fix: kickoff time centered without 'Uhr', unified countdown badge, DevPanel close button

- Kickoff: centered "21:00" above flags (no 'Uhr' suffix)
- Countdown: always rendered as badge (was unstyled span for <60min)
- DevPanel: added close button (✕) in panel header for reliable closing

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/DevPanel.module.css

@@ -46,6 +46,23 @@
   padding: 12px 16px;
   background: rgba(254,174,50,0.08);
   border-bottom: 1px solid rgba(254,174,50,0.15);
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.closeBtn {
+  background: none;
+  border: none;
+  color: var(--text-muted);
+  font-size: 16px;
+  cursor: pointer;
+  padding: 4px 8px;
+  border-radius: 6px;
+}
+.closeBtn:hover {
+  background: rgba(255,255,255,0.1);
+  color: var(--text-primary);
 }
 
 .panelTitle {

frontend/src/components/DevPanel.tsx

@@ -131,6 +131,7 @@ export default function DevPanel({ currentUser, onUserChange, matches, onRefresh
         <div className={styles.panel}>
           <div className={styles.panelHeader}>
             <span className={styles.panelTitle}>🧪 Simulations-Modus</span>
+            <button className={styles.closeBtn} onClick={() => setOpen(false)}>✕</button>
           </div>
 
           {/* User Switcher */}

frontend/src/components/MatchCard.module.css

@@ -77,12 +77,17 @@
   border: 1px solid rgba(75,183,248,0.15);
 }
 
-/* Kickoff badge in header row */
-.kickoffBadge {
-  font-size: 12px;
+/* Kickoff time — centered above flags */
+.kickoffRow {
+  text-align: center;
+  margin-bottom: 6px;
+}
+
+.kickoffTime {
+  font-size: 13px;
   font-weight: 700;
   color: var(--text-secondary);
-  letter-spacing: 0.02em;
+  letter-spacing: 0.05em;
 }
 
 .topRowSpacer {

frontend/src/components/MatchCard.tsx

@@ -47,17 +47,7 @@ const STATUS_LABELS: Record<string, string> = {
 function formatKickoff(utcDate: string): string {
   return new Date(utcDate).toLocaleString('de-DE', {
     hour: '2-digit', minute: '2-digit', timeZone: 'Europe/Berlin',
-  }) + ' Uhr';
-}
-
-function CountdownBadge({ minutes }: { minutes: number }) {
-  if (minutes <= 0) return null;
-  if (minutes < 60) return <span className={styles.badgeUrgent}>⚡ in {minutes} Min.</span>;
-  const h = Math.floor(minutes / 60);
-  const m = minutes % 60;
-  if (h < 24) return <span className={styles.badge}>in {h}h{m > 0 ? ` ${m}m` : ''}</span>;
-  const d = Math.floor(h / 24);
-  return <span className={styles.badge}>in {d} Tag{d > 1 ? 'en' : ''}</span>;
+  });
 }
 
 function FlagBox({ crest, name }: { crest: string | null; name: string }) {
@@ -94,7 +84,7 @@ export default function MatchCard({ match, onTip }: Props) {
   return (
     <div className={`card ${styles.card} ${styles[`card_${state}`]} ${isLive ? styles.live : ''} ${glowClass}`}>
 
-      {/* Top row: Group + Kickoff + Countdown */}
+      {/* Top row: Group + Countdown */}
       <div className={styles.topRow}>
         {(isLive || isFinished) && (
           <span className={`${styles.status} ${isLive ? styles.statusLive : ''}`}>
@@ -107,21 +97,29 @@ export default function MatchCard({ match, onTip }: Props) {
             {match.group.replace('GROUP_', 'Gruppe ')}
           </span>
         )}
-        {!isFinished && !isLive && (
-          <span className={styles.kickoffBadge}>{formatKickoff(match.utcDate)}</span>
-        )}
         <span className={styles.topRowSpacer} />
         {(state === 'open' || state === 'tipped') && match.tippable && (
-          match.minutesUntilKickoff < 60 ? (
-            <span className={`${styles.countdown} ${remainingMins < 5 ? styles.countdownUrgent : ''}`}>
-              Noch {remainingMins} Min!
-            </span>
-          ) : (
-            <CountdownBadge minutes={match.minutesUntilKickoff} />
-          )
+          <span className={`${styles.badge} ${remainingMins < 60 ? styles.badgeUrgent : ''} ${remainingMins < 5 ? styles.countdownUrgent : ''}`}>
+            {match.minutesUntilKickoff < 60
+              ? `Noch ${remainingMins} Min!`
+              : (() => {
+                  const h = Math.floor(match.minutesUntilKickoff / 60);
+                  if (h < 24) return `in ${h}h`;
+                  const d = Math.floor(h / 24);
+                  return `in ${d} Tag${d > 1 ? 'en' : ''}`;
+                })()
+            }
+          </span>
         )}
       </div>
 
+      {/* Kickoff time — centered above flags */}
+      {!isFinished && !isLive && (
+        <div className={styles.kickoffRow}>
+          <span className={styles.kickoffTime}>{formatKickoff(match.utcDate)}</span>
+        </div>
+      )}
+
       {/* Teams + Score */}
       <div className={styles.matchRow}>
         {/* Home */}