/* learn.css — LMS portal (S9a/S9b) + lesson video player (B19). Requires base.css. */
/* ==================== Learn portal (Session 9a) ==================== */

/* ---- Layout: sidebar + main ---- */
.learn-shell {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (min-width: 1024px) {
  .learn-shell {
    flex-direction: row;
    gap: 28px;
    align-items: flex-start;
  }
}

.learn-sidebar {
  position: sticky;
  top: 88px;
}

@media (max-width: 1023px) {
  .learn-sidebar {
    position: relative;
    top: 0;
    width: 100%;
  }
}

/* ---- Sidebar user mini card ---- */
.learn-user-card {
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 20px;
  padding: 14px 16px;
  margin-bottom: 12px;
}

@media (max-width: 1023px) {
  .learn-user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
  }
  .learn-user-card img {
    margin-bottom: 0 !important;
    flex-shrink: 0;
  }
}

/* ---- Sidebar courses list ---- */
.learn-sidebar-course-card {
  display: block;
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 16px;
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.15s ease;
  min-width: 200px;
}

.learn-sidebar-course-card:hover {
  border-color: #F2C5A5;
  background-color: #FEEFDD;
}

.learn-sidebar-course-card.is-active {
  border: 2px solid #FF4000;
  background-color: rgba(255, 64, 0, 0.05);
  padding: 11px 13px; /* compensate border-2 width */
}

/* ---- Progress bar mini (sidebar + continue card) ---- */
.learn-progress-mini {
  width: 100%;
  height: 4px;
  background-color: #F8DBC0;
  border-radius: 9999px;
  overflow: hidden;
}

.learn-progress-mini > div {
  height: 100%;
  background: linear-gradient(90deg, #FF4000 0%, #FAAA8D 100%);
  border-radius: 9999px;
  transition: width 0.4s ease;
}

/* ---- Dashboard sections ---- */
.learn-welcome {
  background: linear-gradient(135deg, rgba(255, 64, 0, 0.08) 0%, rgba(250, 170, 141, 0.1) 50%, #FEEFDD 100%);
  border: 1px solid #F8DBC0;
  border-radius: 24px;
  padding: 24px 28px;
}

.learn-streak-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 9999px;
  padding: 6px 14px;
  font-size: 13px;
  color: #4A4548;
  box-shadow: 0 2px 6px -2px rgba(255, 64, 0, 0.15);
}

.learn-continue-card {
  background-color: #FFFFFF;
  border: 2px solid rgba(255, 64, 0, 0.3);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 12px 32px -16px rgba(255, 64, 0, 0.2);
}

.learn-stat-card {
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 18px;
  padding: 16px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.learn-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px -10px rgba(250, 170, 141, 0.45);
}

.learn-section-heading {
  font-family: 'Be Vietnam Pro', system-ui, sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: #201E1F;
  margin-bottom: 14px;
  margin-top: 32px;
  letter-spacing: -0.01em;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .learn-sidebar-course-card,
  .learn-stat-card,
  .learn-progress-mini > div {
    transition: none !important;
  }
  .learn-stat-card:hover {
    transform: none !important;
  }
}

/* ==================== Course detail + Lesson player (Session 9b) ==================== */

/* ---- Breadcrumb ---- */
.learn-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #8E8588;
  margin-bottom: 16px;
}

.learn-breadcrumb a {
  color: #4A4548;
  transition: color 0.15s ease;
}

.learn-breadcrumb a:hover {
  color: #FF4000;
}

.learn-breadcrumb .sep {
  color: #C0B5A8;
}

.learn-breadcrumb .current {
  color: #201E1F;
  font-weight: 600;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---- Course header ---- */
.course-header {
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 24px;
  padding: 20px 24px;
  margin-bottom: 16px;
}

/* ---- Course tabs (Curriculum / Notes) ---- */
.course-tabs {
  display: inline-flex;
  gap: 4px;
  background-color: #FCE0CE;
  padding: 4px;
  border-radius: 9999px;
  margin-bottom: 16px;
}

.course-tab-btn {
  padding: 8px 18px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: #4A4548;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.course-tab-btn:hover:not(.is-active) {
  color: #201E1F;
}

.course-tab-btn.is-active {
  background-color: #FFFFFF;
  color: #FF4000;
  box-shadow: 0 1px 3px rgba(255, 64, 0, 0.15);
}

.course-tab-content[hidden] {
  display: none;
}

/* ---- Module accordion ---- */
.module-accordion {
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 16px;
  margin-bottom: 10px;
  overflow: hidden;
}

.module-accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  background-color: #FFFFFF;
  border: 0;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: background-color 0.2s ease;
}

