/* ═══════════════════════════════════════════
   Courses Module — Complete Styling
   Dark theme + NWM branding (navy #010F3B, orange #FF671F)
   ═══════════════════════════════════════════ */

/* ── Stats Strip ── */
.courses-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.courses-stat {
  background: linear-gradient(135deg, rgba(255, 103, 31, 0.08), rgba(1, 15, 59, 0.12));
  border: 1px solid rgba(255, 103, 31, 0.20);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.courses-stat:hover {
  background: linear-gradient(135deg, rgba(255, 103, 31, 0.12), rgba(1, 15, 59, 0.16));
  border-color: rgba(255, 103, 31, 0.35);
  transform: translateY(-2px);
}

.courses-stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--nwm-orange, #FF671F);
}

.courses-stat-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-dim, #8b8fa3);
  display: block;
}

.courses-stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text, #e4e7ec);
  font-family: 'Poppins', sans-serif;
  line-height: 1;
}

/* ── Search & Toolbar ── */
.courses-toolbar {
  margin-bottom: 24px;
}

.course-search {
  width: 100%;
  max-width: 400px;
  padding: 10px 14px;
  background: var(--bg-input, #141620);
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 8px;
  color: var(--text, #e4e7ec);
  font-size: 14px;
  font-family: inherit;
  transition: all 0.2s ease;
}

.course-search::placeholder {
  color: var(--text-muted, #5a5e70);
}

.course-search:focus {
  outline: none;
  border-color: var(--nwm-orange, #FF671F);
  background: var(--bg-input, #141620);
  box-shadow: 0 0 0 3px rgba(255, 103, 31, 0.1);
}

/* ── Course Grid ── */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

/* ── Course Card ── */
.course-card {
  background: var(--bg-card, #1a1d27);
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
  cursor: pointer;
}

.course-card:hover {
  border-color: var(--nwm-orange, #FF671F);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(1, 15, 59, 0.4), 0 0 0 1px rgba(255, 103, 31, 0.2);
}

.course-card-thumb {
  height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px;
  border-bottom: 1px solid var(--border, #2a2d3a);
  position: relative;
  overflow: hidden;
}

.course-card-thumb::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 103, 31, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.course-thumb-icon {
  font-size: 48px;
  line-height: 1;
  z-index: 1;
  animation: gentle-float 3s ease-in-out infinite;
}

@keyframes gentle-float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-4px); }
}

.course-thumb-title {
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  z-index: 1;
  line-height: 1.3;
}

/* ── Cover image variant ── */
.course-card-thumb--img {
  padding: 0;
  height: 160px;
  display: block;
  position: relative;
}
.course-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 0;
}
.course-thumb-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.55));
  padding: 10px 14px 8px;
  display: flex;
  align-items: flex-end;
}
.course-thumb-icon-sm {
  font-size: 22px;
  line-height: 1;
  filter: drop-shadow(0 1px 3px rgba(0,0,0,0.6));
}

/* ── Card Body ── */
.course-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.course-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text, #e4e7ec);
  font-family: 'Poppins', sans-serif;
  line-height: 1.3;
}

.course-card-tag {
  font-size: 13px;
  color: var(--text-dim, #8b8fa3);
  line-height: 1.4;
  margin: 0;
}

/* ── Course Metadata ── */
.course-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted, #5a5e70);
  padding: 12px 0;
  border-top: 1px solid var(--border, #2a2d3a);
  border-bottom: 1px solid var(--border, #2a2d3a);
}

.course-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.course-meta-item b {
  color: var(--text, #e4e7ec);
  font-weight: 600;
}

/* ── Enrollment Info ── */
.course-enroll {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  padding: 12px 0;
}

.course-enroll-count {
  color: var(--text-muted, #5a5e70);
}

.course-enroll-pct {
  font-weight: 600;
  color: var(--nwm-orange, #FF671F);
  background: rgba(255, 103, 31, 0.1);
  padding: 4px 8px;
  border-radius: 6px;
}

/* ── Progress Bar ── */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border, #2a2d3a);
  border-radius: 3px;
  overflow: hidden;
  margin: 8px 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #FF671F, #FF8C42);
  border-radius: 3px;
  transition: width 0.3s ease;
  box-shadow: 0 0 12px rgba(255, 103, 31, 0.4);
}

/* ── Card Footer & Buttons ── */
.course-card-footer {
  padding: 12px 0 0 0;
  display: flex;
  gap: 8px;
}

