diff --git a/biome.json b/biome.json
index 150a2aa..b8b1ddc 100644
--- a/biome.json
+++ b/biome.json
@@ -1,5 +1,10 @@
 {
   "$schema": "https://biomejs.dev/schemas/2.4.16/schema.json",
+  "css": {
+    "parser": {
+      "tailwindDirectives": true
+    }
+  },
   "linter": {
     "enabled": true,
     "rules": {
diff --git a/src/components/AppErrorBoundary.tsx b/src/components/AppErrorBoundary.tsx
index c82a22d..a5ed14e 100644
--- a/src/components/AppErrorBoundary.tsx
+++ b/src/components/AppErrorBoundary.tsx
@@ -1,7 +1,7 @@
 import { ErrorBoundary, type JSX } from "solid-js";
 import { t } from "../lib/i18n";
 import { AppError } from "../types/api";
-import Error from "./Error";
+import ErrorComponent from "./ErrorComponent";
 
 export default function AppErrorBoundaryComponent(props: {
   children: JSX.Element;
@@ -10,7 +10,7 @@ export default function AppErrorBoundaryComponent(props: {
   return (
     <ErrorBoundary
       fallback={(e, reset) => {
-        let text;
+        let text: string;
         let canReset = true;
         if (e instanceof TypeError) {
           text = t("error.networkError");
@@ -26,7 +26,7 @@ export default function AppErrorBoundaryComponent(props: {
         }
 
         return (
-          <Error
+          <ErrorComponent
             text={text}
             fillScreen={true}
             reset={canReset ? reset : undefined}
diff --git a/src/components/AppLayout.tsx b/src/components/AppLayout.tsx
index 973d56a..7497c07 100644
--- a/src/components/AppLayout.tsx
+++ b/src/components/AppLayout.tsx
@@ -107,24 +107,25 @@ function App(props: ParentProps) {
                 <Show when={user()}>
                   {(u) => (
                     <li class="dropdown dropdown-top dropdown-center w-full">
-                      <div
+                      <button
+                        type="button"
                         tabindex="0"
-                        role="button"
                         class="flex flex-row items-center gap-2 max-w-full"
                       >
                         <img
                           src={u()["picture"]}
-                          alt="Picture"
+                          alt={u().name}
                           class="w-6 h-6 rounded"
                         ></img>
-                        <span class="truncate max-w-xs">{u()["name"]}</span>
-                      </div>
+                        <span class="truncate max-w-xs">{u().name}</span>
+                      </button>
                       <ul
                         tabindex="-1"
                         class="dropdown-content menu bg-base-100 rounded-box z-1 w-full p-2 shadow-sm"
                       >
                         <li>
                           <button
+                            type="button"
                             onClick={() =>
                               (window.location.href = `${BASE_URL}/logout`)
                             }
diff --git a/src/components/Error.tsx b/src/components/ErrorComponent.tsx
similarity index 75%
rename from src/components/Error.tsx
rename to src/components/ErrorComponent.tsx
index 539f56d..10d5745 100644
--- a/src/components/Error.tsx
+++ b/src/components/ErrorComponent.tsx
@@ -23,12 +23,20 @@ export default function ErrorComponent({
       <div class="flex flex-row gap-2">
         <Show when={reset}>
           {(reset) => (
-            <button onClick={() => reset()()} class="btn btn-soft mt-4">
+            <button
+              type="button"
+              onClick={() => reset()()}
+              class="btn btn-soft mt-4"
+            >
               {t("panel.tryAgain")}
             </button>
           )}
         </Show>
-        <button onClick={() => navigate(-1)} class="btn btn-soft mt-4">
+        <button
+          type="button"
+          onClick={() => navigate(-1)}
+          class="btn btn-soft mt-4"
+        >
           {t("panel.goBack")}
         </button>
       </div>
diff --git a/src/components/RolePicker.tsx b/src/components/RolePicker.tsx
index 670ffec..41b175f 100644
--- a/src/components/RolePicker.tsx
+++ b/src/components/RolePicker.tsx
@@ -11,8 +11,11 @@ export default function RolePickerComponent({
 }) {
   return (
     <>
-      <label class="label">{t("panel.users.role")}</label>
+      <label for="role" class="label">
+        {t("panel.users.role")}
+      </label>
       <select
+        id="role"
         value={role() ?? ""}
         onChange={(e) => setRole(e.target.value as Role)}
         class="select w-full"
diff --git a/src/components/login/Totp.tsx b/src/components/login/Totp.tsx
index 68f39f0..ef4a246 100644
--- a/src/components/login/Totp.tsx
+++ b/src/components/login/Totp.tsx
@@ -15,7 +15,7 @@ export default function TotpComponent({
   const [fatalError, setFatalError] = createSignal<Error | null>(null);
 
