style: Spielplan — glassmorphism stats card, timeline date headers

- Stats: glass card with 2/104 progress + Punkte/Exakt/Offen details
- Date sections: timeline divider with centered label + lines
  instead of accordion (no more broken border-radius)
- Past matches: simple toggle button, separate from timeline
- Match list: clean vertical flow without section containers

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

frontend/src/pages/MatchesPage.module.css

@@ -1,84 +1,148 @@
 .page { display: flex; flex-direction: column; gap: 16px; }
 
-/* Compact stats line */
-.statsLine {
+/* ── Stats Card (glassmorphism) ── */
+.statsCard {
+  padding: 18px 20px;
   display: flex;
   align-items: center;
-  justify-content: space-between;
-  padding: 10px 16px;
-  background: var(--surface-mid);
-  border-radius: var(--radius-sm);
-  border: 1px solid var(--border-subtle);
+  gap: 16px;
 }
 
-.statsText {
-  font-size: 13px;
-  color: var(--text-secondary);
+.statsMain {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 2px;
 }
 
-.statsText strong {
-  color: var(--text-primary);
+.statsProgress {
+  display: flex;
+  align-items: baseline;
+  gap: 2px;
 }
 
-.statsReminder {
-  font-size: 12px;
-  color: var(--gold);
+.statsNum {
+  font-size: 28px;
+  font-weight: 800;
+  color: var(--primary);
+  line-height: 1;
+}
+
+.statsSlash {
+  font-size: 18px;
+  color: var(--text-muted);
+  font-weight: 300;
+  margin: 0 1px;
+}
+
+.statsTotal {
+  font-size: 16px;
   font-weight: 600;
+  color: var(--text-secondary);
+  line-height: 1;
 }
 
-/* Sections */
-.section {
-  border-radius: var(--radius-md);
-  overflow: hidden;
+.statsLabel {
+  font-size: 11px;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
 }
 
-.sectionHighlight {
-  border-left: 3px solid var(--gold);
+.statsDivider {
+  width: 1px;
+  height: 40px;
+  background: var(--border-subtle);
+  flex-shrink: 0;
 }
 
-.sectionHeader {
+.statsDetails {
+  display: flex;
+  gap: 16px;
+  flex: 1;
+  justify-content: space-around;
+}
+
+.statsDetail {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 2px;
+}
+
+.statsDetailValue {
+  font-size: 18px;
+  font-weight: 700;
+  color: var(--text-primary);
+  line-height: 1;
+}
+
+.statsDetailLabel {
+  font-size: 10px;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+/* ── Date Headers (timeline dividers) ── */
+.dateHeader {
   display: flex;
   align-items: center;
-  width: 100%;
-  padding: 14px 16px;
-  background: var(--surface-mid);
-  border: none;
-  border-bottom: 1px solid var(--border-subtle);
-  color: var(--text-primary);
-  cursor: pointer;
-  font-size: 0.95rem;
-  gap: 8px;
-  transition: background 0.15s;
-}
-.sectionHeader:hover {
-  background: var(--surface-high);
+  gap: 12px;
+  padding: 4px 0;
 }
 
-.sectionLabel {
-  font-weight: 700;
+.dateLine {
   flex: 1;
-  text-align: left;
+  height: 1px;
+  background: var(--border-subtle);
 }
 
-.sectionCount {
-  font-size: 0.8rem;
-  color: var(--text-muted);
+.dateLabel {
+  font-size: 14px;
+  font-weight: 700;
+  color: var(--text-primary);
+  white-space: nowrap;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.dateCount {
+  font-size: 11px;
   font-weight: 500;
-}
-
-.sectionChevron {
-  font-size: 0.85rem;
   color: var(--text-muted);
 }
 
-.sectionContent {
+/* ── Match List ── */
+.matchList {
   display: flex;
   flex-direction: column;
   gap: 10px;
-  padding: 10px 0;
+  margin-bottom: 8px;
 }
 
-/* States */
+/* ── Past matches toggle ── */
+.pastToggle {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  width: 100%;
+  padding: 12px 16px;
+  background: var(--surface-low);
+  border: 1px solid var(--border-subtle);
+  border-radius: var(--radius-sm);
+  color: var(--text-secondary);
+  cursor: pointer;
+  font-size: 13px;
+  font-weight: 600;
+  transition: background 0.15s;
+}
+.pastToggle:hover {
+  background: var(--surface-mid);
+}
+
+/* ── States ── */
 .loadingState, .errorState, .emptyState {
   display: flex;
   flex-direction: column;