/* Courses module — snooker academy visual language */
.cs-page {
  --cs-ink: #0b1f17;
  --cs-muted: #5b6b63;
  --cs-felt: #0f766e;
  --cs-felt-deep: #0a4f4a;
  --cs-felt-soft: rgba(15, 118, 110, 0.12);
  --cs-gold: #c4a35a;
  --cs-gold-soft: rgba(196, 163, 90, 0.16);
  --cs-surface: #ffffff;
  --cs-border: rgba(15, 35, 28, 0.08);
  --cs-radius: 18px;
  --cs-shadow: 0 12px 36px rgba(11, 31, 23, 0.1);
  max-width: 1140px;
  margin: 0 auto;
  padding: 20px 16px 48px;
  color: var(--cs-ink);
}

.cs-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--cs-radius);
  padding: 28px 32px;
  margin-bottom: 22px;
  color: #f0fdf9;
  background:
    radial-gradient(circle at 88% 18%, rgba(196, 163, 90, 0.28), transparent 42%),
    linear-gradient(135deg, var(--cs-felt) 0%, var(--cs-felt-deep) 48%, #102a24 100%);
  box-shadow: var(--cs-shadow);
}
.cs-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.35;
  pointer-events: none;
}
.cs-hero > * { position: relative; z-index: 1; }
.cs-hero__eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
}
.cs-hero__title {
  margin: 0 0 8px;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.02em;
}
.cs-hero__meta { margin: 0; opacity: 0.9; font-size: 15px; max-width: 52ch; }
.cs-hero__actions { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 10px; }

.cs-filters {
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 16px;
  margin-bottom: 20px;
  box-shadow: 0 4px 18px rgba(11, 31, 23, 0.04);
  display: grid;
  grid-template-columns: 1.4fr repeat(2, minmax(140px, 0.7fr)) auto;
  gap: 12px;
  align-items: end;
}
.cs-filters label {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--cs-muted);
}
.cs-filters .form-control {
  border-radius: 12px;
  border-color: rgba(15, 35, 28, 0.12);
  min-height: 42px;
}
.cs-filters__actions { display: flex; gap: 8px; flex-wrap: wrap; }

.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.cs-card {
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 24px rgba(11, 31, 23, 0.06);
  transition: transform .2s ease, box-shadow .2s ease;
}
.cs-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(11, 31, 23, 0.12);
}
.cs-card__cover {
  display: block;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--cs-felt), var(--cs-felt-deep));
  background-size: cover;
  background-position: center;
  position: relative;
}
.cs-card__cover::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 45%;
  background: linear-gradient(transparent, rgba(11, 31, 23, 0.55));
}
.cs-card__body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cs-card__title {
  margin: 0;
  font-size: 18px;
  font-weight: 750;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.cs-card__title a { color: inherit; text-decoration: none; }
.cs-card__title a:hover { color: var(--cs-felt); }
.cs-card__summary {
  color: var(--cs-muted);
  font-size: 13px;
  margin: 0;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.cs-card__meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 12px;
  color: var(--cs-muted);
}
.cs-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding-top: 4px;
  border-top: 1px solid rgba(15, 35, 28, 0.06);
}
.cs-card__price {
  font-weight: 800;
  font-size: 16px;
  color: var(--cs-ink);
}

.cs-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #eef2f0;
  color: #334155;
  font-weight: 700;
  font-size: 11px;
}
.cs-badge--vip { background: var(--cs-gold-soft); color: #8a6d2f; }
.cs-badge--free { background: rgba(22, 163, 74, 0.14); color: #15803d; }
.cs-badge--preview { background: var(--cs-felt-soft); color: var(--cs-felt-deep); }
.cs-badge--level { background: rgba(15, 23, 42, 0.06); }

.cs-empty {
  text-align: center;
  padding: 48px 24px;
  border: 1px dashed rgba(15, 35, 28, 0.18);
  border-radius: var(--cs-radius);
  background: linear-gradient(180deg, #f8faf9, #fff);
  color: var(--cs-muted);
}
.cs-empty i { font-size: 36px; margin-bottom: 12px; color: var(--cs-felt); opacity: 0.7; }

/* Landing */
.cs-landing {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr);
  gap: 24px;
  align-items: start;
}
.cs-landing__cover {
  border-radius: var(--cs-radius);
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
  margin-bottom: 18px;
  box-shadow: var(--cs-shadow);
  position: relative;
  overflow: hidden;
}
.cs-landing__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(11,31,23,0.45));
}
.cs-landing__title {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -0.03em;
}
.cs-landing__summary {
  font-size: 16px;
  color: var(--cs-muted);
  margin: 0 0 14px;
  max-width: 60ch;
}
.cs-landing__aside {
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 20px;
  height: fit-content;
  position: sticky;
  top: 88px;
  box-shadow: var(--cs-shadow);
}
.cs-price {
  font-size: 32px;
  font-weight: 800;
  margin: 4px 0 16px;
  letter-spacing: -0.03em;
  color: var(--cs-felt-deep);
}
.cs-aside-meta {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--cs-muted);
}
.cs-aside-meta strong { color: var(--cs-ink); }
.cs-btn-cta {
  display: block;
  text-align: center;
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none !important;
  border: 0;
  transition: transform .15s ease, box-shadow .15s ease;
}
.cs-btn-cta:hover { transform: translateY(-1px); }
.cs-btn-cta--primary {
  background: linear-gradient(135deg, var(--cs-felt), var(--cs-felt-deep));
  color: #fff !important;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.28);
}
.cs-btn-cta--success {
  background: linear-gradient(135deg, #16a34a, #15803d);
  color: #fff !important;
}
.cs-btn-cta--ghost {
  background: #f1f5f4;
  color: var(--cs-ink) !important;
}

