/* styles.css — a light, print-like page around one diagram and one detail panel.
 *
 * Nothing here is domain-specific except the wording, so copy it and change the palette if
 * you must. Keep it light: values are coloured terracotta (positive) and slate (negative) on
 * warm paper, and that contrast is what makes a heatmap readable.
 */

:root {
  --paper: #f6f4ee;
  --paper-raised: #fffdf7;
  --ink: #2f2b26;
  --ink-soft: #5c574f;
  --ink-faint: #8b857a;
  --line: rgba(90, 82, 70, 0.2);
  --line-strong: rgba(90, 82, 70, 0.4);
  --accent: #c2622d;
  --accent-soft: #f0dccb;
  --slate: #3e5c6b;
  --good: #5e7a52;
  --serif: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
}

button {
  font: inherit;
  font-size: 14px;
  padding: 7px 14px;
  border-radius: 6px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button.ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
button:hover { filter: brightness(1.05); }
button:focus-visible, input:focus-visible, .node:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ------------------------------------------------------------------ header */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 30px; height: 30px;
  border-radius: 6px;
  background:
    linear-gradient(90deg, var(--slate) 0 25%, var(--paper) 25% 50%, var(--accent-soft) 50% 75%, var(--accent) 75%);
  border: 1px solid var(--line-strong);
}
.brand h1 { margin: 0; font-family: var(--serif); font-size: 22px; line-height: 1.1; }
.brand p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.top-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ------------------------------------------------------------------ controls */

.controls { padding: 14px 20px 6px; display: flex; flex-direction: column; gap: 10px; }
.input-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.input-label { font-weight: 600; font-size: 13px; }
#input {
  flex: 1 1 280px;
  min-width: 0;
  font: inherit;
  font-family: var(--mono);
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper-raised);
  color: var(--ink);
}
.vocab-row { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.hint { font-size: 12px; color: var(--ink-faint); }
.vocab { display: flex; flex-wrap: wrap; gap: 4px; }
.word {
  font-family: var(--mono);
  font-size: 12px;
  padding: 2px 7px;
  background: var(--paper-raised);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
}
.settings-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.sliders { display: flex; gap: 18px; flex-wrap: wrap; }
.slider { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.slider-name { font-weight: 600; }
.slider input { width: 140px; accent-color: var(--accent); }
.slider-value { font-family: var(--mono); min-width: 3ch; }
.output { margin: 0; font-size: 14px; }
.output strong { font-family: var(--mono); }
.output .accent { color: var(--accent); }
.output .sep { color: var(--ink-faint); margin: 0 6px; }
.output .note { display: block; font-size: 12px; color: var(--ink-faint); }

/* ------------------------------------------------------------------ diagram */

main { padding: 6px 20px 28px; }
.diagram-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-raised);
}
#diagram { display: block; margin: 0 auto; }

.edge { fill: none; stroke: var(--ink-faint); stroke-opacity: 0.45; }
.edge.skip { stroke-dasharray: 4 4; stroke-width: 1; stroke-opacity: 0.6; }
.skip-label { font-size: 10px; fill: var(--ink-faint); }
.edge.flowing { stroke-dasharray: 5 7; animation: flow 1.2s linear 1; }
@keyframes flow { from { stroke-dashoffset: 48; } to { stroke-dashoffset: 0; } }

.has-hover .edge { stroke-opacity: 0.15; }
.has-hover .edge.lit { stroke: var(--accent); stroke-opacity: 0.9; }

.node { cursor: pointer; }
.box { fill: var(--paper); stroke: var(--line-strong); stroke-width: 1; }
.node:hover .box { stroke: var(--ink-soft); }
.node.selected .box { stroke: var(--accent); stroke-width: 2; fill: #fff; }
.box-label { font-size: 11px; font-weight: 600; fill: var(--ink); }

.cell { stroke: none; }
.cell.masked { fill: none; stroke: var(--line); stroke-width: 0.5; stroke-dasharray: 1 1.5; }
.row-hit { fill: transparent; stroke: none; }
.row.lit .row-hit { stroke: var(--accent); stroke-width: 1.5; }
.chip { fill: var(--paper-raised); stroke: var(--line-strong); }
.row.lit .chip { stroke: var(--accent); stroke-width: 1.5; }
.chip-text { font-family: var(--mono); font-size: 11px; fill: var(--ink); }
.chip-sub { font-family: var(--mono); font-size: 9px; fill: var(--ink-faint); }
.bar { fill: var(--ink-faint); }
.bar.marked { fill: var(--accent); }
.bar.neg { fill: var(--slate); }
.bar-label { font-family: var(--mono); font-size: 10px; fill: var(--ink-soft); }
.bar-label.marked { fill: var(--accent); font-weight: 700; }

