body{
    margin:0;
    font-family:Arial, Helvetica, sans-serif;
    color:#1f2937;
    line-height:1.6;
    background:#ffffff;
}

.container{
    width:90%;
    max-width:1200px;
    margin:auto;
}

.narrow{
    max-width:850px;
}

header{
    background:#0f172a;
    color:#fff;
    padding:18px 0;
    position:sticky;
    top:0;
}

.nav-container{
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.logo{
    font-weight:700;
    font-size:1.2rem;
}

nav a{
    color:#fff;
    text-decoration:none;
    margin-left:20px;
}

.hero{
    background:linear-gradient(135deg,#2563eb,#7c3aed);
    color:#fff;
    text-align:center;
    padding:110px 20px;
}

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

.hero p{
    max-width:700px;
    margin:0 auto 30px;
    font-size:1.1rem;
}

.hero-buttons{
    display:flex;
    justify-content:center;
    gap:15px;
    flex-wrap:wrap;
}

.btn{
    display:inline-block;
    padding:14px 28px;
    border-radius:8px;
    text-decoration:none;
    font-weight:bold;
}

.primary{
    background:#ffffff;
    color:#2563eb;
}

.secondary{
    background:transparent;
    color:#ffffff;
    border:2px solid #ffffff;
}

.features{
    padding:70px 0;
}

.features h2{
    text-align:center;
    margin-bottom:40px;
}

.cards{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:30px;
}

.card{
    background:#fff;
    padding:30px;
    border-radius:12px;
    box-shadow:0 4px 18px rgba(0,0,0,0.08);
}

.content{
    background:#f8fafc;
    padding:70px 0;
}

footer{
    background:#0f172a;
    color:#fff;
    text-align:center;
    padding:30px 20px;
}

.small{
    font-size:0.85rem;
    opacity:0.85;
}

@media(max-width:768px){
    .nav-container{
        flex-direction:column;
        gap:15px;
    }

    nav a{
        margin:0 10px;
    }

    .hero h1{
        font-size:2.2rem;
    }
}