.module-accordion-header:hover {
  background-color: #FEEFDD;
}

.module-accordion-header .chevron {
  transition: transform 0.2s ease;
  color: #8E8588;
  flex-shrink: 0;
}

.module-accordion[data-expanded="true"] .module-accordion-header .chevron {
  transform: rotate(90deg);
}

.module-accordion[data-expanded="true"] .module-accordion-header {
  background-color: #FEEFDD;
}

.module-accordion-body {
  border-top: 1px solid #F8DBC0;
  padding: 4px 0;
}

.module-accordion[data-expanded="false"] .module-accordion-body {
  display: none;
}

/* ---- Lesson row (3 status variants) ---- */
.lesson-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  font-size: 14px;
  color: #4A4548;
  cursor: pointer;
  border-left: 3px solid transparent;
  background: transparent;
  border-top: 0;
  border-right: 0;
  border-bottom: 0;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.lesson-row:hover {
  background-color: rgba(255, 64, 0, 0.04);
}

.lesson-row .lesson-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
  background-color: #F2C5A5;
  color: #FFFFFF;
  font-weight: 700;
}

.lesson-row .lesson-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-row .lesson-duration {
  font-size: 11px;
  color: #8E8588;
  flex-shrink: 0;
}

.lesson-row.is-completed .lesson-icon {
  background-color: #5BA85A;
  color: #FEEFDD;
}

.lesson-row.is-completed .lesson-name {
  color: #8E8588;
  text-decoration: line-through;
  text-decoration-color: rgba(91, 168, 90, 0.4);
}

.lesson-row.is-current {
  background-color: rgba(255, 64, 0, 0.08);
  border-left-color: #FF4000;
}

.lesson-row.is-current .lesson-icon {
  background-color: #FF4000;
  color: #FEEFDD;
}

.lesson-row.is-current .lesson-name {
  color: #201E1F;
  font-weight: 600;
}

/* ---- Notes textarea ---- */
.course-notes-textarea {
  width: 100%;
  min-height: 280px;
  padding: 16px;
  border-radius: 16px;
  background-color: #FFFFFF;
  border: 2px solid #F2C5A5;
  font-family: 'Be Vietnam Pro', system-ui, sans-serif;
  font-size: 14px;
  color: #201E1F;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.course-notes-textarea:focus {
  border-color: #FF4000;
  box-shadow: 0 0 0 3px rgba(255, 64, 0, 0.18);
}

.course-notes-textarea::placeholder {
  color: #B8AFA6;
}

.course-notes-status {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  font-size: 12px;
  color: #8E8588;
}

/* ---- Video placeholder (16:9) ---- */
.video-placeholder {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #201E1F 0%, #4A4548 100%);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  overflow: hidden;
  cursor: pointer;
}

.video-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255,64,0,0.2) 0%, transparent 60%);
}

.video-placeholder .play-icon {
  position: relative;
  z-index: 2;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: #FF4000;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FEEFDD;
  box-shadow: 0 8px 24px -8px rgba(255, 64, 0, 0.6);
  transition: transform 0.2s ease;
}

.video-placeholder:hover .play-icon {
  transform: scale(1.08);
}

.video-placeholder .placeholder-caption {
  position: absolute;
  bottom: 16px;
  left: 16px;
  z-index: 2;
  font-size: 11px;
  color: rgba(254, 239, 221, 0.7);
  font-weight: 500;
}

/* ---- Lesson nav footer (Prev / Mark complete / Next) ---- */
.lesson-nav-footer {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 20px;
  margin-top: 20px;
}

@media (min-width: 640px) {
  .lesson-nav-footer {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.lesson-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: #4A4548;
  background-color: #FEEFDD;
  border: 1px solid #F2C5A5;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
  text-decoration: none;
}

.lesson-nav-btn:hover:not(:disabled) {
  background-color: #FCE0CE;
  color: #201E1F;
  transform: translateY(-1px);
}

.lesson-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .module-accordion-header .chevron,
  .lesson-row,
  .video-placeholder .play-icon,
  .lesson-nav-btn,
  .course-notes-textarea {
    transition: none !important;
  }
  .video-placeholder:hover .play-icon,
  .lesson-nav-btn:hover {
    transform: none !important;
  }
}


/* =============================================================================
   B19 — Lesson video frame (16:9 aspect, rounded, replaces .video-placeholder)
   ============================================================================= */

.video-placeholder.has-video {
  cursor: default;
  background: transparent;
  padding: 0;
  border: none;
}

.video-placeholder.is-loading {
  opacity: 0.6;
}

.lesson-video-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 24px;
  border: 1px solid #F8DBC0;
  background: #000;
  display: block;
}

