/* ============================================================
   Leathers Day 2026 LP（SP）
   /features/leathersday2026/
   トーン：冷たいコンクリートグレーを地色に、黒ブロックを全幅で交互に差し込む
   黒ブロック：Message / Web Pre-Sale / Photo Booth / Related ＝ .sec--dark
   ※NH.com 標準の白背景ガイドラインからは意図的に外している（イベント特設のため）
============================================================ */

#main {
  --paper: #d7d6d4;
  --panel: rgba(255, 255, 255, 0.42);
  --black: #0e0e0e;
  --card: #101010;
  --card-on-dark: #191919;
  --ink: #1b1b1b;
  --ink-sub: #5c5e5f;
  --line: rgba(0, 0, 0, 0.26);
  --ink-d: #ececec;
  --ink-sub-d: rgba(255, 255, 255, 0.62);
  --line-d: rgba(255, 255, 255, 0.2);
  --ld-red: #660000;
  --ld-red-lit: #a52a2a;
  --mars-brown: #812e00;
  --smoked-brown: #624d4f;
  --wine: #6e1f2a;
  --mexican-brown: #a8481c; /* メキシカンブラウン＝新色 */
  /* タイプスケールは leathersday2025 準拠（本文 16→18px 可変・行間1.85） */
  --fs-base: clamp(16px, calc(14.4375px + 0.446vw), 18px);
  background: var(--paper);
  color: var(--ink);
  font-size: var(--fs-base);
  line-height: 1.85;
  letter-spacing: 0.05em;
  -webkit-font-smoothing: antialiased;
}

#main .serif {
  font-family: "EB Garamond", "游明朝", YuMincho,
    "ヒラギノ明朝 ProN W3", "Hiragino Mincho ProN",
    "Sawarabi Mincho", "HG明朝E", "ＭＳ Ｐ明朝", "ＭＳ 明朝", serif;
  font-weight: normal;
}

#main section { padding: 72px 0; }
#main #hero { padding: 0; }

#main .sec--dark {
  background: var(--black);
  color: var(--ink-d);
}

#main .content-area {
  margin: 0 auto;
  padding: 0 22px;
  max-width: 1100px;
}
#main .content-area.narrow { max-width: 760px; }

#main a { color: inherit; }

/* ============================================================
   セクション見出し（全セクション共通・左寄せ）
============================================================ */
#main .sec-head {
  margin-bottom: 40px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
#main .sec--dark .sec-head { border-bottom-color: var(--line-d); }

#main .sec-head h2 {
  position: relative;
  padding-left: 20px;
  font-size: 3.2rem;
  font-weight: normal;
  text-align: left;
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: #0b0b0b;
}
#main .sec--dark .sec-head h2 { color: #fff; }
#main .sec-head h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.1em;
  bottom: 0.14em;
  width: 4px;
  background: var(--ld-red);
}
#main .sec-sub {
  margin-top: 10px;
  padding-left: 20px;
  font-size: 1.4rem;
  letter-spacing: 0.25rem;
  color: var(--ink-sub);
}
#main .sec--dark .sec-sub { color: var(--ink-sub-d); }

#main h3 {
  font-size: 2.2rem;
  font-weight: normal;
  letter-spacing: 0.05rem;
  color: #0b0b0b;
}
#main .sec--dark h3 { color: #fff; }

#main .lead {
  line-height: 1.95;
  letter-spacing: 0.05rem;
}
#main .lead + .lead { margin-top: 28px; }

#main .note {
  font-size: 1.4rem;
  color: var(--ink-sub);
  letter-spacing: 0.1rem;
}
#main .sec--dark .note { color: var(--ink-sub-d); }

/* --- 写真プレースホルダー --- */
#main .photo-placeholder {
  background: #c6c5c3;
  border: 1px dashed rgba(0, 0, 0, 0.32);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--ink-sub);
  font-size: 1.4rem;
  letter-spacing: 0.1rem;
  line-height: 1.85;
  padding: 0 16px;
}
#main .item-card .photo-placeholder,
#main .sec--dark .photo-placeholder {
  background: #1c1c1c;
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--ink-sub-d);
}

