/* ==========================================================================
   Arch Enclosures
   Light ground, because the company's logo is a grey gradient arch on white and
   it has to sit on the page as supplied. Dark is kept for the photographic
   sections and one specification band, where it does the most work.
   ========================================================================== */

:root {
  /* colour */
  --paper:    #FFFFFF;
  --frost:    #EFF2F1;
  --frost-2:  #E4E9E8;
  --ink:      #101E25;
  --ink-soft: #44575E;
  --alu:      #7C8F96;
  --rule:     rgba(16,30,37,.14);
  --slate:    #15303A;
  --sun:      #F09101;   /* brand amber: fills and rules only */
  --sun-txt:  #A15D00;   /* amber dark enough to read as text on light */

  /* type */
  --sans: 'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --serif:'Newsreader', Georgia, 'Times New Roman', serif;

  --fs-display: clamp(2.75rem, 5.1vw, 5.4rem);
  --fs-h2:      clamp(2rem, 4.2vw, 3.9rem);
  --fs-h3:      clamp(1.15rem, 1.55vw, 1.5rem);
  --fs-lead:    clamp(1.075rem, 1.28vw, 1.4rem);
  --fs-body:    clamp(1rem, 1.02vw, 1.1rem);

  /* space */
  --pad-x:  clamp(1.25rem, 4vw, 4rem);
  --pad-y:  clamp(4.5rem, 8.5vw, 9rem);
  --maxw:   1520px;
  --bay:    clamp(64px, 7.2vw, 116px);

  --arch:   50% 50% 3px 3px / 33% 33% 3px 3px;
  --ease:   cubic-bezier(.22,.61,.36,1);
}

/* --------------------------------------------------------------- reset -- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--serif);
  font-size: var(--fs-body);
  line-height: 1.62;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  /* clip rather than hidden: hidden turns body into a scroll container and
     kills position:sticky on the seasons stage. */
  overflow-x: clip;
}
img, video, svg { display: block; max-width: 100%; }
img { height: auto; }
/* <picture> otherwise sits between the frame and the image as an inline box
   with no height, so object-fit had nothing to fill. */
picture { display: contents; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

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

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 200;
  background: var(--sun); color: #21160A; padding: .7rem 1.1rem;
  font-family: var(--sans); font-weight: 600; font-size: .9rem;
  text-decoration: none; transition: top .2s;
}
.skip:focus { top: 1rem; }

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

/* ---------------------------------------------------------- typography -- */
.h2, .hero__h1, .seasons__h, .range__h, .step__h, .save h3, .site-foot__h {
  font-family: var(--sans);
  font-weight: 600;
  font-variation-settings: 'wdth' 112;
  letter-spacing: -0.022em;
  text-wrap: balance;
}

.hero__h1 {
  font-size: var(--fs-display);
  font-weight: 700;
  font-variation-settings: 'wdth' 116;
  line-height: .9;
  letter-spacing: -0.038em;
}

.h2 { font-size: var(--fs-h2); line-height: 1.0; }
.h2--light { color: var(--paper); }

.lead {
  font-size: var(--fs-lead);
  line-height: 1.55;
  color: var(--ink-soft);
}
.lead--light { color: rgba(255,255,255,.84); }

/* Small capitalised labels: one or two words only, never a sentence. */
.label, .month, .fig dt, .field label, .site-foot__h, .phone__label, .enquiry__tel span {
  font-family: var(--sans);
  font-weight: 600;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .13em;
  line-height: 1.4;
}

