/* ═══════════════════════════════════════════
   index.css
   index.html (TOP) 固有のスタイル
   - ページ全体レイアウト（flex column）
   - Hero セクション
   - Hero コピー / ビジュアル / ナビ
   - TOP Footer（他ページより情報量が多い）
   ═══════════════════════════════════════════ */


/* ── ページ全体レイアウト ─────────────────── */

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}


/* ── Hero ─────────────────────────────────── */

.top-hero {
  flex: 1;
  min-height: calc(80vh - var(--nav-h));
  padding-top: var(--nav-h);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 48px;
  text-align: center;
}


/* ── Hero Copy ────────────────────────────── */

.top-hero__copy {
  padding-top: 52px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.top-hero__headline {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  color: var(--ink);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.top-hero__headline img {
  max-width: 90vw;
  height: auto;
  margin: 0 auto;
}

.top-hero__sub {
  font-size: clamp(0.85rem, 1.8vw, 1.05rem);
  color: var(--navy-soft);
  font-weight: 300;
  letter-spacing: 0.04em;
}

.top-hero__note {
  font-size: clamp(0.7rem, 1.4vw, 0.82rem);
  color: var(--ink-soft);
  font-weight: 300;
  letter-spacing: 0.05em;
  margin-top: 4px;
}


/* ── Hero Visual ──────────────────────────── */

.top-hero__visual {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 24px;
  width: 100%;
}

.top-hero__visual img {
  mix-blend-mode: multiply;
  max-height: 46vh;
  max-width: min(440px, 90vw);
  width: auto;
  height: auto;
  object-fit: contain;
}


/* ── Hero Bottom Nav ──────────────────────── */

.top-hero__nav {
  display: flex;
  gap: clamp(20px, 5vw, 48px);
  list-style: none;
}

.top-hero__nav a {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  font-weight: 400;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.top-hero__nav a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}


/* ── TOP Footer ───────────────────────────── */

.top-footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  min-height: 20vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 40px 32px;
  text-align: center;
  gap: 20px;
}

.top-footer__brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.top-footer__brand img {
  margin: 0 auto;
  mix-blend-mode: multiply;
}

.top-footer__tagline {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  font-weight: 300;
}

.top-footer__info {
  font-size: 0.7rem;
  color: var(--ink-soft);
  font-weight: 300;
  letter-spacing: 0.04em;
  line-height: 2;
  font-style: normal;
}

.top-footer__info a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.top-footer__info a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.top-footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
  flex-wrap: wrap;
  justify-content: center;
}

.top-footer__links a {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  font-weight: 300;
  transition: color 0.2s;
}

.top-footer__links a:hover {
  color: var(--ink);
}

.top-footer__copy {
  font-size: 0.62rem;
  color: var(--border);
  letter-spacing: 0.06em;
}


/* ── Responsive ───────────────────────────── */

@media (max-width: 640px) {
  .top-hero__copy {
    padding-top: 40px;
  }

  .top-hero__visual img {
    max-height: 40vh;
  }

  .top-footer {
    padding: 32px 24px 28px;
  }
}

@media (max-width: 380px) {
  .nav-links a {
    font-size: 0.7rem;
  }
}