/* ------------------------------------------------------------------
   Shahram Rahimi — personal academic site
   Palette: paper #F6F5F2 · ink #201D1A · crimson #9E1B32 · slate #5C5853
------------------------------------------------------------------- */

:root {
  --paper: #f6f5f2;
  --paper-deep: #edebe6;
  --ink: #201d1a;
  --ink-soft: #37332e;
  --slate: #5c5853;
  --crimson: #9e1b32;
  --crimson-dark: #7c1527;
  --hairline: #d8d4cc;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Public Sans", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --measure: 66ch;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--crimson); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--crimson);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 1.5rem; }

/* ---------- Navigation ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.site-nav .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}
.nav-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  white-space: nowrap;
}
.nav-name:hover { text-decoration: none; color: var(--crimson); }
.nav-links { display: flex; flex-wrap: wrap; gap: 1.1rem; list-style: none; }
.nav-links a { color: var(--ink-soft); font-size: 0.92rem; }
.nav-links a:hover { color: var(--crimson); text-decoration: none; }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}
.hero-graph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
  pointer-events: none;
}
.hero .wrap {
  position: relative;
  padding-top: 5.5rem;
  padding-bottom: 5rem;
}
.hero-kicker {
  font-size: 0.95rem;
  color: #c9c3ba;
  margin-bottom: 1.1rem;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  max-width: 14ch;
}
.hero h1 .degree {
  font-size: 0.42em;
  font-weight: 400;
  color: #b5aea4;
  letter-spacing: 0;
  white-space: nowrap;
}
.hero-role {
  margin-top: 1.4rem;
  max-width: 44ch;
  font-size: 1.12rem;
  line-height: 1.55;
  color: #e8e4dd;
}
.hero-role strong { color: #fff; font-weight: 600; }
.hero-actions { margin-top: 2.2rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }
.btn {
  display: inline-block;
  padding: 0.7rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 3px;
  border: 1px solid transparent;
}
.btn-crimson { background: var(--crimson); color: #fff; }
.btn-crimson:hover { background: var(--crimson-dark); text-decoration: none; }
.btn-ghost { border-color: #6b665f; color: #efece6; }
.btn-ghost:hover { border-color: #efece6; text-decoration: none; }

/* Fact band under hero */
.fact-band { border-bottom: 1px solid var(--hairline); background: var(--paper-deep); }
.fact-band .wrap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0;
}
.fact {
  padding: 1.35rem 1.4rem 1.35rem 0;
  border-left: 1px solid var(--hairline);
  padding-left: 1.4rem;
}
.fact:first-child { border-left: none; padding-left: 0; }
.fact b {
  display: block;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.2;
}
.fact span { font-size: 0.88rem; color: var(--slate); }

/* ---------- Sections ---------- */

section { padding: 4.2rem 0 1rem; }
section:last-of-type { padding-bottom: 4rem; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.8rem;
}
.section-head h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.75rem;
  letter-spacing: -0.01em;
}
.section-head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--hairline);
  transform: translateY(-0.35em);
}

.prose { max-width: var(--measure); }
.prose p + p { margin-top: 1rem; }

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 3rem;
  align-items: start;
}

/* Portrait / monogram */
.portrait {
  border: 1px solid var(--hairline);
  background: var(--paper-deep);
  aspect-ratio: 4 / 5;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.portrait img { width: 100%; height: 100%; object-fit: cover; display: block; }
.portrait .monogram {
  font-family: var(--serif);
  font-size: 5rem;
  font-weight: 560;
  color: var(--crimson);
}
.portrait-caption { margin-top: 0.6rem; font-size: 0.85rem; color: var(--slate); }

.edu-list { margin-top: 1.6rem; }
.edu-list h3, .aside-block h3 {
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}
.edu-list ul { list-style: none; }
.edu-list li {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 0.93rem;
  color: var(--ink-soft);
}
.edu-list li:last-child { border-bottom: none; }
.edu-list li em { color: var(--slate); font-style: normal; }

/* ---------- Research ---------- */

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}
.research-cell { background: var(--paper); padding: 1.5rem 1.4rem 1.6rem; }
.research-cell h3 {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 600;
  margin-bottom: 0.55rem;
}
.research-cell p { font-size: 0.94rem; color: var(--ink-soft); }

.themes { margin-top: 2rem; max-width: var(--measure); }
.themes h3 { font-family: var(--serif); font-size: 1.12rem; font-weight: 600; margin-bottom: 0.7rem; }
.theme-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; }
.theme-tags li {
  font-size: 0.88rem;
  color: var(--ink-soft);
  border: 1px solid var(--hairline);
  background: var(--paper-deep);
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
}

