@import url("https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@500;600;700&family=Source+Serif+4:wght@400;600;700&display=swap");

:root {
  --section-detail-color: #0f2d3d;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  color: #1f2937;
  background: #f6f9fc;
}

main.content {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.1rem 1rem 3.8rem;
}

h1, h2, h3, h4 {
  letter-spacing: -0.015em;
  color: #0f2d3d;
}

h1 {
  font-family: "Source Sans 3", "Segoe UI", Tahoma, sans-serif;
  font-size: 2rem;
  font-weight: 700;
  margin-top: 0.55rem;
  margin-bottom: 0.5rem;
}

h2 {
  font-family: "Source Sans 3", "Segoe UI", Tahoma, sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #607285;
  margin-top: 2.5rem;
  margin-bottom: 0.85rem;
  scroll-margin-top: 88px;
}

h3 {
  font-family: "Source Sans 3", "Segoe UI", Tahoma, sans-serif;
}

p, li {
  line-height: 1.72;
}

p {
  margin-bottom: 0.9rem;
}

a {
  color: #0f4d6e;
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 77, 110, 0.35);
  transition: color 120ms ease, border-color 120ms ease;
}

a:hover {
  color: #0b3f5a;
  border-bottom-color: rgba(15, 77, 110, 0.9);
}

.btn {
  border-bottom: none;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  border-bottom: 1px solid #dbe3ea;
  background: #ffffff !important;
}

.navbar .container-fluid {
  max-width: 980px;
  margin: 0 auto;
  padding: 0.7rem 1rem;
}

.navbar .navbar-brand {
  font-family: "Source Sans 3", "Segoe UI", Tahoma, sans-serif;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #102b3a !important;
}

.navbar .nav-link {
  font-family: "Source Sans 3", "Segoe UI", Tahoma, sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #3a4a58 !important;
  border-bottom: none;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus,
.navbar .nav-link.active {
  color: #0f4d6e !important;
}

.nr-home {
  text-align: left;
}

.nr-hero {
  margin-bottom: 1.8rem;
  text-align: left;
  background: #ffffff;
  border: 1px solid #e3eaf1;
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
}

.nr-headshot {
  width: 136px;
  height: 136px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid #d7e1e9;
}

.nr-button-row {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.45rem;
}

.nr-button-row .btn {
  font-family: "Source Sans 3", "Segoe UI", Tahoma, sans-serif;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.nr-home > ul {
  text-align: left;
  max-width: 820px;
  margin: 0;
  padding-left: 1.2rem;
}

.nr-home > ul li {
  margin-bottom: 0.5rem;
}

.nr-block {
  background: #ffffff;
  border: 1px solid #dfe8f0;
  border-radius: 14px;
  padding: 1rem 1.15rem 1.15rem;
  margin-top: 1.35rem;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.nr-block h2 {
  margin-top: 0.15rem;
  margin-bottom: 0.75rem;
}

.nr-news {
  border-top: 4px solid #2563eb;
}

.nr-news h2 {
  color: #1d4ed8;
}

.nr-news p,
.nr-news li {
  color: #1d4ed8;
}

.nr-research {
  border-top: 4px solid #0f766e;
}

.nr-research h2 {
  color: #0f766e;
}

.nr-research p,
.nr-research li {
  color: var(--section-detail-color);
}

.nr-research .research-card h3 {
  color: #0f766e;
}

.nr-teaching {
  border-top: 4px solid #b45309;
}

.nr-teaching h2 {
  color: #9a3412;
}

.nr-teaching p,
.nr-teaching li {
  color: var(--section-detail-color);
}

.nr-teaching .course-list h3 {
  color: #c2410c;
}

.nr-contact {
  border-top: 4px solid #334155;
}

.nr-contact h2 {
  color: #334155;
}

.nr-contact p,
.nr-contact li {
  color: #334155;
}

body.tone-darkblue {
  --section-detail-color: #1e3a8a;
}

body.tone-charcoal {
  --section-detail-color: #1f2937;
}

body.tone-slate {
  --section-detail-color: #334155;
}

body.tone-black {
  --section-detail-color: #111827;
}

body.tone-headings {
  --section-detail-color: #0f2d3d;
}

.course-list {
  max-width: 820px;
  margin: 0;
  text-align: left;
}

.course-list h3 {
  margin-top: 0.15rem;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: #0f2d3d;
}

.course-list hr {
  margin: 0.95rem 0 1.05rem;
  border-color: #e1e8ee;
}

#title-block-header {
  margin-bottom: 0.9rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid #e6ecf2;
}

.research-card {
  border: 1px solid #dbe6e0;
  border-radius: 8px;
  box-shadow: none;
  margin-bottom: 1rem;
  background: #fbfefd;
  text-align: left;
}

.research-card .card-body {
  padding: 0.9rem 1rem;
}

.research-card h3 {
  margin-top: 0.1rem;
  margin-bottom: 0.4rem;
  font-size: 1.12rem;
  color: #102f3f;
}

.research-card p:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  main.content {
    padding: 1.6rem 0.85rem 2.8rem;
  }

  .navbar .container-fluid {
    padding: 0.58rem 0.85rem;
  }

  .nr-headshot {
    width: 122px;
    height: 122px;
  }

  .nr-hero {
    padding: 1rem;
  }

  .nr-block {
    padding: 0.9rem 0.9rem 1rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  .nr-button-row {
    gap: 0.4rem;
  }

  .nr-home > ul,
  .course-list {
    max-width: 100%;
  }
}