.menu-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  width: 100%;
  max-width: 220px;
  margin: 40px auto;
  padding: 14px 20px;

  text-align: center;
  text-decoration: none;

  color: var(--kr-blue);
  background: transparent;

  border: 1.5px solid var(--kr-blue);
  border-radius: 4px;

  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);

  transition:
    background-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.15s ease;
}

@media (max-width: 480px) {
  .menu-button {
    max-width: 260px; 
    margin: 24px auto;  
    padding: 18px 20px; 
  }
}

.menu-button,
.menu-button:hover,
.menu-button:focus,
.menu-button:focus-visible {
  text-decoration: none;
}

.menu-button:hover {
  background-color: rgba(31, 58, 95, 0.06); /* kr-blue の薄塗り */
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.12);
}

.menu-button:focus-visible {
  outline: 2px solid var(--kr-blue);
  outline-offset: 3px;
}

.menu-button:active {
  transform: translateY(1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.menu-button .subtitle {
  font-size: 0.8rem;
  line-height: 1.4;
  opacity: 0.85;
}