diff --git a/frontend/src/style.css b/frontend/src/style.css
index ef6228b..ca086b3 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -1,59 +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: #f5f2eb;
-  color: #171717;
+  background: #090909;
+  color: #f5f5f5;
 }
 
-* { box-sizing: border-box; }
-body { margin: 0; min-height: 100vh; background: linear-gradient(135deg, #f7f2e8 0%, #eef7f4 100%); }
-button, input { font: inherit; }
-button { cursor: pointer; border: 0; border-radius: 12px; padding: 10px 14px; background: #10231f; color: #fff; font-weight: 700; }
-button:disabled { cursor: not-allowed; opacity: 0.55; }
-input { border: 1px solid #d8d3c8; border-radius: 10px; padding: 10px 12px; background: #fff; color: #151515; width: 100%; }
-label { display: grid; gap: 7px; color: #3f4744; font-weight: 650; }
-.loading { min-height: 100vh; display: grid; place-items: center; color: #52615c; }
-.studio-shell { width: min(1220px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 44px; }
-.hero { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 24px; align-items: end; margin-bottom: 20px; }
-.eyebrow { margin: 0 0 8px; color: #167360; font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; }
-h1, h2, h3, p { margin-top: 0; }
-h1 { max-width: 780px; margin-bottom: 12px; font-size: clamp(38px, 7vw, 76px); line-height: 0.92; letter-spacing: -0.06em; }
-h2 { margin-bottom: 0; font-size: 28px; letter-spacing: -0.03em; }
-h3 { margin-bottom: 10px; font-size: 28px; letter-spacing: -0.04em; }
-.lede { max-width: 760px; margin-bottom: 0; color: #52615c; font-size: 18px; line-height: 1.55; }
-.session-card, .notice, .card { border: 1px solid rgba(16, 35, 31, 0.13); box-shadow: 0 24px 60px rgba(20, 31, 28, 0.08); background: rgba(255, 255, 255, 0.78); backdrop-filter: blur(14px); border-radius: 24px; }
-.session-card { padding: 18px; display: grid; gap: 6px; }
-.session-card span { color: #65736f; }
-.session-card strong { overflow-wrap: anywhere; }
-.session-card a { margin-top: 8px; color: #10231f; font-weight: 800; }
-.notice { min-height: 54px; padding: 14px 18px; margin-bottom: 18px; display: flex; gap: 12px; align-items: center; justify-content: space-between; color: #40504b; }
-.notice strong { color: #9b1c1c; }
-.grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(360px, 0.65fr); gap: 18px; align-items: start; }
-.card { padding: 22px; }
-.workflow { display: grid; gap: 18px; }
-.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
-.section-heading button, .subtle { background: #e6eee9; color: #10231f; }
-.weights { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
-.quotes { display: grid; gap: 12px; }
-fieldset { margin: 0; border: 1px solid #ddd8ce; border-radius: 18px; padding: 16px; display: grid; grid-template-columns: 1.4fr repeat(4, 1fr) auto; gap: 12px; align-items: end; background: #fffaf1; }
-legend { padding: 0 8px; color: #167360; font-weight: 850; }
-.button-row, .reopen-row { display: flex; gap: 10px; align-items: center; }
-.button-row { justify-content: flex-end; }
-.upload-box { border: 1px dashed #95aaa4; border-radius: 18px; padding: 16px; background: #f6fbf8; }
-.upload-box input { border: 0; padding: 4px 0; background: transparent; }
-.upload-box small { color: #167360; }
-.result-card { display: grid; gap: 18px; position: sticky; top: 18px; }
-.recommendation { display: grid; gap: 12px; }
-.recommendation h3 { color: #11624f; }
-dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0; }
-dl div { border-radius: 16px; padding: 12px; background: #f3f7f5; }
-dt { color: #687671; font-size: 12px; text-transform: uppercase; font-weight: 800; }
-dd { margin: 4px 0 0; font-size: 18px; font-weight: 850; overflow-wrap: anywhere; }
-table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: 16px; background: #fff; font-size: 14px; }
-th, td { padding: 10px; border-bottom: 1px solid #ece7dc; text-align: left; }
-th { color: #52615c; font-size: 12px; text-transform: uppercase; }
-.empty-state { border: 1px dashed #c7beb0; border-radius: 18px; padding: 18px; color: #52615c; background: #fffaf3; }
-.empty-state h3 { color: #2b312f; }
-.empty-state small { color: #7f4b19; font-weight: 700; }
-@media (max-width: 980px) { .hero, .grid { grid-template-columns: 1fr; } .result-card { position: static; } fieldset { grid-template-columns: 1fr 1fr; } .weights { grid-template-columns: 1fr; } }
-@media (max-width: 620px) { .studio-shell { width: min(100% - 20px, 1220px); padding-top: 16px; } h1 { font-size: 42px; } fieldset { grid-template-columns: 1fr; } .button-row, .reopen-row, .notice { align-items: stretch; flex-direction: column; } dl { grid-template-columns: 1fr; } }
+* {
+  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;
+  }
+}