/* ===== Header ===== */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  backdrop-filter: blur(14px);
  background: rgba(251, 253, 254, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.header.is-scrolled { border-bottom-color: var(--color-border); background: rgba(251,253,254,0.92); }
.header__inner {
  max-width: var(--maxw);
  height: 100%;
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}

/* Wordmark */
.wordmark { display: inline-flex; align-items: baseline; gap: 4px; }
.wordmark__text {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 1.75rem;
  letter-spacing: -0.04em;
  color: var(--color-primary);
  line-height: 1;
}
.wordmark__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-secondary);
}
.wordmark--light .wordmark__text { color: #fff; }

/* Nav */
.nav__list { display: flex; gap: 28px; }
.nav__list a {
  font-size: 0.92rem; font-weight: 500; color: var(--color-ink);
  transition: color 0.2s;
}
.nav__list a:hover { color: var(--color-primary); }
.nav__cta { display: inline-flex; }
.nav__toggle { display: none; }

@media (max-width: 900px) {
  .nav, .nav__cta { display: none; }
  .nav__toggle {
    display: flex; flex-direction: column; gap: 5px; padding: 8px;
  }
  .nav__toggle span { width: 22px; height: 2px; background: var(--color-ink); border-radius: 2px; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 999px;
  font-family: var(--font-jp-head);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.3s;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px) scale(1.02); }
.btn--small { padding: 10px 20px; font-size: 0.85rem; }
.btn--primary {
  background: var(--gradient-cta);
  color: #fff;
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
  box-shadow: 0 6px 20px rgba(14,107,168,0.25);
}
.btn--primary:hover { box-shadow: 0 10px 30px rgba(14,107,168,0.35); }
.btn--ghost {
  background: rgba(255,255,255,0.7);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: var(--color-primary); color: #fff; }
.btn--ghost-light {
  background: transparent; color: #fff; border-color: rgba(255,255,255,0.6);
}
.btn--ghost-light:hover { background: #fff; color: var(--color-primary); }

.btn--tel {
  flex-direction: column;
  background: #fff;
  color: var(--color-primary);
  padding: 18px 40px;
  box-shadow: var(--shadow-lg);
  gap: 4px;
}
.btn__tel-label { font-size: 0.78rem; font-weight: 500; color: var(--color-slate); letter-spacing: 0.05em; }
.btn__tel-num { font-family: var(--font-en); font-size: 1.8rem; font-weight: 800; letter-spacing: 0.02em; }

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ===== Animations: Fade & Slide ===== */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.9s ease, transform 0.9s ease; }
.fade-in.is-visible { opacity: 1; transform: translateY(0); }

.slide-in-left { opacity: 0; transform: translateX(-60px); transition: opacity 1s ease, transform 1s ease; }
.slide-in-left.is-visible { opacity: 1; transform: translateX(0); }
.slide-in-right { opacity: 0; transform: translateX(60px); transition: opacity 1s ease, transform 1s ease; }
.slide-in-right.is-visible { opacity: 1; transform: translateX(0); }

/* ===== Footer ===== */
.footer {
  background: var(--gradient-dark);
  color: rgba(255,255,255,0.85);
  padding-block: 60px 40px;
}
.footer__top {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 24px;
  padding-bottom: 32px; margin-bottom: 24px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer__nav { display: flex; flex-wrap: wrap; gap: 24px; }
.footer__nav a { font-size: 0.9rem; transition: color 0.2s; }
.footer__nav a:hover { color: var(--color-primary-light); }
.footer__copy {
  font-family: var(--font-en);
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  text-align: center;
}