/* ============================================================
   テイネサンライズコブ祭！2026 ダイジェスト — style.css
   デザインコンセプト：デザインはシックに、コンテンツは賑やかに
   トークン定義は docs/design-system.md と対応している
   ============================================================ */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, p, dl, dd, figure, ul { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

/* ---------- Tokens ---------- */
:root {
  /* color */
  --color-bg: #ffffff;
  --color-bg-alt: #f7f6f3;
  --color-surface-dark: #111111;
  --color-ink: #111111;
  --color-body: #4a4a4a;
  --color-muted: #6b6b6b;
  --color-border: #e3e1dc;
  --color-on-dark: #ffffff;
  --color-on-dark-muted: #b8b8b8;
  --color-accent: #e8831a;
  --color-accent-contrast: #ffffff;

  /* type */
  --font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium", "Noto Sans JP", sans-serif;
  --fs-hero: clamp(2.4rem, 7vw + 1rem, 4.75rem);
  --fs-h2: clamp(1.75rem, 4vw + 0.5rem, 2.75rem);
  --fs-h3: clamp(1.25rem, 2.5vw + 0.5rem, 1.75rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --lh-tight: 1.25;
  --lh-normal: 1.85;

  /* space */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --container-width: 1120px;
}

/* ---------- Base ---------- */
html, body {
  overflow-x: hidden; /* 安全策：flex/grid内のテキストが折り返さず突き抜けても横スクロールを発生させない */
}

body {
  font-family: var(--font-sans);
  color: var(--color-body);
  background: var(--color-bg);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

h1, h2, h3 {
  color: var(--color-ink);
  line-height: var(--lh-tight);
  font-weight: 900;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-6); }
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -100px;
  background: var(--color-ink);
  color: var(--color-on-dark);
  padding: var(--space-2) var(--space-4);
  z-index: 1000;
  transition: top 0.2s ease;
}
.skip-link:focus { top: var(--space-3); }

/* ---------- Site header / nav ---------- */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-3);
}
.site-header__brand {
  grid-column: 2;
  justify-self: center;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  min-width: 0;
}
.site-header__logo { height: clamp(84px, 24vw, 144px); width: auto; border-radius: 0; object-fit: contain; flex-shrink: 0; }
.site-header__title {
  font-weight: 900;
  font-size: clamp(1.6rem, 4.8vw, 1.875rem);
  color: var(--color-ink);
  line-height: 1.25;
}
.site-header__year {
  display: block;
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: 0.08em;
  font-size: 1.6rem;
}

.nav-toggle {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
}
.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
}
.nav-toggle__bar::before { position: absolute; top: -6px; }
.nav-toggle__bar::after { position: absolute; top: 6px; }
.nav-toggle__label { font-size: var(--fs-small); letter-spacing: 0.08em; }

@media (min-width: 1024px) {
  .nav-toggle { display: none; }
}

.primary-nav {
  border-top: 1px solid var(--color-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.primary-nav.is-open { max-height: 480px; }
.primary-nav ul {
  display: flex;
  flex-direction: column;
}
.primary-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--color-border);
}
.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--color-accent);
}

@media (min-width: 1024px) {
  .primary-nav {
    max-height: none;
    overflow: visible;
    border-top: 0;
  }
  .primary-nav ul {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-5);
  }
  .primary-nav a {
    padding: var(--space-3) 0;
    border-bottom: 2px solid transparent;
  }
  .primary-nav a:hover,
  .primary-nav a:focus-visible {
    border-bottom-color: var(--color-accent);
  }
}

/* ---------- Section scaffolding ---------- */
.section {
  padding-block: var(--space-7);
  background: var(--color-bg);
  scroll-margin-top: 64px;
}
.section--alt { background: var(--color-bg-alt); }
.section--dark {
  background: var(--color-surface-dark);
  color: var(--color-on-dark);
}
.section--dark .section-heading { color: var(--color-on-dark); }

