/* ============================================================
   STYLE.CSS
   Shared by every page (index.html, research.html, cv.html,
   travel.html). Edit colors/fonts here and the whole site
   updates at once — no need to touch the individual pages.
   ============================================================ */

:root{
  --bg:      #FFFFFF;   /* page background */
  --ink:     #181C24;   /* body text — cool near-black */
  --ink-soft:#565F6D;   /* secondary text (subtitle, meta) — cool slate gray */
  --link:    #1B345C;   /* link color — deep, saturated navy */
  --link-hover: #0F2038;
  --rule:    #E2E5EB;   /* hairline borders — cool neutral */

  --accent:      #1E3A66; /* primary accent, deep navy */
  --accent-dark: #0F2038;
  --accent-soft: #F6F7F5; /* pale slate-blue tint for subtle fills/hovers */
  --offwhite:    #F9FBFB; /* barely-there warm-neutral for reading panels */

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --max-width: 920px;
}

*{ box-sizing:border-box; }

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.6;
}

a{ color:var(--link); text-decoration:underline; text-underline-offset:2px; }
a:hover{ color:var(--link-hover); }

.wrap{
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 24px;
}

/* --- Header / nav --- */
header.site{
  border-bottom:2px solid var(--accent);
  padding:22px 0 16px;
  margin-bottom:34px;
}
.site-name{
  display:none;
}

nav.site-nav{
  margin-top:0;
}
nav.site-nav a{
  color:var(--ink-soft);
  text-decoration:none;
  margin-right:18px;
  font-size:15px;
}
nav.site-nav a:hover{ color:var(--accent); text-decoration:underline; }
nav.site-nav a.active{
  color:var(--accent);
  font-weight:600;
  text-decoration:none;
  border-bottom:2px solid var(--accent);
  padding-bottom:4px;
}

/* --- Page content --- */
main{ padding-bottom:30px; }

h1{
  font-size:28px;
  font-weight:600;
  margin:0 0 14px;
  position:relative;
  padding-bottom:12px;
}
h1::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:46px;
  height:3px;
  background:var(--accent);
  border-radius:2px;
}
.intro-header h1::after{
  left:50%;
  transform:translateX(-50%);
}
h2{
  font-size:19px;
  font-weight:600;
  margin:38px 0 14px;
  padding-bottom:6px;
  border-bottom:2px solid var(--accent);
  color:var(--accent-dark);
}
h3{
  font-size:15px;
  font-weight:600;
  margin:24px 0 10px;
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:0.03em;
}

.subtitle{
  font-size:17px;
  color:var(--ink-soft);
  margin:0 0 22px;
}
.subtitle-strong{
  font-weight:475;
  color:var(--ink);
}

p{ margin:0 0 16px; }

/* --- About / home page --- */
ul.interest-list{
  list-style:disc;
  margin:0 0 20px;
  padding-left:18px;
}
ul.interest-list li::marker{
  font-size:0.7em;
}
ul.interest-list li{ margin-bottom:10px; }

.contact-line{
  margin-top:28px;
  margin-bottom:16px;
  padding-top:18px;
  border-top:1px solid var(--rule);
  font-size:16px;
  color:var(--ink-soft);
  text-align:center;
}
.contact-line-row{
  display:flex;
  align-items:center;
  justify-content:center;
  flex-wrap:wrap;
  gap:4px 6px;
}
.contact-line-row:not(.contact-links-row){
  gap:4px 5px;
}
.contact-links-row{
  margin-top:6px;
}
.contact-line a{ font-size:16px; }
.linkedin-link,
.scholar-link{
  display:inline-flex;
  align-items:center;
  gap:5px;
}
.linkedin-icon,
.scholar-icon{
  width:16.5px;
  height:16.5px;
  vertical-align:middle;
}

/* --- Research page: citation list --- */
ul.pub-list{
  list-style:none;
  margin:0 0 10px;
  padding:0;
}
ul.pub-list:last-of-type{
  margin-bottom:30px;
}
ul.pub-list li{
  margin-bottom:18px;
  font-size:16px;
}
ul.pub-list li .pub-links{
  font-size:14px;
  font-weight:400;
}

/* --- CV page --- */
.cv-actions{ margin-bottom:20px; }
.cv-actions a{
  display:inline-block;
  padding:8px 16px;
  background:var(--accent);
  color:#fff;
  text-decoration:none;
  border-radius:4px;
  font-size:15px;
  font-weight:600;
  transition:background .15s;
}
.cv-actions a:hover{ background:var(--accent-dark); color:#fff; }
.cv-embed{
  width:100%;
  height:80vh;
  border:1px solid var(--rule);
  border-top:3px solid var(--accent);
  border-radius:3px;
}
.cv-fallback{
  border:1px dashed var(--rule);
  border-radius:3px;
  padding:20px;
  color:var(--ink-soft);
  font-size:15px;
}

