/* 기본 전환 효과 (fade-in) */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 모바일 내비게이션 (Tailwind 보완) */
.main-nav {
  /* desktop hides handled by Tailwind; reserve hook */
  width: 100%;
}
@media (max-width: 767px) {
  .main-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: #ffffff;
    display: none;
    flex-direction: column;
    padding: 0.75rem 1rem 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    z-index: 40;
  }
  .main-nav.open {
    display: flex;
    animation: dropdown 0.25s ease;
  }
  .main-nav a {
    padding: 0.65rem 0.5rem;
    border-radius: 0.5rem;
  }
  .main-nav a:active {
    background: #f1f5f9;
  }
}

@keyframes dropdown {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 포커스 스타일: 키보드 사용 시만 */
.using-keyboard a:focus,
.using-keyboard button:focus {
  outline: 3px solid #14b8a6;
  outline-offset: 2px;
}

/* 터치 사용자 tap highlight 줄이기 */
body {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0.08);
}

/* 작은 화면 타이포 최적화 */
@media (max-width: 420px) {
  h1 {
    font-size: 1.9rem !important;
  }
  .hero-text p {
    font-size: 1rem !important;
  }
  .hero-text .flex {
    flex-direction: column;
    gap: 0.75rem;
  }
  .hero-text .flex a {
    width: 100%;
    text-align: center;
  }
}

/* 다크 모드 대비 (미래 확장) */
/* @media (prefers-color-scheme: dark) {
  body {
    background: #0f172a;
    color: #e2e8f0;
  }
  .bg-white {
    background-color: #1e293b !important;
  }
  .text-gray-600 {
    color: #94a3b8 !important;
  }
  footer {
    background: #0f172a;
  }
  .main-nav {
    background: #1e293b;
  }
} */

/* 애니메이션 최소화 선호 대응 */
@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .main-nav.open {
    animation: none;
  }
}