@media only screen and (min-width: 992px) {
  /* About: photo/text vertical centering on desktop */
  #about .row {
    display: flex;
    align-items: center;
  }

  #about .row .col-md-4,
  #about .row .col-md-8 {
    float: none;
  }
}

/* Global tone: stronger blue, darker text, larger type */
:root {
  /* cobalt blue */
  --accent-blue: #0047ab;
  --text-strong: #0f172a;
  --text: #111827;
  --muted: #374151;
  --bg: #ffffff;
  --bg-alt: #f2f2f5;
  --card: #ffffff;
  --border: #e6e6e6;
}

html[data-theme="dark"],
body[data-theme="dark"] {
  /* Dark mode: no pure black; stripes + elevated cards */
  --accent-blue: #8b92a3; /* muted cool gray (was cobalt) */
  --text-strong: #f4f6f9;
  --text: #e8eaef;
  --muted: #b8c0cc;
  --bg: #1e242e; /* default / gray stripe */
  --bg-alt: #141c2e; /* navy stripe (for .background-alt in dark) */
  --card: #2a3140;
  --border: #3d4758;
  /* Alternating section bands */
  --dark-stripe-gray: #1e242e;
  --dark-stripe-navy: #141c2e;
  /* Cards sit slightly above their band */
  --dark-card-on-gray: #2a3140;
  --dark-card-on-navy: #1f2a3d;
  /* Header / legacy alias */
  --dark-surface: var(--dark-stripe-gray);
}

html {
  font-size: 18px;
}

body {
  color: var(--text);
  line-height: 1.65;
  background: var(--bg);
}

.background-alt {
  background: var(--bg-alt) !important;
}

html[data-theme="dark"] a {
  color: var(--text);
}

html[data-theme="dark"] a:hover,
html[data-theme="dark"] a:focus {
  color: #e5e7eb;
}

/* Dark mode: alternating stripes (gray / navy), no flat black */
html[data-theme="dark"] body,
body[data-theme="dark"] {
  background: var(--dark-stripe-gray) !important;
}

html[data-theme="dark"] #about,
body[data-theme="dark"] #about {
  background: var(--dark-stripe-gray) !important;
}

html[data-theme="dark"] #experience,
body[data-theme="dark"] #experience {
  background: var(--dark-stripe-navy) !important;
}

html[data-theme="dark"] #education,
body[data-theme="dark"] #education {
  background: var(--dark-stripe-gray) !important;
}

html[data-theme="dark"] #projects,
body[data-theme="dark"] #projects {
  background: var(--dark-stripe-navy) !important;
}

html[data-theme="dark"] footer,
body[data-theme="dark"] footer {
  background: var(--dark-stripe-navy) !important;
  color: var(--text);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

html[data-theme="dark"] footer a,
body[data-theme="dark"] footer a {
  color: var(--text) !important;
}

/* Fixed header: keep section headings visible when jumping via nav */
#about,
#experience,
#education,
#projects,
#contact {
  scroll-margin-top: 90px;
}

/* Give #about more top space (fixed header) */
#about {
  padding-top: 120px;
}

@media only screen and (max-width: 768px) {
  #about {
    padding-top: 110px;
  }

  /* Mobile: keep top menu bar always visible (no drawer) */
  #mobile-menu-open,
  #mobile-menu-close {
    display: none !important;
  }

  header {
    display: block !important; /* override template: header{display:none} on mobile */
    height: auto !important;   /* override template: height:100% */
    bottom: auto !important;   /* override template: bottom:0 */
    background: transparent;   /* background is on #menu */
  }

  header ul#menu {
    flex-direction: row;
    justify-content: center;
    gap: 4px;
    padding: 10px 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }

  header ul#menu li {
    margin-bottom: 0;
    flex: 0 0 auto;
  }

  header ul#menu a {
    padding: 10px 10px;
    border-radius: 10px;
  }
}

/* Top hero: remove large cobalt overlay */
#lead-overlay {
  background: transparent !important;
}

#lead-down span {
  border-color: rgba(255, 255, 255, 0.65);
}

#lead-content h2 {
  color: rgba(255, 255, 255, 0.85);
}

/* Experience timeline line (left vertical rule) */
#experience-timeline:before,
#experience-timeline:after {
  background: var(--accent-blue) !important;
}

/* Remove the small bottom tail/gradient segment */
#experience-timeline:after {
  display: none !important;
}

/* Experience timeline marker (map-pin circle) */
#experience .vtimeline-icon {
  background: var(--accent-blue) !important;
}

/* Experience timeline: minimalist dots + line with gap (no touching) */
#experience-timeline:before {
  width: 2px !important;
}

