/* ============================================================
   Clinical Embedding Studio — design tokens
   Palette: clinical / pharma-data. Restrained navy + slate +
   subtle teal accent. Inter for body and UI.
   ============================================================ */
:root {
  --ink-900: #0d1424;
  --ink-700: #1d2840;
  --ink-500: #4a5876;
  --ink-400: #6b7896;
  --ink-300: #9aa3bb;

  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-2: #f9fafd;
  --surface-3: #eef2f8;

  --border: #e2e8f0;
  --border-strong: #cbd5e2;

  --primary: #1d3a6f;
  --primary-hover: #14284f;
  --primary-soft: #e7edf7;

  --accent: #0e7c66;
  --accent-soft: #defaf2;

  --warn: #b67100;
  --warn-soft: #fff4dd;
  --danger: #b8362d;
  --danger-soft: #fbe9e7;

  --shadow-sm: 0 1px 2px rgba(13, 20, 36, 0.05);
  --shadow-md: 0 4px 12px rgba(13, 20, 36, 0.08);
  --shadow-lg: 0 14px 40px -8px rgba(13, 20, 36, 0.18);

  --radius-sm: 4px;
  --radius: 6px;
  --radius-lg: 10px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
}

@supports (font-variation-settings: normal) {
  :root { --font-sans: 'Inter var', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-900);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

a { color: var(--primary); }

/* ============================================================
   Topbar
   ============================================================ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary) 0%, #2a4d8c 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.brand-mark svg { width: 20px; height: 20px; }

.brand-title {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}
.brand-subtitle {
  font-size: 12px;
  color: var(--ink-400);
  font-family: var(--font-mono);
  letter-spacing: -0.005em;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-500);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-300);
  box-shadow: 0 0 0 3px rgba(154, 163, 187, 0.18);
}
.status-dot[data-state="ok"] {
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(14, 124, 102, 0.18);
}
.status-dot[data-state="warn"] {
  background: var(--warn);
  box-shadow: 0 0 0 3px rgba(182, 113, 0, 0.18);
}
.status-dot[data-state="error"] {
  background: var(--danger);
  box-shadow: 0 0 0 3px rgba(184, 54, 45, 0.2);
}
.status-dot[data-state="loading"] {
  background: var(--primary);
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(29, 58, 111, 0.18); }
  50%      { box-shadow: 0 0 0 6px rgba(29, 58, 111, 0.05); }
}

/* ============================================================
   Tabs
   ============================================================ */
.tabs {
  display: flex;
  gap: 4px;
  padding: 0 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  background: transparent;
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.12s ease;
}
.tab svg { width: 15px; height: 15px; opacity: 0.85; }
.tab:hover { color: var(--ink-900); }
.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

/* ============================================================
   Main / panels
   ============================================================ */
main {
  flex: 1;
  padding: 28px 28px 56px;
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.15s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; transform: none; } }

.panel-header { margin-bottom: 18px; }
.panel-header h2 {
  margin: 0 0 4px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink-900);
}
.panel-header p {
  margin: 0;
  color: var(--ink-500);
  font-size: 13px;
  max-width: 80ch;
}

/* ============================================================
   Query bar (the primary input row on each tab)
   ============================================================ */
.query-bar {
  display: flex;
  align-items: stretch;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.query-bar:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29, 58, 111, 0.12), var(--shadow-sm);
}

.query-bar-stacked {
  flex-direction: column;
  align-items: stretch;
}
.query-bar-stacked .query-input { width: 100%; }
.query-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.query-input {
  flex: 1;
  border: 0;
  outline: none;
  background: transparent;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--ink-900);
  min-width: 0;
}
.query-input::placeholder { color: var(--ink-300); }
textarea.query-input { resize: vertical; font-family: var(--font-sans); }
select.query-input { padding: 8px 10px; }

/* primary submit button */
button.primary {
  background: var(--primary);
  color: white;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-weight: 500;
  font-size: 13px;
  cursor: pointer;
  letter-spacing: 0.005em;
  transition: background 0.12s ease;
}
button.primary:hover:not(:disabled) { background: var(--primary-hover); }
button.primary:disabled {
  background: var(--ink-300);
  cursor: not-allowed;
}

/* ============================================================
   Popover (settings dropdown)
   ============================================================ */
.popover { position: relative; }

.popover-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  cursor: pointer;
  color: var(--ink-500);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.12s ease;
}
.popover-trigger:hover { color: var(--ink-900); border-color: var(--border-strong); background: var(--surface-2); }
.popover-trigger svg { width: 14px; height: 14px; }
.popover-trigger[aria-expanded="true"] {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

.popover-panel {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 50;
  min-width: 280px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 12px 14px;
}
.popover-trigger[aria-expanded="true"] + .popover-panel { display: block; }