/* Quiet asides set in the body face, at reading size, sentence case. */
.aside {
  font-family: var(--serif);
  font-size: .95rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* -------------------------------------------------------------- buttons -- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .6em;
  font-family: var(--sans);
  font-weight: 600;
  font-variation-settings: 'wdth' 100;
  font-size: .95rem;
  letter-spacing: .01em;
  padding: 1.05em 1.9em;
  border: 1px solid transparent;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .25s var(--ease), color .25s var(--ease),
              border-color .25s var(--ease), transform .25s var(--ease);
}
.btn--sun { background: var(--sun); color: #21160A; }
.btn--sun:hover { background: #ffa720; transform: translateY(-2px); }
.btn--line {
  background: transparent; color: var(--ink);
  border-color: rgba(16,30,37,.24);
}
.btn--line:hover { border-color: var(--sun); color: var(--sun-txt); }
.btn--sm { padding: .8em 1.3em; font-size: .85rem; }
.btn--block { width: 100%; }

.link-arrow {
  display: inline-flex; align-items: center; gap: .6em;
  font-family: var(--sans); font-weight: 600; font-size: .95rem;
  text-decoration: none;
  padding-bottom: .25em;
  border-bottom: 1px solid var(--sun);
  transition: gap .25s var(--ease), color .25s var(--ease);
}
.link-arrow::after { content: '→'; color: var(--sun-txt); }
.link-arrow:hover { gap: 1.1em; color: var(--sun-txt); }
.link-arrow--light { color: var(--paper); }
.link-arrow--light::after { color: var(--sun); }
.link-arrow--light:hover { color: var(--sun); }

/* --------------------------------------------------------------- header -- */
.site-head {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  padding-block: clamp(.85rem, 1.5vw, 1.35rem);
  color: var(--ink);
  transition: background-color .35s var(--ease), padding .35s var(--ease),
              box-shadow .35s var(--ease);
}
.site-head.is-stuck {
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  padding-block: .5rem;
  box-shadow: 0 1px 0 var(--rule);
}
.site-head__in {
  width: 100%; max-width: var(--maxw); margin-inline: auto;
  padding-inline: var(--pad-x);
  display: flex; align-items: center; gap: clamp(1rem, 3vw, 3rem);
}

.brand { display: block; flex: 0 0 auto; }
.brand img { width: clamp(124px, 11vw, 152px); height: auto; }
.brand--foot img { width: 190px; }

.nav { margin-left: auto; }
.nav__list { display: flex; gap: clamp(1rem, 1.9vw, 2.1rem); list-style: none; padding: 0; }
.nav__list a {
  font-family: var(--sans); font-weight: 500; font-size: .92rem;
  white-space: nowrap;
  text-decoration: none; color: var(--ink);
  padding-block: .4em;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.nav__list a:hover { color: var(--sun-txt); border-color: var(--sun); }

.head-cta { display: flex; align-items: center; gap: 1rem; flex: 0 0 auto; }
.phone { display: flex; flex-direction: column; text-decoration: none; line-height: 1.15; }
.phone__label { color: var(--alu); font-size: .6rem; }
.phone__num {
  font-family: var(--sans); font-weight: 700; font-size: 1.05rem;
  color: var(--ink);
}
.phone:hover .phone__num { color: var(--sun-txt); }

.burger {
  display: none; width: 44px; height: 44px; padding: 0;
  background: none; border: 1px solid rgba(16,30,37,.24); border-radius: 2px;
  cursor: pointer;
}
.burger__bars, .burger__bars::before, .burger__bars::after {
  display: block; width: 18px; height: 1.5px; background: var(--ink);
  margin-inline: auto; transition: transform .3s var(--ease), opacity .2s;
}
.burger__bars { position: relative; }
.burger__bars::before, .burger__bars::after { content: ''; position: absolute; left: 0; }
.burger__bars::before { top: -6px; }
.burger__bars::after  { top: 6px; }
.burger[aria-expanded="true"] .burger__bars { background: transparent; }
.burger[aria-expanded="true"] .burger__bars::before { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] .burger__bars::after  { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav {
  position: fixed; inset: 0; z-index: 99;
  background: var(--paper);
  padding: 7rem var(--pad-x) 2.5rem;
  display: flex; flex-direction: column; justify-content: space-between;
  overflow-y: auto;
}
.mobile-nav__list { list-style: none; padding: 0; }
.mobile-nav__list a {
  display: block;
  font-family: var(--sans); font-weight: 600;
  font-variation-settings: 'wdth' 112;
  font-size: clamp(1.7rem, 8vw, 2.6rem);
  line-height: 1.2;
  color: var(--ink); text-decoration: none;
  padding-block: .45em;
  border-bottom: 1px solid var(--rule);
}
.mobile-nav__foot { display: grid; gap: 1rem; padding-top: 2rem; }
.mobile-nav__tel {
  font-family: var(--sans); font-weight: 700; font-size: 1.25rem;
  color: var(--sun-txt); text-align: center; text-decoration: none;
}

