/* ===== Theme Tokens ===== */
:root {
  --primary-blue: #2196F3;
  --hover-blue: #2195f313;
  --hover-blue-mid: #2195f35b;
  --hover-blue-2: #2195f391;

  /* base (light by default) */
  --bg: #ffffff;
  --text: #0b0b0b;
  --muted: #777777;
  --border: #eaeaea;
  --nav-bg: rgba(255,255,255,0.82);
  --nav-text: var(--text);
  --card-shadow: 0 2px 6px rgba(0, 0, 0, 0.40);
  --nav-offset: 3.5rem;
  --news-highlight: rgba(255, 235, 59, 0.35);
}

/* Dark mode (cards keep their look; site chrome flips) */
:root.dark {
  --bg: #0b0b0b;
  --text: #f5f7fa;
  --muted: #c4c7cc;
  --border: #26282c;
  --nav-bg: rgba(12,12,12,0.92);
  --nav-text: var(--text);
  --card-shadow: 0 2px 10px rgba(255, 255, 255, 0.35); 
  --news-highlight: rgba(255, 235, 59, 0.20);
}

@media (max-width: 800px) {
  :root {
    --nav-offset: 4.5rem;
  }
}

html { transition: background-color .25s ease, color .25s ease; }
html, body, h1, h2, h3, h4, h5, h6 {
  font-family: "HelveticaNeue Light","HelveticaNeue-Light","Helvetica Neue Light","Helvetica Neue",Helvetica,Arial,"Lucida Grande",sans-serif;
  margin: 0; padding: 0; font-weight: 300;
}
/* Stop forcing headings to 300; give them a normal/medium weight */
h1, h2, h3, h4, h5, h6 { 
  font-weight: 400;                  /* or 500 if you want a bit stronger */
}

.text-block h1 b, 
.text-block h1 strong {
  font-weight: 700 !important;       /* ensure real bold shows */
}

body { background: var(--bg); color: var(--text); }
hr {
  border: 0 !important;
  border-top: 1px solid var(--border) !important;
  height: 0;                /* ensure it doesn't add extra thickness */
  background: transparent;  /* override any default backgrounds */
}

p { font-size: 17px; margin: .5rem 0; color: var(--text); }
p > b,
p > strong {
  font-weight: 500;
}
a { text-decoration: none; color: var(--primary-blue); }
a:hover { color: var(--hover-blue-2); }

.container {
  max-width: 990px;
  margin: 2rem auto;
  padding: 0 1rem;
}
.w3-content.container { padding-top: var(--nav-offset); }

/* Sticky Navigation */
nav.w3-bar.site-nav {
  z-index: 100;
  position: fixed;
  max-width: 1000px;
  left: 50%;
  transform: translateX(-50%); top: 0;
  border-bottom: 1px solid var(--border);
  background: var(--nav-bg);
  margin-bottom: 2rem;
  color: var(--nav-text);
  backdrop-filter: saturate(120%) blur(8px);
}

.site-nav .site-brand {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--nav-text);
}

.site-nav .site-brand .duck-icon {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

/* Toggle button */
.theme-toggle {
  display: inline-flex;
  align-items: flex-end;       /* was: bottom */
  justify-content: flex-start; /* was: bottom */
  gap: .25rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px 12px;
  margin-left: .25rem;
  color: var(--nav-text);
}
.theme-toggle:hover { opacity: .85; }

/* Nudge the toggle icon down so its bottom lines up with the text */
.theme-toggle .fa,
.theme-toggle svg {
  position: relative;
  top: 4px;
  font-size: 17px;
  line-height: 1;
}

/* By default, only show outline */
.theme-toggle .icon-moon-filled { display: none; }
.theme-toggle .icon-moon-outline { display: inline-block; }

/* In dark mode, show the filled moon (sharp tips from FA icon) */
.theme-toggle.is-dark .icon-moon-outline { display: none; }
.theme-toggle.is-dark .icon-moon-filled  { display: inline-block; }


