.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(135deg, #4d163d, #7c285f);
}

.auth-back {
  position: static;
  inset: auto;
  background: transparent;
  backdrop-filter: none;
  z-index: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  width: 100%;
}

.auth-box {
  width: min(440px, 100%);
  background: var(--card, #fff);
  color: var(--ink, #111);
  border: 1px solid var(--border, #ddd);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 30px 100px rgba(0, 0, 0, .3);
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.auth-brand img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #fff;
  padding: 4px;
  object-fit: contain;
}

.auth-brand strong {
  display: block;
  color: var(--brand);
  font-size: 14px;
}

.auth-box h2 { margin: 0 0 6px; }
.auth-box p { margin: 0 0 20px; color: var(--muted, #666); }
.auth-field { margin: 12px 0; }
.auth-field label { display: block; font-size: 12px; font-weight: 700; margin-bottom: 6px; }
.auth-field input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  border: 1px solid var(--border, #ddd);
  border-radius: 12px;
  background: var(--bg, #fff);
  color: inherit;
}
.auth-btn {
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 12px;
  background: #111;
  color: #fff;
  font-weight: 800;
  cursor: pointer;
  margin-top: 10px;
}
.dark .auth-btn { background: #fff; color: #111; }
.auth-error { min-height: 18px; color: #c0392b; font-size: 12px; margin-top: 8px; }
.auth-demo {
  font-size: 11px;
  color: var(--muted);
  margin-top: 16px;
  padding: 10px;
  border-radius: 10px;
  background: rgba(127, 127, 127, .08);
}

@media (max-width: 700px) {
  .auth-box { padding: 22px; }
}