fix: improve accessibility and styling for vehicle selection and review buttons

frontend/index.html

@@ -251,8 +251,8 @@
                             <h3 class="bpf-panel-title">🚗 <span data-i18n="stepVehicleTime">Fahrzeug & Zeitraum</span></h3>
 
                             <div class="bpf-field">
-                                <label data-i18n="bpfVehicle">Fahrzeug</label>
-                                <select id="bpfCar">
+                                <label for="bpfCar" id="bpfCarLabel" data-i18n="bpfVehicle">Fahrzeug</label>
+                                <select id="bpfCar" aria-labelledby="bpfCarLabel">
                                     <option value="" data-i18n="bpfSelectVehicle">Fahrzeug wählen</option>
                                 </select>
                             </div>

frontend/styles.css

@@ -562,12 +562,32 @@ select:focus, input:focus, textarea:focus {
 }
 
 .review-dots button {
-    width: 10px; height: 10px; border-radius: 50%;
-    border: none; background: var(--line); cursor: pointer;
-    transition: background 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s ease, width 0.3s ease;
+    width: 44px;
+    height: 44px;
+    padding: 0;
+    border: none;
+    background: transparent;
+    cursor: pointer;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
     outline-offset: 4px;
 }
+
+.review-dots button::before {
+    content: "";
+    width: 10px;
+    height: 10px;
+    border-radius: 50%;
+    background: var(--line);
+    transition: background 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s ease, width 0.3s ease, border-radius 0.3s ease;
+}
+
 .review-dots button:hover {
+    transform: scale(1.04);
+}
+
+.review-dots button:hover::before {
     background: rgba(196, 138, 66, 0.5);
     transform: scale(1.2);
 }
@@ -575,10 +595,13 @@ select:focus, input:focus, textarea:focus {
     outline: 2px solid var(--accent);
 }
 .review-dots button.active { 
+    transform: scale(1);
+}
+
+.review-dots button.active::before {
     background: var(--accent);
     width: 32px;
     border-radius: 6px;
-    transform: scale(1);
 }
 
 /* ---------------- Booking ---------------- */