/* ==========================================================================
   SJCC LEARN — PDF READER CSS (#/read/:courseId/:lessonId)
   PDF.js in-page viewer, Page Dwell Timer, Zoom, Sepia/Dark Themes
   ========================================================================== */

.reader-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height));
  background-color: var(--surface-2);
}

.reader-toolbar {
  height: 52px;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  box-shadow: var(--shadow-1);
  z-index: 10;
  flex-shrink: 0;
}

.reader-toolbar-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.reader-dwell-timer {
  font-size: var(--text-xs);
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--surface-3);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
}

.reader-dwell-timer.met {
  background-color: var(--success-soft);
  color: var(--success);
  font-weight: bold;
}

.reader-viewport {
  flex: 1;
  overflow-y: auto;
  display: flex;
  justify-content: center;
  padding: var(--space-6);
  position: relative;
}

.pdf-page-canvas {
  box-shadow: var(--shadow-3);
  background-color: #FFFFFF;
  border-radius: var(--radius-xs);
  max-width: 100%;
}

.reader-watermark {
  position: fixed;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-30deg);
  color: rgba(0, 0, 0, 0.08);
  font-size: 2rem;
  font-weight: bold;
  pointer-events: none;
  user-select: none;
  z-index: 100;
  font-family: var(--font-mono);
  white-space: nowrap;
}

[data-theme="dark"] .reader-watermark {
  color: rgba(255, 255, 255, 0.08);
}

/* Responsive Rules */
@media (max-width: 768px) {
  .reader-toolbar {
    height: auto;
    min-height: 48px;
    padding: var(--space-2) var(--space-3);
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  .reader-viewport {
    padding: var(--space-2);
  }
  .reader-watermark {
    font-size: 1.25rem;
  }
}