/* Styles dédiés à la page individuelle Apprendre (Coursera-like Learning Platform & Drives par Semestre) */

/* Header & Banner Apprendre */
.learn-header {
  background: linear-gradient(135deg, #0B2447 0%, #133E68 50%, #1B6B82 100%);
  color: #fff;
  padding: 60px 0 50px;
  position: relative;
  overflow: hidden;
}

.learn-header::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 45px solid rgba(28, 200, 216, 0.15);
  pointer-events: none;
}

.learn-header .tagline {
  display: inline-block;
  background: rgba(28, 200, 216, 0.2);
  color: #55e6f5;
  border: 1px solid rgba(28, 200, 216, 0.4);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.learn-header h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  margin-bottom: 12px;
  color: #ffffff;
}

.learn-header p {
  max-width: 68ch;
  color: #c7dbe8;
  font-size: 1.1rem;
  margin-bottom: 24px;
}

.nav-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-anchors a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  transition: all 0.2s ease;
}

.nav-anchors a:hover {
  background: #ffffff;
  color: var(--navy);
  transform: translateY(-2px);
}

.nav-anchors a.highlight {
  background: var(--cyan);
  color: var(--navy);
  border-color: var(--cyan);
  font-weight: 700;
}

.nav-anchors a.highlight:hover {
  background: #39e3f3;
  color: var(--navy);
}

/* SECTION 1: GOOGLE DRIVE MASTERS PAR SEMESTRE */
.drive-section {
  padding: 60px 0;
  background: #f8fbfe;
  border-bottom: 1px solid var(--line);
}

.section-head {
  margin-bottom: 30px;
}

.section-badge {
  color: var(--teal);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 6px;
  display: block;
}

/* Filtres de semestres */
.semester-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  padding: 12px 18px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.semester-filter-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
  margin-right: 6px;
}

.sem-btn {
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f8fbfe;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.sem-btn:hover {
  border-color: var(--teal);
  color: var(--navy);
}

.sem-btn.active {
  background: var(--navy);
  border-color: var(--navy);
  color: #ffffff;
}

.drive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 28px;
}

.master-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(16, 43, 78, 0.05);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.master-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(16, 43, 78, 0.09);
}

.master-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 28px;
  right: 28px;
  height: 5px;
  border-radius: 0 0 4px 4px;
}

.master-card.sdsi::before {
  background: linear-gradient(90deg, #1B6B82, #1CC8D8);
}

.master-card.miate::before {
  background: linear-gradient(90deg, #2F5FE3, #725fed);
}

.master-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  padding-top: 6px;
}

.master-acronym {
  font-size: 2rem;
  font-weight: 800;
  font-family: Sora, Inter, sans-serif;
  color: var(--navy);
  line-height: 1;
}

.master-badge {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  background: #e9f4f8;
  color: var(--teal);
  border: 1px solid #d0e7f1;
}

.master-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 10px;
}

.master-desc {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.semesters-container {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
  flex-grow: 1;
}

.semester-box {
  background: #f4f8fb;
  border: 1px solid #e2edf5;
  border-radius: 14px;
  padding: 14px 16px;
  transition: all 0.2s ease;
}

.semester-box.highlighted {
  border-color: var(--teal);
  background: #ebf5fa;
}

.semester-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.semester-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 8px;
}

.semester-title span.sem-pill {
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--navy);
  color: #fff;
  padding: 2px 8px;
  border-radius: 6px;
}

.semester-drive-link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.semester-drive-link:hover {
  text-decoration: underline;
}

.semester-modules {
  font-size: 0.82rem;
  color: #435e76;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.mod-pill {
  background: #ffffff;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid #dce9f2;
}

.semester-sublinks {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 8px;
  border-top: 1px dashed #d5e5f0;
}

.semester-sublinks a {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--teal);
  background: #ffffff;
  border: 1px solid #cfe0ec;
  padding: 3px 9px;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.semester-sublinks a:hover {
  background: var(--teal);
  color: #ffffff;
}

.drive-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

.btn-drive {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-drive.primary {
  background: #0B2447;
  color: #ffffff;
}

.btn-drive.primary:hover {
  background: #174278;
}

.btn-drive.sub {
  background: #eaf3f8;
  color: #17546e;
  border: 1px solid #d2e4ee;
  font-size: 0.88rem;
  padding: 9px 14px;
}

.btn-drive.sub:hover {
  background: #dbeef7;
  color: #0b2447;
}

.drive-info-alert {
  margin-top: 35px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--cyan);
  border-radius: 12px;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.drive-info-alert p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.drive-info-alert strong {
  color: var(--navy);
}

/* SECTION 2: PLATEFORME VIDÉO COURSERA-STYLE (YOUTUBE EMBED) */
.platform-section {
  padding: 70px 0;
  background: #ffffff;
}

.courses-tabs-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 25px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.track-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f7fafd;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.track-btn:hover {
  border-color: var(--teal);
  color: var(--navy);
}

.track-btn.active {
  background: var(--navy);
  border-color: var(--navy);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(11, 36, 71, 0.18);
}

/* Container de la plateforme */
.coursera-container {
  display: grid;
  grid-template-columns: 1fr 390px;
  gap: 26px;
  background: #fbfdff;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 16px 45px rgba(16, 43, 78, 0.07);
}

