/* Academic course site — CS231n-inspired clean layout */
:root {
  --c-bg: #f7f8fb;
  --c-paper: #ffffff;
  --c-ink: #1a2332;
  --c-muted: #5b677a;
  --c-line: #e4e8ef;
  --c-navy: #0b2a4a;
  --c-navy-2: #123a63;
  --c-accent: #8b6914;
  --c-gold: #c9a227;
  --c-soft: #eef3f9;
  --c-max: 980px;
  --c-radius: 12px;
}

.course-body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
  line-height: 1.65;
  min-height: 100vh;
}

.course-body h1,
.course-body h2,
.course-body h3 {
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
  letter-spacing: -0.01em;
}

html[lang="fa"] .course-body,
html[lang="ar"] .course-body {
  font-family: Vazirmatn, "Noto Sans Arabic", Inter, sans-serif;
}

.course-shell {
  width: min(var(--c-max), calc(100% - 2rem));
  margin-inline: auto;
}

.course-top {
  background: var(--c-navy);
  color: #fff;
  border-bottom: 3px solid var(--c-gold);
}

.course-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 52px;
  flex-wrap: wrap;
  padding: 0.55rem 0;
}

.course-home {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 0.95rem;
}

.course-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.85rem;
  font-size: 0.86rem;
}

.course-nav a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 0.1rem;
}

.course-nav a:hover,
.course-nav a.active {
  color: #fff;
  border-bottom-color: var(--c-gold);
}

.course-lang {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.78rem;
}

.course-masthead {
  background: linear-gradient(180deg, #102844 0%, #0b2a4a 100%);
  color: #fff;
  padding: 1.6rem 0 1.35rem;
}

.course-code-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin-bottom: 0.55rem;
}

.code-chip {
  display: inline-block;
  background: var(--c-gold);
  color: #1a1505;
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  padding: 0.28rem 0.62rem;
  border-radius: 6px;
}

.pill {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: rgba(255, 255, 255, 0.88);
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  font-size: 0.75rem;
}

.course-masthead h1 {
  margin: 0;
  font-size: clamp(1.55rem, 3.2vw, 2.35rem);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.course-subtitle {
  margin: 0.45rem 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.05rem;
}

.course-tagline {
  margin: 0.75rem 0 0;
  max-width: 46rem;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.02rem;
}

.course-main {
  padding: 1.4rem 0 2.8rem;
}

.course-panel {
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  border-radius: var(--c-radius);
  padding: 1.15rem 1.25rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 8px 24px rgba(16, 33, 58, 0.04);
}

.course-panel h2 {
  margin: 0 0 0.7rem;
  color: var(--c-navy);
  font-size: 1.28rem;
  border-bottom: 2px solid var(--c-soft);
  padding-bottom: 0.45rem;
}

.course-panel h3 {
  margin: 1.05rem 0 0.4rem;
  color: var(--c-navy-2);
  font-size: 1.02rem;
}

.course-panel p {
  margin: 0.55rem 0;
  color: var(--c-ink);
}

.course-panel .muted,
.muted {
  color: var(--c-muted);
}

.live-lab {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: 1rem;
  align-items: stretch;
}

.live-canvas-wrap {
  background: #0d1b2d;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid #1e334d;
  min-height: 280px;
}

#da-live-canvas {
  display: block;
  width: 100%;
  height: 280px;
}

.live-caption h3 {
  margin-top: 0;
}

.live-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
  margin-top: 0.85rem;
}

.live-stat {
  background: var(--c-soft);
  border-radius: 10px;
  padding: 0.65rem 0.7rem;
}

.live-stat strong {
  display: block;
  color: var(--c-navy);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.live-stat span {
  color: var(--c-ink);
  font-size: 0.95rem;
}

.course-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem 1.2rem;
  margin: 0.4rem 0 0;
  padding: 0;
  list-style: none;
}

.course-meta li {
  display: grid;
  gap: 0.12rem;
  padding: 0.65rem 0.75rem;
  background: var(--c-soft);
  border-radius: 10px;
  border: 1px solid var(--c-line);
}

.course-meta strong {
  color: var(--c-navy);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.course-meta span {
  color: var(--c-ink);
  font-size: 0.95rem;
}

.blocks-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.block-card {
  border: 1px solid var(--c-line);
  border-radius: 10px;
  padding: 0.85rem 0.9rem;
  background: linear-gradient(180deg, #fff, #fafbfd);
}

.block-card .num {
  color: var(--c-accent);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  font-family: Inter, sans-serif;
}

.block-card h3 {
  margin: 0.25rem 0 0.35rem;
  font-size: 1rem;
}

.block-card p {
  margin: 0;
  color: var(--c-muted);
  font-size: 0.92rem;
}

.topic-list {
  margin: 0.4rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: topic;
  columns: 2;
  column-gap: 1.2rem;
}

.topic-list li {
  break-inside: avoid;
  counter-increment: topic;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--c-line);
  color: var(--c-ink);
  font-size: 0.94rem;
}

.topic-list li::before {
  content: counter(topic, decimal-leading-zero) ". ";
  color: var(--c-accent);
  font-weight: 700;
  font-family: Inter, sans-serif;
  font-size: 0.82rem;
}

.staff-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.staff-card {
  border: 1px solid var(--c-line);
  border-radius: 12px;
  padding: 1rem 0.9rem;
  text-align: center;
  background: #fff;
}

.staff-avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 0.65rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(145deg, var(--c-navy), #2a5f8f);
  font-family: Inter, sans-serif;
  letter-spacing: 0.02em;
}

.staff-avatar.pending {
  background: linear-gradient(145deg, #6b7280, #9ca3af);
}

.staff-card h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--c-navy);
}

.staff-role {
  margin: 0.25rem 0 0;
  color: var(--c-muted);
  font-size: 0.82rem;
}

.prereq-list,
.logistics-list {
  margin: 0.35rem 0 0;
  padding-inline-start: 1.15rem;
}

.prereq-list li,
.logistics-list li {
  margin: 0.35rem 0;
}

.soon-note {
  display: inline-block;
  margin-top: 0.35rem;
  background: #fff8e8;
  color: #7a5b10;
  border: 1px solid #edd9a0;
  border-radius: 999px;
  padding: 0.22rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
}

.industry-box {
  background: linear-gradient(135deg, #102844, #1a3d66);
  color: #fff;
  border-radius: 12px;
  padding: 1.15rem 1.2rem;
  margin-top: 0.7rem;
}

.industry-box h3 {
  margin: 0 0 0.45rem;
  color: #fff;
}

.industry-box p {
  color: rgba(255, 255, 255, 0.9);
}

.industry-box a {
  color: #f0d98a;
  font-weight: 700;
}

.course-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.65rem;
  background: var(--c-gold);
  color: #1a1505 !important;
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  font-size: 0.9rem;
}

.course-btn:hover {
  filter: brightness(1.05);
}

.banner-strip {
  margin: 0.85rem 0 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--c-line);
}

.banner-strip img {
  display: block;
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  object-position: center top;
}

.course-footer {
  border-top: 1px solid var(--c-line);
  padding: 1.2rem 0 1.8rem;
  color: var(--c-muted);
  font-size: 0.9rem;
  text-align: center;
}

.course-footer a {
  color: var(--c-navy-2);
  text-decoration: none;
}

@media (max-width: 860px) {
  .live-lab,
  .blocks-grid,
  .staff-grid,
  .course-meta {
    grid-template-columns: 1fr;
  }

  .topic-list {
    columns: 1;
  }
}