/* ────────────────────────────────────────────────────────────
   Page-scoped styles for GATE 配下ページ
   /gate/video/ ・ /gate/yugaku/ ・ /gate/ryuiki/ からのみ読み込む。
   共通パーツ（.subpage-*, .region-*）は components.css 側。
──────────────────────────────────────────────────────────── */

.gate-sub-section {
  position: relative;
  padding: clamp(96px, 14vh, 160px) var(--section-x-wide);
}

.gate-sub-section--tint {
  background:
    linear-gradient(180deg, rgba(8,17,30,0.98) 0%, rgba(9,28,27,0.94) 50%, rgba(8,17,30,0.98) 100%);
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
  overflow: hidden;
}

.gate-sub-section > .activity-prose:last-child,
.gate-sub-section > .activity-feature-image:last-child {
  margin-bottom: 0;
}

.gate-sub-heading {
  width: min(760px, 100%);
  margin: 0 auto clamp(48px, 7vh, 72px);
  text-align: center;
}

.gate-sub-heading h2 {
  margin: 22px 0 0;
  font-weight: 600;
  font-size: clamp(22px, 2.7vw, 36px);
  line-height: 1.7;
  letter-spacing: .09em;
  color: var(--text-primary);
}

/* 本文中で独立させる一文 */
.gate-statement {
  width: min(860px, 100%);
  margin: clamp(56px, 9vh, 96px) auto;
  font-family: var(--font-serif-ja);
  font-size: clamp(20px, 2.3vw, 30px);
  line-height: 2;
  letter-spacing: .08em;
  text-align: center;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.gate-statement::before,
.gate-statement::after {
  content: "";
  display: block;
  width: 1px;
  height: clamp(36px, 6vh, 56px);
  margin: 0 auto clamp(28px, 4vh, 40px);
  background: linear-gradient(rgba(200,169,106,0), rgba(200,169,106,0.6));
}

.gate-statement::after {
  margin: clamp(28px, 4vh, 40px) auto 0;
  background: linear-gradient(rgba(200,169,106,0.6), rgba(200,169,106,0));
}

/* ── YUGAKU: 実写写真タイル（3枚横並び） ──
   元写真は加工せず、表示領域を 4:3 に揃えて CSS でのみトリミングする。 */
.yugaku-photo-tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  width: min(1120px, 100%);
  margin: clamp(24px, 4vh, 40px) auto 0;
}

.yugaku-photo-tiles__img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: 50% 50%;
}

/* 被写体が右側にある写真（雪の森のグループ） */
.yugaku-photo-tiles__img--right {
  object-position: 100% 50%;
}

/* ── YUGAKU: Knowledge → Implementation ── */
.yugaku-process {
  --process-gap: clamp(30px, 3.4vw, 52px);
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--process-gap);
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0;
}

.yugaku-process__step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(28px, 3vw, 40px) 4px;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.yugaku-process__step + .yugaku-process__step::before {
  content: "";
  position: absolute;
  top: 50%;
  left: calc(-1 * var(--process-gap) + 6px);
  width: calc(var(--process-gap) - 12px);
  height: 1px;
  background: linear-gradient(90deg, rgba(200,169,106,0.12), rgba(200,169,106,0.75));
}

.yugaku-process__step + .yugaku-process__step::after {
  content: "";
  position: absolute;
  top: 50%;
  left: -11px;
  width: 6px;
  height: 6px;
  border-top: 1px solid rgba(200,169,106,0.8);
  border-right: 1px solid rgba(200,169,106,0.8);
  transform: translateY(-50%) rotate(45deg);
}

.yugaku-process__num {
  font-family: var(--font-display);
  font-size: 12.5px;
  letter-spacing: .2em;
  color: rgba(200,169,106,0.62);
}

.yugaku-process__en {
  margin-top: 14px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(18px, 1.9vw, 27px);
  letter-spacing: .03em;
  line-height: 1.3;
  color: var(--text-primary);
}

