/* ============================
   Lei Li's Homepage - Stylesheet
   Clean academic one-page design
   ============================ */

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: #fff;
  padding: 50px;
  font: 15px/1.6 "Noto Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #555;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: #267CB9;
  color: #fff;
}

/* Layout */
.wrapper {
  width: 1100px;
  margin: 0 auto;
}

header {
  width: 260px;
  float: left;
  position: fixed;
}

section {
  width: 780px;
  float: right;
  padding-bottom: 50px;
}

footer {
  width: 260px;
  float: left;
  position: fixed;
  bottom: 50px;
  font-size: 12px;
  color: #aaa;
}

footer a {
  color: #aaa;
  font-size: 12px;
}

footer a:hover {
  color: #267CB9;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: #222;
  margin: 0 0 10px;
  font-weight: 700;
}

h1 {
  font-size: 26px;
  margin-bottom: 4px;
}

h2 {
  font-size: 18px;
  border-bottom: 2px solid #f0f0f0;
  padding-bottom: 6px;
  margin-top: 30px;
  margin-bottom: 14px;
  padding-left: 10px;
  border-left: 3px solid #267CB9;
}

section > h2:first-of-type {
  margin-top: 8px;
}

h3 {
  font-size: 15px;
  color: #444;
  margin-top: 20px;
  margin-bottom: 10px;
}

p {
  margin: 0 0 12px;
}

/* Links */
a {
  color: #267CB9;
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: #1a5a8a;
  text-decoration: underline;
}

a.ppl {
  color: #666;
}

a.ppl:hover {
  color: #267CB9;
}

a.adv {
  color: #333;
  font-weight: 500;
}

a.code {
  color: #1D8A4D;
  font-size: 12.5px;
  font-weight: 500;
}

a.code:hover {
  color: #14683a;
}

a.award {
  color: #E06060;
  font-size: 12px;
  font-weight: 600;
}

/* Header / Sidebar */
header h1 {
  color: #222;
}

header p.subtitle {
  color: #666;
  font-size: 13px;
  margin-bottom: 8px;
  line-height: 1.5;
}

header img {
  width: 100%;
  border-radius: 8px;
  margin: 14px 0;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

header ul.contact {
  list-style: none;
  padding: 0;
  margin: 14px 0 0 0;
}

header ul.contact li {
  margin-bottom: 7px;
  font-size: 13px;
  color: #555;
}

header ul.contact li i {
  width: 18px;
  text-align: center;
  margin-right: 7px;
  color: #777;
  font-size: 14px;
}

header ul.contact li a {
  color: #555;
}

header ul.contact li a:hover {
  color: #267CB9;
  text-decoration: none;
}

/* Bio */
.bio {
  font-size: 15px;
  line-height: 1.75;
  color: #444;
}

/* News */
ul.news {
  list-style: none;
  padding: 0;
}

ul.news li {
  margin: 0 0 7px;
  padding-left: 0;
  font-size: 14px;
  line-height: 1.55;
}

ul.news li .date {
  color: #999;
  font-size: 13px;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  margin-right: 4px;
}

.highlight-gold {
  color: #D4AF37;
  font-weight: 700;
}

.highlight-red {
  color: #D44;
  font-weight: 700;
}

/* Education & Experience lists */
ul.exp {
  list-style: none;
  padding: 0;
}

ul.exp li {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.5;
}

ul.exp li .role {
  font-weight: 600;
  color: #333;
}

ul.exp li .org a {
  font-weight: 500;
}

ul.exp li .period {
  color: #999;
  font-size: 13px;
}

ul.exp li .mentor {
  font-size: 13px;
  color: #888;
  display: block;
  margin-top: 1px;
}

/* Publications */
ul.pub-list {
  list-style: none;
  padding: 0;
}

ul.pub-list > li {
  margin: 0 0 16px;
  line-height: 1.55;
}

ul.pub-list > li .title {
  font-weight: 600;
  color: #222;
}

a.title-link {
  color: #222;
  font-weight: 600;
}

a.title-link:hover {
  color: #267CB9;
  text-decoration: none;
}

ul.pub-list > li .authors {
  font-size: 13.5px;
  color: #666;
  display: block;
  margin-top: 2px;
}

ul.pub-list > li .venue {
  font-style: italic;
  color: #333;
  font-size: 13.5px;
  font-weight: 500;
}

ul.pub-list > li .highlight {
  color: #D44;
  font-weight: 600;
  font-size: 12.5px;
}

ul.pub-list > li .links {
  margin-top: 3px;
  display: block;
}

ul.pub-list > li .links a {
  margin-right: 2px;
}

/* Service, Talks, Awards */
ul.service {
  list-style: none;
  padding: 0;
}

ul.service li {
  margin: 0 0 6px;
  font-size: 14px;
  line-height: 1.55;
}

ul.service li .date {
  color: #999;
  font-size: 12.5px;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  margin-right: 4px;
}

ul.awards {
  list-style: none;
  padding: 0;
}

ul.awards li {
  margin: 0 0 6px;
  font-size: 14px;
  line-height: 1.5;
}

ul.awards li i {
  color: #D4AF37;
  margin-right: 5px;
  width: 16px;
  text-align: center;
}

/* Collapsible sections */
button.toggle-btn {
  display: inline-block;
  cursor: pointer;
  font-size: 14px;
  color: #267CB9;
  font-weight: 500;
  margin-top: 8px;
  margin-bottom: 4px;
  user-select: none;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
}

button.toggle-btn:hover {
  color: #1a5a8a;
  text-decoration: underline;
}

/* Annotation */
.note {
  font-size: 11.5px;
  color: #999;
  margin-bottom: 4px;
}

/* Responsive */
@media screen and (max-width: 960px) {
  .wrapper {
    width: auto;
    margin: 0;
  }

  header, section, footer {
    float: none;
    position: static;
    width: auto;
  }

  header {
    padding-right: 0;
    text-align: center;
    margin-bottom: 24px;
  }

  header img {
    max-width: 180px;
    margin: 10px auto;
    display: block;
  }

  header ul.contact {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 20px;
  }

  section {
    padding-bottom: 30px;
  }

  footer {
    text-align: center;
    margin-top: 30px;
  }
}

@media screen and (max-width: 720px) {
  body {
    padding: 25px;
    word-wrap: break-word;
  }

  h2 {
    font-size: 17px;
  }
}

@media screen and (max-width: 480px) {
  body {
    padding: 15px;
    font-size: 13px;
  }

  header img {
    max-width: 150px;
  }
}

@media print {
  body {
    padding: 0.4in;
    font-size: 12pt;
    color: #444;
  }

  header {
    position: static;
    float: none;
    width: auto;
    text-align: center;
  }

  header img {
    max-width: 120px;
  }

  section {
    float: none;
    width: auto;
  }

  a {
    color: #222;
  }

  a.code, a.award {
    display: none;
  }

  h2 {
    border-left-color: #888;
  }

  footer {
    display: none;
  }
}