.books{display:flex;flex-wrap:wrap;margin:50px 0 0}.book{align-items:center;display:flex;flex-direction:column;margin:0 70px 70px 0}.book-cover:focus img,.book-cover:hover img{outline:2px solid var(--main-color)}.book-more{background:var(--main-color);color:#fff;display:block;font-family:var(--font-poppins-bold);font-size:18px;line-height:30px;margin:10px 0;text-align:center;text-decoration:none;transition:all .3s ease;width:150px}.book-more:focus,.book-more:hover{background:var(--main-color-dark)}.navigation{display:flex;justify-content:center;list-style-type:none;margin:0 0 50px;padding:0}.nav-elem a,.nav-elem strong{background:var(--main-color);border-radius:5px;color:#fff;display:block;font-size:20px;height:40px;line-height:40px;margin:0 10px;text-align:center;text-decoration:none;transition:all .3s ease;width:40px}.nav-elem a:focus,.nav-elem a:hover{background:var(--main-color-dark)}.nav-elem.active{font-weight:700}@media (max-width:1100px){.book{margin:0 30px 30px 0}.book-cover img{max-width:300px}}@media (max-width:600px){.books{justify-content:center}.book{margin:0 0 30px}}@media (max-width:400px){.book-cover img{max-width:250px}}