/* FreeCampus learning interface
   -----------------------------
   Quarto owns the structure; these styles turn it into a focused learning
   environment. Theme-specific color tokens live in theme-*.scss. */

html {
  scroll-padding-top: 5.5rem;
}

body {
  background: radial-gradient(
      circle at 10% 0%,
      var(--fc-brand-soft),
      transparent 25rem
    ),
    var(--fc-bg);
  color: var(--fc-text);
  text-rendering: optimizeLegibility;
}

body.quarto-light {
  color-scheme: light;
}

body.quarto-dark {
  color-scheme: dark;
}

::selection {
  background: var(--fc-brand);
  color: #fff;
}

a {
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

main.content {
  padding-bottom: 4rem;
}

main.content p,
main.content li {
  text-wrap: pretty;
}

main.content > p,
main.content > ul,
main.content > ol {
  max-width: 72ch;
}

h1,
h2,
h3,
h4 {
  color: var(--fc-heading);
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h1,
.quarto-title h1.title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  letter-spacing: -0.055em;
  line-height: 1.02;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.05rem);
  margin-top: 3.2rem;
}

h3 {
  font-size: 1.22rem;
  margin-top: 2rem;
}

#title-block-header {
  margin-bottom: 2rem;
}

.quarto-title .description,
.quarto-title > .subtitle {
  color: var(--fc-muted);
  font-size: 1.1rem;
  line-height: 1.65;
  max-width: 62ch;
}

.quarto-title-meta {
  color: var(--fc-muted);
}

.quarto-title .quarto-categories {
  gap: 0.4rem;
  margin-top: 1rem;
}

.quarto-title .quarto-category {
  background: var(--fc-brand-soft);
  border: 0;
  border-radius: 999px;
  color: var(--fc-brand-strong);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.02em;
  opacity: 1;
  padding: 0.3rem 0.62rem;
  text-transform: none;
}

/* Navigation */

#quarto-header .navbar {
  background: color-mix(in srgb, var(--fc-bg) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--fc-border) 82%, transparent);
  box-shadow: 0 1px 0 rgba(20, 26, 40, 0.02);
  min-height: 4.25rem;
  padding-block: 0.55rem;
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
}

.navbar-brand,
.navbar-title {
  color: var(--fc-heading) !important;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.navbar-title::before {
  background: linear-gradient(135deg, var(--fc-brand), var(--fc-accent));
  border-radius: 0.38rem;
  box-shadow: 0 0 0 4px var(--fc-brand-soft);
  content: "";
  display: inline-block;
  height: 0.78rem;
  margin-right: 0.62rem;
  transform: rotate(-8deg);
  width: 0.78rem;
}

.navbar-nav .nav-link {
  border-radius: 999px;
  color: var(--fc-muted) !important;
  font-size: 0.91rem;
  font-weight: 650;
  margin: 0 0.08rem;
  padding: 0.46rem 0.78rem !important;
  transition:
    background-color 160ms ease,
    color 160ms ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  background: var(--fc-brand-soft);
  color: var(--fc-brand-strong) !important;
}

.navbar #quarto-search.type-overlay .aa-Autocomplete svg.aa-SubmitIcon,
.navbar .quarto-color-scheme-toggle:not(.alternate) .bi::before {
  color: var(--fc-muted);
}

.quarto-navbar-tools .quarto-navigation-tool {
  color: var(--fc-muted);
}

.navbar-toggler {
  border-color: var(--fc-border);
}

body.quarto-light .navbar-toggler-icon {
  filter: invert(1);
  opacity: 0.68;
}

.quarto-secondary-nav {
  background: color-mix(in srgb, var(--fc-bg) 94%, transparent);
  border-bottom: 1px solid var(--fc-border);
  color: var(--fc-heading);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.quarto-secondary-nav .quarto-secondary-nav-title,
.quarto-secondary-nav .quarto-btn-toggle,
.quarto-secondary-nav .quarto-search-button {
  color: var(--fc-heading);
}

.sidebar.sidebar-navigation {
  background: transparent;
  border: 0;
  padding-top: 1.1rem;
}

