/* Stroomtij - tokens from the validated data-viz palette (light/dark selected, not flipped). */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6f6d68;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --cheap: #2a78d6;   /* categorical slot 1 */
  --peak: #eb6834;    /* categorical slot 2 */
  --other: #898781;   /* de-emphasis, 3.5:1 on surface */
  --good: #006300;
  --bad: #b02a2a;
  --accent: #2a78d6;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #a3a29b;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --cheap: #3987e5;
    --peak: #d95926;
    --other: #6b6a65;
    --good: #0ca30c;
    --bad: #e66767;
    --accent: #3987e5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d; --surface: #1a1a19; --ink: #f0efec; --ink-2: #c3c2b7; --muted: #a3a29b; --grid: #2c2c2a;
  --axis: #383835; --border: rgba(255, 255, 255, 0.10); --cheap: #3987e5; --peak: #d95926; --other: #6b6a65;
  --good: #0ca30c; --bad: #e66767; --accent: #3987e5;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--page); color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 6px 10px; z-index: 10; }
main, .top, .foot { max-width: 920px; margin: 0 auto; padding: 0 16px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 14px; padding-bottom: 6px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; font-size: 15px; }
.brand svg path { fill: none; stroke-width: 3; stroke-linecap: round; }
.brand .tide1 { stroke: var(--cheap); } .brand .tide2 { stroke: var(--ink-2); }
.top nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 15px; }
.top nav a { color: var(--ink-2); text-decoration: none; }
.top nav a:hover { color: var(--ink); text-decoration: underline; }
.crumbs { font-size: 14px; color: var(--muted); margin-top: 12px; }
.crumbs a { color: var(--muted); }
.hero { padding: 18px 0 6px; }
.hero h1 { font-size: clamp(26px, 6vw, 40px); line-height: 1.15; margin: 4px 0 10px; letter-spacing: -0.01em; }
.eyebrow { margin: 0; color: var(--ink-2); font-weight: 600; font-size: 14px; text-transform: uppercase; letter-spacing: .06em; }
.lead { font-size: 18px; color: var(--ink-2); margin: 0 0 8px; max-width: 70ch; }
.nowrap { white-space: nowrap; }
h2 { font-size: 20px; margin: 28px 0 10px; }

.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 16px 0; }
.tile { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px 12px 22px; }
.tile .lbl { margin: 0; color: var(--ink-2); font-size: 14px; }
.tile .val { margin: 2px 0; font-size: 30px; font-weight: 700; }
.tile .sub { margin: 0; color: var(--ink-2); font-size: 14px; font-variant-numeric: tabular-nums; }
.tile .sw { position: absolute; left: 10px; top: 14px; bottom: 14px; width: 5px; border-radius: 3px; }
.delta .arrow { font-size: 11px; }
.delta.up .arrow { color: var(--bad); } .delta.down .arrow { color: var(--good); }
@media (max-width: 640px) { .tiles { grid-template-columns: 1fr; } }

.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 6px; }
.sw-cheap { background: var(--cheap); } .sw-peak { background: var(--peak); } .sw-other { background: var(--other); }

.chartfig { margin: 8px 0 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 12px 10px; }
.chartfig figcaption { font-size: 14px; color: var(--ink-2); margin: 0 4px 6px; }
.chartwrap { position: relative; }
.pricechart { width: 100%; height: auto; display: block; touch-action: pan-y; }
.pricechart:focus { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 6px; }
.pricechart .grid { stroke: var(--grid); stroke-width: 1; }
.pricechart .axis { stroke: var(--axis); stroke-width: 1.5; }
.pricechart .tick { fill: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.pricechart .b-cheap { fill: var(--cheap); } .pricechart .b-peak { fill: var(--peak); } .pricechart .b-other { fill: var(--other); }
.pricechart .bar.hover { opacity: .7; }
@media (max-width: 640px) { .pricechart .tick { font-size: 30px; } }
.pricechart .cursor { stroke: var(--ink-2); stroke-width: 1; }
.tip { position: absolute; pointer-events: none; background: var(--surface); color: var(--ink); border: 1px solid var(--border);
  border-radius: 10px; padding: 6px 10px; font-size: 13px; box-shadow: 0 6px 18px rgba(0,0,0,.15); white-space: nowrap; transform: translate(-50%, -110%); }
.tip strong { font-size: 15px; display: block; }
.tip .k { display: inline-block; width: 12px; height: 2px; vertical-align: middle; margin-right: 6px; background: var(--ink-2); }
.legend { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 18px; padding: 0; margin: 10px 4px 2px; font-size: 14px; color: var(--ink-2); }

