/* al-folio-inspired academic theme */
:root {
  --global-bg-color: #ffffff;
  --global-code-bg-color: rgba(181, 9, 172, 0.05);
  --global-text-color: #000000;
  --global-text-color-light: #828282;
  --global-theme-color: #b509ac;
  --global-hover-color: #b509ac;
  --global-footer-bg-color: #1c1c1d;
  --global-footer-text-color: #e8e8e8;
  --global-footer-link-color: #ffffff;
  --global-divider-color: rgba(0, 0, 0, 0.1);
  --global-card-bg-color: #ffffff;
  --global-badge-bg: #00369f;
  --global-badge-text: #ffffff;
  --global-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --global-bg-color: #1c1c1d;
    --global-code-bg-color: #2c3237;
    --global-text-color: #e8e8e8;
    --global-text-color-light: #9aa0a6;
    --global-theme-color: #2698ba;
    --global-hover-color: #2698ba;
    --global-footer-bg-color: #e8e8e8;
    --global-footer-text-color: #1c1c1d;
    --global-footer-link-color: #000000;
    --global-divider-color: #424246;
    --global-card-bg-color: #212529;
    --global-badge-bg: #2698ba;
    --global-badge-text: #ffffff;
    --global-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --global-bg-color: #1c1c1d;
  --global-code-bg-color: #2c3237;
  --global-text-color: #e8e8e8;
  --global-text-color-light: #9aa0a6;
  --global-theme-color: #2698ba;
  --global-hover-color: #2698ba;
  --global-footer-bg-color: #e8e8e8;
  --global-footer-text-color: #1c1c1d;
  --global-footer-link-color: #000000;
  --global-divider-color: #424246;
  --global-card-bg-color: #212529;
  --global-badge-bg: #2698ba;
  --global-badge-text: #ffffff;
  --global-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--global-bg-color);
  color: var(--global-text-color);
  font-family: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.6;
  transition: background-color 0.2s, color 0.2s;
}
a { color: var(--global-theme-color); text-decoration: none; }
a:hover { color: var(--global-hover-color); text-decoration: underline; }
b, strong { font-weight: 500; }
h1, h2, h3, h4 { font-weight: 400; line-height: 1.25; }
hr { border: 0; border-top: 1px solid var(--global-divider-color); margin: 2rem 0; }

/* ---------- navbar ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--global-bg-color);
  border-bottom: 1px solid var(--global-divider-color);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  transition: background-color 0.2s;
}
.navbar .inner {
  max-width: 930px; margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px;
}
.navbar .brand { color: var(--global-text-color); font-size: 1.2rem; font-weight: 300; white-space: nowrap; }
.navbar .brand .first { font-weight: 500; }
.navbar .brand:hover { text-decoration: none; color: var(--global-theme-color); }
.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block; padding: 8px 12px; color: var(--global-text-color);
  font-weight: 300; font-size: 1rem;
}
.nav-links a:hover { color: var(--global-theme-color); text-decoration: none; }
.nav-links a.active { color: var(--global-theme-color); font-weight: 400; }
.nav-links a.active::after { content: ""; }
.icon-btn {
  background: none; border: 0; cursor: pointer; padding: 8px 10px;
  color: var(--global-text-color); font-size: 1rem;
}
.icon-btn:hover { color: var(--global-theme-color); }
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .nav-toggle { display: inline-block; font-size: 1.25rem; }
  .nav-links {
    display: none; position: absolute; top: 56px; left: 0; right: 0;
    flex-direction: column; align-items: flex-end;
    background: var(--global-bg-color);
    border-bottom: 1px solid var(--global-divider-color);
    padding: 8px 16px;
  }
  .nav-links.open { display: flex; }
}

/* ---------- layout ---------- */
.container { max-width: 930px; margin: 0 auto; padding: 88px 16px 48px; }
.post-header { margin-bottom: 1.5rem; }
.post-title { font-size: 2.6rem; font-weight: 300; margin: 0 0 0.25rem; }
.post-title .first { font-weight: 500; }
.post-description { color: var(--global-text-color-light); margin: 0; font-size: 1rem; }
.post-description a { color: var(--global-text-color-light); }
.post-description a:hover { color: var(--global-theme-color); }

h2.section {
  font-size: 1.5rem; font-weight: 400; margin: 2.75rem 0 1rem;
}
h2.section a { color: var(--global-text-color); }
h2.section a:hover { color: var(--global-theme-color); text-decoration: none; }