.yugaku-process__ja {
  margin-top: 10px;
  font-size: clamp(14px, 1.1vw, 16px);
  letter-spacing: .24em;
  color: var(--text-muted);
}

.yugaku-process__step--goal {
  border-color: rgba(200,169,106,0.46);
  background: rgba(200,169,106,0.04);
}

.yugaku-process__step--goal .yugaku-process__en {
  color: var(--gold-bright);
}

.yugaku-process__step--goal .yugaku-process__ja {
  color: var(--gold);
}

/* ── YUGAKU: 3つの知性（縦リスト） ── */
.yugaku-intelligence-figure {
  width: min(1040px, 100%);
  margin: 0 auto clamp(72px, 11vh, 120px);
}

.yugaku-intelligence {
  list-style: none;
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 0;
}

.yugaku-intelligence__item + .yugaku-intelligence__item {
  margin-top: clamp(80px, 12vh, 128px);
}

.yugaku-intelligence__num {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.3vw, 18px);
  letter-spacing: .16em;
  color: var(--gold);
  margin-bottom: 14px;
}

.yugaku-intelligence h3 {
  margin: 0 0 clamp(26px, 3.6vh, 36px);
  padding-bottom: clamp(18px, 2.6vh, 24px);
  border-bottom: 1px solid rgba(200,169,106,0.22);
  font-weight: 600;
  font-size: clamp(24px, 2.5vw, 34px);
  line-height: 1.6;
  letter-spacing: .16em;
  color: var(--text-primary);
}

.yugaku-intelligence p {
  max-width: 680px;
  margin: 0;
  font-size: clamp(15px, 1.08vw, 17px);
  line-height: 2.08;
  letter-spacing: .055em;
  color: var(--text-body);
  overflow-wrap: anywhere;
}

.yugaku-intelligence p + p {
  margin-top: 22px;
}

/* ── YUGAKU: closing typography ── */
.yugaku-closing {
  position: relative;
  padding: clamp(120px, 18vh, 210px) var(--section-x-wide);
  text-align: center;
  background: var(--bg-hero);
  overflow: hidden;
}

.yugaku-closing__inner {
  position: relative;
  z-index: 2;
  width: min(880px, 100%);
  margin: 0 auto;
}

.yugaku-closing__lead {
  margin: 0;
  font-family: var(--font-serif-ja);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 56px);
  line-height: 1.8;
  letter-spacing: .12em;
  color: var(--text-primary);
}

.yugaku-closing__verse {
  margin: clamp(56px, 9vh, 90px) 0 0;
  font-family: var(--font-serif-ja);
  font-size: clamp(18px, 2vw, 26px);
  line-height: 2.1;
  letter-spacing: .1em;
  color: var(--text-secondary);
}

.yugaku-closing__text {
  margin: clamp(40px, 6vh, 64px) 0 0;
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 2.2;
  letter-spacing: .07em;
  color: var(--text-body);
  overflow-wrap: anywhere;
}

.yugaku-closing__text + .yugaku-closing__text {
  margin-top: 22px;
}

.yugaku-closing__em {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2em;
  letter-spacing: .04em;
  color: var(--gold-bright);
}

/* ── YUGAKU: 流域へ遊学する（RYUIKI プレビュー） ── */
.ryuiki-preview {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 1.4vw, 18px);
  width: min(860px, 100%);
  margin: clamp(8px, 2vh, 20px) auto 0;
  padding: 0;
}

.ryuiki-preview__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.ryuiki-preview__item img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  margin-bottom: 16px;
  opacity: 0.92;
  transition: opacity 0.3s ease;
}

.ryuiki-preview__item:hover img {
  opacity: 1;
}

.ryuiki-preview__en {
  font-family: var(--font-display);
  font-size: clamp(12px, 1.1vw, 15px);
  letter-spacing: .16em;
  color: var(--gold);
}

