/* EduSpark LMS — Frontend */
:root {
  --esp-primary: #2563eb;
  --esp-primary-dark: #1d4ed8;
  --esp-success: #16a34a;
  --esp-danger: #dc2626;
  --esp-bg: #f8fafc;
  --esp-card: #fff;
  --esp-border: #e2e8f0;
  --esp-text: #0f172a;
  --esp-muted: #64748b;
  --esp-radius: 10px;
  --esp-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
}

.eduspark-wrap { max-width: 1100px; margin: 0 auto; padding: 24px 16px; color: var(--esp-text); }
.eduspark-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: 8px; border: 1px solid var(--esp-border);
  background: #fff; color: var(--esp-text); font-weight: 600; cursor: pointer;
  text-decoration: none; line-height: 1.2; transition: .15s ease;
}
.eduspark-btn:hover { background: #f1f5f9; color: var(--esp-text); }
.eduspark-btn-primary { background: var(--esp-primary); border-color: var(--esp-primary); color: #fff; }
.eduspark-btn-primary:hover { background: var(--esp-primary-dark); color: #fff; }
.eduspark-btn:disabled { opacity: .55; cursor: not-allowed; }

.eduspark-badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  background: #dbeafe; color: var(--esp-primary); font-size: 12px; font-weight: 700;
}
.eduspark-badge.preview { background: #fef3c7; color: #b45309; }

.eduspark-progress {
  position: relative; height: 10px; background: #e2e8f0; border-radius: 999px;
  margin: 10px 0 16px; overflow: hidden;
}
.eduspark-progress-bar { height: 100%; background: linear-gradient(90deg, var(--esp-primary), #60a5fa); border-radius: 999px; }
.eduspark-progress span { display: block; margin-top: 6px; font-size: 12px; color: var(--esp-muted); }

/* Grid */
.eduspark-course-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px;
}
.eduspark-course-card {
  background: var(--esp-card); border: 1px solid var(--esp-border); border-radius: var(--esp-radius);
  overflow: hidden; box-shadow: var(--esp-shadow); display: flex; flex-direction: column;
}
.eduspark-card-thumb { position: relative; display: block; aspect-ratio: 16/10; background: #e2e8f0; overflow: hidden; }
.eduspark-card-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.eduspark-thumb-placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #dbeafe, #e0e7ff); }
.eduspark-card-thumb .eduspark-badge { position: absolute; top: 10px; left: 10px; }
.eduspark-card-body { padding: 14px 16px 16px; flex: 1; display: flex; flex-direction: column; }
.eduspark-card-title { margin: 0 0 8px; font-size: 1.05rem; }
.eduspark-card-title a { color: inherit; text-decoration: none; }
.eduspark-card-excerpt { color: var(--esp-muted); font-size: .92rem; margin: 0 0 12px; flex: 1; }
.eduspark-card-footer { display: flex; justify-content: space-between; align-items: center; font-size: .9rem; }
.eduspark-card-price { font-weight: 700; color: var(--esp-primary); }

/* Single course */
.eduspark-course-hero {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 28px; margin-bottom: 32px;
  background: var(--esp-card); border: 1px solid var(--esp-border); border-radius: var(--esp-radius);
  padding: 20px; box-shadow: var(--esp-shadow);
}
.eduspark-course-thumb img { width: 100%; border-radius: 8px; display: block; }
.eduspark-course-title { margin: 8px 0 12px; font-size: 1.8rem; }
.eduspark-course-meta-row { display: flex; flex-wrap: wrap; gap: 12px; color: var(--esp-muted); font-size: .92rem; margin-bottom: 12px; }
.eduspark-price { font-size: 1.5rem; font-weight: 800; color: var(--esp-primary); }
.eduspark-price.free { color: var(--esp-success); }
.eduspark-price-regular { text-decoration: line-through; color: var(--esp-muted); margin-right: 8px; font-size: 1rem; }
.eduspark-course-body { display: grid; grid-template-columns: 1fr 300px; gap: 28px; }
.eduspark-section-block { margin-bottom: 28px; }
.eduspark-card { background: var(--esp-card); border: 1px solid var(--esp-border); border-radius: var(--esp-radius); padding: 16px; margin-bottom: 16px; }
.eduspark-list { padding-left: 1.2rem; }
.eduspark-list li { margin-bottom: 6px; }

