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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: #1a1a1a;
  color: #e0e0e0;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 2px solid #333;
}

header h1 {
  font-size: 28px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

header p {
  font-size: 14px;
  color: #888;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid #333;
}

.tab-btn {
  padding: 12px 24px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: #888;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn:hover {
  color: #fff;
}

.tab-btn.active {
  color: #4CAF50;
  border-bottom-color: #4CAF50;
}

/* Tab Content */
.tab-content {
  display: none;
  animation: fadeIn 0.3s;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.tab-content h2 {
  font-size: 22px;
  margin-bottom: 8px;
  color: #fff;
}

.section-desc {
  color: #888;
  margin-bottom: 24px;
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: #ccc;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
  width: 100%;
  padding: 10px 12px;
  background: #252525;
  border: 1px solid #333;
  border-radius: 6px;
  color: #fff;
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #4CAF50;
}

.form-group input[type="checkbox"] {
  margin-right: 8px;
  cursor: pointer;
}

/* Module Config */
.module-config {
  background: #252525;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.module-config h3 {
  font-size: 16px;
  color: #4CAF50;
  margin-bottom: 16px;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-danger {
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: #4CAF50;
  color: white;
}

.btn-primary:hover {
  background: #45a049;
}

.btn-secondary {
  background: #333;
  color: white;
  margin-right: 8px;
}

.btn-secondary:hover {
  background: #3a3a3a;
}

.btn-danger {
  background: #f44336;
  color: white;
}

.btn-danger:hover {
  background: #da190b;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: #252525;
  border-radius: 8px;
  padding: 20px;
  text-align: center;
}

.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: #4CAF50;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 13px;
  color: #888;
}

/* Data Management */
.data-actions {
  margin-bottom: 24px;
}

.data-preview {
  background: #252525;
  border-radius: 8px;
  padding: 20px;
}

.data-preview h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: #4CAF50;
}

.data-preview pre {
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 4px;
  padding: 16px;
  overflow-x: auto;
  font-size: 12px;
  color: #ccc;
  max-height: 400px;
  overflow-y: auto;
}

/* About Section */
.about-content {
  max-width: 700px;
}

.about-content h3 {
  font-size: 18px;
  color: #4CAF50;
  margin-top: 24px;
  margin-bottom: 12px;
}

.about-content p {
  margin-bottom: 12px;
  color: #ccc;
}

.about-content ul {
  margin-left: 24px;
  margin-bottom: 16px;
}

.about-content li {
  margin-bottom: 8px;
  color: #ccc;
}

.warning-text {
  color: #ff9800;
  font-weight: 600;
  font-size: 16px;
  margin-top: 24px;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #333;
  color: #666;
  font-size: 12px;
}