   async function submit() {
-    let redirectUrl;
+    let redirectUrl: string;
     try {
       redirectUrl = await loginApi.totp(code(), rememberMe(), loginChallenge);
     } catch (err) {
@@ -30,7 +30,7 @@ export default function TotpComponent({
       setError(err.message);
       return;
     }
-    window.location.href = redirectUrl!;
+    window.location.href = redirectUrl;
   }
 
   return (
@@ -47,8 +47,11 @@ export default function TotpComponent({
           }}
         >
           <fieldset class="fieldset">
-            <label class="label">{t("totp.code")}</label>
+            <label for="code" class="label">
+              {t("totp.code")}
+            </label>
             <input
+              id="code"
               type="text"
               class="input validator w-full"
               placeholder={t("totp.code")}
diff --git a/src/i18n/en.ts b/src/i18n/en.ts
index 2f7b9fc..92094fe 100644
--- a/src/i18n/en.ts
+++ b/src/i18n/en.ts
@@ -64,6 +64,7 @@ export const dict = {
         glitchtip: "Glitchtip",
         roundcube: "Roundcube",
       },
+      icon: "icon",
     },
     tryAgain: "Try again",
     goBack: "Go back",
diff --git a/src/lib/consent.ts b/src/lib/consent.ts
index c32d338..d64b4a2 100644
--- a/src/lib/consent.ts
+++ b/src/lib/consent.ts
@@ -28,8 +28,8 @@ export const consentApi = {
       method: "POST",
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
-        consent: consent,
-        consentChallenge: consentChallenge,
+        consent,
+        consentChallenge,
       }),
     });
 
diff --git a/src/lib/invite.ts b/src/lib/invite.ts
index 45a6eda..dccff57 100644
--- a/src/lib/invite.ts
+++ b/src/lib/invite.ts
@@ -38,12 +38,12 @@ export const inviteApi = {
     return await response.json();
   },
 
-  create: async (userData: CreateInviteData): Promise<InviteData> => {
+  create: async (inviteData: CreateInviteData): Promise<InviteData> => {
     const response = await fetch(`${BASE_URL}/invite`, {
       method: "POST",
       credentials: "include",
       headers: { "Content-Type": "application/json" },
-      body: JSON.stringify(userData),
+      body: JSON.stringify(inviteData),
     });
 
     if (!response.ok) {
diff --git a/src/lib/login.ts b/src/lib/login.ts
index 63c59fe..ededf07 100644
--- a/src/lib/login.ts
+++ b/src/lib/login.ts
@@ -29,7 +29,7 @@ export const loginApi = {
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
         ...credentials,
-        loginChallenge: loginChallenge,
+        loginChallenge,
       }),
     });
 
@@ -44,7 +44,7 @@ export const loginApi = {
     const response = await fetch(`${BASE_URL}/login/minecraftcheck`, {
       method: "POST",
       headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ loginChallenge: loginChallenge }),
+      body: JSON.stringify({ loginChallenge }),
     });
 
     if (!response.ok)
@@ -67,9 +67,9 @@ export const loginApi = {
       method: "POST",
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
-        code: code,
-        rememberMe: rememberMe,
-        loginChallenge: loginChallenge,
+        code,
+        rememberMe,
+        loginChallenge,
       }),
     });
 
diff --git a/src/lib/setup.ts b/src/lib/setup.ts
index 9ed6d5d..8e1f727 100644
--- a/src/lib/setup.ts
+++ b/src/lib/setup.ts
@@ -28,7 +28,7 @@ export const setupApi = {
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
         ...details,
-        token: token,
+        token,
       }),
     });
 
