/* Extends styles.css + landing.css for the course-detail page (public/course.html).
   Reuses the app-header/.s-status tokens from landing.css rather than a third
   visual language. */

.course-page { padding-top: 26px; padding-bottom: 60px; }
.course-status { color: var(--text-muted); font-size: 0.9rem; }
.course-status.error { color: var(--error); }

.course-hero { margin-bottom: 18px; }
.course-hero h1 { margin: 8px 0 6px; font-size: 1.4rem; color: var(--navy); }
@media (prefers-color-scheme: dark) { .course-hero h1 { color: var(--gold-light); } }
.course-lede { margin: 0; color: var(--text-muted); font-size: 0.92rem; }

.preview-banner {
  background: rgba(200, 150, 46, 0.1);
  border: 1px solid rgba(200, 150, 46, 0.35);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--navy);
  margin-bottom: 22px;
}
@media (prefers-color-scheme: dark) { .preview-banner { color: var(--gold-light); } }
.preview-banner a { color: var(--gold); font-weight: 700; }

.component-stub-note {
  background: var(--navy-pale);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.component-stub-note a { color: var(--navy); font-weight: 700; }
@media (prefers-color-scheme: dark) { .component-stub-note a { color: var(--gold-light); } }

.module-list { display: flex; flex-direction: column; gap: 16px; }
.module-block {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.module-block h2 {
  margin: 0;
  padding: 14px 18px;
  font-size: 0.95rem;
  color: var(--navy);
  border-bottom: 1px solid var(--border-soft);
}
@media (prefers-color-scheme: dark) { .module-block h2 { color: var(--gold-light); } }

.lesson-row { border-bottom: 1px solid var(--border-soft); }
.lesson-row:last-child { border-bottom: none; }
.lesson-row summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
}
.lesson-row summary::-webkit-details-marker { display: none; }
.lesson-row summary .lesson-title { flex: 1; }
.lesson-row[data-locked="true"] summary { cursor: default; color: var(--text-muted); }
.lesson-row .lesson-meta { font-size: 0.76rem; color: var(--text-muted); }
.lesson-row .badge {
  font-size: 0.64rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-radius: 999px;
  padding: 2px 8px;
  flex: none;
}
.badge.preview { background: rgba(26, 127, 55, 0.12); color: var(--success); }
.badge.locked { background: var(--chip-off-bg); color: var(--chip-off-text); }
.lesson-row .lesson-body {
  padding: 0 18px 16px 44px;
  font-size: 0.86rem;
  color: var(--text);
  line-height: 1.5;
}
.lesson-row .lesson-video {
  position: relative;
  padding-top: 56.25%; /* 16:9 */
  margin: 0 18px 16px 44px;
}
.lesson-row .lesson-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}
.lesson-row .lesson-video-picker { margin: 0 18px 16px 44px; }
.lesson-row .lesson-video-frame {
  position: relative;
  padding-top: 56.25%; /* 16:9 */
  background: var(--navy-pale);
  border-radius: var(--radius);
  overflow: hidden;
}
.lesson-row .lesson-video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}
.lesson-row .lesson-video-placeholder {
  position: absolute;
  inset: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.86rem;
  color: var(--text-muted);
}
.lesson-row .lesson-video-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.lesson-row .video-pick-btn {
  text-align: left;
  padding: 8px 14px;
  font-size: 0.82rem;
  font-weight: 500;
}
.lesson-row .video-pending {
  display: block;
  padding: 8px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.lesson-row .lesson-lock-note {
  padding: 0 18px 14px 44px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.lesson-row .lesson-lock-note a { color: var(--gold); font-weight: 700; }

.course-footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.course-footer a { color: var(--text-muted); }

.lesson-row .pdf-open-btn {
  margin: 0 18px 16px 44px;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 0.82rem;
}

/* ---------- PDF chapter viewer modal ---------- */
.pdf-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.72);
  display: flex;
  flex-direction: column;
}
/* An author-stylesheet class rule beats the browser's default [hidden] {
   display: none } at equal specificity — without this, "display: flex"
   above wins unconditionally and the modal stays visible regardless of the
   hidden attribute course.js toggles. */
.pdf-modal[hidden] {
  display: none;
}
.pdf-modal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}
.pdf-modal-bar #pdf-modal-title { font-weight: 700; font-size: 0.95rem; color: var(--navy); }
@media (prefers-color-scheme: dark) { .pdf-modal-bar #pdf-modal-title { color: var(--gold-light); } }
.pdf-modal-body {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px;
  background: #6b6b6b;
}
.pdf-page-canvas {
  max-width: 100%;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
}

/* Deterrence, not real prevention (lib/pdfChapters.js's watermark comment)
   — this is the second line of defense if a browser print dialog is
   triggered outside course.js's own Ctrl/Cmd+P block (e.g. via the browser's
   own menu). Nothing prints instead of leaking a clean copy. */
@media print {
  .pdf-modal { display: none !important; }
}
.pdf-modal-body, .pdf-page-canvas {
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none; /* iOS long-press "save image" affordance */
}