:root {
  --radius: 18px;
}

/* Dark theme (default) */
:root, [data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b0f17;
  --bg-gradient: radial-gradient(1200px 800px at 20% 0%, #1a2240 0%, #0b0f17 55%) fixed;
  --card: rgba(255,255,255,0.06);
  --card2: rgba(255,255,255,0.08);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.66);
  --line: rgba(255,255,255,0.10);
  --shadow: 0 10px 35px rgba(0,0,0,0.35);
  --btn-bg: rgba(255,255,255,0.10);
  --btn-hover: rgba(255,255,255,0.14);
  --btn-secondary: rgba(255,255,255,0.16);
  --pill-bg: rgba(0,0,0,0.15);
  --file-border: rgba(255,255,255,0.20);
  --file-bg: rgba(0,0,0,0.10);
  --kpi-bg: rgba(0,0,0,0.14);
  --thead-bg: rgba(0,0,0,0.22);
  --thead-color: rgba(255,255,255,0.80);
  --td-color: rgba(255,255,255,0.88);
  --tr-even: rgba(255,255,255,0.04);
  --tr-hover: rgba(255,255,255,0.08);
  --chart-bg: rgba(0,0,0,0.12);
  --modal-bg: linear-gradient(180deg, #1c2540, #131825);
  --modal-overlay: rgba(0,0,0,0.60);
  --code-bg: rgba(0,0,0,0.28);
  --error-border: rgba(255,120,120,0.35);
  --error-bg: rgba(255,80,80,0.10);
  --error-text: rgba(220,220,220,0.95);
  --bar-fill-start: rgba(96,165,250,0.65);
  --bar-fill-end: rgba(96,165,250,0.15);
  --bar-stroke: rgba(96,165,250,0.35);
  --chart-text: rgba(255,255,255,0.75);
  --chart-grid: rgba(255,255,255,0.10);
  --chart-label: rgba(255,255,255,0.70);
}

/* Light theme */
[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f6fa;
  --bg-gradient: radial-gradient(1200px 800px at 20% 0%, #e0e5f0 0%, #f5f6fa 55%) fixed;
  --card: rgba(255,255,255,0.85);
  --card2: rgba(255,255,255,0.95);
  --text: rgba(0,0,0,0.88);
  --muted: rgba(0,0,0,0.55);
  --line: rgba(0,0,0,0.10);
  --shadow: 0 10px 35px rgba(0,0,0,0.08);
  --btn-bg: rgba(0,0,0,0.06);
  --btn-hover: rgba(0,0,0,0.10);
  --btn-secondary: rgba(0,0,0,0.08);
  --pill-bg: rgba(0,0,0,0.04);
  --file-border: rgba(0,0,0,0.15);
  --file-bg: rgba(0,0,0,0.03);
  --kpi-bg: rgba(0,0,0,0.03);
  --thead-bg: rgba(0,0,0,0.04);
  --thead-color: rgba(0,0,0,0.70);
  --td-color: rgba(0,0,0,0.80);
  --tr-even: rgba(0,0,0,0.02);
  --tr-hover: rgba(0,0,0,0.05);
  --chart-bg: rgba(0,0,0,0.03);
  --modal-bg: linear-gradient(180deg, #ffffff, #f0f1f5);
  --modal-overlay: rgba(0,0,0,0.30);
  --code-bg: rgba(0,0,0,0.05);
  --error-border: rgba(220,50,50,0.30);
  --error-bg: rgba(220,50,50,0.06);
  --error-text: rgba(180,30,30,0.90);
  --bar-fill-start: rgba(59,130,246,0.70);
  --bar-fill-end: rgba(59,130,246,0.15);
  --bar-stroke: rgba(59,130,246,0.40);
  --chart-text: rgba(0,0,0,0.65);
  --chart-grid: rgba(0,0,0,0.08);
  --chart-label: rgba(0,0,0,0.55);
}

