/* ============================================
   Academic Homepage - Hugo
   Modern Gradient Theme
   ============================================ */

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1em;
  line-height: 1.7;
  color: #2d3748;
  background: #f7f8fc;
}
a { color: #5a67d8; text-decoration: none; transition: color 0.2s; }
a:hover { color: #434190; text-decoration: underline; }
img { max-width: 100%; height: auto; }
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: #1a202c;
  margin: 1.2em 0 0.5em;
}
h1 { font-size: 1.65em; }
h2 { font-size: 1.4em; }
h3 { font-size: 1.15em; }
ul, ol { padding-left: 1.5em; margin: 0.5em 0; }
code {
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: #edf2f7;
  padding: 0.15em 0.35em;
  border-radius: 4px;
}
p { margin: 0.4em 0 0.8em; }

/* --- Masthead (Navigation) --- */
.masthead {
  background: linear-gradient(135deg, #1e3a5f 0%, #2d5f8a 50%, #1e3a5f 100%);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}
.masthead__inner-wrap {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 1.5em;
}
.masthead__menu { display: flex; align-items: center; }
.greedy-nav {
  display: flex;
  align-items: center;
  width: 100%;
  position: relative;
}
.greedy-nav button {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.25em;
  cursor: pointer;
  padding: 0.5em;
}
.greedy-nav .visible-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.greedy-nav .visible-links li { margin: 0; }
.greedy-nav .visible-links a {
  display: block;
  padding: 0.85em 1.1em;
  color: rgba(255,255,255,0.9);
  font-size: 0.88em;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
}
.greedy-nav .visible-links a:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
  border-bottom-color: rgba(255,255,255,0.5);
  text-decoration: none;
}
.masthead__menu-item--lg a {
  font-size: 1em;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.hidden-links { display: none; }

/* --- Main Layout --- */
#main {
  max-width: 1060px;
  margin: 0 auto;
  padding: 2.5em 1.5em;
  display: flex;
  gap: 2.5em;
}
.page {
  flex: 1;
  min-width: 0;
  background: #fff;
  border-radius: 12px;
  padding: 2em 2.5em;
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
}
.page__content h1 { margin-top: 0.3em; }
.page__content h1:first-child { margin-top: 0; }

/* --- Sidebar --- */
.sidebar {
  width: 270px;
  flex-shrink: 0;
}
.sidebar.sticky {
  position: sticky;
  top: 80px;
  align-self: flex-start;
}

/* --- Author Profile --- */
.profile_box {
  text-align: center;
  background: #fff;
  border-radius: 12px;
  padding: 2em 1.5em;
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
}
.author__avatar {
  margin-bottom: 1em;
}
.author__avatar img {
  width: 170px;
  height: 170px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 20px rgba(90,103,216,0.18);
  border: 3px solid #fff;
}
.author__name {
  font-size: 1.1em;
  margin-bottom: 0.3em;
  color: #1a202c;
}
.author__bio {
  font-size: 0.82em;
  color: #718096;
  margin-bottom: 1em;
  line-height: 1.5;
}
.author__urls-wrapper {
  text-align: left;
  border-top: 1px solid #edf2f7;
  padding-top: 0.75em;
}
.author__urls {
  list-style: none;
  padding: 0;
  margin: 0;
}
.author__urls li {
  padding: 0.35em 0;
  font-size: 0.88em;
}
.author__urls li i {
  width: 1.6em;
  text-align: center;
  color: #5a67d8;
  margin-right: 0.3em;
}
.author__urls li a {
  color: #4a5568;
  transition: color 0.2s;
}
.author__urls li a:hover {
  color: #5a67d8;
}
.author__urls_sm {
  display: none;
}

/* --- Paper Box (legacy) --- */
.paper-box {
  display: flex;
  justify-content: left;
  align-items: center;
  flex-direction: row;
  flex-wrap: wrap;
  border-bottom: 1px #efefef solid;
  padding: 2em 0;
}
.paper-box-image {
  justify-content: center;
  display: flex;
  width: 100%;
  order: 2;
}
.paper-box-image img {
  max-width: 400px;
  box-shadow: 3px 3px 6px #888;
  object-fit: cover;
}
.paper-box-text {
  max-width: 100%;
  order: 1;
}

/* --- Anchor Offset --- */
.anchor::before,
.page__content h1::before,
.page__content h2::before,
.page__content h3::before {
  content: '';
  display: block;
  position: relative;
  width: 0;
  height: 2em;
  margin-top: -2em;
  visibility: hidden;
}

/* --- Badge --- */
.badge {
  padding-left: 1rem;
  padding-right: 1rem;
  position: absolute;
  margin-top: 0.5em;
  margin-left: -0.5em;
  color: white;
  background-color: #00369f;
  font-size: 0.8em;
}

