/* Daria Trotsenko — personal site */

:root {
  --bg: #ffffff;
  --text: #222222;
  --text-soft: #555555;
  --text-muted: #666666;
  --text-faint: #888888;
  --rule: #dddddd;
  --rule-light: #e6e6e6;
  --link: #8a1c2b;
  --link-hover: #5a0f1a;
  --band: #f4f3f0;
  --land: #e6e3dc;
  --land-edge: #cfcbc2;
}

html { font-size: 17px; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, "Times New Roman", Times, serif;
  line-height: 1.6;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header and navigation */
header {
  border-bottom: 1px solid var(--rule);
  padding: 28px 0 14px;
  margin-bottom: 36px;
}

header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
}

header .site-name {
  font-size: 1.35rem;
  font-weight: normal;
  margin: 0;
  letter-spacing: 0.01em;
}

header .site-name a {
  color: var(--text);
  text-decoration: none;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
}

nav a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.95rem;
}

nav a:hover,
nav a.current {
  color: var(--text);
  border-bottom: 1px solid var(--text);
}

/* Main text */
main { padding-bottom: 48px; }

h1 {
  font-size: 1.9rem;
  font-weight: normal;
  margin: 0 0 6px;
  line-height: 1.25;
}

h2 {
  font-size: 1.3rem;
  font-weight: normal;
  margin: 40px 0 10px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--rule-light);
}

h3 {
  font-size: 1.05rem;
  font-weight: bold;
  margin: 26px 0 4px;
}

p { margin: 0 0 1em; }

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

.subtitle {
  color: var(--text-soft);
  margin: 0 0 24px;
  font-size: 1.05rem;
}

.muted { color: var(--text-muted); }

small, .small { font-size: 0.9rem; }

/* Home page layout: photo beside text */
.intro {
  display: flex;
  gap: 36px;
  align-items: flex-start;
}

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

.intro img {
  width: 220px;
  height: auto;
  flex: 0 0 auto;
  display: block;
}

/* Lists (talks, service, publications) */
ul.plain {
  list-style: none;
  padding: 0;
  margin: 0;
}

ul.plain li { margin: 0 0 14px; }

.date {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.venue { color: var(--text-soft); }

/* Entries: date column on the left on wide screens */
.entry {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0 18px;
  margin-bottom: 18px;
}

.entry .date { padding-top: 3px; }

.entry .title { margin: 0; }

.entry .details { margin: 2px 0 0; color: var(--text-soft); }

.entry .links { margin: 2px 0 0; font-size: 0.92rem; }

/* Talk entries with a title-slide thumbnail */
.entry.talk {
  grid-template-columns: 110px 1fr 150px;
  align-items: start;
  margin-bottom: 26px;
}

.entry.talk .thumb img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--rule);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.entry.talk .thumb:hover img {
  transform: scale(1.03);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}

/* Photos with captions */
figure.photo {
  margin: 28px auto;
}

figure.photo img,
figure.photo video {
  width: 100%;
  height: auto;
  display: block;
}

figure.photo img {
  transition: transform 0.4s ease;
}

figure.photo:hover > img,
.photo-row figure.photo:hover img {
  transform: scale(1.015);
}

figure.photo video { background: #000; }

figure.photo.centered { margin-left: auto; margin-right: auto; }
figure.photo.narrow { max-width: 440px; }
figure.photo.medium { max-width: 620px; }
figure.photo.portrait { max-width: 360px; }
.photo-row.figures { max-width: 640px; }
.photo-row.neutron { max-width: none; align-items: flex-start; }

/* Three images on one line sharing a caption */
.row3 {
  display: flex;
  align-items: center;
  gap: 16px;
}

figure.photo .row3 img {
  flex: 1 1 0;
  min-width: 0;
  width: 33%;
  height: auto;
}

@media (max-width: 600px) {
  .row3 { flex-wrap: wrap; justify-content: center; }
  figure.photo .row3 img { width: 47%; flex: 0 0 47%; }
}

/* Two photos of different shapes shown at equal height:
   each figure's flex-grow is set inline to its width/height ratio */
.photo-row.match { align-items: flex-start; }
.photo-row.match figure.photo { flex: 1 1 0; }

/* Four small captioned photos in a strip */
.photo-row.cities {
  gap: 12px;
  margin: 24px auto 32px;
}

