body {
  font-family: "Segoe UI", sans-serif;
  background: #f2f5f9;
  margin: 0;
  display: flex;
  justify-content: center;
  padding: 1.5rem;
}

.about-container {
  max-width: 700px;
  width: 100%;
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.about-title {
  text-align: center;
  margin-bottom: 1.5rem;
  color: #49bf9d;
}

section {
  margin-bottom: 1.4rem;
}

section h2 {
  margin-bottom: 0.5rem;
  color: #49bf9d;
}

ul {
  padding-left: 1.2rem;
}

.nav-buttons {
  text-align: center;
  margin-top: 1.5rem;
}

.back-btn {
  background: #49bf9d;
  color: white;
  padding: 0.7rem 1.4rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
  transition: background 0.3s ease;
}

.back-btn:hover,
.back-btn:focus {
  background: #3aa081;
}