@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;800&family=Lora:ital,wght@0,400;0,600;1,400&family=IBM+Plex+Mono&display=swap');

:root {
  /* 테마 컬러 */
  --clr-light: rgb(240, 240, 240);       /* #f0f0f0 - 라이트 배경색 */
  --clr-dark: rgb(35, 35, 35);           /* #232323 - 라이트 텍스트색 / 다크 배경색 */
  --clr-white: #ffffff;                  /* 강조용 완전 화이트 */
  --clr-black: #000000;                  /* 다크 모드 메뉴 블록 호버 배경색 */
  
  /* 경계선 (Border) */
  --clr-light-border: rgb(216, 216, 216); /* #d8d8d8 - 라이트 모드 디바이더 */
  --clr-dark-border: rgb(45, 45, 45);    /* #2d2d2d - 다크 모드 디바이더 */

  /* 코드 블록 */
  --inline-code-bg: #e3e3e3;
  --code-block-bg: #282c34;
  
  /* 메타데이터 / 보조 텍스트 */
  --clr-gray: #808080;

  /* 폰트 패밀리 */
  --ff-heading: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
  --ff-text: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
  --ff-code: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;

  /* 폰트 굵기 */
  --fw-regular: 400;
  --fw-bold: 600;
  --fw-black: 800;

  /* 폰트 사이즈 */
  --fs-s: 0.9rem;      
  --fs-m: 1.125rem;    
  --fs-l: 1.5rem;      
  --fs-xl: 2.25rem;    

  /* 모션 트랜지션 */
  --transition-smooth: 0.5s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-fast: 0.3s ease;
}

body.dark-theme {
  --clr-light: rgb(35, 35, 35);
  --clr-dark: rgb(240, 240, 240);
  --clr-light-border: rgb(45, 45, 45);
  background-color: var(--clr-black);
  color: var(--clr-dark);
}

body.dark-theme .hero-logo {
  filter: invert(1);
}

body.dark-theme .placeholder-box {
  background-color: rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
  :root {
    --fs-s: 0.8rem;
    --fs-m: 1rem;
    --fs-l: 1.35rem;
    --fs-xl: 1.85rem;
  }
}

/* 기본 리셋 및 전역 스타일 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--clr-light);
  color: var(--clr-dark);
  font-family: var(--ff-text);
  font-size: var(--fs-m);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

body.menu-open {
  overflow: hidden; /* 메뉴 오픈 시 스크롤 잠금 */
}

/* 링크 스타일 */
a {
  color: inherit;
  text-decoration: none;
}

/* 레이아웃 도구 */
.narrow {
  width: min(100%, 1440px);
  margin-inline: auto;
}

.padding {
  padding-inline: 3rem;
}

@media (max-width: 768px) {
  .padding {
    padding-inline: 1.5rem;
  }
}

/* 헤더 (Header) */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1100; /* 메뉴 오버레이보다 높게 설정 */
  mix-blend-mode: difference; /* 다크/라이트 대비에 유연하게 대응 */
  color: var(--clr-white); /* 텍스트 흰색 설정(mix-blend-mode로 인해 검은 배경에선 흰색, 흰 배경에선 검은색으로 반전됨) */
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 5rem;
}

.logo {
  font-family: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
  font-weight: var(--fw-regular);
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.theme-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-white);
  width: 2.2rem;
  height: 2.2rem;
  padding: 0;
  transition: transform var(--transition-fast);
}

.theme-toggle-btn:hover {
  transform: scale(1.1);
}

.theme-toggle-btn svg {
  width: 1.35rem;
  height: 1.35rem;
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: block;
}

body.dark-theme .theme-icon-sun {
  display: block;
}

body.dark-theme .theme-icon-moon {
  display: none;
}

/* 햄버거 메뉴 버튼 */
.menu-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 2rem;
  height: 1rem;
  padding: 0;
}

.menu-toggle-btn span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--clr-white);
  transition: transform 0.4s var(--transition-smooth), opacity 0.3s ease;
}

