body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fff;
  color: #222;
}

header {
  border-bottom: 3px solid #eee;
  padding: 10px 15px;
  background: #fff;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: center; /* Center horizontally */
  flex-wrap: wrap; /* Wrap on small screens */
  text-align: center;
}

.logo {
  max-width: 120px; /* You can make it bigger (150px, 200px) */
  height: auto;
  margin-right: 15px;
}

.header-text h1 {
  font-size: 1.5rem;
  margin: 0;
  font-weight: bold;
}

.tagline {
  font-size: 0.9rem;
  color: #444;
  margin: 2px 0 0;
}

@media (min-width: 768px) {
  .header-container {
    justify-content: space-between; /* Desktop par left-right align */
    text-align: left;
  }
  .header-text h1 {
    font-size: 2rem;
  }
  .logo {
    max-width: 150px; /* Desktop par thoda bada */
  }
}

.logo {
  max-width: 140px;
  margin-bottom: 10px;
}

.section {
  max-width: 900px;
  margin: auto;
  padding: 15px;
  border-bottom: 1px solid #ddd;
}

.section h2 {
  display: flex;
  justify-content: space-between;
  cursor: pointer;
  background: #f7f7f7;
  padding: 15px;
  border-radius: 10px;
}

.content {
  display: none;
  margin-top: 10px;
}

.diagram {
  background: #f5f5f5;
  padding: 10px;
  border-radius: 8px;
  font-family: monospace;
  margin-top: 10px;
}

.arrow {
  transition: transform 0.3s ease;
}

.arrow.open {
  transform: rotate(180deg);
}

footer {
  text-align: center;
  padding: 15px;
  font-size: 0.9rem;
  background: #f7f7f7;
}