diff --git a/Gruntfile.js b/Gruntfile.js
index f506339..ee89b15 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -7,18 +7,21 @@ module.exports = grunt => {
             default: ["dist/"],
         },
         copy: {
+            css: {
+                files: [{expand: true, cwd: "src/main/", src: "**/*.css", dest: "dist/", flatten: true}],
+            },
             html: {
-                files: [{expand: true, cwd: "src/main/", src: "**/*.html", dest: "dist/", flatten: true}]
+                files: [{expand: true, cwd: "src/main/", src: "**/*.html", dest: "dist/", flatten: true}],
             },
         },
         focus: {
             dev: {
-                include: ["html", "js"],
+                include: ["css", "html", "js"],
             },
         },
         replace: {
             dev: {
-                src: ["./dist/*.html", "./dist/*.js"],
+                src: ["./dist/**/*.html", "./dist/**/*.js"],
                 replacements: [
                     {
                         from: "%%VERSION_NUMBER%%",
@@ -28,7 +31,7 @@ module.exports = grunt => {
                 overwrite: true
             },
             deploy: {
-                src: ["./dist/*.html", "./dist/*.js"],
+                src: ["./dist/**/*.html", "./dist/**/*.js"],
                 replacements: [
                     {
                         from: "%%VERSION_NUMBER%%",
@@ -39,6 +42,10 @@ module.exports = grunt => {
             },
         },
         watch: {
+            css: {
+                files: ["src/main/**/*.css"],
+                tasks: ["copy:css"],
+            },
             html: {
                 files: ["src/main/**/*.html"],
                 tasks: ["copy:html"],
@@ -88,6 +95,7 @@ module.exports = grunt => {
         // Pre
         "clean",
         // Copy files
+        "copy:css",
         "copy:html",
         // Compile JS
         "webpack:dev",
@@ -98,6 +106,7 @@ module.exports = grunt => {
         // Pre
         "clean",
         // Copy files
+        "copy:css",
         "copy:html",
         // Compile JS
         "webpack:deploy",
diff --git a/package-lock.json b/package-lock.json
index 0c007a4..1021cbb 100644
Binary files a/package-lock.json and b/package-lock.json differ
diff --git a/package.json b/package.json
index e817b95..9e7ac21 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "converter",
-    "version": "1.4.14",
+    "version": "1.5.0",
     "description": "Convert numbers to and from various bases.",
     "author": "Florine W. Dekker",
     "browser": "dist/bundle.js",
diff --git a/src/main/css/main.css b/src/main/css/main.css
new file mode 100644
index 0000000..48fd845
--- /dev/null
+++ b/src/main/css/main.css
@@ -0,0 +1,16 @@
+#inputs {
+    display: flex;
+    flex-wrap: wrap;
+    align-items: start;
+    justify-content: left;
+    /*noinspection CssUnresolvedCustomProperty*/
+    gap: var(--spacing);
+}
+
+#inputs article {
+    margin: 0;
+}
+
+#inputs textarea {
+    display: block;
+}
diff --git a/src/main/index.html b/src/main/index.html
index 8a69665..1530dee 100644
--- a/src/main/index.html
+++ b/src/main/index.html
@@ -8,6 +8,7 @@
     <meta name="description" content="Convert numbers to and from various bases." />
     <meta name="theme-color" content="#0033cc" />
 
+    <meta name="fwd:auto:show-main" />
     <meta name="fwd:nav:target" content="#nav" />
     <meta name="fwd:nav:highlight-path" content="/Tools/Converter/" />
     <meta name="fwd:footer:target" content="#footer" />
@@ -17,6 +18,8 @@
     <title>Converter | FWDekker</title>
 
     <link rel="stylesheet" href="https://static.fwdekker.com/lib/template/3.x.x/template.css?v=%%VERSION_NUMBER%%" />
+    <!--suppress HtmlUnknownTarget -->
+    <link rel="stylesheet" href="main.css?v=%%VERSION_NUMBER%%" />
     <script async src="https://stats.fwdekker.com/count.js"
             data-goatcounter="https://stats.fwdekker.com/count"></script>
 </head>
@@ -31,19 +34,24 @@
     </p>
 </noscript>
 <nav id="nav"></nav>
-<main class="container hidden">
+<main class="hidden">
     <div role="document">
-        <section>
+        <section class="container">
             <header class="fwd-header">
                 <hgroup>
                     <h1><a href=".">Converter</a></h1>
                     <h2>Convert numbers to and from various bases.</h2>
                 </hgroup>
             </header>
-
-            <form id="inputs"></form>
         </section>
-        <footer id="footer"></footer>
+
+        <section class="container-fluid">
+            <form id="inputs" class="grid"></form>
+        </section>
+
+        <section class="container">
+            <footer id="footer"></footer>
+        </section>
     </div>
 </main>
 
diff --git a/src/main/js/main.js b/src/main/js/main.js
index cf07a39..c9d77c0 100644
--- a/src/main/js/main.js
+++ b/src/main/js/main.js
@@ -1,5 +1,5 @@
 // noinspection JSUnresolvedVariable
-const {$, doAfterLoad} = window.fwdekker;
+const {$, doAfterLoad, stringToHtml} = window.fwdekker;
 import bigInt from "big-integer"
 
 
@@ -11,8 +11,9 @@ import bigInt from "big-integer"
  * @param replacement the replacement to insert into the string
  * @returns {string} the input string with one character replaced
  */
-const stringReplaceAt = (str, index, replacement) =>
-    str.substring(0, index) + replacement + str.substring(index + replacement.length);
+function stringReplaceAt(str, index, replacement) {
+    return str.substring(0, index) + replacement + str.substring(index + replacement.length);
+}
 
