/* ---------------------------------------------------------------
   Sameer Aryal — personal site
   Modern, minimal, industry-style stylesheet (no framework deps)
   --------------------------------------------------------------- */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fa;
  --color-border: #e4e7ec;
  --color-text: #16181d;
  --color-text-muted: #5b6270;
  --color-text-faint: #8b909c;
  --color-accent: #1d4ed8;
  --color-accent-dark: #1739a6;
  --color-accent-bg: #eef2ff;
  --max-width: 980px;
  --radius: 10px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

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

img { max-width: 100%; }

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

/* ---------- Top nav ---------- */

.site-nav {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 10px;
}

.site-nav .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
}
.site-nav .brand:hover { text-decoration: none; color: var(--color-accent); }

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 16px 22px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  flex: 1 1 auto;
  justify-content: flex-end;
  min-width: 0;
}

.site-nav a.nav-link {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  font-weight: 500;
}
.site-nav a.nav-link:hover { color: var(--color-accent); text-decoration: none; }

/* ---------- Page shell ---------- */

.content {
  padding-top: 44px;
  padding-bottom: 64px;
}

.page-header h1 {
  font-size: 1.9rem;
  margin: 0 0 8px;
}
.page-header .tagline {
  color: var(--color-text-muted);
  margin: 0 0 32px;
  font-size: 1.05rem;
}

h2 {
  font-size: 1.35rem;
  margin: 2.2em 0 0.6em;
}
h2:first-child { margin-top: 0; }

h3 {
  font-size: 1.05rem;
  margin: 1.6em 0 0.5em;
}

p { margin: 0 0 1em; }

/* ---------- Hero (home page) ---------- */

.hero {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.hero img.headshot {
  width: 230px;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
}

.hero-text {
  /* Right edge should align with .summary/.training below, which start at
     the container's left edge — subtract the photo + gap this block is
     offset by so both column right edges land at the same 720px mark. */
  max-width: calc(720px - 230px - 40px);
}

.hero-text h1 {
  font-size: 2rem;
  margin: 0 0 4px;
}

.hero-text .role {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin: 0 0 14px;
}

.hero-text .role a { color: var(--color-text-muted); text-decoration: underline; }

.summary {
  font-size: 1.02rem;
  color: var(--color-text);
  max-width: 720px;
}

.training {
  font-size: 1.02rem;
  color: var(--color-text);
  max-width: 720px;
}

/* ---------- Buttons ---------- */

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 8px;
}

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.btn:hover { text-decoration: none; border-color: var(--color-accent); color: var(--color-accent); }

.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.btn-primary:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: #fff; }

/* ---------- Expertise tag grid ---------- */

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 6px;
}

.tag {
  background: var(--color-accent-bg);
  color: var(--color-accent-dark);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin: 18px 0 8px;
}

.expertise-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--color-bg-alt);
}

.expertise-card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.expertise-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* ---------- Experience / research blocks ---------- */

.entry {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}
.entry:last-child { border-bottom: none; }

.entry .entry-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.entry h3 {
  margin: 0;
  font-size: 1.05rem;
}

.entry .entry-meta {
  color: var(--color-text-faint);
  font-size: 0.88rem;
  white-space: nowrap;
}

.entry .entry-org {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin: 2px 0 8px;
}

.entry ul {
  margin: 6px 0 0;
  padding-left: 1.2em;
}
.entry li { margin-bottom: 6px; font-size: 0.96rem; }

.callout {
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px;
  margin: 18px 0;
  font-size: 0.94rem;
  color: var(--color-text-muted);
}

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

.pub-meta-row {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  margin-bottom: 28px;
}

.pub-asof {
  color: var(--color-text-faint);
  font-size: 0.88rem;
}

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

.pub-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}
.pub-list li:last-child { border-bottom: none; }

.pub-title {
  font-weight: 600;
  font-size: 0.98rem;
}

.pub-meta {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin-top: 2px;
}

.pub-blurb {
  font-size: 0.92rem;
  color: var(--color-text);
  margin-top: 6px;
}

.pub-status {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-accent-dark);
  background: var(--color-accent-bg);
  border-radius: 999px;
  padding: 1px 9px;
  margin-left: 8px;
  vertical-align: middle;
}

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

.contact-block {
  margin-top: 8px;
  font-size: 0.96rem;
  color: var(--color-text-muted);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
}

.site-footer .wrap {
  padding: 24px 24px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}

.social-links {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.social-links a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}
.social-links a:hover { color: var(--color-accent); }

.copyright {
  color: var(--color-text-faint);
  font-size: 0.85rem;
}

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

@media (max-width: 640px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
  .hero img.headshot {
    width: 160px;
    height: auto;
  }
  .hero-text {
    max-width: 720px;
  }
  .content { padding-top: 28px; }
  .site-footer .wrap { flex-direction: column; align-items: flex-start; }
  .site-nav ul { justify-content: flex-start; gap: 10px 16px; }
  .entry .entry-head { flex-direction: column; align-items: flex-start; gap: 2px; }
}