👍 ラジオボタンを追加

scss/base/_index.scss

@@ -3,3 +3,4 @@
 @import "reset.scss";
 @import "variables.scss";
 @import "generic.scss";
+@import "animation.scss";

scss/base/animation.scss

@@ -0,0 +1,9 @@
+@keyframes blink {
+  0% {
+    opacity: 1;
+  }
+
+  50% {
+    opacity: 0;
+  }
+}

scss/elements/_index.scss

@@ -2,4 +2,5 @@
 
 @import "title.scss";
 @import "button.scss";
+@import "radio.scss";
 @import "container.scss";

scss/elements/radio.scss

@@ -0,0 +1,44 @@
+.radios {
+  display: flex;
+  align-items: center;
+  justify-content: flex-start;
+
+  &:not(:last-child) {
+    margin-bottom: 1.5rem;
+  }
+
+  > label {
+    display: flex;
+    cursor: pointer;
+
+    &:not(:last-child) {
+      margin-right: 1rem;
+    }
+
+    > .radio[type="radio"] {
+      margin-right: 0.3rem;
+      vertical-align: middle;
+      cursor: pointer;
+      visibility: hidden;
+
+      &::before {
+        visibility: visible;
+        content: "";
+        animation: blink 1s infinite steps(1);
+      }
+
+      &:checked::before {
+        content: "\203A";
+      }
+    }
+  }
+
+  &.-columns {
+    flex-direction: column;
+    align-items: flex-start;
+
+    > label:not(:last-child) {
+      margin-bottom: 0.5rem;
+    }
+  }
+}