:root {
  --bg: #0f1419;
  --panel: #1a212b;
  --panel-2: #232c38;
  --border: #2d3744;
  --text: #e6edf3;
  --muted: #94a3b8;
  --accent: #4cc2ff;
  --accent-2: #ffd166;
  --danger: #ff6b6b;
  --ok: #5ad19a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  padding: 1.4rem 2rem 1rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #131a22, var(--bg));
}
header h1 { margin: 0; font-size: 1.4rem; }
header h1 .wordmark { color: var(--muted); font-weight: 400; font-size: .95rem; }
header .sub { margin: .25rem 0 0; color: var(--muted); font-size: .9rem; }
header .db-stats { margin: .4rem 0 0; color: var(--muted); font-size: .78rem; font-variant-numeric: tabular-nums; }
header .db-stats b { color: var(--accent); font-weight: 600; }

main { max-width: 1200px; margin: 0 auto; padding: 1.5rem 2rem 3rem; }

/* Tabs */
.tabs { display: flex; gap: .25rem; max-width: 1200px; margin: 0 auto; padding: 0 2rem; border-bottom: 1px solid var(--border); }
.tabs .tab {
  background: transparent; border: none; color: var(--muted);
  padding: .7rem 1.1rem; font-size: .95rem; cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tabs .tab:hover { color: var(--text); }
.tabs .tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

/* Explorer */
.explore-controls {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: .8rem 1rem; align-items: end;
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1rem 1.2rem;
}
.filter-field { display: flex; flex-direction: column; }
.filter-field label, .checkbox-field { font-size: .78rem; color: var(--muted); margin-bottom: .3rem; }
.explore-controls input[type=text], .explore-controls input[type=number], .explore-controls select {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: .45rem .55rem; font-size: .9rem; width: 100%;
}
.explore-controls select[multiple] { height: 6.5rem; }
.range-inputs { display: flex; gap: .4rem; }
.range-inputs input { width: 50%; }
.checkbox-field { display: flex; align-items: center; gap: .4rem; margin: 0; }
.explore-actions { display: flex; gap: .5rem; align-items: end; }
.explore-actions .primary { padding: .5rem 1rem; }

.explore-toolbar { display: flex; justify-content: space-between; align-items: center; margin: 1rem 0 .5rem; }
.exp-total { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }
.explore-toolbar-right { display: flex; gap: 1rem; align-items: center; }
.page-size { color: var(--muted); font-size: .82rem; }
.page-size select { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 6px; padding: .2rem .3rem; }

.explore-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }
.explore-table { width: 100%; border-collapse: collapse; font-size: .84rem; }
.explore-table th, .explore-table td { padding: .45rem .6rem; text-align: left; border-bottom: 1px solid var(--border); white-space: normal; vertical-align: top; overflow-wrap: anywhere; word-break: break-word; }
.explore-table th { color: var(--muted); position: sticky; top: 0; background: var(--panel); }
/* Cap the wide text columns so long IUPAC names wrap instead of stretching the table. */
.explore-table th:first-child, .explore-table td:first-child { max-width: 22rem; }
.explore-table td:nth-child(2) { max-width: 16rem; }
.explore-table th.sortable { cursor: pointer; user-select: none; }
.explore-table th.sortable:hover { color: var(--text); }
.explore-table tbody tr:hover { background: var(--panel-2); }
.explore-table .dim { color: var(--muted); font-size: .92em; }
.explore-table .exp-empty { text-align: center; color: var(--muted); padding: 1.5rem; font-style: italic; }
.link-btn { background: transparent; border: 1px solid var(--border); color: var(--accent); border-radius: 6px; padding: .25rem .5rem; cursor: pointer; font-size: .8rem; }
.link-btn:hover { border-color: var(--accent); }

.explore-pager { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-top: 1rem; }
.explore-pager .secondary { margin-top: 0; }
.explore-pager span { color: var(--muted); font-size: .85rem; }

/* Explore mode toggle */
.mode-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-bottom: 1rem; }
.mode-toggle .mode-btn { background: var(--panel); color: var(--muted); border: none; padding: .5rem 1.1rem; cursor: pointer; font-size: .9rem; }
.mode-toggle .mode-btn.active { background: var(--accent); color: #00131f; font-weight: 600; }