/* ---------- about ---------- */
.profile { float: right; width: 32%; max-width: 260px; margin: 0 0 1rem 1.75rem; }
.profile img {
  width: 100%; height: auto; display: block; border-radius: 4px;
  box-shadow: var(--global-shadow);
}
.profile .more-info {
  margin-top: 0.6rem; font-size: 0.85rem; line-height: 1.45;
  font-family: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--global-text-color-light); text-align: right;
}
.profile .more-info p { margin: 0; }
.clearfix::after { content: ""; display: table; clear: both; }
.bio p { margin: 0 0 1rem; }
.interests { margin: 0 0 1rem; padding-left: 1.2rem; }
.interests li { margin-bottom: 0.2rem; }

@media (max-width: 576px) {
  .profile { float: none; width: 62%; max-width: 240px; margin: 0 auto 1.25rem; }
  .profile .more-info { text-align: center; }
  .post-title { font-size: 2rem; }
}

/* ---------- news ---------- */
.news { width: 100%; border-collapse: collapse; }
.news td { padding: 6px 0; vertical-align: top; border: 0; }
.news th {
  text-align: left; font-weight: 500; white-space: nowrap;
  padding: 6px 1.5rem 6px 0; vertical-align: top; width: 1%;
  font-size: 0.95rem;
}

/* ---------- publications ---------- */
.bibliography { list-style: none; padding: 0; margin: 0; }
.year-heading {
  text-align: right; font-size: 3.5rem; font-weight: 300;
  color: var(--global-divider-color); margin: 2rem 0 -1.5rem; line-height: 1;
}
.pub-group-title { font-size: 1.25rem; font-weight: 400; margin: 2.25rem 0 0.75rem; }
.pub { display: flex; gap: 1rem; padding: 1rem 0; }
.pub + .pub { border-top: 1px dashed var(--global-divider-color); }
.pub .abbr { flex: 0 0 96px; padding-top: 3px; }
.badge {
  display: inline-block; min-width: 76px; text-align: center;
  padding: 4px 6px; border-radius: 3px; font-size: 0.75rem; font-weight: 500;
  background: var(--global-badge-bg); color: var(--global-badge-text);
  line-height: 1.3;
}
.badge.alt { background: #6c757d; }
.pub .body { flex: 1; min-width: 0; }
.pub .title { font-weight: 500; margin-bottom: 0.15rem; }
.pub .author { font-size: 0.95rem; }
.pub .author em.me { font-style: normal; font-weight: 500; border-bottom: 1px solid currentColor; }
.pub .periodical { font-size: 0.95rem; color: var(--global-text-color-light); }
.pub .periodical em { font-style: italic; }
.pub .note { font-size: 0.85rem; color: var(--global-theme-color); margin-left: 0.25rem; }
.links { margin-top: 0.4rem; display: flex; flex-wrap: wrap; gap: 6px; }
.links a, .links button {
  font-family: inherit; font-size: 0.75rem; font-weight: 400; text-transform: uppercase;
  letter-spacing: 0.02em;
  border: 1px solid var(--global-text-color); color: var(--global-text-color);
  background: transparent; border-radius: 3px; padding: 1px 8px; cursor: pointer;
  line-height: 1.6;
}
.links a:hover, .links button:hover, .links button[aria-expanded="true"] {
  color: var(--global-theme-color); border-color: var(--global-theme-color); text-decoration: none;
}
.bibtex {
  display: none; margin-top: 0.6rem; padding: 0.75rem 1rem;
  background: var(--global-code-bg-color); border-radius: 4px;
  font-family: "Roboto Mono", ui-monospace, Menlo, monospace; font-size: 0.78rem;
  white-space: pre; overflow-x: auto; line-height: 1.5;
}
.bibtex.open { display: block; }
@media (max-width: 576px) {
  .pub { flex-direction: column; gap: 0.4rem; }
  .pub .abbr { flex: none; }
}