@@ -43,7 +43,7 @@ export const setupApi = {
     const response = await fetch(`${BASE_URL}/setup/minecraftcheck`, {
       method: "POST",
       headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ token: token }),
+      body: JSON.stringify({ token }),
     });
 
     if (!response.ok)
@@ -58,7 +58,7 @@ export const setupApi = {
     const response = await fetch(`${BASE_URL}/setup/totpsetup`, {
       method: "POST",
       headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ token: token }),
+      body: JSON.stringify({ token }),
     });
 
     if (!response.ok)
@@ -73,7 +73,7 @@ export const setupApi = {
     const response = await fetch(`${BASE_URL}/setup/totpverify`, {
       method: "POST",
       headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ code: code, token: token }),
+      body: JSON.stringify({ code, token }),
     });
 
     if (!response.ok)
diff --git a/src/pages/consent.tsx b/src/pages/consent.tsx
index f3bb624..0d87923 100644
--- a/src/pages/consent.tsx
+++ b/src/pages/consent.tsx
@@ -26,7 +26,7 @@ export default function ConsentPage() {
 
   async function consent(consent: boolean, consentChallenge: string) {
     const redirectUrl = await consentApi.consent(consent, consentChallenge);
-    window.location.href = redirectUrl!;
+    window.location.href = redirectUrl;
   }
 
   return (
@@ -37,7 +37,7 @@ export default function ConsentPage() {
         <div class="flex min-h-screen items-center justify-center">
           <div class="card bg-base-200 border-2 border-base-300 w-full max-w-md shrink-0 shadow-2xl">
             <div class="card-body">
-              <img src="/logo.webp"></img>
+              <img src="/logo.webp" alt="TrueOG"></img>
               <div class="flex flex-col items-center gap-4">
                 <h1 class="text-2xl font-bold">{t("consent.title")}</h1>
 
@@ -50,15 +50,15 @@ export default function ConsentPage() {
                   <For each={consentData()?.scopes}>
                     {(scope) => (
                       <li>
-                        {scopeMap.has(scope)
-                          ? scopeMap.get(scope)!()
-                          : t("consent.scopes.default", { scope: scope })}
+                        {scopeMap.get(scope)?.() ??
+                          t("consent.scopes.default", { scope })}
                       </li>
                     )}
                   </For>
                 </ul>
                 <div class="w-full py-2 flex flex-col gap-2">
                   <button
+                    type="button"
                     onClick={() =>
                       consent(true, params.consent_challenge as string)
                     }
@@ -67,6 +67,7 @@ export default function ConsentPage() {
                     {t("consent.allow")}
                   </button>
                   <button
+                    type="button"
                     onClick={() =>
                       consent(false, params.consent_challenge as string)
                     }
diff --git a/src/pages/home.tsx b/src/pages/home.tsx
index aaf46f8..1a14482 100644
--- a/src/pages/home.tsx
+++ b/src/pages/home.tsx
@@ -57,7 +57,11 @@ export default function HomePage() {
             <a href={app.link} target="_blank" rel="noopener noreferrer">
               <div class="card bg-base-200 hover:bg-base-300 transition-colors border-2 border-base-300 shadow-2xl">
                 <div class="card-body flex items-center justify-center">
-                  <img class="w-44 h-44" src={app.icon}></img>
+                  <img
+                    class="w-44 h-44"
+                    src={app.icon}
+                    alt={`${app.name} ${t("panel.home.icon")}`}
+                  ></img>
                   <h2 class="card-title">{app.name}</h2>
                 </div>
               </div>
diff --git a/src/pages/invites.tsx b/src/pages/invites.tsx
index 26c58e9..258758d 100644
--- a/src/pages/invites.tsx
+++ b/src/pages/invites.tsx
@@ -30,6 +30,7 @@ function InviteRow({ invite }: { invite: InviteData }) {
             }
           >
             <button
+              type="button"
               class="btn btn-ghost"
               onClick={() => {
                 navigator.clipboard.writeText(link);
@@ -56,6 +57,7 @@ function InviteRow({ invite }: { invite: InviteData }) {
       </td>
       <th>
         <button
+          type="button"
           onClick={async () => {
             setDeleting(true);
             await inviteApi.delete(invite.id.toString());
@@ -101,7 +103,7 @@ export default function InvitesPage() {
   const [userId, setUserId] = createSignal<string>();
   const [fatalError, setFatalError] = createSignal<Error | null>(null);
 