@media (min-width: 768px) {
  .section { padding-block: var(--space-8); }
}

.section-eyebrow {
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}
.section-heading {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-5);
  max-width: 20ch;
}

.placeholder-copy {
  color: var(--color-muted);
  font-style: italic;
  max-width: 60ch;
  margin-bottom: var(--space-4);
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  color: var(--color-on-dark);
  overflow: hidden;
  scroll-margin-top: 0;
}
/* ---------- HERO：3分割・同時クロスフェード ---------- */
.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
}
.hero__col {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  height: 100%;
  overflow: hidden;
}

/* 1列につき3枚（SET A/B/C）を重ねて配置し、CSSアニメーションのみで同期クロスフェードさせる。
   JSに依存しないため、画像読み込み失敗時やJS停止時にも最低限破綻しない。 */
.hero__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  animation: hero-crossfade 24s infinite ease-in-out;
  animation-fill-mode: backwards; /* animation-delay中も0%の状態（非表示）を維持 */
}
.hero__slide--set-a { animation-delay: 0s; }
.hero__slide--set-b { animation-delay: 8s; }
.hero__slide--set-c { animation-delay: 16s; }

@keyframes hero-crossfade {
  0%      { opacity: 0; transform: scale(1.045); }
  4.17%   { opacity: 1; transform: scale(1.03); }  /* 1秒かけてフェードイン */
  29.17%  { opacity: 1; transform: scale(1); }      /* 表示7秒（うち緩やかにズームアウト） */
  33.33%  { opacity: 0; transform: scale(1); }      /* 1秒かけてフェードアウト */
  100%    { opacity: 0; }
}

.hero__slide--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4);
  background: repeating-linear-gradient(135deg, #2a2a28, #2a2a28 10px, #222220 10px, #222220 20px);
  color: var(--color-on-dark-muted);
  font-size: var(--fs-small);
  line-height: 1.6;
}

/* .hero__slide が <picture> の場合、中のimgを引き伸ばしてcoverさせる */
.hero__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 公開同意未確認の人物写真用：assets/images/local-preview/（Git管理外）を参照する。
   公開用ビルドでファイルが存在しない場合は img の読み込みが失敗し、
   onerror="heroFallback(this)"（main.js）が .is-missing を付与して
   プレースホルダー（.hero__slide__fallback）へ自動的に切り替わる。
   位置指定は .hero__slide の position:absolute（同じ要素に付与済み）をそのまま使う。
   【バグ修正】以前ここに position:relative を指定しており、.hero__slide の
   position:absolute と詳細度が同一のため、CSS記述順（本ルールが後）により
   absoluteが上書きされ、ゲート付きスライドが通常のドキュメントフロー内で
   縦に積み重なって列の外（overflow:hiddenでクリップされる範囲）へ
   押し出されていた。これがSET B・右やSET C全列が表示されない直接の原因だった。 */
.hero__slide__fallback {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4);
  background: repeating-linear-gradient(135deg, #2a2a28, #2a2a28 10px, #222220 10px, #222220 20px);
  color: var(--color-on-dark-muted);
  font-size: var(--fs-small);
  line-height: 1.6;
}
.hero__slide--gated.is-missing img {
  display: none;
}
.hero__slide--gated.is-missing .hero__slide__fallback {
  display: flex;
}

@media (prefers-reduced-motion: reduce) {
  .hero__slide { animation-name: hero-crossfade-reduced; }
}
@keyframes hero-crossfade-reduced {
  0%      { opacity: 0; }
  4.17%   { opacity: 1; }
  29.17%  { opacity: 1; }
  33.33%  { opacity: 0; }
  100%    { opacity: 0; }
}

/* モバイルは3分割を維持せず、中央列のみ全幅表示（1枚スライドショー化） */
@media (max-width: 767px) {
  .hero__col--left,
  .hero__col--right {
    display: none;
  }
  .hero__col--center {
    flex: 1 1 100%;
  }
}

