/* ------------------------------------------------------
   ページ背景（粒子アイコン）
   ページ全体でスクロールしても画面に固定される。
------------------------------------------------------ */

.page-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.page-bg__canvas-wrap {
  position: absolute;
  top: -6vh;
  right: -14vw;
  width: 64vw;
  min-width: 460px;
  max-width: 1100px;
  aspect-ratio: 55.42 / 55.58;
}

.page-bg__canvas-wrap canvas {
  width: 100%;
  height: 100%;
  display: block;
}

@media (max-width: 860px) {
  .page-bg__canvas-wrap {
    top: -2vh;
    right: -30vw;
    width: 90vw;
    min-width: 340px;
  }
}

/* ------------------------------------------------------
   ファーストビュー
------------------------------------------------------ */

.fv {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 1160px;
  margin: 0 auto;
  padding: calc(var(--header-h) + 2rem) 1.5rem 5rem;
}

.fv-tagline-en {
  font-family: "Lobster", cursive;
  font-weight: 400;
  font-size: clamp(2.2rem, 5.6vw, 4.6rem);
  line-height: 1.15;
  color: var(--color-ink);
  margin-bottom: 1.3rem;
}

.fv-tagline-ja {
  font-size: clamp(0.95rem, 1.6vw, 1.15rem);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.fv-foot {
  position: absolute;
  left: 1.5rem;
  bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: "Barlow", sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(0, 0, 0, 0.7);
}

.fv-foot span.fv-foot__divider {
  width: 1px;
  height: 1em;
  background: rgba(0, 0, 0, 0.3);
}

@media (prefers-reduced-motion: no-preference) {
  .fv-tagline-en,
  .fv-tagline-ja,
  .fv-foot {
    opacity: 0;
    transform: translateY(16px);
    animation: fv-rise 0.9s var(--ease-out-soft) forwards;
  }

  .fv-tagline-en { animation-delay: 0.9s; }
  .fv-tagline-ja { animation-delay: 1.2s; }
  .fv-foot { animation-delay: 1.4s; }
}

@keyframes fv-rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .fv {
    padding-top: calc(var(--header-h) + 1.5rem);
  }
}