/* トップナビゲーション */
.top-nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    background: rgba(100, 90, 80, 0.6);
    backdrop-filter: blur(20px);
    border-radius: 50px;
/* トップナビゲーション */
.top-nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    background: rgba(100, 90, 80, 0.6);
    backdrop-filter: blur(20px);
    border-radius: 50px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    max-width: 90%;
    width: auto;
}

.nav-button {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    padding: 8px 16px;
    border-radius: 30px;
    transition: background 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.nav-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.nav-url {
    background: rgba(255, 255, 255, 0.05);
    padding: 12px 40px;
    border-radius: 30px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    font-weight: 500;
    white-space: nowrap;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    text-decoration: none;
    display: block;
    transition: background 0.3s ease;
}

.nav-url:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ヘッダーの下に余白を確保 */
body {
    padding-top: 100px;
}

main {
    position: relative;
    z-index: 1;
}

/* レスポンシブ対応 */
@media (max-width: 1024px) {
    .top-nav {
        gap: 15px;
        padding: 10px 15px;
    }

    .nav-url {
        padding: 10px 30px;
        font-size: 16px;
    }

    .nav-button {
        font-size: 16px;
        padding: 6px 12px;
    }
}

@media (max-width: 768px) {
    .top-nav {
        top: 15px;
        gap: 10px;
        padding: 8px 12px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-url {
        padding: 8px 20px;
        font-size: 14px;
    }

    .nav-button {
        font-size: 14px;
        padding: 6px 10px;
    }

    body {
        padding-top: 80px;
    }
}

@media (max-width: 480px) {
    .top-nav {
        top: 10px;
        gap: 8px;
        padding: 6px 10px;
        border-radius: 30px;
    }

    .nav-url {
        padding: 6px 15px;
        font-size: 12px;
        order: 3;
        flex-basis: 100%;
        text-align: center;
    }

    .nav-button {
        font-size: 12px;
        padding: 5px 8px;
    }

    body {
        padding-top: 90px;
    }
}