/* Ivan Shaliastovich — clean, open academic website */

:root{
  --bg: #ffffff;
  --text: #1f1f1f;
  --muted: #666666;
  --rule: #dddddd;
  --soft-rule: #eeeeee;
  --link: #0645ad;
  --maxw: 900px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;
}

*{ box-sizing: border-box; }
html{
  scroll-behavior: smooth;
  overflow-y: scroll;
  scrollbar-gutter: stable;
}
@media (prefers-reduced-motion: reduce){ html{ scroll-behavior: auto; } }

body{
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

a{
  color: var(--link);
  text-decoration: none;
}
a:hover,
a:focus{
  text-decoration: underline;
  text-underline-offset: 2px;
}
a:focus{
  outline: 2px solid #b7cdf6;
  outline-offset: 2px;
}

img{
  max-width: 100%;
  height: auto;
  display: block;
}

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.skip-link{
  position: absolute;
  top: -40px;
  left: 16px;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--rule);
  padding: 6px 10px;
  z-index: 999;
}
.skip-link:focus{ top: 12px; }

/* Keep page titles available to screen readers without displaying redundant headings. */
.visually-hidden{
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.visually-hidden + section > h2:first-child{ margin-top: 0; }

/* Header */
.site-header{
  background: #fff;
  border-bottom: 1px solid var(--soft-rule);
}
.header-inner{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 28px;
  padding: 28px 0 18px;
}
.brand a{
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 400;
}
.brand-subtitle{ display: none; }

.site-nav{ position: relative; }
.nav-toggle{
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border: 1px solid var(--rule);
  border-radius: 0;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
}
.nav-menu{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 16px;
  align-items: center;
}
.nav-menu a{
  color: var(--text);
  padding: 0;
}
.nav-menu a[aria-current="page"]{
  font-weight: 600;
}

.js .nav-menu{
  display: none;
  position: absolute;
  right: 0;
  top: 40px;
  min-width: 190px;
  padding: 12px 14px;
  background: #fff;
  border: 1px solid var(--rule);
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  z-index: 50;
}
.js .site-nav.open .nav-menu{ display: flex; }

@media (min-width: 720px){
  .nav-toggle{ display: none; }
  .js .nav-menu{
    position: static;
    display: flex !important;
    flex-direction: row;
    border: 0;
    padding: 0;
    min-width: 0;
    background: transparent;
  }
}

/* Typography */
main.container{
  padding-top: 48px;
  padding-bottom: 26px;
}

/* Inner pages start with smaller text than the Welcome heading. Give them
   extra optical breathing room below the header rule. */
main.container:not(.home){
  padding-top: 76px;
}
h1, h2, h3{
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.25;
  margin: 0 0 12px;
  color: #111;
}
h1{
  font-size: clamp(2rem, 4vw, 2.7rem);
  margin-bottom: 14px;
}
h2{
  font-size: 1.35rem;
  margin-top: 36px;
  padding-top: 0;
}
h3{
  font-size: 1.08rem;
  margin-top: 24px;
}
p{ margin: 0 0 1rem; }
.lead{
  color: var(--muted);
  font-size: 1.02rem;
  margin-bottom: 1.15rem;
}
.muted{ color: var(--muted); }

/* Home */
.home{ padding-top: 48px; }
.home-layout{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 38px;
  align-items: start;
}
@media (min-width: 760px){
  .home-layout{
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 70px;
  }
}
.home-main{ max-width: 560px; }
.home-links{
  margin: 20px 0 34px;
}
.home-contact{
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--soft-rule);
}
.home-contact h2,
.research-glance h2{
  margin-top: 0;
  font-size: 1.2rem;
}
.hero-photo img,
.home-aside img{
  width: 100%;
  max-width: 280px;
  border: 0;
  box-shadow: none;
  border-radius: 0;
}
.research-glance{
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--soft-rule);
  color: var(--text);
}
.research-glance p{ font-size: .97rem; }

/* General components retained for compatibility */
.hero{ padding: 0; }
.hero-grid{
  display: grid;
  gap: 36px;
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 760px){ .hero-grid{ grid-template-columns: minmax(0, 1fr) 280px; gap: 70px; } }
.grid-2{
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  margin: 28px 0;
}
@media (min-width: 760px){ .grid-2{ grid-template-columns: 1fr 1fr; } }
.card{
  background: transparent;
  border: 0;
  padding: 0;
}
.card h2{ margin-top: 0; }
.button{
  display: inline;
  background: transparent;
  color: var(--link) !important;
  border: 0;
  padding: 0;
  border-radius: 0;
  font-weight: 400;
}
.button::after{ content: ""; }
.button:hover{ filter: none; }
.cta-row{
  display: block;
  margin-top: 18px;
}
.cta-row .button + .button::before{ content: " · "; color: var(--muted); }

.contact-list{
  list-style: none;
  padding: 0;
  margin: 0;
}
.contact-list li{ margin: 4px 0; }
.contact-list span{ color: var(--muted); margin-right: 6px; }

/* Research */
.pub-list{
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
}
.paper{
  margin: 0 0 1rem;
  padding: 0;
  border: 0;
  background: transparent;
}
.paper-main{ font-size: 1rem; }
.paper-links{
  list-style: circle;
  padding-left: 1.35rem;
  margin: .3rem 0 0;
  color: var(--muted);
}
.paper-links li{
  display: list-item;
  margin: .1rem 0;
  padding: 0;
  color: var(--muted);
  font-size: .94rem;
}
.paper-links li::marker{
  font-size: .75em;
}

/* Teaching */
.syllabi-block{
  border-left: 0;
  padding-left: 0;
  margin: 20px 0 28px;
}
.syllabi-list{
  margin: 6px 0 0;
  padding-left: 1.25rem;
}

/* Footer */
.site-footer{
  margin-top: 34px;
  padding: 24px 0 34px;
  border-top: 1px solid var(--soft-rule);
  color: var(--muted);
  font-size: .92rem;
}
.footer-line,
.footer-meta{
  margin: 4px 0;
}
.footer-meta{ color: var(--muted); }
.footer-grid{ display: block; }

@media (max-width: 719px){
  .header-inner{
    align-items: flex-start;
    padding: 22px 0 16px;
  }
  .home{ padding-top: 34px; }
  main.container{ padding-top: 34px; }
  main.container:not(.home){ padding-top: 54px; }
}

@media print{
  .site-header, .site-footer, .nav-toggle, .skip-link{ display: none !important; }
  body{ color: #000; background: #fff; }
  a{ color: #000; text-decoration: underline; }
}