/* B27 v3.5 polish: 登录页样式 */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: linear-gradient(135deg, #3b82f6 0%, #1e40af 50%, #1e3a8a 100%);
  min-height: 100vh;
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #1f2937;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-page {
  width: 100%;
  max-width: 420px;
}
.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 36px 32px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.25), 0 4px 12px rgba(0,0,0,0.1);
}
.login-header {
  text-align: center;
  margin-bottom: 28px;
}
.login-title {
  font-size: 22px;
  font-weight: 700;
  color: #1e3a8a;
  margin: 0 0 8px;
  letter-spacing: 0.5px;
}
.login-subtitle {
  font-size: 13px;
  color: #6b7280;
  margin: 0;
}
.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.login-form[hidden] {
  display: none;
}
.login-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.login-row.is-checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #4b5563;
  cursor: pointer;
}
.login-row.is-checkbox input { width: 16px; height: 16px; cursor: pointer; }
.login-label {
  font-size: 12px;
  color: #6b7280;
  font-weight: 500;
}
.login-form input[type="text"],
.login-form input[type="password"] {
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  background: #f9fafb;
}
.login-form input:focus {
  border-color: #3b82f6;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}
.login-hint {
  font-size: 11px;
  color: #6b7280;
  margin-top: 2px;
}
.login-error {
  background: #fee2e2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
}
.login-btn {
  margin-top: 6px;
  padding: 12px 16px;
  background: #3b82f6;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
.login-btn:hover { background: #2563eb; }
.login-btn:active { transform: scale(0.98); }
.login-btn:disabled { background: #93c5fd; cursor: wait; }
.login-btn-secondary {
  margin-top: 4px;
  padding: 10px 16px;
  background: #fff;
  color: #4b5563;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}
.login-btn-secondary:hover { background: #f3f4f6; }
.login-footer {
  margin-top: 24px;
  text-align: center;
  color: #9ca3af;
  font-size: 11px;
}
.login-foot-hint { margin: 0; }
.setup-hint {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 12px 14px;
  color: #1e3a8a;
  font-size: 13px;
  line-height: 1.6;
}
.setup-icon { font-size: 18px; margin-right: 6px; }
@media (max-width: 480px) {
  .login-card { padding: 28px 22px; border-radius: 12px; }
  .login-title { font-size: 19px; }
}