/* ===== themes (Minimal Mistakes default / dark skins) ===== */
:root,
html[data-theme="light"] {
  --bg: #ffffff;
  --bg-soft: #f7f8f9;
  --text: #494e52;
  --heading: #313639;
  --muted: #7a8288;
  --link: #2f7d95;
  --link-hover: #1f5a6b;
  --border: #e4e7eb;
  --masthead: rgba(255, 255, 255, .92);
  --warn: #b35c00;
  --ok: #2c8a3d;
  --shadow: rgba(0, 0, 0, .08);
}

html[data-theme="dark"] {
  --bg: #252a34;
  --bg-soft: #2c323d;
  --text: #eaeaea;
  --heading: #f5f5f5;
  --muted: #9aa3ad;
  --link: #7cc9e8;
  --link-hover: #aadcf0;
  --border: #3a414d;
  --masthead: rgba(37, 42, 52, .92);
  --warn: #f0a55a;
  --ok: #6fcf7f;
  --shadow: rgba(0, 0, 0, .35);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Roboto", "Segoe UI", "Helvetica Neue", "Lucida Grande", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  transition: background .25s, color .25s;
}

a {
  color: var(--link);
  text-decoration: none;
}

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

h2.section-title {
  color: var(--heading);
  font-size: 1.25rem;
  font-weight: 700;
  padding-bottom: .5rem;
  margin: 2.8rem 0 1.2rem;
  border-bottom: 1px solid var(--border);
}

/* ===== masthead ===== */
.masthead {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--masthead);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.masthead-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: .9rem 1.5rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .4rem 1.6rem;
}

.site-title {
  color: var(--heading);
  font-weight: 700;
  font-size: 1.05rem;
  margin-right: auto;
}

.site-title:hover {
  color: var(--heading);
  text-decoration: none;
}

.nav {
  display: flex;
  list-style: none;
  gap: 1.4rem;
  align-items: center;
}

.nav a {
  color: var(--muted);
  font-size: .95rem;
  position: relative;
}

.nav a:hover {
  color: var(--heading);
  text-decoration: none;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--muted);
  transform: scaleX(0);
  transition: transform .2s;
}

.nav a:hover::after {
  transform: scaleX(1);
}

.themebtn {
  font: inherit;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 2.1rem;
  height: 2.1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.themebtn:hover {
  color: var(--heading);
  border-color: var(--muted);
}

/* ===== page layout: sidebar | content | media ===== */
.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2.2rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 260px;
  grid-template-areas: "side main media";
  gap: 3rem;
  align-items: start;
}

.sidebar {
  grid-area: side;
  position: sticky;
  top: 5.5rem;
}

.content {
  grid-area: main;
}

.media {
  grid-area: media;
  position: sticky;
  top: 5.5rem;
}

/* ===== sidebar / author card ===== */
.avatar {
  width: 100%;
  max-width: 180px;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid var(--border);
  padding: 5px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.avatar .initials {
  display: none;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-soft);
  color: var(--muted);
  font-size: 2.6rem;
  font-weight: 700;
  align-items: center;
  justify-content: center;
}

.avatar.noimg img {
  display: none;
}

.avatar.noimg .initials {
  display: flex;
}

.author-name {
  color: var(--heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1rem 0 .2rem;
}

.author-bio {
  color: var(--muted);
  font-size: .85rem;
  line-height: 1.45;
  margin-bottom: 1rem;
}

.author-urls {
  list-style: none;
  font-size: .88rem;
}

.author-urls li {
  margin-bottom: .45rem;
}

.author-urls a {
  color: var(--text);
}

.author-urls a:hover {
  color: var(--link);
}

.author-urls i {
  width: 1.4em;
  color: var(--muted);
  margin-right: .35rem;
  text-align: center;
}

/* ===== intro ===== */
.intro p {
  margin-bottom: 1.1rem;
}

.interests {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: .2rem;
}

.interests span {
  font-size: .8rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .15rem .7rem;
  background: var(--bg-soft);
}

/* ===== news ===== */
ul.news {
  list-style: none;
}

ul.news li {
  display: grid;
  grid-template-columns: 3.6rem 1fr;
  gap: .6rem;
  padding: .5rem 0;
  border-bottom: 1px dashed var(--border);
  font-size: .95rem;
}

ul.news li:last-child {
  border-bottom: none;
}

.date {
  color: var(--muted);
  font-weight: 700;
  font-size: .85rem;
  padding-top: .1rem;
}

/* ===== projects / publications (archive list items) ===== */
.item {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  align-items: start;
  gap: 1.4rem;
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--border);
}

.item:last-of-type {
  border-bottom: none;
}

.item .thumb img {
  display: block;
  width: 100%;
  height: 130px;
  object-fit: contain;
  background: var(--bg-soft);
  border-radius: 6px;
  border: 1px solid var(--border);
  cursor: zoom-in;
  transition: opacity .15s, border-color .15s;
}

