/* 通用认证页面样式 */
:root {
  --primary-color: #4285f4;
  --primary-hover: #3367d6;
  --success-color: #0f9d58;
  --danger-color: #db4437;
  --warning-color: #f4b400;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --bg-main: #ffffff;
  --bg-secondary: #f8f9fa;
  --border-color: #dadce0;
  --shadow-color: rgba(60, 64, 67, 0.15);
  --card-bg: #ffffff;
  --transition-speed: 0.3s;
}

.dark-mode {
  --primary-color: #8ab4f8;
  --primary-hover: #aecbfa;
  --success-color: #81c995;
  --danger-color: #f28b82;
  --warning-color: #fdd663;
  --text-primary: #e8eaed;
  --text-secondary: #9aa0a6;
  --bg-main: #202124;
  --bg-secondary: #303134;
  --border-color: #5f6368;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --card-bg: #303134;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.content-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.auth-container {
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 4px 20px var(--shadow-color);
  width: 100%;
  max-width: 450px;
  padding: 2.5rem;
  transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

.logo-container {
  text-align: center;
  margin-bottom: 1.5rem;
}

.logo-container img {
  height: 60px;
  width: auto;
}

h1, h2 {
  color: var(--text-primary);
  text-align: center;
  font-weight: 500;
  margin-bottom: 1.5rem;
  transition: color var(--transition-speed);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-speed);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  transition: border-color var(--transition-speed), background-color var(--transition-speed), color var(--transition-speed);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

.btn {
  display: block;
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-success {
  background-color: var(--success-color);
  color: white;
}

.btn-success:hover {
  opacity: 0.9;
}

.alert {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

.alert-danger {
  background-color: var(--danger-color);
  color: white;
}

.alert-success {
  background-color: var(--success-color);
  color: white;
}

.alert-info {
  background-color: var(--primary-color);
  color: white;
}

.alert-warning {
  background-color: var(--warning-color);
  color: var(--text-primary);
}

.text-center {
  text-align: center;
}

.mt-3 {
  margin-top: 1.5rem;
}

.mb-4 {
  margin-bottom: 2rem;
}

.d-none {
  display: none !important;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-speed);
}

a:hover {
  text-decoration: underline;
}

.helper-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 576px) {
  .auth-container {
    padding: 1.5rem;
  }
}

/* 页脚样式 */
footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  background-color: var(--bg-main);
  border-top: 1px solid var(--border-color);
  transition: background-color var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
}

/* 主题切换器 */
.theme-switcher {
  position: absolute;
  top: 1rem;
  right: 4rem;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--text-secondary);
  transition: color var(--transition-speed);
}

/* 语言切换器 */
.language-switcher {
  position: absolute;
  top: 1rem;
  right: 1rem;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text-secondary);
  transition: color var(--transition-speed);
}

/* 表单验证样式 */
.form-control.is-invalid {
  border-color: var(--danger-color);
}

.invalid-feedback {
  display: none;
  color: var(--danger-color);
  font-size: 0.8rem;
  margin-top: 0.25rem;
}

.form-control.is-invalid + .invalid-feedback,
.form-control.is-invalid ~ .invalid-feedback {
  display: block;
}

/* 性别单选按钮 */
.radio-group {
  display: flex;
  gap: 1rem;
}

.radio-option {
  display: flex;
  align-items: center;
}

.radio-option input[type="radio"] {
  margin-right: 0.5rem;
}

/* 密码框样式 */
.password-container {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  color: var(--text-secondary);
}

/* 加载动画 */
.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 0.15rem solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s linear infinite;
  margin-right: 0.5rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}