* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --error-color: #ef4444;
  --background: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 2rem 1rem;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

header {
  text-align: center;
  color: white;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
}

.card {
  background: var(--card-bg);
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-lg);
}

/* 标签页 */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  padding: 1rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s;
}

.tab-btn:hover {
  color: var(--primary-color);
  background: rgba(99, 102, 241, 0.05);
}

.tab-btn.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* 标签内容 */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s;
}

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

.tab-content h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.description {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.6;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* 按钮 */
.btn {
  width: 100%;
  padding: 1rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background: #475569;
}

.btn-small {
  width: auto;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-icon {
  font-size: 1.25rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* 成功状态 */
.success-state {
  text-align: center;
  padding: 2rem;
}

.success-state.hidden {
  display: none;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: var(--success-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  margin: 0 auto 1.5rem;
  animation: scaleIn 0.5s;
}

@keyframes scaleIn {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

.success-state h2 {
  color: var(--success-color);
  margin-bottom: 1rem;
}

.success-state p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* 调试信息 */
.debug-card, .log-card {
  background: #f8fafc;
}

.debug-card h3, .log-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.debug-info {
  background: white;
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
  border-bottom: none;
}

.user-list {
  margin-top: 1rem;
  padding: 1rem;
  background: #f1f5f9;
  border-radius: 0.5rem;
  max-height: 200px;
  overflow-y: auto;
}

.user-item {
  padding: 0.5rem;
  background: white;
  margin-bottom: 0.5rem;
  border-radius: 0.25rem;
  border-left: 3px solid var(--primary-color);
}

.user-item:last-child {
  margin-bottom: 0;
}

/* 日志 */
.log-container {
  background: #1e293b;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 0.5rem;
  max-height: 300px;
  overflow-y: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.log-entry {
  margin-bottom: 0.5rem;
  padding: 0.25rem 0;
}

.log-time {
  color: #94a3b8;
  margin-right: 0.5rem;
}

.log-type-info { color: #60a5fa; }
.log-type-success { color: #34d399; }
.log-type-error { color: #f87171; }
.log-type-warning { color: #fbbf24; }

/* 页脚 */
footer {
  text-align: center;
  color: white;
  margin-top: 2rem;
  opacity: 0.9;
}

footer a {
  color: white;
  text-decoration: underline;
}

/* 响应式 */
@media (max-width: 640px) {
  header h1 {
    font-size: 2rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .tab-btn {
    padding: 0.75rem;
    font-size: 0.875rem;
  }
}