/* AutoAnalyst — "analyst lab" theme: deep slate + emerald/teal, violet accents.
   No external fonts (system stack), no framework. */
:root {
  --bg:        #0a0e14;
  --bg-grad:   radial-gradient(1200px 600px at 80% -10%, #11202022, transparent),
               radial-gradient(900px 500px at -10% 110%, #1a163322, transparent);
  --panel:     #111823;
  --panel-2:   #0e151f;
  --elev:      #16202d;
  --border:    #1f2c3a;
  --border-2:  #2a3a4d;
  --text:      #e8eef5;
  --muted:     #8a9bb0;
  --faint:     #5d6e83;
  --emerald:   #2ee6a6;
  --teal:      #19c8c8;
  --violet:    #9a86ff;
  --cyan:      #7fe3ff;
  --amber:     #ffcf6b;
  --red:       #ff7a85;
  --code-bg:   #0b1119;
  --shadow:    0 10px 30px -12px rgba(0,0,0,.6);
  --radius:    14px;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg-grad), var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { margin: 0; font-weight: 650; letter-spacing: -0.01em; }
.muted { color: var(--muted); }
.hidden { display: none !important; }

/* ---- top bar ---- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 26px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0d141d, #0a0e1400);
  position: sticky; top: 0; z-index: 10; backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(150deg, #103030, #15203a);
  border: 1px solid var(--border-2);
  box-shadow: inset 0 1px 0 #ffffff0d;
}
.logo .bar { fill: var(--emerald); }
.logo .b2 { fill: var(--teal); }
.logo .b3 { fill: var(--violet); }
.brand-text h1 { font-size: 19px; }
.brand-text p { margin: 2px 0 0; font-size: 12.5px; color: var(--muted); }

.status {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 14px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--border);
  font-size: 13px; color: var(--muted);
}
.status .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--faint); box-shadow: 0 0 0 0 transparent;
}
.status.online .dot { background: var(--emerald); box-shadow: 0 0 10px 1px #2ee6a688; animation: pulse 2.4s infinite; }
.status.online .label { color: var(--emerald); }
.status.offline .dot { background: var(--red); }
.status.offline .label { color: var(--red); }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.5} }

/* ---- layout ---- */
.layout {
  display: grid; grid-template-columns: 340px 1fr;
  gap: 22px; max-width: 1280px; margin: 0 auto; padding: 22px 26px 60px;
}
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

.panel {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow);
}
.panel + .panel { margin-top: 18px; }
.panel-title { font-size: 13px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--faint); margin-bottom: 12px; }

/* ---- dataset cards ---- */
.dataset-grid { display: grid; gap: 9px; }
.ds-card {
  text-align: left; cursor: pointer; width: 100%;
  background: var(--elev); border: 1px solid var(--border);
  border-radius: 11px; padding: 11px 13px; color: var(--text);
  transition: border-color .15s, transform .12s, background .15s;
}
.ds-card:hover { border-color: var(--border-2); transform: translateY(-1px); }
.ds-card.active {
  border-color: var(--emerald);
  background: linear-gradient(180deg, #13302750, var(--elev));
  box-shadow: inset 0 0 0 1px #2ee6a64d;
}
.ds-card .ds-name { font-weight: 600; font-size: 14px; }
.ds-card .ds-desc { font-size: 12px; color: var(--muted); margin-top: 3px; line-height: 1.4; }

.upload { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border); }
.upload-btn {
  width: 100%; cursor: pointer; color: var(--text);
  background: var(--elev); border: 1px dashed var(--border-2);
  border-radius: 10px; padding: 10px; font-size: 13px;
  transition: border-color .15s, color .15s;
}
.upload-btn:hover { border-color: var(--emerald); color: var(--emerald); }
.up-ico { margin-right: 6px; }
.upload-hint { text-align: center; font-size: 11px; color: var(--faint); margin: 6px 0 0; }

/* ---- schema ---- */
.schema-meta { margin: -4px 0 10px; font-size: 12.5px; color: var(--muted); }
.schema-scroll { max-height: 320px; overflow: auto; border-radius: 10px; }
#schemaTable { width: 100%; border-collapse: collapse; font-size: 12.5px; }
#schemaTable th { position: sticky; top: 0; background: var(--panel-2);
  text-align: left; color: var(--faint); font-weight: 600; padding: 7px 9px;
  border-bottom: 1px solid var(--border); text-transform: uppercase; font-size: 10.5px; letter-spacing: .05em; }
#schemaTable td { padding: 6px 9px; border-bottom: 1px solid #16202c; color: var(--muted);
  white-space: nowrap; max-width: 160px; overflow: hidden; text-overflow: ellipsis; }
#schemaTable td.col-name { color: var(--text); font-weight: 500; }
#schemaTable td .dtype { color: var(--teal); font-family: ui-monospace, monospace; font-size: 11px; }