@media only screen and (min-width: 751px) {
  #experience .vtimeline-point {
    position: relative;
  }

  /* match line center at ~303px; icon is 14px => left = 303 - 7 = 296 */
  #experience .vtimeline-icon {
    width: 21px !important;
    height: 21px !important;
    /* center the dot on the vertical line (303px) */
    margin-left: 293px !important;
    border-radius: 999px !important;
    border: 2px solid var(--accent-blue) !important;
    background: var(--bg) !important;
    /* vertically center dot within the block */
    position: absolute !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    float: none !important;
    /* creates visible gap so the line never "touches" the dot */
    box-shadow: 0 0 0 7px var(--bg-alt) !important;
  }

  #experience .vtimeline-icon i {
    display: none !important;
  }

  #experience .vtimeline-current .vtimeline-icon {
    background: var(--accent-blue) !important;
  }
}

/* Mobile/collapsed timeline */
@media only screen and (max-width: 750px) {
  #experience .vtimeline-point {
    position: relative;
  }

  #experience .vtimeline-icon {
    width: 21px !important;
    height: 21px !important;
    border-radius: 999px !important;
    border: 2px solid var(--accent-blue) !important;
    background: var(--bg) !important;
    position: absolute !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    float: none !important;
    /* collapsed line is at 23px; center dot on it */
    left: 13px !important;
    box-shadow: 0 0 0 7px var(--bg-alt) !important;
  }

  #experience .vtimeline-icon i {
    display: none !important;
  }

  #experience .vtimeline-current .vtimeline-icon {
    background: var(--accent-blue) !important;
  }
}

/* Dark: timeline halo matches navy stripe (line stays visible across cards) */
html[data-theme="dark"] #experience .vtimeline-icon,
body[data-theme="dark"] #experience .vtimeline-icon {
  box-shadow: 0 0 0 7px var(--dark-stripe-navy) !important;
}

/* Contact section: enforce cobalt background + readable fields */
#contact {
  background: var(--accent-blue) !important;
}

html[data-theme="dark"] #contact,
body[data-theme="dark"] #contact {
  background: var(--dark-stripe-gray) !important;
}

#contact-form input,
#contact-form textarea {
  background: rgba(0, 0, 0, 0.22) !important;
}

#contact-form input:focus,
#contact-form textarea:focus {
  background: rgba(0, 0, 0, 0.30) !important;
}

#contact-form button {
  color: var(--accent-blue) !important;
}

a {
  color: var(--accent-blue);
}

a:hover,
a:focus {
  color: #003a8c;
}

/* Full-width cobalt menu bar with white text */
body.active {
  overflow: hidden;
  /* template sets z-index: -1, which breaks mobile overlay stacking */
  z-index: auto;
}

/* If we don't use the mobile drawer, never lock body scroll */
@media only screen and (max-width: 768px) {
  body.active {
    overflow: auto;
  }
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

header ul#menu {
  position: relative;
  z-index: 1001;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background: var(--accent-blue);
  border-radius: 0;
  padding: 10px 24px;
}

html[data-theme="dark"] header ul#menu,
body[data-theme="dark"] header ul#menu {
  background: var(--dark-stripe-gray) !important;
}

header ul#menu li {
  display: block;
}

header ul#menu a {
  color: #fff !important;
  padding: 10px 12px;
}

header ul#menu .theme-toggle {
  position: relative;
  z-index: 1002;
  pointer-events: auto;
  appearance: none;
  border: 0;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  padding: 8px 10px;
  border-radius: 999px;
  line-height: 1;
  cursor: pointer;
  font: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.18s ease, transform 0.18s ease;
}

header ul#menu li.menu-theme {
  position: relative;
  z-index: 1002;
  pointer-events: auto;
}

header ul#menu .theme-toggle i {
  font-size: 16px;
  line-height: 1;
}

header ul#menu .theme-toggle:hover,
header ul#menu .theme-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}

header ul#menu a:hover,
header ul#menu a:focus {
  color: #fff !important;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 8px;
}

/* Mobile menu icons/text */
#mobile-menu-open,
#mobile-menu-close {
  color: #fff !important;
}

.top span {
  border-color: rgba(0, 71, 171, 0.45);
}

.top i {
  color: var(--accent-blue);
}

/* Headings darker + slightly larger */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong);
}

.heading {
  font-size: 2.6em;
  font-weight: 350;
  color: var(--text-strong);
}

.heading {
  margin-bottom: 12px;
}

.heading:after {
  background: var(--accent-blue);
}

/* About heading + photo spacing */
#about .col-md-4 > .heading {
  margin-bottom: 6px;
  position: relative;
  top: -10px;
}

