body { margin: 0; font-family: 'Roboto', sans-serif; background: linear-gradient(135deg, #2C3E50, #18BC9C); color: #fff; line-height: 1.6; overflow-x: hidden; }
header { position: relative; height: 100vh; display: flex; justify-content: center; align-items: center; text-align: center; background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover, linear-gradient(#2C3E50, #18BC9C); }
header h1 { font-size: 4rem; font-family: 'Montserrat', sans-serif; font-weight: bold; letter-spacing: 2px; text-shadow: 0 4px 6px rgba(0, 0, 0, 0.2); animation: fadeIn 2s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
header p { font-size: 1.5rem; margin-top: 20px; opacity: 0.9; animation: fadeIn 2.5s ease-in-out; }
.container { max-width: 1200px; margin: 0 auto; padding: 20px; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { background: rgba(255, 255, 255, 0.1); border-radius: 10px; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out; overflow: hidden; }
.card:hover { transform: scale(1.05); box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2); }
.card img { width: 100%; height: auto; display: block; }
.card-content { padding: 20px; }
.card-content h3 { font-size: 1.5rem; font-family: 'Montserrat', sans-serif; font-weight: bold; margin-bottom: 10px; color: #18BC9C; }
.card-content p { font-size: 1rem; color: #fff; }
footer { background: #2C3E50; color: #fff; text-align: center; padding: 20px; margin-top: 40px; }
@media (max-width: 768px) { header h1 { font-size: 3rem; } .container { grid-template-columns: 1fr; } }
@media (min-width: 1440px) { .container { grid-template-columns: repeat(3, 1fr); } }