.item .thumb img:hover {
  opacity: .85;
  border-color: var(--link);
}

.item.nothumb {
  grid-template-columns: 1fr;
}

.ptitle {
  color: var(--heading);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: .35rem;
}

.ptitle a {
  color: var(--heading);
}

.ptitle a:hover {
  color: var(--link);
}

.authors {
  color: var(--muted);
  font-size: .9rem;
  margin-bottom: .2rem;
}

.me {
  color: var(--text);
  font-weight: 700;
}

.venue {
  color: var(--muted);
  font-size: .85rem;
  font-style: italic;
  margin-bottom: .5rem;
}

.venue.hot {
  color: var(--warn);
}

.venue.ok {
  color: var(--ok);
  font-weight: 700;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.links a {
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--link);
  border: 1px solid var(--link);
  border-radius: 4px;
  padding: .1rem .55rem;
}

.links a:hover {
  color: var(--bg);
  background: var(--link);
  text-decoration: none;
}

.abs {
  display: none;
  margin-top: .8rem;
  padding: .75rem .9rem;
  border-left: 3px solid var(--link);
  background: var(--bg-soft);
  color: var(--text);
  font-size: .88rem;
  border-radius: 0 6px 6px 0;
}

.abs.open {
  display: block;
}

/* ===== about ===== */
.about p {
  margin-bottom: 1.1rem;
}

/* ===== media column carousels ===== */
.carousel {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 6px;
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: zoom-in;
  box-shadow: 0 4px 14px var(--shadow);
  transition: border-color .15s;
}

.carousel:hover {
  border-color: var(--link);
}

.carousel img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .8s ease;
}

.carousel img.active {
  opacity: 1;
}

.cap {
  font-size: .78rem;
  color: var(--muted);
  text-align: center;
  margin: .45rem 0 1.4rem;
}

/* ===== footer ===== */
.foot {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--muted);
  font-size: .8rem;
  text-align: center;
  padding: 1.6rem 1rem;
}

/* ===== lightbox ===== */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, .86);
  backdrop-filter: blur(3px);
  padding: 2rem 1rem 1rem;
  cursor: zoom-out;
}

#lightbox.open {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .8rem;
}

#lightbox img {
  max-width: 100%;
  max-height: calc(100vh - 7rem);
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  cursor: default;
}

#lb-cap {
  color: #d0d4d8;
  font-size: .85rem;
  text-align: center;
  max-width: 60ch;
}

#lb-nav {
  display: none;
  gap: .5rem;
  align-items: center;
  cursor: default;
}

#lb-nav.on {
  display: flex;
}

#lb-nav button,
#lb-close {
  font: inherit;
  color: #eaeaea;
  background: transparent;
  border: 1px solid #5a616b;
  border-radius: 6px;
  padding: .2rem .7rem;
  cursor: pointer;
}

#lb-nav button:hover,
#lb-close:hover {
  color: #fff;
  border-color: #fff;
}

#lb-count {
  color: #d0d4d8;
  font-size: .8rem;
  min-width: 4.5rem;
  text-align: center;
}

#lb-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  font-size: 1.3rem;
  line-height: 1;
  padding: .25rem .6rem;
}

/* ===== pages without the media column ===== */
.page.nomedia {
  grid-template-columns: 220px minmax(0, 1fr);
  grid-template-areas: "side main";
}

.page-title {
  color: var(--heading);
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: .4rem;
}

.page-lead {
  color: var(--muted);
  margin-bottom: 1rem;
}

.all-link {
  margin-top: 1.2rem;
  font-weight: 600;
}

/* ===== responsive ===== */
@media (max-width: 1100px) {
  .page.nomedia {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 2.2rem;
  }

  .page {
    grid-template-columns: 200px minmax(0, 1fr);
    grid-template-areas:
      "side main"
      "side media";
    gap: 2.2rem;
  }

  .media {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 1rem;
  }
}

@media (max-width: 760px) {
  .masthead-inner {
    padding: .7rem 1rem;
  }

  .nav {
    gap: 1rem;
  }

  .page,
  .page.nomedia {
    padding: 1.5rem 1rem 2.5rem;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "side"
      "media"
      "main";
    gap: 1.5rem;
  }

  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: 96px 1fr;
    column-gap: 1rem;
    align-items: center;
  }

  .avatar {
    grid-row: span 2;
  }

  .avatar .initials {
    font-size: 1.6rem;
  }

  .author-name {
    margin-top: 0;
  }

  .author-bio {
    margin-bottom: 0;
  }

  .author-urls {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: .3rem 1rem;
    margin-top: 1rem;
  }

  .author-urls li {
    margin: 0;
  }

  .item {
    grid-template-columns: 1fr;
    gap: .9rem;
  }

  .item .thumb img {
    height: 180px;
  }

  h2.section-title {
    margin-top: 2rem;
  }
}

@media (max-width: 460px) {
  .media {
    grid-template-columns: 1fr;
  }
}