/* Curriculum */
.eduspark-curr-section { border: 1px solid var(--esp-border); border-radius: 8px; margin-bottom: 12px; overflow: hidden; }
.eduspark-curr-section-title { margin: 0; padding: 12px 14px; background: #f1f5f9; font-size: 1rem; }
.eduspark-curr-items { list-style: none; margin: 0; padding: 0; }
.eduspark-curr-item {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  border-top: 1px solid var(--esp-border); font-size: .95rem;
}
.eduspark-curr-item a { color: var(--esp-text); text-decoration: none; flex: 1; }
.eduspark-curr-item a:hover { color: var(--esp-primary); }
.eduspark-item-type, .eduspark-item-meta { color: var(--esp-muted); font-size: .8rem; }
.eduspark-check { color: var(--esp-success); font-weight: 700; }
.eduspark-curr-item.status-completed { background: #f0fdf4; }

/* Learn mode */
.eduspark-learn-app { display: grid; grid-template-columns: 300px 1fr; min-height: 70vh; gap: 0; border-top: 1px solid var(--esp-border); }
.eduspark-learn-sidebar {
  background: #0f172a; color: #e2e8f0; padding: 16px; overflow-y: auto; max-height: calc(100vh - 80px);
  position: sticky; top: 0;
}
.eduspark-learn-sidebar a { color: #93c5fd; }
.eduspark-learn-sidebar .eduspark-curr-section { border-color: #334155; }
.eduspark-learn-sidebar .eduspark-curr-section-title { background: #1e293b; color: #f8fafc; }
.eduspark-learn-sidebar .eduspark-curr-item { border-color: #334155; }
.eduspark-learn-sidebar .eduspark-curr-item a { color: #e2e8f0; }
.eduspark-learn-content { padding: 28px 32px; background: var(--esp-bg); }
.eduspark-lesson-view h1 { margin-top: 0; }
.eduspark-media video, .eduspark-media iframe, .eduspark-media img { max-width: 100%; border-radius: 8px; }
.eduspark-media video { width: 100%; background: #000; }
.eduspark-learn-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--esp-border); }
.eduspark-materials { margin-top: 24px; padding: 16px; background: #fff; border: 1px solid var(--esp-border); border-radius: 8px; }

/* AI assistant */
.eduspark-ai-assistant {
  margin-top: 28px; padding: 16px; border: 1px solid #c7d2fe; background: #eef2ff; border-radius: 10px;
}
.eduspark-ai-actions { display: flex; gap: 8px; margin-bottom: 10px; }
.eduspark-ai-ask { display: flex; gap: 8px; }
.eduspark-ai-question { flex: 1; padding: 10px 12px; border: 1px solid var(--esp-border); border-radius: 8px; }
.eduspark-ai-response { margin-top: 12px; white-space: pre-wrap; line-height: 1.5; }

/* Quiz */
.eduspark-quiz-player { max-width: 760px; }
.eduspark-quiz-meta { color: var(--esp-muted); padding-left: 1.1rem; }
.eduspark-quiz-timer { font-weight: 700; color: var(--esp-danger); margin: 12px 0; font-size: 1.1rem; }
.eduspark-question { background: #fff; border: 1px solid var(--esp-border); border-radius: 10px; padding: 16px; margin-bottom: 14px; }
.eduspark-question h4 { margin: 0 0 10px; }
.eduspark-answer-option { display: block; padding: 8px 10px; margin: 4px 0; border-radius: 6px; cursor: pointer; }
.eduspark-answer-option:hover { background: #f1f5f9; }
.eduspark-quiz-results { background: #fff; border: 1px solid var(--esp-border); border-radius: 10px; padding: 20px; margin-top: 16px; }
.eduspark-quiz-results.passed { border-color: #86efac; background: #f0fdf4; }
.eduspark-quiz-results.failed { border-color: #fca5a5; background: #fef2f2; }

/* Profile / checkout */
.eduspark-my-course-card {
  display: flex; gap: 16px; padding: 14px; border: 1px solid var(--esp-border); border-radius: 10px;
  margin-bottom: 12px; background: #fff; align-items: center;
}
.eduspark-my-course-card img { width: 90px; height: 60px; object-fit: cover; border-radius: 6px; }
.eduspark-checkout { max-width: 520px; background: #fff; border: 1px solid var(--esp-border); border-radius: 12px; padding: 24px; }
.eduspark-gateway { display: block; border: 1px solid var(--esp-border); border-radius: 8px; padding: 10px 12px; margin: 8px 0; }
.eduspark-input { width: 100%; padding: 10px 12px; border: 1px solid var(--esp-border); border-radius: 8px; }
.eduspark-notice { padding: 14px 16px; background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 8px; margin: 12px 0; }
.eduspark-notice.success { background: #f0fdf4; border-color: #86efac; }
.eduspark-notice.locked { background: #fff7ed; border-color: #fdba74; }

@media (max-width: 900px) {
  .eduspark-course-hero, .eduspark-course-body, .eduspark-learn-app { grid-template-columns: 1fr; }
  .eduspark-learn-sidebar { position: relative; max-height: none; }
}