body {
margin: 0;
padding: 0;
background-color: #0a0a0a;
font-family: "Source Sans 3", calibri, arial, serif;
font-size: 16px;
color: #ffffff;
display: flex;
flex-direction: column;
min-height: 100vh;
}

h1 {
font-size: 24px;
font-weight: normal;
}

.dell:hover, .hp:hover, .compaq:hover, .lenovo:hover, .ibm:hover, 
.acer:hover, .gateway:hover, .emachines:hover, .packardbell:hover,
.panasonic:hover {
cursor: pointer;
filter: brightness(1.2);
}

.ibm {
margin-right: 20px;
}

.page {
margin: 20px auto auto auto; 
width: 800px; 
border-radius: 10px; 
padding: 10px; 
box-sizing: border-box;
background-color: #000000;
}

.systems {
display: flex; 
justify-content: center; 
align-items: center;
}

.sysblock {
width: 200px; 
height: 200px; 
margin: 10px 0px 20px 0px;
}

.syscontent {
display: flex; 
justify-content: center; 
align-items: center; 
height: 200px;
}

.mtop {
background-color: #000000; 
flex: 1;
}

.back {
margin: 0px; 
padding: 0px; 
border: 1px solid #0a0a0a; 
background: #111111; 
width: 36px; 
height: 36px; 
border-radius: 10px; 
display: flex; 
justify-content: center;
align-items: center;
cursor: pointer;
}

.back:hover {
filter: brightness(1.6);
}

.back-icon {
height: 20px; 
width: 26px;
}

h1 {
margin: 0px 0px 0px 10px;
}

.disclaimer {
text-align: center;
color: #808080;
}

@media (max-width: 600px) {
.page {
width: 350px;
background-color: #000000;
}

.systems {
display: flex;
justify-content: center;
flex-direction: column;
}
}

@media (max-width:600px) {
.abouthov {
display: none;
}
}

@media (min-width: 768px) {
body {
background-color: #000000;
}
}