/* 햄버거 메뉴 활성화 상태 */
.menu-open .menu-toggle-btn span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-open .menu-toggle-btn span:nth-child(2) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 풀스크린 오버레이 메뉴 */
.overlay-menu {
  position: fixed;
  inset: 0;
  background-color: var(--clr-white);
  color: var(--clr-dark);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--transition-smooth), background-color 0.4s ease, color 0.4s ease;
  padding: 5rem 2rem 2rem 2rem; /* 헤더 공간 패딩 추가 */
}

body.dark-theme .overlay-menu {
  background-color: var(--clr-black);
  color: var(--clr-light);
}

body.menu-open .overlay-menu {
  opacity: 1;
  pointer-events: auto;
}

.menu-grid {
  display: grid;
  width: 100%;
  height: 100%;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--clr-light-border);
  transition: grid-template-columns 0.6s cubic-bezier(0.25, 1, 0.5, 1),
              grid-template-rows 0.6s cubic-bezier(0.25, 1, 0.5, 1),
              background-color 0.4s ease;
}

body.dark-theme .menu-grid {
  background-color: var(--clr-dark-border);
}

.menu-item {
  background-color: var(--clr-white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2.5rem;
  text-decoration: none;
  color: var(--clr-dark);
  transition: background-color 0.4s ease, color 0.4s ease;
  position: relative;
  overflow: hidden;
}

body.dark-theme .menu-item {
  background-color: var(--clr-black);
  color: var(--clr-white);
}

.menu-item .num {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
}

.menu-item .label {
  font-family: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
  font-size: var(--fs-l);
  font-weight: var(--fw-regular);
  letter-spacing: 0.05em;
  transition: transform 0.4s var(--transition-smooth);
}

.menu-item:hover {
  background-color: var(--clr-light);
}

body.dark-theme .menu-item:hover {
  background-color: rgb(45, 45, 45);
}

.menu-item:hover .label {
  transform: translateX(10px);
}

/* 그리드 영역 지정 (3x3 나선형 배치) */
.item-about       { grid-area: 1 / 1 / 3 / 2; } /* Row 1-2, Col 1 (2x1) */
.item-skills      { grid-area: 1 / 2 / 2 / 4; } /* Row 1, Col 2-3 (1x2) */
.item-projects    { grid-area: 2 / 3 / 4 / 4; } /* Row 2-3, Col 3 (2x1) */
.item-contact     { grid-area: 3 / 1 / 4 / 3; } /* Row 3, Col 1-2 (1x2) */
.item-decor       { grid-area: 2 / 2 / 3 / 3; background-color: var(--clr-black); } /* Row 2, Col 2 (1x1 Center Canvas) */

/* CSS :has() 를 활용한 그리드 크기 유동적 팽창 애니메이션 */
.menu-grid:has(.item-about:hover) {
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  grid-template-rows: 1.4fr 1.4fr 0.8fr;
}
.menu-grid:has(.item-skills:hover) {
  grid-template-columns: 0.8fr 1.4fr 1.4fr;
  grid-template-rows: 1.4fr 0.8fr 0.8fr;
}
.menu-grid:has(.item-projects:hover) {
  grid-template-columns: 0.8fr 0.8fr 1.4fr;
  grid-template-rows: 0.8fr 1.4fr 1.4fr;
}
.menu-grid:has(.item-contact:hover) {
  grid-template-columns: 1.4fr 1.4fr 0.8fr;
  grid-template-rows: 0.8fr 0.8fr 1.4fr;
}

