:root{
  --text-strong: #0f172a; 
  --text-primary: #1f2937;   /* slate-800 */
  --text-muted:  #6b7280;   /* slate-500 */
}

.dark-mode{
  --text-strong: rgba(255,255,255,0.94);
  --text-primary: #1f2937;   /* slate-800 */
  --text-muted:  #6b7280;   /* slate-500 */
}
/*font-family: 'Noto Sans KR', sans-serif;*/
 /* font-family: Arial; */
 body {
  /* font-family: 'Noto Sans KR', sans-serif; */
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
  font-weight: 500;
  word-wrap: break-word;
  word-break: keep-all;
  line-height: 1.8
}
/* .paper-img{
  display: block;
  background: url('http://www.google.com/intl/en_com/images/srpr/logo3w.png');
  max-width: 320px;
  max-height: 180px;
  margin: auto;
}
.paper-img-small{
  display: block;
  background: url('http://www.google.com/intl/en_com/images/srpr/logo3w.png');
  max-width: 280px;
  max-height: 160px;  
  margin: auto;
} */
ul {
  list-style-type: circle;
  margin: 0;
  line-height: 0;
  margin-bottom: -20px;  
  margin-top: -20px;  
}
/* 
li {
  line-height: 0;
  margin: 0;
  margin-bottom: 0;
  margin-top: 0;  
  padding: 0;
} */

body {
  margin: 0;
  background-color: #FFFFFF;
  color: #000000; 
}
/* Light mode styles */
body.light-mode {
  margin: 0;
  background-color: #FFF;
  color: #000000;
}

section {
  scroll-margin-top: 20px; /* This adds 20px of padding space on top when navigating to the section */
}


/* Additional style changes for specific elements in night mode */
body blu {
  /* color: #3a91e3; */
  color: #140083;
}
body bblu {
  /* color: #002dc1; */
  color: #3a91e3;
}
body am {
  color: #596384; /* Gold color for headings */
}
body rd {
  color: #fa8072; /* Gold color for headings */  
}
body drk {
  color: #000000; /* Gold color for headings */  
}
body hr {
  background-color: #222222; 
}
/* Dark theme styles */
body.dark-mode {
  /* background-color: #333; */
  background-color: #273045;
  /* background-color: #333333; */
  color: #E6EDF3;
}
/* Additional style changes for specific elements in night mode */
body.dark-mode gre {
  color: #eeeeee86; /* Gold color for headings */
}
body.dark-mode drk {
  color: #eeeeee; /* Gold color for headings */
}
body.dark-mode rd {
  color: #ffa59b; /* Gold color for headings */
}
body.dark-mode blu {
  color: #cac8ff; /* Gold color for headings */
}
body.dark-mode bblu {
  color: #44a5c0; /* Gold color for headings */
}
body.dark-mode am {
  color: #cac8ff; /* Gold color for headings */
}
body.dark-mode hr {
  background-color: #777777; 
}

html {
  scroll-behavior: smooth;
}

/*
 Profile
*/

.profile-name{
  margin: 0;
  font-size: 2.2rem;       
  font-weight: 650;        
  line-height: 1.2;
  letter-spacing: 0;
  color: var(--text-strong);
}

.profile-meta{
  display: grid;
  gap: 8px;
}

.profile-role{
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.35rem;
}

.profile-loc{
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-top: 2px;
}

.profile-email{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
  color: rgba(17,17,17,0.68);
}

.profile-email-icon{
  opacity: 0.75;
  transform: translateY(1px);
}

.profile-email-link{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 1.06rem;
  text-decoration: none;
  color: rgba(47,58,140,0.82);
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

.profile-email-link:hover{
  color: #2f3a8c;
  text-decoration: underline;
}

.profile-social{
  margin-top: 14px;
}

.socialBar{
  display: inline-flex;
  align-items: center;
  gap: 18px;
}

.profile-divider{
  height: 1px;
  margin-top: 10px;
  width: 100%;
  background: rgba(17,17,17,0.12);
}

.dark-mode .profile-name{
  color: rgba(255,255,255,0.94);
}

.dark-mode .profile-role{
  color: rgba(255,255,255,0.92);
}

.dark-mode .profile-loc,
.dark-mode .profile-email{
  color: rgba(255,255,255,0.70);
}

.dark-mode .profile-email-link{
  color: rgba(154,167,255,0.82);
}

.dark-mode .profile-email-link:hover{
  color: #c4b5fd;
}

.dark-mode .profile-divider{
  background: rgba(255,255,255,0.14);
}



.profile-main {
  position: relative;
}

.ntu-logo-link {
  position: absolute;
  top: 0.3rem;
  right: 0;
  display: block;
  z-index: 2;
}

.ntu-logo {
  height: 55px;
  width: auto;
  object-fit: contain;
  opacity: 0.95;
}

.profile-name {
  padding-right: 170px;
}

/* 모바일에서는 오른쪽 위 배치 말고 가운데로 */
@media (max-width: 767.98px) {
  .ntu-logo-link {
    position: static;
    display: flex;
    justify-content: center;
    margin-bottom: 0.8rem;
  }

  .ntu-logo {
    height: 45px;
  }

  .profile-name {
    padding-right: 0;
  }
}


.intro-text{
  font-size: 1rem;
  line-height: 1.7;
  font-weight: 480;
  color: rgba(17,17,17,0.82);
  margin: 20px 0 20px 0;
  /* color: rgba(0,0,0,0.68); */
}

.dark-mode .intro-text{
  color: rgba(255,255,255,0.82);
  /* color: rgba(255,255,255,0.72); */
}

.intro-text a{
  color: color-mix(in srgb, var(--nav-accent) 75%, #000 25%);
  text-decoration: none;
  font-weight: 500;
}

.intro-text a:hover{
  text-decoration: underline;
}

.intro-row{
  display: flex;
  align-items: center;
}

.intro-callout{
  display: flex;
  align-items: left;
  gap: 10px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(0,0,0,0.03);
  border: 1px solid rgba(0,0,0,0.06);
  line-height: 1.35;
}

.intro-callout {
  /* display: flex; */
  flex-direction: column;
  /* gap: 0.35rem; */
}

.dark-mode .intro-callout{
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
}

/* .intro-callout .pin{
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(47,58,140,0.10);
} */

/* .dark-mode .intro-callout .pin{
  background: rgba(154,167,255,0.18);
} */

.intro-callout-text{
  font-weight: 480;
  color: rgba(0,0,0,0.82);
}

.dark-mode .intro-callout-text{
  color: rgba(255,255,255,0.84);
}

.intro-callout-text strong{
  font-weight: 600;
}

.intro-link{
  color: rgba(47,58,140,0.82);   
  font-weight: inherit;
  text-decoration: none;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

.intro-link:hover{
  color: #2f3a8c;
  text-decoration: underline;
}

.dark-mode .intro-link{
  color: rgba(154,167,255,0.82);
}

.dark-mode .intro-link:hover{
  color: #c4b5fd;
}


/* .intro-lead{
  margin-top: 1.2rem;
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(17,17,17,0.78);
} */
.intro-lead{
  margin: 0 0 10px;
  font-size: 1.02rem;
  line-height: 1.7;
  font-weight: 480;
  color: rgba(0,0,0,0.68);
}

.dark-mode .intro-lead{
  color: rgba(255,255,255,0.72);
}

.intro-link{
  color: rgba(47,58,140,0.85); /* indigo-gray */
  font-weight: 560;
  text-decoration: none;
  transition: color 0.15s ease;
}

.intro-link:hover{
  color: #2f3a8c;
  text-decoration: underline;
}

.dark-mode .intro-link{
  color: rgba(154,167,255,0.85);
}

.dark-mode .intro-link:hover{
  color: #c4b5fd;
}

/* .intro-lead em{
  font-style: normal;
  font-weight: 500;
  color: var(--nav-accent);
} */

