diff --git a/.gitignore b/.gitignore
index fd89724..922d93e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ node_modules
 .env
 .env.local
 *.log
+testdata
\ No newline at end of file
diff --git a/app/components/Bracket.tsx b/app/[locale]/components/Bracket.tsx
similarity index 100%
rename from app/components/Bracket.tsx
rename to app/[locale]/components/Bracket.tsx
diff --git a/app/components/Fixtures.tsx b/app/[locale]/components/Fixtures.tsx
similarity index 100%
rename from app/components/Fixtures.tsx
rename to app/[locale]/components/Fixtures.tsx
diff --git a/app/components/Flag.tsx b/app/[locale]/components/Flag.tsx
similarity index 100%
rename from app/components/Flag.tsx
rename to app/[locale]/components/Flag.tsx
diff --git a/app/components/Groups.tsx b/app/[locale]/components/Groups.tsx
similarity index 100%
rename from app/components/Groups.tsx
rename to app/[locale]/components/Groups.tsx
diff --git a/app/components/KoFixtures.tsx b/app/[locale]/components/KoFixtures.tsx
similarity index 100%
rename from app/components/KoFixtures.tsx
rename to app/[locale]/components/KoFixtures.tsx
diff --git a/app/components/Simulation.tsx b/app/[locale]/components/Simulation.tsx
similarity index 100%
rename from app/components/Simulation.tsx
rename to app/[locale]/components/Simulation.tsx
diff --git a/app/components/ThirdPlace.tsx b/app/[locale]/components/ThirdPlace.tsx
similarity index 100%
rename from app/components/ThirdPlace.tsx
rename to app/[locale]/components/ThirdPlace.tsx
diff --git a/app/[locale]/favicon.ico b/app/[locale]/favicon.ico
new file mode 100644
index 0000000..220e24c
Binary files /dev/null and b/app/[locale]/favicon.ico differ
diff --git a/app/[locale]/globals.css b/app/[locale]/globals.css
new file mode 100644
index 0000000..b33b2a5
--- /dev/null
+++ b/app/[locale]/globals.css
@@ -0,0 +1,501 @@
+:root {
+  /* Palette: Stadion bei Nacht über drei Zeitzonen.
+     Tiefes Mitternachtsblau, kühles Flutlicht-Weiß, warmer Rasen-Akzent,
+     ein Signal-Magenta für "live". Bewusst nicht die üblichen AI-Defaults. */
+  --bg: #0b1020;
+  --bg-raised: #121a32;
+  --bg-card: #16203c;
+  --line: #243152;
+  --line-soft: #1b2540;
+  --ink: #eef2fb;
+  --ink-dim: #9aa6c4;
+  --ink-faint: #5f6d92;
+  --turf: #4ade80;        /* Rasen / qualifiziert */
+  --turf-deep: #1f7a45;
+  --floodlight: #cfe0ff;
+  --live: #ff3d7f;        /* Live-Signal */
+  --gold: #ffd24a;        /* Sieger / Finale */
+  --radius: 10px;
+  --radius-sm: 6px;
+  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
+
+  --font-display: "Archivo Expanded", "Archivo", system-ui, sans-serif;
+  --font-body: "Inter", system-ui, -apple-system, sans-serif;
+  --font-mono: "Geist Mono", "SFMono-Regular", ui-monospace, monospace;
+}
+
+* { box-sizing: border-box; margin: 0; padding: 0; }
+
+html { scroll-behavior: smooth; }
+@media (prefers-reduced-motion: reduce) {
+  html { scroll-behavior: auto; }
+  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
+}
+
+body {
+  background:
+    radial-gradient(1200px 600px at 70% -10%, #16224a 0%, transparent 55%),
+    radial-gradient(900px 500px at 10% 0%, #102046 0%, transparent 50%),
+    var(--bg);
+  color: var(--ink);
+  font-family: var(--font-body);
+  font-size: 15px;
+  line-height: 1.5;
+  -webkit-font-smoothing: antialiased;
+  min-height: 100vh;
+}
+
+a { color: inherit; text-decoration: none; }
+
+.wrap { max-width: 1240px; margin: 0 auto; padding: 0 20px 0 0; }
+
+/* ---------- Header / Hero ---------- */
+.masthead {
+  border-bottom: 1px solid var(--line);
+  background: linear-gradient(180deg, rgba(18,26,50,0.7), transparent);
+  position: sticky; top: 0; z-index: 50;
+  backdrop-filter: blur(10px);
+}
+.masthead-inner {
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 14px 0; gap: 16px; flex-wrap: wrap;
+}
+.brand { display: flex; align-items: baseline; gap: 12px; }
+.brand-mark {
+  font-family: var(--font-display);
+  font-weight: 800; letter-spacing: -0.02em;
+  font-size: clamp(20px, 3vw, 28px);
+  text-transform: uppercase;
+}
+.brand-mark .accent { color: var(--turf); }
+.brand-sub {
+  font-family: var(--font-mono); font-size: 11px;
+  color: var(--ink-faint); letter-spacing: 0.08em; text-transform: uppercase;
+}
+
+.status-pill {
+  display: inline-flex; align-items: center; gap: 8px;
+  font-family: var(--font-mono); font-size: 12px;
+  color: var(--ink-dim);
+  border: 1px solid var(--line); border-radius: 999px;
+  padding: 6px 12px; background: var(--bg-card);
+}
+.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ink-faint); }
+.dot.on { background: var(--turf); box-shadow: 0 0 0 3px rgba(74,222,128,0.18); }
+.dot.live { background: var(--live); box-shadow: 0 0 0 3px rgba(255,61,127,0.2); animation: pulse 1.6s infinite; }
+@keyframes pulse { 50% { box-shadow: 0 0 0 6px rgba(255,61,127,0); } }
+
+/* ---------- Tabs ---------- */
+.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 0 0 4px; }
+.masthead-tabs { width: 100%; border-bottom: none; margin: 0; }
+.tab {
+  font-family: var(--font-display); font-weight: 700;
+  text-transform: uppercase; letter-spacing: 0.01em;
