/* フッター */
footer {
    background: #000;
    color: white;
    padding: 0;
}

/* コンタクトセクション */
.contact {
    text-align: center;
    padding: 4rem;
}

.contact-info {
    margin: 2rem 0;
}

.mail-link {
    color: white;
    margin-top: 0.5em;
}

.mail-link::before {
    font-family: "Font Awesome 6 Free";
    content: '\f0e0';
    color: white;
    margin-right: 0.5em;
    font-size: 1.2em;
    transition: transform 0.3s;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 4rem;
    border-top: 1px solid white;
}

.footer-logo {
    display: flex;
    align-items: center;

    & a {
        display: flex;
        align-items: center;
        padding: 0.5rem 0;
        transition: background 0.3s ease, color 0.3s ease;
    }

    & img {
        height: 30px;
    }
}

.footer-logo a:hover {
    background: white;
    color: black;
    & img {
        filter: invert(1);
    }
}

/* タブレット用レスポンシブ対応 */
@media (max-width: 820px) {
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* スマートフォン用レスポンシブ対応 */
@media (max-width: 480px) {
    .contact {
        padding: 2rem 1rem;
    }

    .footer-content {
        padding: 0 1rem;
        gap: 0;
    }
}