:root {
  --bg: #fafafa;
  --fg: #ffffff;
  --fg2: #18181b;
  --panel: #ffffff;
  --panel-soft: #f4f4f5;
  --ink: #18181b;
  --muted: #71717a;
  --accent: #10b981;
  --accent-2: #52525b;
  --border: #e4e4e7;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.06);
}

h1, h2, h3{
  font-family: "Bebas Neue", system-ui, sans-serif;
  font-weight: 400;
  letter-spacing: .5px;
  line-height: 1.05;
}

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.app { display: flex; flex-direction: column; min-height: 100vh; padding-bottom: 12px; }

.controls {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 20px clamp(16px,4vw,32px) 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow);
}

.controls-header { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 16px; }
.controls-title h1 { margin: 0; font-size: 28px; font-weight: 800; color: var(--ink); font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif; letter-spacing: -.4px; }
.controls-title h1 span.accent { color: var(--accent); }
.control-muted { margin: 6px 0 0; font-size: 12px; color: var(--muted); max-width: 640px; }

.controls-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

@media (min-width: 1280px) {
  .controls-grid { grid-template-columns: repeat(5, 1fr); }
}

@media (min-width: 960px) and (max-width: 1279px) {
  .controls-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 640px) and (max-width: 959px) {
  .controls-grid { grid-template-columns: repeat(3, 1fr); }
}

.control-card { min-width: 0; }

.control-card {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,.05);
}

.control-card h2 {
  margin: 0;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  font-weight: 700;
}

.control-card {
  display: flex;
  flex-direction: column;
  height: var(--card-fixed-height, auto);
}

.tiny-note {
  margin-top: 6px;
  font-size: 11px;
  color: var(--muted);
}

.control-card .card-title,
.control-card > h2 {
  flex: 0 0 auto;
}

.control-card .card-scroll {
  flex: 1 1 auto;
  overflow: auto;
  min-height: 0;
}

#spectraList {
  max-height: none;
}

.control-card[data-card="visibility"] .chips {
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.modebar-btn.modebar-btn--active {
  background: rgba(16, 185, 129, 0.12);
  box-shadow: inset 0 0 0 1px #10b981;
}

.control-card, .control-card * { box-sizing: border-box; }

#cardSpectra .card-title { flex: 0 0 auto; }
#cardSpectra #search { flex: 0 0 auto; }

#cardSpectra #spectraList {
  flex: 1 1 auto;
  overflow: auto;
  min-height: 0;
  max-height: none;
}

#activePlotTypes {
  flex: 1 1 auto !important;
  overflow: auto !important;
  min-height: 40px !important;
  max-height: none !important;
}

#cardLines,
.control-card[data-expandable="true"] {
  transition: all 0.3s ease;
  position: relative;
}

#cardPlot.plot-controls-disabled { opacity: 0.82; }

#cardPlot.plot-controls-disabled button,
#cardPlot.plot-controls-disabled input,
#cardPlot.plot-controls-disabled select,
#cardPlot.plot-controls-disabled textarea {
  cursor: not-allowed;
}

#cardLines.has-overflow:hover,
.control-card[data-expandable="true"].has-overflow:hover {
  transform: scale(1);
  height: var(--expand-height) !important;
  max-height: var(--expand-height) !important;
  z-index: 100;
  box-shadow: 0 12px 40px rgba(0,0,0,.12), 0 4px 16px rgba(0,0,0,.08);
}

#cardLines, #cardLines * { box-sizing: border-box; }
#cardLines { display: flex; flex-direction: column; }

#cardLines .lines-list {
  flex: 1 1 auto;
  overflow: auto;
  min-height: 0;
  font-size: 11px;
}

#cardLines .lines-list.empty {
  color: var(--muted);
  font-style: italic;
}

#cardLines .line-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 6px;
  margin-bottom: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  transition: all 0.2s ease;
}

#cardLines .line-item:hover {
  background: var(--fg);
  box-shadow: 0 2px 6px rgba(0,0,0,.08);
}

#cardLines .line-tag {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.01em;
}

#cardLines .remove-line {
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  font-size: 10px;
  padding: 2px 5px;
  border-radius: 5px;
  line-height: 1;
  min-width: 18px;
  min-height: 18px;
  transition: all 0.2s ease;
}

#cardLines .remove-line:hover {
  background: rgba(239,68,68,.08);
  border-color: #ef4444;
  color: #ef4444;
}

#btnDownloadLines { width: 100%; margin-top: 10px; }

.card-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

input, button, select {
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px 10px;
  font-size: 13px;
}
select { cursor: pointer; }

input[type='file'] { padding: 6px; }
input[type='color'] { padding: 0; width: 28px; height: 28px; border-radius: 6px; }
input[type='checkbox'] { width: 16px; height: 16px; accent-color: var(--accent); }
input[type='number'] { width: 90px; }

