.preview-header {
  height: var(--header-h);
  padding-inline: clamp(24px, 3.2vw, 52px);
  background: rgba(255, 255, 255, 0.97);
  border-bottom-color: var(--color-line);
}

.preview-brand {
  min-height: 44px;
  display: grid;
  align-content: center;
  gap: 5px;
  color: var(--color-ink);
  font-family: var(--font-jp);
  line-height: 1;
}

.preview-brand-main {
  font-size: clamp(15px, 1.2vw, 22px);
  font-weight: 800;
}

.preview-brand-sub {
  color: var(--color-navy-900);
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.preview-nav {
  gap: clamp(22px, 2.1vw, 36px);
  font-family: var(--font-jp);
  font-size: clamp(14px, 0.78vw, 16px);
  font-weight: 500;
  color: var(--color-ink);
}

.preview-nav a {
  position: relative;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-inline: 10px;
}

.preview-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--color-orange-500);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-base) var(--ease-standard);
}

.preview-nav a:hover::after,
.preview-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.preview-tel {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  margin-left: clamp(16px, 2vw, 30px);
  padding: 8px 12px;
  border-color: var(--color-line);
  color: var(--color-navy-900);
  border-radius: 0;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.preview-cta {
  min-height: 56px;
  margin-left: clamp(16px, 2vw, 30px);
  padding-inline: 20px;
  background: var(--color-orange-600);
  border: 1px solid var(--color-orange-600);
  color: var(--color-action-ink);
  font-size: clamp(16px, 0.82vw, 18px);
  letter-spacing: 0.04em;
  transition:
    color var(--duration-base) var(--ease-standard),
    background var(--duration-base) var(--ease-standard);
}

.preview-cta:hover,
.preview-cta:focus-visible {
  background: var(--color-navy-900);
  color: var(--color-white);
  border-color: var(--color-navy-900);
}

.menu-toggle {
  width: 44px;
  height: 44px;
  margin-right: -10px;
}

.menu-toggle span {
  right: 10px;
  left: 10px;
  background: var(--color-orange-500);
}

.menu-toggle span:nth-child(1) { top: 13px; }
.menu-toggle span:nth-child(2) { top: 22px; }
.menu-toggle span:nth-child(3) { top: 31px; }

.mobile-menu {
  min-height: calc(100dvh - var(--header-h));
  padding: clamp(28px, 7vw, 48px) clamp(24px, 7vw, 40px);
  background: var(--color-white);
  color: var(--color-ink);
}

.menu-overlay {
  background: rgba(0, 85, 150, 0.18);
}

.mobile-nav {
  color: var(--color-ink);
}

.mobile-cta {
  background: var(--color-orange-600);
  color: var(--color-action-ink);
}

.mobile-tel {
  color: var(--color-navy-900);
  border: 1px solid var(--color-line);
}

.mobile-nav a {
  min-height: 58px;
  display: flex;
  align-items: center;
  padding-inline: 10px;
  border-bottom-color: var(--color-line);
  color: var(--color-ink);
  font-family: var(--font-jp);
  font-size: clamp(17px, 4.6vw, 21px);
  font-weight: 700;
}

.mobile-nav a:visited {
  color: var(--color-ink);
}

.mobile-nav a:hover,
.mobile-nav a:focus-visible {
  color: var(--color-navy-900);
  background: var(--color-sky-100);
}

.mobile-cta,
.mobile-tel {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  font-family: var(--font-jp);
}

@media (max-width: 1180px) {
  .preview-tel {
    display: none;
  }
}

@media (max-width: 980px) {
  .preview-header {
    height: var(--header-h);
  }

  .preview-cta {
    display: none;
  }

  .menu-toggle {
    display: block;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 64px;
  }

  .preview-header {
    padding-inline: 18px;
  }

  .preview-brand-main {
    font-size: 14px;
  }

  .preview-brand-sub {
    font-size: 8px;
  }
}