 /**
  * Replaces all instances of the target with the replacement.
@@ -22,8 +23,9 @@ const stringReplaceAt = (str, index, replacement) =>
  * @param replacement the replacement to insert into the string
  * @returns {string} the input string with all instances of the target replaced
  */
-const stringReplaceAll = (str, target, replacement) =>
-    str.split(target).join(replacement);
+function stringReplaceAll(str, target, replacement) {
+    return str.split(target).join(replacement);
+}
 
 /**
  * Runs `stringReplaceAll` for each character in `targets` and `replacements`.
@@ -34,9 +36,10 @@ const stringReplaceAll = (str, target, replacement) =>
  * in the targets string
  * @returns {string} the input string with all instances of the targets replaced
  */
-const stringReplaceAlls = (str, targets, replacements) =>
-    Array.from(targets).reduce((output, target, index) =>
-        stringReplaceAll(output, target, replacements[index]), str);
+function stringReplaceAlls(str, targets, replacements) {
+    return Array.from(targets)
+        .reduce((output, target, index) => stringReplaceAll(output, target, replacements[index]), str);
+}
 
 
 class NumeralSystem {
@@ -71,26 +74,25 @@ class NumeralSystemInput {
         this.name = name;
         this.numeralSystem = numeralSystem;
 
-        this.label = document.createElement("label");
-        this.label.setAttribute("for", `${this.name}Input`);
-        this.label.innerHTML = this.name;
+        this.label = stringToHtml(`<label for="${this.name}-input">${this.name}</label>`);
 
-        this.textarea = document.createElement("textarea");
-        this.textarea.id = `${this.name}Input`;
-        this.textarea.className = "numberInput";
+        this.textarea = stringToHtml(`<textarea id="${this.name}-input" class="number-input"></textarea>`);
         this.textarea.oninput = () => {
-            if (this.textarea.value === undefined || this.textarea.value === null || this.textarea.value === "")
+            if (this.textarea.value == null || this.textarea.value === "")
                 return;
 
             this.textarea.value = this.numeralSystem.filterBaseString(this.textarea.value);
             updateAllInputs(this, this.numeralSystem.baseToDecimal(this.textarea.value));
         };
+
+        this.wrapper = document.createElement("article");
+        this.wrapper.appendChild(this.label);
+        this.wrapper.appendChild(this.textarea);
     }
 
 
     addToParent(parent) {
-        parent.appendChild(this.label);
-        parent.appendChild(this.textarea);
+        parent.appendChild(this.wrapper);
     }
 
     update(decimalNumber) {
@@ -98,6 +100,7 @@ class NumeralSystemInput {
     }
 }
 
+
 class Base64NumeralSystem extends NumeralSystem {
     // TODO Convert static methods to static properties once supported by Firefox
     static defaultAlphabet() {
@@ -148,20 +151,21 @@ class Base64NumeralSystemInput extends NumeralSystemInput {
     constructor(name) {
         super(name, new Base64NumeralSystem(Base64NumeralSystem.defaultAlphabet()));
 
-        this.dropdown = document.createElement("select");
-        this.dropdown.id = `${this.name}-dropdown`;
+        this.dropdown = stringToHtml(`<select id="${this.name}-dropdown"></select>`);
         this.dropdown.onchange = () => {
             const selectedOption = Base64NumeralSystemInput.dropdownOptions()[this.dropdown.value];
             this.setLastDigits(selectedOption[0], selectedOption[1]);
         };
 
-        this.options =
-            Object.keys(Base64NumeralSystemInput.dropdownOptions()).map(key => {
-                const option = document.createElement("option");
-                option.value = key;
-                option.text = key + ": " + Base64NumeralSystemInput.dropdownOptions()[key].join("");
-                return option;
+        Object
+            .keys(Base64NumeralSystemInput.dropdownOptions())
+            .forEach(key => {
+                const text = key + ": " + Base64NumeralSystemInput.dropdownOptions()[key].join("");
+                const option = stringToHtml(`<option value="${key}">${text}</option>`);
+                this.dropdown.appendChild(option);
             });
+
+        this.wrapper.appendChild(this.dropdown);
     }
 
 
@@ -174,14 +178,6 @@ class Base64NumeralSystemInput extends NumeralSystemInput {
         this.textarea.value =
             stringReplaceAll(stringReplaceAll(this.textarea.value, oc62, c62), oc63, c63);
     }
-
-    addToParent(parent) {
-        this.options.forEach(option => this.dropdown.appendChild(option));
-
-        parent.appendChild(this.label);
-        parent.appendChild(this.dropdown);
-        parent.appendChild(this.textarea);
-    }
 }
 
 
@@ -202,21 +198,18 @@ const inputs = [
     ),
 ];
 
-const updateAllInputs = (source, newValue) => {
+function updateAllInputs(source, newValue) {
     for (const input of inputs)
         if (input !== source)
             input.update(newValue);
-};
+}
 
 
 doAfterLoad(() => {
-    const inputParent = $("#inputs");
-
+    const form = $("#inputs");
     for (const input of inputs)
-        input.addToParent(inputParent);
+        input.addToParent(form);
 
     updateAllInputs(undefined, bigInt(42));
     inputs[0].textarea.focus();
-
-    $("main").classList.remove("hidden");
 });