:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --text-color: #333;
    --background-color: #ecf0f1;
    --card-bg: #fff;
    --border-color: #ddd;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: var(--primary-color);
    color: #fff;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

h1, h2, h3 {
    margin-top: 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

.card h3 {
    margin-bottom: 10px;
    font-size: 1.2em;
    color: var(--secondary-color);
}

.card p {
    font-size: 2em;
    font-weight: bold;
    color: var(--accent-color);
    margin: 0;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--secondary-color);
    color: #fff;
    font-weight: 600;
}

tbody tr:hover {
    background-color: #f5f5f5;
}

.loading {
    text-align: center;
    color: #7f8c8d;
    font-style: italic;
}

footer {
    text-align: center;
    margin-top: 40px;
    color: #7f8c8d;
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    th, td {
        padding: 8px 10px;
        font-size: 0.9em;
    }
}