/* top ページのスクロールロックを解除 */
html,
body {
  overflow: auto;
  height: auto;
}

/* ── Header: PC ナビ ── */
.header__nav-pc {
  display: flex;
  align-items: center;
  gap: 80px;
}

.header__nav-pc .nav-link {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: color 0.15s ease;
}

.header__nav-pc .nav-link:hover {
  color: #666;
}

/* ── ハンバーガー ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-primary);
  transition: transform 0.25s ease;
}

.hamburger.is-open span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.hamburger.is-open span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ── モバイルナビ ── */
.mobile-nav {
  padding: 28px var(--page-padding);
  border-bottom: 1px solid var(--color-primary);
  background: var(--color-bg);
}

.mobile-nav__link {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding-bottom: 28px;
}

.mobile-nav__link:last-child {
  padding-bottom: 0;
}

/* ── About ── */
.about {
  padding: 0 var(--page-padding) 120px;
}

.about__title {
  font-size: 84px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-top: 86px;
  margin-bottom: 72px;
}

.about__body {
  max-width: 690px;
}

.about__name {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 20px;
}

.about__bio {
  font-size: 13px;
  line-height: 1.9;
  margin-bottom: 40px;
}

.about__divider {
  border: none;
  border-top: 1px solid var(--color-primary);
  margin-bottom: 40px;
}

.about__profile {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.about__profile-item {
  display: flex;
  gap: 24px;
  font-size: 13px;
  line-height: 1.6;
}

.about__profile-item dt {
  font-weight: 400;
  flex-shrink: 0;
}

.about__profile-item dd {
  font-weight: 700;
}

.about__contact-link {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: opacity 0.15s ease;
}

.about__contact-link:hover {
  opacity: 0.5;
}

/* ── SP (≤768px) ── */
@media (max-width: 768px) {
  :root {
    --page-padding: 15px;
    --header-height: 58px;
  }

  .header__nav-pc {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .about__title {
    font-size: 52px;
    margin-top: 70px;
    margin-bottom: 48px;
  }

  .about__body {
    max-width: 100%;
  }

  .about__bio {
    font-size: 12px;
  }

  .about__profile-item {
    font-size: 12px;
  }

  .about__contact {
    font-size: 12px;
  }
}