@media (max-width: 900px) {
    .main-title-ja {
        font-size: 1.65rem;
    }

    .main-title-en {
        font-size: 0.92rem;
        margin-left: 0.2rem;

    }
}

@media (max-width: 834px) {
    .chart-section .chart-area {
        /*width: 96%;*/
    }

    .responsive-table th:first-child,
    .responsive-table td:first-child {
        font-size: 0.85rem;
        width: 9rem;
    }

    .responsive-table thead th {
        position: relative;
        height: 3.6rem;
        padding: 0.5rem 0.3rem;
        white-space: nowrap;
        vertical-align: bottom;
    }

    .responsive-table thead th span {
        display: inline-block;
        transform: rotate(-45deg);
        transform-origin: bottom left;
        font-size: 0.95rem;
        line-height: 1.1;
        overflow: visible;
        color: #4b5563;
    }

    /* Week列だけ回転させない（1列目） */
    .responsive-table thead th:first-child span {
        transform: none;
        font-weight: 700;
        font-size: 1rem;
    }
}




@media (max-width: 700px) {
    .main-title-ja {
        font-size: 1.1rem;
    }

    .main-title-en {
        font-size: 0.98rem;
    }


}

@media (max-width: 600px) {
    html {
        font-size: 60%; /* 全体縮小 */
    }

    body {
        width: auto;
        overflow-x: hidden;
    }

    .header-logo {
        width: 48px;
        height: 48px;
    }

    .chart-section .chart-area {
        /*width: 95%;*/
    }

    .card {
        padding: 1.4rem 0.8rem 1rem 0.8rem;
    }

    .header-card .update-meta {
        padding: 0 0.6rem;
        width: 96%;
    }

    .responsive-table th:first-child,
    .responsive-table td:first-child {
        width: 8rem;
    }
}