/* ═══════════════════════════════════════════════════════════
   StudyPlatform — Public Stylesheet
   ═══════════════════════════════════════════════════════════ */

/* ── Reset & Base ────────────────────────────────────────── */
.sp-wrap *,
.sp-wrap *::before,
.sp-wrap *::after { box-sizing: border-box; margin: 0; padding: 0; }

.sp-wrap {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  font-size: 15px;
  color: #1f2937;
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px;
  line-height: 1.6;
}

/* ── Buttons ─────────────────────────────────────────────── */
.sp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background .2s, transform .15s, box-shadow .2s;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}
.sp-btn:focus-visible {
  outline: 3px solid #4F46E5;
  outline-offset: 2px;
}
.sp-btn-primary {
  background: #4F46E5;
  color: #fff;
  box-shadow: 0 2px 8px #4F46E533;
}
.sp-btn-primary:hover {
  background: #4338CA;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px #4F46E544;
}
.sp-btn-secondary {
  background: #f3f4f6;
  color: #374151;
  border: 1px solid #e5e7eb;
}
.sp-btn-secondary:hover {
  background: #e5e7eb;
  color: #111827;
}
.sp-btn-danger {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}
.sp-btn-danger:hover {
  background: #fecaca;
  color: #7f1d1d;
}
.sp-btn-sm {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 6px;
}
.sp-btn-xs {
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 6px;
}
.sp-btn:disabled,
.sp-btn[disabled] {
  opacity: .5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}
.sp-icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  padding: 5px 7px;
  border-radius: 6px;
  line-height: 1;
  transition: background .2s;
}
.sp-icon-btn:hover { background: #f3f4f6; }

/* ── Forms ───────────────────────────────────────────────── */
.sp-form-group {
  margin-bottom: 18px;
}
.sp-form-group label {
  display: block;
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 6px;
  color: #374151;
}
.sp-input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
  color: #1f2937;
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
  appearance: none;
}
.sp-input:focus {
  outline: none;
  border-color: #4F46E5;
  box-shadow: 0 0 0 3px #4F46E522;
}
.sp-input-sm  { width: 90px; }
.sp-input-md  { width: 200px; }
.sp-hint {
  font-size: 12px;
  color: #9ca3af;
  margin-top: 5px;
}
.sp-required { color: #ef4444; }

/* ── Notices ─────────────────────────────────────────────── */
.sp-notice {
  padding: 12px 18px;
  border-radius: 8px;
  margin-bottom: 18px;
  font-size: 14px;
  font-weight: 500;
}
.sp-notice.success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}
.sp-notice.error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}
.sp-notice.info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #93c5fd;
}
.sp-notice.warning {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

/* ── Spinner ─────────────────────────────────────────────── */
.sp-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid #e5e7eb;
  border-top-color: #4F46E5;
  border-radius: 50%;
  animation: sp-spin .7s linear infinite;
  margin: 0 auto 12px;
}
@keyframes sp-spin { to { transform: rotate(360deg); } }

.sp-loading-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  color: #6b7280;
}

/* ── Modal ───────────────────────────────────────────────── */
.sp-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  backdrop-filter: blur(3px);
}
.sp-modal-inner {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  width: 560px;
  max-width: 100%;
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,.22);
  animation: sp-modal-in .2s ease;
}
@keyframes sp-modal-in {
  from { opacity: 0; transform: translateY(16px) scale(.97); }
  to   { opacity: 1; transform: translateY(0)   scale(1); }
}
.sp-modal-inner h2 {
  margin: 0 0 22px;
  font-size: 20px;
  font-weight: 700;
}
.sp-modal-footer {
  display: flex;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid #e5e7eb;
}

/* ── Empty State ─────────────────────────────────────────── */
.sp-empty-state {
  text-align: center;
  padding: 64px 24px;
  color: #9ca3af;
}
.sp-empty-icon { font-size: 56px; margin-bottom: 16px; }
.sp-empty-state h3 { font-size: 20px; color: #374151; margin-bottom: 8px; }
.sp-empty-state p  { font-size: 14px; margin-bottom: 20px; }

