/* Neel Ghoshal: portfolio */

:root {
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --text: #1b1e27;
  --text-dim: #565b6b;
  --border: #e6e8f0;
  --accent: #4f46e5;
  --accent-dim: #eef0fd;
  --card: #ffffff;
  --shadow: 0 1px 2px rgba(20, 20, 40, 0.04), 0 8px 24px rgba(20, 20, 40, 0.05);
  --radius: 14px;
  --maxw: 880px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12131a;
    --bg-alt: #191a23;
    --text: #eceef5;
    --text-dim: #a4a8ba;
    --border: #2a2c38;
    --accent: #8b85ff;
    --accent-dim: #201f36;
    --card: #171821;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.nav-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links li { flex-shrink: 0; }
.nav-links a {
  color: var(--text-dim);
  font-size: 0.92rem;
  font-weight: 500;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--accent); text-decoration: none; }

@media (max-width: 640px) {
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 0.85rem; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 48px;
}
.hero-inner {
  display: flex;
  align-items: center;
  gap: 36px;
}
.hero-photo {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid var(--card);
  box-shadow: var(--shadow);
}
.hero h1 {
  margin: 0 0 6px;
  font-size: 2rem;
  letter-spacing: -0.02em;
}
.hero .role {
  margin: 0 0 14px;
  color: var(--accent);
  font-weight: 600;
  font-size: 1.05rem;
}
.hero p.summary {
  margin: 0 0 18px;
  color: var(--text-dim);
  max-width: 60ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--card);
}
.btn:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover { color: #fff; opacity: 0.92; }
.icon-link {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.icon-link:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }
.icon-link svg { width: 18px; height: 18px; }

@media (max-width: 620px) {
  .hero-inner { flex-direction: column; text-align: center; align-items: center; }
  .hero p.summary { max-width: none; }
  .hero-actions { justify-content: center; }
}

/* ---------- Sections ---------- */
section { padding: 44px 0; }
section + section { border-top: 1px solid var(--border); }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 26px;
}
h2.h {
  font-size: 1.4rem;
  margin: 0;
  letter-spacing: -0.01em;
}
.section-sub { color: var(--text-dim); font-size: 0.92rem; margin: 4px 0 0; }

/* ---------- Timeline (experience) ---------- */
.timeline { display: flex; flex-direction: column; gap: 26px; }
.tl-item { display: grid; grid-template-columns: 150px 1fr; gap: 18px; }
.tl-when { color: var(--text-dim); font-size: 0.85rem; padding-top: 3px; }
.tl-body h3 { margin: 0 0 2px; font-size: 1.02rem; }
.tl-body .org { color: var(--accent); font-weight: 600; font-size: 0.92rem; }
.tl-body .loc { color: var(--text-dim); font-size: 0.85rem; }
.tl-body ul { margin: 10px 0 0; padding-left: 18px; color: var(--text-dim); font-size: 0.93rem; }
.tl-body li + li { margin-top: 5px; }

@media (max-width: 620px) {
  .tl-item { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- Projects ---------- */
.projects { display: flex; flex-direction: column; gap: 22px; }
.project-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 22px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.project-art {
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}
.project-art svg { width: 100%; height: auto; max-height: 150px; }
.project-body { padding: 20px 20px 20px 0; }
.project-body h3 { margin: 0 0 6px; font-size: 1.08rem; }
.project-body p { margin: 0 0 12px; color: var(--text-dim); font-size: 0.93rem; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tag {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 3px 10px;
  border-radius: 999px;
}
.project-link { font-size: 0.88rem; font-weight: 600; }

@media (max-width: 620px) {
  .project-card { grid-template-columns: 1fr; }
  .project-body { padding: 0 18px 18px; }
  .project-art { padding: 24px; }
}

/* ---------- Publications ---------- */
.pubs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.thesis-entry { grid-column: 1 / -1; }
.pub-card {
  display: flex;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.pub-art {
  width: 84px;
  height: auto;
  align-self: stretch;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.pub-art svg { width: 46px; height: 46px; }
.pub-body { padding: 14px 14px 14px 0; display: flex; flex-direction: column; justify-content: center; }
.pub-body h3 { margin: 0 0 4px; font-size: 0.92rem; line-height: 1.35; }
.pub-body h3 a { color: var(--text); }
.pub-body h3 a:hover { color: var(--accent); }
.pub-body .authors { color: var(--text-dim); font-size: 0.78rem; margin: 0 0 3px; }
.pub-body .venue { color: var(--text-dim); font-size: 0.78rem; font-style: italic; }
.pub-body .year { color: var(--accent); font-size: 0.78rem; font-weight: 600; margin-top: 3px; }
.pubs-note { color: var(--text-dim); font-size: 0.85rem; margin: 16px 0 0; }

@media (max-width: 620px) {
  .pubs { grid-template-columns: 1fr; }
}

/* ---------- Education ---------- */
.edu-item + .edu-item { margin-top: 20px; }
.edu-item h3 { margin: 0 0 2px; font-size: 1.02rem; }
.edu-item .when { color: var(--text-dim); font-size: 0.85rem; }
.edu-item p { color: var(--text-dim); font-size: 0.93rem; margin: 8px 0 0; }

.repo-link { display: inline-block; margin-top: 8px; margin-right: 16px; font-size: 0.85rem; font-weight: 600; }

/* ---------- Skills ---------- */
.skill-group + .skill-group { margin-top: 18px; }
.skill-group h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 0 0 10px;
}
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

/* ---------- Extras: certifications / leadership ---------- */
.extras { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.extras h3 { font-size: 0.98rem; margin: 0 0 12px; }
.extras ul { margin: 0; padding-left: 18px; color: var(--text-dim); font-size: 0.92rem; }
.extras li + li { margin-top: 8px; }

@media (max-width: 620px) {
  .extras { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */
footer {
  padding: 34px 0 48px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.86rem;
}
footer .icon-link { margin: 0 5px; }
footer .foot-links { margin-bottom: 14px; display: flex; justify-content: center; gap: 8px; }