/* ベーススタイル */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem 0.5rem;
    text-align: center;
}

header h1 {
    margin: 0;
    display: inline-block;
}

header h1 a {
    display: inline-block;
    text-decoration: none;
}

header h1 img {
    display: block;
    width: auto;
    height: 50px; /* ロゴの高さを調整 */
    max-width: 100%;
}


nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 10px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

main {
    padding: 1rem;
}

section {
    margin-bottom: 2rem;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: #f9f9f9;
}

h2 {
    font-size: 1.3rem;
    margin-top: 0;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 5px 0;
    }

    header h1 {
        font-size: 1.2rem;
    }

    h2 {
        font-size: 1.2rem;
    }

    section {
        padding: 0.8rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1rem;
    }

    nav ul {
        flex-direction: column;
        padding: 0;
    }

    nav ul li {
        margin: 5px 0;
    }

    main {
        padding: 0.5rem;
    }

    section {
        margin-bottom: 1.5rem;
    }

    h2 {
        font-size: 1rem;
    }
}



@media (max-width: 768px) {
    header h1 img {
        height: 40px; /* スマホ用に少し小さく */
    }
}

@media (max-width: 480px) {
    header h1 img {
        height: 30px; /* 更に小さく */
    }
}

header h1 img {
    height: 50px;
    width: auto;
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    header h1 img {
        content: url('logo@2x.png');
    }
}





/* ハンバーガーメニュー */
#nav-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    #nav-toggle {
        display: block;
        position: absolute;
        top: 10px;
        right: 10px;
    }

    nav ul {
        display: none;
        flex-direction: column;
        background: #333;
        width: 100%;
        text-align: center;
        position: absolute;
        top: 50px;
        left: 0;
        z-index: 1000;
    }

    nav ul.visible {
        display: flex;
    }

    nav ul li {
        margin: 10px 0;
    }
}