/* ===== Course Home ===== */

.course-hero {
  background: linear-gradient(135deg, #e8f6f4 0%, #dceeff 60%, #fef6e4 100%);
  padding: 140px 0 32px;
}
body[data-theme='dark'] .course-hero {
  background: linear-gradient(135deg, #0f1e2e 0%, #101d31 60%, #14202e 100%);
}
.course-hero-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.course-eyebrow { color: var(--teal-dark); font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 4px; }
.course-hero h1 { color: var(--navy); margin: 0; }

.course-streak {
  display: flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--border); border-radius: 999px;
  padding: 8px 16px; box-shadow: var(--shadow); font-weight: 600; color: var(--navy);
  white-space: nowrap;
}
body[data-theme='dark'] .course-streak { background: #101d31; }
.course-streak-flame { font-size: 1.1rem; }

.course-progress-block { margin-bottom: 20px; }
.course-progress-row { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; font-weight: 700; color: var(--navy); }
.course-progress-track {
  height: 10px; border-radius: 999px; background: rgba(26,58,92,0.1); overflow: hidden;
}
body[data-theme='dark'] .course-progress-track { background: rgba(255,255,255,0.1); }
.course-progress-fill {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.continue-card {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 24px; box-shadow: var(--shadow);
}
body[data-theme='dark'] .continue-card { background: #101d31; }
.continue-eyebrow { font-size: 0.78rem; font-weight: 700; color: var(--teal-dark); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
.continue-card h3 { margin: 0; color: var(--navy); }

.course-search-row { margin-bottom: 20px; }
.course-search-row input {
  width: 100%; padding: 12px 16px; border-radius: 10px; border: 1px solid var(--border);
  font-size: 0.95rem; background: #fff;
}
body[data-theme='dark'] .course-search-row input { background: #101d31; color: #fff; }

.course-tabs {
  display: flex; gap: 4px; flex-wrap: wrap; border-bottom: 2px solid var(--border); margin-bottom: 24px;
}
.course-tab {
  padding: 10px 18px; border: none; background: none; cursor: pointer;
  font-weight: 600; color: var(--text-muted, #6b7a8d); font-size: 0.92rem;
  border-bottom: 3px solid transparent; margin-bottom: -2px; transition: color 0.15s, border-color 0.15s;
}
.course-tab:hover { color: var(--teal-dark); }
.course-tab.active { color: var(--teal-dark); border-bottom-color: var(--teal); }

.course-tab-panel { display: none; animation: course-fade-in 0.25s ease; }
.course-tab-panel.active { display: block; }
@keyframes course-fade-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

.term-group { margin-bottom: 28px; }
.term-group:last-child { margin-bottom: 0; }
.term-group-heading {
  color: var(--navy); font-size: 1.05rem; margin-bottom: 12px;
  padding-bottom: 8px; border-bottom: 2px solid rgba(26,158,143,0.2);
  display: flex; align-items: baseline; gap: 8px;
}
body[data-theme='dark'] .term-group-heading { color: #fff; }

.lesson-row {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 18px; border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px;
  background: #fff; transition: box-shadow 0.15s, border-color 0.15s;
}
body[data-theme='dark'] .lesson-row { background: #101d31; }
.lesson-row:hover { box-shadow: var(--shadow); border-color: var(--teal); }
.lesson-row.completed { border-color: rgba(26,158,143,0.35); background: rgba(26,158,143,0.05); }
.lesson-row.locked { opacity: 0.65; }

.lesson-status-icon {
  width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 0.95rem; background: rgba(26,58,92,0.08); color: var(--navy);
  transition: transform 0.2s ease, background 0.2s ease;
}
.lesson-row.completed .lesson-status-icon { background: var(--teal); color: #fff; }
.lesson-status-icon.just-completed { animation: lesson-pop 0.4s ease; }
@keyframes lesson-pop { 0% { transform: scale(1); } 40% { transform: scale(1.3); } 100% { transform: scale(1); } }

.lesson-row-main { flex: 1; min-width: 0; }
.lesson-row-title { font-weight: 600; color: var(--navy); margin-bottom: 2px; }
body[data-theme='dark'] .lesson-row-title { color: #fff; }
.lesson-row-meta { font-size: 0.8rem; color: var(--text-muted, #6b7a8d); }

.free-badge {
  display: inline-block; font-size: 0.68rem; font-weight: 700; color: var(--teal-dark);
  background: rgba(26,158,143,0.12); border-radius: 999px; padding: 2px 8px; margin-left: 6px;
}

.empty-tab-state { text-align: center; padding: 40px 20px; color: var(--text-muted, #6b7a8d); }

.quiz-score-badge {
  font-size: 0.78rem; font-weight: 700; color: var(--amber); background: rgba(245,166,35,0.14);
  border-radius: 999px; padding: 2px 10px;
}

@media (max-width: 640px) {
  .course-hero { padding-top: 120px; }
  .lesson-row { flex-wrap: wrap; }
  .course-tabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
  .course-tab { white-space: nowrap; }
}