.du-root {
  --du-bg: var(--color-background, #0d1210);
  --du-panel: var(--color-card, #151b18);
  --du-panel-soft: color-mix(in srgb, var(--color-card, #151b18) 70%, var(--color-background, #0d1210));
  --du-border: var(--color-border, rgba(238, 244, 238, 0.12));
  --du-border-strong: color-mix(in srgb, var(--color-primary, #d0f2d8) 36%, var(--color-border, rgba(238,244,238,0.12)));
  --du-fg: var(--color-foreground, #eef4ee);
  --du-muted: var(--color-muted-foreground, #9eb5a6);
  --du-accent: var(--color-primary, #d0f2d8);
  --du-accent-strong: color-mix(in srgb, var(--color-primary, #d0f2d8) 80%, white);
  --du-danger: var(--color-destructive, #e06868);
  --du-warning: var(--color-warning, #d6c674);
  --du-winner: color-mix(in srgb, var(--color-primary, #d0f2d8) 65%, transparent);
  --du-a: #7eb88f;
  --du-b: #9ec1f5;

  background: var(--du-bg);
  color: var(--du-fg);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 57px);
}

.du-banner {
  align-items: center;
  border-bottom: 1px solid var(--du-border);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding: 8px 16px;
}
.du-banner-error { background: color-mix(in srgb, var(--du-danger) 14%, var(--du-bg)); color: var(--du-danger); }
.du-banner-close { background: transparent; border: 0; color: inherit; cursor: pointer; font-size: 18px; padding: 0 6px; }

.du-grid {
  display: grid;
  flex: 1;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  min-height: 0;
}

.du-sidebar {
  background: var(--du-panel-soft);
  border-right: 1px solid var(--du-border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.du-sidebar-head {
  border-bottom: 1px solid var(--du-border);
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, 1fr) auto;
  padding: 10px 12px;
}

.du-search {
  background: var(--du-bg);
  border: 1px solid var(--du-border);
  border-radius: 6px;
  color: var(--du-fg);
  font-size: 13px;
  padding: 6px 10px;
}
.du-search:focus { border-color: var(--du-border-strong); outline: none; }

.du-rows { display: flex; flex-direction: column; overflow-y: auto; padding: 6px; }

.du-row {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  color: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  text-align: left;
}
.du-row + .du-row { margin-top: 2px; }
.du-row:hover { background: color-mix(in srgb, var(--du-accent) 8%, transparent); }
.du-row-active {
  background: color-mix(in srgb, var(--du-accent) 18%, transparent);
  border-color: var(--du-border-strong);
}

.du-row-head { align-items: baseline; display: flex; gap: 8px; }
.du-row-prompt { flex: 1; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.du-row-time { color: var(--du-muted); font-size: 11px; }

.du-row-models { color: var(--du-muted); display: flex; font-size: 11px; gap: 6px; }
.du-row-model { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.du-row-vs { color: var(--du-accent); font-weight: 700; }

.du-row-tags { display: flex; flex-wrap: wrap; gap: 4px; }

.du-sidebar-foot {
  border-top: 1px solid var(--du-border);
  color: var(--du-muted);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 8px 12px;
  text-transform: uppercase;
}

.du-stats {
  border-top: 1px solid var(--du-border);
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
}
.du-stats-title {
  color: var(--du-muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
  text-transform: uppercase;
}
.du-stats-row {
  align-items: baseline;
  color: var(--du-muted);
  display: grid;
  font-size: 11px;
  gap: 6px;
  grid-template-columns: 18px minmax(0, 1fr) 28px 36px;
}
.du-stats-rank { color: var(--du-fg); font-weight: 600; }
.du-stats-model { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.du-stats-wins { color: var(--du-accent); font-weight: 600; text-align: right; }
.du-stats-rate { color: var(--du-warning); text-align: right; }

.du-empty { color: var(--du-muted); font-size: 13px; padding: 24px 16px; text-align: center; }

.du-verdict-pill {
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 1px 6px;
}
.du-verdict-a { color: var(--du-a); }
.du-verdict-b { color: var(--du-b); }
.du-verdict-tie { color: var(--du-warning); }
.du-verdict-unrated { color: var(--du-muted); }

.du-composer { background: var(--du-bg); display: flex; flex-direction: column; min-height: 0; overflow-y: auto; }
.du-composer-empty { align-items: center; color: var(--du-muted); display: flex; flex: 1; font-size: 14px; justify-content: center; text-align: center; }

