:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-2: #f0f2f5;
  --text: #14171c;
  --muted: #5b6472;
  --line: #e2e5ea;
  --accent: #2f6fed;
  --accent-text: #ffffff;
  --user: #2f6fed;
  --up: #15803d;
  --down: #c2410c;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1014;
    --panel: #161a20;
    --panel-2: #1d222a;
    --text: #e8ebf0;
    --muted: #98a1ae;
    --line: #2a313b;
    --accent: #4f8cff;
    --user: #3b6fe0;
    --up: #4ade80;
    --down: #fb923c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
}
button { font: inherit; cursor: pointer; border: 0; border-radius: 10px; }
button:disabled { opacity: .6; cursor: default; }
.primary { background: var(--accent); color: var(--accent-text); padding: 10px 16px; font-weight: 600; }
.ghost { background: var(--panel-2); color: var(--text); padding: 8px 12px; border: 1px solid var(--line); }
.small { padding: 4px 8px; font-size: 13px; }
.icon-btn { background: transparent; color: var(--text); font-size: 20px; padding: 6px 10px; }
.icon-btn.small { font-size: 16px; padding: 0 6px; color: var(--muted); }
.hint { color: var(--muted); font-size: 13px; margin: 4px 0; }
.err { color: var(--down); }

/* ---- login ---- */
.login-body { align-items: center; justify-content: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 360px; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; gap: 10px;
}
.login-card input {
  font: inherit; padding: 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--text);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.logo {
  display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px;
  background: var(--accent); color: var(--accent-text); font-weight: 800;
}
.login-card .brand { margin-bottom: 8px; font-size: 18px; }

/* ---- layout ---- */
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 8px 16px;
  background: var(--panel); border-bottom: 1px solid var(--line); flex-shrink: 0;
}
.tabs { display: flex; gap: 4px; margin-left: 16px; flex: 1; overflow-x: auto; }
.tab { background: transparent; color: var(--muted); padding: 8px 12px; white-space: nowrap; }
.tab.active { background: var(--panel-2); color: var(--text); font-weight: 600; }
main { flex: 1; min-height: 0; display: flex; }
.view { display: none; flex: 1; min-height: 0; overflow: auto; padding: 20px; }
.view.active { display: block; }
#view-chat.active { display: flex; padding: 0; overflow: hidden; }
.view-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.view-head h2 { margin: 0; }
.only-mobile { display: none; }

/* ---- sidebar ---- */
.sidebar {
  width: 260px; flex-shrink: 0; border-right: 1px solid var(--line); background: var(--panel);
  padding: 12px; display: flex; flex-direction: column; gap: 10px; overflow: auto;
}
.session-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.session-list li {
  display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-radius: 8px; cursor: pointer;
}
.session-list li:hover, .session-list li.active { background: var(--panel-2); }
.s-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }

/* ---- chat ---- */
.chat { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.messages { flex: 1; overflow: auto; padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.empty { margin: auto; text-align: center; max-width: 560px; }
.suggestions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.chip { background: var(--panel); border: 1px solid var(--line); color: var(--text); padding: 8px 12px; border-radius: 999px; }
.msg { display: flex; }
.msg.user { justify-content: flex-end; }
.bubble { max-width: min(860px, 100%); padding: 10px 14px; border-radius: var(--radius); overflow-wrap: anywhere; }
.msg.user .bubble { background: var(--user); color: #fff; white-space: pre-wrap; max-width: min(640px, 85%); }
.msg.assistant .bubble { background: var(--panel); border: 1px solid var(--line); width: 100%; }
.bubble p:first-child { margin-top: 0; }
.bubble p:last-child { margin-bottom: 0; }
.bubble pre { background: var(--panel-2); padding: 10px; border-radius: 8px; overflow: auto; }
.bubble table { border-collapse: collapse; }
.bubble th, .bubble td { border: 1px solid var(--line); padding: 4px 8px; }
.status { color: var(--muted); font-size: 13px; animation: pulse 1.4s infinite; }
@keyframes pulse { 50% { opacity: .4; } }

.composer {
  display: flex; align-items: flex-end; gap: 8px; padding: 12px 16px;
  border-top: 1px solid var(--line); background: var(--panel);
}
.composer textarea {
  flex: 1; resize: none; font: inherit; padding: 10px 12px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--text); max-height: 180px;
}
.speak-toggle { display: flex; align-items: center; gap: 2px; color: var(--muted); padding-bottom: 10px; }
#micBtn.recording { color: #ef4444; animation: pulse 1s infinite; }

/* ---- visuales ---- */
.visual-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; margin: 12px 0;
}
.bubble .visual-card { background: var(--panel-2); }
.visual-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.visual-head h4 { margin: 0; font-size: 15px; }
.visual-actions { display: flex; gap: 6px; }
.visual-note, .visual-meta { color: var(--muted); font-size: 12px; margin: 8px 0 0; }
.visual-pending { color: var(--muted); padding: 12px 0; }
.chart-wrap { position: relative; height: 300px; }
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.kpi-label { color: var(--muted); font-size: 13px; }
.kpi-value { font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; }
.kpi-delta { font-size: 13px; }
.kpi-delta.up { color: var(--up); }
.kpi-delta.down { color: var(--down); }
.table-wrap { overflow: auto; max-height: 420px; }
.table-wrap table { border-collapse: collapse; width: 100%; font-size: 14px; }
.table-wrap th { text-align: left; position: sticky; top: 0; background: var(--panel-2); }
.table-wrap th, .table-wrap td { padding: 6px 10px; border-bottom: 1px solid var(--line); }
.table-wrap td.num { text-align: right; font-variant-numeric: tabular-nums; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(460px, 100%), 1fr)); gap: 16px; margin-top: 12px; }
.grid .visual-card { margin: 0; }

.report-list, .job-list { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; max-width: 900px; }
.report { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px; }
.report summary { cursor: pointer; font-weight: 600; }
.report-body { margin-top: 10px; }
.job {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px;
}
.job h4 { margin: 0 0 4px; }

/* ---- móvil ---- */
@media (max-width: 760px) {
  .only-mobile { display: inline-block; }
  .topbar { padding: 8px; gap: 4px; }
  .brand { display: none; }
  .tabs { margin-left: 0; }
  .view { padding: 16px; }
  .sidebar {
    position: fixed; top: 52px; bottom: 0; left: 0; z-index: 10; transform: translateX(-100%);
    transition: transform .2s; width: 82%; max-width: 320px; box-shadow: 0 0 40px rgba(0,0,0,.3);
  }
  .sidebar.open { transform: none; }
  .messages { padding: 12px; }
  .composer { padding: 8px; padding-bottom: max(8px, env(safe-area-inset-bottom)); }
  .speak-toggle { display: none; }
  .chart-wrap { height: 240px; }
  .job { flex-direction: column; align-items: stretch; }
}