/* ── Progress Bar ────────────────────────────────────────── */
.sp-progress-bar-wrap {
  background: #e5e7eb;
  border-radius: 99px;
  height: 8px;
  overflow: hidden;
}
.sp-progress-bar {
  background: var(--course-color, #4F46E5);
  height: 100%;
  border-radius: 99px;
  transition: width .5s ease;
  min-width: 2px;
}

/* ── Status Pills ────────────────────────────────────────── */
.sp-status-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: capitalize;
}
.sp-status-pill.sp-status-completed    { background: #d1fae5; color: #065f46; }
.sp-status-pill.sp-status-in_progress  { background: #dbeafe; color: #1e40af; }
.sp-status-pill.sp-status-not_started  { background: #f3f4f6; color: #6b7280; }

/* ══════════════════════════════════════════════════════════
   STUDENT DASHBOARD
   ══════════════════════════════════════════════════════════ */

/* Header Banner */
.sp-dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 32px;
  padding: 28px 32px;
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  border-radius: 20px;
  color: #fff;
  box-shadow: 0 8px 32px #4F46E544;
}
.sp-welcome h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
  color: #fff;
}
.sp-welcome p { opacity: .85; font-size: 14px; }

/* Header Stats */
.sp-header-stats { display: flex; gap: 28px; flex-wrap: wrap; }
.sp-header-stat  { text-align: center; }
.sp-stat-num {
  display: block;
  font-size: 30px;
  font-weight: 800;
  line-height: 1.1;
}
.sp-stat-lbl { font-size: 11px; opacity: .75; text-transform: uppercase; letter-spacing: .5px; }

/* Section Headings */
#sp-student-dashboard h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 14px;
  color: #111827;
  padding-bottom: 8px;
  border-bottom: 2px solid #f3f4f6;
}

/* Course Progress Grid */
.sp-course-progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.sp-progress-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 20px;
  border-top: 4px solid var(--course-color, #4F46E5);
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
  transition: box-shadow .2s, transform .2s;
}
.sp-progress-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,.1);
  transform: translateY(-2px);
}
.sp-progress-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.sp-progress-card-header h4 {
  font-size: 15px;
  font-weight: 700;
  color: #111827;
}
.sp-pct-badge {
  background: var(--course-color, #4F46E5);
  color: #fff;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}
.sp-progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: #6b7280;
  margin-top: 8px;
}

/* Activity List */
.sp-activity-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
}
.sp-activity-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 14px 18px;
  transition: box-shadow .2s;
}
.sp-activity-item:hover { box-shadow: 0 2px 10px rgba(0,0,0,.07); }
.sp-activity-icon { font-size: 26px; flex-shrink: 0; }
.sp-activity-body { flex: 1; min-width: 0; }
.sp-activity-body strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sp-activity-body span { font-size: 12px; color: #6b7280; }
.sp-activity-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}
.sp-activity-time { font-size: 11px; color: #9ca3af; }

/* Dashboard Actions */
.sp-dashboard-actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ══════════════════════════════════════════════════════════
   COURSE VIEW
   ══════════════════════════════════════════════════════════ */

/* Top Bar */
.sp-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.sp-topbar h2 { font-size: 22px; font-weight: 700; color: #111827; }

/* Courses Grid */
.sp-courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

/* Course Card */
.sp-course-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 22px;
  border-top: 5px solid var(--course-color, #4F46E5);
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
  transition: box-shadow .2s, transform .2s;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sp-course-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,.1);
  transform: translateY(-3px);
}
.sp-course-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.sp-course-icon { font-size: 32px; }
.sp-course-card-actions { display: flex; gap: 4px; }
.sp-course-title {
  font-size: 16px;
  font-weight: 700;
  color: #111827;
  line-height: 1.3;
}
.sp-course-desc {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sp-course-meta {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: #6b7280;
}
.sp-course-progress-mini {
  margin: 4px 0;
}
.sp-course-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid #f3f4f6;
}
.sp-progress-label { font-size: 12px; color: #6b7280; font-weight: 500; }

/* Color Picker */
.sp-color-picker { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.sp-color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: transform .15s, border-color .15s;
}
.sp-color-swatch:hover  { transform: scale(1.2); }
.sp-color-swatch.active { border-color: #1f2937; transform: scale(1.15); }

