/* stackcone Learn — educative course styling */

.learn-page {
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  min-height: 100vh;
}

.learn-main {
  flex: 1;
  padding: 2rem 0 4rem;
}

.learn-main-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  box-sizing: border-box;
}

/* Catalog hero */
.learn-hero h1 {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  margin: 0 0 0.75rem;
  color: #0f172a;
}

.learn-hero-desc {
  font-size: 1.05rem;
  color: #64748b;
  line-height: 1.7;
  max-width: 40rem;
  margin: 0 0 2.5rem;
}

.learn-tracks {
  display: grid;
  gap: 2rem;
}

.learn-track-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  border-top: 4px solid var(--track-color, #0f172a);
}

.learn-track-card-head {
  margin-bottom: 1.25rem;
}

.learn-track-parent {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #94a3b8;
  margin-bottom: 0.2rem;
}

.learn-track-card h2 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: #0f172a;
}

.learn-track-card p {
  margin: 0;
  color: #64748b;
  font-size: 0.95rem;
  line-height: 1.55;
}

.learn-track-count {
  margin-top: 0.5rem !important;
  font-size: 0.8rem !important;
  font-weight: 600;
  color: var(--track-color, #0f172a) !important;
}

.learn-course-list {
  display: grid;
  gap: 0.5rem;
}

.learn-course-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.learn-course-link:hover {
  border-color: var(--track-color, #94a3b8);
  background: #f8fafc;
  transform: translateX(3px);
  color: inherit;
}

.learn-course-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  background: #f1f5f9;
  font-size: 0.75rem;
  font-weight: 700;
  color: #475569;
  flex-shrink: 0;
}

.learn-course-link strong {
  display: block;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 0.1rem;
}

.learn-course-link small {
  font-size: 0.8rem;
  color: #94a3b8;
}

/* Lesson layout */
.learn-breadcrumb {
  font-size: 0.85rem;
  color: #94a3b8;
  margin: 0 0 1.25rem;
}

.learn-breadcrumb a {
  color: #64748b;
  text-decoration: none;
}

.learn-breadcrumb a:hover {
  color: #0f172a;
}

.learn-layout {
  display: grid;
  grid-template-columns: 16rem minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.learn-sidebar {
  position: sticky;
  top: 5.5rem;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.learn-sidebar-head {
  padding-bottom: 1rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid #e2e8f0;
}

.learn-sidebar-track {
  font-weight: 700;
  font-size: 0.95rem;
  color: #0f172a;
  margin: 0;
}

.learn-sidebar-progress {
  font-size: 0.75rem;
  color: #94a3b8;
  margin: 0.15rem 0 0;
}

.learn-sidebar-lessons {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-height: 28rem;
  overflow-y: auto;
}

.learn-sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: #475569;
  text-decoration: none;
  line-height: 1.35;
  transition: background 0.15s ease, color 0.15s ease;
}

.learn-sidebar-link:hover {
  background: #f1f5f9;
  color: #0f172a;
}

.learn-sidebar-link.is-active {
  background: #0f172a;
  color: #fff;
  font-weight: 600;
}

.learn-sidebar-link.is-done:not(.is-active) {
  color: #64748b;
}

.learn-sidebar-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  background: #f1f5f9;
  font-size: 0.65rem;
  font-weight: 700;
  flex-shrink: 0;
}

.learn-sidebar-link.is-active .learn-sidebar-num {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

/* Lesson content */
.learn-lesson {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 2rem 2.25rem 2.5rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.learn-lesson-meta {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.learn-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: #ecfdf5;
  color: #047857;
}

.learn-duration {
  font-size: 0.8rem;
  font-weight: 600;
  color: #94a3b8;
  padding: 0.25rem 0;
}

.learn-lesson h1 {
  margin-top: 0;
}

.learn-summary {
  font-size: 1.1rem;
  color: #64748b;
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.learn-objectives {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 12px;
  padding: 1.15rem 1.35rem;
  margin-bottom: 2rem;
}

.learn-objectives h2 {
  font-size: 0.8rem !important;
  font-weight: 700 !important;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #047857 !important;
  margin: 0 0 0.65rem !important;
  border: none !important;
  padding: 0 !important;
}

.learn-objectives ul {
  margin: 0;
  padding-left: 1.15rem;
  color: #166534;
}

.learn-objectives li {
  margin-bottom: 0.35rem;
  font-size: 0.9375rem;
}

.learn-code-wrap {
  position: relative;
  margin: 1.25rem 0 1.5rem;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #1e293b;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
}

.learn-code-wrap pre {
  margin: 0;
  border-radius: 0;
}

.learn-exercise {
  margin: 2rem 0;
  padding: 1.15rem 1.35rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 4px solid #f59e0b;
  border-radius: 10px;
}

.learn-exercise h3 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #b45309;
}

.learn-exercise p {
  margin: 0;
  color: #78350f;
  font-size: 0.95rem;
  line-height: 1.6;
}

.learn-lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e2e8f0;
}

/* Override .blog-article a:not(.cta) underline + dark text on nav buttons */
.blog-article a.learn-nav-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #475569;
  text-decoration: none;
  text-underline-offset: unset;
  text-decoration-thickness: unset;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #fff;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.blog-article a.learn-nav-btn:hover {
  border-color: #0f172a;
  color: #0f172a;
  text-decoration: none;
}

.blog-article a.learn-nav-btn--primary {
  background: #0f172a;
  color: #fff;
  border-color: #0f172a;
}

.blog-article a.learn-nav-btn--primary:hover {
  background: #1e293b;
  color: #fff;
  text-decoration: none;
}

.learn-nav-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #475569;
  text-decoration: none;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #fff;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.learn-nav-btn:hover {
  border-color: #0f172a;
  color: #0f172a;
}

.learn-nav-btn--primary {
  background: #0f172a;
  color: #fff;
  border-color: #0f172a;
}

.learn-nav-btn--primary:hover {
  background: #1e293b;
  color: #fff;
}

.learn-nav-btn.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}

@media (max-width: 900px) {
  .learn-layout {
    grid-template-columns: 1fr;
  }

  .learn-sidebar {
    position: static;
  }

  .learn-sidebar-lessons {
    max-height: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  }

  .learn-lesson {
    padding: 1.5rem 1.25rem 2rem;
  }

  .learn-lesson-nav {
    flex-direction: column;
  }

  .learn-nav-btn {
    justify-content: center;
  }
}