-  let modalRef: HTMLDialogElement;
+  let modalRef!: HTMLDialogElement;
 
   async function create() {
     setError(null);
@@ -109,9 +111,9 @@ export default function InvitesPage() {
     setUpdating(true);
     try {
       await inviteApi.create({
-        invitedUserId: userId()!,
+        invitedUserId: userId() as string,
       });
-      modalRef!.close();
+      modalRef.close();
       revalidate("invites");
     } catch (err) {
       if (!(err instanceof AppError)) {
@@ -134,7 +136,11 @@ export default function InvitesPage() {
       <section class="p-8">
         <div class="flex justify-between">
           <h1 class="text-2xl font-bold mb-4">{t("panel.invites.title")}</h1>
-          <button onClick={() => modalRef!.showModal()} class="btn btn-soft">
+          <button
+            type="button"
+            onClick={() => modalRef.showModal()}
+            class="btn btn-soft"
+          >
             <FiPlus class="text-lg" />
             {t("panel.invites.createNew")}
           </button>
@@ -157,18 +163,21 @@ export default function InvitesPage() {
 
       <dialog
         onTransitionEnd={(e) => {
-          if (e.propertyName === "opacity" && !modalRef!.open) {
+          if (e.propertyName === "opacity" && !modalRef.open) {
             setUserId(undefined);
             setError(null);
           }
         }}
-        ref={modalRef!}
+        ref={modalRef}
         id="create_invite_modal"
         class="modal"
       >
         <div class="modal-box">
           <form method="dialog">
-            <button class="btn btn-sm btn-circle btn-ghost absolute right-2 top-2">
+            <button
+              type="button"
+              class="btn btn-sm btn-circle btn-ghost absolute right-2 top-2"
+            >
               <FiX class="text-lg" />
             </button>
           </form>
@@ -181,8 +190,11 @@ export default function InvitesPage() {
             }}
           >
             <fieldset class="fieldset">
-              <label class="label">{t("panel.invites.user")}</label>
+              <label for="user" class="label">
+                {t("panel.invites.user")}
+              </label>
               <select
+                id="user"
                 value={userId() ?? ""}
                 onChange={(e) => setUserId(e.target.value as string)}
                 class="select w-full"
@@ -207,7 +219,7 @@ export default function InvitesPage() {
           </form>
         </div>
         <form method="dialog" class="modal-backdrop">
-          <button>Close</button>
+          <button type="button">Close</button>
         </form>
       </dialog>
     </>
diff --git a/src/pages/login.tsx b/src/pages/login.tsx
index 8effd43..f7ad948 100644
--- a/src/pages/login.tsx
+++ b/src/pages/login.tsx
@@ -23,14 +23,14 @@ export default function LoginPage() {
     const data = loginData();
     if (!data) return;
     if (data.skip) {
-      window.location.href = data.redirectUri!;
+      window.location.href = data.redirectUri as string;
     }
   });
 
   const stage = createMemo(() => {
     const data = loginData();
     if (!data || data.skip) return;
-    const stage = getStage(data.currentStage!);
+    const stage = getStage(data.currentStage as string);
     if (stage instanceof AppError) throw stage;
     return stage;
   });
diff --git a/src/pages/user/user.tsx b/src/pages/user/user.tsx
index 6db7d46..408509e 100644
--- a/src/pages/user/user.tsx
+++ b/src/pages/user/user.tsx
@@ -145,7 +145,11 @@ function User() {
 
       <div class="flex flex-col w-full xl:w-1/2">
         <div class="flex flex-row items-center mb-4">
-          <button onClick={() => navigate(-1)} class="btn btn-ghost mr-2">
+          <button
+            type="button"
+            onClick={() => navigate(-1)}
+            class="btn btn-ghost mr-2"
+          >
             <FiChevronLeft class="text-2xl" />
           </button>
           <img
@@ -163,8 +167,11 @@ function User() {
           }}
         >
           <fieldset class="fieldset">
-            <label class="label">{t("panel.users.email")}</label>
+            <label for="email" class="label">
+              {t("panel.users.email")}
+            </label>
             <input
+              id="email"
               type="text"
               class="input w-full"
               placeholder={t("panel.users.email")}
@@ -173,8 +180,11 @@ function User() {
               required
             />
 
