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

body{
    font-family: "Segoe UI", Arial, sans-serif;
    background:#eef6f7;
    color:#1f2937;
    line-height:1.8;
}

header{
    background:linear-gradient(135deg,#0f766e,#2563eb);
    color:white;
    text-align:center;
    padding:50px 20px;
}

header h1{
    font-size:2.5rem;
    margin-bottom:10px;
}

header p{
    opacity:.9;
    font-size:1.05rem;
}

nav{
    margin-top:20px;
}

nav a{
    color:white;
    text-decoration:none;
    margin:0 12px;
    font-weight:600;
}

nav a:hover{
    text-decoration:underline;
}

main{
    max-width:900px;
    margin:40px auto;
    background:white;
    padding:40px;
    border-radius:16px;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
}

section{
    margin-bottom:40px;
}

h2{
    color:#0f766e;
    margin-bottom:15px;
    border-left:5px solid #0f766e;
    padding-left:12px;
}

h3{
    margin:20px 0 10px;
    color:#1d4ed8;
}

p{
    margin-bottom:16px;
}

ul{
    padding-left:22px;
}

li{
    margin-bottom:10px;
}

a{
    color:#2563eb;
    text-decoration:none;
    font-weight:600;
}

a:hover{
    text-decoration:underline;
}

.button{
    display:inline-block;
    margin-top:15px;
    padding:12px 22px;
    background:#2563eb;
    color:white;
    border-radius:10px;
    text-decoration:none;
    transition:.25s;
}

.button:hover{
    background:#1d4ed8;
}

footer{
    text-align:center;
    padding:30px;
    color:#6b7280;
    font-size:.9rem;
}

hr{
    border:none;
    border-top:1px solid #e5e7eb;
    margin:35px 0;
}


@media (max-width:768px){

    header h1{
        font-size:2rem;
    }

    nav a{
        display:inline-block;
        margin:6px 8px;
    }

    main{
        margin:20px;
        padding:24px;
    }

}