/* ==========================================================================
   CAR-TECH Mobilny Serwis Pojazdów
   Design tokens, layout system and components. Static site, no build step.

   Colour works in two layers. The palette below is fixed. On top of it sits a
   small set of role tokens (ink, accent, rule, panel) that every component
   reads. Any surface that turns dark reassigns those roles once, so components
   need no per surface override and cannot drift out of contrast.
   ========================================================================== */

:root {
  /* Surfaces */
  --color-asphalt: #1B1A1E;
  --color-asphalt-soft: #26242A;
  --color-concrete: #F3F1EA;
  --color-paper: #FFFFFF;

  /* Text */
  --color-graphite: #201F24;
  --color-steel: #6C6A70;
  --color-mist: #C9C6CE;

  /* Brand, taken from the logo */
  --color-maroon: #8A2332;
  --color-maroon-deep: #5C1721;
  --color-maroon-bright: #B4384B;

  /* Reserved for data and diagnostics, dark surfaces only */
  --color-amber: #DDA23F;

  --color-hairline: rgba(255, 255, 255, 0.12);
  --color-hairline-dark: rgba(32, 31, 36, 0.12);

  /* Roles on a light surface */
  --ink: var(--color-graphite);
  --ink-strong: var(--color-graphite);
  --ink-muted: var(--color-steel);
  --accent: var(--color-maroon);
  --accent-ink: var(--color-paper);
  --rule: var(--color-hairline-dark);
  --panel: var(--color-paper);
  --focus: var(--color-graphite);

  /* Type */
  --font-display: 'Archivo', 'Arial Narrow', system-ui, sans-serif;
  --font-body: 'Source Sans 3', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'Azeret Mono', ui-monospace, 'SFMono-Regular', 'Menlo', monospace;

  --step-1: 1.125rem;
  --step-2: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --step-3: clamp(1.5rem, 1.32rem + 0.9vw, 2rem);
  --step-4: clamp(1.85rem, 1.55rem + 1.5vw, 2.75rem);
  --step-5: clamp(2.25rem, 1.72rem + 2.6vw, 3.75rem);
  --step-6: clamp(2.6rem, 1.9rem + 3.4vw, 4.75rem);

  /* Space */
  --wrap: 78rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --band-y: clamp(3.75rem, 6.5vw, 6.5rem);
  --band-y-lg: clamp(5rem, 9vw, 9rem);

  --radius: 4px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 260ms;

  --z-sticky: 100;
  --z-drawer: 200;
  --z-skip: 300;

  /* Tread motif, cut from the tyre in the logo. */
  --tread: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 16'%3E%3Cg fill='%23000'%3E%3Cpath d='M3 1 L12 1 L9 7 L0 7 Z'/%3E%3Cpath d='M15 1 L24 1 L21 7 L12 7 Z'/%3E%3Cpath d='M0 9 L9 9 L12 15 L3 15 Z'/%3E%3Cpath d='M12 9 L21 9 L24 15 L15 15 Z'/%3E%3C/g%3E%3C/svg%3E");
}

/* Every dark surface, declared once. */
.masthead,
.crumbs,
.hero,
.plate,
.band--dark,
.who__panel--dark,
.callout,
.rail,
.shot,
.footer {
  background: var(--color-asphalt);
  color: var(--ink);
  --ink: var(--color-mist);
  --ink-strong: var(--color-paper);
  --ink-muted: var(--color-mist);
  --accent: var(--color-amber);
  --accent-ink: var(--color-asphalt);
  --rule: var(--color-hairline);
  --panel: var(--color-asphalt-soft);
  --focus: var(--color-amber);
}

/* The work order is a printed sheet, so it returns to light roles wherever it lands. */
.proto {
  --ink: var(--color-graphite);
  --ink-strong: var(--color-graphite);
  --ink-muted: var(--color-steel);
  --accent: var(--color-maroon);
  --accent-ink: var(--color-paper);
  --rule: var(--color-hairline-dark);
  --focus: var(--color-graphite);
}

