Implement responsive design, browser compatibility, pagination controls, challenge validation, and auto-rotation

app/globals.css

@@ -45,6 +45,40 @@
 
 :root {
   --radius: 0.625rem;
+  /* Fallback colors for older browsers (hex/rgb) */
+  --background: #ffffff;
+  --foreground: #0a0a0a;
+  --card: #ffffff;
+  --card-foreground: #0a0a0a;
+  --popover: #ffffff;
+  --popover-foreground: #0a0a0a;
+  --primary: #171717;
+  --primary-foreground: #fafafa;
+  --secondary: #f5f5f5;
+  --secondary-foreground: #171717;
+  --muted: #f5f5f5;
+  --muted-foreground: #737373;
+  --accent: #f5f5f5;
+  --accent-foreground: #171717;
+  --destructive: #ef4444;
+  --border: #e5e5e5;
+  --input: #e5e5e5;
+  --ring: #a3a3a3;
+  --chart-1: #f97316;
+  --chart-2: #06b6d4;
+  --chart-3: #3b82f6;
+  --chart-4: #f59e0b;
+  --chart-5: #84cc16;
+  --sidebar: #fafafa;
+  --sidebar-foreground: #0a0a0a;
+  --sidebar-primary: #171717;
+  --sidebar-primary-foreground: #fafafa;
+  --sidebar-accent: #f5f5f5;
+  --sidebar-accent-foreground: #171717;
+  --sidebar-border: #e5e5e5;
+  --sidebar-ring: #a3a3a3;
+
+  /* Modern oklch colors for browsers that support it */
   --background: oklch(1 0 0);
   --foreground: oklch(0.145 0 0);
   --card: oklch(1 0 0);
@@ -79,6 +113,40 @@
 }
 
 .dark {
+  /* Fallback colors for older browsers (hex/rgb) */
+  --background: #0a0a0a;
+  --foreground: #fafafa;
+  --card: #171717;
+  --card-foreground: #fafafa;
+  --popover: #171717;
+  --popover-foreground: #fafafa;
+  --primary: #e5e5e5;
+  --primary-foreground: #171717;
+  --secondary: #262626;
+  --secondary-foreground: #fafafa;
+  --muted: #262626;
+  --muted-foreground: #a3a3a3;
+  --accent: #262626;
+  --accent-foreground: #fafafa;
+  --destructive: #f87171;
+  --border: rgba(255, 255, 255, 0.1);
+  --input: rgba(255, 255, 255, 0.15);
+  --ring: #737373;
+  --chart-1: #8b5cf6;
+  --chart-2: #10b981;
+  --chart-3: #84cc16;
+  --chart-4: #a855f7;
+  --chart-5: #fb923c;
+  --sidebar: #171717;
+  --sidebar-foreground: #fafafa;
+  --sidebar-primary: #8b5cf6;
+  --sidebar-primary-foreground: #fafafa;
+  --sidebar-accent: #262626;
+  --sidebar-accent-foreground: #fafafa;
+  --sidebar-border: rgba(255, 255, 255, 0.1);
+  --sidebar-ring: #737373;
+
+  /* Modern oklch colors for browsers that support it */
   --background: oklch(0.145 0 0);
   --foreground: oklch(0.985 0 0);
   --card: oklch(0.205 0 0);

components/page/recent-submissions.tsx

@@ -186,6 +186,13 @@ export function RecentSubmissions({
         {submissions.length > 0 ? (
           <div className="space-y-3 max-h-96 overflow-y-auto">
             {[...submissions]
+              // Filter out invalid submissions with null/missing challenge data
+              .filter((submission) => 
+                submission.challenge && 
+                submission.challenge.id && 
+                submission.challenge.name &&
+                submission.challenge.name !== 'challenge_null'
+              )
               // Sort submissions by date (most recent first)
               .sort((a, b) => new Date(b.date).getTime() - new Date(a.date).getTime())
               .map((submission) => (