/* ----------------------------------------------------------------- hero -- */
.hero {
  position: relative;
  background: var(--paper);
  padding-top: clamp(7rem, 12vw, 10.5rem);
  padding-bottom: clamp(3.5rem, 6vw, 6rem);
  overflow: hidden;
}
.hero__ribs {
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(90deg,
    rgba(16,30,37,.07) 0 1px, transparent 1px var(--bay));
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 22%, #000 68%, transparent);
          mask-image: linear-gradient(to bottom, transparent, #000 22%, #000 68%, transparent);
  pointer-events: none;
}
.hero__in {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: center;
}
.hero__lead {
  margin-top: clamp(1.5rem, 2.4vw, 2.4rem);
  font-size: var(--fs-lead);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 54ch;
}
.hero__actions {
  display: flex; flex-wrap: wrap; gap: .85rem;
  margin-top: clamp(1.8rem, 2.8vw, 2.6rem);
}
.hero__note {
  margin-top: clamp(1.8rem, 3vw, 2.8rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: .92rem;
  color: var(--ink-soft);
}

.arch-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--arch);
  background: var(--frost);
}
.arch-frame::after {
  content: ''; position: absolute; inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(16,30,37,.15);
  pointer-events: none;
}
.arch-frame__media, .arch-frame img { width: 100%; height: 100%; object-fit: cover; }

.hero__arch { margin: 0; }
.hero__arch .arch-frame {
  aspect-ratio: 4 / 5;
  max-height: 78vh;
  margin-inline: auto;
}
.hero__cap {
  margin-top: 1.1rem;
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--alu);
}

/* ---------------------------------------------------- the seasons scene -- */
/* Base: three full-height panels that simply scroll past, which is what you
   get with no JS. is-pinned turns the stage into one sticky frame and the
   panels cross-dissolve inside it under scroll. */
.seasons { position: relative; background: var(--ink); }
.seasons__panel {
  position: relative;
  height: 100vh; height: 100svh;
  overflow: hidden;
  display: flex; align-items: flex-end;
  padding-bottom: clamp(3rem, 8vh, 7rem);
}

.seasons.is-pinned { height: 300vh; }
.seasons.is-pinned .seasons__stage {
  position: sticky; top: 0;
  height: 100vh; height: 100svh;
  overflow: hidden;
}
.seasons.is-pinned .seasons__panel { position: absolute; inset: 0; height: 100%; }

.seasons__media {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
  z-index: 0;
}
.seasons__scrim {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(to top, rgba(6,14,18,.88) 0%, rgba(6,14,18,.42) 42%, rgba(6,14,18,0) 74%),
    linear-gradient(to right, rgba(6,14,18,.5) 0%, rgba(6,14,18,0) 62%);
}
.seasons__copy { position: relative; z-index: 2; color: var(--paper); }
.month { color: var(--sun); margin-bottom: 1.1rem; }
.month::before {
  content: ''; display: inline-block; vertical-align: middle;
  width: 2.4rem; height: 1px; background: var(--sun);
  margin-right: .9rem;
}
.seasons__h {
  font-size: clamp(2rem, 5.2vw, 4.6rem);
  line-height: .98;
  max-width: 22ch;
}
.seasons__p {
  margin-top: clamp(1rem, 1.8vw, 1.6rem);
  font-size: var(--fs-lead);
  color: rgba(255,255,255,.8);
  max-width: 52ch;
}