.sidebar-title {
  color: var(--fc-heading);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.sidebar-navigation .sidebar-section {
  margin-bottom: 0.22rem;
}

.sidebar-navigation .sidebar-section .sidebar-section-item {
  color: var(--fc-muted);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.055em;
  padding-top: 0.8rem;
  text-transform: uppercase;
}

.sidebar-navigation .sidebar-item a {
  border-radius: 0.65rem;
  color: var(--fc-muted);
  font-size: 0.9rem;
  line-height: 1.35;
  margin-block: 0.07rem;
  padding-block: 0.38rem;
  text-decoration: none;
  transition:
    background-color 150ms ease,
    color 150ms ease,
    transform 150ms ease;
}

.sidebar-navigation .sidebar-item a:hover {
  background: var(--fc-surface-soft);
  color: var(--fc-heading);
}

.sidebar-navigation .sidebar-item a.active,
.sidebar-navigation .sidebar-item a.sidebar-link.active {
  background: var(--fc-brand-soft);
  color: var(--fc-brand-strong);
  font-weight: 750;
}

.sidebar-navigation .sidebar-item a.active::before,
.sidebar-navigation .sidebar-item a.sidebar-link.active::before {
  background: var(--fc-brand);
  border-radius: 999px;
  content: "";
  display: inline-block;
  flex: 0 0 0.18rem;
  height: 1.15rem;
  margin-left: -0.55rem;
  margin-right: 0.38rem;
  width: 0.18rem;
}

.sidebar-search input {
  background: var(--fc-surface);
  border-color: var(--fc-border);
  border-radius: 0.7rem;
  color: var(--fc-text);
}

#quarto-margin-sidebar {
  color: var(--fc-muted);
  font-size: 0.82rem;
}

#quarto-margin-sidebar .toc-title {
  color: var(--fc-heading);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

#TOC .nav-link {
  border-left: 1px solid var(--fc-border);
  color: var(--fc-muted);
  line-height: 1.35;
  padding-block: 0.31rem;
}

#TOC .nav-link:hover,
#TOC .nav-link.active {
  border-left-color: var(--fc-brand);
  color: var(--fc-brand-strong);
}

.quarto-reader-toggle .bi {
  color: var(--fc-muted);
}

/* Homepage */

.landing-page #title-block-header {
  display: none;
}

.landing-page main.content > :not(.hero):not(#title-block-header) {
  margin-left: auto;
  margin-right: auto;
  max-width: 1180px;
  width: 100%;
}

.course-hub #title-block-header,
.faq-hub #title-block-header {
  background: linear-gradient(135deg, var(--fc-brand-soft), transparent 70%),
    var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 1.25rem;
  box-shadow: var(--fc-shadow-sm);
  padding: clamp(1.3rem, 4vw, 2.4rem);
}

.course-hub #title-block-header h1,
.faq-hub #title-block-header h1 {
  margin-bottom: 0.65rem;
}

.hero {
  background: radial-gradient(
      circle at 88% 12%,
      var(--fc-brand-soft),
      transparent 18rem
    ),
    radial-gradient(
      circle at 72% 100%,
      color-mix(in srgb, var(--fc-accent) 11%, transparent),
      transparent 20rem
    ),
    var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: clamp(1.3rem, 3vw, 2rem);
  box-shadow: var(--fc-shadow-lg);
  isolation: isolate;
  margin: 2rem auto 3rem;
  max-width: 1180px;
  overflow: hidden;
  padding: clamp(2rem, 7vw, 5.7rem);
  position: relative;
}

.hero::after {
  background-image: radial-gradient(
    var(--fc-border-strong) 0.75px,
    transparent 0.75px
  );
  background-size: 13px 13px;
  content: "";
  inset: 0 0 0 58%;
  mask-image: linear-gradient(to left, black, transparent);
  opacity: 0.38;
  pointer-events: none;
  position: absolute;
  z-index: -1;
}

.hero h1 {
  font-size: clamp(2.85rem, 8vw, 6.1rem);
  letter-spacing: -0.072em;
  line-height: 0.94;
  margin: 0 0 1.5rem;
  max-width: 10ch;
}

