@media only screen and (max-width: 1000px) {
.pictures{grid-template-columns:repeat(1,1fr)}
.pictures .pict_keramzit1,.pictures .pict_keramzit2{width:100%;margin:15px auto 5px}
}
@media only screen and (max-width: 700px) {
.up{font:bold 1em Arial,sans-serif}
}
@media only screen and (max-width: 550px) {
#textKeramzit{font:bold 1em Arial,sans-serif}
}
@media only screen and (max-width: 450px) {
#textKeramzit{font:.9em Arial,sans-serif}
}