/* =========================================================
   e活 サイト スタイル
   - 配色・余白などはこの :root 内の変数を変えると一括で調整できます
   ========================================================= */
:root {
  --color-bg: #ffffff;
  --color-ink: #14110f;        /* 基本の文字色 */
  --color-muted: #8c8682;      /* 補助テキスト */
  --color-line: #e6e2dd;       /* 区切り線 */
  --color-accent: #14110f;     /* リンク・ボタン */

  --font-base: "Noto Sans JP", system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;

  --maxw: 760px;               /* 本文の最大幅 */
  --section-gap: clamp(6rem, 14vw, 12rem); /* セクション間の余白 */
}

/* ---------- リセット ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-base);
  color: var(--color-ink);
  background: var(--color-bg);
  font-weight: 300;
  line-height: 2;
  letter-spacing: 0.06em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }

/* =========================================================
   左右の縦書き固定テキスト
   ========================================================= */
.side-rail {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-size: 0.72rem;
  letter-spacing: 0.35em;
  color: var(--color-muted);
  z-index: 50;
  user-select: none;
}
.side-rail--left  { left: 1.6rem; }
.side-rail--right { right: 1.6rem; }

/* =========================================================
   ヘッダー（ナビ＋ロゴ）
   ========================================================= */
.site-header {
  text-align: center;
  padding: 2.4rem 1rem 1rem;
}
.nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(1.2rem, 4vw, 3rem);
  font-size: 0.86rem;
  letter-spacing: 0.18em;
}
.nav a {
  position: relative;
  padding-bottom: 4px;
  color: var(--color-ink);
  transition: opacity 0.25s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
}
.nav a:hover { opacity: 0.6; }
.nav a:hover::after { transform: scaleX(1); }

.brand {
  display: inline-block;
  margin-top: 2.2rem;
}
.brand img { width: clamp(92px, 12vw, 120px); }

/* =========================================================
   セクション共通
   ========================================================= */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
  margin-top: var(--section-gap);
}

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.3em;
  color: var(--color-muted);
  text-transform: lowercase;
  text-align: center;
  margin-bottom: 2.4rem;
}
.eyebrow::after {
  content: "";
  display: block;
  width: 28px; height: 1px;
  background: var(--color-line);
  margin: 1rem auto 0;
}

/* =========================================================
   ヒーロー（山の風景）
   ========================================================= */
.hero { margin-top: 3.5rem; }
.hero__media {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.hero__media > img:first-child {
  width: 100%;
  aspect-ratio: 2000 / 900;
  object-fit: cover;
}
.hero__logo {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(64px, 9vw, 96px);
  filter: invert(1) drop-shadow(0 2px 12px rgba(0,0,0,0.35));
}

/* =========================================================
   ご挨拶（メッセージ）
   ========================================================= */
.message { text-align: center; }
.message__lead {
  font-size: clamp(1rem, 2.4vw, 1.18rem);
  line-height: 2.4;
  margin-bottom: 3rem;
}
.message__lead:last-child { margin-bottom: 0; }

/* =========================================================
   project（地方 × eスポーツ × VTuber）
   ========================================================= */
.project { text-align: center; }
.project__title {
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin-bottom: 2.6rem;
}
.project__title span { color: var(--color-muted); margin: 0 0.3em; font-weight: 300; }
.project__body {
  font-size: 0.98rem;
  text-align: left;
  margin-bottom: 1.6rem;
}
.project__body:last-child { margin-bottom: 0; }

/* =========================================================
   私たちの活動（カード 01〜04）
   ========================================================= */
.card {
  display: flex;
  gap: clamp(1.2rem, 4vw, 2.6rem);
  padding: 3rem 0;
  border-top: 1px solid var(--color-line);
}
.activity .card:last-child { border-bottom: 1px solid var(--color-line); }
.card__num {
  flex: none;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-muted);
  letter-spacing: 0.1em;
  min-width: 2.4em;
}
.card__body { flex: 1; }
.card__title {
  font-size: 1.18rem;
  font-weight: 500;
  margin-bottom: 1.1rem;
  letter-spacing: 0.08em;
}
.card__body p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}
.card--feature .card__feature-text {
  font-size: 1.05rem;
  line-height: 2.4;
  letter-spacing: 0.1em;
}

/* ボタン / リンク */
.btn {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.7em 1.8em;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  border: 1px solid var(--color-ink);
  border-radius: 999px;
  transition: background 0.25s, color 0.25s;
}
.btn:hover { background: var(--color-ink); color: var(--color-bg); }
.btn--primary { background: var(--color-ink); color: var(--color-bg); }
.btn--primary:hover { opacity: 0.78; }

/* =========================================================
   VTuber プロフィール
   ========================================================= */
.vt-group-title {
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-align: center;
  margin-top: 3.5rem;
}
.vt-group-title:first-of-type { margin-top: 0; }
.vt-group-lead {
  font-size: 0.9rem;
  color: var(--color-muted);
  text-align: center;
  margin: 0.8rem 0 2.6rem;
}
.vt-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2.4rem 2rem;
}
.vt-card { text-align: center; }
.vt-card__photo {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1rem;
  background: #efece8;
}
.vt-card__name {
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}
.vt-card__bio {
  font-size: 0.86rem;
  color: var(--color-muted);
  line-height: 1.9;
  margin-bottom: 0.9rem;
}
.vt-card__links {
  display: flex;
  justify-content: center;
  gap: 0.9rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}
.vt-card__links a {
  padding-bottom: 2px;
  border-bottom: 1px solid var(--color-line);
  transition: border-color 0.25s, opacity 0.25s;
}
.vt-card__links a:hover { border-color: var(--color-ink); opacity: 0.7; }

/* VTuber 募集セクション */
.vt-recruit {
  margin-top: 4rem;
  padding: 3rem 2rem;
  border-top: 1px solid var(--color-line);
  text-align: center;
}
.vt-recruit__title {
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  font-weight: 500;
  letter-spacing: 0.1em;
  margin: 0.6rem 0 1.2rem;
}
.vt-recruit__body {
  font-size: 0.93rem;
  color: var(--color-muted);
  line-height: 2;
  margin-bottom: 1.8rem;
}
.vt-recruit__actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* =========================================================
   活動記事（works）ページ
   ========================================================= */
.page-head {
  max-width: var(--maxw);
  margin: 4.5rem auto 0;
  padding: 0 1.5rem;
  text-align: center;
}
.page-head__title {
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 500;
  letter-spacing: 0.14em;
}
.page-head__lead {
  font-size: 0.92rem;
  color: var(--color-muted);
  margin-top: 1rem;
}

.works {
  max-width: 980px;
  margin: var(--section-gap) auto 0;
  padding: 0 1.5rem;
}
.works__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 3rem 2.4rem;
}
.work-card { display: block; color: inherit; }
.work-card__thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #efece8;
  margin-bottom: 1.1rem;
}
.work-card__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: 0.6rem;
}
.work-card__cat {
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0.15em 0.9em;
}
.work-card__title {
  font-size: 1.12rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.7;
  margin-bottom: 0.7rem;
  transition: opacity 0.25s;
}
.work-card:hover .work-card__title { opacity: 0.6; }
.work-card:hover .work-card__thumb { opacity: 0.92; }
.work-card__excerpt {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.9;
}
.works__empty {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
  padding: 3rem 0;
}

/* =========================================================
   お知らせ
   ========================================================= */
.news__grid { display: flex; flex-direction: column; }
.news-card {
  display: flex;
  gap: 1.2rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--color-line);
  text-decoration: none;
  color: var(--color-ink);
  align-items: flex-start;
}
.news-card:last-child { border-bottom: 1px solid var(--color-line); }
.news-card:hover .news-card__title { text-decoration: underline; }
.news-card__thumb {
  width: 140px;
  height: 88px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
  background: var(--color-line);
}
.news-card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.news-card time {
  font-size: 0.82rem;
  color: var(--color-muted);
  letter-spacing: 0.08em;
}
.news-card__title {
  font-size: 0.93rem;
  line-height: 1.6;
}
.news__more {
  margin-top: 2rem;
  text-align: center;
}
.news-page,
.vtuber-page {
  max-width: var(--maxw);
  margin: var(--section-gap) auto;
  padding: 0 1.5rem;
}

/* =========================================================
   会社情報
   ========================================================= */
.company { text-align: center; }
.company__catch {
  font-size: clamp(1.2rem, 3.6vw, 1.6rem);
  font-weight: 500;
  letter-spacing: 0.1em;
  margin-bottom: 2.2rem;
}
.company__intro {
  font-size: 0.96rem;
  text-align: left;
  margin-bottom: 1.4rem;
}
.company__table {
  margin-top: 3rem;
  text-align: left;
  border-top: 1px solid var(--color-line);
}
.company__table > div {
  display: flex;
  gap: 1.5rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--color-line);
}
.company__table dt {
  flex: none;
  min-width: 7em;
  color: var(--color-muted);
  font-size: 0.88rem;
}
.company__table dd { font-size: 0.96rem; }

/* =========================================================
   お問い合わせ
   ========================================================= */
.contact { text-align: center; }
.contact__lead {
  font-size: 0.98rem;
  margin-bottom: 2.6rem;
}
.contact__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* =========================================================
   フッター
   ========================================================= */
.site-footer {
  text-align: center;
  margin-top: var(--section-gap);
  padding: 4rem 1.5rem 3rem;
  border-top: 1px solid var(--color-line);
}
.site-footer__logo { margin: 0 auto 1.2rem; opacity: 0.85; }
.site-footer__copy {
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--color-muted);
}

/* =========================================================
   スクロールで「ふわっ」と表示
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* =========================================================
   レスポンシブ（スマホ）
   ========================================================= */
@media (max-width: 720px) {
  .side-rail { display: none; }          /* 縦書きレールはスマホで非表示 */
  body { letter-spacing: 0.04em; }
  .card { flex-direction: column; gap: 0.6rem; }
  .card__num { font-size: 1.2rem; }
  .news__item { flex-direction: column; gap: 0.2rem; }
  .nav { gap: 1rem 1.4rem; font-size: 0.8rem; }
}