.btn.course-view-btn,
.btn.course-enroll-btn {
  flex: 1;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.course-enroll-btn {
  background: linear-gradient(135deg, #FF671F, #FF8A00);
  color: white;
}

.course-enroll-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 103, 31, 0.3);
}

.course-enroll-btn:active {
  transform: translateY(0px);
}

.course-view-btn {
  background: var(--accent, #6c5ce7);
  color: white;
}

.course-view-btn:hover {
  background: var(--accent-hover, #7d6ff0);
  transform: translateY(-2px);
}

/* ── Empty State ── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted, #5a5e70);
  font-size: 16px;
}

/* ═══════════════════════════════════════════
   Course Detail Modal
   ═══════════════════════════════════════════ */

.course-detail-modal {
  background: var(--bg-card, #1a1d27);
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  max-width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  background: linear-gradient(135deg, rgba(255, 103, 31, 0.08), rgba(1, 15, 59, 0.12));
  border-bottom: 1px solid var(--border, #2a2d3a);
  padding: 32px 28px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.modal-header > div:first-child {
  flex: 1;
}

.modal-header > div:first-child > div:first-child {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 12px;
}

.modal-header h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: var(--text, #e4e7ec);
  font-family: 'Poppins', sans-serif;
  line-height: 1.3;
}

.modal-header p {
  margin: 8px 0 0;
  color: var(--text-dim, #8b8fa3);
  font-size: 14px;
  line-height: 1.4;
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-dim, #8b8fa3);
  transition: color 0.2s ease;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
}

.modal-close:hover {
  color: var(--text, #e4e7ec);
  background: var(--border, #2a2d3a);
}

/* ── Modal Content ── */
.course-detail-modal > div:last-child {
  padding: 28px;
}

.course-detail-modal h3 {
  margin: 20px 0 16px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text, #e4e7ec);
  font-family: 'Poppins', sans-serif;
  display: flex;
  align-items: center;
  gap: 8px;
}

.course-detail-modal h3:first-child {
  margin-top: 0;
}

/* ── Lessons List ── */
.course-detail-modal > div:last-child > div > div {
  padding: 12px;
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 8px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: all 0.2s ease;
}

.course-detail-modal > div:last-child > div > div:hover {
  background: var(--bg-card-hover, #222531);
  border-color: var(--nwm-orange, #FF671F);
}

.course-detail-modal > div:last-child > div > div > div:first-child {
  flex: 1;
}

.course-detail-modal > div:last-child > div > div div {
  margin: 0;
}

.course-detail-modal > div:last-child > div > div > div:first-child > div:first-child {
  font-weight: 600;
  color: var(--text, #e4e7ec);
  margin-bottom: 4px;
}

.course-detail-modal > div:last-child > div > div > div:first-child > div:last-child {
  font-size: 13px;
  color: var(--text-muted, #5a5e70);
  margin-top: 4px;
}

/* ── Lesson Complete Button ── */
.lesson-complete-btn {
  background: linear-gradient(135deg, #FF671F, #FF8A00);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.lesson-complete-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 103, 31, 0.3);
}

.lesson-complete-btn:active {
  transform: translateY(0px);
}

/* ═══════════════════════════════════════════
   Responsive Design
   ═══════════════════════════════════════════ */

@media (max-width: 768px) {
  .courses-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .course-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .course-search {
    max-width: 100%;
  }

  .modal-header {
    flex-direction: column;
    padding: 20px;
  }

  .course-detail-modal {
    margin: 20px auto;
    max-width: calc(100% - 40px);
  }

  .course-detail-modal > div:last-child {
    padding: 16px;
  }
}

@media (max-width: 480px) {
  .courses-stats {
    grid-template-columns: 1fr;
  }

  .course-card-thumb {
    height: 120px;
  }

  .course-thumb-icon {
    font-size: 36px;
  }

  .course-detail-modal > div:last-child > div > div {
    flex-direction: column;
    align-items: flex-start;
  }

  .lesson-complete-btn {
    width: 100%;
  }
}

/* ═══════════════════════════════════════════
   Tab Bar (admin / student switch)
   ═══════════════════════════════════════════ */

.courses-tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border, #2a2d3a);
  padding-bottom: 0;
}

.courses-tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim, #8b8fa3);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: -1px;
}

