:root {
  --bg: #0f172a;
  --card: #111827;
  --card2: #172033;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --accent: #38bdf8;
  --accent2: #0ea5e9;
  --error: #fecaca;
  --ok: #bbf7d0;
  --border: rgba(255,255,255,.12);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(circle at top left, #1e3a8a 0, var(--bg) 42%);
  color: var(--text);
}
.shell {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0;
}
.card {
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0,0,0,.35);
  margin-bottom: 18px;
}
.login-card { max-width: 460px; margin: 0 auto; }
h1 { margin: 0 0 12px; font-size: clamp(30px, 5vw, 46px); }
h2 { margin-top: 0; }
p, li { color: var(--muted); line-height: 1.6; }
.subtitle { margin-bottom: 24px; }
label { display: block; margin: 16px 0; color: var(--muted); font-weight: 650; }
input {
  width: 100%;
  display: block;
  margin-top: 8px;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(15,23,42,.7);
  color: var(--text);
  font: inherit;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
button, .button {
  display: inline-block;
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  background: var(--accent2);
  color: white;
  text-decoration: none;
  font-weight: 750;
  cursor: pointer;
}
button { width: 100%; margin-top: 10px; font: inherit; }
.button.ghost { background: transparent; border: 1px solid var(--border); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.error { color: var(--error); font-weight: 750; }
.ok { color: var(--ok); }
code {
  background: rgba(255,255,255,.09);
  padding: 2px 6px;
  border-radius: 7px;
}
.muted { opacity: .95; }