:root {
  --auth-bg: #0f1419;
  --auth-card: #1a222c;
  --auth-text: #f5f7fa;
  --auth-muted: #9aa5b1;
  --auth-accent: #3b82f6;
  --auth-accent-hover: #2563eb;
  --auth-border: #2d3748;
  --auth-error: #f87171;
}

* { box-sizing: border-box; }

body.auth-page {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1e293b, var(--auth-bg));
  color: var(--auth-text);
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.auth-card {
  width: min(100%, 26rem);
  background: var(--auth-card);
  border: 1px solid var(--auth-border);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.auth-title {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
}

.auth-lead {
  margin: 0 0 1.5rem;
  color: var(--auth-muted);
  line-height: 1.5;
}

.auth-footer {
  margin: 1.25rem 0 0;
  text-align: center;
  color: var(--auth-muted);
}

.auth-link {
  color: var(--auth-accent);
  text-decoration: none;
}

.auth-link:hover { text-decoration: underline; }

.auth-flash {
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.95rem;
}

.auth-flash--notice { background: #064e3b; color: #a7f3d0; }
.auth-flash--alert { background: #7f1d1d; color: #fecaca; }

.firebase-auth__providers,
.firebase-auth__form {
  display: grid;
  gap: 0.75rem;
}

.firebase-auth__divider {
  margin: 1.25rem 0;
  text-align: center;
  color: var(--auth-muted);
  font-size: 0.9rem;
}

.firebase-auth__error {
  margin: 0 0 1rem;
  padding: 0.75rem;
  border-radius: 0.5rem;
  background: rgba(248, 113, 113, 0.15);
  color: var(--auth-error);
}

.auth-field {
  display: grid;
  gap: 0.35rem;
}

.auth-field__label {
  font-size: 0.9rem;
  color: var(--auth-muted);
}

.auth-input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 0.5rem;
  border: 1px solid var(--auth-border);
  background: #111827;
  color: var(--auth-text);
  font: inherit;
}

.auth-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.auth-button--primary {
  background: var(--auth-accent);
  color: white;
}

.auth-button--primary:hover { background: var(--auth-accent-hover); }

.auth-button--secondary {
  background: #111827;
  color: var(--auth-text);
  border: 1px solid var(--auth-border);
}

.auth-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.firebase-auth {
  display: grid;
  gap: 0.75rem;
}

.firebase-auth__hint {
  margin: 0;
  color: var(--auth-muted);
  font-size: 0.9rem;
  line-height: 1.45;
  text-align: center;
}

.firebase-auth__status {
  margin: 0;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: #064e3b;
  color: #a7f3d0;
  font-size: 0.95rem;
}

.firebase-auth__providers,
.firebase-auth__form {
  display: grid;
  gap: 0.75rem;
}

.firebase-auth__divider {
  margin: 0.5rem 0;
  text-align: center;
  color: var(--auth-muted);
  font-size: 0.9rem;
}

.firebase-auth__error {
  margin: 0;
  padding: 0.75rem;
  border-radius: 0.5rem;
  background: rgba(248, 113, 113, 0.15);
  color: var(--auth-error);
}