+  font-size: 14px; color: var(--ink-faint);
+  padding: 16px 18px; cursor: pointer; border: none; background: none;
+  border-bottom: 2px solid transparent; transition: color .15s, border-color .15s;
+}
+.tab:hover { color: var(--ink-dim); }
+.tab.active { color: var(--ink); border-bottom-color: var(--turf); }
+
+.section { padding: 28px 0 64px; }
+
+/* ---------- Gruppen ---------- */
+.group-grid {
+  display: grid; gap: 16px;
+  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
+}
+.group-card {
+  background: var(--bg-card); border: 1px solid var(--line);
+  border-radius: var(--radius); overflow: hidden;
+}
+.group-head {
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 12px 14px; border-bottom: 1px solid var(--line-soft);
+  background: var(--bg-raised);
+}
+.group-name {
+  font-family: var(--font-display); font-weight: 800; font-size: 16px;
+  text-transform: uppercase; letter-spacing: 0.02em;
+}
+.group-name.group-complete { color: var(--turf); }
+.group-tag { font-family: var(--font-mono); font-size: 10px; color: var(--ink-faint); }
+
+table.standings { width: 100%; border-collapse: collapse; }
+.standings th {
+  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
+  text-transform: uppercase; letter-spacing: 0.06em;
+  color: var(--ink-faint); text-align: right; padding: 8px 6px;
+}
+.standings th.team { text-align: left; padding-left: 14px; }
+.standings td {
+  padding: 9px 6px; text-align: right; font-variant-numeric: tabular-nums;
+  border-top: 1px solid var(--line-soft); font-size: 13px;
+}
+.standings td.team {
+  text-align: left; padding-left: 14px; display: flex; align-items: center; gap: 9px;
+}
+.rankdot {
+  width: 18px; height: 18px; border-radius: 5px; flex: none;
+  display: grid; place-items: center;
+  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
+  color: var(--bg); background: var(--ink-faint);
+}
+.rankdot.q1, .rankdot.q2 { background: var(--turf); }
+.rankdot.q3 { background: var(--gold); color: #2a2200; }
+.rankdot.q3.out { background: var(--ink-faint); color: var(--bg); }
+.team-name { font-weight: 600; }
+.team-code { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); }
+.pts { font-weight: 700; color: var(--floodlight); }
+
+/* Live-Zeile */
+.score-live { color: var(--live); font-weight: 700; }
+
+/* Gruppen-Tab: grüne Hervorhebung für Teams mit laufendem Spiel */
+.group-grid .row-live { background: rgba(74, 222, 128, 0.08); }
+.group-grid .row-live .team-name { color: var(--turf); }
+.group-grid .row-live-dot {
+  background: var(--turf);
+}
+
+/* ---------- Drittplatzierte ---------- */
+.third-wrap { margin-top: 8px; }
+.third-table { width: 100%; border-collapse: collapse; background: var(--bg-card);
+  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
+.third-table th {
+  font-family: var(--font-mono); font-size: 10px; text-transform: uppercase;
+  letter-spacing: 0.06em; color: var(--ink-faint); padding: 11px 12px; text-align: right;
+  background: var(--bg-raised); border-bottom: 1px solid var(--line);
+}
+.third-table th:first-child, .third-table td:first-child { text-align: left; }
+.third-table td {
+  padding: 10px 12px; text-align: right; font-variant-numeric: tabular-nums;
+  border-top: 1px solid var(--line-soft); font-size: 13px;
+}
+.third-row.qual { background: linear-gradient(90deg, rgba(74,222,128,0.07), transparent); }
+.third-row.cut td { border-top: 2px solid var(--turf-deep); }
+.qual-badge {
+  font-family: var(--font-mono); font-size: 10px; padding: 2px 7px; border-radius: 999px;
+}
+.qual-badge.yes { background: rgba(74,222,128,0.16); color: var(--turf); }
+.qual-badge.no { background: rgba(95,109,146,0.16); color: var(--ink-faint); }
+
+/* Drittplatzierte: Teamname grün, wenn alle 3 Gruppenspiele gespielt */
+.third-table td.team-complete { color: var(--turf); }
+
+/* ---------- Bracket ---------- */
+.bracket-banner {
+  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
+  background: var(--bg-card); border: 1px solid var(--line);
+  border-radius: var(--radius); padding: 14px 16px; margin-bottom: 20px;
+}
+.bracket-banner .k {
+  font-family: var(--font-mono); font-size: 12px; color: var(--ink-dim);
+}
+.bracket-banner .v { font-family: var(--font-mono); font-size: 12px; color: var(--turf); }
+.bracket-scroll {
+  margin-left: -20px;
+  margin-right: -20px;
+  padding-left: 20px;
+  padding-right: 20px;
+  overflow-x: auto;
+  overflow-y: visible;
+  padding-bottom: 10px;
+  scrollbar-gutter: stable;
+}
+.bracket {
+  display: flex; gap: 26px; min-width: max-content; align-items: stretch;
+  padding-bottom: 8px;
+}
+.round { display: flex; flex-direction: column; min-width: 220px; }
+.round-label {
+  font-family: var(--font-display); font-weight: 800; text-transform: uppercase;
+  font-size: 12px; letter-spacing: 0.06em; color: var(--ink-faint);
+  margin-bottom: 10px; padding-left: 2px;
+}
+.round-matches { display: flex; flex-direction: column; justify-content: space-around; flex: 1; gap: 12px; }
+
+.tie {
+  background: var(--bg-card); border: 1px solid var(--line);
+  border-radius: var(--radius-sm); position: relative;
+}
+.tie.final-tie { border-color: var(--gold); box-shadow: 0 0 0 1px rgba(255,210,74,0.2); }
+.tie-meta {
+  font-family: var(--font-mono); font-size: 9px; color: rgba(255,255,255,0.55);
+  letter-spacing: 0.04em; padding: 5px 10px 0;
+  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
+}
+.match-badge {
+  position: absolute; top: -6px; right: -6px;
+  font-family: var(--font-mono); font-size: 9px; font-weight: 700;
+  line-height: 18px; min-width: 18px; text-align: center;
+  border-radius: 999px; padding: 0 4px;
+  background: #1a2744; color: #ffffff; border: 1px solid rgba(255,255,255,0.15);
+}
+.side {
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 8px 10px; font-size: 13px;
+}
+.side + .side { border-top: 1px solid var(--line-soft); }
+.side .nm { display: flex; align-items: center; gap: 7px; min-width: 0; }
+.side .nm .c { font-family: var(--font-mono); font-size: 10px; color: var(--ink-faint); }
+.side .lbl { color: var(--ink-dim); font-style: italic; }
+.side .sc { font-family: var(--font-mono); font-weight: 700; color: var(--floodlight); }
+.side.win .sc { color: var(--turf); }
+.side .prob {
+  font-family: var(--font-mono); font-size: 10px; color: var(--ink-faint);
+  margin-left: 6px;
+}
+
+.legend { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 16px;
+  font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); }
+.legend span { display: inline-flex; align-items: center; gap: 6px; }
+.legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
+
+/* Tooltip im K.o.-Baum (position: fixed, damit overflow-x den Tooltip nicht abschneidet) */
+.kobaum-tip {
+  position: fixed;
+  z-index: 200;
+  pointer-events: none;
+  background: var(--bg-card);
+  border: 1px solid var(--line);
+  color: var(--ink);
+  font-family: var(--font-mono);
+  font-size: 12px;
+  padding: 6px 9px;
+  border-radius: var(--radius-sm);
+  white-space: nowrap;
+  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
+}
+
+/* ---------- Zustände ---------- */
+.notice {
+  background: var(--bg-card); border: 1px solid var(--line);
+  border-radius: var(--radius); padding: 18px 20px; color: var(--ink-dim);
+  font-size: 14px;
+}
+.notice.err { border-color: #5a2230; color: #ffb0c0; }
+.skel { background: var(--bg-card); border: 1px solid var(--line);
+  border-radius: var(--radius); height: 220px; animation: shimmer 1.4s infinite; }
+@keyframes shimmer { 50% { opacity: .55; } }
+
+.foot {
+  border-top: 1px solid var(--line); padding: 24px 0 48px;
+  color: var(--ink-faint); font-size: 12px; font-family: var(--font-mono);
+}
+.foot a { color: var(--ink-dim); text-decoration: underline; text-underline-offset: 2px; }
+
+/* =====================================================================
+   MOBIL — Breakpoint 640px (iPhone ~375, Galaxy ~412, alle ≤640)
+   ===================================================================== */
+@media (max-width: 640px) {
+  body { font-size: 14px; }
+  .wrap { padding: 0 12px; }
+
+  /* ---------- mobil: Header ---------- */
+  .masthead { padding: 0 12px; }
+  .masthead-inner { padding: 10px 0; gap: 8px; }
+  .brand { gap: 6px; }
+  .brand-mark { font-size: 18px; }
+  .brand-sub { font-size: 9px; letter-spacing: 0.04em; }
+  .status-pill { font-size: 10px; padding: 4px 10px; gap: 5px; }
+  .dot { width: 6px; height: 6px; }
+
+  /* ---------- mobil: Tabs (zwei Zeilen, kein horizontaler Scroll) ---------- */
+  .masthead-tabs {
+    flex-wrap: wrap;
+    justify-content: center;
+    gap: 2px 4px;
+  }
+  .tab { padding: 8px 13px; font-size: 12px; }
+
+  .section { padding: 18px 0 48px; }
+
+  /* ---------- mobil: Gruppen ---------- */
+  .group-grid { grid-template-columns: 1fr; gap: 12px; }
+  .group-head { padding: 10px 12px; }
+  .group-name { font-size: 14px; }
+  .standings th { font-size: 9px; padding: 6px 3px; }
+  .standings th.team { padding-left: 10px; }
+  .standings td { font-size: 11px; padding: 7px 3px; }
+  .standings td.team { padding-left: 10px; gap: 6px; }
+  .rankdot { width: 16px; height: 16px; font-size: 8px; }
+  .team-name { font-size: 12px; }
+
+  /* ---------- mobil: Spiele (Fixtures) ---------- */
+  .fx { grid-template-columns: 1fr; gap: 8px; padding: 10px 12px; }
+  .fx-meta { flex-direction: row; gap: 14px; align-items: center; }
+  .fx-status { order: -1; }
+  .fx-teams { column-gap: 16px; }
+  .fx-score { font-size: 16px; min-width: 44px; }
+  .fx-vs { font-size: 14px; min-width: 44px; }
+  .fx-name { font-size: 13px; max-width: 110px; }
+  .grp-switch { gap: 8px; }
+  .grp-chip { width: 40px; height: 40px; font-size: 14px; }
+
+  /* ---------- mobil: Drittplatzierte ---------- */
+  .third-table th { font-size: 9px; padding: 8px 6px; }
+  .third-table td { font-size: 11px; padding: 7px 6px; }
+
+  /* ---------- mobil: K.o.-Baum ---------- */
+  .bracket-scroll {
+    margin-left: -12px;
+    margin-right: -12px;
+    padding-left: 12px;
+    padding-right: 12px;
+    -webkit-overflow-scrolling: touch;
+  }
+  .bracket { gap: 18px; }
+  .round { min-width: 170px; }
+  .round-label { font-size: 10px; }
+  .round-matches { gap: 8px; }
+  .tie-meta { font-size: 8px; padding: 3px 8px 0; }
+  .side { padding: 6px 8px; font-size: 11px; }
+  .side .nm { gap: 5px; }
+  .prov-mark { font-size: 10px; }
+  .side .prob { font-size: 9px; }
+  .bracket-banner { padding: 10px 12px; font-size: 13px; }
+  .legend { font-size: 10px; gap: 12px; }
+
+  /* ---------- mobil: Simulation ---------- */
+  .sim-row { flex-wrap: wrap; gap: 6px; padding: 8px 10px; }
+  .sim-row-phase { min-width: 100%; font-size: 9px; }
+  .sim-row-date { min-width: auto; font-size: 9px; }
+  .sim-row input[type="number"] { width: 32px; height: 32px; font-size: 15px; }
+
+  /* ---------- mobil: Footer ---------- */
+  .foot { font-size: 11px; padding: 16px 0 32px; }
+
+  /* Kein horizontaler Überlauf außer im Bracket */
+  body { overflow-x: hidden; }
+  .bracket-scroll { overflow-x: auto; }
+}
+
+/* ============ Erweiterungen v2 ============ */
+
+/* Flaggen / Wappen */
+.flag {
+  border-radius: 50%; object-fit: cover; flex: none;
+  background: var(--bg-raised); border: 1px solid var(--line-soft);
+}
+.flag-fallback {
+  display: grid; place-items: center;
+  font-family: var(--font-mono); font-size: 9px; color: var(--ink-faint);
+  text-transform: uppercase;
+}
+
+/* Gruppen-Header als Button */
+.group-head-btn {
+  width: 100%; cursor: pointer; text-align: left;
+  font: inherit; color: inherit;
+  transition: background .15s;
+}
+.group-head-btn:hover { background: var(--bg-card); }
+.group-head-btn:hover .group-tag { color: var(--turf); }
+.group-head-btn:focus-visible { outline: 2px solid var(--turf); outline-offset: -2px; }
+
+/* Gruppen-Wechsler im Spiele-Tab */
+.grp-switch { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
+.grp-chip {
+  width: 38px; height: 38px; border-radius: 8px;
+  border: 1px solid var(--line); background: var(--bg-card);
+  color: var(--ink-dim); font-family: var(--font-display); font-weight: 700;
+  font-size: 14px; cursor: pointer; transition: all .15s;
+}
+.grp-chip:hover { border-color: var(--turf); color: var(--ink); }
+.grp-chip.active { background: var(--turf); color: var(--bg); border-color: var(--turf); }
+
+/* Spiele-Karten */
+.fixtures { display: flex; flex-direction: column; gap: 10px; }
+.fx {
+  background: var(--bg-card); border: 1px solid var(--line);
+  border-radius: var(--radius); padding: 12px 16px;
+  display: grid; grid-template-columns: 110px minmax(0, 560px) 1fr; gap: 14px; align-items: center;
+}
+.fx-live { border-color: rgba(255,61,127,0.4); }
+.fx-status {
+  display: flex; align-items: center; gap: 7px;
+  font-family: var(--font-mono); font-size: 12px; color: var(--ink-dim);
+}
+.fx-teams {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
+  align-items: center; column-gap: 34px;
+}
+/* Beide Teams: Flagge links, Name daneben. Linkes Team rechtsbündig an den Score,
+   rechtes Team linksbündig – so ist der Abstand zum Ergebnis beidseitig gleich. */
+.fx-team { display: flex; align-items: center; gap: 8px; min-width: 0; }
+.fx-team.home { justify-content: flex-end; }
+.fx-team.away { justify-content: flex-start; }
+.fx-team .fx-name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.fx-team.win .fx-name { color: var(--turf); }
+.fx-score { font-family: var(--font-mono); font-weight: 700; font-size: 18px; color: var(--floodlight); white-space: nowrap; text-align: center; min-width: 54px; }
+.fx-score.score-live { color: var(--live); }
+.fx-vs { font-family: var(--font-mono); font-size: 15px; color: var(--ink-faint); text-align: center; min-width: 54px; }
+.fx-meta {
+  display: flex; flex-direction: column; gap: 3px; align-items: flex-end;
+  font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); white-space: nowrap;
+}
+/* Austragungsort heller hervorheben. */
+.fx-venue { color: var(--ink-dim); }
+
+/* Live-Tabelle der Gruppe unterhalb der Spiele. */
+.fx-standings { margin-top: 22px; }
+.fx-standings-title {
+  font-family: var(--font-display, var(--font-mono)); font-size: 13px; letter-spacing: 0.06em;
+  text-transform: uppercase; color: var(--ink-dim); margin: 0 2px 10px;
+  display: flex; align-items: center; gap: 10px;
+}
+.fx-standings-live {
+  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
+  color: var(--live); font-weight: 700;
+  animation: livepulse 1.6s ease-in-out infinite;
+}
+.fx-standings .standings { width: 100%; }
+/* Zeile eines Teams mit laufendem Spiel hervorheben. */
+.fx-standings .row-live { background: rgba(255, 61, 127, 0.07); }
+.fx-standings .row-live .team-name { color: var(--floodlight); }
+.row-live-dot {
+  display: inline-block; width: 7px; height: 7px; border-radius: 50%;
+  background: var(--live); margin-left: 8px; vertical-align: middle;
+  animation: livepulse 1.6s ease-in-out infinite;
+}
+@keyframes livepulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.35; }
+}
+
+@media (max-width: 720px) {
+  .fx { grid-template-columns: 1fr; gap: 8px; }
+  .fx-meta { flex-direction: row; gap: 14px; align-items: center; }
+  .fx-status { order: -1; }
+}
+
+/* Bracket: Label-Header braucht kein Extra-Padding mehr (sitzt im Kasten) */
+.round-matches { padding-top: 0; }
+
+/* Bracket: fix vs. vorläufig.
+   .nm trägt die Standardfarbe; Team-Name liegt in .tn. */
+.side .nm .tn { color: var(--ink); }
+
+/* vorläufig: gedimmt + kursiv + Marker */
+.side.prov .nm .tn { color: var(--ink-dim); font-style: italic; }
+.prov-mark {
+  color: #f0a23a; font-family: var(--font-mono); font-weight: 700;
+  font-size: 12px; margin-left: 2px;
+}
+
+/* fix: echtes Team steht fest -> fett weiß + grüner Marker links */
+.side.fix .nm .tn { color: #ffffff; font-weight: 700; }
+.side.fix { box-shadow: inset 3px 0 0 var(--turf-deep); }
+
+/* Sieger eines bereits gespielten Tie sticht zusätzlich grün hervor */
+.side.win .nm .tn { color: var(--turf); font-weight: 700; }
+.side.win { box-shadow: inset 3px 0 0 var(--turf); }
+
+/* Legende-Marker */
+.legend i.leg-fix { background: var(--turf-deep); }
+.legend i.leg-prov {
+  background: repeating-linear-gradient(45deg, #f0a23a, #f0a23a 3px, transparent 3px, transparent 6px);
+  border: 1px solid #f0a23a;
+}
\ No newline at end of file
diff --git a/app/[locale]/layout.tsx b/app/[locale]/layout.tsx
new file mode 100644
index 0000000..2aedc84
--- /dev/null
+++ b/app/[locale]/layout.tsx
@@ -0,0 +1,36 @@
+import type { Metadata } from "next";
+import Script from "next/script";
+import { Locale, getDictionary } from "@/lib/i18n";
+
+export async function generateMetadata({ params }: { params: Promise<{ locale: string }> }): Promise<Metadata> {
+  const { locale } = await params;
+  const dict = getDictionary(locale as Locale);
+  return {
+    title: dict.meta.title,
+    description: dict.meta.description,
+  };
+}
+
+export async function generateStaticParams() {
+  return [{ locale: "en" }, { locale: "de" }];
+}
+
+export default function LocaleLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <>
+      {children}
+      {process.env.NEXT_PUBLIC_UMAMI_SRC && process.env.NEXT_PUBLIC_UMAMI_ID && (
+        <Script
+          defer
+          src={process.env.NEXT_PUBLIC_UMAMI_SRC}
+          data-website-id={process.env.NEXT_PUBLIC_UMAMI_ID}
+          strategy="afterInteractive"
+        />
+      )}
+    </>
+  );
+}
diff --git a/app/page.tsx b/app/[locale]/page.tsx
similarity index 100%
rename from app/page.tsx
rename to app/[locale]/page.tsx
diff --git a/app/layout.tsx b/app/layout.tsx
index aef8020..449ea9f 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -1,21 +1,8 @@
-import type { Metadata } from "next";
-import Script from "next/script";
 import "./globals.css";
 
-export const metadata: Metadata = {
-  title: "WM 26 — Gruppen & K.o.-Baum",
-  description:
-    "Live-Gruppentabellen, Drittplatzierten-Wertung und der vollständige K.o.-Baum der FIFA WM 2026 mit Annex-C-Zuordnung und Polymarket-Wahrscheinlichkeiten.",
-};
-
-export const viewport = {
-  width: "device-width",
-  initialScale: 1,
-};
-
 export default function RootLayout({ children }: { children: React.ReactNode }) {
   return (
-    <html lang="de">
+    <html lang="en">
       <head>
         <link rel="preconnect" href="https://fonts.googleapis.com" />
         <link rel="preconnect" href="https://fonts.gstatic.com" crossOrigin="" />
@@ -24,17 +11,7 @@ export default function RootLayout({ children }: { children: React.ReactNode })
           rel="stylesheet"
         />
       </head>
-      <body>
-        {children}
-        {process.env.NEXT_PUBLIC_UMAMI_SRC && process.env.NEXT_PUBLIC_UMAMI_ID && (
-          <Script
-            defer
-            src={process.env.NEXT_PUBLIC_UMAMI_SRC}
-            data-website-id={process.env.NEXT_PUBLIC_UMAMI_ID}
-            strategy="afterInteractive"
-          />
-        )}
-      </body>
+      <body>{children}</body>
     </html>
   );
 }
diff --git a/lib/i18n/de.ts b/lib/i18n/de.ts
new file mode 100644
index 0000000..4ca68f8
--- /dev/null
+++ b/lib/i18n/de.ts
@@ -0,0 +1,140 @@
+import { Dictionary } from "./types";
+
+const de: Dictionary = {
+  meta: {
+    title: "WM 26 — Gruppen & K.o.-Baum",
+    description:
+      "Live-Gruppentabellen, Drittplatzierten-Wertung und der vollständige K.o.-Baum der FIFA WM 2026 mit Annex-C-Zuordnung und Polymarket-Wahrscheinlichkeiten.",
+  },
+  header: {
+    hostCountries: "USA · Kanada · Mexiko",
+  },
+  status: {
+    feedOffline: "Feed offline",
+    updated: (time: string) => `Aktualisiert ${time}`,
+    live: "Live",
+    loading: "Lade Daten…",
+    running: "läuft",
+    halftime: "Halbzeit",
+    finished: "Beendet",
+    postponed: "Verzögert",
+  },
+  nav: {
+    koFixtures: "K.O.-Spiele",
+    groups: "Gruppen",
+    groupFixtures: (group: string) => `Gruppenspiele – ${group}`,
+    groupFixturesNoGroup: "Gruppenspiele",
+    thirdPlace: "Drittplatzierte",
+    bracket: "K.o.-Baum",
+    simulation: "Simulation",
+  },
+  error: {
+    feedUnreachable:
+      "Die Live-Feeds sind gerade nicht erreichbar. Die Seite versucht es automatisch erneut.",
+    unknown: "unbekannter Fehler",
+  },
+  footer: {
+    dashboard: "WM 2026 Dashboard",
+    dataSources: "Daten: football-data.org · Polymarket Gamma API · FIFA Annex C",
+  },
+  sim: {
+    notice:
+      "Simulation — alle ungespielten Spiele sind mit dem Polymarket-Favoriten vorbelegt. Die angezeigten Wahrscheinlichkeiten stammen von Polymarket.",
+    heading: "Simulierter K.o.-Baum",
+  },
+  koFixtures: {
+    noMatches: "Keine K.o.-Spiele mit bekannten Teams verfügbar.",
+    liveBadge: "LIVE",
+    nextMatch: "NÄCHSTES SPIEL",
+    postponedBadge: "VERZÖGERT",
+    match: (n: number) => `Spiel ${n}`,
+  },
+  label: {
+    goals: "Tore",
+    liveIndicator: "● LIVE",
+    scrollToTop: "Nach oben scrollen",
+    securelyQualified: "sicher qualifiziert",
+  },
+  stage: {
+    r16: "Achtelfinale",
+    qf: "Viertelfinale",
+    sf: "Halbfinale",
+    thirdPlace: "Platz 3",
+    final: "Finale",
+  },
+  round: {
+    r32: "Letzte 32",
+    r16: "Achtelfinale",
+    qf: "Viertelfinale",
+    sf: "Halbfinale",
+    final: "Finale",
+    thirdPlace: "Spiel um Platz 3",
+  },
+  bracket: {
+    provisionalTooltip: "vorläufig – Gruppe/Zuordnung noch nicht fix",
+    match: (n: number) => `Spiel ${n}`,
+    penaltyShootout: "i.E.",
+    annexHeader: "Annex-C-Zuordnung der Drittplatzierten:",
+    annexResolved:
+      "aufgelöst — die acht Dritten sind den Gruppensiegern fest zugeteilt",
+    annexPending:
+      "noch offen — sobald die 8 besten Dritten feststehen, verbindet sich der Baum automatisch",
+    winner: "Sieger",
+    loser: "Verlierer",
+    winnerFromMatch: (n: number) => `Sieger aus Spiel ${n}`,
+    loserFromMatch: (n: number) => `Verlierer aus Spiel ${n}`,
+  },
+  legend: {
+    winner: "Sieger / weiter",
+    final: "Finale",
+    fixed: "fix qualifiziert",
+    provisional: "vorläufig (≈, nach aktueller Tabelle)",
+    placeholder: "Platzhalter offen",
+    probExplanation:
+      "%-Werte: Polymarket-Wahrscheinlichkeit (falls verfügbar)",
+  },
+  tooltips: {
+    provisionalPrefix: "aktuell",
+    firstOfGroup: (group: string) => `1. Gruppe ${group}`,
+    secondOfGroup: (group: string) => `2. Gruppe ${group}`,
+    thirdOfGroup: (group: string) => `3. der Gruppe ${group}`,
+    provisionalThird: (pool: string) => `aktuell 3. Gruppe ${pool}`,
+  },
+  slot: {
+    winner: (group: string) => `Sieger ${group}`,
+    runnerUp: (group: string) => `Zweiter ${group}`,
+    thirdOfGroup: (group: string) => `3. der Gruppe ${group}`,
+    thirdPlacePool: (pool: string) => `3. ${pool}`,
+  },
+  table: {
+    rank: "#",
+    team: "Mannschaft",
+    group: "Gruppe",
+    matches: "Sp",
+    won: "S",
+    drawn: "U",
+    lost: "N",
+    goals: "Tore",
+    goalDiff: "±",
+    points: "Pkt",
+    status: "Status",
+  },
+  thirds: {
+    explanation:
+      "Acht der zwölf Gruppendritten erreichen die Runde der letzten 32. Gewertet wird gruppenübergreifend nach Punkten, Tordifferenz und Toren — der Direktvergleich entfällt, weil diese Teams nie gegeneinander gespielt haben. Die Trennlinie markiert den Schnitt zwischen Platz 8 und 9.",
+    advances: "weiter",
+    eliminated: "raus",
+  },
+  fixtures: {
+    standingsTitle: (group: string) => `Tabelle – Gruppe ${group}`,
+    noMatches: (group: string) =>
+      `Für Gruppe ${group} liegen noch keine Spiele im Feed vor.`,
+  },
+  groups: {
+    viewGroupGames: (group: string) => `Spiele der Gruppe ${group} ansehen`,
+    groupLabel: (group: string) => `Gruppe ${group}`,
+    viewGames: "Spiele ansehen →",
+  },
+};
+
+export default de;
diff --git a/lib/i18n/en.ts b/lib/i18n/en.ts
new file mode 100644
index 0000000..3f0af54
--- /dev/null
+++ b/lib/i18n/en.ts
@@ -0,0 +1,145 @@
+import { Dictionary } from "./types";
+
+function ordinal(n: number): string {
+  const s = ["th", "st", "nd", "rd"];
+  const v = n % 100;
+  return n + (s[(v - 20) % 10] || s[v] || s[0]);
+}
+
+const en: Dictionary = {
+  meta: {
+    title: "WC 26 — Groups & KO Bracket",
+    description:
+      "Live group tables, third-place ranking and the complete KO bracket for the FIFA World Cup 2026 with Annex C assignment and Polymarket probabilities.",
+  },
+  header: {