/* ---- ask bar ---- */
.ask { display: flex; gap: 12px; align-items: stretch; }
#question {
  flex: 1; resize: vertical; min-height: 52px;
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 13px 15px; font: inherit; line-height: 1.45;
  transition: border-color .15s, box-shadow .15s;
}
#question:focus { outline: none; border-color: var(--emerald);
  box-shadow: 0 0 0 3px #2ee6a622; }
#question::placeholder { color: var(--faint); }
.analyze {
  flex: 0 0 auto; padding: 0 22px; cursor: pointer;
  background: linear-gradient(180deg, var(--emerald), #14b88a);
  color: #04221a; font-weight: 700; font-size: 14.5px;
  border: none; border-radius: 12px; min-width: 116px;
  box-shadow: 0 6px 18px -6px #2ee6a677; transition: filter .15s, transform .1s;
}
.analyze:hover:not(:disabled) { filter: brightness(1.06); }
.analyze:active:not(:disabled) { transform: translateY(1px); }
.analyze:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }
.analyze.busy { color: transparent; position: relative; }
.analyze.busy::after {
  content: ""; position: absolute; inset: 0; margin: auto;
  width: 18px; height: 18px; border-radius: 50%;
  border: 2.5px solid #04221a55; border-top-color: #04221a;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- example chips ---- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chip {
  cursor: pointer; font-size: 12.5px; color: var(--muted);
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 13px; transition: all .14s;
}
.chip:hover { color: var(--text); border-color: var(--teal); background: #102028; }

/* ---- results / trace ---- */
.results { margin-top: 22px; display: flex; flex-direction: column; gap: 14px; }
.empty { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty-mark { font-size: 42px; opacity: .55; }
.empty h3 { margin: 10px 0 6px; font-size: 18px; color: var(--text); }
.empty p { max-width: 460px; margin: 0 auto; font-size: 13.5px; }

.thinking { display: flex; align-items: center; gap: 12px; color: var(--muted);
  font-size: 13.5px; padding: 6px 2px; }
.thinking .orb { width: 14px; height: 14px; border-radius: 50%;
  background: var(--emerald); box-shadow: 0 0 14px 2px #2ee6a6aa; animation: pulse 1.1s infinite; }

.step {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  overflow: hidden; box-shadow: var(--shadow);
  animation: slideIn .35s ease both;
}
@keyframes slideIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.step-head {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-bottom: 1px solid var(--border);
  background: #0d1521;
}
.step-badge {
  width: 24px; height: 24px; border-radius: 7px; flex: 0 0 auto;
  display: grid; place-items: center; font-size: 12px; font-weight: 700;
  color: #04221a; background: linear-gradient(180deg, var(--teal), #0e9c9c);
}
.step-tool { font-family: ui-monospace, monospace; font-size: 12.5px; color: var(--teal); }
.step-tool b { color: var(--text); }

.code {
  margin: 0; padding: 14px 16px; overflow-x: auto;
  background: var(--code-bg); font-family: ui-monospace, SFMono-Regular, Menlo,
  Consolas, monospace; font-size: 12.8px; line-height: 1.6; color: #cdd9e5;
}
.code .kw  { color: var(--violet); }
.code .str { color: var(--emerald); }
.code .num { color: var(--amber); }
.code .com { color: var(--faint); font-style: italic; }
.code .bi  { color: var(--cyan); }

.io { padding: 0 16px; }
.io-block { margin: 12px 0; }
.io-label { font-size: 10.5px; text-transform: uppercase; letter-spacing: .07em;
  color: var(--faint); margin-bottom: 5px; }
.io-out {
  margin: 0; padding: 11px 13px; border-radius: 9px;
  background: #0c1119; border: 1px solid var(--border);
  font-family: ui-monospace, monospace; font-size: 12.3px; color: var(--muted);
  white-space: pre-wrap; word-break: break-word; max-height: 280px; overflow: auto;
}
.io-out.err { color: var(--red); border-color: #3a1f24; background: #1a0f12; }
.chart-wrap { padding: 4px 16px 16px; }
.chart-wrap img { width: 100%; border-radius: 10px; border: 1px solid var(--border);
  background: #fff; display: block; }

/* ---- final answer ---- */
.answer {
  border: 1px solid #1f5a48; border-radius: var(--radius);
  background: linear-gradient(180deg, #0f2a23, #0c1a18);
  padding: 18px 20px; box-shadow: 0 0 0 1px #2ee6a622, var(--shadow);
  animation: slideIn .4s ease both;
}
.answer .a-head { display: flex; align-items: center; gap: 9px; margin-bottom: 8px; }
.answer .a-mark { color: var(--emerald); font-size: 17px; }
.answer .a-title { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--emerald); }
.answer .a-body { font-size: 15px; line-height: 1.65; color: var(--text); white-space: pre-wrap; }
.answer .a-meta { margin-top: 12px; font-size: 11.5px; color: var(--faint); }

.banner-err {
  border: 1px solid #3a1f24; background: #1a0f12; color: var(--red);
  border-radius: 12px; padding: 13px 15px; font-size: 13.5px;
}
.banner-err b { color: #ffb3ba; }