/* 모바일 뷰포트 대응 */
@media (max-width: 768px) {
  .overlay-menu {
    padding: 6rem 1.5rem 2rem 1.5rem;
    overflow-y: auto;
  }
  .item-decor {
    display: flex !important; /* 모바일에서도 노출 */
    justify-content: center !important;
    align-items: center !important;
    height: 80px !important;
    padding: 1rem !important;
    background-color: var(--clr-white) !important;
    border: 1px solid var(--clr-light-border) !important;
    border-radius: 8px !important;
    transition: background-color 0.4s ease, border-color 0.4s ease;
  }
  .item-decor .decor-canvas {
    display: none !important; /* 캔버스 숨김 */
  }
  .item-decor .menu-logo {
    display: block !important;
    position: static !important; /* 둥둥 떠다니는 절대 배치 해제 */
    max-width: 50px !important; /* 모바일 화면에 맞게 작게 축소 */
    height: auto !important;
    animation: none !important; /* 애니메이션 제거 */
    filter: none !important; /* 라이트 모드 기본 검정 */
    opacity: 1 !important;
    transition: filter 0.4s ease;
  }
  .menu-grid {
    display: flex !important; /* Grid 구조 오류 방지를 위해 Flexbox로 강제 전환 */
    flex-direction: column !important;
    gap: 1rem !important;
    background-color: transparent !important;
    height: auto !important;
  }
  .menu-item {
    grid-area: auto !important;
    padding: 1.8rem 1.5rem !important;
    background-color: var(--clr-white) !important;
    border: 1px solid var(--clr-light-border) !important;
    border-radius: 8px !important;
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    color: var(--clr-dark) !important;
    transition: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease !important;
  }
  .menu-item .label {
    font-size: var(--fs-l) !important;
    font-weight: var(--fw-bold) !important;
    transform: none !important;
  }
  .menu-item .num {
    font-size: var(--fs-s) !important;
    color: var(--clr-gray) !important;
    order: 2; /* 번호를 오른쪽에 배치하거나 자연스럽게 유지 */
  }

  /* 모바일 다크모드 대응 */
  body.dark-theme .item-decor {
    background-color: var(--clr-black) !important;
    border: 1px solid var(--clr-dark-border) !important;
  }
  body.dark-theme .item-decor .menu-logo {
    filter: invert(1) !important;
  }
  body.dark-theme .menu-item {
    background-color: var(--clr-black) !important;
    border: 1px solid var(--clr-dark-border) !important;
    color: var(--clr-white) !important;
  }
}

/* 히어로 섹션 (Home Hero) */
.hero-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  padding-top: 5rem;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-family: var(--ff-heading);
  font-weight: var(--fw-black);
  font-size: clamp(3.5rem, 10vw + 1rem, 8rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.hero-subtitle {
  font-family: var(--ff-heading);
  font-size: clamp(1.25rem, 3vw + 0.5rem, 2.5rem);
  font-weight: var(--fw-regular);
  color: var(--clr-gray);
  max-width: 45ch;
  line-height: 1.3;
}

/* 메인 2분할 스플릿 레이아웃 (Subpages) */
.split-layout {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 3rem;
  min-height: calc(100vh - 5rem);
  padding-top: 8rem;
  padding-bottom: 8rem;
  position: relative;
  z-index: 2;
}

.sidebar {
  position: sticky;
  top: 8rem;
  height: fit-content;
}

.sidebar-title {
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  font-size: var(--fs-xl);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2.5rem;
}

.sidebar-menu {
  list-style: none;
}

.sidebar-menu li {
  margin-bottom: 1rem;
}

/* 슬라이드 밑줄 애니메이션 */
.slide-link {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
  text-transform: uppercase;
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
}

.slide-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1.5px;
  background-color: var(--clr-dark);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.slide-link:hover {
  color: var(--clr-dark);
}

.slide-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* 메인 콘텐츠 영역 */
.main-content {
  border-left: 1px solid var(--clr-light-border);
  padding-left: 3rem;
}

/* 콘텐츠 섹션 배치 */
.content-section {
  margin-bottom: 6rem;
}

.content-section:last-child {
  margin-bottom: 0;
}

.section-label {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: block;
}

/* 서브페이지 모바일 화면 대응 */
@media (max-width: 768px) {
  .split-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
    padding-top: 6rem;
    padding-bottom: 4rem;
  }
  .sidebar {
    position: relative;
    top: 0;
  }
  .sidebar-title {
    margin-bottom: 1.5rem;
  }
  .sidebar-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
  .sidebar-menu li {
    margin-bottom: 0;
  }
  .main-content {
    border-left: none;
    border-top: 1px solid var(--clr-light-border);
    padding-left: 0;
    padding-top: 3rem;
  }
}

/* 프로젝트 전용 그리드 컴포넌트 */
/* 프로젝트 전용 그리드 컴포넌트 */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5rem 3rem;
}

.project-card {
  display: block;
  cursor: pointer;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1),
              transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card.large {
  grid-column: span 2;
}

.project-image-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  background-color: var(--clr-light-border);
  transition: border-radius var(--transition-smooth);
}