/* =============================================================== reset == */

*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--color-concrete);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, iframe { display: block; max-width: 100%; }
iframe { border: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 78%;
  line-height: 1.04;
  letter-spacing: -0.015em;
  text-wrap: balance;
  color: var(--ink-strong);
}

h1 { font-size: var(--step-6); }
h2 { font-size: var(--step-5); }
h3 { font-size: var(--step-3); }
h4 { font-size: var(--step-2); line-height: 1.15; }

p { text-wrap: pretty; }

ul, ol { padding: 0; list-style: none; }

a { color: inherit; }

button, input, textarea, select { font: inherit; color: inherit; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--color-maroon); color: #fff; }

.skip {
  position: absolute;
  left: 0.5rem;
  top: -100%;
  z-index: var(--z-skip);
  padding: 0.75rem 1.25rem;
  background: var(--color-maroon);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-decoration: none;
}
.skip:focus { top: 0.5rem; }

/* ============================================================= helpers == */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.band { padding-block: var(--band-y); }
.band--tall { padding-block: var(--band-y-lg); }

.lede {
  font-size: var(--step-2);
  line-height: 1.5;
  max-width: 46ch;
  color: var(--ink);
}

.prose { max-width: 68ch; }
.prose p { color: var(--ink); }
.prose p + p { margin-top: 1.15em; }

/* Vertical rhythm utilities, for blocks that need space from what precedes them. */
.flow-sm { margin-top: 1rem; }
.flow-md { margin-top: 1.75rem; }
.flow-lg { margin-top: 2.5rem; }
.flow-xl { margin-top: 3.25rem; }
.stack-sm { margin-bottom: 1.25rem; }

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.link-plain {
  color: inherit;
  text-decoration-color: var(--accent);
  text-underline-offset: 0.25em;
  text-decoration-thickness: 1px;
}
.link-plain:hover { text-decoration-thickness: 2px; }

/* Tread motif, masked so it tiles instead of stretching.
   Three surfaces only: the section rail, the footer, and pending photo slots. */
.tread {
  height: 14px;
  background-color: var(--color-maroon);
  opacity: 0.5;
  -webkit-mask: var(--tread) repeat-x center / 30px 14px;
  mask: var(--tread) repeat-x center / 30px 14px;
}

/* ============================================================== button == */

.btn {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 0.35rem 0.6rem;
  padding: 0.85rem clamp(1rem, 4vw, 1.4rem);
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 82%;
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out),
    color var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}
.btn__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  text-transform: none;
  white-space: nowrap;
}
.btn--lg { padding: 1.05rem clamp(1.1rem, 5vw, 1.75rem); font-size: 1.1rem; }
.btn--lg .btn__num { font-size: 1rem; }

/* The call button holds one colour everywhere: it is the same action on every page. */
.btn--primary {
  background: var(--color-maroon);
  border-color: var(--color-maroon);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-maroon-bright);
  border-color: var(--color-maroon-bright);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}
.btn--ghost:hover {
  background: var(--accent);
  color: var(--accent-ink);
  transform: translateY(-2px);
}

/* ============================================================ masthead == */

.masthead {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  border-bottom: 1px solid var(--rule);
}
.masthead__inner {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  min-height: 76px;
  padding-block: 0.75rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  margin-right: auto;
}
.logo__mark { width: clamp(42px, 11vw, 54px); height: auto; flex: none; }
.logo__mark--footer { width: 74px; }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 76%;
  font-size: clamp(1.2rem, 4.5vw, 1.5rem);
  letter-spacing: 0.06em;
  color: var(--color-paper);
}
.logo__tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-top: 0.3rem;
  white-space: nowrap;
}
@media (max-width: 26rem) { .logo__tag { display: none; } }

.nav__list { display: flex; gap: clamp(0.75rem, 1.8vw, 1.75rem); }
.nav__link {
  display: block;
  padding: 0.4rem 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-stretch: 84%;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-mist);
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.nav__link:hover { color: var(--color-paper); border-bottom-color: var(--color-maroon-bright); }
.nav__link--current { color: var(--color-paper); border-bottom-color: var(--color-amber); }