.popover-field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
.popover-field:last-child { margin-bottom: 0; }
.popover-field label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.popover-field input,
.popover-field select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  background: var(--surface);
  outline: none;
  font-size: 13px;
}
.popover-field input:focus,
.popover-field select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29, 58, 111, 0.12);
}
.popover-field .field-hint {
  margin: 4px 0 0;
  font-size: 11px;
  color: var(--ink-400);
  line-height: 1.4;
}

/* ============================================================
   Result meta bar (count + latency)
   ============================================================ */
.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--ink-500);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}
.result-meta strong { color: var(--ink-900); font-weight: 600; }

/* ============================================================
   Tables (Search, Cohort)
   ============================================================ */
.data-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

table.data {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
}
table.data thead th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-400);
  background: var(--surface-2);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
}
table.data tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--ink-700);
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover td { background: var(--surface-2); }

td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--font-mono); font-size: 12.5px; }
td.snippet { font-family: var(--font-mono); font-size: 12px; color: var(--ink-700); max-width: 36rem; line-height: 1.55; }

/* similarity score badge */
.sim {
  display: inline-block;
  padding: 2px 8px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
}
.sim-low  { background: var(--surface-3); color: var(--ink-500); }
.sim-mid  { background: var(--primary-soft); color: var(--primary); }
.sim-high { background: var(--accent-soft); color: var(--accent); }

.chip {
  display: inline-block;
  background: var(--surface-3);
  color: var(--ink-700);
  border-radius: 4px;
  padding: 2px 7px;
  margin: 1px 4px 1px 0;
  font-size: 11px;
  font-family: var(--font-mono);
  border: 1px solid transparent;
}
.chip:hover { border-color: var(--border-strong); }
.chip-icd  { background: #f0eaf8; color: #573289; }
.chip-chap { background: var(--accent-soft); color: var(--accent); }

/* ============================================================
   Ask / answer card
   ============================================================ */
.answer-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
.answer-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.answer-card-header .label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}
.answer-card-header .meta {
  font-size: 11px;
  color: var(--ink-400);
  font-family: var(--font-mono);
}
.answer-card .answer-body {
  font-size: 14px;
  color: var(--ink-900);
  line-height: 1.6;
  white-space: pre-wrap;
  margin: 0;
}

.retrieval-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 18px 0 8px;
}
.retrieval-header h3 {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.retrieval-header .hint {
  font-size: 11px;
  color: var(--ink-400);
  font-family: var(--font-mono);
}

/* ============================================================
   States
   ============================================================ */
.loading-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  color: var(--ink-500);
  font-size: 13px;
}
.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state, .error-state, .warn-state {
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.empty-state { background: var(--surface-2); border: 1px dashed var(--border-strong); color: var(--ink-500); }
.error-state { background: var(--danger-soft); border: 1px solid #f1c0bd; color: var(--danger); }
.warn-state  { background: var(--warn-soft); border: 1px solid #f6d99b; color: var(--warn); }

/* ============================================================
   Trajectory
   ============================================================ */
.trajectory-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}
.stat-block {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-block .stat-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.stat-block .stat-value {
  font-size: 17px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--ink-900);
}

.chart-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 1100px) {
  .chart-grid { grid-template-columns: 1fr 1fr; }
}
.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow-sm);
  min-height: 360px;
}

/* ============================================================
   Footer
   ============================================================ */
.appfoot {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 10px 28px;
  font-size: 11.5px;
  color: var(--ink-400);
  font-family: var(--font-mono);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.appfoot-sep { color: var(--border-strong); }

/* ============================================================
   Mode switch (segmented control)
   ============================================================ */
.mode-switch {
  display: inline-flex;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px;
  margin-bottom: 12px;
  gap: 2px;
}
.mode-btn {
  background: transparent;
  border: 0;
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-500);
  cursor: pointer;
  transition: all 0.12s ease;
}
.mode-btn:hover:not(.active) { color: var(--ink-900); }
.mode-btn.active {
  background: var(--surface);
  color: var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   Trajectory interpretation card
   ============================================================ */
.interpret-card {
  margin-top: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
}
.interpret-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.interpret-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
}
.interpret-meta {
  font-size: 11px;
  color: var(--ink-400);
  font-family: var(--font-mono);
}
.interpret-body {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink-900);
  white-space: pre-wrap;
}
.interpret-body strong {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-500);
  margin: 10px 0 4px;
}
.interpret-body strong:first-child { margin-top: 0; }
.interpret-body code.note-ref {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 11.5px;
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 500;
}

/* utility */
.hidden, [hidden] { display: none !important; }
code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--surface-3);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--ink-700);
}