diff --git a/frontend/src/style.css b/frontend/src/style.css
index 8e72ffe..ca086b3 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -1,66 +1,244 @@
 :root {
-  color-scheme: light;
+  color-scheme: dark;
   font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
-  background: #f5f1ea;
-  color: #1b1b1b;
+  background: #090909;
+  color: #f5f5f5;
 }
 
-* { box-sizing: border-box; }
-body { margin: 0; min-height: 100vh; background: #f5f1ea; }
-button, input, textarea { font: inherit; }
-button { cursor: pointer; }
-
-.loading { min-height: 100vh; display: grid; place-items: center; color: #6f665b; }
-.app-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 32px 0 48px; }
-.hero { display: grid; grid-template-columns: 1fr minmax(240px, 320px); gap: 24px; align-items: end; margin-bottom: 24px; }
-.eyebrow { margin: 0 0 8px; color: #9a4f18; text-transform: uppercase; letter-spacing: .08em; font-size: 12px; font-weight: 800; }
-h1, h2, p { margin-top: 0; }
-h1 { max-width: 850px; font-size: clamp(38px, 6vw, 72px); line-height: .92; letter-spacing: -0.06em; margin-bottom: 18px; }
-h2 { margin-bottom: 0; font-size: 24px; letter-spacing: -0.03em; }
-.lede { max-width: 760px; color: #5f574f; font-size: 18px; line-height: 1.55; margin-bottom: 0; }
-
-.card { background: #fffdf9; border: 1px solid #e1d5c5; border-radius: 22px; box-shadow: 0 20px 60px rgba(73, 50, 23, .08); padding: 22px; }
-.session-card { background: #1d2a24; color: #fff; border-radius: 20px; padding: 20px; display: grid; gap: 8px; }
-.session-card span { color: #b9d8ca; }
-.session-card strong { overflow-wrap: anywhere; }
-.grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); gap: 20px; align-items: start; }
-.card-title { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 18px; }
-.button { border: 0; border-radius: 999px; background: #cf6d21; color: #fff; padding: 11px 16px; font-weight: 800; text-decoration: none; display: inline-flex; justify-content: center; align-items: center; }
-.button.secondary { background: #f0e5d8; color: #3a2a1d; }
-.button:disabled { opacity: .55; cursor: not-allowed; }
-
-.workflow { display: grid; gap: 16px; }
-label { display: grid; gap: 8px; color: #3d352d; font-weight: 750; }
-input, textarea { width: 100%; border: 1px solid #d9cbbb; border-radius: 14px; background: #fffaf4; color: #1b1b1b; padding: 12px 13px; }
-textarea { min-height: 260px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 13px; line-height: 1.5; }
-.weights { border: 1px solid #eadfce; border-radius: 16px; padding: 14px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
-.weights legend { padding: 0 8px; color: #7a4a24; font-weight: 800; }
-.help, .empty, .upload-box small { color: #70665b; line-height: 1.45; }
-.upload-box { border: 1px dashed #d7b98d; background: #fff7ec; border-radius: 16px; padding: 16px; display: grid; gap: 8px; }
-.notice { border-left: 4px solid #cf6d21; background: #fff4e7; border-radius: 10px; padding: 12px; color: #563615; }
-.error { border-left: 4px solid #b42318; background: #fff0ee; border-radius: 10px; padding: 12px; color: #8a1f15; }
-
-.history ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
-.history li button { width: 100%; text-align: left; border: 1px solid #eadfce; background: #fffaf4; border-radius: 16px; padding: 13px; display: grid; gap: 5px; }
-.history li button:hover { border-color: #cf6d21; }
-.history span { color: #70665b; }
-
-.result { margin-top: 20px; display: grid; gap: 18px; }
-.recommendation { border-radius: 18px; padding: 20px; background: linear-gradient(135deg, #1d2a24, #305341); color: #fff; }
-.recommendation .eyebrow { color: #b9f2d2; }
-.recommendation h2 { font-size: clamp(28px, 5vw, 48px); margin-bottom: 8px; }
-.recommendation p { color: #e0f2e9; line-height: 1.5; }
-.recommendation small { color: #b9d8ca; }
-.table-wrap { overflow-x: auto; }
-table { width: 100%; border-collapse: collapse; min-width: 720px; }
-th, td { padding: 12px; border-bottom: 1px solid #eadfce; text-align: left; }
-th { color: #75502f; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
-.error-state { border-color: #f1a19a; }
-pre { max-height: 260px; overflow: auto; background: #2a211b; color: #fff3e6; border-radius: 14px; padding: 14px; }
-
-@media (max-width: 860px) {
-  .hero, .grid { grid-template-columns: 1fr; }
-  .weights { grid-template-columns: 1fr; }
-  .card-title { align-items: flex-start; flex-direction: column; }
-  .button { width: 100%; }
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  min-height: 100vh;
+  background: #090909;
+}
+
+button,
+textarea {
+  font: inherit;
+}
+
+button {
+  cursor: pointer;
+}
+
+.loading {
+  min-height: 100vh;
+  display: grid;
+  place-items: center;
+  color: #b8b8b8;
+}
+
+.app-shell {
+  min-height: 100vh;
+  display: grid;
+  grid-template-columns: minmax(260px, 340px) 1fr;
+}
+
+.sidebar {
+  min-height: 100vh;
+  border-right: 1px solid #222;
+  background: #0d0d0d;
+  padding: 28px;
+  display: grid;
+  align-content: start;
+  gap: 28px;
+}
+
+.eyebrow {
+  margin: 0 0 10px;
+  color: #8bd8c6;
+  font-size: 12px;
+  letter-spacing: 0;
+  text-transform: uppercase;
+}
+
+h1,
+h2,
+h3,
+p {
+  margin-top: 0;
+}
+
+h1 {
+  margin-bottom: 10px;
+  font-size: clamp(32px, 5vw, 56px);
+  line-height: 0.95;
+  letter-spacing: 0;
+}
+
+h2 {
+  margin-bottom: 0;
+  font-size: 30px;
+  letter-spacing: 0;
+}
+
+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;
+  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;
+}
+
+.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;
+}
+
+.workbench {
+  padding: 28px;
+  display: grid;
+  align-content: start;
+  gap: 22px;
+}
+
+.toolbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 18px;
+}
+
+.toolbar a,
+.runner button {
+  border: 1px solid #e8e8e8;
+  border-radius: 7px;
+  background: #f4f4f4;
+  color: #111;
+  padding: 10px 14px;
+  text-decoration: none;
+  white-space: nowrap;
+}
+
+.runner {
+  display: grid;
+  gap: 12px;
+}
+
+.runner label {
+  display: grid;
+  gap: 10px;
+  color: #d7d7d7;
+}
+
+.runner textarea {
+  width: 100%;
+  min-height: 170px;
+  resize: vertical;
+  border: 1px solid #252525;
+  border-radius: 8px;
+  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 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;
+}
+
+pre {
+  min-height: 260px;
+  max-height: 420px;
+  margin: 0;
+  overflow: auto;
+  color: #dcdcdc;
+  line-height: 1.5;
+  font-size: 13px;
+  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;
+  }
 }