/* One stylesheet, no build step. Colours follow plotting.py's palette so the PNGs
   and the page agree: surface #fcfcfb, text #0b0b0b, muted #52514e, grid #e3e2df,
   and the categorical blue #2a78d6 / red #eb6836 for injection and withdrawal. */
:root {
  --surface: #fcfcfb;
  --panel: #ffffff;
  --text: #0b0b0b;
  --muted: #52514e;
  --grid: #e3e2df;
  --inj: #2a78d6;
  --wit: #eb6836;
  --ok: #1c7c47;
  --bad: #b3261e;
  --radius: 6px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font: 14px/1.5 "Segoe UI", system-ui, -apple-system, sans-serif;
}
header { padding: 20px 24px 12px; border-bottom: 1px solid var(--grid); }
h1 { margin: 0; font-size: 20px; font-weight: 600; }
h2 { margin: 0; font-size: 15px; font-weight: 600; }
h3 { margin: 18px 0 6px; font-size: 13px; font-weight: 600; color: var(--muted);
     text-transform: uppercase; letter-spacing: .04em; }
.sub { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
main { padding: 16px 24px 48px; max-width: 1400px; }
code { background: #f0efec; padding: 1px 4px; border-radius: 3px; font-size: 12px; }

/* --- deal form --------------------------------------------------------- */
.deal { border: 1px solid var(--grid); border-radius: var(--radius);
        background: var(--panel); padding: 14px 16px; margin-bottom: 18px; }
.deal-head { display: flex; align-items: center; justify-content: space-between; }
.deal-actions { display: flex; gap: 8px; align-items: center; }
.grid { display: grid; gap: 14px; margin-top: 12px;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.tables { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
fieldset { border: 1px solid var(--grid); border-radius: var(--radius); padding: 10px 12px 12px; margin: 0; }
legend { font-size: 12px; font-weight: 600; color: var(--muted); padding: 0 4px; }
label { display: flex; align-items: center; justify-content: space-between;
        gap: 8px; margin: 6px 0; font-size: 13px; }
label.check { justify-content: flex-start; }
.unit { color: var(--muted); font-size: 11px; margin-left: auto; margin-right: 6px; }
input, select { font: inherit; font-size: 13px; padding: 3px 6px; min-width: 0;
                border: 1px solid var(--grid); border-radius: 4px; background: #fff; color: inherit; }
input[type=number], input[type=date] { width: 130px; text-align: right; }
input[type=checkbox] { width: auto; }
.curve { grid-column: 1 / -1; }

/* --- buttons ----------------------------------------------------------- */
button { font: inherit; font-size: 13px; padding: 5px 12px; cursor: pointer;
         border: 1px solid var(--grid); border-radius: 4px; background: #fff; color: inherit; }
button:hover { border-color: var(--muted); }
button.primary { background: var(--inj); border-color: var(--inj); color: #fff; font-weight: 500; }
button.primary:hover { filter: brightness(1.08); }
button.primary:disabled { opacity: .5; cursor: progress; }
button.ghost { color: var(--muted); }
.filebtn { position: relative; overflow: hidden; display: inline-block; cursor: pointer;
           border: 1px solid var(--grid); border-radius: 4px; padding: 5px 12px; font-size: 13px; }
.filebtn:hover { border-color: var(--muted); }
.filebtn input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.rowbtns { display: flex; gap: 6px; margin-top: 6px; }
.rowbtns button { padding: 2px 8px; font-size: 12px; }

/* --- tabs & panels ----------------------------------------------------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--grid); margin-bottom: 14px; }
.tab { border: none; border-bottom: 2px solid transparent; border-radius: 0;
       background: none; color: var(--muted); padding: 8px 14px; }
.tab.active { color: var(--text); border-bottom-color: var(--inj); font-weight: 600; }
.panel { display: none; }
.panel.active { display: block; }
.controls { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 12px; }
.controls label { margin: 0; }
.hint { color: var(--muted); font-size: 12px; }

/* --- results ----------------------------------------------------------- */
.tiles { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.tile { border: 1px solid var(--grid); border-radius: var(--radius); background: var(--panel);
        padding: 10px 16px; min-width: 150px; }
.tile .k { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.tile .v { font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; margin-top: 2px; }
.tile.good .v { color: var(--ok); }
.tile.bad .v { color: var(--bad); }

table { border-collapse: collapse; font-size: 12.5px; font-variant-numeric: tabular-nums; }
th, td { padding: 3px 8px; border-bottom: 1px solid var(--grid); text-align: right; white-space: nowrap; }
th { color: var(--muted); font-weight: 600; text-align: right; position: sticky; top: 0; background: var(--panel); }
td:first-child, th:first-child { text-align: left; }
.editable input { width: 108px; }
.editable td { padding: 2px 4px; border: none; }
.scroll { overflow-x: auto; max-width: 100%; border: 1px solid var(--grid);
          border-radius: var(--radius); background: var(--panel); padding: 4px 8px; }
.inj { color: var(--inj); }
.wit { color: var(--wit); }
.zero { color: #b8b7b3; }

figure { margin: 14px 0 0; }
figure img { max-width: 100%; height: auto; border: 1px solid var(--grid); border-radius: var(--radius); background: #fff; }
figcaption { color: var(--muted); font-size: 12px; margin-top: 4px; }
.figs { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); }

.status { color: var(--muted); font-size: 12px; min-height: 18px; margin: 8px 0 0; }
.status.err { color: var(--bad); }
.note { color: var(--muted); font-size: 12px; margin: 6px 0 0; }
.hidden { display: none; }
.slider { display: flex; align-items: center; gap: 10px; margin: 10px 0; }
.slider input[type=range] { width: 260px; }