center; padding: 2rem; }
.dashboard { padding-top: 2rem; }
.auth-card { max-width: 420px; margin: 0 auto; }
.auth-card label { display: block; margin-bottom: .75rem; font-size: .9rem; }
.auth-card input { width: 100%; margin-top: .25rem; padding: .5rem .65rem; border-radius: 6px; border: 1px solid rgba(255,255,255,.12); background: #0f172a; color: var(--text); }
.auth-card button[type=submit] { width: 100%; margin-top: .5rem; }
.link { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; }
.error { color: var(--error); margin-top: .75rem; }
.hidden { display: none !important; }
.usage-list { list-style: none; margin-top: .5rem; }
.usage-list li { padding: .35rem 0; border-bottom: 1px solid rgba(255,255,255,.06); font-size: .9rem; color: var(--muted); }
#accountPanel .card label { display: block; margin: .5rem 0; font-size: .85rem; }
#accountPanel .card input { width: 100%; margin-top: .2rem; padding: .45rem; border-radius: 6px; border: 1px solid rgba(255,255,255,.12); background: #0f172a; color: var(--text); }