/* =============================================================================
   Custom lesson video player — ẩn logo YouTube/Vimeo native UI, chỉ controls
   tự build (play/pause + volume). Read-only progress bar (không seek).
   Anti-download cơ bản: chặn right-click, controlsList=nodownload, blocker overlay.
   ============================================================================= */

.lesson-player-shell {
  position: relative;
  width: 100%;
  border-radius: 24px;
  overflow: hidden;
  background: #000;
  border: 1px solid #F8DBC0;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.lesson-player-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
}

.lesson-player-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: #000;
}

/* Blocker overlay: chặn click trực tiếp lên iframe (không cho YT/Vimeo native action),
   click → toggle play/pause qua API (giúp UX click-anywhere-to-pause vẫn còn). */
.lesson-player-blocker {
  position: absolute;
  inset: 0;
  z-index: 10;
  cursor: pointer;
  background: transparent;
}

.lesson-player-controls {
  background: linear-gradient(to top, rgba(0, 0, 0, 0.92), rgba(0, 0, 0, 0.78));
  padding: 12px 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lesson-player-progress {
  position: relative;
  height: 4px;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 2px;
  overflow: hidden;
  pointer-events: none;
}

.lesson-player-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #FAAA8D 0%, #FF4000 100%);
  border-radius: 2px;
  transition: width 240ms linear;
}

.lesson-player-controls-row {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #FEEFDD;
}

.lesson-player-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #FEEFDD;
  border: 0;
  cursor: pointer;
  transition: background 150ms ease, transform 150ms ease;
  padding: 0;
}

.lesson-player-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: scale(1.05);
}

.lesson-player-btn[data-player-toggle] {
  background: #FF4000;
  width: 44px;
  height: 44px;
  box-shadow: 0 4px 12px -2px rgba(255, 64, 0, 0.45);
}

.lesson-player-btn[data-player-toggle]:hover {
  background: #E63A00;
}

.lesson-player-vol-display {
  font-size: 12px;
  font-weight: 700;
  width: 44px;
  text-align: center;
  color: #FEEFDD;
  font-variant-numeric: tabular-nums;
}

.lesson-player-time {
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  margin-left: auto;
  color: rgba(254, 239, 221, 0.85);
}

@media (max-width: 480px) {
  .lesson-player-controls { padding: 10px 12px; }
  .lesson-player-controls-row { gap: 8px; }
  .lesson-player-btn { width: 32px; height: 32px; }
  .lesson-player-btn[data-player-toggle] { width: 38px; height: 38px; }
  .lesson-player-vol-display { width: 36px; font-size: 11px; }
  .lesson-player-time { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-player-btn,
  .lesson-player-progress-fill { transition: none !important; }
}


/* ---- Shared from account region: order status badge + course mini card (learn dashboard reuses) ---- */
/* ---- Order status badge (3 variants) ---- */
.order-status-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.order-status-badge.is-completed {
  background-color: rgba(91, 168, 90, 0.15);
  color: #3F7E3F;
}

.order-status-badge.is-processing {
  background-color: rgba(250, 170, 141, 0.25);
  color: #B25E3E;
}

.order-status-badge.is-cancelled {
  background-color: rgba(142, 133, 136, 0.15);
  color: #6B6366;
}

/* ---- Course mini card ---- */
.course-mini-card {
  background-color: #FFFFFF;
  border-radius: 24px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.course-mini-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -16px rgba(250, 170, 141, 0.5);
}

.course-mini-cover {
  height: 140px;
  position: relative;
  overflow: hidden;
}

.course-mini-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.08) 100%);
}

.course-progress-bar {
  width: 100%;
  height: 6px;
  background-color: #F8DBC0;
  border-radius: 9999px;
  overflow: hidden;
}

.course-progress-bar > div {
  height: 100%;
  background: linear-gradient(90deg, #FF4000 0%, #FAAA8D 100%);
  border-radius: 9999px;
  transition: width 0.4s ease;
}

@media (prefers-reduced-motion: reduce) {
  .course-mini-card, .course-progress-bar > div { transition: none !important; }
}


/* =============================================================================
   T4 — API-driven redesign: free/paid badges, explore cards, paywall,
   responsive video embed, lesson content, attachments, locked lessons.
   ============================================================================= */

/* ---- Free / Paid badges ---- */
.course-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
  line-height: 1.6;
}
.course-badge--free {
  background-color: rgba(91, 168, 90, 0.16);
  color: #3F7E3F;
}
.course-badge--paid {
  background-color: rgba(255, 64, 0, 0.12);
  color: #C73000;
}

