/* Nazanin Khazra — site styles */
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;1,8..60,400&family=Inter:wght@400;500;600&display=swap');

:root {
  --ink: #1a1a1a;
  --muted: #666;
  --rule: #e0e0e0;
  --accent: #7a1f2b;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: Inter, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 55, 101, 0.25);
}
a:hover { border-bottom-color: var(--accent); }

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  border-bottom: 1px solid var(--rule);
}
.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 26px 24px 22px;
  flex-wrap: wrap;
  gap: 12px 32px;
}
.brand {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.005em;
  color: var(--ink);
  border: 0;
}
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 26px;
}
nav a {
  color: var(--muted);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 0;
  padding-bottom: 2px;
}
nav a:hover, nav a.active { color: var(--ink); }
nav a.active { color: var(--ink); border-bottom: 1.5px solid var(--accent); }

/* Content */
main.wrap { padding: 52px 24px 96px; }

h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 38px;
  line-height: 1.15;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.3;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}
h2::before { content: ""; display: block; width: 36px; border-top: 2px solid var(--accent); margin-bottom: 12px; }
h2:first-child { margin-top: 0; }
h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 16px;
  margin: 28px 0 8px;
}
p { margin: 0 0 16px; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin: 6px 0; }
.muted { color: var(--muted); }
.small { font-size: 14.5px; }
em { font-style: italic; }

/* Home */
.intro {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  align-items: start;
}
.intro img, .intro .photo {
  width: 200px;
  height: 250px;
  object-fit: cover;
  display: block;
  background: #f0f0f0;
}
.intro .photo {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 13px;
  text-align: center;
  padding: 12px;
}
.title-line {
  color: var(--muted);
  font-size: 16px;
  margin: 0 0 22px;
}
.intro h1::after { content: ""; display: block; width: 36px; border-top: 2px solid var(--accent); margin: 14px 0 12px; }
.contact {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: 14.5px;
  color: var(--muted);
}
.contact a, .contact span { margin-right: 18px; }

/* Lists of papers / courses */
.item { margin: 0 0 26px; }
.item .t {
  font-family: var(--serif);
  font-size: 18.5px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 3px;
}
.item .t a { border-bottom-color: transparent; }
.item .t a:hover { border-bottom-color: var(--accent); }
.item .meta {
  color: var(--muted);
  font-size: 14.5px;
  margin: 0 0 6px;
}
.item .desc { margin: 0; }
.item .links { font-size: 14px; margin-top: 4px; }
.item .links a { margin-right: 14px; }

/* Definition-style rows */
.row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}
.row:last-child { border-bottom: 0; }
.row .k { color: var(--muted); font-size: 14.5px; padding-top: 2px; }

/* Student comments */
.quotes { list-style: none; margin: 0 0 8px; padding: 0; }
.quote { margin: 0 0 22px; padding: 2px 0 2px 18px; border-left: 2px solid var(--accent); }
.quote p { font-family: var(--serif); font-size: 17.5px; line-height: 1.55; margin: 0 0 6px; }
.quote .who { color: var(--muted); font-size: 14px; }

/* News list */
.news { list-style: none; margin: 0 0 16px; padding: 0; }
.news li { margin: 0 0 10px; }
.news .src { display: block; color: var(--muted); font-size: 14px; }

/* Materials rows: course on the left, link list on the right */
.row .links a { margin-right: 2px; }
.row .links .sep { color: var(--muted); margin: 0 6px; }
.row .sub { color: var(--muted); font-size: 14.5px; }

/* Preformatted text (prompts, code) */
pre {
  background: #f7f7f7;
  border: 1px solid var(--rule);
  padding: 16px 18px;
  overflow: auto;
  font-size: 14px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* Placeholder marker */
.placeholder {
  display: inline-block;
  border: 1px dashed var(--accent);
  color: var(--accent);
  padding: 1px 10px;
  font-size: 14px;
}

footer {
  border-top: 1px solid var(--rule);
  padding: 20px 0 40px;
  color: var(--muted);
  font-size: 13.5px;
}

@media (max-width: 640px) {
  .intro { grid-template-columns: 1fr; gap: 24px; }
  .intro img, .intro .photo { width: 160px; height: 200px; }
  h1 { font-size: 32px; }
  .row { grid-template-columns: 1fr; gap: 2px; }
  nav ul { gap: 4px 18px; flex-wrap: wrap; }
  .header-inner { padding: 20px 24px 16px; gap: 8px 32px; }
}