/* =========================================
   1. 전역 컬러 테마 정의 (CSS 변수 시스템)
========================================= */
/* ☀️ 라이트모드 기본 색상 조합 */
:root {
  --body-bg: #ffffff;
  --text-main: #2c3e50;
  --text-muted: #7f8c8d;
  --title-color: #2c3e50;
  --border-color: #f1f2f6;
  --card-bg: #f8f9fa;
  
  --accent-blue: #3498db;
  --accent-blue-hover: #2980b9;
  --accent-green: #2ecc71;
  --accent-green-hover: #27ae60;
  
  --badge-bg: #eaf2f8;
  --badge-text: #2980b9;
  --toggle-text: #555555;
}

/* 🌙 다크모드 색상 조합 (Quarto 및 Bootstrap 테마 완벽 대응) */
html[data-bs-theme="dark"],
html[data-mode="dark"],
body.quarto-dark {
  --body-bg: #111111;
  --text-main: #dddddd;
  --text-muted: #a0aab2;
  --title-color: #ffffff;      /* 다크모드 시 모든 타이틀을 순백색으로 고정 */
  --border-color: #2c2c2c;
  --card-bg: #1a1a1a;          /* 어두운 카드 배경 */
  
  --accent-blue: #5dade2;
  --accent-blue-hover: #2980b9;
  --accent-green: #2ecc71;
  --accent-green-hover: #27ae60;
  
  --badge-bg: #1f3a4e;
  --badge-text: #5dade2;
  --toggle-text: #ffffff;
}

/* =========================================
   2. 전체 타이포그래피 및 기본 글씨 적용
========================================= */
body {
  font-size: 1.5rem !important;   
  line-height: 1.9;              
  color: var(--text-main) !important;
  background-color: var(--body-bg) !important;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  overflow-y: scroll;            
}

/* 모든 헤더 타이틀 색상 강제 동기화 */
h1, h2, h3, h4, h5, h6 {
  color: var(--title-color) !important;
  font-weight: 700;
}

h2 {
  font-size: 2.0rem !important;
  margin-top: 4rem;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color) !important;
}

/* =========================================
   3. 상단 메뉴바 및 토글 버튼
========================================= */
.navbar {
  padding-top: 20px !important;   
  padding-bottom: 18px !important;
  transition: none !important;    
}
.navbar-brand {
  font-size: 1.7rem !important;   
  font-weight: 700 !important;
  color: var(--title-color) !important;
}
.navbar-nav .nav-link {
  font-size: 1.4rem !important;  
  font-weight: 500;
  margin-left: 20px;
  color: var(--text-muted) !important;
}
.navbar-nav .nav-link:hover {
  color: var(--title-color) !important;
}

/* 토글 버튼 박스 */
.quarto-color-scheme-toggle {
  width: 110px !important; 
  display: flex !important;
  justify-content: center;
  align-items: center;
}
.quarto-color-scheme-toggle .bi { display: none !important; }

.quarto-color-scheme-toggle::after {
  content: "DARK 🌙";
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--toggle-text) !important;
  cursor: pointer;
}
html[data-bs-theme="dark"] .quarto-color-scheme-toggle::after,
html[data-mode="dark"] .quarto-color-scheme-toggle::after,
body.quarto-dark .quarto-color-scheme-toggle::after {
  content: "LIGHT ☀️" !important;
}

/* =========================================
   4. 상단 프로필 영역
========================================= */
.profile-container {
  display: flex;
  align-items: center;
  gap: 50px;
  margin-top: 40px;
  margin-bottom: 30px;
}
.profile-image-box { flex: 0 0 180px; }
.profile-img {
  width: 240px; height: 240px;
  object-fit: cover; border-radius: 50%; 
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}
.profile-text-box h1 { font-size: 2.8rem; margin-bottom: 5px; }
.profile-text-box h3 { font-size: 1.45rem; color: var(--text-muted) !important; margin-bottom: 12px; }

/* Field 태그 */
.profile-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px; 
  margin-bottom: 15px; 
}
.profile-keywords span {
  background-color: var(--badge-bg) !important; 
  color: var(--badge-text) !important; 
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 1.05rem;
  font-weight: 600;
}

/* 소셜 링크 */
.profile-social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 15px;
}
.profile-social-links a {
  display: inline-block;
  padding: 7px 15px;
  border: 1px solid var(--border-color);
  background-color: var(--card-bg);
  border-radius: 20px;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text-main);
  transition: all 0.2s ease;
}
.profile-social-links a:hover { 
  background-color: var(--text-main); 
  color: var(--body-bg); 
}

/* =========================================
   5. Abstract 고정 박스 디자인
========================================= */
.abstract-box {
  background-color: var(--card-bg) !important;
  border-left: 5px solid var(--accent-blue) !important;
  color: var(--text-main) !important;
  padding: 18px 24px;
  margin: 15px 0 35px 0;
  border-radius: 0 8px 8px 0;
  font-size: 1.2rem; 
  line-height: 1.8;
}

/* =========================================
   6. CV 페이지 (그리드 및 추천서)
========================================= */
.btn-cv-download {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--accent-blue);
  color: #ffffff !important;
  text-decoration: none;
  border-radius: 6px;
  font-size: 1.05rem;
  font-weight: 600;
  transition: background-color 0.2s;
}
.btn-cv-download:hover { background-color: var(--accent-blue-hover); }