/* ---- Responsive 16:9 video embed (YouTube / Vimeo / mp4) ---- */
.lesson-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 24px;
  overflow: hidden;
  background: #000;
  border: 1px solid #F8DBC0;
  box-shadow: 0 16px 40px -20px rgba(32, 30, 31, 0.4);
}
.lesson-embed iframe,
.lesson-embed video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: #000;
}

/* ---- Explore cards (dashboard "Khám phá thêm khóa học") ---- */
.explore-card {
  display: flex;
  flex-direction: column;
  background-color: #FFFFFF;
  border: 1px solid #F8DBC0;
  border-radius: 20px;
  overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}
.explore-card:hover {
  transform: translateY(-3px);
  border-color: #F2C5A5;
  box-shadow: 0 18px 36px -20px rgba(250, 170, 141, 0.6);
}
.explore-cover {
  height: 108px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 46px;
  filter: drop-shadow(0 6px 10px rgba(0, 0, 0, 0.15));
}
.explore-body {
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.explore-btn {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 10px 16px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background-color 0.2s ease, color 0.2s ease;
  text-decoration: none;
}
.explore-btn:hover:not(:disabled) { transform: translateY(-1px); }
.explore-btn:disabled { opacity: 0.65; cursor: default; }
.explore-btn--primary {
  background-color: #201E1F;
  color: #FEEFDD;
}
.explore-btn--primary:hover:not(:disabled) { background-color: #000; }
.explore-btn--ghost {
  background-color: #FEEFDD;
  border-color: #F2C5A5;
  color: #201E1F;
}
.explore-btn--ghost:hover { background-color: #FCE0CE; }

/* ---- Course detail action zone: enroll + paywall ---- */
.course-action { margin-top: 16px; }

.paywall {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 16px 18px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255, 64, 0, 0.08), rgba(250, 170, 141, 0.12));
  border: 1px solid rgba(255, 64, 0, 0.25);
}
.paywall-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background-color: rgba(255, 64, 0, 0.14);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.paywall-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
@media (max-width: 520px) {
  .paywall-actions, .paywall-actions a { width: 100%; }
  .paywall-actions a { justify-content: center; }
}

/* ---- Locked lesson row ---- */
.lesson-row.is-locked {
  cursor: not-allowed;
  opacity: 0.72;
}
.lesson-row.is-locked:hover { background-color: transparent; }
.lesson-row.is-locked .lesson-icon {
  background-color: #EAD9C6;
  color: #8E8588;
  font-size: 12px;
}
.lesson-row.is-locked .lesson-name { color: #8E8588; }

/* ---- Lesson content (prose) ---- */
.lesson-content {
  font-size: 14px;
  line-height: 1.75;
  color: #4A4548;
}
.lesson-content p { margin-bottom: 12px; }
.lesson-content h2, .lesson-content h3 {
  font-family: 'Be Vietnam Pro', system-ui, sans-serif;
  font-weight: 700;
  color: #201E1F;
  margin: 18px 0 8px;
}
.lesson-content h2 { font-size: 18px; }
.lesson-content h3 { font-size: 16px; }
.lesson-content ul, .lesson-content ol { margin: 0 0 12px 20px; }
.lesson-content li { margin-bottom: 4px; }
.lesson-content a { color: #FF4000; text-decoration: underline; }
.lesson-content img { max-width: 100%; border-radius: 12px; }
.lesson-content strong { color: #201E1F; }

/* ---- Lesson attachments ---- */
.lesson-att-heading {
  font-family: 'Be Vietnam Pro', system-ui, sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: #201E1F;
  margin: 20px 0 10px;
}
.lesson-att-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.lesson-att-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  background-color: #FEEFDD;
  border: 1px solid #F2C5A5;
  font-size: 13px;
  color: #201E1F;
  text-decoration: none;
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.lesson-att-item:hover { background-color: #FCE0CE; transform: translateX(2px); }

/* ---- Empty + skeleton states ---- */
.learn-empty {
  background-color: #FFFFFF;
  border: 1px dashed #F2C5A5;
  border-radius: 20px;
  padding: 28px;
  text-align: center;
}
.learn-skeleton {
  height: 220px;
  border-radius: 24px;
  background: linear-gradient(100deg, #FCE0CE 30%, #FEEFDD 50%, #FCE0CE 70%);
  background-size: 200% 100%;
  animation: learnShimmer 1.3s ease-in-out infinite;
}
@keyframes learnShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .explore-card, .explore-btn, .lesson-att-item { transition: none !important; }
  .explore-card:hover, .explore-btn:hover, .lesson-att-item:hover { transform: none !important; }
  .learn-skeleton { animation: none !important; }
}