.masthead__call { padding: 0.7rem 1.1rem; }

.burger {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.6rem 0.85rem;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--color-paper);
  font-family: var(--font-display);
  font-weight: 600;
  font-stretch: 84%;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}
.burger__bars { display: grid; gap: 4px; width: 20px; }
.burger__bars span { display: block; height: 2px; background: currentColor; }

.drawer {
  display: none;
  z-index: var(--z-drawer);
  padding: 0 var(--gutter) 1.5rem;
  border-top: 1px solid var(--rule);
}
.drawer[data-open] { display: block; }
.drawer__list { display: grid; }
.drawer__link {
  display: block;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-display);
  font-weight: 600;
  font-stretch: 84%;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-mist);
}
.drawer__link--current { color: var(--color-amber); }
.drawer__call { margin-top: 1.25rem; width: 100%; }

@media (max-width: 62rem) {
  .nav, .masthead__call { display: none; }
  .burger { display: inline-flex; }
}

/* ============================================================= crumbs == */

.crumbs { border-bottom: 1px solid var(--rule); }
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 0.7rem var(--gutter);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.crumbs__list li + li::before { content: '›'; margin-right: 0.7rem; opacity: 0.6; }
.crumbs__list a { text-decoration: none; }
.crumbs__list a:hover { color: var(--accent); }
.crumbs__list [aria-current] { color: var(--accent); }

/* =============================================================== hero == */

.hero { position: relative; overflow: hidden; }
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
  padding-block: clamp(2.75rem, 5vw, 4rem);
}
.hero__title {
  color: var(--color-paper);
  letter-spacing: -0.02em;
  max-width: 15ch;
}
.hero__sub {
  margin-top: 1.25rem;
  font-size: var(--step-2);
  line-height: 1.5;
  max-width: 44ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.75rem;
}
.hero__stamp {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  max-width: 100%;
  gap: 0.7rem;
  margin-bottom: 1.35rem;
  padding: 0.4rem 0.8rem 0.4rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-amber);
}
.hero__pip {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-amber);
  box-shadow: 0 0 0 4px rgba(221, 162, 63, 0.18);
}

@media (min-width: 60rem) {
  .hero__inner { grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr); }
}

/* Hairline data strip under the hero, set like an equipment nameplate. */
.plate { border-top: 1px solid var(--rule); }
.plate__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--rule);
  border-inline: 1px solid var(--rule);
}
.plate__item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.1rem clamp(1rem, 2vw, 1.6rem);
  background: var(--color-asphalt);
}
.plate__key {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.plate__val { font-size: 1rem; line-height: 1.35; color: var(--ink-strong); }
.plate__val a { text-decoration: none; }
.plate__val a:hover { text-decoration: underline; text-underline-offset: 0.25em; }
@media (min-width: 40rem) { .plate__list { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .plate__list { grid-template-columns: repeat(4, 1fr); } }

/* ========================================================== range map == */

.rmap { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
.rmap__svg { width: 100%; height: auto; overflow: visible; }

.rmap__zone { fill: none; stroke-width: 1.25; }
.rmap__zone--1 { stroke: var(--color-amber); opacity: 0.9; }
.rmap__zone--2 { stroke: var(--color-maroon-bright); opacity: 0.75; stroke-dasharray: 7 6; }
.rmap__zone--3 { stroke: var(--color-mist); opacity: 0.45; stroke-dasharray: 2 8; }

/* Rings sweeping out from the base. The static zones above stay drawn underneath,
   so the diagram is already complete before a single frame runs. */
.rmap__pulse {
  fill: none;
  stroke: var(--color-amber);
  stroke-width: 1.5;
  opacity: 0;
  animation: rmap-sweep 5.7s var(--ease-out) infinite;
  animation-delay: var(--delay);
}
@keyframes rmap-sweep {
  0%   { r: 18; opacity: 0; }
  8%   { opacity: 0.65; }
  70%  { opacity: 0.14; }
  100% { r: 336; opacity: 0; }
}

