:root {
  color-scheme: light;
  --bg: #fdfcf9;
  --surface: #fdfcf9;
  --text: #30343b;
  --muted: #626670;
  --accent: #45558b;
  --accent-hover: #293965;
  --soft: #f0f0eb;
  --teal: #226d70;
  --line: #deded6;
  --hero: var(--bg);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #161a24;
  --surface: #1e2431;
  --text: #edf0f8;
  --muted: #b1bdd2;
  --accent: #b5b9ff;
  --accent-hover: #d3d5ff;
  --soft: #2c304b;
  --teal: #91d7cc;
  --line: #374052;
  --hero: var(--bg);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.7 monospace; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--accent-hover); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--teal); outline-offset: 5px; border-radius: 4px; }
button { font: inherit; }
img { max-width: 100%; height: auto; }
h1,h2,h3 { color: var(--text); line-height: 1.4; letter-spacing: 0; }
h1 { font-size: 2rem; margin: 0 0 22px; font-weight: 700; }
h2 { font-size: 1.35rem; margin: 0 0 24px; font-weight: 700; }
h3 { font-size: 1rem; margin: 0 0 12px; font-weight: 700; }
p { margin: 0 0 18px; }
.container { width: min(940px, calc(100% - 64px)); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.header-inner { min-height: 76px; display: flex; gap: 24px; justify-content: space-between; align-items: center; }
.brand { color: var(--text); font-weight: 700; font-size: 1.45rem; line-height: 1.4; letter-spacing: 0; text-decoration: none; white-space: nowrap; margin: 0; }
.nav { display: flex; align-items: center; gap: 20px; }
.nav a { color: var(--muted); font-size: .85rem; font-weight: 400; text-decoration: underline; padding: 10px 0; }
.nav a:hover,.nav a[aria-current="page"] { color: var(--accent); }
.header-controls { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.language-menu { position: relative; margin: 0; }
.language-menu summary { padding: 8px 4px; color: var(--muted); font-size: .75rem; font-weight: 400; }
.language-nav { position: absolute; right: 0; top: 100%; z-index: 5; display: grid; min-width: 140px; padding: 5px; border: 1px solid var(--line); border-radius: 5px; background: var(--surface); font-size: .82rem; }
.language-nav a { color: var(--muted); padding: 8px 10px; text-decoration: none; }
.language-nav a:hover, .language-nav a:focus-visible { background: var(--soft); color: var(--text); }
.language-nav a[aria-current="page"] { color: var(--text); font-weight: 700; }
.theme-toggle { width: 42px; height: 42px; border: 0; background: transparent; color: var(--text); border-radius: 0; cursor: pointer; display: grid; place-items: center; flex-shrink: 0; font-size: 1.2rem; }
.skip-link { position: absolute; left: 16px; top: -90px; z-index: 10; padding: 10px 18px; background: var(--surface); }
.skip-link:focus { top: 12px; }
.hero { background: var(--hero); border-bottom: 1px solid var(--line); }
.hero-inner { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 38px; align-items: stretch; padding-block: 40px; }
.hero-description { max-width: 650px; font-size: 1rem; color: var(--text); }
.hero-meta { font-size: .85rem; color: var(--muted); margin-bottom: 25px; }
.profile-pic { width: 100%; height: 100%; min-height: 0; object-fit: cover; border-radius: 16px; display: block; }
.actions { display: flex; gap: 24px; flex-wrap: wrap; align-items: center; }
.button { display: inline-flex; align-items: center; min-height: 36px; padding: 0; color: var(--accent); text-decoration: underline; font-weight: 400; font-size: .9rem; }
.button:hover { color: var(--accent-hover); }


main.container > section { padding-block: 38px; border-bottom: 1px solid var(--line); }
main.container > section:last-child { border-bottom: 0; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.section-heading h2 { margin: 0; }
.section-heading a { font-size: .88rem; white-space: nowrap; }
.section-intro { max-width: 700px; color: var(--muted); }
.publication-list { list-style: none; padding: 0; margin: 0; }
.publication-list > li { padding: 22px 0; border-top: 1px solid var(--line); }
.publication-list > li:first-child { border-top: 0; padding-top: 0; }
.publication-list p { margin: 0; }
.publication-list strong { font-weight: 650; }
.publication-meta { color: var(--muted); font-size: .9rem; margin-top: 6px !important; }
.tag { display: block; color: var(--teal); font-size: .8rem; margin-bottom: 7px; }
.publication-links { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 10px; font-size: .86rem; font-weight: 600; }
details { margin-top: 24px; }