/* Colonne Gauche : Vidéo YouTube, Chapitre & Onglets */
.player-column {
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.video-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* Ratio 16:9 */
  background: #000000;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-meta {
  margin-top: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.meta-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.tag-badge {
  font-size: 0.76rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  text-transform: uppercase;
}

.tag-badge.track {
  background: #e6f4f8;
  color: var(--teal);
}

.tag-badge.chapter {
  background: #0B2447;
  color: #ffffff;
}

.tag-badge.duration {
  background: #f0f3f6;
  color: var(--muted);
}

.tag-badge.level {
  background: #eef7ee;
  color: #278838;
}

.video-meta h2 {
  font-size: 1.45rem;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.3;
}

.video-meta h2::after {
  display: none;
}

.instructor-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.instructor-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.instructor-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--grad);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}

.instructor-text {
  font-size: 0.88rem;
}

.instructor-name {
  font-weight: 600;
  color: var(--navy);
  display: block;
}

.instructor-sub {
  font-size: 0.78rem;
  color: var(--muted);
}

.player-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #ffffff;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  transition: all 0.15s ease;
}

.action-btn:hover {
  background: #f2f7fb;
  border-color: var(--teal);
}

.action-btn.completed {
  background: #eafaf1;
  border-color: #27ae60;
  color: #219653;
}

/* Onglets sous le lecteur */
.lesson-tabs {
  margin-top: 24px;
}

.tab-headers {
  display: flex;
  border-bottom: 2px solid var(--line);
  gap: 20px;
}

.tab-nav-btn {
  background: none;
  border: none;
  padding: 10px 4px;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  position: relative;
  transition: color 0.15s ease;
}

.tab-nav-btn:hover {
  color: var(--navy);
}

.tab-nav-btn.active {
  color: var(--blue);
}

.tab-nav-btn.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--blue);
}

.tab-content {
  padding: 20px 4px 10px;
  font-size: 0.94rem;
  color: #3b5266;
  line-height: 1.65;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.resource-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.resource-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.resource-item a {
  color: var(--blue);
  font-weight: 600;
  font-size: 0.9rem;
}

.resource-item a:hover {
  text-decoration: underline;
}

/* Colonne Droite : Chapitres Vidéo & Modules du cours */
.syllabus-column {
  background: #f5f9fc;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}

.syllabus-header {
  padding: 20px;
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.syllabus-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.progress-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
}

.progress-bar-bg {
  width: 100%;
  height: 7px;
  background: #e2ecf3;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
  width: 0%;
  border-radius: 999px;
  transition: width 0.3s ease;
}

.modules-list {
  padding: 16px;
  overflow-y: auto;
  max-height: 600px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.module-box {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.module-head {
  padding: 12px 16px;
  background: #fcfdfe;
  border-bottom: 1px solid #edf4f8;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.module-head span.badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teal);
  background: #ebf5f9;
  padding: 2px 8px;
  border-radius: 999px;
}

.lesson-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lesson-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  font-size: 0.86rem;
  color: var(--text);
  border-bottom: 1px solid #f2f7fa;
  cursor: pointer;
  transition: background 0.15s ease;
}

.lesson-item:last-child {
  border-bottom: none;
}

.lesson-item:hover {
  background: #f2f8fc;
}

.lesson-item.active {
  background: #e9f4fa;
  color: var(--blue);
  font-weight: 600;
  border-left: 4px solid var(--blue);
  padding-left: 12px;
}

.lesson-info {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.lesson-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  background: #eef4f8;
  color: var(--muted);
}

.lesson-item.active .lesson-icon {
  background: var(--blue);
  color: #fff;
}

.lesson-item.done .lesson-icon {
  background: #27ae60;
  color: #fff;
}

.lesson-title-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-duration {
  font-size: 0.76rem;
  color: var(--muted);
  flex-shrink: 0;
  margin-left: 8px;
}

/* SECTION 3: AUTRES FORMATIONS & CHAÎNES RECOMMANDÉES */
.catalog-section {
  padding: 60px 0;
  background: #f8fbfe;
  border-top: 1px solid var(--line);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.course-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(11, 36, 71, 0.04);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(11, 36, 71, 0.08);
}

.course-thumb {
  height: 160px;
  position: relative;
  overflow: hidden;
}

.course-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.course-card:hover .course-thumb img {
  transform: scale(1.04);
}

.course-thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(11, 36, 71, 0.85) 100%);
  display: flex;
  align-items: flex-end;
  padding: 12px 16px;
}

.thumb-tag {
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  padding: 3px 8px;
  border-radius: 6px;
}

.course-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-provider {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 6px;
}

.course-body h3 {
  font-size: 1.15rem;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.35;
}

.course-body p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 16px;
}

.course-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid #edf4f8;
}

.btn-start-course {
  margin-top: 14px;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--teal);
  background: #ffffff;
  color: var(--teal);
  font-size: 0.88rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-start-course:hover {
  background: var(--teal);
  color: #ffffff;
}

/* Responsive */
@media (max-width: 980px) {
  .coursera-container {
    grid-template-columns: 1fr;
  }
  .syllabus-column {
    border-left: none;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .drive-grid {
    grid-template-columns: 1fr;
  }
  .courses-grid {
    grid-template-columns: 1fr;
  }
  .player-column {
    padding: 14px;
  }
}