.rmap__places circle { fill: var(--color-mist); opacity: 0.75; }
.rmap__places text { font-family: var(--font-mono); font-size: 13px; fill: var(--color-mist); opacity: 0.85; }
.rmap__place--quiet circle { opacity: 0.35; }

/* Tick colour matches the ring it labels, so the legend reads without a key lookup. */
.rmap__tick circle { fill: var(--color-asphalt); stroke-width: 1.5; }
.rmap__tick text {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.rmap__tick--1 circle { stroke: var(--color-amber); }
.rmap__tick--1 text { fill: var(--color-amber); }
.rmap__tick--2 circle { stroke: var(--color-maroon-bright); }
.rmap__tick--2 text { fill: #D8697A; }
.rmap__tick--3 circle { stroke: var(--color-mist); }
.rmap__tick--3 text { fill: var(--color-mist); }

.rmap__origin circle { fill: none; stroke: var(--color-maroon-bright); stroke-width: 2; }
.rmap__origin-core { fill: var(--color-maroon-bright); stroke: none; }
.rmap__origin line { stroke: var(--color-maroon-bright); stroke-width: 1.5; }
.rmap__origin text {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  fill: var(--color-paper);
  text-anchor: middle;
}

.rmap__legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
}
.rmap__legend-item { display: flex; gap: 0.85rem; align-items: flex-start; }
.rmap__legend-key {
  flex: none;
  width: 26px;
  height: 0;
  margin-top: 0.75rem;
  border-top-width: 2px;
  border-top-style: solid;
}
.rmap__legend-key--1 { border-top-color: var(--color-amber); }
.rmap__legend-key--2 { border-top-color: var(--color-maroon-bright); border-top-style: dashed; }
.rmap__legend-key--3 { border-top-color: var(--color-mist); border-top-style: dotted; }
.rmap__legend-body { display: grid; gap: 0.15rem; }
.rmap__legend-body strong {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 82%;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-strong);
}
.rmap__legend-body span { font-size: 0.95rem; }

.rmap--full .rmap__svg { max-width: 54rem; margin-inline: auto; }
@media (min-width: 52rem) {
  .rmap--full .rmap__legend { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
}

/* Below tablet the diagram scales past label legibility, so the legend names the zones. */
@media (max-width: 46rem) {
  .rmap__places text,
  .rmap__tick text { display: none; }
  .rmap__origin text { font-size: 26px; }
}

/* =========================================================== protocol == */

.proto {
  position: relative;
  color: var(--ink);
  border: 1px solid var(--rule);
  border-bottom: 0;
  max-width: 44rem;
}
.proto__head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  align-items: baseline;
  padding: 1rem clamp(1.1rem, 3vw, 1.75rem);
  background: var(--color-paper);
  border-bottom: 2px solid var(--color-graphite);
}
.proto__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 78%;
  font-size: 1.4rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.proto__org {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
}
.proto__body { background: var(--color-paper); padding-inline: clamp(1.1rem, 3vw, 1.75rem); }
.proto__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.15rem 0.9rem;
  align-items: baseline;
  padding-block: 1.1rem;
  border-bottom: 1px dashed var(--rule);
}
.proto__step:last-child { border-bottom: 0; }
.proto__n {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--accent);
  padding-top: 0.1rem;
}
.proto__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 80%;
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.85rem);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.05;
}
.proto__desc {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--ink-muted);
}
.proto__foot {
  padding: 1.15rem clamp(1.1rem, 3vw, 1.75rem) 1.4rem;
  background: var(--color-paper);
  border-top: 1px solid var(--rule);
  font-size: 0.95rem;
  color: var(--ink-muted);
}
/* Torn lower edge of a printed work order. */
.proto__tear {
  height: 9px;
  background: var(--color-paper);
  -webkit-mask: radial-gradient(circle at 6px 9px, transparent 6px, #000 6.5px) 0 0 / 12px 9px repeat-x;
  mask: radial-gradient(circle at 6px 9px, transparent 6px, #000 6.5px) 0 0 / 12px 9px repeat-x;
}

