diff --git a/static/style.css b/static/style.css
index 723334b..8edeb5e 100644
--- a/static/style.css
+++ b/static/style.css
@@ -146,22 +146,78 @@ button:focus, .accordion-header:focus {
 .accordion-content.active {
     display: block;
 }
-.header-tage { background: #2563eb; }
-.header-tage.active, .header-tage:hover { background: #1e40af; }
-.header-werktage { background: #059669; }
-.header-werktage.active, .header-werktage:hover { background: #047857; }
-.header-wochentag { background: #f59e42; color: #fff; }
-.header-wochentag.active, .header-wochentag:hover { background: #d97706; }
-.header-plusminus-tage { background: #a21caf; }
-.header-plusminus-tage.active, .header-plusminus-tage:hover { background: #701a75; }
-.header-plusminus-werktage { background: #0ea5e9; }
-.header-plusminus-werktage.active, .header-plusminus-werktage:hover { background: #0369a1; }
-.header-plusminus-wochenmonate { background: #f43f5e; }
-.header-plusminus-wochenmonate.active, .header-plusminus-wochenmonate:hover { background: #be123c; }
-.header-kw { background: #a78bfa; color: #1e293b; }
-.header-kw.active, .header-kw:hover { background: #7c3aed; }
-.header-kw-datum { background: #facc15; color: #1e293b; }
-.header-kw-datum.active, .header-kw-datum:hover { background: #ca8a04; }
+.header-tage {
+    background: #2563eb;
+    color: #fff;
+}
+.header-tage.active, .header-tage:hover {
+    background: #1e40af;
+    color: #fff;
+}
+.header-werktage {
+    background: #059669;
+    color: #fff;
+}
+.header-werktage.active, .header-werktage:hover {
+    background: #047857;
+    color: #fff;
+}
+.header-wochentag {
+    background: #f59e42;
+    color: #1e293b;
+}
+.header-wochentag.active, .header-wochentag:hover {
+    background: #d97706;
+    color: #fff;
+}
+.header-plusminus-tage {
+    background: #a21caf;
+    color: #fff;
+}
+.header-plusminus-tage.active, .header-plusminus-tage:hover {
+    background: #701a75;
+    color: #fff;
+}
+.header-plusminus-werktage {
+    background: #0ea5e9;
+    color: #fff;
+}
+.header-plusminus-werktage.active, .header-plusminus-werktage:hover {
+    background: #0369a1;
+    color: #fff;
+}
+.header-plusminus-wochenmonate {
+    background: #f43f5e;
+    color: #fff;
+}
+.header-plusminus-wochenmonate.active, .header-plusminus-wochenmonate:hover {
+    background: #be123c;
+    color: #fff;
+}
+.header-kw {
+    background: #a78bfa;
+    color: #1e293b;
+}
+.header-kw.active, .header-kw:hover {
+    background: #7c3aed;
+    color: #fff;
+}
+.header-kw-datum {
+    background: #facc15;
+    color: #1e293b;
+}
+.header-kw-datum.active, .header-kw-datum:hover {
+    background: #ca8a04;
+    color: #fff;
+}
+.header-plusminus {
+    background: #be123c;
+    color: #fff;
+}
+.header-plusminus.active, .header-plusminus:hover {
+    background: #7f1d1d;
+    color: #fff;
+}
 @media (max-width: 600px) {
     .container {
         margin: 1em;