body {
    font-family: 'Noto Sans KR', sans-serif;
    background: #f4f4f4;
    padding: 30px;
    margin: 0;
}

h2 {
    text-align: center;
    margin-bottom: 40px;
    color: #333;
}

.space-table {
    margin-bottom: 60px;
    background: #fff;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    padding: 20px;
    border-radius: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    border: 1px solid #ccc;
    padding: 12px 8px;
    text-align: center;
    vertical-align: middle;
}

th {
    background-color: #007bff;
    color: white;
    font-weight: 500;
}

.time-cell {
    background: #f8f8f8;
    font-weight: bold;
    width: 120px;
}

.empty-cell {
    background: #f8f8f8;
    color: #999;
}

.merged-cell {
    vertical-align: middle;
}

.error-message {
    text-align: center;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    color: #dc3545;
    margin: 20px auto;
    max-width: 600px;
}

@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    
    .space-table {
        padding: 10px;
        margin-bottom: 30px;
    }
    
    th, td {
        padding: 8px 4px;
        font-size: 14px;
    }
    
    .time-cell {
        width: 90px;
    }
}