/* ============================================================= picker == */

.picker { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.75rem; }
.picker__intro { display: grid; gap: 0.75rem; }
.picker__heading { font-size: var(--step-4); }
.picker__lead { max-width: 52ch; font-size: var(--step-1); color: var(--ink); }

.picker__tabs { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.picker__tab {
  padding: 0.65rem 1.05rem;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  font-stretch: 84%;
  font-size: 0.95rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
}
.picker__tab:hover { border-color: var(--accent); color: var(--accent); }
.picker__tab[aria-selected='true'] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.picker__panel[hidden] { display: none; }
.picker__panel {
  display: grid;
  gap: 1rem;
  justify-items: start;
  align-content: start;
  min-height: 15rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--panel);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--accent);
  animation: panel-in 320ms var(--ease-out) both;
}
@keyframes panel-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.picker__kind {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 78%;
  font-size: var(--step-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.05;
  color: var(--ink-strong);
}
.picker__text { max-width: 58ch; color: var(--ink); }

/* ====================================================== split sections == */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
@media (min-width: 58rem) {
  .split--lead { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); }
  .split--trail { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); }
}
.split__head { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1rem; align-content: start; }

/* ============================================================ audience == */

.who { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1px; background: var(--color-hairline-dark); }
@media (min-width: 54rem) { .who { grid-template-columns: repeat(2, 1fr); } }
.who__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  align-content: start;
  padding: clamp(1.75rem, 4vw, 3rem);
  background: var(--color-concrete);
}
/* Restated after the base rule so the light panel background does not win on source order. */
.who__panel--dark { background: var(--color-asphalt); }
.who__title { font-size: var(--step-3); }
.who__text { max-width: 46ch; color: var(--ink); }
.who__brands {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}

/* =========================================================== work list == */

.work {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--rule);
  border-block: 1px solid var(--rule);
}
@media (min-width: 44rem) { .work { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 70rem) { .work { grid-template-columns: repeat(3, 1fr); } }
.work__item {
  display: grid;
  gap: 0.55rem;
  align-content: start;
  padding: clamp(1.5rem, 3vw, 2rem);
  background: var(--color-concrete);
  transition: background-color var(--dur) var(--ease-out);
}
.work__item:hover { background: var(--color-paper); }
.work__name { font-size: var(--step-2); letter-spacing: 0.02em; }
.work__desc { font-size: 1rem; color: var(--ink-muted); max-width: 40ch; }

/* ============================================================== specs == */

.specs { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; border-top: 1px solid var(--rule); }
.specs__item {
  display: grid;
  gap: 0.3rem 2rem;
  padding-block: 1.35rem;
  border-bottom: 1px solid var(--rule);
}
@media (min-width: 50rem) {
  .specs__item { grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); align-items: baseline; }
}
.specs__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 80%;
  font-size: var(--step-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.1;
  color: var(--ink-strong);
}
.specs__desc { color: var(--ink-muted); font-size: 1.05rem; max-width: 56ch; }

/* ============================================================== scope == */

.scope { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.75rem; margin-top: 1.5rem; }
.scope__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: baseline;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--rule);
}
.scope__mark { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); }

/* =============================================================== shot == */

.shots { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1px; background: var(--color-hairline); }
@media (min-width: 46rem) { .shots { grid-template-columns: repeat(3, 1fr); } }
.shot { display: grid; border: 1px solid var(--rule); background: var(--color-asphalt-soft); }
.shot__art {
  aspect-ratio: 4 / 3;
  background-color: var(--color-mist);
  opacity: 0.1;
  -webkit-mask: var(--tread) repeat center / 44px 30px;
  mask: var(--tread) repeat center / 44px 30px;
}
.shot__cap {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 1rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--ink);
}
.shot__code { color: var(--accent); letter-spacing: 0.14em; text-transform: uppercase; }