/* Common muted text -> darker */
p,
li,
.copyright p,
.vtimeline-content p,
.vtimeline-content ul,
.vtimeline-content li,
.education-block p,
.education-block ul,
.project-info p,
.pub-card__venue,
.pub-card__authors,
.pub-card__abstract,
#about p,
footer .social a {
  color: var(--text);
}

/* Life gallery (replaces former #skills section; id is #life) */
#life {
  padding: 50px 15px;
  text-align: center;
  border-bottom: 1px solid #dcd9d9;
}

#life h2.heading {
  color: var(--text-strong);
  margin-bottom: 16px;
}

#life .life-intro {
  max-width: 640px;
  margin: 0 auto 36px;
  padding: 0 15px;
  font-size: 1.1em;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.5;
}

/* About Me main paragraph (index.html:76-78) */
#about .col-md-8 > p {
  font-size: 1.3em;
  line-height: 1.7;
}

/* About icons (email/github/linkedin/scholar) bigger */
#about .social li {
  font-size: 2.5em;
}

/* 그리드 전체 가로폭 — 숫자를 키우면 한 칸(이미지)도 같이 넓어짐 (3열이면 대략 ÷3) */
#life .life-grid {
  max-width: 960px;
  margin: 0 auto;
  text-align: left;
}

#life .life-grid__cell {
  margin-bottom: 22px;
}

#life figure.life-photo {
  margin: 0;
  padding: 0;
  max-width: 100%;
}

/* 클릭 가능: 커서 + 호버 시 돋보기 오버레이 */
#life .life-photo__link {
  display: block;
  position: relative;
  max-width: 100%;
  overflow: hidden;
  border-radius: 4px;
  border: 1px solid #e6e6e6;
  cursor: zoom-in;
  background: #f5f5f5;
}

#life .life-photo__link:focus {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* 너비만 그리드 칸에 맞추고, 세로는 원본 비율 유지 */
#life .life-photo__link > img {
  width: 100%;
  height: auto;
  display: block;
}

#life .life-photo__overlay {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 2rem;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

#life .life-photo__link:hover .life-photo__overlay,
#life .life-photo__link:focus .life-photo__overlay {
  opacity: 1;
}

#life .life-photo figcaption {
  margin-top: 8px;
  font-size: 0.9em;
  color: #74808a;
  line-height: 1.4;
  text-align: center;
}

@media only screen and (max-width: 480px) {
  #life .life-photo figcaption {
    font-size: 0.82em;
  }
}

/* 라이트박스 (Life 사진 클릭 시) */
.life-lightbox {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 10050;
  padding: 20px;
  box-sizing: border-box;
  align-items: center;
  justify-content: center;
}

.life-lightbox.is-open {
  display: flex;
}

.life-lightbox__backdrop {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.88);
  border: 0;
  cursor: pointer;
}

.life-lightbox__panel {
  position: relative;
  z-index: 1;
  max-width: min(96vw, 1100px);
  max-height: 90vh;
  overflow: auto;
  text-align: center;
}

.life-lightbox__img {
  max-width: 100%;
  max-height: 85vh;
  width: auto;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 4px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.life-lightbox__close {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 2;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 1.25rem;
  line-height: 40px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.life-lightbox__close:hover,
.life-lightbox__close:focus {
  background: rgba(0, 0, 0, 0.75);
  outline: none;
}

.life-lightbox__caption {
  margin: 12px 0 0;
  padding: 0 48px 0 8px;
  font-size: 0.95em;
  color: #e8e8e8;
  line-height: 1.4;
}

.life-lightbox__caption:empty {
  display: none;
}

/* Publication cards: thumb left, text right */
#projects .pub-list {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 15px 20px;
  text-align: left;
}

#projects .pub-card {
  position: relative;
  display: block;
  margin-bottom: 28px;
  padding: 22px 22px 22px 26px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  overflow: hidden;
}

#projects .pub-card:last-child {
  margin-bottom: 0;
}

#projects .pub-card:before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent-blue);
  opacity: 0.9;
}

#projects .pub-card__body {
  min-width: 0;
}

#projects .pub-card__title {
  margin: 0 0 10px 0;
  font-size: 1.15em;
  font-weight: 400;
  color: var(--text-strong);
  line-height: 1.3;
}

#projects .pub-card__venue {
  margin: 0 0 8px 0;
  font-size: 0.95em;
  color: var(--text);
}

#projects .pub-card__venue strong {
  color: var(--text);
  font-weight: 400;
}

#projects .pub-card__links {
  margin-left: 6px;
  font-weight: 400;
}

#projects .pub-card__links a {
  color: var(--accent-blue);
  text-decoration: none;
}

