@media (max-width: 768px) {
    html {
        scroll-padding-top: 50px;
    }

    body.mobile-menu-open {
        overflow: hidden;
        touch-action: none;
    }

    header.pc-menu {
        position: relative;
        z-index: 1000;
    }

    .sp-menu {
        position: fixed;
        top: 0;
        right: 0;
        left: 0;
        z-index: 1000;
        display: block;
        width: 100%;
    }

    .sp-menu__bar {
        position: relative;
        z-index: 1002;
        display: flex;
        width: 100%;
        height: 50px;
        align-items: center;
        justify-content: space-between;
        box-sizing: border-box;
        padding: 0 10px 0 16px;
        border-bottom: 1px solid rgba(222, 219, 214, 0.88);
        background: rgba(255, 255, 255, 0.94);
        box-shadow: 0 6px 22px rgba(35, 31, 28, 0.055);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
    }

    .sp-logo {
        position: static;
        display: block;
        color: var(--artist-accent, #ef624f);
        font-family: "Jost", "Helvetica Neue", Arial, sans-serif;
        font-size: 17px;
        font-weight: 500;
        letter-spacing: 0.2em;
        line-height: 1;
        text-shadow: none;
    }

    .sp-logo a,
    .sp-logo a:hover {
        color: var(--artist-accent, #ef624f);
        text-decoration: none;
        opacity: 1;
    }

    .sp-menu__actions {
        display: flex;
        align-items: center;
        gap: 5px;
    }

    .sp-sns {
        position: static;
        display: flex;
        align-items: center;
        gap: 1px;
        float: none;
    }

    .sp-sns a {
        display: grid;
        width: 34px;
        height: 34px;
        margin: 0;
        padding: 0;
        place-items: center;
        border: 0;
        border-radius: 50%;
        color: #302d2a;
        font-size: 15px;
        line-height: 1;
        transition: background-color 180ms ease, color 180ms ease;
    }

    .sp-sns a:hover {
        background: #faf3ee;
        color: var(--artist-accent, #ef624f);
        opacity: 1;
    }

    .menu-icon {
        position: relative;
        top: auto;
        right: auto;
        z-index: 1003;
        display: block;
        width: 38px;
        height: 38px;
        padding: 0;
        border: 1px solid #e6dfd8;
        border-radius: 50%;
        outline: 0;
        background: #fff;
        cursor: pointer;
        box-shadow: none;
        transition: border-color 180ms ease, background-color 180ms ease;
    }

    .menu-icon:hover,
    .menu-icon:focus-visible,
    .menu-icon[aria-expanded="true"] {
        border-color: var(--artist-accent, #ef624f);
        background: #fff8f5;
    }

    .bar,
    .bar::before,
    .bar::after {
        position: absolute;
        left: 50%;
        width: 17px;
        height: 1.5px;
        border-radius: 2px;
        background: var(--artist-accent, #ef624f);
        content: "";
        transition: top 220ms ease, transform 220ms ease, opacity 160ms ease;
    }

    .bar {
        top: 50%;
        transform: translate(-50%, -50%);
    }

    .bar::before {
        top: -5px;
        transform: translateX(-50%);
    }

    .bar::after {
        top: 5px;
        transform: translateX(-50%);
    }

    .menu-icon:hover .bar,
    .menu-icon:hover .bar::before,
    .menu-icon:hover .bar::after,
    .bar--active,
    .bar--active::before,
    .bar--active::after {
        width: 17px;
        background: var(--artist-accent, #ef624f);
    }

    .bar--active {
        background: transparent;
    }

    .bar--active::before {
        top: 0;
        transform: translateX(-50%) rotate(45deg);
    }

    .bar--active::after {
        top: 0;
        width: 17px !important;
        transform: translateX(-50%) rotate(-45deg);
    }

    .overlay {
        position: fixed;
        top: 50px;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 1001;
        display: block;
        width: 100%;
        height: calc(100vh - 50px);
        height: calc(100dvh - 50px);
        overflow: hidden;
        background:
            radial-gradient(circle at 100% 0%, rgba(239, 98, 79, 0.1), transparent 38%),
            radial-gradient(circle at 0% 100%, rgba(250, 237, 226, 0.7), transparent 40%),
            rgba(255, 255, 255, 0.94);
        -webkit-backdrop-filter: blur(18px);
        backdrop-filter: blur(18px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translate3d(100%, 0, 0);
        transition: transform 440ms cubic-bezier(0.16, 1, 0.3, 1), opacity 280ms ease, visibility 0s linear 440ms;
    }

    .overlay--active {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translate3d(0, 0, 0);
        transition-delay: 0s;
    }

