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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

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

.content {
    padding: 40px;
}

.form-section {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
}

.form-section h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

input[type="text"], input[type="number"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus, input[type="number"]:focus {
    outline: none;
    border-color: #4facfe;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

.btn {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(79, 172, 254, 0.3);
}

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

.clients-list {
    background: white;
    border-radius: 10px;
    padding: 30px;
    border: 1px solid #e1e5e9;
}

.clients-list h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.client-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border: 1px solid #e1e5e9;
    border-radius: 8px;
    margin-bottom: 10px;
    background: #f8f9fa;
}

.client-info {
    flex: 1;
}

.client-name {
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.client-id {
    color: #666;
    font-size: 0.9rem;
}

.folder-id {
    color: #4facfe;
    font-weight: 600;
    margin-left: 20px;
}

.no-folder {
    color: #dc3545;
    font-style: italic;
}

.loading {
    text-align: center;
    padding: 20px;
    color: #666;
}

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #f5c6cb;
}

.success {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #c3e6cb;
}

.refresh-btn {
    background: #28a745;
    margin-left: 10px;
}

.refresh-btn:hover {
    box-shadow: 0 10px 20px rgba(40, 167, 69, 0.3);
}