/* =========================================
    15. Footer (フッター)
========================================= */
.footer {
    background-color: var(--bg-surface);
    padding: 60px 20px 40px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-inner {
    max-width: 1000px;
    margin: 0 auto;
}

.footer-logo {
    margin: 0 auto 30px auto;
    display: inline-block;
}

.footer-logo a {
    display: block;
}

.footer-logo img {
    height: 36px;
    width: auto;
    margin: 0 auto;
    display: block;
    filter: grayscale(100%) opacity(0.7);
    transition: all 0.3s ease;
}

.footer-logo a:hover img {
    filter: grayscale(0%) opacity(1);
}

.footer-menu {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px 30px;
    margin-bottom: 40px;
}

.footer-menu a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
}

.footer-menu a:hover {
    color: var(--primary-orange);
}

.footer-copyright {
    color: #aaaaaa;
    font-size: 12px;
    letter-spacing: 0.1em;
}