    .sp-menu__panel {
        width: min(620px, 100%);
        height: 100%;
        margin: 0 auto;
        padding: 26px 22px 24px;
        overflow-y: auto;
        box-sizing: border-box;
        overscroll-behavior: contain;
    }

    .sp-menu__heading {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin-bottom: 14px;
        padding-bottom: 16px;
        border-bottom: 1px solid #e9e3dd;
    }

    .sp-menu__heading p {
        margin: 0;
        color: var(--artist-accent, #ef624f);
        font-family: Georgia, "Times New Roman", serif;
        font-size: 12px;
        letter-spacing: 0.26em;
    }

    .sp-menu__heading > span {
        color: #928b85;
        font-family: Georgia, "Times New Roman", serif;
        font-size: 8px;
        letter-spacing: 0.1em;
        text-transform: uppercase;
    }

    .overlay nav {
        display: block;
        width: 100%;
        margin: 0;
    }

    .overlay .list {
        display: grid;
        width: 100%;
        margin: 0;
        padding: 0;
        text-align: left;
    }

    .overlay .links {
        position: relative;
        display: block;
        float: none;
        margin: 0;
        color: #272421;
        font-size: inherit;
        opacity: 0;
        text-align: left;
        transform: translateX(18px);
        transition: opacity 260ms ease, transform 380ms cubic-bezier(0.16, 1, 0.3, 1);
    }

    .overlay--active .links {
        opacity: 1;
        transform: translateX(0);
    }

    .overlay--active .links:nth-child(1) { transition-delay: 80ms; }
    .overlay--active .links:nth-child(2) { transition-delay: 110ms; }
    .overlay--active .links:nth-child(3) { transition-delay: 140ms; }
    .overlay--active .links:nth-child(4) { transition-delay: 170ms; }
    .overlay--active .links:nth-child(5) { transition-delay: 200ms; }
    .overlay--active .links:nth-child(6) { transition-delay: 230ms; }
    .overlay--active .links:nth-child(7) { transition-delay: 260ms; }

    .overlay .links::after,
    .overlay nav li::after {
        display: none;
    }

    .overlay .links a {
        display: grid;
        min-height: 58px;
        grid-template-columns: minmax(0, 1fr) auto 18px;
        gap: 10px;
        align-items: center;
        box-sizing: border-box;
        padding: 0 4px;
        border-bottom: 1px solid #e7e1db;
        color: #292623;
        font-family: Georgia, "Times New Roman", serif;
        font-size: 15px;
        line-height: 1;
        text-decoration: none;
        transition: color 180ms ease, padding 220ms ease, background-color 180ms ease;
    }

    .overlay .links a:hover,
    .overlay .links a:focus-visible {
        padding-left: 10px;
        background: rgba(239, 98, 79, 0.045);
        color: var(--artist-accent, #ef624f);
        opacity: 1;
    }

    .overlay .links strong {
        font-size: 15px;
        font-weight: 400;
        letter-spacing: 0.12em;
    }

    .overlay .links small {
        color: #97908a;
        font-family: "Noto Sans JP", sans-serif;
        font-size: 9px;
        letter-spacing: 0.08em;
    }

    .overlay .links i {
        color: #aaa39d;
        font-size: 11px;
        transition: color 180ms ease, transform 220ms ease;
    }

    .overlay .links a:hover i,
    .overlay .links a:focus-visible i {
        color: var(--artist-accent, #ef624f);
        transform: translateX(3px);
    }

    .overlay .links.is-current a {
        color: var(--artist-accent, #ef624f);
    }

    .overlay .links.is-current a::before {
        position: absolute;
        top: 50%;
        left: -22px;
        width: 2px;
        height: 28px;
        border-radius: 2px;
        background: var(--artist-accent, #ef624f);
        content: "";
        transform: translateY(-50%);
    }

    .sp-menu__footer {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin-top: 24px;
    }

    .sp-menu__footer p {
        margin: 0;
        color: var(--artist-accent, #ef624f);
        font-family: "Jost", "Helvetica Neue", Arial, sans-serif;
        font-size: 12px;
        letter-spacing: 0.2em;
    }

    .sp-menu__footer span {
        color: #a19a94;
        font-family: Georgia, "Times New Roman", serif;
        font-size: 7px;
        letter-spacing: 0.12em;
    }
}

@media (max-width: 360px) {
    .sp-sns {
        display: none;
    }

    .overlay .links a {
        grid-template-columns: minmax(0, 1fr) auto 16px;
    }
}

@media (prefers-reduced-motion: reduce) and (max-width: 768px) {
    .overlay,
    .overlay .links,
    .menu-icon,
    .bar,
    .bar::before,
    .bar::after {
        transition: none !important;
    }
}