/* Chemicals list controls */
.chem-controls { display: flex; gap: 1.2rem; align-items: end; flex-wrap: wrap; margin-bottom: .5rem; }
.chem-controls .search-wrap { flex: 1 1 320px; }
.chem-controls input[type=text] {
  width: 100%; background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: .55rem .7rem; font-size: .95rem;
}

/* Per-row action buttons + SSD pill */
.explore-table td.num, .explore-table th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.row-actions { display: flex; gap: .4rem; white-space: nowrap; }
.pill { display: inline-block; padding: .12rem .5rem; border-radius: 20px; font-size: .76rem; }
.pill-ok { background: rgba(90,209,154,.15); color: var(--ok); }
.pill-off { background: var(--panel-2); color: var(--muted); }

/* Per-chemical profile panel */
.exp-profile { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1rem 1.2rem; margin-bottom: 1rem; }
.prof-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.prof-head h2 { margin: 0 0 .3rem; font-size: 1.1rem; }
.prof-head .primary { padding: .5rem 1rem; white-space: nowrap; }
.prof-counts { color: var(--muted); font-size: .85rem; }
.prof-counts b { color: var(--text); }
.prof-conc { margin: .6rem 0 .2rem; color: var(--muted); font-size: .85rem; }
.prof-conc b { color: var(--accent-2); font-variant-numeric: tabular-nums; }
.prof-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: .8rem 1.2rem; margin-top: .8rem; }
.prof-block h4 { margin: 0 0 .4rem; font-size: .8rem; color: var(--muted); font-weight: 600; }
.chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.chips .chip { background: var(--panel-2); border: 1px solid var(--border); border-radius: 16px; padding: .2rem .6rem; font-size: .78rem; }
.chips .chip b { color: var(--accent); }

.controls {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.search-wrap { position: relative; flex: 1 1 340px; min-width: 280px; }
.search-wrap label { display: block; font-size: .8rem; color: var(--muted); margin-bottom: .3rem; }
#search {
  width: 100%;
  padding: .65rem .8rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
}
#search:focus { outline: none; border-color: var(--accent); }

.suggestions {
  position: absolute;
  z-index: 20;
  left: 0; right: 0;
  margin: .3rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 320px;
  overflow-y: auto;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
.suggestions li {
  padding: .55rem .8rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
}
.suggestions li:last-child { border-bottom: none; }
.suggestions li:hover, .suggestions li.active { background: var(--panel); }
.suggestions .name { font-weight: 600; }
.suggestions .meta { color: var(--muted); font-size: .8rem; white-space: nowrap; }

.endpoint-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.endpoint-toggle button {
  background: var(--panel);
  color: var(--muted);
  border: none;
  padding: .65rem 1rem;
  cursor: pointer;
  font-size: .9rem;
}
.endpoint-toggle button.active { background: var(--accent); color: #00131f; font-weight: 600; }

button.primary {
  background: var(--accent);
  color: #00131f;
  border: none;
  padding: .68rem 1.4rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
button.primary:disabled { background: var(--border); color: var(--muted); cursor: not-allowed; }
button.secondary {
  margin-top: 1rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: .5rem .9rem;
  border-radius: 8px;
  cursor: pointer;
}
button.secondary:hover { border-color: var(--accent); }

.selected { margin-top: 1rem; color: var(--muted); }
.selected strong { color: var(--text); }

/* Data preview */
.preview { margin-top: 1.2rem; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1rem 1.2rem; }
.preview h2 { margin: .1rem 0 .8rem; font-size: 1.05rem; }
.preview-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 700px) { .preview-cards { grid-template-columns: 1fr; } }
.preview-card { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: .8rem 1rem; }
.preview-card.active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.pc-head { font-weight: 600; margin-bottom: .35rem; }
.pc-counts { color: var(--muted); font-size: .85rem; }
.pc-counts b { color: var(--text); }
.pc-stats { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: .55rem; font-size: .85rem; color: var(--muted); }
.pc-stats b { color: var(--accent-2); font-variant-numeric: tabular-nums; }
.pc-units { color: var(--muted); font-size: .72rem; margin-top: .45rem; }
.pc-empty { color: var(--muted); font-style: italic; margin-top: .5rem; }

