:root {
  --bg: #f6f7f9; --panel: #ffffff; --ink: #1b1f24; --muted: #667085; --line: #e4e7ec;
  --accent: #1f6aa5; --accent-ink: #ffffff; --soft: #eef4fa; --ok: #12805c; --warn: #b54708; --bad: #c0362c;
  --code: #f2f4f7; --radius: 10px;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111418; --panel: #191d23; --ink: #e6e8eb; --muted: #98a2b3; --line: #2b313a;
          --accent: #4a9ad8; --soft: #1d2a36; --code: #222830; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--ink); font-size: 14px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 7px 12px; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
button.danger { color: var(--bad); }
button:disabled { opacity: .5; cursor: default; }
input, select, textarea { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%; }
.muted { color: var(--muted); }
.pill { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; background: var(--soft); }
.pill.ok { color: var(--ok); } .pill.bad { color: var(--bad); } .pill.warn { color: var(--warn); }
.banner { background: var(--bad); color: #fff; padding: 10px 16px; text-align: center; }

/* login */
.login { max-width: 360px; margin: 12vh auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.login h1 { font-size: 20px; margin: 0 0 18px; }
.login label { display: block; margin: 12px 0 4px; color: var(--muted); }
.login button { width: 100%; margin-top: 18px; }
.error { color: var(--bad); margin-top: 10px; min-height: 1em; }

/* layout */
.shell { display: grid; grid-template-columns: 270px 1fr; height: 100vh; }
.side { border-right: 1px solid var(--line); background: var(--panel); display: flex; flex-direction: column; min-height: 0; }
.side header { padding: 16px; border-bottom: 1px solid var(--line); }
.side header b { display: block; font-size: 15px; }
.side .agents { padding: 12px 16px; display: grid; gap: 6px; }
.side .convs { flex: 1; overflow: auto; padding: 4px 8px; }
.conv { padding: 8px 10px; border-radius: 8px; cursor: pointer; display: block; width: 100%; text-align: left; border: 0; background: none; }
.conv:hover, .conv.active { background: var(--soft); }
.conv small { display: block; color: var(--muted); font-size: 11px; }
.side footer { border-top: 1px solid var(--line); padding: 12px 16px; display: flex; gap: 8px; align-items: center; justify-content: space-between; }
.main { display: flex; flex-direction: column; min-height: 0; }
.topbar { padding: 12px 20px; border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 12px; background: var(--panel); }
.topbar h2 { font-size: 15px; margin: 0; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.feed { flex: 1; overflow: auto; padding: 20px; display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 860px; width: 100%; margin: 0 auto; }
.msg.user .bubble { background: var(--accent); color: var(--accent-ink); margin-left: auto; max-width: 75%; width: fit-content; }
.bubble { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px; overflow-x: auto; }
.msg.user .bubble { border-color: var(--accent); }
.who { font-size: 11px; color: var(--muted); margin-bottom: 3px; }
.tool { font-size: 12px; color: var(--muted); border-left: 3px solid var(--line); padding: 2px 10px; }
.tool details summary { cursor: pointer; }
.tool pre { white-space: pre-wrap; max-height: 240px; overflow: auto; background: var(--code); padding: 8px; border-radius: 6px; }
.err .bubble { border-color: var(--bad); color: var(--bad); }
.approval .bubble { border-color: var(--warn); }
.approval .actions { display: flex; gap: 8px; margin-top: 10px; }
.bubble p { margin: 6px 0; } .bubble h1, .bubble h2, .bubble h3 { font-size: 15px; margin: 10px 0 6px; }
.bubble table { border-collapse: collapse; margin: 8px 0; font-size: 13px; }
.bubble th, .bubble td { border: 1px solid var(--line); padding: 4px 8px; text-align: left; }
.bubble td.num { text-align: right; font-variant-numeric: tabular-nums; }
.bubble code { background: var(--code); padding: 1px 4px; border-radius: 4px; }
.bubble ul, .bubble ol { margin: 6px 0; padding-left: 22px; }
.composer { border-top: 1px solid var(--line); padding: 12px 20px; background: var(--panel); }
.composer form { max-width: 860px; margin: 0 auto; display: flex; gap: 8px; }
.composer textarea { resize: none; height: 44px; }
.thinking { color: var(--muted); font-style: italic; }
.empty { margin: auto; text-align: center; color: var(--muted); max-width: 420px; }

/* tareas y admin */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: none; align-items: center; justify-content: center; padding: 16px; }
.modal.open { display: flex; }
.modal .box { background: var(--panel); border-radius: var(--radius); padding: 20px; width: 100%; max-width: 620px; max-height: 90vh; overflow: auto; }
.grid { display: grid; gap: 10px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.admin { max-width: 1100px; margin: 0 auto; padding: 20px 16px; display: grid; gap: 16px; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.kpi { background: var(--soft); border-radius: 8px; padding: 10px 12px; }
.kpi b { display: block; font-size: 18px; font-variant-numeric: tabular-nums; }
table.list { width: 100%; border-collapse: collapse; font-size: 13px; }
table.list th, table.list td { border-bottom: 1px solid var(--line); padding: 6px 4px; text-align: left; vertical-align: top; }

/* ficha del agente */
.ficha { flex: 1; overflow: auto; padding: 20px; }
.fhead { margin-bottom: 12px; }
.flow { display: grid; grid-template-columns: 1fr 24px 1fr 24px 1fr; gap: 8px; align-items: start; }
.flow section { display: grid; gap: 10px; min-width: 0; }
.flow h4 { margin: 8px 0 0; font-size: 13px; }
.flow .arrow { align-self: center; text-align: center; color: var(--muted); font-size: 20px; }
.fcard { background: var(--panel); border: 1px solid var(--line); border-left: 4px solid var(--line); border-radius: 8px;
         padding: 10px 12px; display: grid; gap: 6px; }
.fcard.ok { border-left-color: var(--ok); } .fcard.warn { border-left-color: var(--warn); } .fcard.bad { border-left-color: var(--bad); }
.fcard button { padding: 4px 10px; font-size: 12px; }
.agentbox { background: var(--soft); border: 1px solid var(--accent); border-radius: var(--radius); padding: 14px; display: grid; gap: 8px; }
.step { font-size: 13px; } .step.ok { color: var(--ok); }
.tag { display: inline-block; font-size: 11px; padding: 1px 6px; margin-right: 4px; border-radius: 4px; background: var(--code); }
.small { font-size: 12px; }
.warnline { color: var(--warn); }
@media (max-width: 1100px) {
  .flow { grid-template-columns: 1fr; }
  .flow .arrow { transform: rotate(90deg); }
}

@media (max-width: 760px) {
  .shell { grid-template-columns: 1fr; }
  .side { display: none; }
  .side.open { display: flex; position: fixed; inset: 0; z-index: 5; }
  .feed { padding: 12px 16px; }
  .composer { padding: 10px 16px; }
}