/* Hallmark · macrostructure: Workbench · tone: utilitarian · anchor hue: amber
 * genre: modern-minimal · theme: Midnight · nav: N1a · footer: Ft2 · enrichment: none
 * density: tool, not landing
 */

*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.45;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  overflow-wrap: anywhere;
  min-width: 0;
  margin: 0 0 0.35rem;
}
h1 { font-size: 1.35rem; }
h2 { font-size: 0.95rem; }

a { color: inherit; }
a:hover { color: var(--color-accent); }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }

.skip {
  position: absolute; left: 0.75rem; top: -4rem;
  z-index: var(--z-modal);
  background: var(--color-paper-3);
  padding: 0.25rem 0.5rem;
}
.skip:focus { top: 0.5rem; }

.nav {
  position: sticky; top: 0; z-index: var(--z-sticky);
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-rule);
}
.nav__inner {
  display: flex; align-items: center; gap: 1rem;
  max-width: 72rem; margin: 0 auto;
  padding: 0.45rem var(--page-gutter);
  min-height: 2.5rem;
}
.nav__brand { font-weight: 600; text-decoration: none; letter-spacing: -0.04em; }
.nav__links {
  display: flex; gap: 0.85rem; list-style: none;
  margin: 0; padding: 0; overflow-x: auto;
}
.nav__links a {
  text-decoration: none; font-size: 0.8rem;
  color: var(--color-muted); white-space: nowrap;
}
.nav__links a[aria-current="true"] { color: var(--color-ink); }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0.75rem var(--page-gutter) 2rem; }

.block { margin: 0 0 1.1rem; padding: 0; max-width: none; }
.block__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem 1rem; margin-bottom: 0.5rem; }
.lede, .compact { margin: 0 0 0.5rem; color: var(--color-ink-2); font-size: 0.88rem; }
.note, .muted { margin: 0.35rem 0 0; font-size: 0.78rem; color: var(--color-muted); }
.err { color: var(--color-danger); }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 1rem 1.5rem;
  margin-bottom: 1.1rem;
}

.chips { display: flex; flex-wrap: wrap; gap: 0.3rem; margin: 0.4rem 0; }
.chip {
  appearance: none; border: 1px solid var(--color-rule-2);
  background: var(--color-paper-2); color: var(--color-ink);
  font: inherit; font-size: 0.75rem;
  padding: 0.15rem 0.5rem; border-radius: 999px; cursor: pointer;
}
.chip[aria-pressed="true"] {
  background: var(--color-accent); color: var(--color-accent-ink); border-color: var(--color-accent);
}

.controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.6rem;
  margin-bottom: 0.65rem;
}
.controls label {
  display: grid; gap: 0.15rem;
  font-size: 0.75rem; color: var(--color-muted);
}
.controls select, .controls input[type="range"] {
  width: 100%; font: inherit; color: var(--color-ink);
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: 2px; padding: 0.3rem 0.4rem;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin: 0.4rem 0;
}
.tile { background: var(--color-paper-2); padding: 0.5rem 0.65rem; border-radius: 4px; }
.tile .l { font-size: 0.68rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.tile .v { font-family: var(--font-outlier); font-size: 1.25rem; font-variant-numeric: tabular-nums; }
.tile .r { font-size: 0.72rem; color: var(--color-muted); }

.eq { font-size: 0.8rem; color: var(--color-muted); margin: 0.35rem 0; }

.bars { display: grid; gap: 0.35rem; margin-top: 0.4rem; }
.bar {
  display: grid; grid-template-columns: 6.2rem 1fr auto;
  gap: 0.45rem; align-items: center; font-size: 0.78rem;
}
.bar__track { height: 8px; background: var(--color-paper-3); border-radius: 999px; overflow: hidden; }
.bar__fill { height: 100%; background: var(--color-seq450); }
.bar__fill.is-diesel {
  background: repeating-linear-gradient(
    -45deg,
    var(--color-hatch), var(--color-hatch) 3px,
    color-mix(in oklch, var(--color-hatch) 45%, var(--color-paper-3)) 3px,
    color-mix(in oklch, var(--color-hatch) 45%, var(--color-paper-3)) 6px
  );
}

.inline-stat {
  font-family: var(--font-outlier);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-accent);
}
.hero__unit { font-size: 0.7em; color: var(--color-muted); }

.btn {
  appearance: none; border: 0;
  background: var(--color-accent); color: var(--color-accent-ink);
  font: inherit; font-size: 0.8rem; font-weight: 500;
  padding: 0.3rem 0.7rem; border-radius: 999px; cursor: pointer;
}
.btn[data-state="success"] { background: var(--color-seq250); color: var(--color-ink); }

.chartwrap { margin: 0.25rem 0; }
.chartwrap svg { display: block; max-height: 11rem; }

.savings { display: grid; gap: 0; margin-top: 0.4rem; }
.save {
  display: flex; justify-content: space-between; gap: 0.75rem;
  padding: 0.3rem 0; border-bottom: 1px solid var(--color-rule);
  font-size: 0.82rem;
}
.save__label, .save__delta { margin: 0; }
.save__tag { margin-left: 0.4rem; font-size: 0.7rem; color: var(--color-muted); font-family: var(--font-outlier); }
.save__delta { font-family: var(--font-outlier); }

.anchor-list { padding-left: 1.1rem; margin: 0.4rem 0; }
.anchor-list li { margin-bottom: 0.3rem; font-size: 0.82rem; }

.compare, .docs { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.compare th, .compare td, .docs th, .docs td {
  text-align: left; padding: 0.28rem 0.6rem 0.28rem 0;
  border-bottom: 1px solid var(--color-rule); vertical-align: top;
}

.install pre {
  background: var(--color-paper-2);
  padding: 0.65rem 0.75rem; overflow-x: auto;
  border-radius: 4px; font-family: var(--font-outlier); font-size: 0.75rem;
  margin: 0.4rem 0;
}

.foot {
  max-width: 72rem; margin: 0 auto;
  padding: 0.75rem var(--page-gutter) 1.25rem;
  border-top: 1px solid var(--color-rule);
  display: flex; flex-wrap: wrap; gap: 0.35rem 0.9rem;
  font-size: 0.75rem; color: var(--color-muted);
}
.foot a { color: var(--color-ink-2); text-decoration: none; }

.tooltip {
  position: fixed; display: none; z-index: var(--z-tooltip);
  background: var(--color-paper-3); color: var(--color-ink);
  padding: 0.25rem 0.45rem; border-radius: 2px;
  font-size: 0.72rem; pointer-events: none; max-width: 16rem;
}

@media (max-width: 768px) {
  .split, .tiles, .controls { grid-template-columns: minmax(0, 1fr); }
  .bar { grid-template-columns: 1fr; }
  .nav__links { display: none; }
}