/* ===== 변수: 다크(기본) ===== */
:root {
  --bg: #08080c;
  --bg-card: #0f0f14;
  --bg-card-hover: #14141c;
  --text: #ececf0;
  --text-muted: #8a8aa2;
  --accent: #00d4aa;
  --accent-bright: #00e6b8;
  --accent-dim: rgba(0, 212, 170, 0.12);
  --accent-glow: rgba(0, 212, 170, 0.25);
  --border: rgba(255, 255, 255, 0.07);
  --header-bg: rgba(8, 8, 12, 0.82);
  --header-bg-scroll: rgba(8, 8, 12, 0.96);
  --font: 'Outfit', sans-serif;
  --radius: 14px;
  --radius-lg: 18px;
  --transition: 0.28s ease;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.25), 0 0 0 1px var(--accent);
}

/* ===== 라이트 모드 ===== */
[data-theme="light"] {
  --bg: #f2f2f6;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafc;
  --text: #16161d;
  --text-muted: #5a5a6e;
  --accent: #008f72;
  --accent-bright: #00997a;
  --accent-dim: rgba(0, 153, 122, 0.1);
  --accent-glow: rgba(0, 153, 122, 0.2);
  --border: rgba(0, 0, 0, 0.07);
  --header-bg: rgba(242, 242, 246, 0.88);
  --header-bg-scroll: rgba(242, 242, 246, 0.98);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--accent);
}

[data-theme="light"] .hero-title .accent {
  background: linear-gradient(135deg, #008f72, #00a884);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: none;
}

[data-theme="light"] .project-card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* ===== 리셋 & 기본 ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  position: relative;
  font-family: var(--font);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
  background-attachment: scroll;
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 그리드 칸 호버: 커서 있는 칸만 살짝 어두움 (스크롤·다크 모드 대응) */
.grid-hover-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 100%;
  z-index: 0;
  pointer-events: none;
  display: grid;
  grid-template-columns: repeat(var(--grid-cols, 60), 32px);
  grid-template-rows: repeat(var(--grid-rows, 40), 32px);
  align-content: start;
  justify-content: start;
}

.grid-hover-cell {
  width: 32px;
  height: 32px;
  background: transparent;
  transition: background 0.2s ease;
}

/* 스포트라이트: 다크 모드 — 얕은 민트색(액센트)으로 칸이 살짝 밝아짐 */
.grid-hover-cell.hover-ring-0 {
  background: rgba(0, 212, 170, 0.12);
}
.grid-hover-cell.hover-ring-1 {
  background: rgba(0, 212, 170, 0.06);
}
.grid-hover-cell.hover-ring-2 {
  background: rgba(0, 212, 170, 0.02);
}

/* 라이트 모드 — 살짝 어두운 톤 유지 */
[data-theme="light"] .grid-hover-cell.hover-ring-0 {
  background: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .grid-hover-cell.hover-ring-1 {
  background: rgba(0, 0, 0, 0.04);
}
[data-theme="light"] .grid-hover-cell.hover-ring-2 {
  background: rgba(0, 0, 0, 0.02);
}

/* ===== 오른쪽 리모컨: 선으로 이어진 점, 호버 시 섹션명 표시 ===== */
.page-remote {
  position: fixed;
  top: 50%;
  right: 0;
  transform: translate(100%, -50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 1.5rem 0;
  min-height: 280px;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: 14px 0 0 14px;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
  transition: transform 0.35s ease, opacity 0.35s ease;
  opacity: 0;
  pointer-events: none;
}

.page-remote.visible {
  transform: translate(0, -50%);
  opacity: 1;
  pointer-events: auto;
}

/* 점들을 잇는 세로선 */
.remote-line {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: calc(100% - 2rem);
  background: linear-gradient(to bottom, transparent, var(--border), var(--border), transparent);
  border-radius: 1px;
  pointer-events: none;
}

.remote-dot {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 28px;
  padding: 0;
  margin: 0;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: 0;
  transition: var(--transition);
  z-index: 1;
}

.remote-dot-inner {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.5;
  transition: var(--transition);
}

.remote-dot:hover .remote-dot-inner {
  opacity: 0.9;
  background: var(--text);
  transform: scale(1.15);
}