/* --- Collapsible --- */
.container {
  width: 100%;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  overflow: hidden;
}
.container div { width: 100%; }
.container .header {
  background: #edf2f7;
  padding: 0.6em 1em;
  cursor: pointer;
  font-weight: bold;
  font-size: 0.95em;
  color: #2d3748;
  transition: background 0.2s;
}
.container .header:hover { background: #e2e8f0; }
.container .content {
  display: none;
  padding: 1em;
}

/* --- Paper Card --- */
.paper-card {
  position: relative;
  background: #fff;
  border-radius: 10px;
  padding: 1.5em 1.5em 1.5em 1.75em;
  margin-bottom: 1em;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  border-left: 4px solid #ddd;
  transition: box-shadow 0.25s, transform 0.2s;
}
.paper-card:hover {
  box-shadow: 0 6px 24px rgba(90,103,216,0.12);
  transform: translateY(-2px);
}
.paper-tag {
  display: inline-block;
  color: #fff;
  padding: 3px 10px;
  font-size: 0.82em;
  font-weight: 700;
  border-radius: 4px;
  margin-bottom: 0.6em;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.paper-title {
  font-size: 0.82em;
  font-weight: 700;
  color: #1a202c;
  margin-bottom: 0.35em;
  line-height: 1.45;
}
.paper-authors {
  font-size: 0.82em;
  color: #718096;
  margin-bottom: 0.45em;
  line-height: 1.55;
}
.paper-authors strong {
  color: #2d3748;
}
.paper-links {
  display: flex;
  gap: 0.5em;
  flex-wrap: wrap;
}
.paper-links a {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: 0.82em;
  font-weight: 600;
  color: #5a67d8;
  background: #fff;
  border: 1.5px solid #5a67d8;
  border-radius: 5px;
  text-decoration: none;
  transition: all 0.2s;
}
.paper-links a:hover {
  color: #fff;
  background: #5a67d8;
  text-decoration: none;
  transform: translateY(-1px);
}

/* --- Education Card --- */
.edu-card {
  position: relative;
  background: #fff;
  border-radius: 10px;
  padding: 1.2em 1.5em 1.2em 1.75em;
  margin-bottom: 0.8em;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  border-left: 4px solid #5a67d8;
  transition: box-shadow 0.25s, transform 0.2s;
}
.edu-card:hover {
  box-shadow: 0 4px 16px rgba(90,103,216,0.12);
  transform: translateY(-1px);
}
.edu-degree {
  font-size: 1em;
  font-weight: 700;
  color: #1a202c;
}
.edu-school {
  font-size: 0.9em;
  color: #4a5568;
  margin-top: 0.15em;
}
.edu-detail {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.3em;
  flex-wrap: wrap;
  gap: 0.3em;
}
.edu-lab {
  font-size: 0.84em;
  color: #718096;
}
.edu-time {
  font-size: 0.82em;
  font-weight: 600;
  color: #5a67d8;
  background: #edf2f7;
  padding: 2px 8px;
  border-radius: 4px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  #main {
    flex-direction: column-reverse;
    padding: 1em;
    gap: 1.5em;
  }
  .page {
    padding: 1.5em;
    border-radius: 10px;
  }
  .sidebar {
    width: 100%;
  }
  .sidebar.sticky {
    position: relative;
    top: auto;
  }
  .profile_box {
    text-align: center;
  }
  .author__avatar img {
    width: 130px;
    height: 130px;
  }
  .author__urls {
    display: none;
  }
  .author__urls_sm {
    display: flex;
    justify-content: center;
    gap: 0.6em;
    padding: 0.5em 0;
  }
  .author__urls_sm a {
    color: #5a67d8;
    font-size: 1.3em;
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #edf2f7;
    transition: all 0.2s;
  }
  .author__urls_sm a:hover {
    background: #5a67d8;
    color: #fff;
  }
  .greedy-nav button {
    display: block;
  }
  .greedy-nav .visible-links {
    flex-wrap: nowrap;
    overflow: hidden;
  }
  .greedy-nav .visible-links li:not(.masthead__menu-item--lg) {
    display: none;
  }
  .paper-box-text {
    max-width: 100%;
  }
}
@media (min-width: 769px) {
  .paper-box-image {
    justify-content: left;
    min-width: 200px;
    max-width: 40%;
    order: 1;
  }
  .paper-box-text {
    justify-content: left;
    padding-left: 2em;
    max-width: 60%;
    order: 2;
  }
}

/* --- Print --- */
@media print {
  .masthead, .sidebar { display: none; }
  #main { padding: 0; }
  .page { box-shadow: none; border-radius: 0; }
}