/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
}

/* 登录页面 */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.auth-box {
  background: white;
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.auth-box h1 {
  text-align: center;
  color: #333;
  margin-bottom: 30px;
  font-size: 28px;
}

.auth-box .subtitle {
  text-align: center;
  color: #666;
  margin-bottom: 30px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #333;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
}

.btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: #f5f5f5;
  color: #333;
  margin-top: 10px;
}

.btn-secondary:hover {
  background: #e0e0e0;
}

.error-message {
  background: #ffebee;
  color: #c62828;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  text-align: center;
  display: none;
}

.error-message.show {
  display: block;
}

/* 聊天页面 */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 600px;
  margin: 0 auto;
  background: #f5f5f5;
}

.chat-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-header h1 {
  font-size: 18px;
  font-weight: 600;
}

.chat-header .actions {
  display: flex;
  gap: 10px;
}

.chat-header .actions button {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

.chat-header .actions button:hover {
  background: rgba(255, 255, 255, 0.3);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: 16px;
  word-wrap: break-word;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.user {
  align-self: flex-end;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-bottom-right-radius: 4px;
}

.message.assistant {
  align-self: flex-start;
  background: white;
  color: #333;
  border-bottom-left-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.message.sticker {
  background: transparent;
  padding: 8px;
  font-size: 48px;
  box-shadow: none;
}

.message img {
  max-width: 200px;
  border-radius: 8px;
}

.typing-indicator {
  align-self: flex-start;
  background: white;
  padding: 12px 16px;
  border-radius: 16px;
  border-bottom-left-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: none;
}

.typing-indicator.show {
  display: block;
}

.typing-indicator span {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #999;
  border-radius: 50%;
  margin: 0 2px;
  animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-4px);
  }
}

.chat-input-area {
  background: white;
  padding: 16px;
  border-top: 1px solid #e0e0e0;
}

.chat-input-wrapper {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.chat-input-wrapper input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 24px;
  font-size: 16px;
  outline: none;
}

.chat-input-wrapper input:focus {
  border-color: #667eea;
}

.chat-input-wrapper button {
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 20px;
  cursor: pointer;
  transition: transform 0.2s;
}

.chat-input-wrapper button:hover {
  transform: scale(1.05);
}

.sticker-btn {
  background: #f5f5f5 !important;
  color: #333 !important;
}

.sticker-picker {
  display: none;
  padding: 10px;
  background: white;
  border-top: 1px solid #e0e0e0;
  max-height: 200px;
  overflow-y: auto;
}

.sticker-picker.show {
  display: block;
}

.sticker-picker .stickers {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sticker-picker .sticker {
  font-size: 28px;
  cursor: pointer;
  padding: 4px;
  border-radius: 8px;
  transition: background 0.2s;
}

.sticker-picker .sticker:hover {
  background: #f0f0f0;
}

/* 管理后台 */
.admin-container {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 250px;
  background: #1a1a2e;
  color: white;
  padding: 20px 0;
}

.admin-sidebar h1 {
  padding: 0 20px 20px;
  font-size: 20px;
  border-bottom: 1px solid #333;
}

.admin-sidebar nav {
  padding: 20px 0;
}

.admin-sidebar nav a {
  display: block;
  padding: 12px 20px;
  color: #aaa;
  text-decoration: none;
  transition: all 0.3s;
}

.admin-sidebar nav a:hover,
.admin-sidebar nav a.active {
  background: #333;
  color: white;
}

.admin-content {
  flex: 1;
  background: #f5f5f5;
  padding: 30px;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.admin-header h2 {
  color: #333;
  font-size: 24px;
}

.admin-card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.admin-card h3 {
  color: #333;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid #e0e0e0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.stat-card .number {
  font-size: 36px;
  font-weight: 700;
  color: #667eea;
}

.stat-card .label {
  color: #666;
  margin-top: 8px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #e0e0e0;
}

.admin-table th {
  background: #f5f5f5;
  font-weight: 600;
  color: #333;
}

.admin-table tr:hover {
  background: #f9f9f9;
}

.admin-table .actions button {
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-right: 8px;
  font-size: 12px;
}

.admin-table .actions .view-btn {
  background: #e3f2fd;
  color: #1976d2;
}

.admin-table .actions .delete-btn {
  background: #ffebee;
  color: #c62828;
}

/* 管理后台登录 */
.admin-login {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #1a1a2e;
}

.admin-login-box {
  background: white;
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

.admin-login-box h1 {
  text-align: center;
  color: #333;
  margin-bottom: 30px;
}

/* 响应式 */
@media (max-width: 768px) {
  .admin-container {
    flex-direction: column;
  }

  .admin-sidebar {
    width: 100%;
  }

  .admin-sidebar nav {
    display: flex;
    overflow-x: auto;
    padding: 10px;
  }

  .admin-sidebar nav a {
    white-space: nowrap;
  }

  .chat-container {
    max-width: 100%;
  }

  .message {
    max-width: 90%;
  }
}