diff --git a/index.css b/index.css
index c0e8674..881bcdd 100644
--- a/index.css
+++ b/index.css
@@ -1,22 +1,46 @@
 /* Public Domain */
 
 :root {
+    /* Farben */
     --primary-color: #ff9999;
+    --primary-color-hover: #ff7777;
+    --success-color: #d2f8d2;
+    --success-color-hover: #b8e9b8;
+    --background-color: #fafafa;
+    --header-background: #FFFFE3;
+    --modal-background: #fff;
+    --modal-background-export: #f9f9f9;
+    --item-background: #f1f1f1;
+    --item-hover: #e6e6e6;
+    --button-background: #f0f0f0;
+    --button-hover: #e0e0e0;
+    --button-color: #fff;
+    --border-color: #ddd;
+    --text-color: #333;
+    --text-color-light: #666;
+    --text-color-lighter: #ccc;
+    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+    --modal-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
+
+    /* Schriftfamilie */
+    --font-family: Arial, sans-serif;
+
+    /* Layout Fix */
     --header-height: 120px;
-    --padding-top: calc(10px + var(--header-height));
-    --box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+    --padding-top: calc(var(--header-height) + 20px);
 }
 
 body {
-    font-family: Arial, sans-serif;
+    font-family: var(--font-family);
     text-align: center;
     margin: 0;
     padding: 20px;
     padding-top: var(--padding-top);
+    background-color: var(--background-color);
 }
 
 .header {
-    background-color: #FFFFE3;
+    background-color: var(--header-background);
     height: var(--header-height);
     padding-bottom: 10px;
     position: fixed;
@@ -24,7 +48,7 @@ body {
     left: 0;
     width: 100%;
     z-index: 1000;
-    box-shadow: var(--box-shadow);
+    box-shadow: var(--shadow);
 }
 
 .titel {
@@ -40,12 +64,12 @@ body {
 }
 
 .hidden {
-    display: none;
+    display: none !important;
 }
 
 .stop-button {
     background-color: var(--primary-color);
-    color: #fff;
+    color: var(--button-color);
     font-weight: bold;
     border: none;
     border-radius: 5px;
@@ -57,6 +81,11 @@ body {
     transition: background-color 0.3s ease;
     position: relative;
     top: -2px;
+    font-family: var(--font-family);
+}
+
+.stop-button:hover {
+    background-color: var(--primary-color-hover);
 }
 
 .stop-button:focus {
@@ -68,39 +97,47 @@ body {
     font-weight: bold;
     font-size: 16px;
     margin-bottom: 15px;
+    font-family: var(--font-family);
 }
 
 #aktueller-sender {
-    background-color: #d2f8d2;
+    background-color: var(--success-color);
     border-radius: 5px;
     padding: 10px 20px;
+    display: inline-block;
 }
 
 .preset-container {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
     grid-gap: 20px;
-    margin: 30px 0;
+    margin: 30px auto;
+    max-width: 1200px;
+    padding: 0 10px;
 }
 
 .preset-item {
-    background-color: #f1f1f1;
-    padding: 15px;
+    background-color: var(--item-background);
+    padding: 0 15px;
     border-radius: 5px;
-    box-shadow: var(--box-shadow);
+    box-shadow: var(--shadow);
     cursor: pointer;
-    transition: background-color 0.3s ease;
+    transition: all 0.3s ease;
     display: flex;
     align-items: center;
+    min-height: 50px;
 }
 
 .preset-item h3 {
     margin: 0;
     flex: 1;
+    text-align: left;
+    word-break: break-word;
+    font-family: var(--font-family);
 }
 
 .preset-item:hover {
-    background-color: #e6e6e6;
+    background-color: var(--item-hover);
     box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
 }
 
@@ -108,6 +145,47 @@ body {
     display: flex;
     justify-content: center;
     gap: 10px;
+    flex-wrap: wrap;
+    margin: 20px auto 0 auto;
+    border-top: 1px solid var(--border-color); 
+    padding-top: 15px;
+}
+
+.button-container button {
+    padding: 10px 20px;
+    min-width: 120px;
+    border: none;
+    border-radius: 5px;
+    background-color: var(--button-background);
+    cursor: pointer;
+    transition: background-color 0.3s ease;
+    font-family: var(--font-family);
+    font-size: 14px;
+}
+
+.button-container button:hover {
+    background-color: var(--button-hover);
+}
+
+/* Spezifische Klassen für farbige Buttons */
+.btn-ok {
+    background-color: var(--success-color) !important;
+    color: var(--text-color) !important;
+    border: 1px solid var(--border-color) !important;
+}
+
+.btn-ok:hover {
+    background-color: var(--success-color-hover) !important;
+}
+
+.btn-cancel {
+    background-color: var(--button-background) !important;
+    color: var(--text-color) !important;
+    border: 1px solid var(--border-color) !important;
+}
+
+.btn-cancel:hover {
+    background-color: var(--button-hover) !important;
 }
 
 .footer {
@@ -116,22 +194,18 @@ body {
     justify-content: center;
     margin: 20px 0;
     font-size: 12px;
-    color: #666;
+    color: var(--text-color-light);
 }
 
