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src/style.css

+* {
+    margin: 0px;
+    padding: 0px;
+    box-sizing: border-box;
+}
+
+ul {
+    list-style: none;
+}
+
+.app {
+    margin: 0px auto;
+    width: 80%;
+    height: 100vh;
+    background-color: lightblue;
+}
+
+.title {
+    font-size: 50%;
+    text-align: center;
+    height: 8vh;
+    line-height: 8vh;
+}
+
+.game {
+    width: 100%;
+    height: 70vh;
+    border-bottom: 1px solid gray;
+}
+
+.info {
+    width: 100%;
+    height: 22vh;
+    line-height: 22vh;
+    margin: 0px auto;
+}
+
+.box {
+    width: 33.3%;
+    height: 23.3vh;
+    position: relative;
+    float: left;
+    text-align: center;
+    font-size: 3rem;
+    line-height: 23.3vh;
+}
+
+.top {
+    left: 33.3%;
+}
+
+.left {
+    left: -33.3%;
+    top: 23.3vh;
+}
+
+.right {
+    right: 0px;
+    top: 23.3vh;
+}
+
+.bottom {
+    left: 33.3%;
+    top: 23.3vh;
+}
+
+.center {
+    background-color: skyblue;
+    border-radius: 90px;
+    text-align: center;
+    font-size: 50%;
+    line-height: 23.3vh;
+    cursor: pointer;
+    color: gray;
+}
+
+.center:hover {
+    background-color: rgb(55, 176, 224);
+    color: white;
+}
+
+.bottom_box {
+    width: 16.7%;
+    height: 7.3vh;
+    line-height: 7.3vh;
+    float: left;
+    background-color: lightslategray;
+    position: relative;
+    text-align: center;
+}
+
+.bottom_top {
+    border-radius: 90px 90px 0px 0px;
+    left: 42%;
+}
+
+.bottom_left {
+    border-radius: 90px 0px 0px 90px;
+    top: 33%;
+    left: 8.6%;
+}
+
+.bottom_right {
+    border-radius: 0px 90px 90px 0px;
+    top: 33%;
+    left: 25.3%;
+}
+
+.bottom_bottom {
+    border-radius: 0px 0px 90px 90px;
+    top: 66%;
+    left: -8.1%;
+}
+
+.bottom_center {
+    width: 30%;
+    background-color: lightblue;
+    font-size: 50%;
+}
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