:root {
  --bg: #0e1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --pass: #3fb950;
  --fail: #f85149;
  --warn: #d29922;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}
header h1 { font-size: 15px; margin: 0; font-weight: 600; }
header .sub { color: var(--muted); font-size: 12px; font-family: var(--mono); }
header nav { margin-left: auto; display: flex; gap: 8px; }
header nav a {
  color: var(--muted); text-decoration: none; padding: 4px 10px; border-radius: 4px;
}
header nav a.active, header nav a:hover { color: var(--text); background: var(--panel-2); }

main { flex: 1; display: grid; grid-template-columns: 260px 1fr 340px; min-height: 0; }

/* sidebar: scenarios */
#sidebar { background: var(--panel); border-right: 1px solid var(--border); padding: 12px; overflow-y: auto; }
#sidebar h2 { font-size: 11px; text-transform: uppercase; color: var(--muted); margin: 12px 0 6px; letter-spacing: 0.08em; }
.scenario {
  display: block; width: 100%; text-align: left;
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 8px 10px; margin-bottom: 6px; cursor: pointer;
  font-size: 13px;
}
.scenario:hover { border-color: var(--accent); }
.scenario .desc { color: var(--muted); font-size: 11px; margin-top: 2px; }

/* chat/log */
#chat { display: flex; flex-direction: column; min-height: 0; }
#log { flex: 1; overflow-y: auto; padding: 16px; font-family: var(--mono); font-size: 13px; white-space: pre-wrap; word-break: break-word; }
#log .assistant { color: var(--text); }
#log .user { color: var(--accent); border-left: 2px solid var(--accent); padding-left: 10px; margin: 12px 0; }
#log .tool { color: var(--muted); font-size: 12px; margin: 4px 0; }
#log .tool.err { color: var(--fail); }
#log .tool.ok  { color: var(--pass); }
#log .sys { color: var(--warn); font-size: 12px; }

#composer { border-top: 1px solid var(--border); padding: 10px; display: flex; gap: 8px; background: var(--panel); }
#composer textarea {
  flex: 1; resize: none; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px;
  font: inherit; min-height: 44px; max-height: 140px;
}
#composer button {
  background: var(--accent); color: #0b1220; border: none; border-radius: 6px;
  padding: 0 16px; font-weight: 600; cursor: pointer;
}
#composer button.secondary { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
#composer button:disabled { opacity: 0.5; cursor: not-allowed; }

/* results panel */
#results { background: var(--panel); border-left: 1px solid var(--border); overflow-y: auto; padding: 12px; }
#results h2 { font-size: 11px; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; letter-spacing: 0.08em; }
#summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-bottom: 12px; }
#summary .cell { background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; text-align: center; }
#summary .cell .n { font-size: 18px; font-weight: 700; }
#summary .cell .l { font-size: 10px; color: var(--muted); text-transform: uppercase; }
#summary .cell.pass .n { color: var(--pass); }
#summary .cell.fail .n { color: var(--fail); }
#summary .cell.err .n  { color: var(--warn); }

.result { background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px; padding: 8px; margin-bottom: 6px; font-size: 12px; }
.result .name { font-weight: 600; }
.result .tool { color: var(--muted); font-family: var(--mono); font-size: 11px; }
.result.pass { border-left: 3px solid var(--pass); }
.result.fail { border-left: 3px solid var(--fail); }
.result.error { border-left: 3px solid var(--warn); }
.result details summary { cursor: pointer; color: var(--muted); margin-top: 4px; font-size: 11px; }
.result pre { background: #0b0f14; padding: 6px; border-radius: 4px; overflow-x: auto; font-size: 11px; max-height: 180px; }

.actions { display: flex; gap: 6px; margin-bottom: 10px; }
.actions button {
  flex: 1; background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px; cursor: pointer; font-size: 12px;
}
.actions button:hover { border-color: var(--accent); }

/* reports page */
#reports-layout { display: grid; grid-template-columns: 260px 1fr; flex: 1; min-height: 0; }
#reports-list { background: var(--panel); border-right: 1px solid var(--border); overflow-y: auto; padding: 12px; }
#reports-list a { display: block; padding: 8px; color: var(--text); text-decoration: none; border-radius: 4px; font-family: var(--mono); font-size: 12px; margin-bottom: 2px; }
#reports-list a:hover, #reports-list a.active { background: var(--panel-2); color: var(--accent); }
#report-view { padding: 24px 32px; overflow-y: auto; max-width: 900px; }
#report-view h1 { font-size: 22px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
#report-view h2 { font-size: 18px; margin-top: 24px; }
#report-view h3 { font-size: 15px; margin-top: 16px; }
#report-view pre { background: var(--panel-2); padding: 10px; border-radius: 6px; overflow-x: auto; font-size: 12px; }
#report-view code { font-family: var(--mono); font-size: 12px; }
#report-view hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
#report-view details { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 8px 12px; margin: 8px 0; }