/* System preference: apply light when no explicit theme set */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    color-scheme: light;
    --bg: #f5f6fa;
    --bg-gradient: radial-gradient(1200px 800px at 20% 0%, #e0e5f0 0%, #f5f6fa 55%) fixed;
    --card: rgba(255,255,255,0.85);
    --card2: rgba(255,255,255,0.95);
    --text: rgba(0,0,0,0.88);
    --muted: rgba(0,0,0,0.55);
    --line: rgba(0,0,0,0.10);
    --shadow: 0 10px 35px rgba(0,0,0,0.08);
    --btn-bg: rgba(0,0,0,0.06);
    --btn-hover: rgba(0,0,0,0.10);
    --btn-secondary: rgba(0,0,0,0.08);
    --pill-bg: rgba(0,0,0,0.04);
    --file-border: rgba(0,0,0,0.15);
    --file-bg: rgba(0,0,0,0.03);
    --kpi-bg: rgba(0,0,0,0.03);
    --thead-bg: rgba(0,0,0,0.04);
    --thead-color: rgba(0,0,0,0.70);
    --td-color: rgba(0,0,0,0.80);
    --tr-even: rgba(0,0,0,0.02);
    --tr-hover: rgba(0,0,0,0.05);
    --chart-bg: rgba(0,0,0,0.03);
    --modal-bg: linear-gradient(180deg, #ffffff, #f0f1f5);
    --modal-overlay: rgba(0,0,0,0.30);
    --code-bg: rgba(0,0,0,0.05);
    --error-border: rgba(220,50,50,0.30);
    --error-bg: rgba(220,50,50,0.06);
    --error-text: rgba(180,30,30,0.90);
    --bar-fill-start: rgba(59,130,246,0.70);
    --bar-fill-end: rgba(59,130,246,0.15);
    --bar-stroke: rgba(59,130,246,0.40);
    --chart-text: rgba(0,0,0,0.65);
    --chart-grid: rgba(0,0,0,0.08);
    --chart-label: rgba(0,0,0,0.55);
  }
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg-gradient);
  color: var(--text);
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 18px 40px;
}

.header {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 18px;
}

h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.02em;
}

.sub {
  margin: 8px 0 0;
  color: var(--muted);
}

.card {
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin: 14px 0;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid.two {
  grid-template-columns: 1fr;
}

@media (min-width: 840px) {
  .grid.two { grid-template-columns: 1fr 1fr; }
}

.inputs {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .inputs { grid-template-columns: 1fr 1fr; }
}

h2 {
  margin: 2px 0 12px;
  font-size: 16px;
  color: var(--text);
  letter-spacing: 0.01em;
}

.pill {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 8px 10px;
  border-radius: 999px;
  background: var(--pill-bg);
  white-space: nowrap;
}

.file {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px dashed var(--file-border);
  border-radius: 14px;
  background: var(--file-bg);
}

.file span {
  color: var(--muted);
  font-size: 12px;
}

input[type="file"] {
  width: 100%;
  color: var(--text);
}

.row {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

button {
  border: 1px solid var(--line);
  background: var(--btn-bg);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 14px;
  cursor: pointer;
}

button:hover { background: var(--btn-hover); }
button:active { transform: translateY(1px); }

button.secondary {
  background: var(--btn-secondary);
}

button.ghost {
  background: transparent;
}

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

.error {
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--error-border);
  background: var(--error-bg);
  color: var(--error-text);
  font-size: 13px;
  white-space: pre-wrap;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-header h2 {
  margin-bottom: 0;
}

.toggle-btn {
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-bottom: 12px;
}

.kpis {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 560px) {
  .kpis { grid-template-columns: 1fr 1fr; }
}

.kpi {
  padding: 12px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--kpi-bg);
}

.kpi .label {
  font-size: 12px;
  color: var(--muted);
}

.kpi .value {
  margin-top: 6px;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.mini {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.tableWrap {
  overflow: auto;
  border-radius: 14px;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

thead th {
  text-align: left;
  font-size: 12px;
  color: var(--thead-color);
  background: var(--thead-bg);
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--td-color);
  font-size: 13px;
}

tbody tr:nth-child(even) td {
  background: var(--tr-even);
}

tbody tr:hover td {
  background: var(--tr-hover);
}

tbody td.cell-min {
  color: #f87171;
  font-weight: 600;
}

tbody td.cell-max {
  color: #34d399;
  font-weight: 600;
}

.footer {
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.chartWrap {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--chart-bg);
  overflow: hidden;
}

canvas {
  width: 100%;
  height: 280px;
  display: block;
}

/* Help button */
.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.help-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--btn-bg);
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  flex-shrink: 0;
}

.help-btn:hover { background: var(--btn-hover); }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay[hidden] { display: none; }

.modal-box {
  position: relative;
  background: var(--modal-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(0,0,0,0.6);
  padding: 28px 32px 32px;
  width: min(560px, 92vw);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-box h2 {
  margin: 0 0 20px;
  font-size: 18px;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--btn-bg);
  color: var(--muted);
  cursor: pointer;
}

.modal-close:hover { background: var(--btn-hover); color: var(--text); }

.modal-section {
  margin-bottom: 22px;
}

.modal-section:last-child { margin-bottom: 0; }

.modal-filename {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.modal-code {
  margin: 0 0 8px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--code-bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  color: var(--td-color);
  line-height: 1.6;
  white-space: pre;
  overflow-x: auto;
}

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

/* Theme toggle */
.theme-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--btn-bg);
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  flex-shrink: 0;
  line-height: 1;
}

.theme-btn:hover { background: var(--btn-hover); }