/* Type Tabs */
.sp-type-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.sp-type-tab {
  padding: 6px 14px;
  border: 1.5px solid #d1d5db;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  background: #fff;
  color: #374151;
  transition: all .2s;
}
.sp-type-tab:hover  { border-color: #4F46E5; color: #4F46E5; }
.sp-type-tab.active { background: #4F46E5; color: #fff; border-color: #4F46E5; }

/* File Drop Zone */
.sp-file-drop-zone {
  border: 2px dashed #d1d5db;
  border-radius: 12px;
  padding: 32px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  position: relative;
}
.sp-file-drop-zone:hover,
.sp-file-drop-zone.drag-over {
  border-color: #4F46E5;
  background: #f5f3ff;
}
.sp-file-drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.sp-drop-label span { font-size: 36px; display: block; margin-bottom: 8px; }
.sp-drop-label p    { font-size: 14px; color: #374151; font-weight: 500; margin-bottom: 4px; }
.sp-drop-label small { font-size: 12px; color: #9ca3af; }
.sp-file-info {
  background: #f0fdf4;
  border: 1px solid #a7f3d0;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  color: #065f46;
  margin-top: 8px;
}

/* Page Range */
.sp-page-range {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}
.sp-range-sep { font-size: 18px; color: #9ca3af; padding-bottom: 8px; }

/* Upload Progress */
#sp-upload-progress { margin-top: 16px; }
#sp-upload-progress .sp-progress-bar-wrap { height: 10px; margin-bottom: 8px; }
#sp-upload-status { font-size: 13px; color: #6b7280; text-align: center; }

/* Course Panel */
.sp-course-panel {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 4px 20px rgba(0,0,0,.07);
}
.sp-panel-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.sp-panel-header h2 { flex: 1; font-size: 20px; font-weight: 700; }
.sp-back-btn {
  background: none;
  border: none;
  color: #4F46E5;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 0;
  text-decoration: none;
  transition: opacity .2s;
}
.sp-back-btn:hover { opacity: .7; }

/* Materials List */
.sp-materials-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}
.sp-material-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 14px 16px;
  transition: box-shadow .2s;
}
.sp-material-item:hover { box-shadow: 0 2px 10px rgba(0,0,0,.07); }
.sp-material-icon { font-size: 24px; flex-shrink: 0; }
.sp-material-body { flex: 1; min-width: 0; }
.sp-material-body strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sp-material-body span { font-size: 12px; color: #6b7280; }
.sp-material-actions { display: flex; gap: 6px; flex-shrink: 0; }
.sp-material-status {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
}
.sp-material-status.pending    { background: #fef3c7; color: #92400e; }
.sp-material-status.processing { background: #dbeafe; color: #1e40af; }
.sp-material-status.done       { background: #d1fae5; color: #065f46; }
.sp-material-status.error      { background: #fee2e2; color: #991b1b; }

/* Chapters List */
.sp-chapters-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.sp-chapter-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 18px;
  cursor: pointer;
  transition: box-shadow .2s, transform .2s, border-color .2s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.sp-chapter-card:hover {
  box-shadow: 0 4px 16px rgba(79,70,229,.15);
  border-color: #4F46E5;
  transform: translateY(-2px);
}
.sp-chapter-card.completed { border-left: 4px solid #10B981; }
.sp-chapter-card.in_progress { border-left: 4px solid #4F46E5; }
.sp-chapter-num {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: #9ca3af;
  margin-bottom: 6px;
}
.sp-chapter-title {
  font-size: 14px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 10px;
  line-height: 1.4;
}
.sp-chapter-meta {
  font-size: 12px;
  color: #6b7280;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.sp-chapter-progress-mini { margin-top: 8px; }
.sp-chapter-progress-mini .sp-progress-bar-wrap { height: 4px; }

/* ══════════════════════════════════════════════════════════
   CHAPTER READER
   ══════════════════════════════════════════════════════════ */

.sp-reader-wrap { max-width: 860px; }

/* Reader Header */
.sp-reader-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid #e5e7eb;
}
.sp-reader-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #6b7280;
}
.sp-reader-breadcrumb a {
  color: #4F46E5;
  text-decoration: none;
  font-weight: 500;
}
.sp-reader-breadcrumb a:hover { text-decoration: underline; }
.sp-reader-breadcrumb span:last-child { color: #111827; font-weight: 600; }
.sp-reader-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.sp-reader-progress-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: #4F46E5;
}
.sp-reader-bar-wrap { width: 120px; }

