:root{
    --primary:#0a58ca;
    --light:#f4f7fb;
}
body{
    margin:0;
    font-family:Arial, Helvetica, sans-serif;
    background:linear-gradient(135deg,#eef3ff,#ffffff);
    color:#333;
    line-height:1.8;
}
header{
    background:linear-gradient(135deg,var(--primary),#06357a);
    color:#fff;
    padding:70px 20px;
    text-align:center;
}
header h1{
    font-size:38px;
}
.container{
    max-width:1100px;
    margin:auto;
    padding:60px 20px;
}
.card{
    background:#fff;
    padding:40px;
    border-radius:15px;
    box-shadow:0 15px 40px rgba(0,0,0,.08);
}
a{
    color:var(--primary);
    font-weight:600;
    text-decoration:none;
}
a:hover{ text-decoration:underline; }
.social a{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:45px;
    height:45px;
    margin:10px 10px 0 0;
    border-radius:50%;
    background:var(--primary);
    color:#fff;
    font-size:20px;
    transition:.3s;
}
.social a:hover{
    background:#000;
    transform:scale(1.1);
}
footer{
    text-align:center;
    padding:25px;
    font-size:14px;
    color:#666;
}
.whatsapp{
    position:fixed;
    bottom:25px;
    right:25px;
    background:#25D366;
    color:#fff;
    width:60px;
    height:60px;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:32px;
    box-shadow:0 10px 25px rgba(0,0,0,.3);
    animation:pulse 1.8s infinite;
}
@keyframes pulse{
    0%{box-shadow:0 0 0 0 rgba(37,211,102,.6)}
    70%{box-shadow:0 0 0 18px rgba(37,211,102,0)}
    100%{box-shadow:0 0 0 0 rgba(37,211,102,0)}
}