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

body{
    font-family:Arial, sans-serif;
    background:#eef5ff;
}

.layout{
    display:flex;
    min-height:100vh;
}

.menu-lateral{
    width:260px;
  background: linear-gradient(
        135deg,
        rgb(65, 120, 172),
        rgb(134,196,255)
    );
    padding:20px;
}

.logo-menu{
    width:100px;
    display:block;
    margin:auto;
    margin-bottom:15px;
}

.menu-lateral h2{
    text-align:center;
    color:white;
    margin-bottom:25px;
}

.menu-lateral a{
    display:block;
    color:white;
    text-decoration:none;
    padding:14px;
    margin-bottom:10px;
    border-radius:12px;
    transition:.3s;
}

.menu-lateral a:hover{
    background:rgba(255,255,255,.15);
}

.activo{
    background:white;
    color:rgb(111,173,255) !important;
    font-weight:bold;
}

.contenido{
    flex:1;
    padding:30px;
    
}

h1{
    color:#0f4481;
    margin-bottom:25px;
}

details{
    margin-bottom:12px;
}

summary{
    cursor:pointer;
    padding:15px;
    border-radius:12px;
    background:white;
    border:2px solid #c5dbff;
    color:rgb(111,173,255);
    font-weight:bold;
        box-shadow:0 5px 15px rgba(96, 165, 255, 0.473);

}

.materia{
    margin-top:10px;
    margin-left:25px;
        box-shadow:0 5px 15px rgba(96, 165, 255, 0.473);

}

.notas{
    background:#f5f9ff;
    border-left:5px solid #1976d2;
    padding:15px;
    margin-top:10px;
    border-radius:10px;
        box-shadow:0 5px 15px rgba(96, 165, 255, 0.473);

}

.notas p{
    margin:6px 0;
}