/* Login / registration overlay. */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
}
.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border-radius: 24px;
  padding: 44px 36px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.10);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}
.auth-logo { font-size: 1.55rem; font-weight: 700; letter-spacing: -0.02em; }
.auth-sub { color: var(--muted); font-size: 0.92rem; margin-bottom: 10px; }
.auth-card input {
  height: 50px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0 16px;
  font-size: 1rem;
  font-family: inherit;
  background: #fafafa;
}
.auth-card input:focus { outline: none; border-color: var(--accent); background: #fff; }
.auth-error { color: var(--bad); font-size: 0.85rem; }