.color-picker-btn { width: 32px; height: 28px; border-radius: 6px; cursor: pointer; }
.pcr-app { z-index: 10000; }
.pcr-button { width: 32px; height: 28px; border-radius: 6px; border: 1px solid var(--border); }
.pcr-button:after { border-radius: 6px; }

/* Override inline-style backgrounds on selects inside the custom plot form */
#customPlotForm select,
#customPlotForm { background: var(--panel-soft); color: var(--muted); }

button { cursor: pointer; transition: all 0.2s ease; }
button:hover { transform: translateY(-1px); box-shadow: 0 2px 8px rgba(0,0,0,.10); }

button.primary { background: var(--accent); border-color: #059669; color: #fff; font-weight: 600; }
button.primary:hover { background: #059669; }

button.ghost { background: var(--panel); border-color: var(--border); color: var(--ink); }
button.ghost:hover { background: var(--panel-soft); box-shadow: 0 2px 6px rgba(0,0,0,.08); }

.small { font-size: 12px; color: var(--muted); margin: 0; }

#spectraList { display: flex; flex-direction: column; gap: 6px; max-height: 120px; overflow: auto; padding-right: 6px; }

.spec-item {
  display: grid;
  grid-template-columns: 1fr 32px 28px;
  gap: 8px;
  align-items: center;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  transition: all 0.2s ease;
}
.spec-item:hover { background: var(--fg); box-shadow: 0 2px 6px rgba(0,0,0,.08); }

.spec-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }

.delete-spec {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 20px;
  line-height: 1;
  padding: 0;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.delete-spec:hover { background: rgba(239,68,68,.08); color: #ef4444; transform: none; box-shadow: none; }

.chips { display: flex; gap: 8px; flex-wrap: wrap; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--border);
  font-size: 12px;
  transition: all 0.2s ease;
}
.pill:hover { background: var(--panel-soft); box-shadow: 0 2px 6px rgba(0,0,0,.08); }

.status-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}
.status-line.loading::before {
  content: '';
  width: 12px;
  height: 12px;
  border: 2px solid var(--accent);
  border-bottom-color: transparent;
  border-radius: 50%;
  display: inline-block;
  animation: spin .7s linear infinite;
}
@keyframes spin { from { transform: rotate(0) } to { transform: rotate(360deg) } }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s ease;
}
.back-link:hover {
  background: var(--panel-soft);
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
  transform: translateY(-1px);
}

.plot-area {
  flex: 1;
  position: relative;
  background: var(--bg);
  min-height: 0;
  display: flex;
  padding: 20px;
}

#plotWrap.dragover::after {
  content: 'Drop CSV or ZIP files to load spectra';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  background: rgba(16,185,129,.08);
  color: var(--accent);
  border: 2px dashed var(--accent);
  border-radius: 12px;
  pointer-events: none;
}

#graph {
  flex: 1;
  width: 100%;
  min-height: 460px;
  background: var(--panel);
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

@media (max-width: 960px) {
  .controls { padding: 18px 16px 22px }
  .controls-header h1 { font-size: 21px }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090b;
    --fg: #18181b;
    --fg2: #f4f4f5;
    --panel: #18181b;
    --panel-soft: #27272a;
    --ink: #f4f4f5;
    --muted: #a1a1aa;
    --accent: #34d399;
    --accent-2: #a1a1aa;
    --border: #3f3f46;
    --shadow: 0 1px 3px rgba(0,0,0,.2), 0 4px 16px rgba(0,0,0,.25);
  }

  html, body { background: var(--bg); }

  .controls { background: var(--panel); }
  .control-card { background: var(--panel-soft); }

  input, button, select { background: var(--panel); color: var(--muted); border-color: var(--border); }
  button.ghost { background: var(--panel); color: var(--ink); }
  #customPlotForm select, #customPlotForm { background: var(--panel-soft); }
  button.primary { background: var(--accent); border-color: #059669; color: #052e16; }
  button.primary:hover { background: #059669; }

  .spec-item { background: var(--panel); }
  .spec-item:hover { background: var(--panel-soft); }

  .pill { background: var(--panel); }
  .pill:hover { background: var(--panel-soft); }

  .status-line { background: var(--panel); }
  .back-link { background: var(--panel); color: var(--ink); }
  .back-link:hover { background: var(--panel-soft); }

  #graph { background: var(--panel); }

  #cardLines .line-item { background: var(--panel); }
  #cardLines .line-item:hover { background: var(--panel-soft); }
}