/* Theme tokens: light on :root, dark for the system preference (unless light is forced) and for the explicit choice */
:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --control: #fafafa;
  --text: #222;
  --muted: #666;
  --border: #ddd;
  --code: #f0f0f0;
  --stat: #3a6ea5;
  --mov: #e07b1a;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --accent: #eb6834;
  --ramp-1: #cde2fb;
  --ramp-2: #9ec5f4;
  --ramp-3: #5598e7;
  --ramp-4: #2a78d6;
  --ramp-5: #184f95;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b1d22;
    --panel: #23262d;
    --control: #2c3038;
    --text: #e6e6e6;
    --muted: #a0a3aa;
    --border: #3a3d45;
    --code: #30343c;
    --grid: #2c2c2a;
    --axis: #383835;
    --accent: #d95926;
    --ramp-1: #184f95;
    --ramp-2: #256abf;
    --ramp-3: #3987e5;
    --ramp-4: #6da7ec;
    --ramp-5: #b7d3f6;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #1b1d22;
  --panel: #23262d;
  --control: #2c3038;
  --text: #e6e6e6;
  --muted: #a0a3aa;
  --border: #3a3d45;
  --code: #30343c;
  --grid: #2c2c2a;
  --axis: #383835;
  --accent: #d95926;
  --ramp-1: #184f95;
  --ramp-2: #256abf;
  --ramp-3: #3987e5;
  --ramp-4: #6da7ec;
  --ramp-5: #b7d3f6;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
}

body { display: flex; }

#panel {
  width: 340px;
  flex: 0 0 340px;
  height: 100%;
  overflow-y: auto;
  padding: 16px 18px 24px;
  background: var(--panel);
  border-right: 1px solid var(--border);
}

#view { flex: 1 1 auto; height: 100%; min-width: 0; position: relative; }

#graphBox { position: absolute; inset: 0; }
#graphBox canvas { display: block; }

h1 { font-size: 20px; margin: 0 0 8px; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 18px 0 6px; }
.intro { margin: 0; line-height: 1.45; }


label { display: block; margin: 10px 0 4px; }

input[type=range] { width: 100%; height: 44px; margin: 0; cursor: pointer; }
input[type=number], select {
  min-height: 44px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--control);
  color: var(--text);
  font: inherit;
}
input[type=number] { width: 80px; }

.row { display: flex; gap: 8px; align-items: center; }
.row input[type=range] { flex: 1 1 auto; }

.note { color: var(--muted); font-size: 12px; line-height: 1.4; margin: 6px 0 0; }

.buttons { display: flex; gap: 6px; }
.buttons.stack { flex-direction: column; }
.buttons button {
  flex: 1 1 0;
  min-height: 44px;
  padding: 6px 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--control);
  color: var(--text);
  cursor: pointer;
  font: inherit;
}
.buttons button.active { background: var(--stat); color: #fff; border-color: var(--stat); }

:focus-visible { outline: 2px solid var(--mov); outline-offset: 2px; }

#readout { width: 100%; border-collapse: collapse; }
#readout th { text-align: left; font-weight: normal; color: var(--muted); width: 70%; }
#readout td { text-align: right; font-variant-numeric: tabular-nums; }
#readout th, #readout td { padding: 6px 2px; border-bottom: 1px solid var(--border); }

.legend { list-style: none; margin: 0; padding: 0; }
.legend li { display: flex; align-items: center; gap: 8px; margin: 4px 0; }
.sw { flex: 0 0 auto; display: inline-block; width: 18px; height: 12px; border-radius: 2px; }
.sw-node { background: var(--ramp-4); border-radius: 6px; }
.sw-edge { height: 2px; background: var(--ramp-4); }
.sw-hollow { border: 1px solid var(--muted); border-radius: 6px; }
.sw-accent { background: var(--accent); border-radius: 6px; }
.sw-compare { height: 0; border-top: 2px solid var(--accent); }

code { background: var(--code); padding: 1px 4px; border-radius: 3px; }

#tooltip {
  position: absolute;
  pointer-events: none;
  max-width: 260px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-size: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .15);
}
#tooltip b { display: block; margin-bottom: 4px; }
#tooltip div { display: flex; justify-content: space-between; gap: 12px; }
#tooltip div span:first-child { color: var(--muted); }
#tooltip div span:last-child { font-variant-numeric: tabular-nums; }

#tableBox { position: absolute; inset: 0; overflow: auto; padding: 16px; }
#table { border-collapse: collapse; min-width: 100%; }
#table caption { text-align: left; font-weight: bold; padding: 0 0 8px; }
#table th, #table td { padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
#table th { color: var(--muted); font-weight: normal; }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (max-width: 760px) {
  body { flex-direction: column; }
  #panel { width: 100%; flex: 0 0 auto; height: auto; max-height: 50%; border-right: 0; border-bottom: 1px solid var(--border); }
  #view { height: 50%; }
}