/* 현재 섹션: 민트색으로 빛남 */
.remote-dot.active .remote-dot-inner {
  width: 12px;
  height: 12px;
  background: var(--accent);
  opacity: 1;
  box-shadow: 0 0 12px var(--accent-glow), 0 0 24px rgba(0, 212, 170, 0.25);
}

[data-theme="light"] .remote-dot.active .remote-dot-inner {
  box-shadow: 0 0 10px var(--accent-glow), 0 0 20px rgba(0, 153, 122, 0.2);
}

/* 호버 시 동그라미 옆에 섹션명 표시 */
.remote-label {
  position: absolute;
  right: 100%;
  margin-right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.remote-dot:hover .remote-label,
.remote-dot.active .remote-label {
  opacity: 1;
}

.remote-dot:hover .remote-label {
  color: var(--text);
}

.remote-dot.active .remote-label {
  color: var(--accent);
}

/* 그리드 위에 콘텐츠가 보이도록 */
main,
.footer {
  position: relative;
  z-index: 1;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }

/* ===== 헤더 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: transform 0.35s ease, background var(--transition);
}

.header.scrolled { background: var(--header-bg-scroll); }

/* 스크롤 내렸을 때 상단바 숨김 */
.header.remote-mode {
  transform: translateY(-100%);
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  line-height: 1.2;
  display: inline-flex;
  align-items: center;
  color: var(--text);
  transition: color var(--transition);
}

.logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-links > li {
  display: flex;
  align-items: center;
}

.nav-lang-wrap {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.lang-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 28px;
  padding: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  overflow: hidden;
}

.lang-btn img {
  width: 22px;
  height: 15px;
  object-fit: cover;
  display: block;
}

.lang-btn:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.lang-btn.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 0 1px var(--accent);
}

.nav-theme-wrap {
  display: flex;
  align-items: center;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

/* 테마 토글 버튼 */
.theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 0 1px var(--accent);
}

.theme-icon {
  position: absolute;
  font-size: 1.1rem;
  line-height: 1;
  transition: opacity var(--transition), transform var(--transition);
}

.theme-icon.moon { opacity: 1; }
.theme-icon.sun { opacity: 0; }

[data-theme="light"] .theme-icon.moon { opacity: 0; }
[data-theme="light"] .theme-icon.sun { opacity: 1; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: var(--transition);
}

/* ===== 히어로 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  max-width: 920px;
  margin: 0 auto;
  position: relative;
}

.hero-label {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  opacity: 0;
  animation: fadeUp 0.8s ease forwards;
}

.hero-title {
  font-size: clamp(2.75rem, 6.5vw, 4.25rem);
  font-weight: 700;
  line-height: 1.12;
  margin: 0 0 1.25rem;
  letter-spacing: -0.03em;
}

.hero-title .line {
  display: block;
  opacity: 0;
  animation: fadeUp 0.7s ease forwards;
}

.hero-title .line:nth-child(1) { animation-delay: 0.15s; }
.hero-title .line:nth-child(2) { animation-delay: 0.3s; }
.hero-title .line:nth-child(3) { animation-delay: 0.45s; }

.hero-title .accent {
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent), #00a884);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px var(--accent-glow));
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 0 1rem;
  line-height: 1.6;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.5s forwards;
}

.hero-focus-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.5rem;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.55s forwards;
}

.hero-focus-list {
  margin: 0 0 2.25rem;
  padding-left: 1.35rem;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  list-style: disc;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.6s forwards;
}

.hero-focus-list li { margin-bottom: 0.3rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.95rem 2rem;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: var(--transition);
  opacity: 0;
  animation: fadeUp 0.7s ease 0.75s forwards;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: none;
  box-shadow: var(--shadow-card);
}

.btn-primary:hover {
  background: var(--accent-bright);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px var(--accent-glow);
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.9s forwards;
}

.scroll-line {
  width: 2px;
  height: 44px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  border-radius: 2px;
  animation: scrollPulse 2s ease infinite;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

/* ===== 섹션 공통 ===== */
.section {
  position: relative;
  max-width: 920px;
  margin: 0 auto;
  padding: 5.5rem 2rem;
}


.section-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 2.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-title::before {
  content: '';
  width: 2.5rem;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 1px;
}