.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(0deg, rgba(0,0,0,0.78) 0%, rgba(0,0,0,0.4) 42%, rgba(0,0,0,0.12) 70%),
    linear-gradient(100deg, rgba(0,0,0,0.45) 0%, rgba(0,0,0,0) 55%);
}
.hero__content {
  position: relative;
  z-index: 2;
  padding: var(--space-6) var(--space-4) var(--space-7);
  max-width: var(--container-width);
  margin-inline: auto;
  width: 100%;
  min-width: 0; /* .hero(flex)の子として、内容の最小幅で突き抜けないようにする */
}
.hero__eyebrow {
  font-size: var(--fs-small);
  letter-spacing: 0.1em;
  color: var(--color-on-dark-muted);
  margin-bottom: var(--space-3);
  overflow-wrap: break-word;
}
.hero__headline {
  font-size: var(--fs-hero);
  color: var(--color-on-dark);
  margin-bottom: var(--space-4);
}
.hero__subhead {
  font-size: clamp(1rem, 2vw + 0.5rem, 1.35rem);
  color: var(--color-on-dark);
  margin-bottom: var(--space-5);
  max-width: 40ch;
}
.hero__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.hero__meta-item {
  min-width: 0;
}
.hero__meta-item dt {
  font-size: var(--fs-small);
  color: var(--color-on-dark-muted);
  letter-spacing: 0.08em;
}
.hero__meta-item dd {
  margin: 0;
  font-weight: 700;
  overflow-wrap: break-word;
}
.hero__note {
  font-size: var(--fs-small);
  color: var(--color-on-dark-muted);
  max-width: 48ch;
}

@media (min-width: 768px) {
  .hero__meta { flex-direction: row; flex-wrap: wrap; gap: var(--space-6); }
}

/* ---------- RECAP grid ---------- */
.recap-grid {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.recap-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-4);
}
.recap-card h3 {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-3);
}

@media (min-width: 640px) {
  .recap-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .recap-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .recap-grid .recap-card:nth-child(odd) { transform: translateY(var(--space-5)); }
}

.recap-gallery {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-4);
}
.recap-gallery__item {
  position: relative;
  margin: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.recap-gallery__item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  display: block;
}
.recap-gallery__item figcaption {
  font-size: var(--fs-small);
  color: var(--color-muted);
  padding: var(--space-3);
}
.recap-gallery__fallback {
  display: none;
  position: absolute;
  inset: 0;
  bottom: 48px; /* figcaption分を除いた画像エリアのみを覆う */
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-3);
  background: repeating-linear-gradient(135deg, #f0efea, #f0efea 10px, #e6e4dd 10px, #e6e4dd 20px);
  color: var(--color-muted);
  font-size: var(--fs-small);
  line-height: 1.6;
}
.recap-gallery__item--gated.is-missing img { display: none; }
.recap-gallery__item--gated.is-missing .recap-gallery__fallback { display: flex; }

@media (max-width: 639px) {
  .recap-gallery { grid-template-columns: 1fr; }
}

/* ---------- DAY blocks (alternating layout) ---------- */
.day-block__inner {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}
@media (min-width: 900px) {
  .day-block__inner {
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-7);
  }
  .day-block--reverse .day-block__inner {
    grid-template-columns: 1fr 1.1fr;
  }
  .day-block--reverse .day-block__media { order: 2; }
  .day-block--reverse .day-block__text { order: 1; }
}

/* ---------- 汎用：公開同意未確認メディアのフォールバック（HERO外・明背景用） ---------- */
.gated-media {
  position: relative;
  overflow: hidden;
}
.gated-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.gated-media__fallback {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-3);
  background: repeating-linear-gradient(135deg, #f0efea, #f0efea 10px, #e6e4dd 10px, #e6e4dd 20px);
  color: var(--color-muted);
  font-size: var(--fs-small);
  line-height: 1.6;
}
.gated-media.is-missing img,
.gated-media.is-missing video { display: none; }
.gated-media.is-missing .gated-media__fallback { display: flex; }