.preview-table-wrap { margin-top: 1rem; }
.preview-table-head h3 { margin: .2rem 0 .5rem; font-size: .9rem; color: var(--muted); font-weight: 600; }
.preview-table-head span { color: var(--accent); font-weight: 400; }
.preview-table th, .preview-table td { padding: .35rem .5rem; border-bottom: 1px solid var(--border); text-align: left; font-size: .85rem; }
.preview-table th { color: var(--muted); }
.preview-table td.num, .preview-table th:nth-child(3), .preview-table th:nth-child(4) { text-align: right; font-variant-numeric: tabular-nums; }
.preview-table .dim { color: var(--muted); }

.chart-toolbar { display: flex; justify-content: flex-end; margin-bottom: .3rem; }
.chart-toolbar button.secondary { margin-top: 0; padding: .35rem .7rem; font-size: .82rem; }

.status { margin-top: 1rem; padding: .8rem 1rem; border-radius: 8px; background: var(--panel); border: 1px solid var(--border); }
.status.error { border-color: var(--danger); color: #ffd0d0; }

/* Fit / bootstrap progress bar */
.progress { margin-top: 1rem; padding: .8rem 1rem; border-radius: 10px; background: var(--panel); border: 1px solid var(--border); }
.progress-label { display: flex; justify-content: space-between; font-size: .85rem; color: var(--muted); margin-bottom: .5rem; }
.progress-label #progress-pct { color: var(--accent); font-variant-numeric: tabular-nums; }
.progress-track { height: 10px; background: var(--panel-2); border-radius: 6px; overflow: hidden; }
.progress-bar {
  height: 100%;
  width: 0%;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--accent), #8be1ff);
  background-size: 200% 100%;
  transition: width .2s ease;
}
.progress.indeterminate .progress-bar {
  width: 35% !important;
  animation: progress-slide 1.1s ease-in-out infinite, progress-shimmer 1.6s linear infinite;
}
@keyframes progress-slide { 0% { margin-left: -35%; } 100% { margin-left: 100%; } }
@keyframes progress-shimmer { 0% { background-position: 0% 0; } 100% { background-position: 200% 0; } }

.result-grid { display: grid; grid-template-columns: 1fr 340px; gap: 1.2rem; margin-top: 1.4rem; }
@media (max-width: 900px) { .result-grid { grid-template-columns: 1fr; } }

.chart-card, .summary-card, .fits-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.2rem;
}
.fits-card { margin-top: 1.2rem; }
#chart { width: 100%; height: 480px; }

.summary-card h2 { margin: .2rem 0 .2rem; font-size: 1.05rem; }
.summary-card h3 { margin: 1.1rem 0 .4rem; font-size: .95rem; color: var(--muted); }
.summary-card .units { margin: 0 0 .6rem; color: var(--muted); font-size: .8rem; }

table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.hc-table td { padding: .35rem .2rem; border-bottom: 1px solid var(--border); }
.hc-table td:first-child { color: var(--muted); }
.hc-table td:nth-child(2) { font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
.hc-table td:nth-child(3) { color: var(--muted); text-align: right; font-size: .78rem; }
.hc-table tr.hc5 td { color: var(--accent-2); }

.fits-table th, .fits-table td { padding: .45rem .6rem; text-align: right; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums; }
.fits-table th { color: var(--muted); font-weight: 600; text-align: right; }
.fits-table th:first-child, .fits-table td:first-child { text-align: left; }
.fits-table tr.best td { color: var(--ok); }

.warnings { margin-top: .8rem; }
.warnings .warn { background: rgba(255,209,102,.1); border-left: 3px solid var(--accent-2); padding: .5rem .7rem; border-radius: 4px; margin-bottom: .5rem; font-size: .82rem; }

.composition { display: flex; flex-wrap: wrap; gap: .4rem; }
.composition .chip { background: var(--panel-2); border: 1px solid var(--border); border-radius: 20px; padding: .25rem .7rem; font-size: .8rem; }
.composition .chip b { color: var(--accent); }

.note { color: var(--muted); font-size: .8rem; margin-top: .8rem; }
code { background: var(--panel-2); padding: .1rem .35rem; border-radius: 4px; font-size: .85em; }