/* =========================================================
   Hossein Zaremehrjerdi — personal site
   Style: clean white, bold cobalt accent, Karpathy-inspired
   Goal: 8-second skim by busy postdoc PIs
   ========================================================= */

:root {
  --bg: #ffffff;
  --ink: #0a0a0a;
  --ink-soft: #404040;
  --ink-muted: #737373;
  --rule: #e5e5e5;
  --rule-soft: #f5f5f5;
  --accent: #1652f0;        /* deep cobalt — bold, intentional */
  --accent-hover: #0d3fc2;
  --accent-soft: #eef3fe;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.06);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.55;
  font-feature-settings: "kern", "ss01", "cv11";
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

/* ========== HERO ========== */
.hero {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}

.hero-photo {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--rule-soft);
}

.hero-text h1 {
  font-size: 1.9rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.role {
  font-size: 1.02rem;
  margin: 0;
  color: var(--ink);
  font-weight: 500;
}

.role-sub {
  font-size: 0.95rem;
  color: var(--ink-muted);
  margin: 0.15rem 0 0.9rem;
}

.role-sub a {
  color: var(--ink-muted);
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 2px;
}

.role-sub a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.links a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1.5px solid var(--accent);
  padding-bottom: 1px;
  transition: color 0.15s;
}

.links a:hover {
  color: var(--accent);
}

/* ========== ABOUT ========== */
.about {
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}

.about p {
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0 0 0.9rem;
  color: var(--ink-soft);
}

.about strong {
  color: var(--ink);
  font-weight: 600;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem !important;
  color: var(--ink) !important;
  background: var(--accent-soft);
  padding: 0.5rem 0.9rem;
  border-radius: 6px;
  margin: 0.4rem 0 0 !important;
}

.status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ========== SECTIONS ========== */
section {
  margin-bottom: 3rem;
}

section h2 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  margin: 0 0 1.4rem;
}

/* ========== LINKS (body) ========== */
a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ========== RESEARCH BULLETS ========== */
.research-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
}

.research-bullets li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.55rem;
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

.research-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.research-bullets strong {
  color: var(--ink);
  font-weight: 600;
}

/* ========== PROJECT CARDS ========== */
.project-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.4rem;
  padding: 1.1rem;
  margin-bottom: 0.9rem;
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: var(--bg);
  transition: border-color 0.18s, box-shadow 0.18s, transform 0.18s;
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.thumb {
  display: block;
  width: 140px;
  height: 100px;
  border-radius: 6px;
  overflow: hidden;
  background: linear-gradient(135deg, #f5f5f5 0%, #e5e5e5 100%);
  position: relative;
  flex-shrink: 0;
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* When image is missing, show a placeholder pattern */
.thumb.no-img {
  background:
    repeating-linear-gradient(
      45deg,
      #fafafa,
      #fafafa 8px,
      #f0f0f0 8px,
      #f0f0f0 16px
    );
}

.thumb.no-img::after {
  content: "image";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  letter-spacing: 0.05em;
}

.project-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.2rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.project-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
}

.project-body p {
  font-size: 0.93rem;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.55;
}

.project-body strong {
  color: var(--ink);
  font-weight: 600;
}

.project-links {
  margin-top: 0.5rem !important;
  display: flex;
  gap: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.78rem !important;
}

.project-links a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 1px;
}

.project-links a:hover {
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* ========== TIMELINE ========== */
.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 48px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--rule);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.4rem;
  position: relative;
}

.timeline-date {
  width: 48px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  padding-top: 0.6rem;
}

.timeline-content {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex: 1;
  padding-left: 0.5rem;
  position: relative;
}

.timeline-content::before {
  content: "";
  position: absolute;
  left: -1.5px;
  top: 1.05rem;
  width: 8px;
  height: 8px;
  background: var(--bg);
  border: 2px solid var(--accent);
  border-radius: 50%;
}

.timeline-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 8px;
  background: #ffffff;
  border: 1px solid var(--rule);
  padding: 5px;
  flex-shrink: 0;
}

.timeline-text {
  flex: 1;
}

.t-title {
  font-size: 0.96rem;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
}

.t-sub {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0.1rem 0 0;
}

/* ========== PUBLICATIONS ========== */
.pub-note {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: -0.8rem 0 1.2rem;
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pub-list li {
  font-size: 0.93rem;
  line-height: 1.55;
  margin-bottom: 0.9rem;
  padding-left: 1rem;
  border-left: 2px solid var(--rule);
  color: var(--ink-soft);
}

.pub-list strong {
  color: var(--ink);
  font-weight: 600;
  display: block;
  margin-bottom: 0.1rem;
}

.pub-list .authors {
  display: block;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.pub-list u {
  text-decoration: none;
  border-bottom: 1.5px solid var(--accent);
  color: var(--ink);
  font-weight: 500;
}

.pub-list .venue {
  font-style: italic;
  color: var(--ink-muted);
  font-size: 0.88rem;
}

.pub-list a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-left: 0.4rem;
}

.pub-list a:hover {
  text-decoration: underline;
}

/* ========== FOOTER ========== */
footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  text-align: center;
}

footer p { margin: 0; }

footer a {
  color: var(--ink-muted);
  text-decoration: underline;
  text-decoration-color: var(--rule);
}

footer a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 600px) {
  main {
    padding: 2rem 1.1rem 3rem;
  }

  .hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.2rem;
  }

  .hero-photo {
    width: 100px;
    height: 100px;
  }

  .hero-text h1 {
    font-size: 1.6rem;
  }

  .project-card {
    grid-template-columns: 1fr;
    gap: 0.9rem;
  }

  .thumb {
    width: 100%;
    height: 160px;
  }

  .timeline::before { left: 40px; }
  .timeline-date { width: 40px; font-size: 0.75rem; }
}

/* ========== PRINT ========== */
@media print {
  body { background: white; color: black; }
  .hero-photo, .thumb, .timeline-logo { display: none; }
  .project-card { border: 1px solid #ccc; box-shadow: none; }
  a { color: black; }
}