.education-grid { display: flex; flex-direction: column; gap: 20px; margin-top: 20px; }
.edu-row { display: flex; border-bottom: 1px dashed var(--border-color) !important; padding-bottom: 15px; }
.edu-year { flex: 0 0 160px; font-size: 1.2rem; color: var(--accent-blue) !important; font-weight: 600; }
.edu-degree { color: var(--text-muted) !important; font-style: italic; }

.reference-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 25px; margin-top: 20px; }
.ref-card {
  background-color: var(--card-bg) !important;
  padding: 22px;
  border-radius: 8px;
  border: 1px solid var(--border-color) !important;
  line-height: 1.7;
  color: var(--text-main) !important;
}
.ref-chair { font-size: 1rem; color: #e74c3c !important; font-weight: 600; }
.ref-card i { color: var(--text-muted); margin-right: 5px; }

/* =========================================
   7. Research 페이지 논문 리스트
========================================= */
.paper-item { margin-bottom: 45px; padding-bottom: 35px; border-bottom: 1px solid var(--border-color); }
.paper-item:last-child { border-bottom: none; }
.paper-item h3 { font-size: 1.55rem; margin-top: 0; margin-bottom: 8px; line-height: 1.4; }
.paper-item em { color: var(--text-muted) !important; }

.paper-links { display: flex; flex-wrap: wrap; gap: 12px; margin: 15px 0; }
.btn-paper {
  display: inline-block;
  padding: 6px 14px;
  border: 1.5px solid var(--accent-blue) !important;
  background-color: transparent !important;
  color: var(--accent-blue) !important;
  text-decoration: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s ease-in-out;
}
.btn-paper:hover { background-color: var(--accent-blue) !important; color: #ffffff !important; }
.btn-paper i { margin-right: 6px; color: var(--accent-blue) !important; }
.btn-paper:hover i { color: #ffffff !important; }

.paper-abstract {
  background-color: var(--card-bg) !important;
  padding: 16px 20px;
  border-left: 4px solid var(--text-muted) !important;
  border-radius: 0 6px 6px 0;
  font-size: 1.15rem;
  color: var(--text-main) !important;
  line-height: 1.7;
}

/* =========================================
   8. Teaching 페이지 (과목 카드 및 아코디언)
========================================= */
.teaching-grid { display: flex; flex-direction: column; gap: 15px; margin-top: 25px; }
.teach-row {
  display: flex;
  justify-content: space-between; 
  align-items: center;
  padding: 20px 25px;
  background-color: var(--card-bg) !important;
  border-left: 5px solid var(--accent-green) !important;
  border-radius: 0 8px 8px 0;
  transition: transform 0.2s ease;
}
.teach-row:hover { transform: translateX(5px); }
.teach-details { font-size: 1.3rem; color: var(--title-color) !important; line-height: 1.4; }
.teach-role { font-size: 1.05rem; color: var(--text-muted) !important; font-style: italic; display: inline-block; margin-top: 4px; }
.teach-role i { margin-right: 5px; }

.teach-terms-wrapper { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; max-width: 40%; }
.term-badge {
  display: inline-block;
  padding: 6px 12px;
  background-color: var(--badge-bg) !important;
  color: var(--badge-text) !important;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 20px;
  border: 1px solid var(--border-color) !important;
  white-space: nowrap;
}

/* 평가 요약 스탯 */
.eval-stats-container { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin: 20px 0 25px 0; }
.eval-stat-box {
  background-color: var(--card-bg) !important;
  border-top: 4px solid var(--accent-green) !important;
  border-left: 1px solid var(--border-color) !important;
  border-right: 1px solid var(--border-color) !important;
  border-bottom: 1px solid var(--border-color) !important;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
}
.eval-stat-box strong { display: block; font-size: 1.8rem; color: var(--title-color) !important; margin-bottom: 5px; }
.stat-label { font-size: 0.95rem; color: var(--text-muted) !important; font-weight: 600; }

.btn-eval-download {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--accent-green);
  color: white !important;
  text-decoration: none !important;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s ease-in-out;
}
.btn-eval-download:hover { background-color: var(--accent-green-hover); }

/* 아코디언 교재영역 */
.material-details { background-color: var(--card-bg) !important; border: 1px solid var(--border-color) !important; border-radius: 8px; margin-bottom: 12px; overflow: hidden; }
.material-summary { padding: 15px 20px; background-color: var(--card-bg) !important; cursor: pointer; display: flex; justify-content: space-between; align-items: center; color: var(--title-color) !important; list-style: none; }
.material-summary::-webkit-details-marker { display: none; }
.summary-title { font-size: 1.15rem; }
.summary-title i { margin-right: 10px; color: var(--accent-green) !important; }
.summary-toggle { font-size: 0.85rem; color: var(--text-muted) !important; }
.material-content { padding: 20px; border-top: 1px solid var(--border-color) !important; line-height: 1.8; font-size: 1.1rem; color: var(--text-main) !important;}
.material-content a { color: var(--accent-blue) !important; }

/* =========================================
   9. 모바일 반응형 디바이스 대응
========================================= */
@media (max-width: 768px) {
  .profile-container { flex-direction: column; text-align: center; gap: 20px; }
  .profile-image-box { flex: 0 0 180px; } 
  .edu-row { flex-direction: column; gap: 5px; }
  .edu-year { flex: none; }
  .reference-grid { grid-template-columns: 1fr; }
  .teach-row { flex-direction: column; align-items: flex-start; gap: 15px; }
  .teach-terms-wrapper { justify-content: flex-start; max-width: 100%; }
  .eval-stats-container { grid-template-columns: 1fr; }
}