/* Tokens: licht en donker op één plek (dataviz-referentiepalet). */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #6b6a66;
  --axis: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --s1: #2a78d6;
  /* Hartslagzones: ordinale blauwe schaal, licht -> donker (gevalideerd). */
  --z1: #86b6ef; --z2: #5598e7; --z3: #2a78d6; --z4: #1c5cab; --z5: #104281;
  --critical: #d03b3b;
  --good-text: #006300;
  --warn: #fab219;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --text: #f0efec;
    --text-2: #c3c2b7;
    --muted: #a3a29b;
    --axis: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --s1: #3987e5;
    /* Donker: lage intensiteit dicht bij het oppervlak, hoge intensiteit licht. */
    --z1: #184f95; --z2: #3987e5; --z3: #6da7ec; --z4: #9ec5f4; --z5: #cde2fb;
    --good-text: #0ca30c;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d; --surface: #1a1a19; --text: #f0efec; --text-2: #c3c2b7; --muted: #a3a29b;
  --axis: #898781; --grid: #2c2c2a; --baseline: #383835; --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5; --s1: #3987e5;
  --z1: #184f95; --z2: #3987e5; --z3: #6da7ec; --z4: #9ec5f4; --z5: #cde2fb;
  --good-text: #0ca30c;
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--page); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--accent); }
h1 { font-size: 1.5rem; margin: 0 0 .75rem; }
h2 { font-size: 1.05rem; margin: 0 0 .15rem; }
.muted { color: var(--muted); }
main { max-width: 1100px; margin: 0 auto; padding: 16px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 650; color: var(--text); text-decoration: none; }
.topbar nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.topbar nav a { color: var(--text-2); text-decoration: none; }
.topbar nav a:hover { color: var(--text); }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; margin-bottom: 16px; min-width: 0;
}
.card.narrow { max-width: 420px; margin: 48px auto; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid2 > .card { margin-bottom: 16px; }
@media (max-width: 800px) { .grid2 { grid-template-columns: 1fr; gap: 0; } }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-bottom: 16px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.card .tile { border-color: var(--border); }
.tile .label { color: var(--text-2); font-size: .85rem; }
.tile .value { font-size: 1.6rem; font-weight: 600; }
.tile .sub { color: var(--muted); font-size: .8rem; }

.statusbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; font-size: .9rem; }

form.stack { display: grid; gap: 12px; }
form.inline { display: inline; margin: 0; }
label { display: grid; gap: 4px; color: var(--text-2); font-size: .9rem; }
input {
  font: inherit; padding: 8px 10px; border-radius: 6px; border: 1px solid var(--baseline);
  background: var(--page); color: var(--text);
}
button {
  font: inherit; padding: 8px 14px; border-radius: 6px; border: 0; cursor: pointer;
  background: var(--accent); color: #fff; font-weight: 600;
}
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--baseline); }
button.link { background: none; border: 0; padding: 0; color: var(--text-2); font-weight: 400; }
button:disabled { opacity: .5; cursor: default; }
.alert { background: color-mix(in srgb, var(--critical) 12%, transparent); border-radius: 6px; padding: 8px 10px; }
.alert-text { color: var(--critical); }
.ok { color: var(--good-text); }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th { text-align: left; color: var(--text-2); font-weight: 500; border-bottom: 1px solid var(--grid); padding: 6px 8px; }
td { padding: 6px 8px; border-bottom: 1px solid var(--grid); }
table.num td, table.num th, td.num { text-align: right; font-variant-numeric: tabular-nums; }
table.num td:first-child, table.num th:first-child, table.num .left { text-align: left; }
table.runs td.left { max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card { overflow-x: auto; }
details { margin-top: 8px; }
summary { cursor: pointer; color: var(--text-2); font-size: .85rem; }
.pager { display: flex; gap: 16px; justify-content: center; margin-top: 12px; }
.badge { font-size: .8rem; padding: 2px 8px; border-radius: 99px; border: 1px solid var(--border); color: var(--text-2); }
.badge.warn { border-color: var(--warn); color: var(--text); }
.description { white-space: pre-line; color: var(--text-2); }

