body { margin: 0; font-family: Arial, sans-serif; background: #f9f9f9; color: #333; line-height: 1.6; overflow-x: hidden; }
header { background: #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.1); position: relative; z-index: 10; }
.container { max-width: 1400px; margin: 0 auto; padding: 0 20px; }
nav { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; }
.logo { font-size: 24px; font-weight: bold; color: #007BFF; text-transform: uppercase; letter-spacing: 1px; }
nav ul { list-style: none; display: flex; gap: 20px; }
nav a { text-decoration: none; color: #333; transition: color 0.3s ease; }
nav a:hover { color: #007BFF; }
main { padding: 40px 0; }
.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.card { background: #fff; border-radius: 8px; 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-title { font-size: 20px; margin-bottom: 10px; color: #007BFF; }
.card-text { font-size: 16px; color: #555; }
.section-title { font-size: 36px; text-align: center; margin-bottom: 40px; position: relative; }
.section-title::after { content: ''; display: block; width: 50px; height: 3px; background: #007BFF; margin: 10px auto 0; }
@media (max-width: 768px) { 
    .grid-container { grid-template-columns: 1fr; }
    .section-title { font-size: 28px; }
    nav ul { flex-direction: column; gap: 10px; }
}
.fade-in { animation: fadeIn 1s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.tooltip { position: absolute; background: rgba(0,0,0,0.8); color: #fff; padding: 5px 10px; border-radius: 4px; font-size: 14px; pointer-events: none; opacity: 0; transition: opacity 0.2s ease; }
.tooltip.visible { opacity: 1; }
footer { background: #007BFF; color: #fff; text-align: center; padding: 20px 0; margin-top: 40px; }