* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
}

header {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: #2c3e50;
  color: white;
  text-align: center;
  padding: 20px;
}

header h1 {
  font-size: 3rem;
  margin-bottom: 30px;
}

.button-group {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
}

button {
  padding: 12px 24px;
  font-size: 1.1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  background: #3498db;
  color: white;
}

button:hover {
  opacity: 0.85;
}

.code-area {
  width: 95%;
  max-width: 1440px;
  background: #1b1b1b;
  color: #00ff00;
  padding: 20px;
  font-size: 1.5rem;
  overflow-x: auto;
  text-align: left;
  display: none;
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 15px;
  border-radius: 10px;
}

section {
  height: 100vh;
  padding: 50px 20px;
  border-bottom: 2px solid #ccc;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: #fff;
}

h2 {
  font-size: 2.2rem;
  margin-bottom: 15px;
}

p {
  font-size: 1.3rem;
  margin-bottom: 25px;
  text-align: center;
  max-width: 800px;
}

.box {
  width: 100px;
  height: 100px;
  background: #3498db;
  margin-bottom: 30px;
}

.code-block {
  width: 95%;
  max-width: 1440px;
  margin-top: 15px;
}

.code-block h3 {
  background: #444;
  color: #fff;
  margin: 0;
  padding: 8px 12px;
  font-size: 1.2rem;
  border-top-left-radius: 5px;
  border-top-right-radius: 5px;
}

pre.code {
  background: #1b1b1b;
  color: #00ff00;
  margin: 0;
  padding: 15px;
  overflow-x: auto;
  font-size: 1.5rem;
  white-space: pre-wrap;
  word-break: break-word;
  border-bottom-left-radius: 5px;
  border-bottom-right-radius: 5px;
}