/* ============================================================
   LDボタン
============================================================ */
#main .ld-button {
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  max-width: 400px;
  height: 56px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  background: var(--ld-red);
  color: #fff;
  text-decoration: none;
  font-size: 1.7rem;
  letter-spacing: 0.1rem;
}
#main .ld-button::before {
  content: "\25B6";
  font-size: 1rem;
}

/* ============================================================
   1. HERO（全幅フルブリードの写真にタイトルを重ねる）
   SPは縦クロップ。文字は下部の黒いレザー面に重ねるので黒グラデーションは下から
============================================================ */
#hero .hero-media {
  position: relative;
  width: 100%;
  height: min(126vw, 86vh);
  min-height: 420px;
  overflow: hidden;
}
#hero .hero-media picture,
#hero .hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  display: block;
}
#hero .hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.82) 0%, rgba(0, 0, 0, 0.45) 26%, rgba(0, 0, 0, 0) 56%);
}
#hero .hero-text {
  position: absolute;
  z-index: 1;
  left: 22px;
  right: 22px;
  bottom: 36px;
  padding-top: 20px;
  text-align: left;
  color: #fff;
}
#hero .hero-text::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--ld-red);
}
#hero h1 {
  font-size: 3.2rem;
  font-weight: normal;
  text-align: left;
  letter-spacing: 0.1rem;
  line-height: 1.3;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.6);
}
#hero .hero-date {
  margin-top: 16px;
  font-size: 1.9rem;
  letter-spacing: 0.1rem;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.6);
}
#hero .hero-venue {
  margin-top: 10px;
  font-size: 1.4rem;
  line-height: 1.8;
  letter-spacing: 0.05rem;
  color: rgba(255, 255, 255, 0.78);
}

/* ============================================================
   2. Message＝看板（黒地に打ち付けたコンクリート板）
============================================================ */
#about .signboard {
  background: #cfcdc9;
  border: 5px solid #000;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.14);
}
#about .signboard-label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  background: var(--ld-red);
  color: #fff;
}
#about .signboard-en {
  font-size: 2.6rem;
  line-height: 1.1;
}
#about .signboard-jp {
  font-size: 1.3rem;
  letter-spacing: 0.25rem;
  color: rgba(255, 255, 255, 0.82);
}
#about .signboard-body {
  padding: 34px 22px 38px;
  color: #111;
  border-top: 1px solid rgba(0, 0, 0, 0.35);
  background-image:
    radial-gradient(circle closest-side, #6f6d69 96%, transparent 100%),
    radial-gradient(circle closest-side, #6f6d69 96%, transparent 100%),
    radial-gradient(circle closest-side, #6f6d69 96%, transparent 100%),
    radial-gradient(circle closest-side, #6f6d69 96%, transparent 100%);
  background-size: 9px 9px, 9px 9px, 9px 9px, 9px 9px;
  background-position:
    left 10px top 10px,
    right 10px top 10px,
    left 10px bottom 10px,
    right 10px bottom 10px;
  background-repeat: no-repeat, no-repeat, no-repeat, no-repeat;
}
#about .signboard-body p {
  line-height: 1.95;
  letter-spacing: 0.05em;
}
#about .signboard-body p + p { margin-top: 24px; }

/* ============================================================
   ページ内ナビ（5カテゴリ・2段グリッド・HERO から続けて黒地）
============================================================ */
#page-nav {
  padding: 0;
  background: var(--black);
  color: var(--ink-d);
}
#page-nav ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  padding: 20px 22px;
}
#page-nav li:first-child { grid-column: 1 / -1; }
#page-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  font-size: 1.5rem;
  line-height: 1.6;
  letter-spacing: 0;
  text-align: center;
  white-space: nowrap;
  color: var(--ink-d);
  text-decoration: none;
}

