:root {
  --font-family: "Inter", Arial, sans-serif;
  --text-color: #111;
  --background-color: #fff;
  --link-color: #0645ad;
  --muted-color: #666;
  --rule-color: #999;
  --page-width: 800px;
  --page-side-padding: 24px;
  --photo-size: 170px;
  --photo-size-mobile: 220px;
  --photo-border-color: #ccc;
  --section-gap: 2rem;
  --intro-gap: 2rem;
  --icon-gap: 0.22rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #e8e8e8;
    --background-color: #121212;
    --link-color: #7fb3ff;
    --muted-color: #aaaaaa;
    --rule-color: #555;
    --photo-border-color: #666;
  }
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  color: var(--text-color);
  font-size: 16px;
  line-height: 1.7;
  background: var(--background-color);
  margin: 0;
  padding: 0;
}

a,
a:visited,
a:active,
a:hover {
  color: var(--link-color);
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  max-width: var(--page-width);
  margin: 40px auto;
  padding: 0 var(--page-side-padding);
}

h1,
h2 {
  font-weight: 550;
  margin-top: 0;
  letter-spacing: 0.06em;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 0;
  text-align: center;
}

h2 {
  font-size: 1.8rem;
  margin: 0.2rem 0;
}

h3 {
  font-size: 1.4rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
  font-weight: 570;
}

hr {
  border: none;
  border-top: 1px solid var(--rule-color);
  margin: 0.4rem 0;
}

nav {
  font-size: 1rem;
  text-align: center;
}

details {
  margin: 1rem 0;
}

details summary {
  cursor: pointer;
  color: var(--link-color);
  font-weight: 500;
}

details summary:hover {
  text-decoration: underline;
}

details summary:focus {
  outline: 2px solid var(--link-color);
  outline-offset: 2px;
}

details[open] summary {
  margin-bottom: 0.75rem;
}

details > *:not(summary) {
  margin-top: 0.75rem;
}

.sep {
  color: var(--muted-color);
  margin: 0 0.35rem;
}

.useful-links {
  margin-top: 1rem;
  text-align: center;
}

.useful-links i {
  margin-right: var(--icon-gap);
  vertical-align: -0.08em;
}

.inline-icon {
  display: inline-block;
  width: 0.9em;
  height: 0.9em;
  vertical-align: -0.08em;
  margin-right: var(--icon-gap);
}

.inline-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.inline-icon-msu {
  display: inline-block;
  width: 100%;
  height: 100%;
  background-color: currentColor;
  -webkit-mask: url("images/msu.svg") center / contain no-repeat;
  mask: url("images/msu.svg") center / contain no-repeat;
}

.section {
  margin-top: var(--section-gap);
}

.section > hr + h2 + hr + .prose {
  margin-top: 1.5rem;
} 

.prose p,
.intro-text p,
.media-text p {
  margin-top: 0;
  margin-bottom: 1rem;
  text-align: justify;
}

.prose p:last-child,
.intro-text p:last-child,
.media-text p:last-child {
  margin-bottom: 0;
}

.intro,
.media-right,
.media-left {
  display: flex;
  gap: var(--intro-gap);
  align-items: flex-start;
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

.media-left {
  flex-direction: row-reverse;
}

.intro-text,
.media-text {
  flex: 1;
  min-width: 0;
}

.photo,
.media-figure {
  width: var(--photo-size);
  flex-shrink: 0;
}

.photo img,
.media-figure img {
  width: var(--photo-size);
  height: var(--photo-size);
  object-fit: cover;
  display: block;
  border: none;
  border-radius: 50%;
}

.media-figure figcaption {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--text-color);
  text-align: center;
}

.media-figure.square img,
.media-figure.rect img {
  border-radius: 0;
}

.media-figure.rect img {
  width: 100%;
  height: auto;
}

.prose ol,
.prose ul,
#papers ol,
#papers ul {
  padding-left: 1.6rem;
}

.prose li,
#papers li {
  margin-bottom: 1rem;
}

.prose details {
  margin: 0 0 1rem 0;
  padding-left: 1.6rem;
}

.prose details:last-child {
  margin-bottom: 0;
}

.prose details summary {
  display: list-item;
  list-style-position: outside;
  cursor: pointer;
  color: var(--link-color);
}

.prose details[open] > *:not(summary) {
  margin-top: 0.75rem;
}

.spacer-sm { height: 0.7rem; }
.spacer-md { height: 1rem; }
.spacer-lg { height: 2rem; }

@media (max-width: 700px) {
  .intro,
  .media-right,
  .media-left {
    flex-direction: column-reverse;
    align-items: center;
  }

  .photo,
  .media-figure {
    width: var(--photo-size-mobile);
    margin: 0 auto;
  }

  .photo img,
  .media-figure img {
    width: var(--photo-size-mobile);
    height: var(--photo-size-mobile);
  }

  .media-figure.rect img {
    width: 100%;
    height: auto;
  }
}