/* --- Travel page: slideshow --- */
.slideshow{
  margin:6px 0 24px;
}
.slideshow-viewport{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  border-radius:3px;
  border:1.1px solid #111111;
  overflow:hidden;
  background:#F4F4F4;
}
.slide-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.slide-caption{
  position:absolute;
  left:0; right:0; bottom:0;
  padding:10px 14px;
  font-size:16px;
  color:#fff;
  text-align:center;
  background:linear-gradient(to top, rgba(0,0,0,0.55), rgba(0,0,0,0));
  display:none;
}
.slide-arrow{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  width:34px;
  height:34px;
  border-radius:50%;
  border:none;
  background:rgba(255,255,255,0.85);
  color:var(--ink);
  font-size:20px;
  line-height:1;
  cursor:pointer;
  display:none;
  align-items:center;
  justify-content:center;
}
.slideshow.multi .slide-arrow{ display:flex; }
.slide-arrow.prev{ left:10px; }
.slide-arrow.next{ right:10px; }
.slide-dots{
  display:none;
  justify-content:center;
  gap:8px;
  margin-top:10px;
}
.slideshow.multi .slide-dots{ display:flex; }
.slide-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  border:none;
  padding:0;
  background:var(--rule);
  cursor:pointer;
}
.slide-dot.active{ background:var(--accent); }
.slide-arrow:hover{ background:#fff; color:var(--accent); }
ul.travel-grid{
  columns:2;
  column-gap:26px;
  list-style:none;
  margin:0;
  padding:0;
  font-size:15.5px;
}
ul.travel-grid li{
  padding:6px 0;
  border-bottom:1px dotted var(--rule);
  break-inside:avoid;
  color:var(--ink-soft);
}

/* --- Footer --- */
footer{
  border-top:1px solid var(--rule);
  padding:20px 0 50px;
  font-size:13.5px;
  color:var(--ink-soft);
}

/* --- Responsive --- */
@media (max-width:560px){
  body{ font-size:16px; }
  nav.site-nav a{ margin-right:12px; font-size:14px; }
  ul.travel-grid{ columns:1; }
}


/* --- About page: full-width color band behind the bio section --- */
.about-band{
  width:100%;
  background:var(--accent-soft);
  padding:32px 0 36px;
  margin-bottom:36px;
}
.intro-header{
  text-align:center;
  margin-bottom:36px;
}
.profile-row{
  display:flex;
  align-items:flex-start;
  gap:30px;
  margin-bottom:8px;
}
.profile-photo-frame{
  flex-shrink:0;
}
.profile-photo{
  display:block;
  width: 288px;
  height: 363px;
  object-fit:cover;
  border-radius:6px;
  margin:0;
  border:1px solid var(--rule);
  box-shadow:0 2px 14px rgba(15,32,56,0.15);
}
.profile-text{ flex:1; min-width:0; max-width:560px; font-size:11.9pt; }
.profile-text p:last-child,
.profile-text ul:last-child{ margin-bottom:0; }

.bio-centered{
  width:820px;
  max-width:100%;
  margin:24px 0 0;
  text-align:center;
  font-size:11.9pt;
}

@media (max-width:560px){
  .profile-row{
    flex-direction:column;
    align-items:center;
    text-align:center;
  }
}

/* Research cards */
.paper-card{margin:0 0 18px;}
.paper-card summary{list-style:none;cursor:pointer}
.paper-card summary::-webkit-details-marker{display:none}
.paper-header{
display:flex;justify-content:space-between;align-items:flex-start;
padding:14px 18px;background:var(--bg);border:1px solid var(--rule);
border-left:3px solid var(--accent);
border-radius:6px;transition:.15s;
}
.paper-header:hover{background:var(--accent-soft);border-color:var(--rule);border-left-color:var(--accent)}
.paper-title{flex:1;padding-right:20px;line-height:1.6}
.paper-icon::before{content:'+';font-size:22px;color:var(--accent);font-weight:300}
.paper-card[open] .paper-header{border-left-color:var(--accent)}
.paper-card[open] .paper-icon::before{content:'−';color:var(--accent)}
.paper-abstract{
margin-top:8px;padding:16px 20px;background:var(--offwhite);
border-left:4px solid var(--accent);border-radius:0 4px 4px 0;
color:#3F3E3B;line-height:1.7
}

/* --- CV page: keep the original teal scheme, untouched by the rest of the site's navy --- */
body.cv-page{
  --link:        #1F6F72;
  --link-hover:  #134548;
  --accent:      #1F6F72;
  --accent-dark: #134548;
  --accent-soft: #E6F2F1;
}

/* --- Teaching page --- */
ul.teaching-list{
  list-style:none;
  margin:0 0 30px;
  padding:0;
}
.teaching-card{ margin:0 0 14px; }
.teaching-card summary{
  list-style:none;
  cursor:pointer;
}
.teaching-card summary::-webkit-details-marker{ display:none; }
.teaching-header{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  padding:14px 18px;
  background:var(--bg);
  border:1px solid var(--rule);
  border-left:3px solid var(--accent);
  border-radius:6px;
  transition:.15s;
}
.teaching-header:hover{ background:var(--accent-soft); border-color:var(--rule); border-left-color:var(--accent); }
.teaching-card[open] .teaching-header{ border-left-color:var(--accent); }
.teaching-summary-text{ flex:1; padding-right:20px; }
.teaching-icon::before{
  content:'+';
  font-size:22px;
  color:var(--accent);
  font-weight:300;
}
.teaching-card[open] .teaching-icon::before{ content:'\2212'; color:var(--accent); }
.teaching-desc{
  margin-top:8px;
  padding:16px 20px;
  background:var(--offwhite);
  border-left:4px solid var(--accent);
  border-radius:0 4px 4px 0;
  color:#3F3E3B;
  line-height:1.7;
  font-size:14.5px;
}
.teaching-top{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  flex-wrap:wrap;
  gap:4px 16px;
}
.teaching-course{
  font-weight:600;
  font-size:16px;
  line-height:1.5;
}
.teaching-instructor{
  font-weight:400;
  color:var(--ink-soft);
}
.teaching-years{
  color:var(--ink-soft);
  font-size:14.5px;
  white-space:nowrap;
}
.teaching-level{
  margin-top:4px;
  color:var(--ink-soft);
  font-size:14.5px;
}