body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  background: #f4f9f7;
  color: #2c2c2c;
}
a {
  text-decoration: none;
}
.hero {
  background: linear-gradient(to right, #d0ebe7, #a9d8d2);
  padding: 5rem 2rem;
  text-align: center;
}
.hero h1 {
  font-size: 2.8rem;
  color: #1e3c3a;
}
.hero p {
  font-size: 1.2rem;
  color: #33504e;
}
.hero-btn {
  margin-top: 2rem;
}
.top-nav {
  background: #1e3c3a;
  color: white;
  display: flex;
  justify-content: center;
  padding: 1rem;
  gap: 2rem;
}
.top-nav a {
  color: white;
  font-weight: 500;
}
main {
  padding: 2rem;
}
.blog {
  max-width: 800px;
  margin: auto;
}
.blog h2, .blog h3 {
  color: #1e3c3a;
}
.btn {
  display: inline-block;
  padding: 0.7rem 1.2rem;
  background: #1e3c3a;
  color: white;
  border-radius: 6px;
  margin-top: 1rem;
}
.tools-grid {
  max-width: 1000px;
  margin: auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  padding: 3rem 0;
}
.card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
  text-align: center;
  transition: transform 0.3s;
}
.card:hover {
  transform: translateY(-4px);
}
.card h3 {
  color: #1e3c3a;
}
footer {
  background: #e4f1ef;
  text-align: center;
  padding: 1.5rem;
  color: #1e3c3a;
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .top-nav {
    flex-direction: column;
    gap: 1rem;
  }
}