:root {
  --otlms-bg: #f7f5ef;
  --otlms-panel: #ffffff;
  --otlms-ink: #121212;
  --otlms-accent: #2e7d32;
  --otlms-muted: #63717c;
  --otlms-stroke: #dce1e7;
  --otlms-module-header-bg: #edf2f8;
  --otlms-module-header-color: #1d2733;
  --otlms-module-header-font: inherit;
  --otlms-icon-circle: #2e7d32;
}

.otlms-overview {
  display: grid;
  gap: 1rem;
}

.otlms-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  background: var(--otlms-panel);
  color: var(--otlms-ink);
  text-decoration: none;
  border: 1px solid var(--otlms-stroke);
  border-radius: 12px;
  overflow: hidden;
}

.otlms-card-image {
  min-height: 160px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.otlms-lock {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.otlms-card-content {
  padding: 1rem;
}

.otlms-progress {
  margin-top: .75rem;
  color: var(--otlms-accent);
  font-weight: 700;
}

.otlms-player {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 20%);
  gap: 1rem;
  align-items: start;
}

.otlms-player.is-collapsed {
  grid-template-columns: minmax(0, 1fr) 64px;
}

.otlms-sidebar {
  background: var(--otlms-panel);
  border: 1px solid var(--otlms-stroke);
  border-radius: 12px;
  padding: 1rem;
  position: sticky;
  top: 1rem;
  max-height: 88vh;
  overflow: auto;
  grid-column: 2;
}

.otlms-sidebar-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: .5rem;
}

.otlms-sidebar-toggle {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: none;
  background: var(--otlms-icon-circle);
  color: #fff;
  cursor: pointer;
  font-size: 16px;
}

.otlms-module summary {
  background: var(--otlms-module-header-bg);
  color: var(--otlms-module-header-color);
  padding: .55rem .65rem;
  border-radius: 8px;
  font-family: var(--otlms-module-header-font);
}

.otlms-sidebar ul {
  list-style: none;
  margin: .5rem 0 1rem;
  padding: 0;
}

.otlms-sidebar li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .5rem;
  margin-bottom: .35rem;
}

.otlms-content {
  background: var(--otlms-panel);
  border: 1px solid var(--otlms-stroke);
  border-radius: 12px;
  padding: 1.25rem;
  grid-column: 1;
}

.otlms-content > *:first-child {
  margin-top: 0;
}

.otlms-module-html section {
  margin-top: 0 !important;
}

.otlms-nav {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
  gap: .6rem;
}

.otlms-prev,
.otlms-next,
.otlms-note-btn {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: none;
  background: var(--otlms-icon-circle);
  color: #fff !important;
  text-decoration: none;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.otlms-note-btn {
  width: 30px;
  height: 30px;
  font-size: 14px;
}

.otlms-discuss-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: var(--otlms-icon-circle);
  color: #fff;
  text-decoration: none;
  margin-bottom: .75rem;
}

.otlms-player.is-collapsed .otlms-module,
.otlms-player.is-collapsed .otlms-sidebar ul,
.otlms-player.is-collapsed .otlms-discuss-link {
  display: none;
}

.otlms-player.is-collapsed .otlms-sidebar {
  padding: .6rem;
}

.otlms-note-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
}

.otlms-note-modal[hidden] {
  display: none !important;
}

.otlms-note-box {
  width: min(92vw, 680px);
  background: var(--otlms-panel);
  border-radius: 12px;
  padding: 1rem;
}

.otlms-note-box textarea {
  width: 100%;
}

.otlms-topic,
.otlms-topic-create {
  border: 1px solid var(--otlms-stroke);
  background: #fff;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.otlms-topic-create textarea,
.otlms-topic-create input {
  width: 100%;
  margin-bottom: .5rem;
}

@media (max-width: 960px) {
  .otlms-card {
    grid-template-columns: 1fr;
  }

  .otlms-player {
    grid-template-columns: 1fr;
  }

  .otlms-sidebar {
    grid-column: 1;
    position: static;
    max-height: none;
  }

  .otlms-player.is-collapsed {
    grid-template-columns: 1fr;
  }

  .otlms-content {
    grid-column: 1;
  }
}