.project-card.large .project-image-wrapper {
  aspect-ratio: 16 / 9;
}

.project-card:not(.large) .project-image-wrapper {
  aspect-ratio: 1 / 1;
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
  background: var(--gradient-bg, linear-gradient(180deg, #ded0c5 0%, #ebe6de 100%));
}

.badge-arrow {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 3.5rem;
  height: 3.5rem;
  background-color: var(--clr-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-dark);
  transform: scale(0);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.project-card:hover .project-image {
  transform: scale(1.06);
}

.project-card:hover .badge-arrow {
  transform: scale(1);
}

.project-info {
  margin-top: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.project-title {
  font-family: var(--ff-heading);
  font-size: var(--fs-l);
  font-weight: var(--fw-bold);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.project-category {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
}

@media (max-width: 768px) {
  .project-grid {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
  .project-card.large {
    grid-column: auto;
  }
  .project-card.large .project-image-wrapper {
    aspect-ratio: 16 / 10;
  }
  .project-card:not(.large) .project-image-wrapper {
    aspect-ratio: 16 / 10;
  }
}

/* 플레이스홀더 콘텐츠 스타일 */
.placeholder-box {
  width: 100%;
  border: 1px dashed var(--clr-light-border);
  padding: 4rem 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-gray);
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  background-color: rgba(255, 255, 255, 0.3);
}

/* 3D 데코레이션 캔버스 (중앙 그리드용) */
.decor-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.item-decor {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--clr-white);
  transition: background-color 0.4s ease;
}

body.dark-theme .item-decor {
  background-color: var(--clr-black);
}

.menu-logo {
  position: absolute;
  max-width: 50%;    /* 크기를 조금 축소 */
  height: auto;
  z-index: 2;
  pointer-events: none;
  filter: none; /* 라이트 모드 기본 검정 */
  opacity: 1;        /* 투명도 제거 */
  animation: floatLogo 6s ease-in-out infinite;
  transition: filter 0.4s ease;
}

body.dark-theme .menu-logo {
  filter: invert(1); /* 다크 모드 시 흰색으로 반전 */
}

@keyframes floatLogo {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-10px) rotate(1deg);
  }
}

/* 홈 히어로 로고 이미지 스타일 */
.hero-logo-wrapper {
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column; /* 세로 정렬로 변경하여 텍스트가 하단에 위치하도록 설정 */
  justify-content: center;
  align-items: center;
  position: relative;     /* 자식 요소의 절대 배치를 위해 relative 추가 */
  width: 100%;
  max-width: min(90vw, 600px); /* 로고 이미지 크기에 강제 동기화 */
}

.hero-logo {
  width: 100%;
  height: auto;
  opacity: 1; /* 변경: 0.95 -> 1 (사각형과 완벽한 검정색 매칭) */
  pointer-events: none; /* 브라우저 비주얼 검색(Edge/Whale) 방지 */
}

/* Gill Sans Medium 스타일 서브타이틀 */
.hero-subtitle-text {
  font-family: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
  font-weight: 500;    /* Medium 서체 */
  font-size: clamp(0.7rem, 2.3vw, 1.35rem); /* 화면 폭에 따라 유동적으로 크기 변경 (중앙 사각형 가로 폭에 최적화) */
  text-transform: uppercase;
  margin-top: 1.5rem;
  color: var(--clr-dark);
  display: flex;
  justify-content: space-between; /* 글자들을 사각형 크기 내에서 균등하게 퍼뜨려 정확히 좌우 폭에 동기화 */
  width: 31.309%;   /* 로고 전체 대비 중앙 사각형의 폭 비율 (526px / 1680px) */
  left: 35.357%;    /* 로고 전체 대비 중앙 사각형의 시작 위치 비율 (594px / 1680px) */
  position: absolute;
  top: 100%;
  opacity: 0;
  transform: translateY(10px);
  transform-origin: center;
  transition: opacity 0.5s cubic-bezier(0.25, 1, 0.5, 1), 
              transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
  pointer-events: none;
}

.hero-subtitle-text.visible {
  opacity: 1; /* 투명도 제거하여 선명하게 표시 */
  transform: translateY(0);
}

/* Profile & Education Grid styles */
.profile-info-grid, .education-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.profile-info-row, .education-row {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--clr-light-border);
  align-items: baseline;
  transition: border-color var(--transition-fast);
}