.hero > p {
  color: var(--fc-muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.65;
  max-width: 65ch;
}

.hero-kicker {
  color: var(--fc-brand-strong);
  font-size: 0.79rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.72rem;
  margin: 2rem 0 2.5rem;
}

.hero-actions .btn,
.fc-colab-launch .btn {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-weight: 750;
  justify-content: center;
  padding: 0.72rem 1.15rem;
  text-decoration: none;
  transition:
    box-shadow 160ms ease,
    transform 160ms ease;
}

.hero-actions .btn:hover,
.fc-colab-launch .btn:hover {
  box-shadow: 0 10px 24px color-mix(in srgb, var(--fc-brand) 22%, transparent);
  transform: translateY(-2px);
}

.hero-stats {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1rem;
  max-width: 46rem;
}

.hero-stat {
  background: color-mix(in srgb, var(--fc-surface) 82%, transparent);
  border: 1px solid var(--fc-border);
  border-radius: 1rem;
  color: var(--fc-muted);
  font-size: 0.82rem;
  padding: 0.85rem 1rem;
}

.hero-stat strong {
  color: var(--fc-heading);
  display: block;
  font-size: 1.65rem;
  letter-spacing: -0.05em;
  line-height: 1.15;
}

/* Learning cards and pathways */

.course-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  margin: 1.4rem 0 2.6rem;
}

.course-card {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 1.15rem;
  box-shadow: var(--fc-shadow-sm);
  height: 100%;
  overflow: hidden;
  padding: clamp(1.15rem, 2.5vw, 1.55rem);
  position: relative;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.course-card::before {
  background: linear-gradient(90deg, var(--fc-brand), var(--fc-accent));
  content: "";
  height: 3px;
  inset: 0 100% auto 0;
  position: absolute;
  transition: inset 180ms ease;
}

.course-card:hover {
  border-color: color-mix(in srgb, var(--fc-brand) 35%, var(--fc-border));
  box-shadow: 0 18px 40px rgba(23, 32, 51, 0.09);
  transform: translateY(-3px);
}

.course-card:hover::before {
  right: 0;
}

.course-card h3 {
  font-size: 1.12rem;
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

.course-card h3 a {
  color: var(--fc-heading);
  text-decoration: none;
}

.course-card p,
.course-card li {
  color: var(--fc-muted);
  font-size: 0.94rem;
}

.course-card ul {
  border-top: 1px solid var(--fc-border);
  margin: 1rem 0 0;
  padding: 0.85rem 0 0 1.1rem;
}

.course-card .card-link,
.course-card a.card-link {
  color: var(--fc-brand-strong);
  display: inline-block;
  font-size: 0.91rem;
  font-weight: 800;
  margin-top: 0.3rem;
  text-decoration: none;
}

.course-card .card-link::after,
.course-card a.card-link::after {
  content: "  →";
  transition: margin-left 150ms ease;
}

.course-card .card-link:hover::after,
.course-card a.card-link:hover::after {
  margin-left: 0.2rem;
}

.audience-grid .course-card {
  min-height: 13rem;
}

.pathway > ol,
.pathway ol {
  counter-reset: learning-path;
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  padding: 0;
}

.pathway li {
  align-items: center;
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 0.85rem;
  counter-increment: learning-path;
  display: flex;
  gap: 0.75rem;
  min-height: 3.25rem;
  padding: 0.62rem 0.8rem;
}

.pathway li::before {
  align-items: center;
  background: var(--fc-brand-soft);
  border-radius: 999px;
  color: var(--fc-brand-strong);
  content: counter(learning-path);
  display: inline-flex;
  flex: 0 0 1.8rem;
  font-size: 0.78rem;
  font-weight: 850;
  height: 1.8rem;
  justify-content: center;
}

.pathway li a {
  color: var(--fc-heading);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

/* Learning components */

.lesson-meta {
  background: linear-gradient(135deg, var(--fc-brand-soft), transparent 85%),
    var(--fc-surface);
  border: 1px solid color-mix(in srgb, var(--fc-brand) 25%, var(--fc-border));
  border-radius: 1rem;
  box-shadow: var(--fc-shadow-sm);
  margin: 1rem 0 2rem;
  padding: 1rem 1.15rem;
}

