.hidden { display: none !important; }

.auth-shell {
  height: 100vh;
  width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--primary) 0%, var(--primary-dark) 100%);
}
.auth-card {
  width: 380px;
  max-width: calc(100vw - 48px);
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  padding: var(--sp-6) var(--sp-5) var(--sp-5);
}
.auth-brand {
  display: flex; align-items: center; gap: var(--sp-2);
  font-weight: 700; font-size: var(--fs-md);
  color: var(--primary-dark);
  margin-bottom: var(--sp-5);
}
.auth-brand .mark {
  width: 22px; height: 22px; border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: inline-block; position: relative;
}
.auth-brand .mark::after {
  content: ""; position: absolute; inset: 5px; border-radius: 3px;
  background: var(--accent); clip-path: polygon(0 0, 100% 50%, 0 100%);
}
.auth-card h1 { font-size: var(--fs-xl); margin: 0 0 4px; }
.auth-sub { color: var(--ink-muted); font-size: var(--fs-sm); margin: 0 0 var(--sp-4); }
.auth-error {
  background: var(--danger-tint); color: var(--danger);
  font-size: var(--fs-sm); padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm); margin-bottom: var(--sp-4);
}
.auth-field {
  display: block;
  margin-bottom: var(--sp-4);
}
.auth-field span {
  display: block;
  font-size: var(--fs-xs);
  color: var(--ink-muted);
  margin-bottom: 4px;
  font-weight: 600;
}
.auth-field input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0 var(--sp-3);
  font-size: var(--fs-base);
  background: var(--surface);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.auth-field input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-tint);
}
.auth-password-wrap { position: relative; }
.auth-password-wrap input { padding-right: 40px; }
.auth-eye {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border: none; background: transparent;
  color: var(--ink-faint); cursor: pointer; border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
}
.auth-eye:hover { background: var(--surface-sunken); color: var(--ink); }
.auth-remember {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: var(--fs-sm); color: var(--ink-muted);
  margin-bottom: var(--sp-5);
  cursor: pointer;
  user-select: none;
}
.auth-remember input { accent-color: var(--primary); width: 16px; height: 16px; }
.auth-submit {
  width: 100%; height: 42px;
  background: var(--primary); color: white;
  border: none; border-radius: var(--radius-sm);
  font-weight: 600; font-size: var(--fs-base);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease);
}
.auth-submit:hover { background: var(--primary-dark); }
.auth-submit:disabled { opacity: 0.6; cursor: not-allowed; }