.profile-info-row:hover, .education-row:hover {
  border-color: var(--clr-dark);
}

.info-label, .edu-period {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
  text-transform: uppercase;
}

.info-value, .edu-school {
  font-family: var(--ff-text);
  font-size: var(--fs-m);
  color: var(--clr-dark);
  font-weight: var(--fw-regular);
}

.education-row {
  grid-template-columns: 1.2fr 2fr 1fr;
}

.edu-status {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
  text-align: right;
  text-transform: uppercase;
}

.edu-status.highlight {
  color: var(--clr-dark);
  font-weight: var(--fw-bold);
}

.edu-sub {
  font-size: 0.9em;
  opacity: 0.8;
  display: block;
  margin-top: 0.25rem;
}

@media (max-width: 600px) {
  .profile-info-row, .education-row {
    grid-template-columns: 1fr !important;
    gap: 0.5rem;
    padding-bottom: 1rem;
  }
  
  .edu-status {
    text-align: left;
    margin-top: 0.25rem;
  }
}

/* Centered Contact styles */
.contact-centered-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 12rem);
  width: 100%;
  position: relative;
  z-index: 2;
}

.contact-title-hidden {
  display: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  width: 100%;
  max-width: 900px;
  justify-items: center;
  margin-top: 2rem;
}

.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  color: var(--clr-dark);
  text-decoration: none;
  transition: transform var(--transition-smooth);
  width: 100%;
  max-width: 220px;
}

.contact-icon-wrapper {
  width: 5.5rem;
  height: 5.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--clr-light-border);
  border-radius: 50%;
  margin-bottom: 1.5rem;
  background-color: transparent;
  transition: border-color var(--transition-smooth), background-color var(--transition-smooth), transform var(--transition-smooth);
}

.contact-icon {
  width: 2.2rem;
  height: 2.2rem;
  stroke: var(--clr-dark);
  transition: stroke var(--transition-smooth), transform var(--transition-smooth);
}

.contact-label {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
  word-break: break-all;
  transition: color var(--transition-smooth);
}

/* Hover effects */
.contact-item:hover {
  transform: translateY(-8px);
}

.contact-item:hover .contact-icon-wrapper {
  border-color: var(--clr-dark);
  background-color: var(--clr-dark);
}

.contact-item:hover .contact-icon {
  stroke: var(--clr-light);
  transform: scale(1.05);
}

.contact-item:hover .contact-label {
  color: var(--clr-dark);
  font-weight: var(--fw-bold);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .contact-centered-container {
    min-height: auto;
    padding-top: 4rem;
    padding-bottom: 4rem;
  }
}

/* Skills page specific styles */
.skills-main {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  z-index: 2;
}

#skills-physics-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  background: transparent !important;
}

.skills-container-centered {
  position: absolute;
  top: 8rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  pointer-events: none; /* Let clicks pass through to canvas */
  text-align: center;
}

.skills-title-hidden {
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  font-size: var(--fs-xl);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  color: var(--clr-dark);
}

.skills-instructions {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* 프로젝트 상세 모달 스타일 */
.project-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--transition-smooth);
  padding: 2rem;
}

.project-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
}

.modal-container {
  position: relative;
  background-color: var(--clr-light);
  color: var(--clr-dark);
  border: 1px solid var(--clr-light-border);
  width: 100%;
  max-width: 960px;
  height: min(600px, 85vh);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  z-index: 10;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transform: scale(0.95) translateY(15px);
  transition: opacity 0.4s cubic-bezier(0.25, 1, 0.5, 1),
              transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.project-modal.active .modal-container {
  opacity: 1;
  transform: scale(1) translateY(0);
}

/* 닫기 버튼 */
.modal-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--clr-dark);
  cursor: pointer;
  z-index: 20;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.modal-close-btn:hover {
  background-color: var(--clr-light-border);
  transform: rotate(90deg);
}

/* 왼쪽 미디어 영역 */
.modal-media-side {
  width: 100%;
  height: 100%;
  position: relative;
  background-color: var(--clr-black);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-media-side img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-media-side .iframe-container {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: #000;
}

.modal-media-side iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* 오른쪽 세부사항 영역 */
.modal-info-side {
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow-y: auto;
  position: relative;
}