/* ============================================================
   商品カード（黒ベタで押す）
============================================================ */
#main .item-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 36px;
}
#main .item-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 16px 24px;
  background: var(--card);
  color: var(--ink-d);
  text-align: center;
}
#main .sec--dark .item-card {
  background: var(--card-on-dark);
  border: 1px solid var(--line-d);
}
#main .item-photo {
  width: 100%;
  aspect-ratio: 5 / 4;
  margin-bottom: 20px;
}
#main .item-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
#main .item-code {
  font-size: 2rem;
  letter-spacing: 0.1rem;
  color: #fff;
}
#main .item-name {
  margin-top: 8px;
  font-size: 1.5rem;
  color: var(--ink-sub-d);
}
#main .item-price {
  margin-top: 14px;
  padding-top: 14px;
  width: 100%;
  border-top: 1px solid var(--line-d);
  font-size: 2.4rem;
  color: #fff;
}
#main .item-tax {
  font-size: 1.3rem;
  color: var(--ink-sub-d);
}

#main .swatch {
  display: inline-block;
  width: 24px;
  height: 10px;
  margin-left: 10px;
  vertical-align: middle;
}
#main .swatch--mars { background: var(--mars-brown); }
#main .swatch--smoked { background: var(--smoked-brown); }
#main .swatch--wine { background: var(--wine); }
#main .swatch--mexican { background: var(--mexican-brown); }

/* ============================================================
   4. 先行販売アイテム（黒ブロック）
============================================================ */
#web-first .web-first-status {
  margin-top: 32px;
  text-align: center;
  font-size: 1.5rem;
  letter-spacing: 0.1rem;
  color: var(--ink-d);
}
#web-first .note { text-align: center; }

/* ============================================================
   5. 会場販売アイテム（コンクリート地）
============================================================ */
#limited .limited-group {
  padding: 36px 18px 44px;
  background: var(--panel);
  border: 1px solid var(--line);
}
#limited .limited-group + .limited-group { margin-top: 40px; }
#limited .limited-label {
  font-size: 1.5rem;
  font-style: italic;
  letter-spacing: 0.2rem;
  text-align: center;
  color: var(--ld-red);
}
#limited h3 {
  margin-top: 10px;
  font-size: 2rem;
  text-align: center;
  line-height: 1.6;
}
#limited .limited-lead {
  margin-top: 22px;
  font-size: 1.7rem;
  line-height: 1.9;
  text-align: left;
}
#limited .limited-lead br { display: none; }
/* --------------------------------------------------------
   ロゴ入り3色の写真切替（JavaScript不使用）
   ラジオを視覚的に隠し、カラー名のラベルを押して :checked で写真を差し替える
-------------------------------------------------------- */
#limited .swap-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}
#limited .swap-stage {
  position: relative;
  max-width: 760px;
  margin: 28px auto 0;
  aspect-ratio: 1200 / 1084;   /* 集合写真の比率。寄りカットは左右がわずかに切れる */
  background: var(--card);
  overflow: hidden;
}
#limited .swap-shot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 320ms ease;
}
#ld-color-all:checked ~ .swap-stage .shot-all,
#ld-color-mars:checked ~ .swap-stage .shot-mars,
#ld-color-wine:checked ~ .swap-stage .shot-wine,
#ld-color-mex:checked ~ .swap-stage .shot-mex {
  opacity: 1;
}
#limited .item-card label {
  display: block;
  cursor: pointer;
}
#limited .item-list--3 .item-card {
  transition: background-color 250ms ease, box-shadow 250ms ease;
}
#limited .item-list--3 .item-card:hover {
  background: #1c1c1c;
}
/* 選択中のカラーを赤い枠で示す */
#ld-color-mars:checked ~ .item-list .card-mars,
#ld-color-wine:checked ~ .item-list .card-wine,
#ld-color-mex:checked ~ .item-list .card-mex {
  background: #1c1c1c;
  box-shadow: inset 0 0 0 2px rgba(165, 42, 42, 0.95);
}
/* キーボード操作時のフォーカス表示 */
#ld-color-mars:focus-visible ~ .item-list .card-mars,
#ld-color-wine:focus-visible ~ .item-list .card-wine,
#ld-color-mex:focus-visible ~ .item-list .card-mex,
#ld-color-all:focus-visible ~ .swap-reset label {
  outline: 2px solid var(--ld-red-lit);
  outline-offset: 2px;
}
#limited .swap-reset {
  margin-top: 14px;
  text-align: center;
  font-size: 1.3rem;
}
#limited .swap-reset label {
  cursor: pointer;
  color: var(--ink-sub);
  text-decoration: underline;
  text-underline-offset: 4px;
}
#ld-color-all:checked ~ .swap-reset {
  visibility: hidden;   /* 3色を表示中は不要。高さは残して行送りを揺らさない */
}
@media (prefers-reduced-motion: reduce) {
  #limited .swap-shot,
  #limited .item-list--3 .item-card { transition: none; }
}
#limited .item-name {
  margin-top: 0;
  font-size: 2rem;
  letter-spacing: 0.05rem;
  color: #fff;
}
/* 5a＝集合写真1枚に集約したので、カードはカラー名とスウォッチだけの帯にする */
#limited .item-list--3 {
  gap: 12px;
  margin-top: 20px;
}
#limited .item-list--3 .item-card {
  padding: 16px 12px;
}
#limited .limited-price {
  margin-top: 24px;
  font-size: 2.4rem;
  text-align: center;
}
#limited .limited-tax {
  margin-left: 4px;
  font-size: 1.3rem;
  color: var(--ink-sub);
}
#limited .limited-note {
  margin-top: 26px;
  font-size: 1.4rem;
  line-height: 1.85;
  color: var(--ink-sub);
  text-align: left;
}
#limited .limited-note a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* ============================================================
   6. フォトブース（黒ブロック）
============================================================ */
#booth .booth-block {
  display: flex;
  flex-direction: column;
}
#booth .booth-photo {
  margin-bottom: 32px;
}