/* Grafieken */
svg.chart { width: 100%; height: auto; display: block; margin-top: 8px; }
.chart .grid { stroke: var(--grid); stroke-width: 1; }
.chart .baseline { stroke: var(--baseline); stroke-width: 1; }
.chart .tick { fill: var(--axis); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .value { fill: var(--text); font-size: 12px; font-weight: 600; }
.chart .bar.s1, .chart .dot.s1 { fill: var(--s1); }
.chart .dot { stroke: var(--surface); stroke-width: 2; }
.chart .line { fill: none; stroke: var(--s1); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .hitarea { fill: transparent; }
.chart .hit { outline: none; cursor: default; }
.chart .hit:hover .bar, .chart .hit:focus .bar, .chart .hit:hover .seg, .chart .hit:focus .seg,
.chart .hit:hover .dot, .chart .hit:focus .dot { opacity: .8; }
.chart .hit:focus-visible .hitarea { stroke: var(--accent); stroke-width: 1; }
.seg.z1, .swatch.z1 { fill: var(--z1); background: var(--z1); }
.seg.z2, .swatch.z2 { fill: var(--z2); background: var(--z2); }
.seg.z3, .swatch.z3 { fill: var(--z3); background: var(--z3); }
.seg.z4, .swatch.z4 { fill: var(--z4); background: var(--z4); }
.seg.z5, .swatch.z5 { fill: var(--z5); background: var(--z5); }
.legend { list-style: none; display: flex; gap: 14px; padding: 0; margin: 8px 0 0; font-size: .85rem; color: var(--text-2); flex-wrap: wrap; }
.legend li { display: flex; align-items: center; gap: 6px; }
.swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.zonebar { display: flex; gap: 2px; height: 18px; margin-top: 8px; }
.zonebar .seg { display: block; height: 100%; }
.zonebar .seg:first-child { border-radius: 4px 0 0 4px; }
.zonebar .seg:last-child { border-radius: 0 4px 4px 0; }

#tooltip {
  position: fixed; z-index: 10; pointer-events: none; padding: 6px 10px; border-radius: 6px;
  background: var(--surface); color: var(--text); border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, .15); font-size: .85rem; max-width: 260px;
}
#tooltip strong { display: block; }
#tooltip span { color: var(--text-2); }

/* Schema's */
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
a.button { display: inline-block; padding: 8px 14px; border-radius: 6px; background: var(--accent); color: #fff;
  font-weight: 600; text-decoration: none; }
fieldset { border: 1px solid var(--border); border-radius: 8px; padding: 12px; display: grid; gap: 12px; }
legend { color: var(--text-2); padding: 0 4px; }
select { font: inherit; padding: 8px 10px; border-radius: 6px; border: 1px solid var(--baseline);
  background: var(--page); color: var(--text); }
.cols3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.days { display: flex; flex-wrap: wrap; gap: 8px 16px; }
label.check { display: flex; align-items: center; gap: 6px; color: var(--text); }
.inline-label { display: inline-flex; align-items: center; gap: 8px; }
.small { font-size: .85rem; }
.form-card { max-width: 760px; margin: 0 auto 16px; }
.notes { margin: 8px 0; padding-left: 18px; color: var(--text-2); }
.actions { margin-top: 12px; }
button.danger { color: var(--critical); }
.badge.active { border-color: var(--accent); color: var(--text); }
.badge.error { border-color: var(--critical); color: var(--critical); }
.week.current { border-color: var(--accent); }
ol.sessions { list-style: none; padding: 0; margin: 8px 0 0; }
.session { display: grid; grid-template-columns: 76px 1fr; gap: 8px; padding: 8px 0; border-top: 1px solid var(--grid); }
.session.past { opacity: .55; }
.session.race strong { color: var(--accent); }
.session .when { color: var(--text-2); font-variant-numeric: tabular-nums; }
.session details { margin-top: 4px; }
.session details ul { margin: 4px 0; padding-left: 18px; }
.badge[class*="type-"] { font-size: .75rem; }
table.upcoming td { border-bottom: 1px solid var(--grid); }

/* Coach */
.md { line-height: 1.6; }
.md h1, .md h2, .md h3 { font-size: 1rem; margin: 1rem 0 .25rem; }
.md ul, .md ol { padding-left: 20px; }
.md table { margin: 8px 0; }
.md code { background: var(--page); padding: 1px 4px; border-radius: 4px; }
.proposal { border-color: var(--warn); }

/* Gepland vs. gelopen */
.chart .target { stroke: var(--text-2); stroke-width: 2; stroke-linecap: round; }
.chart .bar.current { opacity: .75; }
.legend .line-key { width: 14px; height: 0; border-top: 2px solid var(--text-2); display: inline-block; }
.status { font-size: .75rem; padding: 1px 7px; border-radius: 99px; border: 1px solid var(--border); white-space: nowrap; }
.status.gedaan { color: var(--good-text); border-color: var(--good-text); }
.status.afwijkend { color: var(--text); border-color: var(--warn); }
.status.gemist { color: var(--critical); border-color: var(--critical); }
.status.vandaag { color: var(--accent); border-color: var(--accent); }
.status.gepland, .status.geen_loop { color: var(--muted); }
.actual { color: var(--text-2); font-size: .85rem; }
.weekbar { display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; }
.extra { color: var(--text-2); font-size: .85rem; margin-top: 6px; }