upcoming tournament page, minor changes

src/components/countdown.tsx

@@ -0,0 +1,57 @@
+import useNow from '@/hooks/use-now';
+import { Text, Group } from '@mantine/core';
+import { useMemo } from 'react';
+
+interface CountdownProps {
+  date: Date;
+  label?: string;
+  color?: string;
+}
+
+interface TimeLeft {
+  days: number;
+  hours: number;
+  minutes: number;
+  seconds: number;
+}
+
+function calculateTimeLeft(targetDate: Date, currentTime = new Date()): TimeLeft {
+  const difference = targetDate.getTime() - currentTime.getTime();
+  
+  if (difference <= 0) {
+    return { days: 0, hours: 0, minutes: 0, seconds: 0 };
+  }
+
+  return {
+    days: Math.floor(difference / (1000 * 60 * 60 * 24)),
+    hours: Math.floor((difference / (1000 * 60 * 60)) % 24),
+    minutes: Math.floor((difference / 1000 / 60) % 60),
+    seconds: Math.floor((difference / 1000) % 60)
+  };
+}
+
+export function Countdown({ date, label, color }: CountdownProps) {
+  const now = useNow();
+  const timeLeft = useMemo(() => calculateTimeLeft(date, now), [date, now]);
+
+  const formatTime = () => {
+    const pad = (num: number) => num.toString().padStart(2, '0');
+    
+    if (timeLeft.days > 0) {
+      return `${timeLeft.days}d ${pad(timeLeft.hours)}:${pad(timeLeft.minutes)}:${pad(timeLeft.seconds)}`;
+    } else {
+      return `${pad(timeLeft.hours)}:${pad(timeLeft.minutes)}:${pad(timeLeft.seconds)}`;
+    }
+  };
+
+  return (
+    <Group gap="xs">
+      {label && <Text size='sm' fw={500}>{label}:</Text>}
+      <Text size='sm' fw={600} c={color} ff="monospace">
+        {formatTime()}
+      </Text>
+    </Group>
+  );
+}
+
+export default Countdown;