/* ============================================================
   Astro Course — Video Recordings
   Styling for everything below the site header only.
   ============================================================ */

#course-content {
  --c-bg: #ffffff;
  --c-bg-panel: #f6f7fa;
  --c-bg-panel-2: #ebeef4;
  --c-border: rgba(20,30,50,.12);
  --c-border-soft: rgba(20,30,50,.08);
  --c-text: #1a2438;
  --c-text-dim: #5b6579;
  --c-text-dimmer: #838da0;
  --c-gold: #b3791f;
  --c-gold-soft: rgba(179,121,31,.10);
  --c-teal: #1f9aa6;
  --c-teal-soft: rgba(31,154,166,.10);

  background: var(--c-bg);
  color: var(--c-text);
  font-family: 'Jost', sans-serif;
  padding-bottom: 4rem;
}

#course-content * { box-sizing: border-box; }

#course-content a { color: inherit; text-decoration: none; }

#course-content .course-container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- Intro ---------- */
.course-intro {
  padding: 4rem 0 2.5rem;
  text-align: center;
}

.course-title {
  font-family: 'Space Grotesk', 'Jost', sans-serif;
  font-weight: 700;
  font-size: clamp(2.1rem, 5vw, 3.1rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  color: var(--c-text);
}

.course-sub {
  font-size: 1.05rem;
  color: var(--c-text-dim);
  max-width: 640px;
  margin: 0 auto 1.75rem;
  line-height: 1.6;
}

.course-syllabus {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  border: 1px solid var(--c-border);
  background: var(--c-bg-panel);
  color: var(--c-text);
  padding: .65rem 1.25rem;
  border-radius: 999px;
  font-size: .88rem;
  transition: border-color .15s ease, background .15s ease, transform .15s ease;
}
.course-syllabus:hover {
  border-color: var(--c-gold);
  background: var(--c-gold-soft);
  transform: translateY(-1px);
}
.course-syllabus svg { flex: none; }

.course-hero-frame {
  margin: 2.75rem auto 2.5rem;
  max-width: 620px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--c-border);
  box-shadow: 0 20px 45px -25px rgba(20,30,50,.35);
}
.course-hero-frame img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- Filter bar ---------- */
.course-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  justify-content: center;
  padding: 1.25rem 0 .5rem;
}

.course-filter {
  font-family: 'JetBrains Mono', monospace;
  font-size: .74rem;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  background: transparent;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: .5rem 1rem;
  cursor: pointer;
  transition: all .15s ease;
}
.course-filter:hover { border-color: var(--c-teal); color: var(--c-text); }
.course-filter.is-active {
  background: var(--c-teal-soft);
  border-color: var(--c-teal);
  color: #0d5a62;
}

/* ---------- Log / timeline ---------- */
.course-log {
  margin: 3rem 0 0;
  padding: 0;
  position: relative;
}

.course-log::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--c-border) 4%, var(--c-border) 96%, transparent);
}

.course-note {
  position: relative;
  margin: 0 0 1.25rem 64px;
  padding: .85rem 1.1rem;
  background: transparent;
  border-left: 2px solid var(--c-gold);
  color: var(--c-text-dim);
  font-size: .92rem;
  line-height: 1.55;
}
.course-note strong { color: var(--c-text); font-weight: 500; }
.course-note a { color: var(--c-gold); border-bottom: 1px dotted rgba(179,121,31,.5); }
.course-note a:hover { color: var(--c-text); }

.course-card {
  position: relative;
  display: flex;
  gap: 1.4rem;
  margin: 0 0 1.75rem;
  transition: opacity .2s ease;
}

.course-card.is-hidden { display: none; }

.course-marker {
  flex: none;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--c-bg-panel-2);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', 'Jost', sans-serif;
  font-weight: 600;
  font-size: .92rem;
  letter-spacing: .01em;
  color: var(--c-gold);
  position: relative;
  z-index: 1;
}

.course-body {
  flex: 1;
  min-width: 0;
  background: var(--c-bg-panel);
  border: 1px solid var(--c-border-soft);
  border-radius: 12px;
  padding: 1.3rem 1.5rem 1.5rem;
}

.course-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--c-text-dimmer);
  text-transform: uppercase;
  margin: 0 0 .4rem;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .9rem;
}
.course-eyebrow .dur { color: var(--c-teal); }

.course-card-title {
  font-family: 'Space Grotesk', 'Jost', sans-serif;
  font-size: 1.28rem;
  font-weight: 600;
  color: var(--c-text);
  margin: 0 0 .3rem;
  line-height: 1.3;
}

.course-presenter {
  font-size: .92rem;
  color: var(--c-text-dim);
  margin: 0 0 1rem;
}
.course-presenter::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-gold);
  margin-right: .5rem;
  vertical-align: middle;
}

.course-watch {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  background: var(--c-teal);
  color: #ffffff;
  font-weight: 500;
  font-size: .9rem;
  padding: .6rem 1.1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  transition: background .15s ease, transform .15s ease;
}
.course-watch:hover { background: #187e88; transform: translateY(-1px); color: #ffffff; }
.course-watch svg { flex: none; }

.course-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .6rem;
}
.course-links li a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .82rem;
  color: var(--c-text-dim);
  border: 1px solid var(--c-border);
  border-radius: 7px;
  padding: .35rem .65rem;
  line-height: 1.3;
  transition: all .15s ease;
}
.course-links li a:hover {
  color: var(--c-text);
  border-color: var(--c-gold);
  background: var(--c-gold-soft);
}
.course-links li a svg { flex: none; opacity: .7; }

/* bonus / closing card variant */
.course-card.is-bonus .course-marker {
  background: var(--c-gold-soft);
  border-color: var(--c-gold);
  color: var(--c-gold);
}

/* ---------- Section label between groups (visual rhythm only) ---------- */
.course-group-label {
  margin: 3rem 0 1.25rem 64px;
  font-family: 'JetBrains Mono', monospace;
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-teal);
}

/* ---------- Footer / back link ----------
   Markup mirrors the header's own container > row > col-12 col-lg-6
   structure so this button renders at the exact same size as the
   one in the header, at every screen width. */
.course-footer {
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--c-border-soft);
}
.course-footer img {
  display: block;
  width: 100%;
  height: auto;
  opacity: .92;
  transition: opacity .15s ease, transform .15s ease;
}
.course-footer a:hover img { opacity: 1; transform: translateY(-1px); }

/* ---------- Responsive ---------- */
@media (max-width: 620px) {
  .course-log::before { left: 22px; }
  .course-card { gap: 1rem; }
  .course-marker { width: 46px; height: 46px; font-size: .78rem; }
  .course-body { padding: 1.1rem 1.1rem 1.3rem; }
  .course-note, .course-group-label { margin-left: 56px; }
  .course-intro { padding: 3rem 0 2rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .course-syllabus, .course-watch, .course-footer a img { transition: none; }
}