#projects .pub-card__links a:hover {
  text-decoration: underline;
}

#projects .pub-card__sep {
  margin: 0 6px;
  color: var(--text);
  opacity: 0.5;
}

#projects .pub-card__authors {
  margin: 0 0 12px 0;
  font-size: 0.9em;
  color: var(--text);
  line-height: 1.45;
}

/* Make author emphasis bolder */
#projects .pub-card__authors b {
  font-weight: 900;
}

#projects .pub-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

#projects .pub-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 0.9em;
  line-height: 1;
  border: 1px solid var(--text);
  background: transparent;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

#projects .pub-btn--primary {
  /* keep same base style; hover will highlight */
  background: var(--card);
}

#projects .pub-btn--ghost {
  background: var(--card);
}

#projects .pub-btn:hover,
#projects .pub-btn:focus-visible {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
  transform: translateY(-1px);
}

#projects .pub-abs {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.6);
  color: var(--text);
  /* Conference-style body (CVPR / LaTeX-adjacent): STIX for proceedings-like serif */
  font-family: 'STIX Two Text', 'Times New Roman', Times, 'Liberation Serif', serif;
  font-size: 0.93em;
  line-height: 1.62;
  font-weight: 400;
}

html[data-theme="dark"] #projects .pub-abs,
body[data-theme="dark"] #projects .pub-abs {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
}

html[data-theme="dark"] #contact-form input,
html[data-theme="dark"] #contact-form textarea {
  color: #fff;
}

html[data-theme="dark"] #contact-form input::placeholder,
html[data-theme="dark"] #contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.75);
}

html[data-theme="dark"] #contact-form button {
  color: #fff !important;
  border-color: rgba(255, 255, 255, 0.75) !important;
  background: rgba(0, 0, 0, 0.35) !important;
}

/* Dark mode: Experience section text + cards */
html[data-theme="dark"] #experience,
body[data-theme="dark"] #experience {
  color: var(--text);
}

html[data-theme="dark"] #experience h2.heading,
body[data-theme="dark"] #experience h2.heading {
  color: var(--text-strong) !important;
}

html[data-theme="dark"] #experience .vtimeline-content h3,
html[data-theme="dark"] #experience .vtimeline-content h4,
html[data-theme="dark"] #experience .vtimeline-content p,
body[data-theme="dark"] #experience .vtimeline-content h3,
body[data-theme="dark"] #experience .vtimeline-content h4,
body[data-theme="dark"] #experience .vtimeline-content p {
  color: var(--text) !important;
}

html[data-theme="dark"] #experience .vtimeline-date,
body[data-theme="dark"] #experience .vtimeline-date {
  color: var(--muted) !important;
}

/* Dark mode: section headings should be white everywhere */
html[data-theme="dark"] .heading,
body[data-theme="dark"] .heading,
html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3,
html[data-theme="dark"] h4,
html[data-theme="dark"] h5,
html[data-theme="dark"] h6,
body[data-theme="dark"] h1,
body[data-theme="dark"] h2,
body[data-theme="dark"] h3,
body[data-theme="dark"] h4,
body[data-theme="dark"] h5,
body[data-theme="dark"] h6 {
  color: var(--text-strong) !important;
}

/* Dark mode: cards elevated above stripe */
html[data-theme="dark"] #experience .vtimeline-content,
body[data-theme="dark"] #experience .vtimeline-content {
  background: var(--dark-card-on-navy) !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
}

/* Experience timeline: keep the wrapper transparent so it doesn't cover the vertical line */
html[data-theme="dark"] #experience .vtimeline-block,
body[data-theme="dark"] #experience .vtimeline-block {
  background: transparent !important;
  border: 0 !important;
}

html[data-theme="dark"] #education .education-block,
body[data-theme="dark"] #education .education-block {
  background: var(--dark-card-on-gray) !important;
  border-color: var(--border) !important;
  color: var(--text) !important;
}

html[data-theme="dark"] #projects .pub-card,
body[data-theme="dark"] #projects .pub-card {
  background: var(--dark-card-on-navy) !important;
  border-color: var(--border) !important;
}

#projects .pub-abs p {
  margin: 0;
  color: var(--text);
  font-size: inherit;
  line-height: inherit;
}

/* Experience: tighten spacing between h3/h4/p in each timeline block */
#experience .vtimeline-content h3 {
  margin: 0 0 2px 0;
  line-height: 1.2;
}

#experience .vtimeline-content h4 {
  margin: 0 0 6px 0;
  line-height: 1.25;
}

#experience .vtimeline-content p {
  margin: 0;
  color: var(--muted);
}


@media only screen and (max-width: 768px) {
  #projects .pub-card {
    padding-left: 22px;
  }
}