/* --------------------------------------------------------
   額装（PC版と同じ考え方。SPは枠・ボルトとも一段細く小さく）
-------------------------------------------------------- */
#booth .booth-photo,
#booth .booth-photos li {
  box-sizing: border-box;
  position: relative;
  padding: 7px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: linear-gradient(135deg,
      #292929 0%, #111 28%, #383838 50%, #121212 72%, #292929 100%);
  box-shadow:
    0 8px 16px rgba(0, 0, 0, 0.5),
    inset 0 0 0 1px rgba(0, 0, 0, 0.9);
}
#booth .booth-photo::before,
#booth .booth-photos li::before {
  content: "";
  position: absolute;
  inset: 2px;
  z-index: 2;
  pointer-events: none;
  background:
    radial-gradient(circle at 5px 5px,
      #080808 0 1.5px, rgba(255, 255, 255, 0.42) 2px 2.5px, #151515 3px 3.5px, transparent 4px),
    radial-gradient(circle at calc(100% - 5px) 5px,
      #080808 0 1.5px, rgba(255, 255, 255, 0.42) 2px 2.5px, #151515 3px 3.5px, transparent 4px),
    radial-gradient(circle at 5px calc(100% - 5px),
      #080808 0 1.5px, rgba(255, 255, 255, 0.42) 2px 2.5px, #151515 3px 3.5px, transparent 4px),
    radial-gradient(circle at calc(100% - 5px) calc(100% - 5px),
      #080808 0 1.5px, rgba(255, 255, 255, 0.42) 2px 2.5px, #151515 3px 3.5px, transparent 4px);
}
#booth .booth-photo::after,
#booth .booth-photos li::after {
  content: "";
  position: absolute;
  inset: 6px;
  z-index: 2;
  border: 1px solid rgba(165, 42, 42, 0.72);
  pointer-events: none;
}
#booth .booth-photo img,
#booth .booth-photos li img {
  width: 100%;
  display: block;
  box-sizing: border-box;
  border: 1px solid rgba(0, 0, 0, 0.9);
}
#booth .booth-photo img { height: auto; }
#booth .booth-text h3 { margin-bottom: 20px; line-height: 1.5; }
#booth .booth-text p { font-size: 1.7rem; line-height: 1.9; }
#booth .booth-text p + p { margin-top: 20px; }


