* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: linear-gradient(135deg, #141e30, #243b55);
  font-family: "Segoe UI", sans-serif;
  color: white;
  min-height: 100vh;
  padding: 40px 20px;
}

.top-section {
  text-align: center;
  margin-bottom: 50px;
}

.top-section h1 {
  font-size: 2.7rem;
  margin-bottom: 10px;
  color: #4fc3f7;
}

.top-section p {
  color: #d6e4f0;
  font-size: 1rem;
}

.wrapper {
  max-width: 1000px;
  margin: auto;

  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.box {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 25px;
  backdrop-filter: blur(8px);

  transition: 0.3s;
}

.box:hover {
  transform: translateY(-5px);
  border-color: #4fc3f7;
}

.box h2 {
  margin-bottom: 18px;
  color: #4fc3f7;
}

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background-color: #4fc3f7;
  color: #0f172a;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s;
  margin-bottom: 18px;
}

.btn:hover {
  background-color: #81d4fa;
}

.content {
  display: none;
  line-height: 1.7;
  color: #f1f5f9;
}

.content p {
  margin-bottom: 12px;
}

code {
  background: rgba(255,255,255,0.12);
  padding: 4px 8px;
  border-radius: 5px;
  color: #ffd54f;
}

pre {
  background: #0f172a;
  padding: 14px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 14px 0;
  color: #e2e8f0;
}

@media (max-width: 600px) {

  .top-section h1 {
    font-size: 2rem;
  }

  .box {
    padding: 20px;
  }

}