diff --git a/frontend/src/style.css b/frontend/src/style.css
index ca086b3..83fc390 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -5,24 +5,16 @@
   color: #f5f5f5;
 }
 
-* {
-  box-sizing: border-box;
-}
+* { box-sizing: border-box; }
 
 body {
   margin: 0;
   min-height: 100vh;
-  background: #090909;
+  background: radial-gradient(circle at top left, #15332d 0, #090909 32rem);
 }
 
-button,
-textarea {
-  font: inherit;
-}
-
-button {
-  cursor: pointer;
-}
+button, textarea, input { font: inherit; }
+button { cursor: pointer; }
 
 .loading {
   min-height: 100vh;
@@ -40,7 +32,7 @@ button {
 .sidebar {
   min-height: 100vh;
   border-right: 1px solid #222;
-  background: #0d0d0d;
+  background: rgba(13, 13, 13, 0.94);
   padding: 28px;
   display: grid;
   align-content: start;
@@ -51,89 +43,31 @@ button {
   margin: 0 0 10px;
   color: #8bd8c6;
   font-size: 12px;
-  letter-spacing: 0;
   text-transform: uppercase;
 }
 
-h1,
-h2,
-h3,
-p {
-  margin-top: 0;
-}
+h1, h2, h3, p { margin-top: 0; }
 
 h1 {
   margin-bottom: 10px;
-  font-size: clamp(32px, 5vw, 56px);
+  font-size: clamp(32px, 5vw, 52px);
   line-height: 0.95;
-  letter-spacing: 0;
 }
 
-h2 {
-  margin-bottom: 0;
-  font-size: 30px;
-  letter-spacing: 0;
-}
+h2 { margin-bottom: 0; font-size: 30px; }
+h3 { margin-bottom: 12px; color: #d7d7d7; font-size: 14px; }
+.agent-meta { margin-bottom: 0; color: #a6a6a6; overflow-wrap: anywhere; }
 
-h3 {
-  margin-bottom: 12px;
-  color: #d7d7d7;
-  font-size: 14px;
-  letter-spacing: 0;
-}
-
-.agent-meta {
-  margin-bottom: 0;
-  color: #a6a6a6;
-}
-
-.skill-list {
-  display: grid;
-  gap: 10px;
-}
-
-.skill {
-  width: 100%;
-  min-height: 58px;
+.session, .tips, .panel, .error-card {
   border: 1px solid #252525;
-  border-radius: 8px;
-  background: #121212;
-  color: #f3f3f3;
-  padding: 12px 14px;
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 16px;
-  text-align: left;
+  border-radius: 12px;
+  background: #0d0d0d;
 }
 
-.skill:hover,
-.skill.active {
-  border-color: #5bb7a7;
-  background: #15201d;
-}
-
-.skill span {
-  overflow-wrap: anywhere;
-}
-
-.skill small {
-  color: #9d9d9d;
-}
-
-.session {
-  border: 1px solid #252525;
-  border-radius: 8px;
-  padding: 14px;
-  color: #a6a6a6;
-  display: grid;
-  gap: 4px;
-}
-
-.session strong {
-  color: #f3f3f3;
-  overflow-wrap: anywhere;
-}
+.session { padding: 14px; color: #a6a6a6; display: grid; gap: 4px; }
+.session strong { color: #f3f3f3; overflow-wrap: anywhere; }
+.tips { padding: 16px; color: #cfcfcf; }
+.tips ul { margin: 0; padding-left: 18px; display: grid; gap: 10px; }
 
 .workbench {
   padding: 28px;
@@ -149,10 +83,9 @@ h3 {
   gap: 18px;
 }
 
-.toolbar a,
-.runner button {
+.toolbar a, .runner button {
   border: 1px solid #e8e8e8;
-  border-radius: 7px;
+  border-radius: 9px;
   background: #f4f4f4;
   color: #111;
   padding: 10px 14px;
@@ -160,55 +93,38 @@ h3 {
   white-space: nowrap;
 }
 
-.runner {
-  display: grid;
-  gap: 12px;
-}
+.runner { display: grid; gap: 14px; }
+.runner label { display: grid; gap: 8px; color: #d7d7d7; }
 
-.runner label {
-  display: grid;
-  gap: 10px;
-  color: #d7d7d7;
-}
-
-.runner textarea {
+.runner textarea, .runner input {
   width: 100%;
-  min-height: 170px;
-  resize: vertical;
   border: 1px solid #252525;
-  border-radius: 8px;
+  border-radius: 10px;
   background: #070707;
   color: #eeeeee;
   padding: 14px;
   line-height: 1.5;
-  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
 }
 
-.runner button {
-  justify-self: start;
-}
+.runner textarea { min-height: 170px; resize: vertical; }
+.message-box { font-family: inherit; }
+.runner button { justify-self: start; }
+.runner button:disabled { cursor: wait; opacity: 0.72; }
+.grid-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
+.error-card { padding: 14px; color: #ffd7d7; border-color: #6d2a2a; }
 
-.runner button:disabled {
-  cursor: wait;
-  opacity: 0.72;
-}
-
-.panels {
-  display: grid;
-  grid-template-columns: repeat(2, minmax(0, 1fr));
-  gap: 16px;
-}
-
-.panel {
-  min-width: 0;
-  border: 1px solid #252525;
-  border-radius: 8px;
-  padding: 16px;
-  background: #0d0d0d;
-}
+.panels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
+.result-panels { align-items: start; }
+.panel { min-width: 0; padding: 16px; }
+.result-card p { color: #eeeeee; line-height: 1.55; }
+.pill { display: inline-flex; border: 1px solid #5bb7a7; border-radius: 999px; padding: 6px 10px; color: #bff5ea; }
+.clean-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
+.clean-list li { display: grid; gap: 4px; padding-bottom: 12px; border-bottom: 1px solid #202020; }
+.clean-list li:last-child { border-bottom: 0; padding-bottom: 0; }
+.clean-list small { color: #aaa; }
 
 pre {
-  min-height: 260px;
+  min-height: 220px;
   max-height: 420px;
   margin: 0;
   overflow: auto;
@@ -218,27 +134,9 @@ pre {
   font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
 }
 
-.empty {
-  color: #aaa;
-}
-
 @media (max-width: 820px) {
-  .app-shell {
-    grid-template-columns: 1fr;
-  }
-
-  .sidebar {
-    min-height: auto;
-    border-right: 0;
-    border-bottom: 1px solid #222;
-  }
-
-  .panels {
-    grid-template-columns: 1fr;
-  }
-
-  .toolbar {
-    align-items: flex-start;
-    flex-direction: column;
-  }
+  .app-shell { grid-template-columns: 1fr; }
+  .sidebar { min-height: auto; border-right: 0; border-bottom: 1px solid #222; }
+  .panels, .grid-fields { grid-template-columns: 1fr; }
+  .toolbar { align-items: flex-start; flex-direction: column; }
 }