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

body{
    font-family:Arial, sans-serif;
    background:#f4f6f9;
    color:#333;
}

.header{
    background:#0d47a1;
    color:white;
    padding:15px 25px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.logo-area{
    display:flex;
    align-items:center;
    gap:12px;
}

.logo-area img{
    height:45px;
}

.user-area a{
    color:white;
    text-decoration:none;
    font-weight:bold;
}

.nav{
    background:white;
    padding:12px 25px;
    box-shadow:0 2px 6px rgba(0,0,0,.1);
}

.nav a{
    color:#0d47a1;
    text-decoration:none;
    margin-right:18px;
    font-weight:bold;
}

.container{
    max-width:1200px;
    margin:25px auto;
    padding:0 20px;
}

.card{
    background:white;
    padding:20px;
    border-radius:12px;
    box-shadow:0 2px 8px rgba(0,0,0,.08);
    margin-bottom:20px;
}

.grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:20px;
}

.stat{
    background:white;
    padding:25px;
    border-radius:12px;
    box-shadow:0 2px 8px rgba(0,0,0,.08);
}

.stat h3{
    color:#0d47a1;
    margin-bottom:10px;
}

.btn{
    display:inline-block;
    background:#0d47a1;
    color:white;
    padding:10px 16px;
    border-radius:6px;
    text-decoration:none;
    border:none;
    cursor:pointer;
}

.footer{
    text-align:center;
    color:#777;
    padding:20px;
    font-size:14px;
}

@media(max-width:768px){
    .header{
        flex-direction:column;
        gap:10px;
        text-align:center;
    }

    .nav a{
        display:block;
        margin:8px 0;
    }
}

.tabla {
    width: 100%;
    border-collapse: collapse;
}

.tabla th {
    background: #0d47a1;
    color: white;
    padding: 12px;
    text-align: left;
}

.tabla td {
    padding: 12px;
    border-bottom: 1px solid #ddd;
}

.tabla tr:hover {
    background: #f5f5f5;
}

label{
    display:block;
    margin-top:15px;
    font-weight:bold;
}

input,
select,
textarea{
    width:100%;
    padding:10px;
    margin-top:5px;
    border:1px solid #ccc;
    border-radius:6px;
}

textarea{
    min-height:90px;
}