.topbar-inner {
  position: relative;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.28);
  cursor: pointer;
}

.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  display: block;
  width: 18px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle-lines {
  position: relative;
  margin: auto;
}

.menu-toggle-lines::before,
.menu-toggle-lines::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-toggle-lines::before { top: -6px; }
.menu-toggle-lines::after { top: 6px; }

.topbar.is-menu-open .menu-toggle-lines { background: transparent; }
.topbar.is-menu-open .menu-toggle-lines::before { transform: translateY(6px) rotate(45deg); }
.topbar.is-menu-open .menu-toggle-lines::after { transform: translateY(-6px) rotate(-45deg); }

.menu-toggle:focus-visible,
.nav a:focus-visible,
.project-pagination a:focus-visible {
  outline: 3px solid rgba(185, 121, 65, 0.42);
  outline-offset: 3px;
}

/* The wording remains unchanged; only the reading rhythm becomes clearer. */
#education .education-card > p,
.book-text > p {
  max-width: 1160px;
}

#education .education-card > p:first-of-type {
  margin-top: 12px;
  color: #332e29;
  font-family: var(--serif);
  font-size: clamp(22px, 2.05vw, 28px);
  line-height: 1.48;
}

#education .education-card > p + p,
.book-text > p + p {
  margin-top: 1.5em;
}

.book-text > p:first-of-type {
  color: #332e29;
  font-size: clamp(20px, 1.65vw, 23px);
  line-height: 1.56;
}

.project-pagination {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: clamp(58px, 8vw, 100px);
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.project-pagination a {
  display: flex;
  min-height: 150px;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 26px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.22);
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.project-pagination a:last-child { text-align: right; }
.project-pagination a:hover {
  border-color: rgba(185, 121, 65, 0.36);
  background: rgba(255, 255, 255, 0.48);
  transform: translateY(-2px);
}

.project-pagination span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.project-pagination strong {
  font-family: var(--serif);
  font-size: clamp(27px, 3.1vw, 42px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1;
}

@media (max-width: 980px) {
  .menu-toggle {
    display: grid;
    flex: 0 0 auto;
    place-items: center;
  }

  .topbar-tools { gap: 12px; }

  .topbar .nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 50%;
    display: flex;
    width: 100vw;
    max-height: calc(100vh - 76px);
    max-height: calc(100svh - 76px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 18px 18px;
    overflow-y: auto;
    border-bottom: 1px solid var(--line);
    background: rgba(243, 239, 231, 0.98);
    box-shadow: 0 20px 45px rgba(24, 20, 16, 0.14);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -8px);
    visibility: hidden;
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
    backdrop-filter: blur(24px);
  }

  .topbar .nav a {
    padding: 13px 4px;
    border-bottom: 1px solid var(--line);
    font-family: var(--serif);
    font-size: 25px;
    font-weight: 400;
    line-height: 1.1;
  }

  .topbar .nav a:last-child { border-bottom: 0; }

  .topbar.is-menu-open .nav {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, 0);
    visibility: visible;
  }
}

@media (max-width: 640px) {
  .language-switch { font-size: 12px; }
  .menu-toggle { width: 40px; height: 40px; }
  #education .education-card > p:first-of-type {
    font-size: 20px;
    line-height: 1.55;
  }
  .book-text > p:first-of-type { font-size: 19px; }
  .project-pagination { grid-template-columns: 1fr; }
  .project-pagination a { min-height: 126px; padding: 20px; }
  .project-pagination a:last-child { text-align: left; }
  .project-pagination strong { font-size: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  .menu-toggle-lines,
  .menu-toggle-lines::before,
  .menu-toggle-lines::after,
  .topbar .nav,
  .project-pagination a { transition: none; }
}