/* Nav items */
nav .w3-bar-item { font-weight: 400; color: var(--nav-text); }
nav .w3-right    { margin-left: auto; font-size: 1rem; color: var(--primary-blue); }
nav .w3-right:hover { background-color: transparent!important; color: var(--hover-blue-2)!important; }
nav .w3-bar-item,
nav .w3-bar-item.w3-button,
nav .theme-toggle {
  background-color: transparent!important; /* keep every control glass over the nav */
}
nav .w3-bar-item.w3-button:hover { background-color: transparent!important; color: var(--primary-blue)!important; }
nav .w3-bar-item.active { color: var(--primary-blue); }
nav .w3-bar-item.active:hover,
nav .w3-bar-item:not(.active):hover { color: var(--hover-blue-2)!important; }

section { margin-bottom: 3rem; }

/* Profile Header Grid (from your <style>, moved here) */
.profile-header {
  display: grid;
  grid-template-columns: minmax(220px, 35%) 1fr;
  grid-template-rows: auto auto;
  grid-template-areas:
    "image text"
    "contact contact";
  column-gap: 2.25rem;
  row-gap: 1.25rem;
  padding: 0;
  align-items: start;
}
.profile-header .about-img {
  grid-area: image;
  width: 100%;
  height: auto;
  border-radius: 4%;
  justify-self: center;
  align-self: center;
}
.profile-header .contact-info { 
  grid-area: contact; 
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: .25rem 0 0;
  width: 70%;
  margin: 0 auto;
  justify-self: center;
  flex-wrap: wrap;
  text-align: center;
}
.profile-header .text-block   { 
  grid-area: text; 
  align-self: center;
}
.profile-header .contact-link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: 1rem;
  color: var(--text);
  white-space: nowrap;
  justify-content: center;
}
.profile-header .contact-link:hover { color: var(--primary-blue); }

/* Mobile override */
@media (max-width: 800px) {
  .profile-header {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    grid-template-areas:
      "image contact"
      "text text";
    gap: 1.5rem;
    align-items: center;
  }
  .profile-header .about-img { width: 220px; }
  .profile-header .contact-info {
    justify-self: start;
    align-self: center;
    justify-content: flex-start;
    flex-direction: column;
    align-items: flex-start;
    gap: .75rem;
    flex-wrap: wrap;
    width: 100%;
    margin: 0;
  }
  .profile-header .contact-link {
    justify-content: flex-start;
    white-space: normal;
  }
  .profile-header .text-block {
    width: 95%;
    justify-self: center;
  }
}

/* Headings */
h2 { font-size: 35px; text-align: center; color: var(--text);}

/* Projects grid */
.projects-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

/* Flip-card container (cards keep their look in both themes) */
.project-card { width: 300px; perspective: 1000px; }
.flip-card-inner {
  position: relative;
  width: 100%;
  padding-bottom: 125%;
  transition: transform .6s;
  transform-style: preserve-3d;
}
.project-card:hover .flip-card-inner { transform: rotateY(180deg); }
.project-card:hover .flip-card-front {
  opacity: 0;
  pointer-events: none;
}

/* Faces */
.flip-card-front,
.flip-card-back {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  -moz-backface-visibility: hidden;
  border-radius: 4%;
  overflow: hidden;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 1rem;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255,255,255,0.06);
  background-color: var(--hover-blue);
  transition: background-color .3s;
}

/* Front: image only */
.flip-card-front {
  transform: rotateY(0deg);
  transition: opacity .3s;
  justify-content: flex-start;
  gap: .75rem;
}
.flip-card-front img {
  width: 100%;
  max-height: 100%;
  object-fit: cover;
  flex: 1 1 auto;
  border-radius: 4%;
}
.flip-card-front h4 {
  margin: 0;
  font-weight: 500;
  text-align: center;
  color: var(--primary-blue);
}

