/* Layout: a race-pack booklet. One reading column; the canal map is the centrepiece, full width of the column.
   Canal-teal accent, towpath sand neutrals, mile-marker labels in mono. */
:root {
  --bg: #f4f6f3;
  --surface: #ffffff;
  --ink: #17262a;
  --muted: #56676b;
  --line: #d6dfdc;
  --accent: #0f6b74;
  --accent-soft: #dcefef;
  --water: #bcdcdf;
  --land: #eef2ea;
  --grey-mark: #a9b6b5;
  --grey-dark: #6f7f80;
  --s-plan: #0f6b74;
  --s-ref: #7b8889;
  --s-hard: #c0612b;
  --s-hold: #2f7d4f;
  --s-tweak: #6a4fb0;
  --good: #2f7d4f;
  --warn: #b26a12;
  --bad: #b23a2e;
  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1719; --surface: #162124; --ink: #e3ecea; --muted: #9db0ae; --line: #2a3a3d;
    --accent: #5cc3c9; --accent-soft: #173a3d; --water: #1f4a50; --land: #132024; --grey-mark: #5d6f70; --grey-dark: #8fa1a2;
    --s-plan: #5cc3c9; --s-ref: #9aa9aa; --s-hard: #e8935e; --s-hold: #6cc48e; --s-tweak: #ab95ef;
    --good: #6cc48e; --warn: #e3a54f; --bad: #ef8a7d; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1719; --surface: #162124; --ink: #e3ecea; --muted: #9db0ae; --line: #2a3a3d;
  --accent: #5cc3c9; --accent-soft: #173a3d; --water: #1f4a50; --land: #132024; --grey-mark: #5d6f70; --grey-dark: #8fa1a2;
  --s-plan: #5cc3c9; --s-ref: #9aa9aa; --s-hard: #e8935e; --s-hold: #6cc48e; --s-tweak: #ab95ef;
  --good: #6cc48e; --warn: #e3a54f; --bad: #ef8a7d; color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 400 16px/1.6 var(--font-body); }
.wrap { max-width: 1040px; margin: 0 auto; padding-inline: 20px; padding-block: 28px 64px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 36px; }
.narrow { max-width: 760px; }
a { color: var(--accent); }
img { max-width: 100%; }
header.top { display: flex; flex-wrap: wrap; gap: 18px 28px; align-items: center; }
header.top .txt { flex: 1 1 380px; min-width: 0; display: grid; gap: 8px; }
header.top img { width: 180px; flex: 0 0 auto; }
.eyebrow { font: 600 13px/1.3 var(--font-display); letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
h1 { font: 700 clamp(34px, 6.5vw, 58px)/1 var(--font-display); margin: 0; text-wrap: balance; }
h2 { font: 600 30px/1.15 var(--font-display); margin: 0 0 12px; text-wrap: balance; }
h3 { font: 600 21px/1.2 var(--font-display); margin: 24px 0 8px; }
p { margin: 0 0 14px; max-width: 70ch; }
.lead { font-size: 18px; }
.meta, .note { color: var(--muted); font-size: 14px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 16px; min-width: 0; }
.tbl { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { padding: 7px 11px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 600 13px/1.2 var(--font-display); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tr.hl td { background: var(--accent-soft); }
td.n, th.n { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.mile { display: inline-block; min-width: 36px; padding: 0 5px; margin-right: 6px; border: 1px solid var(--ink); border-radius: 3px; font: 500 12px/1.5 var(--font-mono); text-align: center; }
.formula { font: 500 14px/1.6 var(--font-mono); background: var(--accent-soft); border-radius: 4px; padding: 8px 12px; overflow-x: auto; white-space: nowrap; margin: 6px 0 12px; }
.btn { font: 600 15px/1 var(--font-display); letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px; border-radius: 4px; border: 1px solid var(--accent); background: var(--accent); color: var(--surface); cursor: pointer; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn:focus-visible, select:focus-visible, input:focus-visible, .chip:focus-visible, .seg button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
footer { font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; display: grid; gap: 6px; }
@media (max-width: 520px) { .wrap { padding-inline: 16px; } header.top img { width: 120px; } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }