:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --panel: #111722;
  --panel-2: #182130;
  --text: #e6e6e6;
  --muted: #9aa8bb;
  --line: #263247;
  --accent: #7aa2ff;
  --danger: #ff8e8e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: linear-gradient(180deg, #0b0f14 0%, #0f1520 100%);
  color: var(--text);
}
main { min-height: 100vh; display: grid; place-items: center; padding: 2rem; }
.landing-shell, .auth-shell { width: min(100%, 1000px); display: grid; gap: 1.5rem; grid-template-columns: 1.1fr .9fr; }
.app-shell { width: min(100%, 900px); }
.hero-card, .auth-card, .panel {
  background: rgba(17, 23, 34, 0.94);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 20px 60px rgba(0,0,0,.28);
}
.brand-mark {
  width: 72px; height: 72px; border-radius: 20px; display: grid; place-items: center;
  background: var(--panel-2); border: 1px solid var(--line); font-weight: 800; letter-spacing: .08em;
}
label { display: block; margin: 1rem 0 .35rem; color: var(--muted); }
input, select, button {
  width: 100%; border-radius: 14px; border: 1px solid var(--line); padding: .9rem 1rem;
  background: #0f1520; color: var(--text); font: inherit;
}
button {
  margin-top: 1rem; background: var(--accent); color: #08101f; border: none; font-weight: 700; cursor: pointer;
}
.form-error {
  background: rgba(255, 142, 142, 0.08); color: var(--danger); border: 1px solid rgba(255, 142, 142, 0.35);
  padding: .85rem 1rem; border-radius: 14px; margin-bottom: 1rem;
}
dl { display: grid; grid-template-columns: 160px 1fr; gap: .75rem 1rem; }
dt { color: var(--muted); }
dd { margin: 0; }
a { color: var(--accent); }
@media (max-width: 860px) {
  .landing-shell, .auth-shell { grid-template-columns: 1fr; }
  main { padding: 1rem; }
}