.module-nav {
  background: var(--light);
  padding: 1.5rem;
  margin-bottom: 3rem;
  border: 5px solid var(--dark);
  border-left: 15px solid var(--primary);
}

.module-nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.module-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  transition: all 0.1s;
  border-bottom: 3px solid transparent;
}

.module-nav a:hover,
.module-nav a.active {
  border-bottom: 3px solid var(--primary);
}

.module-header {
  padding: 3rem;
  margin-bottom: 3rem;
  background: var(--blue);
  color: var(--light);
  border: 8px solid var(--dark);
  transform: rotate(-0.5deg);
}

.module-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 1rem;
  text-transform: uppercase;
  line-height: 1;
}

.module-header .meta {
  display: flex;
  gap: 2rem;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
}

.content-section {
  background: var(--light);
  padding: 3rem;
  margin-bottom: 3rem;
  border: 6px solid var(--dark);
}

.content-section h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 5px solid var(--dark);
  text-transform: uppercase;
  color: var(--dark) !important;
}

.content-section h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  text-transform: uppercase;
  color: var(--dark);
}

.content-section p,
.content-section li {
  color: var(--dark);
}

.content-section ul,
.content-section ol {
  margin-left: 2rem;
  margin-bottom: 1.5rem;
}

.content-section li {
  margin-bottom: 0.75rem;
  font-weight: 400;
}

.code-block {
  background: var(--dark);
  color: var(--yellow);
  padding: 2rem;
  overflow-x: auto;
  margin: 2rem 0;
  font-family: 'Space Mono', monospace;
  font-size: 0.875rem;
  border: 5px solid var(--dark);
  font-weight: 700;
  white-space: pre-wrap;
  line-height: 1.6;
}

.lab-exercise {
  background: var(--yellow);
  padding: 2rem;
  margin: 2rem 0;
  border: 5px solid var(--dark);
  box-shadow: 8px 8px 0 var(--dark);
}

.lab-exercise h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 900;
  margin-bottom: 1rem;
  text-transform: uppercase;
  font-size: 1.25rem;
}

.note {
  background: var(--light);
  padding: 1.5rem;
  margin: 2rem 0;
  border-left: 10px solid #fbbf24;
  border: 5px solid var(--dark);
  border-left-width: 15px;
  border-left-color: #fbbf24;
}

.tip {
  background: var(--light);
  padding: 1.5rem;
  margin: 2rem 0;
  border: 5px solid var(--dark);
  border-left-width: 15px;
  border-left-color: var(--secondary);
}

.warning {
  background: var(--light);
  padding: 1.5rem;
  margin: 2rem 0;
  border: 5px solid var(--dark);
  border-left-width: 15px;
  border-left-color: var(--peru-red);
}

.progress-tracker {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--yellow);
  padding: 1.5rem;
  border: 5px solid var(--dark);
  min-width: 200px;
  box-shadow: 8px 8px 0 var(--dark);
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--light);
  border: 3px solid var(--dark);
  overflow: hidden;
  margin-top: 0.5rem;
}

.progress-fill {
  height: 100%;
  background: var(--dark);
  transition: width 0.3s;
}

.nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 4rem;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 5px solid var(--dark);
}

@media (max-width: 768px) {
  .module-nav ul {
    flex-direction: column;
  }
  
  .nav-buttons {
    flex-direction: column;
  }
  
  .progress-tracker {
    display: none;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
}