.lrn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  padding: 4px 0;
}

.lrn-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 18px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.lrn-card:hover {
  transform: translateY(-2px);
  border-color: var(--sidebar-active-border);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

[data-theme="light"] .lrn-card:hover {
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
}

.lrn-card__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.3;
}

.lrn-card__desc {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lrn-card__meta {
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: 0.2px;
}

.lrn-progress {
  height: 4px;
  width: 100%;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  overflow: hidden;
}

[data-theme="light"] .lrn-progress {
  background: rgba(15, 23, 42, 0.08);
}

.lrn-progress__bar {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.lrn-empty,
.lrn-loading {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 220px;
  padding: 24px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  background: var(--coming-soon-bg);
  color: var(--text-2);
  font-size: 13px;
  text-align: center;
}

.lrn-empty__title {
  color: var(--text-1);
  font-weight: 600;
  font-size: 14px;
}

.lrn-empty__hint {
  font-size: 12px;
  color: var(--text-2);
}

/* ── Slideover ────────────────────────────────────────────────── */

.lrn-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 500;
  animation: lrn-fade-in 0.2s ease;
}

@keyframes lrn-fade-in { from { opacity: 0; } to { opacity: 1; } }

.lrn-slider {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(720px, 92vw);
  background: var(--bg);
  border-left: 1px solid var(--border);
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.3);
  z-index: 501;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.25s ease;
}

.lrn-slider.is-open { transform: translateX(0); }

.lrn-slider__head {
  position: relative;
  padding: 20px 56px 0 24px;
  border-bottom: 1px solid var(--border);
}

.lrn-slider__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-2);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.lrn-slider__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 16px;
  line-height: 1.3;
}

.lrn-slider__tabs {
  display: flex;
  gap: 8px;
  margin-bottom: -1px;
}

.lrn-tab {
  background: transparent;
  border: 1px solid var(--border);
  border-bottom-color: transparent;
  color: var(--text-2);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px 8px 0 0;
  transition: all 0.15s;
}

.lrn-tab:hover { color: var(--text-1); }
.lrn-tab.is-active {
  background: var(--bg-2);
  color: var(--accent);
  border-color: var(--border);
  border-bottom-color: var(--bg-2);
}

.lrn-slider__close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: none;
  color: var(--text-2);
  font-size: 20px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
}

.lrn-slider__close:hover { background: var(--bg-2); color: var(--text-1); }

.lrn-slider__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 24px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}

.lrn-slider__pills:empty { display: none; }

.lrn-pill {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.15s;
}

.lrn-pill:hover { border-color: var(--sidebar-active-border); color: var(--text-1); }
.lrn-pill.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.lrn-slider__body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.lrn-slider__foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-2);
}

.lrn-btn {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-1);
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  display: inline-block;
}

.lrn-btn:hover { border-color: var(--sidebar-active-border); }
.lrn-btn--primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.lrn-btn--primary:hover { filter: brightness(1.1); }
.lrn-btn--ghost { background: transparent; }

.lrn-slider__foot .lrn-btn[hidden] { display: none; }

/* Content blocks */

.lrn-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-1);
  margin-bottom: 12px;
}

.lrn-video {
  margin: 16px 0;
}

.lrn-video video {
  width: 100%;
  max-height: 480px;
  border-radius: 8px;
  background: #000;
  display: block;
}

.lrn-btn-wrap { margin: 16px 0; }

.lrn-gallery {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  margin: 16px 0;
}

.lrn-gallery img {
  width: 100%;
  border-radius: 8px;
  display: block;
}

.lrn-progress-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lrn-progress-hint {
  font-size: 12px;
  color: var(--text-2);
  font-style: italic;
  margin-bottom: 8px;
}

.lrn-progress-row {
  padding: 10px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-1);
}

.lrn-progress-num {
  color: var(--text-2);
  margin-right: 6px;
}

/* ── Radar custom video player (ported from radar-os) ───────────── */
/* Accent color: var(--accent) (purple/indigo ops) instead of var(--primary,#3AA7E2) */

