/* public_html/css/references.css */

#container {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.columns {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.left-column, .right-column {
  flex: 1;
  min-width: 300px;
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.left-column h2, .right-column h2 {
  color: var(--primary-green);
  margin-bottom: 1.2rem;
  border-bottom: 2px solid var(--accent-orange);
  padding-bottom: 0.5rem;
}

/* Topic Buttons */
.topic-btn {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem;
  margin-bottom: 0.6rem;
  background: #f8f8f8;
  color: var(--dark);
  border: 1px solid #ddd;
  border-radius: 6px;
  text-align: left;
  font-size: 1.02rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.topic-btn:hover {
  background: var(--primary-green);
  color: white;
  border-color: var(--primary-green);
  transform: translateX(6px);
}

/* Video Buttons */
.video-btn {
  display: block;
  width: 100%;
  padding: 1rem;
  margin-bottom: 0.8rem;
  background: #fff;
  color: var(--primary-green);
  border: 2px solid var(--primary-green);
  border-radius: 6px;
  font-size: 1.05rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
}

.video-btn:hover {
  background: var(--primary-green);
  color: white;
}

/* Responsive */
@media (max-width: 768px) {
  .columns {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .left-column, .right-column {
    min-width: 100%;
  }
}