diff --git a/frontend/src/style.css b/frontend/src/style.css
index 9232381..ca086b3 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -1,64 +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: #f5f2ea;
-  color: #17201b;
+  background: #090909;
+  color: #f5f5f5;
 }
 
-* { box-sizing: border-box; }
-body { margin: 0; min-height: 100vh; background: radial-gradient(circle at top left, #fff7dc 0, #f5f2ea 36%, #edf5f0 100%); }
-button, input { font: inherit; }
-button { cursor: pointer; }
-button:disabled { cursor: not-allowed; opacity: 0.55; }
-.loading { min-height: 100vh; display: grid; place-items: center; color: #56645d; }
-.product-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 42px; display: grid; gap: 22px; }
-.hero { display: grid; grid-template-columns: 1fr minmax(260px, 360px); gap: 22px; align-items: stretch; }
-.eyebrow { margin: 0 0 8px; color: #0b7f68; font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
-h1, h2, p { margin-top: 0; }
-h1 { max-width: 820px; margin-bottom: 14px; font-size: clamp(38px, 7vw, 72px); line-height: .94; letter-spacing: -.055em; }
-h2 { margin-bottom: 0; font-size: 25px; letter-spacing: -.03em; }
-.lede { max-width: 760px; color: #48564f; font-size: 18px; line-height: 1.55; }
-.session-card, .panel { border: 1px solid rgba(23,32,27,.12); border-radius: 22px; background: rgba(255,255,255,.76); box-shadow: 0 20px 70px rgba(28,44,36,.08); backdrop-filter: blur(12px); }
-.session-card { padding: 22px; display: grid; align-content: start; gap: 8px; }
-.session-card span { color: #65736c; }
-.session-card strong { font-size: 20px; overflow-wrap: anywhere; }
-.session-card a, .actions button, .section-title button, .upload-box button, .quote-row button { border: 0; border-radius: 999px; background: #17201b; color: #fff; padding: 10px 15px; text-decoration: none; text-align: center; }
-.session-card small { color: #69756f; line-height: 1.4; }
-.studio { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(280px, .75fr); gap: 22px; align-items: start; }
-.panel { padding: 22px; }
-.section-title { display: flex; justify-content: space-between; gap: 16px; align-items: center; margin-bottom: 18px; }
-.section-title button, .upload-box button, .quote-row button { background: #e5efe9; color: #163d32; }
-.field, .upload-box label, .slider { display: grid; gap: 8px; color: #35443d; font-weight: 700; }
-.field input, .quote-row input { width: 100%; border: 1px solid #cfd9d3; border-radius: 12px; background: #fff; color: #17201b; padding: 11px 12px; }
-.upload-box { margin: 16px 0; display: flex; align-items: end; justify-content: space-between; gap: 14px; padding: 14px; border: 1px dashed #a9bab1; border-radius: 16px; background: #f9fbf8; }
-.upload-box input { max-width: 100%; }
-.quotes-table { display: grid; gap: 8px; overflow-x: auto; }
-.quote-row { min-width: 860px; display: grid; grid-template-columns: 1.45fr .85fr .65fr .85fr .95fr auto; gap: 8px; align-items: center; }
-.quote-row.header { color: #5e6c65; font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; }
-.quote-row button { padding: 9px 12px; }
-.weights { position: sticky; top: 18px; display: grid; gap: 18px; }
-.slider { grid-template-columns: 84px 1fr 42px; align-items: center; text-transform: capitalize; }
-.slider input { accent-color: #0b7f68; width: 100%; }
-.slider output { text-align: right; font-variant-numeric: tabular-nums; }
-.actions { display: flex; flex-wrap: wrap; gap: 10px; }
-.actions button { background: #0b7f68; }
-.actions button + button { background: #17201b; }
-.notice { margin: 0; color: #56645d; line-height: 1.45; }
-.error { margin: 0; border-radius: 14px; background: #fff0ed; color: #9d2412; padding: 12px 14px; line-height: 1.45; }
-.result-panel { display: grid; gap: 16px; }
-.pill { border-radius: 999px; background: #e7f6ef; color: #08785f; padding: 7px 10px; font-size: 13px; font-weight: 800; }
-.result-grid { display: grid; gap: 18px; }
-.winner-card { border-radius: 18px; background: linear-gradient(135deg, #0b7f68, #12241e); color: #fff; padding: 20px; display: grid; gap: 8px; }
-.winner-card strong { font-size: 30px; letter-spacing: -.04em; }
-.winner-card span { color: #b8f1e1; font-weight: 800; }
-.winner-card p { margin: 0; line-height: 1.5; color: #eefaf6; }
-.scores { display: grid; gap: 10px; }
-.scorebar { display: grid; grid-template-columns: minmax(120px, 220px) 1fr 54px; gap: 10px; align-items: center; }
-.scorebar span, .scorebar b { font-size: 14px; }
-.scorebar div { height: 12px; overflow: hidden; border-radius: 999px; background: #e3ebe6; }
-.scorebar i { display: block; height: 100%; border-radius: 999px; background: #0b7f68; }
-table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: 16px; background: #fff; }
-th, td { padding: 12px; border-bottom: 1px solid #edf1ee; text-align: left; }
-th { color: #5b6a63; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
-.receipt, .empty { margin: 0; color: #5c6c65; }
-@media (max-width: 900px) { .hero, .studio { grid-template-columns: 1fr; } .weights { position: static; } h1 { font-size: clamp(34px, 12vw, 56px); } }
+* {
+  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;
+  }
+}