@font-face {
  font-family: "Doorstep Display";
  src: url("/doorstep/fonts/Bricolage.413e7357809d.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Doorstep Serif";
  src: url("/doorstep/fonts/Newsreader.8a08d13f8a6c.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Doorstep Mono";
  src: url("/doorstep/fonts/PlexMono.a9b4c49bb299.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}

:root {
  --asphalt: #1a2220;
  --paper: #e4d9c4;
  --brass: #b08a3e;
  --ink: #141613;
  --bill: #8a2c1c;
  --silt: #5c6848;
  --carbon: #3a5363;
  --mortar: #8e7a66;
  --pencil: #746f66;
  --safe: env(safe-area-inset-bottom);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--asphalt);
  color: var(--paper);
  font-family: "Doorstep Serif", Georgia, serif;
  line-height: 1.55;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  background: var(--paper);
  color: var(--ink);
  padding: 0.5rem;
  z-index: 20;
}

.mast, main, footer {
  width: min(44rem, calc(100% - 2rem));
  margin-inline: auto;
}
.mast {
  display: flex;
  justify-content: space-between;
  padding: 1rem 0 0;
  font-family: "Doorstep Mono", ui-monospace, monospace;
  font-size: 0.8rem;
}
.mast a, footer a, .text-link { color: var(--brass); }
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
}

.kicker {
  font-family: "Doorstep Mono", ui-monospace, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--brass);
}

h1 {
  font-family: "Doorstep Display", "Arial Narrow", sans-serif;
  font-size: clamp(2.2rem, 8vw, 3.6rem);
  line-height: 1.05;
  font-weight: 700;
  margin: 0.2rem 0 0.8rem;
  max-width: 16ch;
}

.standfirst { font-size: 1.15rem; max-width: 42rem; }

#flap-form label {
  display: block;
  font-family: "Doorstep Mono", ui-monospace, monospace;
  font-size: 0.8rem;
  margin-bottom: 0.4rem;
}

.flap {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}
.flap input {
  flex: 1;
  min-width: 0;
  background: #0f1413;
  color: var(--paper);
  border: 2px solid var(--brass);
  font-family: "Doorstep Mono", ui-monospace, monospace;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.85rem 0.9rem;
  padding-bottom: calc(0.85rem + var(--safe));
}
.flap button, #worked-example, #clear-step, #copy-takeaway, dialog button {
  background: var(--brass);
  color: var(--ink);
  border: 0;
  font-family: "Doorstep Display", sans-serif;
  font-size: 1rem;
  padding: 0.85rem 1.1rem;
  min-height: 44px;
  cursor: pointer;
}

.flap__help, .privacy, .coverage, .example { color: var(--pencil); font-size: 0.95rem; }

.kerb {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem 1rem;
  margin: 1.5rem 0;
}
.kerb strong {
  display: block;
  font-family: "Doorstep Mono", ui-monospace, monospace;
  font-size: 1.2rem;
  color: var(--paper);
  white-space: nowrap;
}
.kerb span { color: var(--pencil); font-size: 0.85rem; }

.core-wrap { margin: 1.5rem 0; }
#core {
  width: 100%;
  height: auto;
  background: #121816;
  border: 1px solid #2a332f;
}
.stratum__band { fill: #1c2623; stroke: #2f3b36; }
.stratum.is-filled .stratum__band { fill: #24302c; }
.stratum[data-shelf="energy"] .stratum__band { stroke: var(--brass); }
.stratum[data-shelf="lsoa"] .stratum__band { stroke: var(--silt); }
.stratum[data-shelf="lad"] .stratum__band { stroke: var(--mortar); }
.stratum[data-shelf="icb"] .stratum__band { stroke: var(--carbon); }
.stratum[data-shelf="pcon"] .stratum__band { stroke: var(--bill); }
.stratum text { fill: var(--paper); font-family: "Doorstep Mono", ui-monospace, monospace; }
.stratum__mark { fill: var(--brass); font-size: 11px; }
.stratum__title { font-size: 12px; }
.stratum__empty { font-size: 11px; fill: var(--pencil); }
.stratum__value { font-size: 16px; }
.stratum { cursor: pointer; }

#riser {
  font-size: 1.05rem;
  margin-top: 0.8rem;
}

.slip, .ask, .takeaway, #method, #checkers, #sources {
  background: var(--paper);
  color: var(--ink);
  padding: 1.2rem 1.1rem;
  margin: 1.2rem 0;
}
.slip h2, .ask h2, .takeaway h2, #method h2, #checkers h2, #sources h2 {
  font-family: "Doorstep Display", sans-serif;
  margin-top: 0;
}
.slip a, .ask a, #sources a, .checker-list a { color: var(--bill); }

.checker-list { list-style: none; padding: 0; }
.checker-list li { margin: 0.7rem 0; }
.checker-list span { display: block; color: var(--pencil); font-size: 0.9rem; }

.source-grid { display: grid; gap: 1rem; }
.source-card__org {
  font-family: "Doorstep Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
}

footer {
  padding: 2rem 0 calc(2rem + var(--safe));
  color: var(--pencil);
  font-size: 0.9rem;
}

dialog {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  width: min(32rem, 92vw);
  padding: 1.2rem;
}
dialog::backdrop { background: rgb(10 12 11 / 0.7); }

@media (max-width: 640px) {
  .kerb { grid-template-columns: 1fr; }
  .flap { flex-direction: column; }
  h1 { font-size: 2.1rem; }
}

@media (min-width: 768px) {
  .source-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}