body{
    margin:0;
    font-family: Arial, Helvetica, sans-serif;
    background:#f5f7fa;
    color:#222;
    line-height:1.6;
}

header{
    background:#0b2c4d;
    color:#fff;
    padding:15px;
    text-align:center;
}

header h1{
    margin:5px 0;
    font-size:22px;
}

header p{
    margin:0;
    font-size:14px;
}

nav{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    background:#123b63;
}

nav a{
    color:#fff;
    text-decoration:none;
    padding:10px 12px;
    font-size:14px;
}

nav a:hover{
    background:#0b2c4d;
}

.container{
    max-width:900px;
    margin:auto;
    padding:15px;
}

section{
    background:#fff;
    padding:15px;
    margin-bottom:15px;
    border-radius:6px;
    box-shadow:0 0 6px rgba(0,0,0,0.05);
}

section h2{
    margin-top:0;
    color:#0b2c4d;
    border-botto