.lesson-meta ul {
  display: grid;
  gap: 0.35rem 1.25rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
}

.lesson-meta li {
  color: var(--fc-muted);
  font-size: 0.88rem;
  margin: 0;
}

.lesson-meta strong {
  color: var(--fc-heading);
  font-weight: 800;
}

.fc-colab-launch {
  margin: 0.7rem 0 2rem;
}

.fc-colab-launch .btn::before {
  content: "↗";
  font-size: 1rem;
  margin-right: 0.5rem;
}

.colab-button {
  display: inline-block;
  margin: 0.4rem 0;
}

.callout {
  background: var(--fc-surface);
  border-radius: 1rem;
  box-shadow: none;
  margin-block: 1.5rem;
  overflow: hidden;
}

.callout.callout-style-default > .callout-header {
  background: transparent;
  border-bottom: 1px solid var(--fc-border);
  padding-block: 0.8rem;
}

.callout .callout-title-container {
  color: var(--fc-heading);
  font-weight: 750;
}

.callout.callout-style-default .callout-body {
  padding-block: 0.95rem;
}

.quiz-box {
  background: var(--fc-brand-soft);
  border-left: 3px solid var(--fc-brand);
  border-radius: 0.35rem 0.85rem 0.85rem 0.35rem;
  margin: 1.25rem 0;
  padding: 0.9rem 1rem;
}

details.solution,
details.hint,
details.instructor {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 0.85rem;
  margin: 0.9rem 0;
  padding: 0.75rem 0.95rem;
}

details.solution[open],
details.hint[open],
details.instructor[open] {
  box-shadow: var(--fc-shadow-sm);
}

details.solution summary,
details.hint summary,
details.instructor summary {
  color: var(--fc-brand-strong);
  cursor: pointer;
  font-weight: 750;
}

blockquote {
  border-left: 3px solid var(--fc-brand);
  color: var(--fc-muted);
  font-size: 1.02rem;
  padding-left: 1.1rem;
}

/* Code, output, and data */

code:not(pre code) {
  background: var(--fc-surface-tint);
  border: 1px solid color-mix(in srgb, var(--fc-brand) 15%, var(--fc-border));
  border-radius: 0.35rem;
  font-size: 0.86em;
  padding: 0.12em 0.34em;
}

div.sourceCode,
.cell-output pre {
  border: 1px solid var(--fc-border);
  border-radius: 0.9rem;
  box-shadow: var(--fc-shadow-sm);
  overflow: hidden;
}

div.sourceCode {
  background: var(--fc-surface);
  margin-block: 1.2rem;
}

pre.sourceCode {
  padding-block: 0.9rem;
}

.cell-output pre {
  background: var(--fc-surface-soft);
  box-shadow: none;
  color: var(--fc-text);
  margin-top: -0.65rem;
  padding: 0.9rem 1rem;
}

.code-copy-button {
  border-radius: 0.45rem !important;
  color: var(--fc-muted) !important;
}

pre.numberSource code > span > a:first-child::before {
  border-right-color: var(--fc-border);
  color: var(--fc-muted);
  opacity: 0.55;
}

table {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 0.8rem;
  border-spacing: 0;
  overflow: hidden;
}

thead {
  background: var(--fc-surface-soft);
}

.table > :not(caption) > * > * {
  border-bottom-color: var(--fc-border);
  padding: 0.72rem 0.8rem;
}

/* Interactive quizzes and diagrams */

.fcpython-quiz {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 1.1rem;
  box-shadow: var(--fc-shadow-sm);
  margin: 1.5rem 0;
  padding: clamp(1rem, 3vw, 1.4rem);
}

.fcpython-quiz h3 {
  font-size: 1.2rem;
  margin-top: 0;
}

.fcpython-quiz-question {
  border: 1px solid var(--fc-border);
  border-radius: 0.85rem;
  margin: 1rem 0;
  padding: 0.95rem;
}

.fcpython-quiz-question legend {
  color: var(--fc-heading);
  font-weight: 750;
  padding: 0 0.3rem;
}