.courses-tab:hover {
  color: var(--text, #e4e7ec);
}

.courses-tab.active {
  color: var(--nwm-orange, #FF671F);
  border-bottom-color: var(--nwm-orange, #FF671F);
}

/* ═══════════════════════════════════════════
   Admin View — Course Management
   ═══════════════════════════════════════════ */

.courses-admin {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.courses-admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 4px;
}

.admin-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 12px;
  margin-top: 24px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.admin-table thead tr {
  border-bottom: 1px solid var(--border, #2a2d3a);
  background: rgba(255, 103, 31, 0.05);
}

.admin-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim, #8b8fa3);
  white-space: nowrap;
}

.admin-table td {
  padding: 14px 16px;
  color: var(--text, #e4e7ec);
  border-bottom: 1px solid var(--border, #2a2d3a);
  vertical-align: middle;
}

.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.admin-table tbody tr:hover {
  background: var(--bg-card-hover, #222531);
}

.admin-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: capitalize;
}

.badge-green {
  background: rgba(0, 184, 148, 0.15);
  color: #00b894;
  border: 1px solid rgba(0, 184, 148, 0.3);
}

.badge-yellow {
  background: rgba(253, 203, 110, 0.15);
  color: #fdcb6e;
  border: 1px solid rgba(253, 203, 110, 0.3);
}

.badge-red {
  background: rgba(225, 112, 85, 0.15);
  color: #e17055;
  border: 1px solid rgba(225, 112, 85, 0.3);
}

.admin-actions {
  white-space: nowrap;
}

.btn-sm-admin {
  background: var(--bg-card-hover, #222531);
  border: 1px solid var(--border, #2a2d3a);
  color: var(--text-dim, #8b8fa3);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-sm-admin:hover {
  color: var(--text, #e4e7ec);
  border-color: var(--nwm-orange, #FF671F);
}

.btn-sm-admin.btn-del:hover {
  color: #e17055;
  border-color: #e17055;
  background: rgba(225, 112, 85, 0.1);
}

/* ── Lessons Panel ── */
.lessons-panel {
  margin-top: 24px;
  border: 1px solid var(--nwm-orange, #FF671F);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-card, #1a1d27);
}

.lessons-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  background: rgba(255, 103, 31, 0.08);
  border-bottom: 1px solid var(--border, #2a2d3a);
}

.lessons-panel-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text, #e4e7ec);
}

.lessons-list {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lesson-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.lesson-row:hover {
  background: var(--bg-card-hover, #222531);
  border-color: var(--nwm-orange, #FF671F);
}

.lesson-row-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 103, 31, 0.15);
  color: var(--nwm-orange, #FF671F);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.lesson-row-body {
  flex: 1;
  min-width: 0;
}

.lesson-row-title {
  font-weight: 600;
  color: var(--text, #e4e7ec);
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lesson-row-meta {
  font-size: 12px;
  color: var(--text-muted, #5a5e70);
  margin-top: 2px;
}

.lesson-row-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

/* ── Admin Modal ── */
.admin-modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 20px;
  overflow-y: auto;
}

.admin-modal {
  background: var(--bg-card, #1a1d27);
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 16px;
  width: 100%;
  max-width: 560px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.admin-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border, #2a2d3a);
}

.admin-modal-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--text, #e4e7ec);
  font-family: 'Poppins', sans-serif;
}

/* ── Admin Form ── */
.admin-form {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: calc(90vh - 80px);
  overflow-y: auto;
}

.admin-form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.admin-form-row label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim, #8b8fa3);
}

.admin-form input,
.admin-form select,
.admin-form textarea {
  background: var(--bg-input, #141620);
  border: 1px solid var(--border, #2a2d3a);
  border-radius: 8px;
  color: var(--text, #e4e7ec);
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s ease;
  width: 100%;
}

.admin-form input:focus,
.admin-form select:focus,
.admin-form textarea:focus {
  outline: none;
  border-color: var(--nwm-orange, #FF671F);
  box-shadow: 0 0 0 3px rgba(255, 103, 31, 0.1);
}

.admin-form-footer {
  display: flex;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border, #2a2d3a);
  margin-top: 8px;
}

@media (max-width: 600px) {
  .lessons-panel-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .lesson-row {
    flex-wrap: wrap;
  }

  .admin-table th:nth-child(4),
  .admin-table td:nth-child(4),
  .admin-table th:nth-child(5),
  .admin-table td:nth-child(5) {
    display: none;
  }
}