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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: rgb(62, 62, 62);
    margin-bottom: 30px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.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;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
}

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

.group-name-input {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.group-name-input label {
    min-width: 80px;
    margin-bottom: 0;
    margin-right: 10px;
    font-size: 14px;
}

.group-name-input input {
    flex: 1;
    padding: 8px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-right: 10px;
    margin-bottom: 10px;
}

.btn-primary {
    background: #6f66ea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
}

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-success:hover {
    background: #229954;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.hidden {
    display: none;
}

.actions {
    margin-top: 20px;
}

.grid-preview {
    overflow-x: auto;
    margin-top: 20px;
}

.grid-table {
    border-collapse: collapse;
    margin: 20px auto;
    background: white;
}

.grid-table td {
    width: 40px;
    height: 40px;
    border: 1px solid #333;
    text-align: center;
    font-weight: bold;
    font-size: 12px;
}

.grid-table td.header {
    background: #e8e8e8;
    color: #666;
}

.grid-table td.corner {
    background: #d0d0d0;
}

.success-message {
    background: #d4edda;
    border: 2px solid #28a745;
    color: #155724;
    padding: 15px;
    border-radius: 8px;
    margin-top: 20px;
}

@media print {
    body {
        background: white;
        padding: 0;
    }
    
    .no-print {
        display: none !important;
    }

    .card {
        box-shadow: none;
        page-break-after: always;
    }

    /* Force colors to print */
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }

    .grid-table td {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
}