*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial, Helvetica, sans-serif;
}

body{
    background:#f4f6f8;
    color:#333;
    line-height:1.6;
}

header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:15px 40px;
    background:#111;
}

.logo img{
    width:120px;
    border-radius:6px;
}

nav ul{
    list-style:none;
    display:flex;
    gap:25px;
}

nav ul li a{
    text-decoration:none;
    color:#fff;
    font-weight:600;
    transition:0.3s;
}

nav ul li a:hover{
    color:#00bcd4;
}

main{
    max-width:1100px;
    margin:auto;
    padding:40px 20px;
}

h1{
    font-size:42px;
    margin-bottom:15px;
    color:#111;
}

p{
    margin-bottom:20px;
    color:#555;
}

a button{
    padding:12px 25px;
    margin-right:10px;
    border:none;
    border-radius:25px;
    background:#00bcd4;
    color:#fff;
    font-size:16px;
    cursor:pointer;
    transition:0.3s;
}

a button:hover{
    background:#0097a7;
}

article{
    background:#fff;
    padding:30px;
    margin-top:40px;
    border-radius:10px;
    box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

article h2{
    margin-bottom:15px;
    font-size:28px;
    color:#111;
}

aside{
    background:#fff;
    padding:25px;
    margin-top:40px;
    border-radius:10px;
    box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

aside h3{
    margin-bottom:15px;
    font-size:22px;
    color:#111;
}

footer{
    background:#111;
    color:#fff;
    text-align:center;
    padding:15px;
    margin-top:50px;
}

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

    nav ul{
        flex-direction:column;
        align-items:center;
    }

    h1{
        font-size:32px;
    }

    a button{
        margin-bottom:10px;
    }
}