 .footer a {
-    color: #666;
+    color: var(--text-color-light);
     text-decoration: none;
+    margin: 0 5px;
+    font-family: var(--font-family);
 }
 
 .footer a:hover {
-    color: #333;
-}
-
-@media (max-width: 600px) {
-    .preset-container {
-        grid-template-columns: 1fr;
-    }
+    color: var(--text-color);
 }
 
 /* ===== Modal Styles ===== */
@@ -140,10 +214,10 @@ body {
     top: 50%;
     left: 50%;
     transform: translate(-50%, -50%);
-    background-color: white;
+    background-color: var(--modal-background);
     padding: 20px;
     border-radius: 10px;
-    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
+    box-shadow: var(--modal-shadow);
     z-index: 1000;
     max-width: 800px;
     width: 90%;
@@ -156,6 +230,11 @@ body {
     display: flex;
     flex-direction: column;
     gap: 20px;
+    font-family: var(--font-family);
+}
+
+.modal-content h2 {
+    color: var(--text-color);
 }
 
 .modal-content table {
@@ -165,12 +244,13 @@ body {
 
 .modal-content th,
 .modal-content td {
-    border: 1px solid #ddd;
+    border: 1px solid var(--border-color);
     padding: 8px;
+    font-family: var(--font-family);
 }
 
 .modal-content th {
-    background-color: #f2f2f2;
+    background-color: var(--button-background);
 }
 
 .modal-content .drag-handle {
@@ -181,4 +261,133 @@ body {
 .modal-content input[type="text"] {
     width: 100%;
     box-sizing: border-box;
+    font-family: var(--font-family);
 }
+
+.modal-content th:nth-child(1),
+.modal-content td:nth-child(1) { min-width: 10px; max-width: 10px; }
+.modal-content th:nth-child(4),
+.modal-content td:nth-child(4) { min-width: 10px; max-width: 10px; text-align: center; }
+
+.delete-btn {
+    background: none;
+    border: none;
+    cursor: pointer;
+    font-size: 14px;
+    color: var(--text-color-light);
+    padding: 0;
+    line-height: 1;
+    font-family: var(--font-family);
+}
+
+.delete-btn:hover { color: var(--primary-color); }
+
+.find-sender-link {
+    display: inline-block;
+    padding: 10px 15px;
+    border-radius: 5px;
+    color: var(--text-color);
+    text-decoration: none;
+    cursor: pointer;
+    transition: background-color 0.3s ease;
+    border: 1px solid var(--border-color);
+    font-size: 14px;
+    font-family: var(--font-family);
+}
+
+.find-sender-link:hover { background-color: var(--button-background); }
+
+/* ===== Import/Export Section ===== */
+.share-details {
+    margin: 20px 0;
+    border: 1px solid var(--border-color);
+    border-radius: 5px;
+    padding: 15px;
+    background-color: var(--modal-background-export);
+}
+
+.share-details h3 {
+    font-weight: bold;
+    color: var(--text-color);
+    margin-top: 0;
+    margin-bottom: 15px;
+    font-family: var(--font-family);
+}
+
+.share-content { display: flex; flex-direction: column; gap: 15px; }
+.share-section { margin-bottom: 10px; }
+.share-section h4 { margin: 0 0 8px 0; font-size: 14px; color: var(--text-color); font-family: var(--font-family); }
+
+.input-group {
+    display: flex;
+    gap: 8px;
+    align-items: center;
+    color: var(--text-color-lighter);
+}
+
+.input-group input {
+    flex: 1;
+    padding: 8px;
+    border: 1px solid var(--border-color);
+    border-radius: 4px;
+    font-family: monospace;
+    font-size: 12px;
+}
+
+.input-group button {
+    padding: 8px 12px;
+    background-color: var(--button-background);
+    border: 1px solid var(--border-color);
+    border-radius: 4px;
+    cursor: pointer;
+    white-space: nowrap;
+    transition: background-color 0.2s ease;
+    font-family: var(--font-family);
+}
+
+.input-group button:hover { background-color: var(--button-hover); }
+
+#export-string-field, #import-string-field {
+    font-family: monospace;
+    font-size: 12px;
+    min-height: 36px;
+}
+
+/* Benutzerdefiniertes Modal für Meldungen */
+.custom-modal {
+    position: fixed;
+    top: 0; left: 0;
+    width: 100%; height: 100%;
+    background-color: rgba(0, 0, 0, 0.5);
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    z-index: 3000;
+}
+
+.custom-modal-content {
+    background-color: var(--modal-background);
+    padding: 20px;
+    border-radius: 10px;
+    box-shadow: var(--modal-shadow);
+    text-align: center;
+    max-width: 400px;
+    width: 90%;
+    font-family: var(--font-family);
+}
+
+.custom-modal-buttons {
+    display: flex;
+    justify-content: center;
+    gap: 10px;
+    margin-top: 20px;
+}
+
+.custom-modal-buttons button {
+    padding: 8px 15px;
+    border: none;
+    border-radius: 5px;
+    cursor: pointer;
+    transition: background-color 0.3s ease;
+    font-family: var(--font-family);
+}
\ No newline at end of file