* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body.auth-page {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at 30% 20%, #1b2a3a 0%, #0b131c 60%, #05090d 100%);
  color: #f0f2f6;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: rgba(16, 22, 32, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 2rem 1.75rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}
.auth-brand {
  font-size: 1.15rem;
  color: #f4c744;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: 0.04em;
}
.auth-card h1 {
  margin: 0 0 0.4rem;
  font-size: 1.65rem;
  font-weight: 700;
}
.auth-sub {
  margin: 0 0 1.5rem;
  color: #a3b0c0;
  font-size: 0.95rem;
}
form label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: #c9d3df;
}
form input {
  display: block;
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #f0f2f6;
  font-size: 1rem;
  font: inherit;
}
form input:focus {
  outline: none;
  border-color: #f4c744;
  box-shadow: 0 0 0 2px rgba(244, 199, 68, 0.25);
}
.auth-hint {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8rem;
  color: #8090a0;
}
.auth-primary {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 0;
  border-radius: 10px;
  background: #f4c744;
  color: #1a1a1a;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.3rem;
}
.auth-primary:hover { background: #ffd45a; }
.auth-primary:disabled { opacity: 0.6; cursor: wait; }
.auth-error {
  margin: 1rem 0 0;
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  background: rgba(229, 80, 80, 0.15);
  border: 1px solid rgba(229, 80, 80, 0.4);
  color: #ffb5b5;
  font-size: 0.9rem;
}
.auth-switch {
  margin: 1.5rem 0 0;
  color: #a3b0c0;
  font-size: 0.9rem;
  text-align: center;
}
.auth-switch a { color: #f4c744; text-decoration: none; font-weight: 600; }
.auth-switch a:hover { text-decoration: underline; }