.ryuiki-preview__ja {
  margin-top: 4px;
  font-size: clamp(11.5px, 1vw, 13.5px);
  letter-spacing: .08em;
  color: var(--text-muted);
  white-space: nowrap;
}

.ryuiki-preview__cta {
  margin-top: clamp(44px, 6vh, 64px);
  text-align: center;
}

/* ── RYUIKI ── */
.ryuiki-intro {
  width: min(760px, 100%);
  margin: 0 auto;
}

.ryuiki-intro p {
  margin: 0 0 30px;
  font-family: var(--font-serif-ja);
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 2.25;
  letter-spacing: .07em;
  color: var(--text-secondary);
  overflow-wrap: anywhere;
}

.ryuiki-intro p:last-child {
  margin-bottom: 0;
}

.ryuiki-intro p.ryuiki-intro__lead {
  font-size: clamp(20px, 2.1vw, 28px);
  line-height: 2;
  color: var(--text-primary);
}

@media (max-width: 900px) {
  .yugaku-process {
    --process-gap: 40px;
    grid-template-columns: 1fr;
    width: min(420px, 100%);
  }

  .yugaku-process__step {
    padding: 24px 12px;
  }

  .yugaku-process__step + .yugaku-process__step::before {
    top: calc(-1 * var(--process-gap) + 6px);
    left: 50%;
    width: 1px;
    height: calc(var(--process-gap) - 12px);
    background: linear-gradient(180deg, rgba(200,169,106,0.12), rgba(200,169,106,0.75));
  }

  .yugaku-process__step + .yugaku-process__step::after {
    top: -11px;
    left: 50%;
    transform: translateX(-50%) rotate(135deg);
  }
}

@media (max-width: 768px) {
  .yugaku-photo-tiles {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .gate-sub-heading {
    text-align: left;
  }

  .gate-statement {
    text-align: left;
  }

  .gate-statement::before,
  .gate-statement::after {
    margin-left: 0;
  }

  .yugaku-closing__lead {
    letter-spacing: .08em;
  }
}

/* ────────────────────────────────────────────────────────────
   VIDEO（/gate/video/）映像ライブラリー
   カード等の HTML は scripts/generate-video.mjs が src/data/videos.mjs から生成する。
──────────────────────────────────────────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.video-hero {
  min-height: 74vh;
  padding-bottom: clamp(130px, 17vh, 160px);
}

.video-hero__lead {
  max-width: 680px;
  margin: clamp(36px, 5vh, 48px) auto 0;
  font-size: clamp(14.5px, 1.05vw, 16px);
  line-height: 2.1;
  letter-spacing: .06em;
  color: var(--text-body);
  text-shadow: 0 2px 22px rgba(3,8,14,0.7);
  word-break: auto-phrase;
}

.video-section {
  padding-top: clamp(84px, 12vh, 140px);
  padding-bottom: clamp(84px, 12vh, 140px);
}

.video-section__inner {
  position: relative;
  z-index: 2;
  width: min(1120px, 100%);
  margin: 0 auto;
}

/* 見出し「NEW｜新着」 */
.video-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  margin: 0 0 clamp(36px, 5vh, 56px);
  font-weight: 400;
  line-height: 1.4;
}

.video-heading__en {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(26px, 2.8vw, 38px);
  letter-spacing: .12em;
  color: var(--gold);
}

.video-heading__sep {
  margin: 0 .7em 0 .5em;
  font-size: clamp(15px, 1.3vw, 18px);
  color: rgba(200,169,106,0.45);
}

.video-heading__ja {
  font-size: clamp(15px, 1.3vw, 18px);
  letter-spacing: .18em;
  color: var(--text-primary);
}

/* ── 動画カード（サムネイル + タイトル） ──
   NEW は最大6本。本数に応じて列数を変え、サムネイルが小さくなりすぎないようにする
   （6本でも横一列にはしない）。 */
.video-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(36px, 5vh, 52px) clamp(20px, 2.4vw, 32px);
  margin: 0;
  padding: 0;
}