+    hostCountries: "USA · Canada · Mexico",
+  },
+  status: {
+    feedOffline: "Feed offline",
+    updated: (time: string) => `Updated ${time}`,
+    live: "Live",
+    loading: "Loading…",
+    running: "running",
+    halftime: "Half time",
+    finished: "Finished",
+    postponed: "Postponed",
+  },
+  nav: {
+    koFixtures: "KO Matches",
+    groups: "Groups",
+    groupFixtures: (group: string) => `Group Stage – ${group}`,
+    groupFixturesNoGroup: "Group Stage",
+    thirdPlace: "Third Place",
+    bracket: "KO Bracket",
+    simulation: "Simulation",
+  },
+  error: {
+    feedUnreachable:
+      "Live feeds are currently unavailable. The page will retry automatically.",
+    unknown: "unknown error",
+  },
+  footer: {
+    dashboard: "WC 2026 Dashboard",
+    dataSources: "Data: football-data.org · Polymarket Gamma API · FIFA Annex C",
+  },
+  sim: {
+    notice:
+      "Simulation — all unplayed matches are pre-filled with the Polymarket favourite. Probabilities shown are from Polymarket.",
+    heading: "Simulated KO Bracket",
+  },
+  koFixtures: {
+    noMatches: "No KO matches with known teams available.",
+    liveBadge: "LIVE",
+    nextMatch: "NEXT MATCH",
+    postponedBadge: "POSTPONED",
+    match: (n: number) => `Match ${n}`,
+  },
+  label: {
+    goals: "Goals",
+    liveIndicator: "● LIVE",
+    scrollToTop: "Scroll to top",
+    securelyQualified: "securely qualified",
+  },
+  stage: {
+    r16: "Round of 16",
+    qf: "Quarter-finals",
+    sf: "Semi-finals",
+    thirdPlace: "3rd Place",
+    final: "Final",
+  },
+  round: {
+    r32: "Round of 32",
+    r16: "Round of 16",
+    qf: "Quarter-finals",
+    sf: "Semi-finals",
+    final: "Final",
+    thirdPlace: "Third Place Match",
+  },
+  bracket: {
+    provisionalTooltip: "provisional – group/assignment not yet fixed",
+    match: (n: number) => `Match ${n}`,
+    penaltyShootout: "PSO",
+    annexHeader: "Annex C third-place assignment:",
+    annexResolved:
+      "resolved — the eight third-placed teams are permanently assigned to group winners",
+    annexPending:
+      "pending — once the 8 best third-placed teams are determined, the bracket auto-connects",
+    winner: "Winner",
+    loser: "Loser",
+    winnerFromMatch: (n: number) => `Winner of match ${n}`,
+    loserFromMatch: (n: number) => `Loser of match ${n}`,
+  },
+  legend: {
+    winner: "Winner / advances",
+    final: "Final",
+    fixed: "securely qualified",
+    provisional: "provisional (≈, current standings)",
+    placeholder: "placeholder open",
+    probExplanation: "% values: Polymarket probability (if available)",
+  },
+  tooltips: {
+    provisionalPrefix: "currently",
+    firstOfGroup: (group: string) => `${ordinal(1)} in Group ${group}`,
+    secondOfGroup: (group: string) => `${ordinal(2)} in Group ${group}`,
+    thirdOfGroup: (group: string) => `${ordinal(3)} in Group ${group}`,
+    provisionalThird: (pool: string) => `currently 3rd of Group ${pool}`,
+  },
+  slot: {
+    winner: (group: string) => `Winner ${group}`,
+    runnerUp: (group: string) => `Runner-up ${group}`,
+    thirdOfGroup: (group: string) => `3rd of Group ${group}`,
+    thirdPlacePool: (pool: string) => `3rd ${pool}`,
+  },
+  table: {
+    rank: "#",
+    team: "Team",
+    group: "Group",
+    matches: "GP",
+    won: "W",
+    drawn: "D",
+    lost: "L",
+    goals: "Goals",
+    goalDiff: "±",
+    points: "Pts",
+    status: "Status",
+  },
+  thirds: {
+    explanation:
+      "Eight of the twelve group third-placed teams advance to the Round of 32. Ranking is across all groups by points, goal difference and goals scored — head-to-head does not apply because these teams have never met. The separator marks the cut between 8th and 9th place.",
+    advances: "advances",
+    eliminated: "out",
+  },
+  fixtures: {
+    standingsTitle: (group: string) => `Standings – Group ${group}`,
+    noMatches: (group: string) =>
+      `No matches available yet for Group ${group}.`,
+  },
+  groups: {
+    viewGroupGames: (group: string) => `View Group ${group} matches`,
+    groupLabel: (group: string) => `Group ${group}`,
+    viewGames: "View matches →",
+  },
+};
+
+export default en;
diff --git a/lib/i18n/index.ts b/lib/i18n/index.ts
new file mode 100644
index 0000000..de28f03
--- /dev/null
+++ b/lib/i18n/index.ts
@@ -0,0 +1,11 @@
+import { Locale, Dictionary } from "./types";
+import de from "./de";
+import en from "./en";
+
+export const dictionaries: Record<Locale, Dictionary> = { de, en };
+