/* ------------------------------------------------------------------ detail */

.detail {
  margin-top: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-raised);
  max-width: 1100px;
}
.detail-empty { margin: 0; color: var(--ink-soft); }
.eyebrow { margin: 0; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.detail h2 { margin: 2px 0 8px; font-family: var(--serif); font-size: 22px; }
.detail-body { margin: 0 0 8px; max-width: 70ch; }
.formula { font-family: var(--mono); font-size: 13px; background: var(--paper); border: 1px solid var(--line); border-radius: 4px; padding: 6px 10px; display: inline-block; margin: 0 0 8px; }
.try { margin: 0 0 12px; font-size: 13px; color: var(--ink-soft); font-style: italic; }
.check { font-size: 12px; color: var(--good); margin: 6px 0 0; }

.table-scroll { overflow-x: auto; }
.grid { border-collapse: collapse; font-family: var(--mono); font-size: 11px; }
.grid th { font-weight: 600; color: var(--ink-soft); padding: 3px 6px; text-align: right; white-space: nowrap; }
.grid thead th { text-align: center; }
.grid td { min-width: 46px; padding: 4px 6px; text-align: right; border: 1px solid var(--paper-raised); color: var(--ink); }
.grid td.strong { color: #fff; }
.grid td.masked {
  background: repeating-linear-gradient(135deg, transparent 0 4px, var(--line) 4px 5px);
}
.grid tr.lit th { color: var(--accent); }
.grid tr.lit td { outline: 1px solid var(--accent); }

.view-items { display: flex; flex-wrap: wrap; gap: 6px; }
.item { display: flex; flex-direction: column; padding: 6px 10px; border: 1px solid var(--line-strong); border-radius: 6px; background: var(--paper); font-family: var(--mono); }
.item.lit { border-color: var(--accent); }
.item-label { font-size: 14px; }
.item-sub { font-size: 11px; color: var(--ink-faint); }

.view-bars { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; max-width: 640px; }
.view-bars li { display: grid; grid-template-columns: 8ch 1fr 7ch auto; gap: 10px; align-items: center; font-family: var(--mono); font-size: 12px; }
.view-bars li.marked .bar-name { color: var(--accent); font-weight: 700; }
.bar-track { position: relative; height: 12px; background: var(--paper); border-radius: 2px; }
.bar-track.centred::after { content: ""; position: absolute; left: 50%; top: -2px; bottom: -2px; width: 1px; background: var(--line-strong); }
.bar-fill { position: absolute; left: 0; top: 0; bottom: 0; background: var(--ink-faint); border-radius: 2px; }
.view-bars li.marked .bar-fill { background: var(--accent); }
.bar-fill.neg { background: var(--slate); }
.bar-part { position: absolute; top: 0; bottom: 0; }
.part-0 { background: var(--accent); }
.part-1 { background: var(--slate); }
.bar-value { text-align: right; }
.bar-mark { font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); }
.legend { font-size: 12px; color: var(--ink-soft); display: flex; align-items: center; gap: 6px; margin: 10px 0 0; }
.swatch { width: 12px; height: 10px; display: inline-block; border-radius: 2px; }

details.extra { margin-top: 12px; border-top: 1px solid var(--line); padding-top: 10px; }
details.extra summary { cursor: pointer; font-weight: 600; font-size: 13px; margin-bottom: 8px; }

/* ------------------------------------------------------------------ about */

dialog {
  max-width: 680px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--paper-raised);
  color: var(--ink);
  padding: 22px 26px;
}
dialog::backdrop { background: rgba(47, 43, 38, 0.35); }
dialog h2 { font-family: var(--serif); margin-top: 0; }
dialog h3 { font-size: 14px; margin: 16px 0 4px; }
dialog p { margin: 0 0 6px; }
dialog code { font-family: var(--mono); font-size: 13px; }

@media (max-width: 640px) {
  .topbar, .controls, main { padding-left: 16px; padding-right: 16px; }
  .slider input { width: 110px; }
}