/* ===== About ===== */
.about-wrap {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.about-photo-wrap {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent);
  box-shadow: var(--shadow-card), 0 0 0 1px var(--border);
  background: var(--bg-card);
}

.about-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-content {
  flex: 1;
  min-width: 280px;
  max-width: 640px;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.about-subtitle {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.75rem 0 0.5rem;
  letter-spacing: 0.02em;
}
.about-subtitle:first-of-type { margin-top: 0; }
.about-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin: 0 0 0.5rem;
}

.about-list {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  list-style: disc;
}

.about-list li { margin-bottom: 0.4rem; }

/* ===== Education ===== */
.edu-card {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.edu-card:hover,
.section.visible .edu-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}
.edu-logo-wrap {
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 0.5rem;
  border: 1px solid var(--border);
}
.edu-logo {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.edu-body h3 { font-size: 1.2rem; margin: 0 0 0.25rem; }
.edu-degree { font-weight: 600; color: var(--accent); margin: 0 0 0.5rem; line-height: 1.5; }
.edu-meta { font-size: 0.95rem; color: var(--text-muted); margin: 0 0 0.75rem; line-height: 1.6; }

.edu-desc-list {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  list-style: disc;
}

.edu-desc-list li { margin-bottom: 0.25rem; }

/* ===== Work Experience ===== */
.work-list { display: flex; flex-direction: column; gap: 2rem; }
.work-card {
  display: flex;
  gap: 1.75rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.work-card:hover,
.section.visible .work-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}
.work-logo-wrap {
  flex-shrink: 0;
  width: 92px;
  height: 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 0.5rem;
  border: 1px solid var(--border);
}
.work-logo {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.work-body { flex: 1; min-width: 0; }
.work-body h3 { font-size: 1.15rem; margin: 0 0 0.35rem; }
.work-org {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}
.work-meta-list {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  list-style: disc;
}
.work-meta-list li { margin-bottom: 0.35rem; }
.work-meta-list a {
  color: var(--accent);
  font-weight: 500;
  transition: var(--transition);
}
.work-meta-list a:hover { color: var(--accent-bright); }
.work-lab-link {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.75rem;
  transition: var(--transition);
}
.work-lab-link:hover { color: var(--accent-bright); }

.content-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.content-card:hover,
.section.visible .content-card:hover,
.patent-card:hover,
.section.visible .patent-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}

.card-cta {
  display: inline-block;
  margin-top: 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  transition: var(--transition);
}
.card-cta:hover { color: var(--accent-bright); }

/* ===== Publications (category + paper cards) ===== */
.pub-cat-card {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding: 0.7rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.06em;
  box-shadow: var(--shadow-card);
}
.pub-cat-card:first-of-type { margin-top: 0; }

.paper-card {
  padding: 1.4rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.paper-card:hover,
.section.visible .paper-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}
.paper-card:last-of-type { margin-bottom: 0; }
.paper-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  line-height: 1.45;
}
.paper-authors, .paper-venue {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 0.25rem;
  line-height: 1.55;
}
.paper-venue { margin-bottom: 0; }
.paper-author-me {
  color: var(--accent);
  font-weight: 600;
}
.paper-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  transition: var(--transition);
}
.paper-link:hover { color: var(--accent-bright); }

/* ===== Project tag ===== */
.project-tag {
  font-size: 0.8rem;
  color: var(--accent);
  margin: 0 0 0.5rem;
  font-weight: 500;
}

/* ===== Awards (timeline: left line + dates, right cards) ===== */
.awards-timeline {
  position: relative;
  padding-left: 6rem;
}
.awards-line {
  position: absolute;
  left: 1.1rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--border);
  border-radius: 1px;
}
.award-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.award-item:last-child { margin-bottom: 0; }
.award-date-wrap {
  position: relative;
  flex-shrink: 0;
  width: 4.5rem;
  margin-left: -6rem;
  text-align: right;
}
.award-dot {
  position: absolute;
  left: 1.1rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  box-sizing: border-box;
}
.award-date {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  margin-left: 2rem;
}
.award-card {
  flex: 1;
  min-width: 0;
  padding: 1.4rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.award-card:hover,
.section.visible .award-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}
.award-cert-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  transition: var(--transition);
}
.award-cert-link:hover { color: var(--accent-bright); }
.award-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.4;
}
.award-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0 0 0.5rem;
}
.award-org {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  margin: 0;
}