summary { cursor: pointer; color: var(--accent); font-weight: 600; padding-block: 8px; }
details .publication-list { margin-top: 20px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px; }
.feature-card { padding: 0; }
.feature-card p { color: var(--muted); font-size: .95rem; }
.feature-card .card-link { font-size: .88rem; font-weight: 650; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 120px 1fr; gap: 28px; padding: 22px 0; border-top: 1px solid var(--line); }
.timeline li:first-child { border-top: 0; padding-top: 0; }
.date { color: var(--muted); font-size: .86rem; }
.timeline h3 { font-size: 1.05rem; margin-bottom: 5px; }
.timeline p { color: var(--muted); margin: 0; font-size: .94rem; }
.role { color: var(--accent) !important; margin-bottom: 9px !important; font-weight: 550; }
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 35px; }
.about-grid p { color: var(--muted); }
.skills { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0 0 25px; }
.skills li { padding: 0; font-size: .85rem; }
.skills li:not(:last-child)::after { content: ","; }
.small { font-size: .88rem; color: var(--muted); }
.news-list { list-style: none; margin: 0; padding: 0; }
.news-list li { display: grid; grid-template-columns: 60px 1fr; gap: 18px; margin-bottom: 12px; font-size: .94rem; }
.news-list strong { color: var(--teal); }
.site-footer { padding: 28px 0; background: var(--surface); border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: .82rem; color: var(--muted); }
.footer-links { display: flex; gap: 20px; }
.flag-counter { margin-top: 18px; font-size: .8rem; }
.page-intro { padding-block: 40px; }
.page-intro h1 { font-size: 2rem; }
.page-intro p:last-child { margin-bottom: 0; max-width: 650px; color: var(--muted); }
.project-jump { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 25px; font-size: .86rem; }
.project-card { padding: 0 0 34px; margin-bottom: 34px; border-bottom: 1px solid var(--line); scroll-margin-top: 24px; }
.project-card:last-child { border-bottom: 0; margin-bottom: 0; }
.project-card h2 { font-size: 1.35rem; margin-bottom: 12px; }
.project-subtitle { color: var(--muted); margin-bottom: 18px; font-size: 1.05rem; }
.project-card p:not(.project-subtitle) { max-width: 760px; }
.project-card ul { padding-left: 21px; }
.project-card li { padding-left: 3px; margin-bottom: 7px; }
.project-image { width: 100%; max-width: 760px; display: block; margin: 25px auto; border: 1px solid var(--line); border-radius: 3px; }
.project-links { display: flex; flex-wrap: wrap; gap: 24px; margin-block: 18px; }
.project-result { padding: 18px 22px; background: var(--soft); border-left: 3px solid var(--accent); border-radius: 0; }
.project-result strong { color: var(--accent); }
.project-demo { margin-block: 25px; }
.project-demo .project-image { margin-block: 0 12px; }
.animation-toggle { color: var(--accent); background: none; border: 0; padding: 6px 0; cursor: pointer; font-size: .9rem; text-decoration: underline; text-underline-offset: 4px; }
.animation-toggle:hover { color: var(--accent-hover); }
.animation-status { display: block; color: var(--muted); font-size: .85rem; }
@media (min-width: 761px) and (max-width: 940px) {
  .header-inner { flex-wrap: wrap; padding-top: 14px; gap: 0; }
  .brand { flex: 1; }
  .header-controls { order: 1; }
  .nav { order: 2; width: 100%; flex-wrap: wrap; }
}
@media (max-width: 760px) {
  .container { width: calc(100% - 40px); }
  .header-inner { flex-wrap: wrap; gap: 0; padding-block: 15px 8px; }
  .brand { flex: 1; font-size: 1.3rem; }
  .header-controls { order: 1; }
  .nav { order: 2; width: 100%; gap: 10px 18px; flex-wrap: wrap; padding-top: 6px; }
  .nav a { font-size: .82rem; white-space: nowrap; }
  .hero-inner { grid-template-columns: 160px minmax(0, 1fr); gap: 26px; padding-block: 30px; }
  .profile-pic { width: 160px; height: auto; aspect-ratio: 5/6; align-self: start; }
  .hero-description { font-size: 1rem; }
  main.container > section { padding-block: 36px; }
  .feature-grid,.about-grid { grid-template-columns: 1fr; gap: 22px; }
  .timeline li { grid-template-columns: 1fr; gap: 6px; }
  .section-heading { flex-wrap: wrap; gap: 10px; }
  .project-card { padding: 0 0 28px; }
  .page-intro { padding-block: 36px; }
}
@media (max-width: 560px) {
  .hero-inner { grid-template-columns: 1fr; gap: 24px; }
  .profile-pic { width: 150px; justify-self: center; }
  .hero-meta { margin-bottom: 14px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }