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CSS Grid Layout with @support flexbox fallback

HTML
<header class="header"> <h1>CSS Grid Layout</h1> <h2>With @support flexbox fallback.</h2> </header> <div class="grid "> <div class="item" tabindex="1"> <div class="box"> <div class="diamond"><span>1</span></div> <div class="tooltip">grid-area: hero</div> </div> </div> <div class="item" tabindex="2"> <div class="box"> <div class="diamond"><span>2</span></div> <div class="tooltip">grid-area: big</div> </div> </div> <div class="item" tabindex="3"> <div class="box"> <div class="diamond"><span>3</span></div> <div class="tooltip">grid-area: medium</div> </div> </div> <div class="item" tabindex="4"> <div class="box"> <div class="diamond"><span>4</span></div> <div class="tooltip">grid-area: medium</div> </div> </div> <div class="item" tabindex="5"> <div class="box"> <div class="diamond"><span>5</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="6"> <div class="box"> <div class="diamond"><span>6</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="7"> <div class="box"> <div class="diamond"><span>7</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="8"> <div class="box"> <div class="diamond"><span>8</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="9"> <div class="box"> <div class="diamond"><span>9</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="10"> <div class="box"> <div class="diamond"><span>10</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="11"> <div class="box"> <div class="diamond"><span>11</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="12"> <div class="box"> <div class="diamond"><span>12</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="13"> <div class="box"> <div class="diamond"><span>13</span></div> <div class="tooltip">grid-area: small</div> </div> </div> <div class="item" tabindex="14"> <div class="box"> <div class="diamond"><span>14</span></div> <div class="tooltip">grid-area: small</div> </div> </div> </div>
CSS
@supports (display: grid) { .grid { display: grid; grid-gap: 1.5vw; min-height: 100vh; padding: 1.5vw; } .grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: 50vh 30vh repeat(7, minmax(20vh, 1fr)); grid-template-areas: "hero hero" "big1 big1" "med1 med1" "med2 med2" "small1 small2" "small3 small4" "small5 small6" "small7 small8" "small9 small10"; } @media screen and (min-width: 750px) { .grid { grid-template-columns: repeat(5, 1fr); grid-template-rows: repeat(5, 25vh); grid-template-areas: "hero hero hero med1 med1" "hero hero hero med2 med2" "big1 big1 big1 big1 big1" "small1 small2 small3 small4 small5" "small6 small7 small8 small9 small10"; } } @media screen and (min-width: 1400px) { .grid { grid-template-columns: repeat(6, 1fr); grid-template-rows: auto; grid-template-areas: "small1 hero hero hero med1 med1" "small2 hero hero hero med2 med2" "small3 small5 big1 big1 small7 small8" "small4 small6 big1 big1 small9 small10"; } } .grid .item:nth-child(1) { grid-area: hero; } .grid .item:nth-child(2) { grid-area: big1; } .grid .item:nth-child(3) { grid-area: med1; } .grid .item:nth-child(4) { grid-area: med2; } .grid .item:nth-child(5) { grid-area: small1; } .grid .item:nth-child(6) { grid-area: small2; } .grid .item:nth-child(7) { grid-area: small3; } .grid .item:nth-child(8) { grid-area: small4; } .grid .item:nth-child(9) { grid-area: small5; } .grid .item:nth-child(10) { grid-area: small6; } .grid .item:nth-child(11) { grid-area: small7; } .grid .item:nth-child(12) { grid-area: small8; } .grid .item:nth-child(13) { grid-area: small9; } .grid .item:nth-child(14) { grid-area: small10; } } /* flexbox fallback is the browser does not support display:grid */ @supports not (display: grid) { .grid { display: flex; flex-flow: row wrap; min-height: 100vh; padding: 0.75vw; } .grid .item { min-height: 20vh; margin: 0.75vw; } .grid .item:nth-child(1) { flex: 0 1 calc(100% - 1.5vw); height: 50vh; } .grid .item:nth-child(2) { flex: 0 1 calc(100% - 1.5vw); height: 30vh; } .grid .item:nth-child(3) { flex: 0 1 calc(100% - 1.5vw); } .grid .item:nth-child(4) { flex: 0 1 calc(100% - 1.5vw); } .grid .item:nth-child(5) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(6) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(7) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(8) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(9) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(10) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(11) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(12) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(13) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(14) { flex: 