.rp-wrap { position: relative; display: flex; flex-direction: column; background: #000; border-radius: 12px; overflow: hidden; margin: 16px 0; user-select: none; }
.rp-video { width: 100%; display: block; max-height: 480px; object-fit: contain; cursor: pointer; flex-shrink: 0; }
.rp-click-hint { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0.8); width: 72px; height: 72px; border-radius: 50%; background: var(--accent); display: flex; align-items: center; justify-content: center; pointer-events: none; will-change: transform; opacity: 0; transition: opacity .18s, transform .18s; z-index: 4; }
.rp-click-hint.is-visible { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.rp-bar { background: linear-gradient(transparent, rgba(0, 0, 0, .72)); padding: 4px 12px 6px; flex-shrink: 0; transition: opacity .3s; }
.rp-progress-wrap { padding: 0 2px 6px; }
.rp-progress-bar { position: relative; height: 3px; background: rgba(255, 255, 255, .22); border-radius: 2px; cursor: pointer; transition: height .15s; }
.rp-progress-bar:hover { height: 5px; }
.rp-progress-fill { position: absolute; top: 0; left: 0; height: 100%; background: var(--accent); border-radius: 2px; pointer-events: none; }
.rp-progress-thumb { position: absolute; top: 50%; transform: translate(-50%, -50%); width: 13px; height: 13px; background: #fff; border-radius: 50%; pointer-events: none; opacity: 0; transition: opacity .15s; }
.rp-progress-bar:hover .rp-progress-thumb { opacity: 1; }
.rp-ctrl-row { display: flex; align-items: center; gap: 2px; }
.rp-btn { background: none; border: none; color: #fff; cursor: pointer; width: 36px; height: 36px; padding: 6px; display: flex; align-items: center; justify-content: center; opacity: .85; transition: opacity .15s; flex-shrink: 0; border-radius: 4px; }
.rp-btn:hover { opacity: 1; background: rgba(255, 255, 255, .08); }
.rp-time { font-size: 12px; color: rgba(255, 255, 255, .85); white-space: nowrap; font-variant-numeric: tabular-nums; padding: 2px 8px; background: rgba(0, 0, 0, .35); border-radius: 4px; margin: 0 4px; }
.rp-vol-wrap { position: relative; display: flex; align-items: center; gap: 0; }
.rp-vol-range { width: 0; opacity: 0; height: 3px; cursor: pointer; accent-color: var(--accent); transition: width .2s, opacity .2s; }
.rp-vol-wrap:hover .rp-vol-range { width: 68px; opacity: 1; }
.rp-speed-wrap { position: relative; }
.rp-speed-btn { font-size: 11px; font-weight: 600; min-width: 28px; }
.rp-speed-menu { position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%); background: #141F33; border: 1px solid rgba(255, 255, 255, .12); border-radius: 8px; padding: 4px; min-width: 70px; z-index: 10; }
.rp-speed-menu button { display: block; width: 100%; background: none; border: none; color: #DCE4F0; padding: 5px 10px; font-size: 12px; cursor: pointer; border-radius: 4px; text-align: center; }
.rp-speed-menu button:hover { background: rgba(255, 255, 255, .07); }
.rp-speed-menu button.is-active { color: var(--accent); font-weight: 600; }
.rp-poster { width: 100%; display: block; aspect-ratio: 16 / 9; object-fit: cover; }
.rp-poster--blank { width: 100%; aspect-ratio: 16 / 9; background: #111; }
.rp-thumb-play { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 60px; height: 60px; border-radius: 50%; background: rgba(0, 0, 0, .6); display: flex; align-items: center; justify-content: center; font-size: 24px; color: #fff; padding-left: 5px; pointer-events: none; transition: transform .15s, background .15s; }
.rp-wrap:hover .rp-thumb-play { background: rgba(0, 0, 0, .8); transform: translate(-50%, -50%) scale(1.08); }
.rp-wrap:fullscreen { border-radius: 0; display: flex; flex-direction: column; width: 100vw; height: 100vh; }
.rp-wrap:fullscreen .rp-video { flex: 1; max-height: none; min-height: 0; }
.rp-wrap:fullscreen .rp-bar { flex-shrink: 0; }
.rp-wrap:-webkit-full-screen { border-radius: 0; display: flex; flex-direction: column; width: 100vw; height: 100vh; }
.rp-wrap:-webkit-full-screen .rp-video { flex: 1; max-height: none; min-height: 0; }
.rp-wrap:-webkit-full-screen .rp-bar { flex-shrink: 0; }