@media (max-width: 900px) {


  .nav-hamburger {
    display: none;
  }

  .about-info {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .about-info .info-card--inactive {
    grid-column: 1 / -1;
  }

  .about-info .info-card:not(.info-card--inactive) {
    padding-right: 8px;
    gap: 0 6px;
  }

  .info-card-desc {
    font-size: 13px;
    line-height: 1.5;
  }

  .about-text {
    margin-top: -10px;
  }

  .about-text p {
    font-size: 14.5px;
    margin: 0px 0 20px;
    line-height: 1.8;
  }

  /* ── NAV ── */
  nav {
    padding: 0 20px;
    justify-content: flex-end;
  }

  nav.open {
    background: rgba(255, 255, 255, .97);
    backdrop-filter: blur(8px);
    border-bottom: none;
  }

  nav.scrolled {
    background: rgba(255, 255, 255, 0);
    border-bottom: none;
    backdrop-filter: none;
  }

  .nav-logo {
    display: none;
  }

  /* ── ハンバーガーボタン ── */
  .nav-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 6px;
    background: none;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
  }

  .nav-hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--black);
    border-radius: 1px;
    transition: transform .3s ease, opacity .2s ease;
    transform-origin: center;
  }

  nav.open .nav-hamburger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  nav.open .nav-hamburger span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }

  nav.open .nav-hamburger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-links {
    position: fixed;
    top: -1px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    background: rgba(255, 255, 255, .97);
    backdrop-filter: blur(8px);
    transition: max-height .35s ease, border-color .35s ease;
    border-bottom: 1px solid transparent;
    overflow-x: hidden;
  }

  nav.open .nav-links {
    max-height: 320px;
    border-bottom-color: transparent;
    padding: 30px 0;
  }

  nav.open .nav-link {
    opacity: 1;
    color: var(--black);
  }

  .nav-link {
    padding: 15px 24px;
    font-size: 14px;
    font-family: var(--font-ja);
    letter-spacing: .08em;
    border-radius: 0;
  }



  .nav-link:last-child {
    border-bottom: none;
  }

  .nav-link:hover {
    background: none;
  }

  /* ── HERO ── */
  .hero {
    padding: 0;
    background-image: url('../images/sp_topimg.png');
  }

  .hero-bg-text {
    font-size: 18vw;
  }

  .hero-scroll-hint {
    display: none;
  }

  .hero-title {
    font-size: 20px;
    white-space: nowrap;
  }

  .hero-meta {
    position: static;
    text-align: left;
    margin-top: 32px;
  }

  .hero-scroll-hint {
    display: none;
  }


  /* ── SECTION ── */
  .section {
    padding: 40px 20px;
  }

  .s-heading {
    margin-bottom: 50px;
  }


  /* ── ABOUT ── */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-aside {
    position: static;
  }

  .about-info {
    position: static;
  }

  .accordion-sub {
    font-size: 13px;
  }

  .accordion-content h4 {
    font-size: 16px;
    margin: 20px 0 8px;
  }

  .accordion-content .pledge {
    font-size: 15px;
    margin-top: 20px;
  }


  /* ── ACCORDION ── */
  .accordion-trigger {
    font-size: 16px;
  }


  /* ── NOTICE / TRADE / FC ── */
  .notice-grid,
  .trade-fees,
  .trade-rule-grid,
  .fc-grid {
    grid-template-columns: 1fr;
  }

  .fc-card h4 {
    margin-bottom: 5px;
  }


  .fc-grid .fc-card {
    padding: 10px 20px 15px;
    margin-bottom: 30px;
    width: 100%;
  }

  .fc-grid .fc-card:last-of-type {
    margin-bottom: 0px;
  }

  .fc-card p {
    font-size: 14px;
  }

  .fc-card .url {
    padding-bottom: 15px;
    margin-bottom: 15px;
  }



  /* ── SCHEDULE ── */
  .sched-row {
    grid-template-columns: auto auto 1fr;
    grid-template-rows: auto auto auto auto;
    padding-top: 8px;
  }

  .sched-date {
    grid-column: 1;
    grid-row: 1;
    padding: 0;
    font-size: 14.5px;
  }

  .sched-day {
    grid-column: 2;
    grid-row: 1;
    margin-left: 6px;
    width: 16px;
    height: 16px;
    padding-bottom: 2px;
    border: .8px solid var(--muted);
    font-weight: normal;
    transform: translateY(-1px);
  }

  .sched-city {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
    align-self: center;
    font-weight: normal;
    font-size: 11px;
  }

  .sched-venue {
    grid-column: 1 / -1;
    grid-row: 2;
    padding: 4px 0 0;
    font-size: 15px;
  }

  .sched-time {
    display: block;
    grid-column: 1 / -1;
    grid-row: 3;
    padding: 4px 0 0;
    font-size: 12px;
    color: #666;
  }

  .sched-eventer {
    grid-column: 1 / -1;
    grid-row: 4;
    padding: 3px 0 10px;
    padding-left: 0;
    font-size: 11px;
  }


  /* ── TICKET ── */
  .ticket-info {
    margin: 40px 0 10px;
  }

  .ticket-info-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 10px 0 18px;
  }

  .ticket-info-row h4 {
    margin-bottom: 10px;
  }

  .ticket-info dt {
    font-size: 13px;
    letter-spacing: .15em;
    color: #aaa;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    font-weight: normal;
  }

  .ticket-info dt::before {
    content: "";
    width: 20px;
    height: 1px;
    background-color: rgba(255, 255, 255, .2);
    display: block;
    margin-right: 12px;
  }

  .ticket-info dd {
    font-size: 14px;
    line-height: 1.7;
  }

  .ticket-info dd .generalsale {
    font-size: 16px;
  }

  .ticket-text p {
    font-size: 14px;

  }

  .ticket-tax {
    font-size: 15px;
  }

  .ticket-fc {
    padding-top: 20px;
  }

  .ticket-fc>h3 {
    font-size: 16px;
  }




  /* ── GOODS ── */
  .goods-strip-inner {
    padding: 28px 24px;
  }


  /* ── CONTACT ── */
  .contact-box {
    padding: 28px 24px;
  }

  .promoter-grid {
    grid-template-columns: 1fr 1fr;
  }

  .promoter {
    padding: 18px;
  }

  .promoter h3 {
    font-size: 13px;
    font-weight: 400;
  }

  .promoter p {
    font-size: 12.5px;
    line-height: 1.7;
  }


  /* ── MODAL ── */
  #modal-box {
    padding: 32px 24px 28px;
  }

  .modal-body {
    padding: 32px 24px 28px;
  }

  .modal-body h3 {
    font-size: 16px;
  }


  /* ── FOOTER ── */
  footer {
    padding: 24px;
  }
}


/* ──────────────────────────────────────────────
   モーション軽減
   ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  #loader {
    display: none;
  }

  .hero-eyebrow,
  .hero-title,
  .hero-sub,
  .hero-meta,
  .hero-scroll-hint,
  .reveal,
  .reveal-stagger>*,
  .sched-row {
    opacity: 1;
    transform: none;
  }
}