/* ---------- Publications ---------- */

.pub-list { list-style: none; max-width: 78ch; }
.pub-list li {
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--hairline);
}
.pub-list li:first-child { border-top: 1px solid var(--hairline); }
.pub-title { font-weight: 600; color: var(--ink); }
.pub-meta { display: block; font-size: 0.9rem; color: var(--slate); margin-top: 0.15rem; }
.pub-meta i { font-style: italic; }
.pub-more { margin-top: 1.5rem; }

/* Scholar metrics */
.scholar-panel {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 2.2rem;
  align-items: flex-end;
}
.scholar-metric b {
  display: block;
  font-family: var(--serif);
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1.1;
  color: #fff;
}
.scholar-metric span { font-size: 0.88rem; color: #b5aea4; }
.scholar-metric em { font-style: normal; font-size: 0.82rem; color: #8f897f; display: block; }
.scholar-note { width: 100%; font-size: 0.85rem; color: #8f897f; margin-top: 0.4rem; }
.scholar-note a { color: #e8b7c0; }

.pub-list .cites {
  display: inline-block;
  margin-top: 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--crimson);
}
.pub-list .cites a { color: var(--crimson); }

/* Full publications page */
.page-head { background: var(--ink); color: var(--paper); }
.page-head .wrap { padding-top: 3.2rem; padding-bottom: 2.8rem; }
.page-head h1 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.01em;
}
.page-head p { margin-top: 0.7rem; color: #c9c3ba; max-width: 58ch; }
.year-group { padding: 2.4rem 0 0.4rem; }
.year-group h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--crimson);
  margin-bottom: 0.8rem;
}
.year-nav { padding: 1.4rem 0 0.2rem; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.year-nav a {
  font-size: 0.88rem;
  border: 1px solid var(--hairline);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  color: var(--ink-soft);
}
.year-nav a:hover { border-color: var(--crimson); color: var(--crimson); text-decoration: none; }

/* ---------- Lab & tools ---------- */

.lab-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 1.5rem; }
.lab-card {
  border: 1px solid var(--hairline);
  border-top: 3px solid var(--crimson);
  padding: 1.6rem 1.5rem 1.7rem;
  background: var(--paper);
}
.lab-card h3 { font-family: var(--serif); font-size: 1.3rem; font-weight: 600; }
.lab-card .lab-sub { font-size: 0.9rem; color: var(--slate); margin: 0.2rem 0 0.8rem; }
.lab-card p { font-size: 0.96rem; color: var(--ink-soft); }
.lab-card .lab-link { display: inline-block; margin-top: 1rem; font-weight: 600; font-size: 0.93rem; }

/* In the press */
.press {
  margin-top: 1.5rem;
  display: flex;
  gap: 2rem;
  align-items: center;
  border: 1px solid var(--hairline);
  background: var(--paper-deep);
  padding: 1.6rem;
}
.press img {
  width: 190px;
  flex-shrink: 0;
  border: 1px solid var(--hairline);
  box-shadow: 0 10px 24px rgba(32, 29, 26, 0.18);
}
.press h3 { font-family: var(--serif); font-size: 1.2rem; font-weight: 600; margin-bottom: 0.4rem; }
.press p { font-size: 0.96rem; color: var(--ink-soft); max-width: 52ch; }
@media (max-width: 560px) {
  .press { flex-direction: column; align-items: flex-start; }
}

/* ---------- Service ---------- */

.service-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; max-width: 60rem; }
.service-cols h3 { font-family: var(--serif); font-size: 1.15rem; font-weight: 600; margin-bottom: 0.7rem; }
.service-cols ul { list-style: none; }
.service-cols li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 0.94rem;
  color: var(--ink-soft);
}
.service-cols li:last-child { border-bottom: none; }
.service-cols li i { font-style: italic; }
.service-cols li span.role { color: var(--slate); }

/* ---------- Contact / footer ---------- */

.contact { background: var(--ink); color: var(--paper); margin-top: 4rem; }
.contact .wrap { padding-top: 3.6rem; padding-bottom: 3rem; }
.contact h2 { font-family: var(--serif); font-weight: 560; font-size: 2rem; }
.contact-grid {
  margin-top: 1.8rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}
.contact-grid h3 { font-size: 0.9rem; font-weight: 600; color: #b5aea4; margin-bottom: 0.4rem; }
.contact-grid p, .contact-grid a { color: #efece6; font-size: 1rem; }
.contact-grid a:hover { color: #fff; }
.profile-links { list-style: none; }
.profile-links li { padding: 0.2rem 0; }
.footer-line {
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid #45413b;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  font-size: 0.85rem;
  color: #8f897f;
}
.footer-line a { color: #b5aea4; }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .two-col { grid-template-columns: 1fr; }
  .two-col > aside { max-width: 340px; }
  .lab-grid, .service-cols { grid-template-columns: 1fr; }
  .nav-links { gap: 0.8rem; }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .hero .wrap { padding-top: 4rem; padding-bottom: 3.6rem; }
  .fact { border-left: none; padding-left: 0; }
}