-            <label class="label">{t("panel.users.minecraftUuid")}</label>
+            <label for="minecraftUuid" class="label">
+              {t("panel.users.minecraftUuid")}
+            </label>
             <input
+              id="minecraftUuid"
               type="text"
               class="input validator w-full"
               placeholder={t("panel.users.minecraftUuid")}
@@ -199,8 +209,11 @@ function User() {
               <RolePicker role={role} setRole={setRole} />
             </div>
 
-            <label class="label">{t("panel.users.setUp")}</label>
+            <label for="setUp" class="label">
+              {t("panel.users.setUp")}
+            </label>
             <input
+              id="setUp"
               type="text"
               class="input w-full"
               placeholder={t("panel.users.setUp")}
@@ -232,6 +245,7 @@ function User() {
                 }
               >
                 <button
+                  type="button"
                   onClick={() => {
                     const deactivated = user()?.deactivated;
                     if (deactivated === undefined) return;
@@ -257,6 +271,7 @@ function User() {
                 }
               >
                 <button
+                  type="button"
                   onClick={deleteUser}
                   class="btn btn-error w-full"
                   disabled={
diff --git a/src/pages/user/users.tsx b/src/pages/user/users.tsx
index f497040..0eebe66 100644
--- a/src/pages/user/users.tsx
+++ b/src/pages/user/users.tsx
@@ -72,7 +72,7 @@ export default function UsersPage() {
   const [role, setRole] = createSignal<Role>();
   const [fatalError, setFatalError] = createSignal<Error | null>(null);
 
-  let modalRef: HTMLDialogElement;
+  let modalRef!: HTMLDialogElement;
 
   async function create() {
     setError(null);
@@ -81,10 +81,10 @@ export default function UsersPage() {
     try {
       await userApi.create({
         email: email(),
-        role: role()!,
-        minecraftUuid: minecraftUuid()!,
+        role: role() as Role,
+        minecraftUuid: minecraftUuid(),
       });
-      modalRef!.close();
+      modalRef.close();
       revalidate("users");
     } catch (err) {
       if (!(err instanceof AppError)) {
@@ -109,7 +109,11 @@ export default function UsersPage() {
       <section class="p-8">
         <div class="flex justify-between">
           <h1 class="text-2xl font-bold mb-4">{t("panel.users.title")}</h1>
-          <button onClick={() => modalRef!.showModal()} class="btn btn-soft">
+          <button
+            type="button"
+            onClick={() => modalRef.showModal()}
+            class="btn btn-soft"
+          >
             <FiPlus class="text-lg" />
             {t("panel.users.createNew")}
           </button>
@@ -130,20 +134,23 @@ export default function UsersPage() {
 
       <dialog
         onTransitionEnd={(e) => {
-          if (e.propertyName === "opacity" && !modalRef!.open) {
+          if (e.propertyName === "opacity" && !modalRef.open) {
             setEmail("");
             setMinecraftUuid("");
             setRole();
             setError(null);
           }
         }}
-        ref={modalRef!}
+        ref={modalRef}
         id="create_user_modal"
         class="modal"
       >
         <div class="modal-box">
           <form method="dialog">
-            <button class="btn btn-sm btn-circle btn-ghost absolute right-2 top-2">
+            <button
+              type="button"
+              class="btn btn-sm btn-circle btn-ghost absolute right-2 top-2"
+            >
               <FiX class="text-lg" />
             </button>
           </form>
@@ -156,8 +163,11 @@ export default function UsersPage() {
             }}
           >
             <fieldset class="fieldset">
-              <label class="label">{t("panel.users.email")}</label>
+              <label for="email" class="label">
+                {t("panel.users.email")}
+              </label>
               <input
+                id="email"
                 type="text"
                 class="input w-full"
                 placeholder={t("panel.users.email")}
@@ -166,8 +176,11 @@ export default function UsersPage() {
                 required
               />
 
-              <label class="label">{t("panel.users.minecraftUuid")}</label>
+              <label for="minecraftUuid" class="label">
+                {t("panel.users.minecraftUuid")}
+              </label>
               <input
+                id="minecraftUuid"
                 type="text"
                 class="input validator w-full"
                 placeholder={t("panel.users.minecraftUuid")}
@@ -196,7 +209,7 @@ export default function UsersPage() {
           </form>
         </div>
         <form method="dialog" class="modal-backdrop">
-          <button>Close</button>
+          <button type="button">Close</button>
         </form>
       </dialog>
     </>