.modal-meta {
  margin-bottom: 1rem;
}

.modal-category {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.modal-title {
  font-family: var(--ff-heading);
  font-size: var(--fs-l);
  font-weight: var(--fw-bold);
  line-height: 1.3;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.modal-description {
  font-family: var(--ff-text);
  font-size: var(--fs-m);
  line-height: 1.7;
  color: var(--clr-dark);
  opacity: 0.85;
  margin-bottom: 2rem;
  white-space: pre-line;
}

/* 추가 링크/버튼 영역 */
.modal-actions {
  display: flex;
  gap: 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--clr-dark);
  color: var(--clr-light);
  padding: 0.75rem 1.5rem;
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover {
  opacity: 0.9;
}

/* 모바일 뷰포트 대응 */
@media (max-width: 768px) {
  .project-modal {
    padding: 1rem;
  }
  
  .modal-container {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1.2fr;
    height: min(750px, 90vh);
  }
  
  .modal-close-btn {
    top: 1rem;
    right: 1rem;
    background-color: rgba(255, 255, 255, 0.7);
    color: #000;
  }
  
  .modal-info-side {
    padding: 2rem 1.5rem;
  }
}

/* 모달 내 갤러리 스타일 */
.modal-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.gallery-thumb {
  width: 4rem;
  height: 3rem;
  object-fit: cover;
  border: 1px solid var(--clr-light-border);
  cursor: pointer;
  transition: opacity var(--transition-fast), border-color var(--transition-fast);
}

.gallery-thumb:hover {
  border-color: var(--clr-dark);
  opacity: 0.8;
}

.video-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--clr-dark);
  color: var(--clr-light);
}

.video-thumb:hover {
  opacity: 0.9;
}

/* ==========================================================================
   Projects Page - Ji Lee Style (pleaseenjoy.com) Layout
   ========================================================================== */

/* 전체 레이아웃 */
body.projects-body {
  overflow-y: auto !important; /* 세로 스크롤 허용 */
  overflow-x: hidden !important;
}

.projects-main-container {
  padding-top: 10rem;
  padding-bottom: 8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
}

/* 상단 중앙 헤더 & 내비게이션 */
.projects-center-header {
  text-align: center;
  margin-bottom: 6rem;
  width: 100%;
}

.projects-main-title {
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  font-size: var(--fs-xl);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  color: var(--clr-dark);
}

.projects-horizontal-nav {
  display: flex;
  justify-content: center;
  gap: 3.5rem;
}

.projects-horizontal-nav .slide-link {
  font-size: var(--fs-m);
  letter-spacing: 0.05em;
  font-weight: var(--fw-regular);
  color: var(--clr-gray);
  text-transform: uppercase;
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
}

.projects-horizontal-nav .slide-link:hover {
  color: var(--clr-dark);
}

/* 메인 콘텐츠 영역 (세로 흐름) */
.projects-main-container .main-content {
  border-left: none !important; /* 왼쪽 디바이더 완벽 제거 */
  padding-left: 0 !important;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8rem; /* 섹션 간 마진 */
}

/* 개별 섹션 스타일 */
.projects-main-container .content-section {
  width: 100%;
  display: flex;
  flex-direction: column;
}

.projects-main-container .section-label {
  font-family: var(--ff-heading);
  font-size: var(--fs-l);
  font-weight: var(--fw-bold);
  color: var(--clr-dark);
  text-transform: uppercase;
  margin-bottom: 3.5rem;
  border-bottom: 1px solid var(--clr-light-border);
  padding-bottom: 1rem;
}

/* 3열 그리드 */
.projects-main-container .project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr) !important; /* 3열 셋업 */
  gap: 5rem 3rem !important;
  width: 100% !important;
}

/* 카드 스타일 */
.projects-main-container .project-card {
  display: block !important;
  cursor: pointer;
  width: 100% !important;
}

/* 3열 대칭형 균등 그리드를 위해 large 속성이 있더라도 1칸을 차지하게 설정 */
.projects-main-container .project-card.large {
  grid-column: span 1 !important;
}

.projects-main-container .project-image-wrapper {
  aspect-ratio: 1 / 1 !important; /* 정사각형 비율 */
}

