/* 认证页面样式 */

.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
  background: var(--white);
  border-radius: 1rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--dark-color);
  margin-bottom: 0.5rem;
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.auth-form {
  margin-bottom: 1.5rem;
}

.auth-form .form-group {
  margin-bottom: 1.25rem;
}

.auth-form .form-control {
  padding: 0.75rem 1rem;
  font-size: 1rem;
}

.auth-form .btn {
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.auth-links {
  text-align: center;
  font-size: 0.875rem;
}

.auth-links a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.auth-links a:hover {
  text-decoration: underline;
}

.auth-divider {
  text-align: center;
  margin: 1.5rem 0;
  position: relative;
}

.auth-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--border-color);
}

.auth-divider span {
  background-color: var(--white);
  padding: 0 1rem;
  position: relative;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* 记住我复选框 */
.form-check {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  margin-right: 0.5rem;
  cursor: pointer;
}

.form-check-label {
  font-size: 0.875rem;
  color: var(--dark-color);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

/* 密码强度指示器 */
.password-strength {
  margin-top: 0.5rem;
  height: 4px;
  background-color: var(--light-color);
  border-radius: 2px;
  overflow: hidden;
}

.password-strength-bar {
  height: 100%;
  transition: width 0.3s ease, background-color 0.3s ease;
}

.password-strength-weak {
  width: 33%;
  background-color: var(--danger-color);
}

.password-strength-medium {
  width: 66%;
  background-color: var(--warning-color);
}

.password-strength-strong {
  width: 100%;
  background-color: var(--success-color);
}

.password-strength-text {
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

.password-strength-text.weak {
  color: var(--danger-color);
}

.password-strength-text.medium {
  color: var(--warning-color);
}

.password-strength-text.strong {
  color: var(--success-color);
}

/* 错误和成功状态 */
.form-control.is-invalid {
  border-color: var(--danger-color);
}

.form-control.is-valid {
  border-color: var(--success-color);
}

.invalid-feedback {
  display: block;
  color: var(--danger-color);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.valid-feedback {
  display: block;
  color: var(--success-color);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* 加载状态 */
.auth-form .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-loading {
  position: relative;
  color: transparent;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  top: 50%;
  left: 50%;
  margin-left: -0.5rem;
  margin-top: -0.5rem;
  border: 2px solid var(--white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* 响应式 */
@media (max-width: 480px) {
  .auth-container {
    padding: 1rem;
  }
  
  .auth-card {
    padding: 1.5rem;
  }
  
  .auth-title {
    font-size: 1.25rem;
  }
}