.note { background: var(--surface); border-left: 4px solid var(--peak); padding: 10px 12px; border-radius: 8px; }
.windows ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.windows li { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 8px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px 12px; font-variant-numeric: tabular-nums; }
@media (max-width: 520px) { .windows li { grid-template-columns: 1fr; } }
.muted { color: var(--muted); font-size: 14px; }
.assume { color: var(--muted); font-size: 13px; margin-top: 14px; }

.suppliers { margin-top: 22px; }
.scroll { overflow-x: auto; }
.suppliers td, .suppliers th { white-space: nowrap; }

details.table { margin-top: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; }
details.table summary { cursor: pointer; font-weight: 600; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; font-variant-numeric: tabular-nums; font-size: 14px; }
caption { text-align: left; color: var(--muted); font-size: 13px; padding-bottom: 6px; }
th, td { text-align: left; padding: 4px 6px; border-bottom: 1px solid var(--grid); }
tr.hour th, tr.hour td { font-weight: 600; }
tr.q td { color: var(--ink-2); padding-left: 18px; }
tr.is-cheap th { box-shadow: inset 4px 0 var(--cheap); } tr.is-peak th { box-shadow: inset 4px 0 var(--peak); }

.video video { width: min(360px, 100%); height: auto; border-radius: var(--radius); background: #000; }
.more { margin: 20px 0; display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.btn { background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 999px; text-decoration: none; font-weight: 600; }
.pager { display: flex; justify-content: space-between; margin: 24px 0; }

.days { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.days a { display: grid; grid-template-columns: 1.2fr 1fr 1.6fr; align-items: center; gap: 10px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px 12px; color: var(--ink); text-decoration: none; }
.days a:hover { border-color: var(--accent); }
.days .c { color: var(--ink-2); font-size: 14px; font-variant-numeric: tabular-nums; }
.mini { width: 100%; max-width: 160px; height: 28px; } .mini rect { fill: var(--other); }
@media (max-width: 560px) { .days a { grid-template-columns: 1fr; } }
.cards { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
.cards a { display: block; height: 100%; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; color: var(--ink); text-decoration: none; }
.cards span { display: block; color: var(--ink-2); font-size: 14px; margin-top: 4px; }

.partners { margin: 26px 0; background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius); padding: 12px 14px; }
.partners ul { padding-left: 18px; } .partners li span { display: block; color: var(--ink-2); font-size: 14px; }
.adlabel { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 6px; }

.prose { max-width: 70ch; } .prose h1 { font-size: clamp(26px, 5vw, 36px); line-height: 1.2; }
.prose li { margin: 4px 0; }
.planner { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 14px 0; }
.planner label { display: grid; gap: 4px; font-size: 14px; color: var(--ink-2); }
.planner input, .planner select { font: inherit; padding: 9px 10px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--ink); }
@media (max-width: 560px) { .planner { grid-template-columns: 1fr; } }
.planner-out .res { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px; }
.planner-out .res strong { font-size: 20px; }
.foot { color: var(--muted); font-size: 13px; margin-top: 40px; padding-bottom: 30px; border-top: 1px solid var(--grid); padding-top: 14px; }
.foot a { color: var(--ink-2); }