.photo-row.cities figcaption {
  text-align: center;
  margin-top: 4px;
}

@media (max-width: 600px) {
  .photo-row.cities { flex-direction: row; flex-wrap: wrap; }
  .photo-row.cities figure.photo { flex: 0 0 48%; max-width: 48%; }
}

figure.photo figcaption,
figure.photo .cap {
  margin: 6px 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.45;
  text-align: center;
}

.photo-row {
  display: flex;
  gap: 20px;
  margin: 36px auto 8px;
}

.photo-row figure.photo {
  flex: 1 1 0;
  min-width: 0;
  margin: 0;
}

.photo-row figure.photo figcaption { text-align: center; }

@media (max-width: 600px) {
  .photo-row { flex-direction: column; gap: 24px; }
}

/* Before/after comparison with a two-way switch (no JavaScript) */
figure.compare input { position: absolute; opacity: 0; pointer-events: none; }

figure.compare .compare-frame {
  position: relative;
  overflow: hidden;
}

figure.compare .compare-frame img { transition: opacity 0.5s ease, transform 0.4s ease; }

figure.compare .compare-frame .img-b {
  position: absolute;
  inset: 0;
  opacity: 0;
}

figure.compare #sv-qcd:checked ~ .compare-frame .img-b { opacity: 1; }

figure.compare .compare-switch {
  display: flex;
  gap: 6px;
  margin-top: 10px;
}

figure.compare .compare-switch label {
  flex: 1 1 0;
  text-align: center;
  font-size: 0.85rem;
  padding: 4px 8px;
  border: 1px solid var(--rule);
  color: var(--text-soft);
  cursor: pointer;
  user-select: none;
}

figure.compare .compare-switch label:hover { color: var(--text); }

figure.compare #sv-trad:checked ~ .compare-switch label[for="sv-trad"],
figure.compare #sv-qcd:checked ~ .compare-switch label[for="sv-qcd"] {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

figure.compare .cap-b { display: none; }
figure.compare #sv-qcd:checked ~ .cap-a { display: none; }
figure.compare #sv-qcd:checked ~ .cap-b { display: block; }

figure.compare .credit {
  font-size: 0.78rem;
  color: var(--text-faint);
  margin-top: 2px;
}

/* Route map on the About page */
.map-wrap {
  margin: 8px 0 20px;
}

.route-map {
  width: 100%;
  height: auto;
  display: block;
}

.route-map .land { fill: var(--land); stroke: var(--land-edge); stroke-width: 0.6; }
.route-map .route { fill: none; stroke: var(--link); stroke-width: 1.6; stroke-dasharray: 5 4; }
.route-map .dot { fill: var(--link); }
.route-map .lbl { font-family: Georgia, serif; font-size: 15px; fill: var(--text); }

/* Footer / contact banner */
footer {
  background: var(--band);
  border-top: 1px solid var(--rule);
  padding: 28px 0 32px;
  color: var(--text-soft);
  font-size: 0.95rem;
  margin-top: 24px;
}

footer p { margin: 0 0 6px; }

footer .footer-title {
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 8px;
}

footer .footer-links a { color: var(--link); }

footer .sep { margin: 0 10px; color: var(--text-faint); }

footer .footer-address { color: var(--text-muted); }

footer .footer-updated {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-faint);
}

/* Small screens */
@media (max-width: 600px) {
  html { font-size: 16px; }
  header { padding-top: 20px; margin-bottom: 24px; }
  .intro { flex-direction: column-reverse; gap: 20px; }
  .intro img { width: 180px; }
  .entry { grid-template-columns: 1fr; }
  .entry.talk { grid-template-columns: 1fr; }
  .entry.talk .thumb { max-width: 220px; margin-top: 8px; }
  .entry .date { margin-bottom: 2px; }
}

/* Print */
@media print {
  html { font-size: 11pt; }
  body { background: #fff; color: #000; }
  header nav, footer .footer-updated, figure.compare .compare-switch, .map-wrap { display: none; }
  header { border-bottom: 1px solid #000; margin-bottom: 18pt; }
  a { color: #000; text-decoration: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 0.85em; color: #444; }
  footer { background: none; border-top: 1px solid #000; color: #000; }
  figure.photo, .photo-row, video { break-inside: avoid; }
  video { display: none; }
}