.projects-main-container .project-card.large .project-image-wrapper {
  aspect-ratio: 1 / 1 !important; /* 큰 카드도 정사각형으로 대칭 일치 */
}

/* 포스터 카테고리 비율 및 잘림 방지 (여백 제거) */
#poster .project-card .project-image-wrapper {
  aspect-ratio: auto !important; /* 고정 비율 해제하여 이미지 고유 종횡비를 따름 */
}

#poster .project-image {
  width: 100% !important;
  height: auto !important;
  display: block !important;
}

/* 정보 표시 영역 (중앙 정렬) */
.projects-main-container .project-info {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center; /* 텍스트 및 레이블 중앙 정렬 */
  text-align: center;
  gap: 0.25rem;
}

.projects-main-container .project-title {
  font-family: var(--ff-heading);
  font-size: var(--fs-m);
  font-weight: var(--fw-bold);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.projects-main-container .project-category {
  font-family: var(--ff-code);
  font-size: var(--fs-s);
  color: var(--clr-gray);
}

/* 모바일/태블릿 디바이스 반응형 스크롤 최적화 */
@media (max-width: 900px) {
  .projects-main-container .project-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

@media (max-width: 600px) {
  .projects-main-container {
    padding-top: 8rem;
  }
  .projects-center-header {
    margin-bottom: 4rem;
  }
  .projects-horizontal-nav {
    flex-direction: row;
    justify-content: center;
    gap: 2rem;
  }
  .projects-main-container .project-grid {
    grid-template-columns: 1fr !important;
    gap: 3rem !important;
  }
  #poster .project-card .project-image-wrapper {
    aspect-ratio: auto !important;
  }
}

/* Projects Page Sticky Left Nav Animation */
.projects-nav-wrapper {
  height: 3rem; /* 메뉴가 fixed로 빠졌을 때 공간 메움용 */
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* 평소에는 symbol-text 숨기기 */
.projects-horizontal-nav .slide-link .symbol-text {
  display: none;
}

/* 스크롤 시 왼쪽 고정(심볼) 스타일 */
.projects-horizontal-nav.sticky-left {
  position: fixed;
  left: 2.5rem;
  top: 50%;
  transform: translateY(-50%);
  flex-direction: column;
  gap: 1.25rem;
  z-index: 1200; /* 헤더(1100)보다 높게 설정 */
  animation: slideInLeftNav 0.4s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes slideInLeftNav {
  0% {
    opacity: 0;
    transform: translateY(-50%) translateX(-30px);
  }
  100% {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }
}

/* sticky-left 상태일 때 텍스트 분기 */
.projects-horizontal-nav.sticky-left .slide-link .full-text {
  display: none;
}

.projects-horizontal-nav.sticky-left .slide-link .symbol-text {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background-color: var(--clr-white);
  color: var(--clr-dark);
  border: 1px solid var(--clr-light-border);
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  font-size: 0.9rem;
  text-transform: uppercase;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

/* 다크 테마 시 스티키 버튼 스타일 */
body.dark-theme .projects-horizontal-nav.sticky-left .slide-link .symbol-text {
  background-color: var(--clr-black);
  color: var(--clr-light);
  border: 1px solid var(--clr-dark-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* 스티키 버튼 호버 시 효과 */
.projects-horizontal-nav.sticky-left .slide-link:hover .symbol-text {
  background-color: var(--clr-dark);
  color: var(--clr-light);
  border-color: var(--clr-dark);
  transform: scale(1.08);
}

body.dark-theme .projects-horizontal-nav.sticky-left .slide-link:hover .symbol-text {
  background-color: var(--clr-light);
  color: var(--clr-dark);
  border-color: var(--clr-light);
}

/* 슬라이드 밑줄 애니메이션은 sticky 상태일 땐 제거 */
.projects-horizontal-nav.sticky-left .slide-link::after {
  display: none;
}

/* 모바일 뷰포트에서 sticky-left 위치 및 크기 최적화 */
@media (max-width: 768px) {
  .projects-horizontal-nav.sticky-left {
    left: 1rem;
    gap: 0.8rem;
  }
  .projects-horizontal-nav.sticky-left .slide-link .symbol-text {
    width: 2.2rem;
    height: 2.2rem;
    font-size: 0.8rem;
  }
}