/* Course website (index.qmd) — sits on top of the Superhero theme */

:root {
  --accent: #df6919;
  --card-bg: rgba(255, 255, 255, 0.045);
  --card-border: rgba(255, 255, 255, 0.10);
  --muted: rgba(235, 235, 235, 0.68);
}

/* Title banner */
#title-block-header .quarto-title-banner {
  position: relative;
  overflow: hidden;
  padding: 3.2rem 0 2.6rem;
  margin-bottom: 0;
  color: #fff;
  background:
    radial-gradient(circle at 85% 20%, rgba(223, 105, 25, 0.22), transparent 45%),
    linear-gradient(135deg, #0f2537 0%, #1f3a52 60%, #2b3e4f 100%) !important;
  border-bottom: 3px solid var(--accent);
}
/* faint R code in the background */
#title-block-header .quarto-title-banner::before {
  content: "x <- c(1, 2, 3)   for (i in x) print(i)   mean(x)   df$age   if (x > 0) {...}";
  position: absolute;
  left: -2%;
  bottom: 0.4rem;
  white-space: nowrap;
  font-family: SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}
#title-block-header .quarto-title {
  position: relative;
}
#title-block-header .quarto-title::before {
  content: "ARCA · Applied Research Courses Academy";
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
#title-block-header h1.title {
  color: #fff;
  font-size: clamp(2.2rem, 5vw, 3.3rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}
#title-block-header .description p {
  max-width: 40rem;
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.8);
}
#title-block-header .quarto-title-meta {
  margin-top: 1.1rem;
}

/* Section headings with a small accent bar */
main h2 {
  margin-top: 2.6rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--card-border);
}
main h2::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 0.9em;
  margin-right: 0.55rem;
  border-radius: 3px;
  background: var(--accent);
  vertical-align: -0.05em;
}

/* At-a-glance strip */
.info-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0.5rem 0 1.5rem;
}
.info-strip p { display: contents; }
.info-item {
  display: inline-flex;
  align-items: center;
  gap: 0.25em;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  font-size: 0.92rem;
}
.info-item .bi { color: var(--accent); margin-right: 0.25rem; }

/* Pill button link */
a.btn-link-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
a.btn-link-pill:hover { filter: brightness(1.1); }

/* Schedule table */
table.schedule-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  overflow: hidden;
}
table.schedule-table thead th {
  background: rgba(223, 105, 25, 0.16);
  border-bottom: 1px solid var(--card-border);
}
table.schedule-table td,
table.schedule-table th { padding: 0.6rem 0.9rem; }
table.schedule-table td:first-child { font-weight: 700; color: var(--accent); }

/* Cards */
.lesson-card,
.exam-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
}
.lesson-card h3 {
  margin-top: 0.1rem;
  margin-bottom: 0.6rem;
  font-size: 1.15rem;
}
.lesson-card h3 + ul { margin-top: 0; }
.lesson-card ul + h3 { margin-top: 1.2rem; }
.lesson-card h3 .bi,
.exam-item .bi { color: var(--accent); margin-right: 0.3rem; }
.lesson-card ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0.4rem;
}
.lesson-card li {
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.lesson-card li:last-child { border-bottom: none; }

/* Lesson rows: title on the left, Slides/PDF tags on the right */
.lesson-grid .lesson-card li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

/* Slides / PDF tags on lesson rows */
.lesson-card .links {
  display: inline-flex;
  flex-shrink: 0;
  gap: 0.35rem;
}
.lesson-card .links a {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.1rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--accent);
  text-decoration: none;
}
.lesson-card .links a:first-child {
  background: var(--accent);
  color: #fff;
}
.lesson-card .links a:hover { filter: brightness(1.15); }

/* Credits footer */
.credits {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--card-border);
  font-size: 0.9rem;
  color: var(--muted);
}

@media (max-width: 575px) {
  .lesson-grid .lesson-card li { flex-wrap: wrap; }
}

/* Narrow screens: Quarto hides the left "Contents" sidebar, so show it as a card above the content */
@media (max-width: 767.98px) {
  #quarto-content {
    grid-template-rows: [toc-top] auto [content-top] auto [content-bottom] 60px [page-bottom] !important;
  }
  #quarto-sidebar-toc-left {
    display: block !important;
    position: static !important;
    grid-column: body-content-start / body-content-end !important;
    grid-row: toc-top / content-top !important;
    width: auto !important;
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
    padding: 0 !important;
    margin-top: 1rem;
  }
  #quarto-sidebar-toc-left #TOC {
    display: block !important;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.8rem 1.1rem;
  }
}