/*ヘッダー本体*/
header {
    background-color: #000000;
    width: 100%;
    box-sizing: border-box;
    padding: 30px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .logo a {
    font-family: 'Georgia', serif;
    font-size: 24px;
    font-weight: bold;
    letter-spacing: 1px;
    color: #ffffff;
    text-decoration: none;
    font-synthesis: none;
    -webkit-font-smoothing: antialiased;
}

header nav a {
    color: #ffffff;
    text-decoration: none;
    margin-left: 25px;
    font-size: 14px;
    transition: opacity 0.3s;
}

header nav a:hover {
    opacity: 0.7;
}

/*スマホ対応*/
@media screen and (max-width: 900px) {
    header {
        padding: 20px;
        flex-direction: column;
        gap: 15px;
        text-align: center;
        width: 100%;
    }

    header .logo {
        width: 100%;
        display: flex;
        justify-content: center;
    }

    header nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px 18px;   /* ボタン同士の間隔：縦12px、横18px */
        max-width: 380px;
        margin: 0 auto;
    }

    header nav a {
        margin: 0 !important;
        white-space: nowrap;   /* 「Company Info」などの途中改行を防止 */
    }
}