.intro-em{
  font-weight: 600;
  color: color-mix(in srgb, currentColor 88%, #6d5efc 12%);
}

.dark-mode .intro-em{
  color: rgba(255,255,255,0.82);
}

.topic-text{
  color: inherit;
}

.intro-hr{
  margin-top: 18px;
  border: 0;
  height: 1px;
  background: rgba(0,0,0,0.08);
}

.dark-mode .intro-hr{
  background: rgba(255,255,255,0.12);
}

#introduction p{
  margin-bottom: 0.9rem;
}

#introduction{
  margin-top: 0.4rem;
}

/* .conf-color {
  color: #2980f1;
}
.blue {
  color: #3c78d8;
}
.gray {
  color: gray;
}
.midgray {
  color: rgb(75, 75, 75);
}
.darkgray {
  font-family: Arial;
}
.secfont {
  font-size: x-large; 
  font-weight: 700;
} */
.secfont {
  font-size: x-large; 
  font-weight: 700;
  margin-left: 20px;
}
.profile-img {
  max-height: 320px;
  object-fit: cover;
  object-position: center top;
}
.wo-linebreak {
  white-space: nowrap;
}
.head-inline {
  display: inline;
}
.right {
  width: 100%;
  background-color:#ffffff;
}
.footer-cover {
  /* background-color: #f5f5f5; */
  padding-left: 0;
  padding-right: 0;
  margin-top: 0px;
  height: 80px;
}
.note {
  font-size: 0.9em;
  /* color: rgb(58, 58, 58); */
  font-weight: 500;
  font-family: Arial;
  line-height:1.5;
}
.note-one {
  font-size: 1em;
  /* color: rgb(58, 58, 58); */
  font-weight: 500;
  font-family: Arial;
  line-height:1.5;
}
.note-thin-large {
  font-size: 1.2em;
  /* color: rgb(58, 58, 58); */
  font-family: Arial;
  line-height:1.5;
}
.notesize{
  background-color: transparent;
  font-size: 1.6em;
  font-weight: 500;
  border-radius: 5px;
  padding: 0.0em;
  line-height:1.5;
  text-align: left;
}
.bluenote {
  color: #2980f1;
  font-weight: 500;
  font-family: Arial;
  line-height:1.5;
}

.research-topics{
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 1rem;
  display: grid;
  gap: 0.45rem;
  line-height: 1.5;
}

.research-topics .topic{
  margin: 0;
  border-radius: 10px;
  padding: 0.5rem 0.75rem;
  border: 1px solid rgba(17,17,17,0.08);
  background: rgba(17,17,17,0.02);
  font-size: 1rem;
  font-weight: 520;
  color: rgba(17,17,17,0.82);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

body.dark-mode .research-topics .topic{
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.88);
}

.footer {
  padding-top: 10px;
}
.no-tb-padding{
  padding-top: -10px;
  padding-bottom: -10px;
}
.no-lr-padding {
  padding-left: 0;
  padding-right: 0;
}
.thumbnail {
  width: 100%;
  height: 100px;
  margin: 0;
}
.bbold{
  font-weight: 500;
}
.bbbold{
  font-weight: 700;
}
.ssmall{
  margin-left: 20px;
  font-size: 1.0em;
}
.popup {
  font-size: .8em;
  display: inline-block;
  border: 2px dotted #000;
  border-radius: 15px;
  border-color:rgba(0, 0, 0, 0.3);
  background-color:transparent;
  display:none;
  width: 100%;
  line-height:1.5;
  padding: 1em;
  margin: .5em;
  font-family: 'Courier New', Courier, monospace;
}
.popup-old-news {
  display: inline-block;
  display:none;
  background-color:transparent;
}
.popup-news {
  font-size: 0.9em;
  display: inline-block;
  border-radius: 10px;
  background-color: #e8edff;  
  width: 80%;
  font-weight: 400;
  line-height:1.5;
  display:none;
  padding: 1em;
  margin: .5em;
  margin-top: .2em;
  padding-top: .3em;
  padding-bottom: .3em;
  margin-left: 6em;
}

