.main-background {
  /* background-color: #18385c; */
 
  /* min-height: 100vh; */
  background-image: url('/img/301.jpg'); 
  background-size: cover;
  background-position: center;
  padding: 80px 10px;
  text-align: center;
  /* color: white; */
}

.about-section {
  padding: 60px 20px;
  background-color: #ffffff;
  transition: background-color 0.3s ease;
}

.about-section.dark {
  background-color: #1e1e2f;
}

.about-card {
  background: #eeeded98;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  font-size: 16px;
  color: #2c3e50;
  line-height: 1.7;
  transition: all 0.3s ease;
}

.about-section.dark .about-card {
  background: #2b2b3c;
  color: #eaeaea;
}

.about-card p {
  margin-bottom: 18px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 30px;
  color: #1a1a1a;
}

.about-section.dark .section-title {
  color: #ffffff;
}

@media (max-width: 768px) {
  .about-card {
    font-size: 14px;
    padding: 20px;
  }

  .section-title {
    font-size: 22px;
  }
}

  canvas {
  max-width: 1000px;
  max-height: 400px;
  margin: 0 auto;
  display: block;
}

  #chartContainer {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all 0.6s ease-in-out;
}

#chartContainer.visible {
  opacity: 1;
  max-height: 5000px;
  margin-top: 20px;
}


.show-btn {
  padding: 12px 20px;
  font-size: 16px;
  background-color: #2c7be5;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 15px;
  transition: background-color 0.3s ease;
}

.show-btn:hover {
  background-color: #1a5ecb;
}