/* ---------------------------------------------------------------
   Assaf Singer — personal academic site
   Minimal academic style, Technion-navy accent, responsive.
   --------------------------------------------------------------- */

:root {
  --accent: #1f3a68;
  --accent-hover: #2d5393;
  --text: #1a1a1a;
  --muted: #5a5a5a;
  --faint: #8a8a8a;
  --rule: #e6e6e6;
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --max-width: 860px;
  --radius: 4px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 28px 64px;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
a:hover {
  color: var(--accent-hover);
  border-bottom-color: var(--accent-hover);
}

h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 1.9rem; margin: 0 0 4px; line-height: 1.2; }
h2 {
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 48px 0 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}
h3 { font-size: 1.05rem; margin: 0 0 4px; }

p { margin: 0 0 12px; }

/* ------------------- Header / Hero ------------------- */
header.hero {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 28px;
  align-items: center;
}
header.hero img.portrait {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow);
}
header.hero .tagline {
  color: var(--muted);
  margin: 6px 0 14px;
  font-size: 1.02rem;
}
header.hero .links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}
header.hero .links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: var(--muted);
  border: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  border-radius: 50%;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}
header.hero .links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: rgba(31, 58, 104, 0.06);
}
header.hero .links svg {
  width: 18px;
  height: 18px;
  display: block;
}
@media (prefers-color-scheme: dark) {
  header.hero .links a:hover { background-color: rgba(142, 184, 242, 0.1); }
}

/* ------------------- Research interests ------------------- */
.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.interests li {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  color: var(--muted);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
}

/* ------------------- News ------------------- */
.news {
  list-style: none;
  padding: 0;
  margin: 0;
}
.news li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--rule);
  font-size: 0.97rem;
}
.news li:last-child { border-bottom: 0; }
.news time { color: var(--faint); font-variant-numeric: tabular-nums; }

/* ------------------- Publications ------------------- */
.pub {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 22px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}
.pub:last-child { border-bottom: 0; }
.pub .thumb {
  width: 200px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-soft);
  border: 1px solid var(--rule);
}
.pub .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.pub .thumb-contain {
  padding: 6px;
  background: #fff;
}
.pub .thumb-contain img {
  object-fit: contain;
}
@media (prefers-color-scheme: dark) {
  .pub .thumb-contain { background: #f5f5f5; }
}
.pub .authors { color: var(--muted); font-size: 0.95rem; margin: 2px 0 4px; }
.pub .authors .me { color: var(--text); font-weight: 600; }
.pub .venue {
  color: var(--faint);
  font-size: 0.9rem;
  font-style: italic;
  margin: 0 0 10px;
}
.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  font-size: 0.88rem;
}
.pub-links a {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--muted);
}
.pub-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Earlier-work sub-section gets lighter treatment */
.earlier-heading {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--faint);
  margin: 28px 0 4px;
}

/* ------------------- Talks ------------------- */
.talk {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 22px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.talk:last-child { border-bottom: 0; }

.talk-thumb {
  display: block;
  width: 200px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  /* override the default underlined-link style for thumbnail anchors */
  border-bottom: 1px solid var(--rule);
}
.talk-thumb:hover { border-color: var(--accent); }
.talk-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.talk-body p { margin: 0 0 6px; }
.talk-body .talk-meta {
  color: var(--faint);
  font-size: 0.88rem;
  letter-spacing: 0.02em;
}
.talk-body .pub-links { margin-top: 6px; }

@media (max-width: 640px) {
  .talk { grid-template-columns: 1fr; }
  .talk-thumb { width: 100%; aspect-ratio: 16 / 9; }
}

/* ------------------- Teaching (simple list) ------------------- */
.simple-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.simple-list li {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--rule);
  font-size: 0.97rem;
}
.simple-list li:last-child { border-bottom: 0; }
.simple-list .when { color: var(--faint); font-variant-numeric: tabular-nums; }

/* ------------------- Footer ------------------- */
footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  color: var(--faint);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ------------------- Responsive ------------------- */
@media (max-width: 640px) {
  main { padding: 28px 20px 40px; }
  header.hero {
    grid-template-columns: 1fr;
    text-align: left;
    gap: 18px;
  }
  header.hero img.portrait { width: 120px; height: 120px; }
  h1 { font-size: 1.6rem; }

  .pub {
    grid-template-columns: 1fr;
  }
  .pub .thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .news li,
  .simple-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .news time,
  .simple-list .when { font-size: 0.85rem; }
}

/* ------------------- Dark-mode (system-aware) ------------------- */
@media (prefers-color-scheme: dark) {
  :root {
    --accent: #8eb8f2;
    --accent-hover: #b3cdf5;
    --text: #e8e8e8;
    --muted: #b0b0b0;
    --faint: #7a7a7a;
    --rule: #2a2a2a;
    --bg: #141414;
    --bg-soft: #1c1c1c;
  }
  header.hero img.portrait { box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4); }
}