body { font-family: sans-serif; padding: 30px; }
.container {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}
.box {
    border: 1px solid #999;
    padding: 20px;
    width: 320px;
    height: 600px; /* 固定高さで統一 */
    box-sizing: border-box;
}
.box.scrollable {
    overflow-y: auto; /* 縦スクロール */
}
label, input, select {
    display: block;
    margin-bottom: 20px;
    width: 100%;
}
.status {
    margin: 20px 0;
    padding: 10px;
    background-color: #eef;
}
button {
    width: 48%;
    margin-right: 2%;
}
button:last-child {
    margin-right: 0;
}
table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 10px;
}
th, td {
    border: 1px solid #999;
    padding: 8px;
    text-align: center;
}
th {
    background-color: #eef;
}
input[type=text] {
    width: 120px;
}
.error {
    color: red;
    margin-bottom: 10px;
}