first commit

assets/css/components/_btn--don.scss

@@ -0,0 +1,60 @@
+#btn--don__mobile {
+  width: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  padding-top: calc(var(--spacing) * 0.5);
+  padding-bottom: calc(var(--spacing) * 1.5);
+  position: fixed;
+  bottom: 0px;
+  left: 0;
+  z-index: 100;
+  opacity: 0;
+  transition: opacity ease-in 0.2s;
+
+  pointer-events: none;
+  &.is-visible {
+    pointer-events: all;
+    opacity: 1;
+  }
+
+  &.is-sticky {
+    position: relative;
+  }
+
+  @media #{$small-up} {
+    display: none !important;
+  }
+}
+
+.btn--don {
+  --vertical-padding: 0.5ch;
+  height: calc(var(--h-block) + var(--vertical-padding));
+  border-radius: calc(var(--h-block) / 1);
+  padding: var(--vertical-padding) 2ch;
+  background-color: var(--color-accent);
+  color: var(--color-bg);
+  font-family: var(--font);
+  font-size: var(--fs-medium);
+  font-weight: var(--fw-bold);
+
+  a {
+    text-decoration: none;
+    display: flex;
+    align-items: center;
+    gap: 0.5ch;
+  }
+
+  .icon {
+    height: 28px;
+    position: relative;
+    top: 1px;
+  }
+
+  svg {
+    fill: var(--color-bg);
+    width: 24px;
+    height: 24px;
+  }
+}