#booth .booth-gallery {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--line-d);
}
#booth .booth-gallery-label {
  font-size: 1.8rem;
  letter-spacing: 0.28rem;
  text-align: center;
  color: var(--ld-red-lit);
}
#booth .booth-gallery h3 {
  margin-top: 10px;
  margin-bottom: 0;
  font-size: 2.6rem;   /* 通常のh3(2.2rem)より一段大きく */
  text-align: center;
  line-height: 1.5;
}
#booth .booth-photos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}
#booth .booth-photos li {
  min-width: 0;
  aspect-ratio: 1 / 1;
  list-style: none;
}
#booth .booth-photos li img {
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   7. イベント概要（コンクリート地）
============================================================ */
#event .event-list dt {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 1.4rem;
  letter-spacing: 0.2rem;
  color: var(--ink-sub);
}
#event .event-list dd {
  padding: 16px 0 32px;
  font-size: 1.7rem;
  line-height: 1.9;
  color: #0b0b0b;
}
#event .event-list dd:last-child { padding-bottom: 0; }
#event .event-list aside {
  display: block;
  margin-top: 10px;
  font-size: 1.4rem;
  line-height: 1.8;
  color: var(--ink-sub);
}
#event .event-list a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* ============================================================
   ボタン（明部／暗部で反転）
============================================================ */
#main .button { margin-top: 32px; text-align: center; }
#main .nh-button {
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  max-width: 400px;
  height: 56px;
  border: 1px solid rgba(0, 0, 0, 0.42);
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  font-style: italic;
  font-size: 1.8rem;
  letter-spacing: 0.1rem;
  color: var(--ink);
  text-decoration: none;
}
#main .nh-button:after {
  content: "";
  right: 5px;
  bottom: 5px;
  border-left: 12px solid transparent;
  border-bottom: 12px solid rgba(0, 0, 0, 0.42);
  position: absolute;
}
#main .sec--dark .nh-button,
#main .item-card .nh-button {
  border-color: rgba(255, 255, 255, 0.34);
  color: #fff;
}
#main .sec--dark .nh-button:after,
#main .item-card .nh-button:after { border-bottom-color: rgba(255, 255, 255, 0.34); }

#main .nh-button--disabled {
  border-color: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.38);
  pointer-events: none;
}
#main .nh-button--disabled:after { border-bottom-color: rgba(255, 255, 255, 0.18); }

/* ============================================================
   3. スペシャルインタビューバナー（コンクリート地）
============================================================ */
/* 帯バナーを画面幅いっぱいに1枚 */
#interview .interview-banner {
  display: block;
  border: 1px solid var(--line);
  text-decoration: none;
}
#interview .interview-banner img {
  display: block;
  width: 100%;
  height: auto;
}
#interview .interview-body {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
#interview .interview-lead {
  font-size: 1.6rem;
  line-height: 1.9;
}
#interview .nh-button {
  margin-top: 24px;
  height: 50px;
}

/* ============================================================
   8. 関連コンテンツ（黒ブロック）
============================================================ */
#related .related-links {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
#related .related-card {
  display: flex;
  flex-direction: column;
  background: var(--card-on-dark);
  border: 1px solid var(--line-d);
  text-decoration: none;
  color: var(--ink-d);
}
#related .related-photo img {
  width: 100%;
  height: auto;
  display: block;
}
#related .related-sub-column {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
#related .related-card--sub .related-photo {
  width: 100%;
  max-height: 220px;
  overflow: hidden;
}
#related .related-card--sub .related-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
#related .related-body {
  padding: 22px 18px 26px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
#related .related-title {
  display: block;
  font-size: 1.9rem;
  line-height: 1.7;
  color: #fff;
}
#related .related-sub {
  display: block;
  margin-top: 12px;
  font-size: 1.4rem;
  line-height: 1.8;
  color: var(--ink-sub-d);
}
#related .nh-button {
  margin-top: 20px;
  height: 50px;
  font-size: 1.6rem;
}

/* ============================================================
   fade
============================================================ */
#main .fade { opacity: 0; transition: opacity 900ms ease; }
#main .fade.in { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  #main .fade { opacity: 1; transition: none; }
}