+export function getDictionary(locale: Locale): Dictionary {
+  return dictionaries[locale] ?? en;
+}
+
+export { type Locale, type Dictionary } from "./types";
diff --git a/lib/i18n/types.ts b/lib/i18n/types.ts
new file mode 100644
index 0000000..989b51c
--- /dev/null
+++ b/lib/i18n/types.ts
@@ -0,0 +1,130 @@
+export type Locale = "de" | "en";
+
+export interface Dictionary {
+  meta: {
+    title: string;
+    description: string;
+  };
+  header: {
+    hostCountries: string;
+  };
+  status: {
+    feedOffline: string;
+    updated: (time: string) => string;
+    live: string;
+    loading: string;
+    running: string;
+    halftime: string;
+    finished: string;
+    postponed: string;
+  };
+  nav: {
+    koFixtures: string;
+    groups: string;
+    groupFixtures: (group: string) => string;
+    groupFixturesNoGroup: string;
+    thirdPlace: string;
+    bracket: string;
+    simulation: string;
+  };
+  error: {
+    feedUnreachable: string;
+    unknown: string;
+  };
+  footer: {
+    dashboard: string;
+    dataSources: string;
+  };
+  sim: {
+    notice: string;
+    heading: string;
+  };
+  koFixtures: {
+    noMatches: string;
+    liveBadge: string;
+    nextMatch: string;
+    postponedBadge: string;
+    match: (n: number) => string;
+  };
+  label: {
+    goals: string;
+    liveIndicator: string;
+    scrollToTop: string;
+    securelyQualified: string;
+  };
+  stage: {
+    r16: string;
+    qf: string;
+    sf: string;
+    thirdPlace: string;
+    final: string;
+  };
+  round: {
+    r32: string;
+    r16: string;
+    qf: string;
+    sf: string;
+    final: string;
+    thirdPlace: string;
+  };
+  bracket: {
+    provisionalTooltip: string;
+    match: (n: number) => string;
+    penaltyShootout: string;
+    annexHeader: string;
+    annexResolved: string;
+    annexPending: string;
+    winner: string;
+    loser: string;
+    winnerFromMatch: (n: number) => string;
+    loserFromMatch: (n: number) => string;
+  };
+  legend: {
+    winner: string;
+    final: string;
+    fixed: string;
+    provisional: string;
+    placeholder: string;
+    probExplanation: string;
+  };
+  tooltips: {
+    provisionalPrefix: string;
+    firstOfGroup: (group: string) => string;
+    secondOfGroup: (group: string) => string;
+    thirdOfGroup: (group: string) => string;
+    provisionalThird: (pool: string) => string;
+  };
+  slot: {
+    winner: (group: string) => string;
+    runnerUp: (group: string) => string;
+    thirdOfGroup: (group: string) => string;
+    thirdPlacePool: (pool: string) => string;
+  };
+  table: {
+    rank: string;
+    team: string;
+    group: string;
+    matches: string;
+    won: string;
+    drawn: string;
+    lost: string;
+    goals: string;
+    goalDiff: string;
+    points: string;
+    status: string;
+  };
+  thirds: {
+    explanation: string;
+    advances: string;
+    eliminated: string;
+  };
+  fixtures: {
+    standingsTitle: (group: string) => string;
+    noMatches: (group: string) => string;
+  };
+  groups: {
+    viewGroupGames: (group: string) => string;
+    groupLabel: (group: string) => string;
+    viewGames: string;
+  };
+}
diff --git a/middleware.ts b/middleware.ts
new file mode 100644
index 0000000..786942a
--- /dev/null
+++ b/middleware.ts
@@ -0,0 +1,42 @@
+import { NextResponse } from "next/server";
+import type { NextRequest } from "next/server";
+
+const SUPPORTED_LOCALES = ["en", "de"] as const;
+
+function getLocale(request: NextRequest): string {
+  const acceptLang = request.headers.get("accept-language") ?? "";
+  const preferred = acceptLang.split(",")[0]?.trim().slice(0, 2);
+  if (preferred && SUPPORTED_LOCALES.includes(preferred as any)) return preferred;
+  return "en";
+}
+
+export function middleware(request: NextRequest) {
+  const { pathname } = request.nextUrl;
+
+  // API routes and static files pass through
+  if (
+    pathname.startsWith("/api/") ||
+    pathname.includes(".") ||
+    pathname.startsWith("/_next")
+  ) {
+    return NextResponse.next();
+  }
+
+  // Check if pathname already has a supported locale
+  const hasLocale = SUPPORTED_LOCALES.some(
+    (l) => pathname === `/${l}` || pathname.startsWith(`/${l}/`),
+  );
+
+  if (!hasLocale) {
+    const locale = getLocale(request);
+    const url = request.nextUrl.clone();
+    url.pathname = `/${locale}${pathname === "/" ? "" : pathname}`;
+    return NextResponse.redirect(url);
+  }
+
+  return NextResponse.next();
+}
+
+export const config = {
+  matcher: ["/((?!_next|api|favicon.ico).*)"],
+};