0 1 calc(50% - 1.5vw); } @media screen and (min-width: 750px) { .grid .item:nth-child(1) { flex: 0 1 calc(60% - 1.5vw); } .grid .item:nth-child(2) { flex: 0 1 calc(40% - 1.5vw); height: 50vh; } } @media screen and (min-width: 1400px) { .grid .item:nth-child(1) { flex: 0 1 calc(60% - 1.5vw); } .grid .item:nth-child(2) { flex: 0 1 calc(40% - 1.5vw); } .grid .item:nth-child(3) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(4) { flex: 0 1 calc(50% - 1.5vw); } .grid .item:nth-child(5) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(6) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(7) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(8) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(9) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(10) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(11) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(12) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(13) { flex: 0 1 calc(25% - 1.5vw); } .grid .item:nth-child(14) { flex: 0 1 calc(25% - 1.5vw); } } } /* Styles, just for fun */ *,*:before,*:after { box-sizing: border-box; } body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"; background: #29343d; } @supports not (display: grid) { body:before { content: 'Sorry, seems like your browser doesn\'t support display: grid. Below is the flexbox fallback.'; display: block; padding: 2rem 2rem 0; color: #ffffff; text-align: center; } } .header { margin: 10vh 1.5vw; text-align: center; color: #cedfe9; } .header h1, .header h2 { margin: 0; text-transform: uppercase; letter-spacing: 0.2em; line-height: 1; } .header h1 { position: relative; padding-bottom: 0.5em; color: #ffffff; font-size: 2rem; } .header h2 { font-weight: normal; font-size: 0.875rem; } @media screen and (min-width: 750px) { .header h1 { font-size: 3.75rem; } .header h2 { font-weight: normal; font-size: 1.125rem; letter-spacing: 0.5em; } } @media screen and (min-width: 1400px) { .header h1 { font-size: 6rem; } .header h2 { font-weight: normal; font-size: 1.5rem; } } .box { display: flex; justify-content: center; align-items: center; height: 100%; } .diamond { display: flex; justify-content: center; align-items: center; position: relative; z-index: 2; width: 50px; height: 50px; border-radius: 5px; border: 1px solid #ffffff; box-shadow: 1px 1px 0px rgba(0,0,0,0.2); background-image: linear-gradient(to top left, #ddd 0%, #fff 100%); text-align: center; transform-origin: center; transform: rotateZ(45deg); transition: box-shadow 250ms, transform 250ms; } .diamond span { font-weight: bold; transform: rotateZ(-45deg) } .grid .item:hover .diamond, .grid .item:focus .diamond { box-shadow: 2px 2px 2px rgba(0,0,0,0.2); transform: rotateZ(45deg) scale(1.2); } .tooltip { position: absolute; z-index: 1; padding: 0.25rem 1rem; border-radius: 5px; background: #29343d; opacity: 0; color: #cedfe9; font-size: 0.875rem; transition: opacity 500ms, transform 500ms; } .tooltip:before { content: ''; position: absolute; top: -9px; left: calc(50% - 10px); width: 0; height: 0; border-left: 10px solid transparent; border-right: 10px solid transparent; border-bottom: 10px solid #29343d; } .grid .item:hover .tooltip, .grid .item:focus .tooltip { opacity: 1; transform: translateY(70px); } .grid .item { position: relative; padding: 1vw; background-position: left bottom; background-size: 150% 100%; transition: background 500ms, outline 500ms; background-position: top left; outline: transparent; } .grid .item:hover, .grid .item:focus { background-position: top right; } .grid .item:focus { outline: 2px solid #3eabfa; } .grid .item:nth-child(1) { background-image: linear-gradient(45deg, #cbabfb 0%, #fb7ef6 60%); } .grid .item:nth-child(2) { background-image: linear-gradient(45deg, #fb7ef6 0%, #cbabfb 60%); } .grid .item:nth-child(3) { background-image: linear-gradient(45deg, #70c1fb 0%, #79ebe0 60%); } .grid .item:nth-child(4) { background-image: linear-gradient(45deg, #79ebe0 0%, #70c1fb 60%); } .grid .item:nth-child(5), .grid .item:nth-child(6), .grid .item:nth-child(7), .grid .item:nth-child(8), .grid .item:nth-child(9), .grid .item:nth-child(10), .grid .item:nth-child(11), .grid .item:nth-child(12), .grid .item:nth-child(13), .grid .item:nth-child(14) { background-image: linear-gradient(45deg, #feeeab 0%, #fb7eb3 60%); }
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