*,
*::before,
*::after {
  box-sizing: border-box;
}

/* 基础变量 */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --danger-color: #dc3545;
  --success-color: #28a745;
  --gray-50: #f9fafb;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6c757d;
  --gray-600: #4b5563;
  --gray-700: #495057;
  --gray-800: #1f2937;
  --gray-900: #212529;
  --red-500: #ef4444;
  --green-500: #10b981;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: var(--gray-700);
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 加载动画 */
#initialLoader {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-spinner .spinner-icon {
  animation: rotate 1.5s linear infinite;
}

.loading-spinner .spinner-circle {
  stroke: white;
  stroke-linecap: round;
  animation: dash 1.5s ease-in-out infinite;
}

@keyframes rotate {
  100% { transform: rotate(360deg); }
}

@keyframes dash {
  0% { stroke-dasharray: 1, 150; stroke-dashoffset: 0; }
  50% { stroke-dasharray: 90, 150; stroke-dashoffset: -35; }
  100% { stroke-dasharray: 90, 150; stroke-dashoffset: -124; }
}

/* 工具类 */
.hidden {
  display: none !important;
}

/* 登录页面 */
#loginPage {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.login-card {
  background: white;
  padding: 2.5rem;
  border-radius: 1rem;
  box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.login-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.login-subtitle {
  color: var(--gray-500);
  margin: 0.5rem 0 2rem;
}

.login-footer {
  text-align: center;
  margin-top: 3rem;
}

.footer-text {
  color: var(--gray-500);
  font-size: 0.875rem;
}

/* 表单 */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--gray-700);
  text-align: left;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-hint {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--gray-500);
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

.btn-outline {
  background-color: white;
  color: var(--gray-700);
  border-color: var(--gray-200);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--gray-100);
  border-color: var(--gray-300);
}

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

.btn-danger:hover:not(:disabled) {
  background-color: #c82333;
}

.btn-full-width {
  width: 100%;
}

.btn-flex {
  flex: 1;
}

.btn-back-login {
  margin-top: 1rem;
}

/* 认证切换 */
.auth-switch {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
  text-align: center;
  color: var(--gray-500);
}

.auth-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.auth-link:hover {
  color: var(--primary-dark);
}

/* 成功消息 */
.success-message {
  text-align: center;
  padding: 2rem;
}

.success-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1rem;
  color: var(--success-color);
}

.success-message h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.success-message p {
  color: var(--gray-600);
  margin-bottom: 0;
}

/* 导航栏 */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 50;
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--gray-100);
  border-radius: 0.5rem;
  font-weight: 500;
  color: var(--gray-700);
  font-size: 0.9rem;
}

/* 主容器 */
.container {
  flex: 1;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 2rem;
  width: 100%;
}

.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

/* 卡片 */
.card {
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.card-title {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--gray-800);
  margin-bottom: 1.5rem;
}

.card-qr-list {
  margin-top: 2rem;
}

/* QR 预览 */
.qr-preview {
  text-align: center;
  padding: 2rem;
  background: var(--gray-50);
  border-radius: 1rem;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.qr-image {
  max-width: 100%;
  border-radius: 0.5rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.qr-actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
}

/* QR 列表 */
.qr-list {
  margin-top: 1rem;
}

.qr-item {
  background: white;
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.qr-item-info {
  flex: 1;
}

.qr-item-title {
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.25rem;
}

.qr-item-url {
  font-size: 0.9rem;
  color: var(--primary);
  word-break: break-all;
}

.qr-item-meta {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 0.25rem;
}

.qr-item-actions {
  display: flex;
  gap: 0.5rem;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--gray-500);
}

.empty-state svg {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1rem;
  color: var(--gray-300);
}

.empty-state p {
  margin: 0;
}

/* 通知 */
#notificationContainer {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.notification {
  background-color: white;
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 280px;
  animation: slideIn 0.3s;
}

.notification.success {
  border-left: 4px solid var(--success-color);
}

.notification.error {
  border-left: 4px solid var(--danger-color);
}

.notification-icon {
  width: 1.25rem;
  height: 1.25rem;
}

.notification.success .notification-icon {
  color: var(--success-color);
}

.notification.error .notification-icon {
  color: var(--danger-color);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOut {
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* 响应式 */
@media (max-width: 768px) {
  .login-card {
    padding: 2rem;
  }

  .navbar {
    padding: 1rem;
  }

  .navbar-brand {
    font-size: 1.25rem;
  }

  .navbar-actions {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .user-info {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
  }

  .container {
    padding: 0 1rem;
    margin: 1rem auto;
  }

  .main-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .success-message {
    padding: 1.5rem;
  }

  .success-icon {
    width: 3rem;
    height: 3rem;
  }

  .success-message h3 {
    font-size: 1.125rem;
  }

  .success-message p {
    font-size: 0.875rem;
  }

  .qr-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .qr-item-actions {
    margin-top: 0.5rem;
    width: 100%;
  }

  .qr-item-actions button {
    flex: 1;
  }
}