/* ===================================
   선정 포트폴리오 - TailwindCSS 보조 스타일
   =================================== */

html {
  scroll-behavior: smooth;
}

/* ===================================
   Navigation - Mobile Menu Transition
   =================================== */

.nav-menu {
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.nav-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

@media (min-width: 768px) {
  .nav-menu {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
}

/* ===================================
   Navigation - Link Underline Animation
   =================================== */

.nav-link-anim {
  position: relative;
}

.nav-link-anim::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: #3B82F6;
  transition: width 0.3s ease;
}

.nav-link-anim:hover::after,
.nav-link-anim.active::after {
  width: 100%;
}

/* ===================================
   Scroll Reveal Animations
   =================================== */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===================================
   Timeline Vertical Line
   =================================== */

.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: #D6D3D1;
}

@media (max-width: 767px) {
  .timeline {
    padding-left: 24px;
  }
  .timeline::before {
    left: 5px;
  }
}

/* ===================================
   Progress Bar Fill Animation
   =================================== */

.skill-bar-fill {
  transition: width 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}