feat: added callback

assets/scss/_l-callback.scss

@@ -0,0 +1,86 @@
+.callback {
+  position: relative;
+  z-index: 100;
+  margin: 100px 0 0;
+
+  @include tablet {
+    margin: 60px 0 0;
+  }
+
+  &__title {
+    margin: 21px 0;
+    color: $white;
+
+    @include tablet {
+      margin: 21px 0 15px;
+    }
+
+    & > span {
+      color: $white;
+    }
+  }
+
+  &__wrapper {
+    padding: 42px 64px;
+    border-radius: 60px 10px;
+    background: url(../img/grid.svg) center no-repeat;
+    background-color: $blue;
+
+    @include desktop {
+      padding: 40px 16px;
+      margin: 0 -15px;
+    }
+  }
+
+  &__description {
+    max-width: 900px;
+    margin: 0 auto 35px;
+    font-weight: 400;
+    font-size: 21px;
+    line-height: 139%;
+    text-align: center;
+    color: $white;
+
+    @include tablet {
+      margin: 14px 0 37px;
+      font-size: 16px;
+    }
+  }
+
+  &__form {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    flex-wrap: wrap;
+    gap: 20px;
+    margin: 0 0 27px;
+
+    & > * {
+      flex: 0 0 calc(100% / 3 - 20px / 3 * 2);
+
+      @include desktop {
+        flex: 0 0 calc(100% / 2 - 20px / 2);
+      }
+
+      @include tablet {
+        flex: 1 1 100%;
+      }
+    }
+
+    & > .button {
+      max-width: none;
+      justify-content: center;
+      padding-left: 24px;
+      padding-right: 24px;
+    }
+  }
+
+  &__disclaimer {
+    font-weight: 300;
+    font-size: 14px;
+    line-height: 138%;
+    letter-spacing: 0.01em;
+    text-align: center;
+    color: rgba($color: $white, $alpha: 0.4);
+  }
+}