* {
    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;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
}

header h1 {
    font-size: 2em;
    margin-bottom: 20px;
}

nav {
    display: flex;
    gap: 15px;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 6px;
    transition: background 0.3s;
    font-weight: 500;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.2);
}

nav a.active {
    background: rgba(255, 255, 255, 0.3);
}

.dashboard {
    padding: 30px;
}

section {
    margin-bottom: 40px;
}

section h2 {
    font-size: 1.5em;
    margin-bottom: 20px;
    color: #333;
    border-bottom: 2px solid #667eea;
    padding-bottom: 10px;
}

section h3 {
    font-size: 1.2em;
    margin-bottom: 15px;
    color: #667eea;
}

.delete-section {
    border: 2px solid #dc3545;
    border-radius: 8px;
}

.delete-section h3 {
    color: #dc3545;
    margin-top: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.stat-card h3 {
    font-size: 1.2em;
    margin-bottom: 15px;
    color: #667eea;
    word-break: break-word;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #e0e0e0;
}

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

.stat-label {
    font-weight: 500;
    color: #666;
}

.stat-value {
    font-weight: 600;
    font-size: 1.1em;
}

.stat-success {
    color: #28a745;
}

.stat-danger {
    color: #dc3545;
}

.stat-warning {
    color: #ffc107;
}

.chart-container {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.actions-section {
    margin-top: 40px;
}

#transferActions {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.transfer-action-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.transfer-action-card h3 {
    color: #667eea;
    margin-bottom: 15px;
}

.transfer-action-card p {
    margin-bottom: 10px;
    color: #666;
}

.settings-section {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 30px;
}

.settings-section h2 {
    margin-top: 0;
}

.help-text {
    color: #666;
    margin-bottom: 20px;
    font-size: 0.9em;
}

.groups-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    padding: 8px;
    background: white;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.checkbox-label:hover {
    background: #e9ecef;
}

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

.transfer-rule {
    background: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    border: 2px solid #e0e0e0;
}

.transfer-rule h3 {
    color: #667eea;
    margin-bottom: 15px;
}

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

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

.form-group input[type="number"],
.form-group input[type="text"],
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1em;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
    color: white;
    padding: 8px 16px;
    font-size: 0.9em;
}

.btn-danger:hover {
    background: #c82333;
}

.form-actions {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #e0e0e0;
}

.alert {
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .groups-selector {
        grid-template-columns: 1fr;
    }
}