diff --git a/experiment/simulation/index.html b/experiment/simulation/index.html
index ece8f11..db70e65 100644
--- a/experiment/simulation/index.html
+++ b/experiment/simulation/index.html
@@ -11,15 +11,22 @@
         <div class="row">
           <!-- Left: Problem, code, compile/run, output -->
           <div class="col-lg-8 col-md-7 col-12 mb-3">
-            <div class="form-group mb-3">
-              <label for="problem-select"
-                ><strong>Select Problem:</strong></label
-              >
-              <select class="form-control" id="problem-select"></select>
+            <div class="form-group mb-3" style="margin-bottom: 2rem">
+              <label for="problem-select" style="margin-bottom: 0.5rem">
+                <strong>Select Problem:</strong>
+              </label>
+              <select
+                class="form-control"
+                id="problem-select"
+                style="max-width: 220px"
+              ></select>
             </div>
             <div id="problem-desc" class="problem-statement mb-3"></div>
             <div id="code-template" class="code-area mb-3"></div>
-            <div class="d-flex flex-wrap gap-2 mb-2">
+            <div
+              class="d-flex flex-wrap gap-2 mb-2"
+              style="margin-bottom: 1.5rem"
+            >
               <button id="submit-btn" class="btn btn-primary mr-2">
                 Compile
               </button>