.cs-panel {
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 18px 20px;
  margin-top: 20px;
  box-shadow: 0 4px 18px rgba(11, 31, 23, 0.04);
}
.cs-panel__title {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 750;
}
.cs-curriculum {
  list-style: none;
  padding: 0;
  margin: 0;
}
.cs-curriculum__section {
  margin: 14px 0 6px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cs-felt);
}
.cs-curriculum__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: background .15s ease, border-color .15s ease;
}
.cs-curriculum__item:hover {
  background: #f6faf8;
  border-color: rgba(15, 118, 110, 0.12);
}
.cs-curriculum__num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--cs-felt-soft);
  color: var(--cs-felt-deep);
  font-size: 12px;
  font-weight: 800;
  flex: 0 0 auto;
}
.cs-curriculum__name { flex: 1; font-weight: 600; }
.cs-curriculum__name a { color: inherit; }

.cs-review {
  padding: 14px 0;
  border-bottom: 1px solid rgba(15, 35, 28, 0.06);
}
.cs-review:last-child { border-bottom: 0; }
.cs-review__stars { color: var(--cs-gold); letter-spacing: 1px; }

/* Learn player */
.cs-learn {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
  min-height: 70vh;
}
.cs-learn__nav {
  background:
    radial-gradient(circle at top right, rgba(196, 163, 90, 0.18), transparent 40%),
    linear-gradient(180deg, #102a24 0%, #0b1f17 100%);
  color: #e2e8f0;
  border-radius: var(--cs-radius);
  padding: 16px;
  overflow: auto;
  max-height: calc(100vh - 120px);
  position: sticky;
  top: 80px;
  box-shadow: var(--cs-shadow);
}
.cs-learn__nav-title {
  font-weight: 750;
  margin-bottom: 10px;
  display: block;
  line-height: 1.3;
}
.cs-learn__nav-section {
  margin: 14px 0 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.65;
}
.cs-learn__nav a {
  color: #cbd5e1;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 9px 10px;
  border-radius: 10px;
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
}
.cs-learn__nav a.is-active,
.cs-learn__nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}
.cs-learn__nav a.done { color: #86efac; }
.cs-learn__player {
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 20px;
  box-shadow: 0 8px 24px rgba(11, 31, 23, 0.06);
}
.cs-learn__player h1 {
  margin: 0 0 16px;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.cs-video {
  position: relative;
  padding-top: 56.25%;
  background: #000;
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 18px;
  box-shadow: 0 10px 28px rgba(0,0,0,0.25);
}
.cs-video iframe,
.cs-video video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.cs-progress {
  height: 8px;
  background: rgba(255,255,255,0.12);
  border-radius: 999px;
  overflow: hidden;
  margin: 8px 0 6px;
}
.cs-progress > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cs-gold), #e8d5a3);
}
.cs-progress-label {
  font-size: 12px;
  opacity: 0.8;
  margin-bottom: 8px;
  display: block;
}
.cs-lesson-content {
  font-size: 15px;
  line-height: 1.7;
  color: #1f2937;
}
.cs-lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(15, 35, 28, 0.08);
}

/* Instructor / admin panels */
.cs-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.cs-toolbar h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.cs-admin-card {
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  padding: 18px 20px;
  margin-bottom: 18px;
  box-shadow: 0 4px 18px rgba(11, 31, 23, 0.04);
}
.cs-admin-card h2 {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 750;
}
.cs-lesson-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--cs-border);
  border-radius: 12px;
  margin-bottom: 8px;
  background: #fbfcfb;
}
.cs-lesson-row__info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.cs-hint {
  font-size: 12px;
  color: var(--cs-muted);
  margin-top: 4px;
}

@media (max-width: 960px) {
  .cs-filters { grid-template-columns: 1fr 1fr; }
  .cs-landing, .cs-learn { grid-template-columns: 1fr; }
  .cs-learn__nav {
    position: static;
    max-height: none;
  }
  .cs-landing__aside { position: static; }
}
@media (max-width: 640px) {
  .cs-filters { grid-template-columns: 1fr; }
  .cs-hero { padding: 22px 18px; }
}

.cs-badge--drill {
  background: rgba(15, 118, 110, 0.14);
  color: #0f766e;
}

.cs-filters--wide {
  grid-template-columns: 1.4fr repeat(4, minmax(120px, 0.7fr)) auto;
}
.cs-pagination {
  margin-top: 20px;
  display: flex;
  justify-content: center;
}
.cs-hero--academy .cs-hero__title {
  font-size: clamp(30px, 5vw, 42px);
}
.cs-drill-player.is-passed {
  outline: 2px solid #c4a35a;
  border-radius: 12px;
}
.cs-drill-player.is-passed .cs-drill-status {
  color: #0f766e;
  font-weight: 700;
}
@media (max-width: 1100px) {
  .cs-filters--wide { grid-template-columns: 1fr 1fr 1fr; }
}