/* ============================================================ callout == */

.callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  justify-items: start;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 3px solid var(--color-maroon-bright);
}
.callout__text { font-size: var(--step-2); line-height: 1.45; color: var(--ink-strong); max-width: 40ch; }
.callout__alt { font-family: var(--font-mono); font-size: 0.85rem; }

/* =========================================================== siblings == */

.siblings { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1rem; }
.siblings__head {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.siblings__list { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.siblings__link {
  display: inline-block;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 0.95rem;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}
.siblings__link:hover { border-color: var(--accent); color: var(--accent); }

/* =============================================================== rail == */

.rail__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-block: var(--band-y);
}
@media (min-width: 58rem) { .rail__inner { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); } }
.rail__title { font-size: var(--step-4); }
.rail__note { margin-block: 0.9rem 1.75rem; max-width: 38ch; }
.rail__data { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; border-top: 1px solid var(--rule); }
@media (min-width: 40rem) { .rail__data { grid-template-columns: repeat(2, 1fr); column-gap: 2.5rem; } }
.rail__row { padding-block: 1rem; border-bottom: 1px solid var(--rule); }
.rail__row--wide { grid-column: 1 / -1; }
.rail__row dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.rail__row dd { margin: 0; color: var(--ink-strong); line-height: 1.45; }

/* =============================================================== form == */

.form { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.25rem; max-width: 34rem; }
.field { display: grid; gap: 0.4rem; }
.field__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
}
.field__req { color: var(--color-maroon); }
.field__input {
  width: 100%;
  padding: 0.8rem 0.9rem;
  background: var(--color-paper);
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: border-color var(--dur) var(--ease-out);
}
.field__input::placeholder { color: var(--color-steel); }
.field__input:hover { border-color: var(--color-graphite); }
.field__input:focus { border-color: var(--color-maroon); }
textarea.field__input { min-height: 8rem; resize: vertical; }
.field__error {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-maroon-deep);
  min-height: 1.2em;
}
.field[data-invalid] .field__input { border-color: var(--color-maroon-deep); border-width: 2px; }

.form__status {
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--rule);
  background: var(--color-paper);
  font-size: 0.98rem;
}
.form__status[data-state='ok'] { border-color: var(--color-maroon); }
.form__status[data-state='err'] { border-color: var(--color-maroon-deep); background: #FBF0F1; }
.form__status:empty { display: none; }

.map-embed {
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--rule);
  background: var(--color-asphalt-soft);
}
@media (min-width: 58rem) { .map-embed { aspect-ratio: 1 / 1; } }

.aside { display: grid; grid-template-columns: minmax(0, 1fr); align-content: start; }
.aside__note {
  display: grid;
  gap: 0.9rem;
  justify-items: start;
  margin-top: 2.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule);
}
.aside__title { font-size: var(--step-2); }
.aside__text { font-size: 1.02rem; color: var(--ink-muted); max-width: 46ch; }

/* ============================================================= footer == */

.footer__tread {
  height: 16px;
  background-color: var(--color-maroon);
  opacity: 0.45;
  -webkit-mask: var(--tread) repeat-x center / 30px 16px;
  mask: var(--tread) repeat-x center / 30px 16px;
}
.footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
  padding-block: clamp(3rem, 6vw, 4.5rem) 2.5rem;
}
@media (min-width: 46rem) { .footer__inner { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 68rem) { .footer__inner { grid-template-columns: 1.5fr 1fr 1fr 1fr; } }
.footer__brand { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.1rem; justify-items: start; }
.footer__blurb { font-size: 0.98rem; max-width: 40ch; }
.footer__head {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.footer__list { display: grid; gap: 0.6rem; font-size: 0.98rem; }
.footer__list a { text-decoration: none; }
.footer__list a:hover { color: var(--ink-strong); text-decoration: underline; text-underline-offset: 0.25em; }
.footer__phone { font-family: var(--font-mono); font-size: 1.05rem; color: var(--ink-strong); }
.footer__base {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  justify-content: space-between;
  padding-block: 1.4rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

/* ====================================================== reduced motion == */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .rmap__pulse { display: none; }
  .btn:hover { transform: none; }
}