/* ---------- social ---------- */
.social { text-align: center; margin-top: 3rem; }
.social .icons { font-size: 2rem; display: flex; justify-content: center; gap: 1.1rem; flex-wrap: wrap; }
.social .icons a { color: var(--global-text-color); }
.social .icons a:hover { color: var(--global-theme-color); text-decoration: none; }
.social .contact-note { color: var(--global-text-color-light); font-size: 0.95rem; margin-top: 0.75rem; }

/* ---------- projects ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.25rem; }
.card {
  background: var(--global-card-bg-color);
  border: 1px solid var(--global-divider-color); border-radius: 6px;
  overflow: hidden; box-shadow: var(--global-shadow);
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 6px 16px rgba(0,0,0,0.12); }
.card .cover {
  height: 110px; display: flex; align-items: center; justify-content: center;
  font-size: 2.4rem; color: #fff;
}
.card .card-body { padding: 1rem 1.1rem 1.1rem; flex: 1; display: flex; flex-direction: column; }
.card h3 { margin: 0 0 0.4rem; font-size: 1.1rem; font-weight: 500; }
.card p { margin: 0 0 0.75rem; font-size: 0.92rem; }
.card .meta { margin-top: auto; font-size: 0.8rem; color: var(--global-text-color-light); }
.tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 0.5rem; }
.tag {
  font-size: 0.72rem; padding: 1px 7px; border-radius: 10px;
  background: var(--global-code-bg-color); color: var(--global-text-color);
}
.cat-title { font-size: 1.35rem; font-weight: 400; margin: 2.25rem 0 1rem; }
.cat-title:first-of-type { margin-top: 0.5rem; }

/* ---------- cv ---------- */
.cv-download { float: right; font-size: 0.9rem; margin-top: -3.6rem; }
.cv-download a {
  border: 1px solid var(--global-theme-color); border-radius: 4px; padding: 4px 12px;
}
.cv-download a:hover { background: var(--global-theme-color); color: #fff; text-decoration: none; }
.cv-card {
  border: 1px solid var(--global-divider-color); border-radius: 6px;
  background: var(--global-card-bg-color); margin-bottom: 1.5rem; overflow: hidden;
}
.cv-card > h3 {
  margin: 0; padding: 0.75rem 1.1rem; font-size: 1.15rem; font-weight: 500;
  border-bottom: 1px solid var(--global-divider-color);
  color: var(--global-theme-color);
}
.cv-item { display: flex; gap: 1rem; padding: 0.9rem 1.1rem; }
.cv-item + .cv-item { border-top: 1px solid var(--global-divider-color); }
.cv-date { flex: 0 0 120px; }
.cv-date .badge { min-width: 0; width: 100%; font-weight: 400; background: var(--global-badge-bg); }
.cv-main { flex: 1; min-width: 0; }
.cv-main .cv-title { font-weight: 500; }
.cv-main .cv-sub { color: var(--global-text-color-light); font-size: 0.92rem; }
.cv-main ul { margin: 0.4rem 0 0; padding-left: 1.1rem; font-size: 0.93rem; }
.cv-main ul li { margin-bottom: 0.2rem; }
.cv-main .group { font-size: 0.85rem; font-weight: 500; margin-top: 0.5rem; color: var(--global-text-color-light); text-transform: uppercase; letter-spacing: 0.04em; }
.skills { display: grid; grid-template-columns: 170px 1fr; gap: 0.5rem 1rem; padding: 0.9rem 1.1rem; font-size: 0.93rem; }
.skills dt { font-weight: 500; }
.skills dd { margin: 0; }
@media (max-width: 576px) {
  .cv-item { flex-direction: column; gap: 0.4rem; }
  .cv-date { flex: none; }
  .cv-date .badge { width: auto; }
  .skills { grid-template-columns: 1fr; gap: 0.1rem; }
  .skills dd { margin-bottom: 0.5rem; }
  .cv-download { float: none; margin: 0 0 1rem; }
}

/* ---------- footer ---------- */
footer {
  background: var(--global-footer-bg-color); color: var(--global-footer-text-color);
  text-align: center; font-size: 0.85rem; padding: 14px 16px;
}
footer a { color: var(--global-footer-link-color); }