/* Fall 2026 course site */

:root {
  --ut-burnt-orange: #bf5700;
  --ut-burnt-orange-dark: #8f3f00;
  --ink: #17212b;
  --muted: #5f6b76;
  --navy: #182b49;
  --paper: #fcfcfb;
  --surface: #ffffff;
  --line: #dfe3e6;
  --soft-orange: #fff2e8;
  --soft-blue: #eef4f8;
  --shadow: 0 6px 18px rgba(24, 43, 73, 0.07);
}

/* Typography and page rhythm */

body {
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

h1, h2, h3, h4, h5, h6,
.navbar-brand {
  color: var(--navy);
  font-family: "Avenir Next", Avenir, Inter, "Segoe UI", sans-serif;
  font-weight: 700;
  letter-spacing: -0.018em;
}

h2 {
  margin-top: 2.6rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid #e5e7e9;
}

h3 {
  margin-top: 2rem;
}

p, li {
  max-width: 78ch;
}

a {
  color: var(--ut-burnt-orange-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--ut-burnt-orange);
}

/* High-contrast navigation */

.navbar {
  min-height: 60px;
  background: var(--navy) !important;
  border-bottom: 2px solid var(--ut-burnt-orange);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.10);
}

.navbar .navbar-brand,
.navbar .nav-link,
.navbar .navbar-nav .nav-link,
.navbar .quarto-navbar-tools .quarto-navigation-tool {
  color: #ffffff !important;
}

.navbar .navbar-brand {
  font-size: 1.05rem;
  letter-spacing: 0;
}

.navbar .nav-link {
  border-radius: 0.35rem;
  font-size: 0.94rem;
  font-weight: 600;
  padding: 0.55rem 0.7rem !important;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus,
.navbar .nav-link.active,
.navbar .navbar-nav .show > .nav-link {
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.14);
}

.navbar-toggler {
  border-color: rgba(255, 255, 255, 0.7);
}

.navbar-toggler-icon {
  filter: invert(1);
}

/* Homepage hero */

.course-hero {
  position: relative;
  overflow: hidden;
  margin: 0 0 2.2rem;
  padding: clamp(1.8rem, 4vw, 3.25rem);
  color: #ffffff;
  background: linear-gradient(125deg, #162842 0%, var(--navy) 68%, #213a5c 100%);
  border-radius: 0 0 0.7rem 0.7rem;
  box-shadow: var(--shadow);
}

.course-hero::after {
  content: none;
}

.course-eyebrow {
  margin: 0 0 0.8rem;
  color: #eeb58a;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.course-hero h1 {
  max-width: 18ch;
  margin: 0;
  color: #ffffff;
  font-size: clamp(2.15rem, 5vw, 3.65rem);
  line-height: 1.06;
}

.course-deck {
  max-width: 62ch;
  margin: 1.25rem 0 0;
  color: #e7edf3;
  font-size: clamp(1rem, 1.6vw, 1.16rem);
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.35rem;
  margin-top: 1.6rem;
  color: #ffffff;
  font-size: 0.94rem;
  font-weight: 650;
}

.course-meta span {
  padding-left: 0.8rem;
  border-left: 2px solid #cf7b3b;
}

/* Quick links and course-track cards */

.quick-grid,
.track-grid {
  display: grid;
  gap: 1rem;
  margin: 1.25rem 0 2.4rem;
}

.quick-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Quarto wraps adjacent card links in a paragraph. Let the links
   participate directly in the grid instead of stacking in one column. */
.quick-grid {
  display: block;
}

.quick-grid > p {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
}

.track-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.quick-card,
.track-card {
  display: block;
  height: 100%;
  padding: 1.1rem;
  color: var(--ink) !important;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 2px solid #cf7b3b;
  border-radius: 0.5rem;
  box-shadow: 0 2px 8px rgba(24, 43, 73, 0.04);
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.quick-card:hover,
.track-card:hover {
  transform: translateY(-2px);
  border-color: #d0a17e;
  box-shadow: var(--shadow);
}

.quick-card strong,
.track-card strong {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--navy);
  font-size: 1.04rem;
}

.quick-card span,
.track-card p {
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.45;
}

.track-card {
  padding: 1.35rem;
  border-top-color: #728096;
}

.track-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 0.8rem;
  color: #ffffff;
  background: #9e4b12;
  border-radius: 50%;
  font-weight: 800;
}

/* Tables, callouts, and code */

.table {
  --bs-table-bg: transparent;
  margin: 1.2rem 0 2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 0.45rem;
}

.table thead th {
  color: #ffffff;
  background: var(--navy);
  border-bottom: 0;
}

.table tbody tr:nth-child(even) {
  background: #f5f7f8;
}

.callout {
  margin: 1.5rem 0;
  border-radius: 0.55rem;
  box-shadow: 0 3px 12px rgba(24, 43, 73, 0.05);
}

pre,
div.sourceCode {
  border-radius: 0.45rem;
}

.sidebar nav[role="doc-toc"] ul > li > a.active {
  color: var(--ut-burnt-orange-dark) !important;
  border-left-color: var(--ut-burnt-orange) !important;
}

.quarto-title-banner {
  color: #ffffff;
  background: linear-gradient(120deg, var(--navy), #25446d);
}

.quarto-title-banner h1,
.quarto-title-banner .subtitle {
  color: #ffffff;
}

.page-footer {
  margin-top: 4rem;
  color: #dce4ec;
  background: var(--navy);
  border-top: 2px solid var(--ut-burnt-orange);
}

.page-footer a {
  color: #ffffff;
}

/* Responsive behavior */

@media (max-width: 991px) {
  .quick-grid > p {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .navbar-collapse {
    padding: 0.75rem 0 1rem;
  }
}

@media (max-width: 620px) {
  .course-hero {
    margin-right: -0.75rem;
    margin-left: -0.75rem;
    padding: 2rem 1.25rem 2.3rem;
    border-radius: 0;
  }

  .quick-grid > p,
  .track-grid {
    grid-template-columns: 1fr;
  }

  .course-meta {
    display: grid;
  }
}

/* Accessible focus state */

a:focus-visible,
button:focus-visible {
  outline: 3px solid #f2a900;
  outline-offset: 3px;
}