components/ui/select.tsx

@@ -0,0 +1,160 @@
+"use client"
+
+import * as React from "react"
+import * as SelectPrimitive from "@radix-ui/react-select"
+import { Check, ChevronDown, ChevronUp } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Select = SelectPrimitive.Root
+
+const SelectGroup = SelectPrimitive.Group
+
+const SelectValue = SelectPrimitive.Value
+
+const SelectTrigger = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Trigger
+    ref={ref}
+    className={cn(
+      "flex h-10 w-full items-center justify-between rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <SelectPrimitive.Icon asChild>
+      <ChevronDown className="h-4 w-4 opacity-50" />
+    </SelectPrimitive.Icon>
+  </SelectPrimitive.Trigger>
+))
+SelectTrigger.displayName = SelectPrimitive.Trigger.displayName
+
+const SelectScrollUpButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollUpButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollUpButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollUpButton
+    ref={ref}
+    className={cn(
+      "flex cursor-default items-center justify-center py-1",
+      className
+    )}
+    {...props}
+  >
+    <ChevronUp className="h-4 w-4" />
+  </SelectPrimitive.ScrollUpButton>
+))
+SelectScrollUpButton.displayName = SelectPrimitive.ScrollUpButton.displayName
+
+const SelectScrollDownButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollDownButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollDownButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollDownButton
+    ref={ref}
+    className={cn(
+      "flex cursor-default items-center justify-center py-1",
+      className
+    )}
+    {...props}
+  >
+    <ChevronDown className="h-4 w-4" />
+  </SelectPrimitive.ScrollDownButton>
+))
+SelectScrollDownButton.displayName =
+  SelectPrimitive.ScrollDownButton.displayName
+
+const SelectContent = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Content>
+>(({ className, children, position = "popper", ...props }, ref) => (
+  <SelectPrimitive.Portal>
+    <SelectPrimitive.Content
+      ref={ref}
+      className={cn(
+        "relative z-50 max-h-96 min-w-[8rem] overflow-hidden rounded-md border bg-popover text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+        position === "popper" &&
+          "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
+        className
+      )}
+      position={position}
+      {...props}
+    >
+      <SelectScrollUpButton />
+      <SelectPrimitive.Viewport
+        className={cn(
+          "p-1",
+          position === "popper" &&
+            "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)]"
+        )}
+      >
+        {children}
+      </SelectPrimitive.Viewport>
+      <SelectScrollDownButton />
+    </SelectPrimitive.Content>
+  </SelectPrimitive.Portal>
+))
+SelectContent.displayName = SelectPrimitive.Content.displayName
+
+const SelectLabel = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Label>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Label
+    ref={ref}
+    className={cn("py-1.5 pl-8 pr-2 text-sm font-semibold", className)}
+    {...props}
+  />
+))
+SelectLabel.displayName = SelectPrimitive.Label.displayName
+
+const SelectItem = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Item>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex w-full cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <SelectPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </SelectPrimitive.ItemIndicator>
+    </span>
+
+    <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
+  </SelectPrimitive.Item>
+))
+SelectItem.displayName = SelectPrimitive.Item.displayName
+
+const SelectSeparator = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-muted", className)}
+    {...props}
+  />
+))
+SelectSeparator.displayName = SelectPrimitive.Separator.displayName
+
+export {
+  Select,
+  SelectGroup,
+  SelectValue,
+  SelectTrigger,
+  SelectContent,
+  SelectLabel,
+  SelectItem,
+  SelectSeparator,
+  SelectScrollUpButton,
+  SelectScrollDownButton,
+}

hooks/useAppSounds.ts

@@ -1,9 +1,15 @@
 import { AppSounds } from '@/types/sounds';
 import { useEffect, useState } from 'react';
 
-const SUCCESS_SOUND = '/sounds/success.mp3';
-const ERROR_SOUND = '/sounds/error.mp3';
-const FIRST_BLOOD_SOUND = '/sounds/firstblood.mp3';
+// Use basePath-aware paths for GitHub Pages deployment
+const getAssetPath = (path: string) => {
+  const basePath = process.env.NODE_ENV === 'production' ? '/ctf-scoreboard' : '';
+  return `${basePath}${path}`;
+};
+
+const SUCCESS_SOUND = getAssetPath('/sounds/success.mp3');
+const ERROR_SOUND = getAssetPath('/sounds/error.mp3');
+const FIRST_BLOOD_SOUND = getAssetPath('/sounds/firstblood.mp3');
 
 export function useAppSounds(): AppSounds {
   const [isClient, setIsClient] = useState(false);