/* Back: title, desc, links */
.flip-card-back { transform: rotateY(180deg); text-align: center; }
.flip-card-back h4 {
  margin: .75rem 0 .5rem;
  font-weight: 400;
  color: var(--primary-blue);
}
.flip-card-back .links { display: flex; gap: 1rem; margin-top: auto; margin-bottom: 0.5rem;}
.flip-card-back .links a { color: var(--primary-blue); text-decoration: none; font-weight: 400; }
.flip-card-back .links a:hover { color: var(--hover-blue-mid); }

/* Papers table */
#papertitle { color: var(--primary-blue); font-size: 20px; margin: 0; padding: 0; }
table.featured-papers,
table.papers {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 1rem;
  color: var(--text);
}
.papers .thumbs { padding: 10px; width: 40%; vertical-align: middle; }
.papers .detail { padding: 10px; vertical-align: middle; }
.papers img.thumbs { width: 100%; height: auto; }

/* Footer */
footer { text-align: center; font-size: .875rem; color: var(--muted); margin-top: 2rem; }

/* Photo gallery */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .5rem;
  grid-auto-flow: row dense;
}
.photo-item { overflow: hidden; }
.photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 2%;
}
/* Landscape spans */
.photo-item.land-left  { grid-column: 1 / span 2; }
.photo-item.land-right { grid-column: 2 / span 2; }

/* a11y helper */
.sr-only {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px,1px,1px,1px);
  white-space: nowrap;
}


.p2-portrait{
  position: relative; width: min(420px, 90%); aspect-ratio: 1/1;
  margin: 0 auto; perspective: 900px; transform-style: preserve-3d;
  --rx:0deg; --ry:0deg; --tx:0px; --ty:0px;
}
.p2-portrait .p2-bg,
.p2-portrait .p2-fg{ position:absolute; inset:0; width:100%; height:100%; border-radius:8px; }
.p2-portrait .p2-bg{ object-fit: cover; filter: blur(1px) saturate(0.98); }

/* foreground canvas tilts */
.p2-portrait .p2-fg{
  transform: translateZ(35px) rotateX(var(--rx)) rotateY(var(--ry))
             translate(var(--tx), var(--ty));
  transition: transform .15s ease-out;
  will-change: transform;
}

@keyframes p2-wobble{
  0%{ transform: translateZ(35px) rotateX(0) rotateY(0); }
  40%{ transform: translateZ(35px) rotateX(-3deg) rotateY(2.5deg) translate(2px,-1px); }
  70%{ transform: translateZ(35px) rotateX( 2deg) rotateY(-2deg) translate(-1px,1px); }
  100%{transform: translateZ(35px) rotateX(0) rotateY(0); }
}
.p2-portrait .p2-fg.wobble{ animation: p2-wobble 1200ms ease-in-out; }




/* News: true 2-column layout, stays inside .container */
.news-list p{
  --news-date-w: 18ch;           /* width of the date column; tweak to taste */
  display: grid;
  grid-template-columns: var(--news-date-w) 1fr;
  column-gap: 1rem;
  align-items: start;
  margin: .25rem 0.25rem;
  padding: .5rem 0.5rem;
  border-radius: 8px;
}

.news-list {
  width: 95%;
  margin: 0 auto;
  max-height: 260px;
  overflow-y: auto;
  padding: .5rem 0.5rem;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.025);
}

.dark .news-list {
  background: rgba(255, 255, 255, 0.05);
}

.news-list p b{
  grid-column: 1;
  font-weight: 700;
  white-space: nowrap;           /* keep date on one line */
  text-align: right;             /* matches your screenshot style */
  color: var(--text);
}

.news-list p span{
  grid-column: 2;                /* wrapped lines align with the text start */
  display: block;
  color: var(--text);
}

.news-list p.highlight{
  background: var(--news-highlight);
}

/* Optional: slightly narrower date column on small screens */
@media (max-width: 560px){
  .news-list p{ --news-date-w: 14ch; }
}