.badge {
  display: inline-block;
  font-size: 1em;
  font-weight: 300;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: 15px;
  padding: 1em;
  padding-bottom: .4em;  
}

.badge:empty {
  display: none;
}
.badge-gray {
  color: #0b1a2a;
  background-color: #e6f2ff;  
  border: 1px solid #9ec9ff;  
  height: 1.6em;
  border-radius: 0.4em;
}
.dark-mode .badge-gray {
    color: #eaf4ff;
    background-color: #1f2a44;
    border: 1px solid #5fa8ff;
}

.badge-white {
  color: #1b3a5f;
  background-color: #f2f8ff;
  border: 1px solid #c7ddff;
  height: 1.6em;
  padding: 0 0.55em;
  border-radius: 0.45em;
  line-height: 1.6em;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.badge-white:hover,
.badge-white:focus {
  color: #16365c;
  background-color: #dbeeff;
  border-color: #9ec9ff;
  text-decoration: none;
}

.dark-mode .badge-white {
  color: #e3f0ff;
  background-color: #1e2a3f;
  border: 1px solid #4f86c6;
}

.dark-mode .badge-white:hover,
.dark-mode .badge-white:focus {
  color: #ffffff;
  background-color: #2a3a55;
  border-color: #6fa8ff;
}

.badge-bibtexwhite {
  color: #000000;
  background-color: #ebedff;
  /* background-color: transparent; */
  border-color: #000000;
  height:1.6em;
}
.badge-bibtexwhite[href]:hover, .badge-bibtexwhite[href]:focus {
  color: #000000;
  text-decoration: none;
  background-color: #aadbff;
}


.switch-container {
  display: flex;
  align-items: center; /* Aligns items vertically centered */
  gap: 10px; /* Adds space between the text and the switch */
}

.theme-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.theme-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "🌙";
  /* content: "Dark Mode"; */
  height: 26px;
  width: 26px;
  left: 4px;
  top: 4px;
  bottom: 4px;
  text-align: center;
  font-size: 20px; 
  background-color: rgb(0, 0, 0);
  transition: .4s;
  border-radius: 20%;
}

input:checked + .slider {
  background-color: #cac8ff;
}

input:checked + .slider:before {
  transform: translateX(26px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

/* body.dark-mode {
  background-color: #333;
  color: #f4f4f4;
} */

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  background-color: transparent; /* Makes the button background transparent */
  border: none; /* Removes the border */
  color: inherit; /* Ensures the text color inherits from the body */
}


/* SOCIAL ICONS */
  .socialBar {
    display: flex;
    gap: 14px;
    align-items: center;
  }
  

  .socialIcon {
    width: 40px;
    height: 40px;
    border-radius: 999px;
  
    display: inline-flex;
    align-items: center;
    justify-content: center;
  
    font-size: 24px;
    text-decoration: none;
  
    color: var(--icon-fg);
    border: 1px solid var(--icon-border);
    background: var(--icon-bg);
  
    transition: 
      color 0.15s ease,
      background 0.15s ease,
      border-color 0.15s ease,
      transform 0.12s ease;
  }
  

  .socialIcon svg {
    width: 24px;         
    height: 24px;
    display: block;      
    fill: currentColor;
  }

  .socialIcon:hover {
    background: var(--icon-bg-hover);
    transform: translateY(-2px);
  }
  
.socialIcon.scholar:hover {
  color: #5a6fe3;
}

.dark-mode .socialIcon.scholar:hover {
  color: #c4b5fd;
}


  /* =========================
     Page content offset
     ========================= */
  body{
    padding-top: 84px;
  }
  
  @media (max-width: 820px){
    body{
      padding-top: 78px;
    }
  }