.du-composer-bar {
  align-items: center;
  background: var(--du-panel);
  border-bottom: 1px solid var(--du-border);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding: 10px 16px;
}
.du-composer-title { color: var(--du-muted); font-size: 12px; letter-spacing: 0.04em; }
.du-composer-actions { display: flex; gap: 8px; }

.du-prompt-wrap { display: flex; flex-direction: column; gap: 6px; padding: 14px 16px 0; }
.du-prompt-label { color: var(--du-muted); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; }
.du-prompt-textarea {
  background: var(--du-panel-soft);
  border: 1px solid var(--du-border);
  border-radius: 6px;
  color: var(--du-fg);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  min-height: 90px;
  padding: 10px 12px;
  resize: vertical;
}
.du-prompt-textarea:focus { border-color: var(--du-border-strong); outline: none; }

.du-arena {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
  padding: 14px 16px 0;
}

.du-response {
  background: var(--du-panel-soft);
  border: 1px solid var(--du-border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 12px 12px;
}

.du-response-a { border-left: 3px solid var(--du-a); }
.du-response-b { border-left: 3px solid var(--du-b); }
.du-response-winner {
  background: color-mix(in srgb, var(--du-accent) 8%, var(--du-panel-soft));
  border-color: var(--du-winner);
  box-shadow: 0 0 0 1px var(--du-winner);
}

.du-response-head { align-items: center; display: flex; gap: 10px; }
.du-response-label {
  background: color-mix(in srgb, var(--du-accent) 16%, transparent);
  border-radius: 999px;
  color: var(--du-accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 2px 9px;
}

.du-model-select {
  background: var(--du-bg);
  border: 1px solid var(--du-border);
  border-radius: 4px;
  color: var(--du-fg);
  flex: 1;
  font-size: 12px;
  padding: 5px 8px;
}
.du-model-select:focus { border-color: var(--du-border-strong); outline: none; }

.du-response-textarea {
  background: var(--du-bg);
  border: 1px solid var(--du-border);
  border-radius: 4px;
  color: var(--du-fg);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.55;
  min-height: 200px;
  padding: 10px 12px;
  resize: vertical;
}
.du-response-textarea:focus { border-color: var(--du-border-strong); outline: none; }

.du-verdict-btn {
  background: var(--du-panel);
  color: var(--du-muted);
}
.du-verdict-btn-active {
  background: color-mix(in srgb, var(--du-accent) 24%, transparent);
  border-color: var(--du-accent);
  color: var(--du-accent);
}

.du-notes-wrap { display: flex; flex-direction: column; gap: 6px; padding: 14px 16px 0; }
.du-notes-label { color: var(--du-muted); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; }
.du-notes-textarea {
  background: var(--du-panel-soft);
  border: 1px solid var(--du-border);
  border-radius: 6px;
  color: var(--du-fg);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.55;
  min-height: 80px;
  padding: 10px 12px;
  resize: vertical;
}
.du-notes-textarea:focus { border-color: var(--du-border-strong); outline: none; }

.du-tags-row {
  align-items: center;
  display: grid;
  gap: 12px;
  grid-template-columns: auto minmax(220px, 380px);
  padding: 14px 16px 18px;
}
.du-tags-label { color: var(--du-muted); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; }
.du-tags-input {
  background: var(--du-panel-soft);
  border: 1px solid var(--du-border);
  border-radius: 6px;
  color: var(--du-fg);
  font-size: 12px;
  padding: 5px 10px;
}
.du-tags-input:focus { border-color: var(--du-border-strong); outline: none; }

.du-tag {
  background: color-mix(in srgb, var(--du-accent) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--du-accent) 38%, transparent);
  border-radius: 999px;
  color: var(--du-accent);
  font-size: 11px;
  padding: 2px 8px;
}
.du-tag-mini { font-size: 10px; padding: 1px 6px; }

.du-btn {
  background: var(--du-panel-soft);
  border: 1px solid var(--du-border);
  border-radius: 6px;
  color: var(--du-fg);
  cursor: pointer;
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  text-transform: uppercase;
}
.du-btn:hover:not(:disabled) { border-color: var(--du-border-strong); }
.du-btn:disabled { cursor: not-allowed; opacity: 0.55; }
.du-btn-primary { background: var(--du-accent); border-color: var(--du-accent); color: var(--du-bg); font-weight: 600; }
.du-btn-primary:hover:not(:disabled) { background: var(--du-accent-strong); }
.du-btn-ghost { background: transparent; }
.du-btn-danger { color: var(--du-danger); }
.du-btn-danger:hover:not(:disabled) {
  background: color-mix(in srgb, var(--du-danger) 14%, transparent);
  border-color: var(--du-danger);
}