Restructure our python module. A lot.

src/pretix/presale/static/pretixpresale/js/ui/main.js

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+"use strict";
+$(function () {
+});

src/pretix/presale/static/pretixpresale/less/event.less

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+.product-row {
+    border-top: 1px solid @table-border-color;
+
+    &.headline, &.simple {
+        border-top: 2px solid @table-border-color;
+    }
+    &:last-child {
+        border-bottom: 2px solid @table-border-color;
+    }
+    p:last-child {
+        margin-bottom: 0;
+    }
+
+    .input-item-count {
+        text-align: center;
+    }
+    .availability-box {
+        text-align: center;
+
+        &.gone {
+            color: @alert-danger-text;
+        }
+        &.unavailable {
+            color: @alert-warning-text;
+        }
+    }
+}
+.cart-row, .product-row {
+    padding: 10px 0;
+
+    .count form {
+        display: inline;
+    }
+    .price, .count {
+        text-align: right;
+    }
+    .price small,
+    .availability-box small {
+        display: block;
+        line-height: 1;
+    }
+
+    &.total {
+        border-top: 1px solid @table-border-color;
+    }
+}
+.checkout-button-row {
+    padding: 15px 0;
+}

src/pretix/presale/static/pretixpresale/less/main.less

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+@import "../../../../base/static/bootstrap/less/bootstrap.less";
+@import "../../../../base/static/fontawesome/less/font-awesome.less";
+@fa-font-path: "../../fontawesome/fonts";
+
+@import "event.less";