*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f5f7fa;
    color:#333;
}
header{
    background:#1f2937;
    color:white;
    text-align:center;
    padding:40px;
}
header p{
    margin-top:10px;
}
#fechaHora{
    margin-top:20px;
    font-size:18px;
    font-weight:bold;
    color:#4ade80;
}
main{
    width:90%;
    max-width:1000px;
    margin:40px auto;
}
.card{
    background:white;
    margin-bottom:25px;
    padding:25px;
    border-radius:12px;
    box-shadow:0 4px 12px rgba(0,0,0,.15);
}
.card h2{
    margin-bottom:15px;
    color:#2563eb;
}
ul{
    padding-left:20px;
}
.proyecto{
    margin-bottom:20px;
    padding:15px;
    border-left:5px solid #2563eb;
    background:#f8fafc;
}
footer{
    text-align:center;
    padding:20px;
    background:#1f2937;
    color:white;
}
@media(max-width:768px){
    header{
        padding:25px;
    }
    .card{
        padding:18px;
    }
}