.fcpython-quiz-option {
  align-items: flex-start;
  border-radius: 0.6rem;
  cursor: pointer;
  display: flex;
  gap: 0.55rem;
  margin: 0.35rem 0;
  padding: 0.48rem 0.55rem;
  transition: background-color 140ms ease;
}

.fcpython-quiz-option:hover {
  background: var(--fc-surface-soft);
}

.fcpython-quiz-option input {
  accent-color: var(--fc-brand);
  margin-top: 0.32rem;
}

.fcpython-quiz-feedback {
  color: var(--fc-muted);
  margin: 0.65rem 0 0;
}

.fcpython-quiz-feedback.is-correct {
  color: var(--fc-success);
  font-weight: 750;
}

.fcpython-quiz-feedback.is-incorrect {
  color: var(--fc-danger);
  font-weight: 750;
}

.fcpython-quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.fcpython-quiz-actions button {
  appearance: none;
  background: var(--fc-brand);
  border: 1px solid var(--fc-brand);
  border-radius: 999px;
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1.2;
  padding: 0.62rem 0.95rem;
  transition:
    box-shadow 150ms ease,
    transform 150ms ease;
}

.fcpython-quiz-actions button:hover {
  box-shadow: 0 8px 20px var(--fc-brand-soft);
  transform: translateY(-1px);
}

.fcpython-quiz-score {
  font-weight: 750;
}

.fcpython-quiz-warning {
  border-left: 4px solid var(--fc-danger);
}

.concept-diagram {
  background: linear-gradient(135deg, var(--fc-brand-soft), transparent 72%),
    var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 1rem;
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
}

.concept-diagram .mermaid {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 0.85rem;
  margin: 0.85rem 0 0;
  padding: 1rem;
}

/* Footer and page-to-page flow */

.nav-page {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: 0.9rem;
  color: var(--fc-muted);
  margin-top: 2rem;
  padding: 0.85rem 1rem;
  text-decoration: none;
}

.nav-page:hover {
  border-color: var(--fc-brand);
  color: var(--fc-brand-strong);
}

.nav-page .nav-page-text {
  font-weight: 700;
}

.page-footer {
  background: transparent;
  border-top: 1px solid var(--fc-border);
  color: var(--fc-muted);
  font-size: 0.84rem;
}

#quarto-back-to-top {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  box-shadow: var(--fc-shadow-sm);
  color: var(--fc-brand-strong);
}

/* Responsive refinements */

@media (min-width: 992px) {
  body:not(.floating):not(.docked) .page-columns {
    column-gap: 1.5rem;
  }

  .page-layout-full .course-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 991.98px) {
  #quarto-header .navbar {
    min-height: 3.8rem;
  }

  .navbar-collapse {
    background: var(--fc-surface);
    border: 1px solid var(--fc-border);
    border-radius: 1rem;
    box-shadow: var(--fc-shadow-lg);
    margin-top: 0.65rem;
    padding: 0.65rem;
  }

  .navbar-nav .nav-link {
    margin-block: 0.12rem;
  }

  .hero {
    margin-top: 1rem;
  }
}

@media (max-width: 700px) {
  html {
    scroll-padding-top: 4.5rem;
  }

  main.content {
    padding-bottom: 2.5rem;
  }

  h1,
  .quarto-title h1.title {
    font-size: clamp(2rem, 11vw, 2.8rem);
  }

  h2 {
    margin-top: 2.5rem;
  }

  .hero {
    border-radius: 1.25rem;
    padding: 1.6rem 1.25rem;
  }

  .hero h1 {
    font-size: clamp(2.6rem, 15vw, 4.2rem);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-stat {
    align-items: center;
    display: flex;
    gap: 0.7rem;
  }

  .hero-stat strong {
    min-width: 4rem;
  }

  .pathway > ol,
  .pathway ol,
  .lesson-meta ul {
    grid-template-columns: 1fr;
  }

  .course-grid {
    gap: 0.8rem;
  }

  .course-card:hover {
    transform: none;
  }

  table {
    font-size: 0.87rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}