.video-grid--count-1 { grid-template-columns: minmax(0, 560px); }
.video-grid--count-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* 3本・5本・6本は3列（5本＝3＋2、6本＝3×2段） */
.video-grid--count-3,
.video-grid--count-5,
.video-grid--count-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* 4本は 2列×2段。横一列にするとサムネイルが小さくなりすぎるため */
.video-grid--count-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.video-card {
  min-width: 0;
}

.video-card[hidden] {
  display: none;
}

.video-card__link {
  display: block;
  color: inherit;
}

.video-card__thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-hero);
}

.video-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.9;
  transition: transform 0.6s ease, opacity 0.3s ease;
}

/* 再生マーク（細い円 + 三角） */
.video-card__thumb::before,
.video-card__thumb::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 1;
  pointer-events: none;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.video-card__thumb::after {
  width: 52px;
  height: 52px;
  margin: -26px 0 0 -26px;
  border: 1px solid rgba(241,236,224,0.55);
  border-radius: 50%;
  background: rgba(8,17,30,0.28);
}

.video-card__thumb::before {
  z-index: 2;
  margin: -7px 0 0 -3px;
  border-style: solid;
  border-width: 7px 0 7px 11px;
  border-color: transparent transparent transparent rgba(241,236,224,0.85);
}

.video-card__link:hover .video-card__thumb img,
.video-card__link:focus-visible .video-card__thumb img {
  opacity: 1;
  transform: scale(1.035);
}

.video-card__link:hover .video-card__thumb::after,
.video-card__link:focus-visible .video-card__thumb::after {
  border-color: rgba(224,196,133,0.9);
  background: rgba(8,17,30,0.45);
}

.video-card__link:hover .video-card__thumb::before,
.video-card__link:focus-visible .video-card__thumb::before {
  border-left-color: var(--gold-bright);
}

/* 将来の PREMIUM 動画用ラベル */
.video-card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 3;
  padding: 5px 10px 4px;
  font-family: var(--font-ui);
  font-size: 9.5px;
  letter-spacing: .26em;
  line-height: 1.4;
  color: var(--gold-bright);
  background: rgba(8,17,30,0.74);
  border: 1px solid rgba(200,169,106,0.5);
}

.video-card__title {
  margin: 18px 0 0;
  font-weight: 400;
  font-size: clamp(14.5px, 1.08vw, 16px);
  line-height: 1.85;
  letter-spacing: .04em;
  color: var(--text-primary);
  overflow-wrap: anywhere;
  word-break: auto-phrase;
  transition: color 0.25s ease;
}

.video-card__link:hover .video-card__title {
  color: var(--gold-bright);
}

.video-more {
  margin-top: clamp(44px, 6vh, 64px);
  text-align: right;
}

/* ── PLAYLIST（大カテゴリー） ── */
.video-playlists {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(36px, 4vw, 64px);
  margin: 0;
  padding: 0;
}

.video-playlist__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding-top: clamp(26px, 3.4vh, 36px);
  border-top: 1px solid rgba(200,169,106,0.34);
}

.video-playlist__name {
  margin: 0;
  font-weight: 400;
}

.video-playlist__en {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.2vw, 30px);
  line-height: 1.35;
  letter-spacing: .1em;
  color: var(--gold);
}

.video-playlist__ja {
  display: block;
  margin-top: 8px;
  font-size: clamp(14px, 1.1vw, 16px);
  letter-spacing: .2em;
  color: var(--text-primary);
}

.video-playlist__desc {
  margin: 22px 0 0;
  font-size: clamp(14px, 1.02vw, 15.5px);
  line-height: 2;
  letter-spacing: .04em;
  color: var(--text-body);
  overflow-wrap: anywhere;
  word-break: auto-phrase;
}

