* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

header {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), 
                url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&q=80&w=1600') no-repeat center center/cover;
    height: 100vh;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

nav {
    position: absolute;
    top: 20px;
    width: 100%;
    padding: 0 50px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    background: #27ae60;
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 25px;
    margin-top: 20px;
    transition: background 0.3s;
}

.btn:hover {
    background: #2ecc71;
}

.features {
    display: flex;
    justify-content: space-around;
    padding: 80px 50px;
    background: #f4f4f4;
}

.card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    width: 30%;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
}

footer {
    text-align: center;
    padding: 40px;
    background: #2c3e50;
    color: white;
}