* {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    margin: 0;
    background: #0f0f0f;
    color: #fff;
}

header {
    text-align: center;
    padding: 30px;
    background: #111;
    border-bottom: 1px solid #222;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header p {
    color: #aaa;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    padding: 30px;
}

.card {
    background: #161616;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #222;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 15px rgba(255,255,255,0.05);
}

.card h2 {
    margin-top: 0;
    color: #00ffaa;
}

footer {
    text-align: center;
    padding: 15px;
    background: #111;
    border-top: 1px solid #222;
    color: #777;
}