/* Page Navigation */
.sp-reader-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
  padding: 14px 20px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
}
.sp-page-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #374151;
}
.sp-page-indicator input {
  width: 60px;
  text-align: center;
  padding: 6px 8px;
  border: 1.5px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
}
.sp-page-indicator input:focus {
  outline: none;
  border-color: #4F46E5;
}

/* Reader Content */
.sp-reader-content {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 36px 44px;
  min-height: 480px;
  line-height: 1.85;
  font-size: 16px;
  color: #1f2937;
  box-shadow: 0 2px 12px rgba(0,0,0,.05);
  margin-bottom: 20px;
  position: relative;
}
.sp-reader-content h1,
.sp-reader-content h2,
.sp-reader-content h3 {
  margin: 1.2em 0 .6em;
  line-height: 1.3;
  color: #111827;
}
.sp-reader-content p  { margin-bottom: 1em; }
.sp-reader-content ul,
.sp-reader-content ol { margin: .8em 0 .8em 1.5em; }
.sp-reader-content li { margin-bottom: .4em; }
.sp-reader-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
}
.sp-page-text { white-space: pre-wrap; word-wrap: break-word; }
.sp-page-unavailable {
  text-align: center;
  color: #9ca3af;
  padding: 60px 20px;
}
.sp-page-unavailable .sp-unavailable-icon { font-size: 48px; margin-bottom: 12px; }

/* TTS Controls */
.sp-tts-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  background: #f0fdf4;
  border: 1px solid #a7f3d0;
  border-radius: 10px;
  padding: 12px 18px;
  margin-bottom: 20px;
  font-size: 13px;
}
.sp-tts-controls button {
  background: #10B981;
  color: #fff;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: background .2s;
}
.sp-tts-controls button:hover { background: #059669; }
.sp-tts-controls label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #065f46;
  font-weight: 500;
}
.sp-tts-controls input[type="range"] { width: 100px; cursor: pointer; }
#sp-tts-rate-val { font-weight: 700; min-width: 26px; }

/* Reader Sidebar — Page Dots */
.sp-reader-sidebar {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 18px 20px;
  margin-top: 20px;
}
.sp-reader-sidebar h4 {
  font-size: 13px;
  font-weight: 700;
  color: #374151;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.sp-page-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.sp-page-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #d1d5db;
  cursor: pointer;
  transition: background .2s, transform .15s;
  display: inline-block;
}
.sp-page-dot:hover { transform: scale(1.3); background: #9ca3af; }
.sp-page-dot.done  { background: #10B981; }
.sp-page-dot.current { background: #4F46E5; transform: scale(1.2); }

/* ══════════════════════════════════════════════════════════
   LOGIN PROMPT
   ══════════════════════════════════════════════════════════ */
.sp-login-prompt {
  text-align: center;
  padding: 48px 24px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
}
.sp-login-prompt a { color: #4F46E5; font-weight: 600; }

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .sp-dashboard-header { flex-direction: column; padding: 22px; }
  .sp-header-stats     { justify-content: space-around; width: 100%; }
  .sp-courses-grid     { grid-template-columns: 1fr; }
  .sp-course-progress-grid { grid-template-columns: 1fr; }
  .sp-reader-content   { padding: 22px 18px; font-size: 15px; }
  .sp-reader-nav       { gap: 10px; }
  .sp-modal-inner      { padding: 22px 18px; }
  .sp-panel-header     { flex-direction: column; align-items: flex-start; }
  .sp-chapters-list    { grid-template-columns: 1fr; }
  .sp-type-tabs        { gap: 4px; }
  .sp-type-tab         { padding: 5px 10px; font-size: 12px; }
}

@media (max-width: 480px) {
  .sp-wrap             { padding: 16px 12px; }
  .sp-topbar           { flex-direction: column; align-items: flex-start; }
  .sp-reader-header    { flex-direction: column; align-items: flex-start; }
  .sp-reader-nav       { flex-wrap: wrap; justify-content: center; }
  .sp-stat-num         { font-size: 22px; }
  .sp-tts-controls     { flex-direction: column; align-items: flex-start; }
}