.video-playlist__cta {
  margin-top: 28px;
}

/* プレイリスト画像（YouTube プレイリストへの入口）
   元画像は加工せず、表示領域を 16:9 に揃えて CSS でのみ調整する。
   margin-top: auto で、説明文の長さが違っても各カラムの画像の位置を揃える。 */
.video-playlist__thumb {
  position: relative;
  display: block;
  margin-top: auto;
  overflow: hidden;
  cursor: pointer;
}

/* hover 時の細いゴールドの縁（画像の上に文字は重ねない） */
.video-playlist__thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  pointer-events: none;
  transition: border-color 0.3s ease;
}

.video-playlist__thumb:hover::after,
.video-playlist__thumb:focus-visible::after {
  border-color: rgba(200,169,106,0.5);
}

/* 説明文と画像の最小の間隔（画像側の margin-top: auto と両立させるため説明文側に付ける） */
.video-playlist:has(.video-playlist__thumb) .video-playlist__desc {
  margin-bottom: clamp(26px, 3.4vh, 34px);
}

.video-playlist__thumb img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.9;
  transition: transform 0.6s ease, opacity 0.3s ease;
}

.video-playlist__thumb:hover img,
.video-playlist__thumb:focus-visible img {
  opacity: 1;
  transform: scale(1.02);
}

.video-playlist__thumb:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 4px;
}

.video-playlist__status {
  margin-top: 28px;
  font-family: var(--font-ui);
  font-size: 10.5px;
  letter-spacing: .32em;
  color: var(--text-faint);
}

.video-playlist--soon .video-playlist__inner {
  border-top-color: var(--border-subtle);
}

.video-playlist--soon .video-playlist__en {
  color: rgba(200,169,106,0.62);
}

/* ── TOPICS（テーマで絞り込み） ── */
.video-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px clamp(22px, 2.6vw, 36px);
  margin: 0 0 clamp(40px, 6vh, 60px);
}

.video-topics__btn {
  padding: 6px 0 5px;
  background: none;
  border: 0;
  border-bottom: 1px solid transparent;
  font-family: var(--font-serif);
  font-size: clamp(14px, 1.1vw, 16px);
  letter-spacing: .08em;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.video-topics__btn:hover {
  color: var(--gold);
}

.video-topics__btn[aria-pressed="true"] {
  color: var(--gold-bright);
  border-bottom-color: rgba(200,169,106,0.6);
}

.video-topics__btn:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 4px;
}

.video-empty {
  margin: 0;
  padding: clamp(24px, 4vh, 40px) 0;
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--text-muted);
}

/* ── PREMIUM ── */
.video-premium {
  text-align: center;
}

.video-premium__title {
  margin: 0;
  padding-left: .24em;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(30px, 3.6vw, 48px);
  letter-spacing: .24em;
  color: var(--text-primary);
}

.video-premium__soon {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin: 24px 0 0;
  font-family: var(--font-ui);
  font-size: 10.5px;
  letter-spacing: .36em;
  color: var(--gold-label);
}

.video-premium__soon::before,
.video-premium__soon::after {
  content: "";
  width: 28px;
  height: 1px;
  background: rgba(200,169,106,0.45);
}

.video-premium .video-grid {
  margin-top: clamp(44px, 6vh, 64px);
  text-align: left;
}

@media (max-width: 1024px) {
  .video-playlists {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: clamp(56px, 8vh, 72px);
  }

  .video-grid--count-4,
  .video-grid--count-5,
  .video-grid--count-6,
  .video-grid--library {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  /* 3本のときは1本目を大きく、2本目・3本目を横並びに */
  .video-grid--count-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-grid--count-3 > .video-card:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .video-playlists {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .video-more {
    text-align: left;
  }
}

@media (max-width: 600px) {
  .video-grid,
  .video-grid--count-2,
  .video-grid--count-3,
  .video-grid--count-4,
  .video-grid--count-5,
  .video-grid--count-6,
  .video-grid--library {
    grid-template-columns: 1fr;
  }

  .video-topics {
    gap: 8px 22px;
  }
}