:root {
  --primary-color: #0A2540;
  --secondary-color: #61C4FF;
  --neutral-color: #F5F5F7;
  --accent-color: #FFD700;
  --font-family: 'Open Sans', Arial, sans-serif;
}

body {
  margin: 0;
  font-family: var(--font-family);
  background: linear-gradient(135deg, #0A2540, #1E3A5F);
  color: #fff;
  line-height: 1.6;
  padding: 20px;
}

header {
  text-align: center;
  padding: 40px 20px;
  background: rgba(10, 37, 64, 0.8);
  border-bottom: 2px solid var(--accent-color);
}

header h1 {
  font-size: 2.5rem;
  margin: 0;
  color: var(--secondary-color);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.card {
  background: var(--neutral-color);
  color: #000;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
}

.card img {
  width: 100%;
  height: auto;
  display: block;
}

.card-content {
  padding: 20px;
}

.card h3 {
  margin-top: 0;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.card p {
  margin: 10px 0 0;
  font-size: 1rem;
  line-height: 1.5;
}

button {
  background: var(--secondary-color);
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover {
  background: var(--accent-color);
  transform: scale(1.05);
}

pre {
  background: #0A2540;
  color: #fff;
  padding: 15px;
  border-radius: 8px;
  overflow-x: auto;
}

code {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.9rem;
  color: #FFD700;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: var(--neutral-color);
  color: #000;
}

table th, table td {
  padding: 10px;
  text-align: left;
  border: 1px solid #ddd;
}

table th {
  background: var(--accent-color);
  color: #000;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }
  .container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.5rem;
  }
}