body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f2f5;
    padding: 20px;
    color: #333;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}
.container {
    max-width: 900px;
    width: 100%;
    margin: auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 20px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}
th {
    background-color: #3498db;
    color: white;
}
tr:nth-child(even) {
    background-color: #f2f2f2;
}
tr:hover {
    background-color: #ddd;
}
#chart-container {
    position: relative;
    width: 100%;
    height: 400px; /* グラフの高さをここで固定 */
    margin-top: 30px;
}
canvas {
    width: 100% !important;
    height: 100% !important;
}

#link-footer a {
    display: block;    
    margin: 4px 0;
    text-decoration: none;
  }