/* ===== Patent ===== */
.patent-card {
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.patent-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.5;
}
.patent-authors, .patent-meta {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0 0 0.25rem;
}
.patent-meta { margin-bottom: 0; }

/* ===== Skills ===== */
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-list li {
  padding: 0.6rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.skill-list li:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ===== Projects ===== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
  gap: 1.75rem;
}

.project-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.project-card:hover,
.section.visible .project-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}

.project-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.35;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 1.25rem;
  line-height: 1.65;
}

.project-card a,
.project-card .card-cta {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  transition: var(--transition);
}

.project-card a:hover,
.project-card .card-cta:hover { color: var(--accent-bright); }

/* ===== Contact ===== */
.contact-card {
  width: 100%;
  padding: 2.25rem 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.contact-card:hover,
.section.visible .contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}

.contact-info {
  margin-bottom: 0;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.contact-line {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--text-muted);
}
.contact-line:last-child { margin-bottom: 0; }
.contact-label {
  font-weight: 600;
  color: var(--text);
  margin-right: 0.4rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.5rem 2rem;
  padding-top: 1.75rem;
}

.contact-links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.contact-links a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== 스크롤 등장 애니메이션 ===== */
.section .section-title,
.about-wrap,
.edu-card,
.work-list,
.pub-cat-card,
.paper-card,
.awards-timeline,
.award-item,
.content-card,
.patent-card,
.project-grid,
.contact-card {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease-out, transform 0.55s ease-out;
}

.section.visible .section-title,
.section.visible .about-wrap,
.section.visible .edu-card,
.section.visible .work-list,
.section.visible .pub-cat-card,
.section.visible .paper-card,
.section.visible .awards-timeline,
.section.visible .award-item,
.section.visible .content-card,
.section.visible .patent-card,
.section.visible .project-grid,
.section.visible .contact-card {
  opacity: 1;
  transform: translateY(0);
}

.section.visible .work-card:nth-child(1) { transition-delay: 0.05s; }
.section.visible .work-card:nth-child(2) { transition-delay: 0.1s; }
.section.visible .work-card:nth-child(3) { transition-delay: 0.15s; }
.section.visible .project-card { transition-delay: 0.05s; }
.section.visible .project-card:nth-child(2) { transition-delay: 0.1s; }
.section.visible .project-card:nth-child(3) { transition-delay: 0.15s; }
.section.visible .project-card:nth-child(4) { transition-delay: 0.2s; }
.section.visible .project-card:nth-child(5) { transition-delay: 0.25s; }
.section.visible .project-card:nth-child(6) { transition-delay: 0.3s; }
.section.visible .project-card:nth-child(7) { transition-delay: 0.35s; }
.section.visible .project-card:nth-child(8) { transition-delay: 0.4s; }
.section.visible .project-card:nth-child(9) { transition-delay: 0.45s; }
.section.visible .project-card:nth-child(10) { transition-delay: 0.5s; }

/* ===== 반응형 ===== */
@media (max-width: 768px) {
  .page-remote { display: none; }

  .about-wrap {
    flex-direction: column;
    align-items: center;
    gap: 2rem;
  }
  .about-photo-wrap {
    width: 180px;
    height: 180px;
  }
  .about-content {
    max-width: 100%;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 70%;
    height: 100vh;
    background: var(--bg-card);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform var(--transition);
    border-left: 1px solid var(--border);
  }

  .nav-links.open { transform: translateX(0); }

  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .hero { padding: 7rem 1.5rem 3rem; }
  .section { padding: 4rem 1.5rem; }
  .hero-scroll { left: 1.5rem; }
  .edu-card { flex-direction: column; align-items: center; text-align: center; }
  .work-card { flex-direction: column; align-items: center; text-align: center; }
  .work-logo-wrap { width: 80px; height: 80px; }
  .work-meta-list { text-align: left; }
  .awards-timeline { padding-left: 4.5rem; }
  .awards-line { left: 0.75rem; }
  .award-date-wrap { width: 3.5rem; margin-left: -4.5rem; font-size: 0.75rem; }
}