:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c2330;
  --line: #232b3a;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #7c5cff;
  --accent-2: #00d4a4;
  --warn: #ff9f43;
  --bad: #ff6b6b;
  --good: #00d4a4;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  min-height: 100vh;
}

header {
  padding: 28px 32px 8px;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; gap: 16px; align-items: center; }
.logo {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 26px; color: #0e1116;
  font-weight: 800;
}
header h1 { margin: 0; font-size: 20px; letter-spacing: 0.2px; }
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

main {
  max-width: 1100px;
  margin: 24px auto 80px;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
}
.card h2 {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 600;
  display: flex; gap: 10px; align-items: center;
}
.step {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  background: var(--accent);
  color: #0e1116;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 800;
}
.hint { color: var(--muted); margin: -6px 0 14px; font-size: 13px; }
.hidden { display: none !important; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 10px;
}
.survey-tile {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  cursor: pointer;
  transition: 0.15s border-color, 0.15s transform;
}
.survey-tile:hover { border-color: var(--accent); transform: translateY(-1px); }
.survey-tile .name { font-weight: 600; }
.survey-tile .count { color: var(--muted); font-size: 12px; margin-top: 4px; }
.survey-tile.selected { border-color: var(--accent); background: #20162e; }

.row {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  margin-bottom: 12px;
}
.row .meta { margin-left: auto; color: var(--muted); font-size: 13px; }
input, button {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
}
input { min-width: 220px; }
button { cursor: pointer; transition: 0.12s; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary, #predict-btn {
  background: linear-gradient(135deg, var(--accent), #5e3eff);
  border: 0;
  color: white;
  font-weight: 600;
  padding: 10px 18px;
}
button.ghost {
  background: transparent;
}

.filter-row {
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 12px;
}
.filter-group { display: flex; gap: 6px; align-items: center; }
.filter-group label {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-right: 4px;
}
.filter-group input[type=number] {
  width: 90px; min-width: 0;
  padding: 6px 8px;
  font-size: 12px;
}
.filter-group .sep { color: var(--muted); }
#filter-meta { margin-left: auto; color: var(--muted); font-size: 12px; }

.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 5px 10px;
  border-radius: 14px;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
  transition: 0.12s;
}
.chip:hover { color: var(--text); border-color: var(--accent); }
.chip.on {
  background: rgba(124, 92, 255, 0.2);
  border-color: var(--accent);
  color: var(--text);
}

.resp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 8px;
  max-height: 360px;
  overflow-y: auto;
  padding: 4px;
}
.resp-tile {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  transition: 0.12s;
}
.resp-tile:hover { border-color: var(--accent); }
.resp-tile.selected { border-color: var(--accent); background: #20162e; }
.resp-tile .rid { font-weight: 600; }
.resp-tile .sub { color: var(--muted); font-size: 11px; margin-top: 4px; }

.qlist { display: flex; flex-direction: column; gap: 8px; max-height: 480px; overflow-y: auto; }
.qrow {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  display: flex; gap: 12px; align-items: flex-start;
}
.qrow input[type=checkbox] { margin-top: 4px; transform: scale(1.15); accent-color: var(--accent); }
.qrow .qtext { font-weight: 500; }
.qrow .qmeta { color: var(--muted); font-size: 12px; margin-top: 4px; }
.qrow .qans { color: var(--accent-2); font-size: 12px; margin-top: 6px; word-break: break-word; }
.qrow.checked { border-color: var(--accent); background: #1d1832; }
.actions { margin-top: 14px; display: flex; justify-content: flex-end; }

.result-card {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 14px;
}
.result-card .qtitle {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}
.result-card .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 10px; }
.result-card .col label { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.result-card .pill {
  display: inline-block;
  padding: 4px 10px;
  margin: 4px 4px 0 0;
  border-radius: 16px;
  background: #2a3140;
  font-size: 12px;
}
.result-card .pill.predicted { background: rgba(124, 92, 255, 0.2); border: 1px solid var(--accent); }
.result-card .pill.actual { background: rgba(0, 212, 164, 0.18); border: 1px solid var(--accent-2); }
.match-banner {
  padding: 6px 10px; border-radius: 6px; font-size: 12px; font-weight: 600;
  display: inline-block; margin-top: 8px;
}
.match-banner.exact { background: rgba(0, 212, 164, 0.18); color: var(--good); }
.match-banner.partial { background: rgba(255, 159, 67, 0.18); color: var(--warn); }
.match-banner.none { background: rgba(255, 107, 107, 0.18); color: var(--bad); }
.reason { color: var(--muted); font-size: 12px; margin-top: 8px; font-style: italic; }

