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

body{
    font-family: Arial, sans-serif;
    background:#f4f4f4;
    line-height:1.6;
}

header{
    background:#5f1e8a;
    color:white;
    padding:15px;
    text-align:center;
}

nav ul{
    list-style:none;
    margin-top:10px;
}

nav ul li{
    display:inline;
    margin:0 15px;
}

nav a{
    color:white;
    text-decoration:none;
    font-weight:bold;
}

.banner{
    background:#7125eb;
    color:white;
    text-align:center;
    padding:50px 20px;
}

section{
    background:white;
    margin:20px;
    padding:20px;
    border-radius:10px;
}

.card{
    background:#f3e0ff;
    padding:15px;
    margin:10px 0;
    border-radius:8px;
}

button{
    margin-top:15px;
    padding:10px 15px;
    border:none;
    background:#6a25eb;
    color:white;
    border-radius:5px;
    cursor:pointer;
}

button:hover{
    background:#741dd8;
}

footer{
    background:#3e1e8a;
    color:white;
    text-align:center;
    padding:15px;
    margin-top:20px;
}

.imagen{
    width:100%;
    max-width:700px;
    display:block;
    margin:20px auto;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,0.2);
}

a{
    color:#6a25eb;
    font-weight:bold;
}

a:hover{
    color:#451eaf;
}

section{
    transition:0.3s;
}

section:hover{
    transform:translateY(-3px);
}

.dark-mode{
    background-color:#121212;
    color:white;
}

.dark-mode section{
    background:#1f1f1f;
    color:white;
}

.dark-mode .card{
    background:#2d2d2d;
}

#modoBtn{
    margin-top:15px;
    padding:10px 15px;
    border:none;
    border-radius:5px;
    cursor:pointer;
    background:white;
    color:#1e3a8a;
    font-weight:bold;
}