/* ---------- DAY1：写真コラージュ（非対称） ---------- */
.photo-collage {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
.photo-collage__item {
  margin: 0;
  border: 1px solid var(--color-border);
  aspect-ratio: 1 / 1;
}
.photo-collage__item--a { grid-column: span 2; aspect-ratio: 16 / 9; }
.photo-collage__item--e { grid-column: span 2; aspect-ratio: 21 / 9; }

@media (min-width: 640px) and (min-width: 900px) {
  .photo-collage { grid-template-columns: repeat(3, 1fr); }
  .photo-collage__item--a { grid-column: span 3; aspect-ratio: 16 / 7; }
  .photo-collage__item--b { grid-row: span 2; aspect-ratio: auto; height: 100%; }
  .photo-collage__item--e { grid-column: span 3; }
}

/* ---------- YouTube 遅延読み込みfacade ---------- */
.video-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-surface-dark);
  margin-top: var(--space-4);
  overflow: hidden;
}
.video-embed--large { margin-top: 0; }
.video-embed__trigger {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  cursor: pointer;
}
.video-embed__trigger img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.video-embed__play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(17, 17, 17, 0.75);
  transition: background 0.2s ease, transform 0.2s ease;
}
.video-embed__play::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 54%;
  transform: translate(-50%, -50%);
  border-style: solid;
  border-width: 11px 0 11px 18px;
  border-color: transparent transparent transparent #fff;
}
.video-embed__trigger:hover .video-embed__play,
.video-embed__trigger:focus-visible .video-embed__play {
  background: var(--color-accent);
  transform: translate(-50%, -50%) scale(1.08);
}
.video-embed__iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video-embed__fallback-link {
  margin-top: var(--space-2);
  font-size: var(--fs-small);
}
.video-embed__fallback-link a { color: var(--color-muted); }

/* ---------- EXHIBITION：動画カード ---------- */
.video-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-5);
}
@media (min-width: 640px) {
  .video-card-grid { grid-template-columns: repeat(3, 1fr); }
}
.video-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: var(--space-4);
}
.video-card > img { aspect-ratio: 4 / 3; }
.video-card__video {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: 70vh;
  object-fit: contain;
  background: #000;
}
.video-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 3.6rem;
  margin-bottom: var(--space-3);
}
.video-card__title {
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--color-ink);
  text-align: center;
}
.video-card__title::after {
  content: "";
  display: block;
  width: 32px;
  height: 3px;
  margin: var(--space-2) auto 0;
  background: var(--color-accent);
}
.video-card__duration {
  margin-top: var(--space-2);
  font-size: 0.78rem;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
  text-align: center;
}
.video-card__note {
  display: block;
  color: var(--color-accent);
}

.coach-list {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}
.coach-list__item {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-3);
}
.coach-list__name {
  display: block;
  font-weight: 700;
  color: var(--color-ink);
}
.coach-list__role {
  display: block;
  font-size: var(--fs-small);
  color: var(--color-muted);
}

/* ---------- Media placeholder ---------- */
.media-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
  background: repeating-linear-gradient(
    135deg,
    #f0efea,
    #f0efea 10px,
    #e6e4dd 10px,
    #e6e4dd 20px
  );
  border: 1px dashed #b7b4ac;
  color: var(--color-muted);
  padding: var(--space-4);
  width: 100%;
  min-height: 180px;
}
.media-placeholder--wide { min-height: 240px; }
.media-placeholder--tall { min-height: 320px; aspect-ratio: 4 / 3; }
.media-placeholder--video { min-height: 200px; aspect-ratio: 16 / 9; margin-top: var(--space-4); }
.media-placeholder--square { aspect-ratio: 1 / 1; min-height: 0; }
.media-placeholder__label {
  font-weight: 700;
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
}
.media-placeholder__sub {
  font-size: 0.75rem;
  max-width: 28ch;
}
button.media-placeholder { border-style: dashed; }