.dist-bars { margin-top: 12px; }
.dist-row {
  display: grid; grid-template-columns: 200px 1fr 60px; gap: 8px;
  align-items: center; margin-bottom: 4px; font-size: 12px;
}
.dist-row .label { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dist-row .bar {
  height: 14px; background: #2a3140; border-radius: 4px; overflow: hidden;
}
.dist-row .fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.dist-row.predicted .fill { background: linear-gradient(90deg, var(--accent), #b08aff); }
.dist-row.actual .fill { background: linear-gradient(90deg, var(--accent-2), #6dffd3); }
.dist-row .pct { text-align: right; color: var(--muted); }
.dist-row.highlight-pred .label { color: var(--accent); font-weight: 600; }
.dist-row.highlight-actual .label { color: var(--accent-2); font-weight: 600; }

/* custom question composer (Step 5) */
.cq-row {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cq-head {
  display: flex; gap: 8px; align-items: center;
}
.cq-head select {
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  flex: 1;
}
.cq-remove {
  background: transparent;
  border: 1px solid var(--line);
  width: 30px; height: 30px;
  padding: 0;
  font-size: 18px;
  line-height: 1;
  color: var(--muted);
  border-radius: 6px;
}
.cq-remove:hover { color: var(--bad); border-color: var(--bad); }
.cq-row textarea {
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  min-height: 50px;
  resize: vertical;
  width: 100%;
}
.cq-options-wrap { display: flex; flex-direction: column; gap: 4px; }
.cq-options-wrap label {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.cq-options-wrap textarea {
  min-height: 64px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
}
.cq-rationale {
  font-size: 12px;
  color: var(--accent-2);
  background: rgba(0, 212, 164, 0.08);
  border-left: 3px solid var(--accent-2);
  padding: 6px 10px;
  border-radius: 0 6px 6px 0;
  font-style: italic;
}
.refs {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}
.refs label {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.ref-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
}
.ref {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 12px;
  background: rgba(124, 92, 255, 0.06);
  border-left: 2px solid var(--accent);
  padding: 5px 10px;
  border-radius: 0 6px 6px 0;
}
.ref-label {
  color: var(--accent);
  font-weight: 600;
  min-width: 90px;
}
.ref-arrow { color: var(--muted); }
.ref-answer {
  color: var(--text);
  word-break: break-word;
}

#suggest-count {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 7px 8px;
  border-radius: 8px;
  font-size: 12px;
  font-family: inherit;
}

.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--panel-2); border: 1px solid var(--line);
  padding: 12px 18px; border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}

.spinner {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid var(--muted); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
  vertical-align: middle; margin-right: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- mobile / responsive ---------- */
@media (max-width: 640px) {
  html, body { font-size: 13px; }

  header { padding: 16px 14px 8px; }
  .brand { gap: 12px; }
  .logo { width: 38px; height: 38px; font-size: 22px; border-radius: 10px; }
  header h1 { font-size: 16px; }
  .tagline { font-size: 12px; }

  main { margin: 14px auto 48px; padding: 0 12px; gap: 14px; }
  .card { padding: 15px 13px; border-radius: 12px; }
  .card h2 { font-size: 14px; }
  .hint { font-size: 12px; }

  /* inputs go full-width so they never overflow the viewport */
  input { min-width: 0; width: 100%; }
  .row { gap: 8px; }
  .row .meta,
  #filter-meta,
  #survey-meta,
  #survey-search-meta { margin-left: 0; width: 100%; }

  /* tile grids collapse toward one/two columns */
  .grid { grid-template-columns: 1fr; }
  .resp-grid {
    grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
    max-height: 300px;
  }

  /* respondent filter bar stacks vertically */
  .filter-row { flex-direction: column; align-items: stretch; gap: 10px; }
  .filter-group { flex-wrap: wrap; }
  .filter-group input[type=number] { flex: 1; width: auto; }
  .filter-row > button { width: 100%; }

  /* answers + results stack to a single column */
  .qrow { padding: 10px 12px; }
  .result-card { padding: 14px; }
  .result-card .row2 { grid-template-columns: 1fr !important; }

  /* generate + answer action bar: clear full-width tap targets */
  #step-ask .row > button { flex: 1 1 100%; padding: 12px; }
  #step-ask .row > span { display: none; }
  #suggest-count { flex: 1 1 100%; }

  /* toast spans the bottom of the screen */
  .toast { left: 12px; right: 12px; bottom: 12px; text-align: center; }
}