/* ---------- Gallery ---------- */
.gallery-category { margin-bottom: var(--space-6); }
.gallery-category h3 {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-3);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
@media (min-width: 640px) {
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}
.gallery-item--wide { grid-column: span 2; }
.gallery-item--wide img { aspect-ratio: 16 / 10; }
.gallery-grid--athletes {
  grid-template-columns: repeat(2, 1fr);
  margin-top: var(--space-3);
}
@media (min-width: 640px) {
  .gallery-grid--athletes { grid-template-columns: repeat(4, 1fr); }
}
.gallery-item figcaption {
  font-size: var(--fs-small);
  color: var(--color-muted);
  margin-top: var(--space-2);
}
.gallery-note {
  font-size: var(--fs-small);
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
}
.gallery-item__btn {
  display: block;
  width: 100%;
  padding: 0;
  margin: 0;
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  text-align: inherit;
  cursor: zoom-in;
}
.gallery-item__btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.gallery-item__btn:disabled { cursor: default; }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.lightbox[hidden] { display: none; }
.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 17, 17, 0.88);
  border: 0;
}
.lightbox__content {
  position: relative;
  z-index: 1;
  max-width: min(1100px, 92vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.lightbox__img {
  max-width: 100%;
  max-height: 78vh;
  object-fit: contain;
  background: var(--color-surface-dark);
}
.lightbox__caption {
  color: #fff;
  font-size: var(--fs-small);
  margin-top: var(--space-2);
  text-align: center;
}
.lightbox__close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 0;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-ink);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox__close:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
body.lightbox-open { overflow: hidden; }

/* ---------- Video grid (exhibition) ---------- */
.video-grid {
  display: grid;
  gap: var(--space-4);
}
@media (min-width: 640px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
}
.video-grid .media-placeholder--video { margin-top: 0; }

/* ---------- Sponsors ---------- */
.thanks-lead {
  max-width: 64ch;
  margin-bottom: var(--space-6);
}
.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  align-items: center;
}
@media (min-width: 640px) {
  .sponsor-grid { grid-template-columns: repeat(4, 1fr); }
}
.sponsor-grid__item {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-4);
  min-height: 110px;
  filter: grayscale(35%);
  transition: filter 0.2s ease;
}
.sponsor-grid__item:hover,
.sponsor-grid__item:focus-within {
  filter: grayscale(0%);
}
.sponsor-grid__item img { max-height: 64px; width: auto; }
.sponsor-grid__item a { display: block; }
.sponsor-grid__item--pending {
  flex-direction: column;
  gap: var(--space-2);
  border-style: dashed;
  filter: none;
}
.sponsor-grid__placeholder {
  font-weight: 700;
  text-align: center;
  color: var(--color-ink);
  font-size: var(--fs-small);
}
.sponsor-grid__note {
  font-size: 0.7rem;
  color: var(--color-muted);
  text-align: center;
}

/* ---------- Teaser (2027) ---------- */
.teaser { text-align: center; }
.teaser__inner { padding-block: var(--space-7); }
.teaser__year {
  font-size: clamp(2.5rem, 10vw, 6rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3);
}
.teaser__headline {
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  letter-spacing: 0.2em;
  color: var(--color-on-dark);
  margin-bottom: var(--space-5);
}
.teaser__copy {
  color: var(--color-on-dark-muted);
  font-size: clamp(1rem, 2vw, 1.25rem);
}

/* ---------- SNS / Footer ---------- */
.sns-block { text-align: center; }
.sns-link {
  display: inline-block;
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-ink);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--fs-small);
  transition: background 0.2s ease, color 0.2s ease;
}
.sns-link:hover,
.sns-link:focus-visible {
  background: var(--color-ink);
  color: var(--color-on-dark);
}

.site-footer {
  background: var(--color-surface-dark);
  color: var(--color-on-dark-muted);
  padding-block: var(--space-5);
  text-align: center;
  font-size: var(--fs-small);
}