/* --------------------------------------------------------------- ranges -- */
.section { padding-block: var(--pad-y); }
.ranges { background: var(--frost); }

.section__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: end;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}
.section__intro { font-size: var(--fs-lead); line-height: 1.55; color: var(--ink-soft); }

.ranges__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 4vw, 4.5rem);
}
.range__fig {
  border-radius: var(--arch);
  overflow: hidden;
  aspect-ratio: 5 / 4;
  background: var(--frost-2);
  margin-bottom: clamp(1.4rem, 2.2vw, 2.2rem);
}
.range__fig img { width: 100%; height: 100%; object-fit: cover; }
.range__h { font-size: clamp(1.6rem, 2.4vw, 2.3rem); margin-bottom: .7rem; }
.range__p { max-width: 58ch; color: var(--ink-soft); }

.ticks { list-style: none; padding: 0; margin: 1.6rem 0 2rem; }
.ticks li {
  position: relative;
  padding-left: 2.1rem;
  padding-block: .5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: .95rem;
}
.ticks li:last-child { border-bottom: 1px solid var(--rule); }
.ticks li::before {
  content: ''; position: absolute; left: 0; top: 1.05em;
  width: 1.1rem; height: .55rem;
  border-radius: 1.1rem 1.1rem 0 0 / 1.1rem 1.1rem 0 0;
  border: 1.5px solid var(--sun);
  border-bottom: 0;
}

/* -------------------------------------------------------------- figures -- */
.figures {
  background: var(--slate);
  color: var(--paper);
  padding-block: clamp(3rem, 5vw, 4.5rem);
}
.figures__grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255,255,255,.14);
  border-block: 1px solid rgba(255,255,255,.14);
}
.fig {
  background: var(--slate);
  padding: clamp(1.2rem, 2vw, 1.9rem) clamp(.9rem, 1.4vw, 1.4rem);
}
.fig dt { color: #A9BAC0; margin-bottom: .8rem; }
.fig dd {
  font-family: var(--sans);
  font-weight: 700;
  font-variation-settings: 'wdth' 108;
  font-size: clamp(2rem, 3.1vw, 3rem);
  line-height: 1;
  letter-spacing: -.03em;
  margin: 0 0 .55rem;
}
.fig p { font-size: .88rem; line-height: 1.4; color: rgba(255,255,255,.66); }

/* -------------------------------------------------------- running costs -- */
.split { background: var(--paper); }
.split__in {
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: start;
}
.arch-frame--sm { aspect-ratio: 3 / 4; }
.split__copy .lead { margin-top: clamp(1.2rem, 2vw, 1.8rem); max-width: 62ch; }

.saves {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 2.6vw, 2.6rem);
  margin-top: clamp(2.2rem, 4vw, 3.4rem);
}
.save { padding-top: 1.1rem; border-top: 2px solid var(--sun); }
.save h3 { font-size: var(--fs-h3); margin-bottom: .5rem; }
.save p { color: var(--ink-soft); font-size: .98rem; }

/* ----------------------------------------------------------- commercial -- */
.commercial {
  position: relative;
  color: var(--paper);
  padding-block: clamp(6rem, 13vw, 12rem);
  overflow: hidden;
}
.commercial__bg { position: absolute; inset: 0; z-index: 0; }
.commercial__bg img { width: 100%; height: 100%; object-fit: cover; }
.commercial__bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(8,20,26,.94) 0%, rgba(8,20,26,.8) 42%, rgba(8,20,26,.25) 100%);
}
.commercial__in { position: relative; z-index: 1; }
.commercial .lead { margin-top: clamp(1.3rem, 2.2vw, 2rem); max-width: 68ch; }
.commercial .link-arrow { margin-top: clamp(1.8rem, 3vw, 2.6rem); }

/* -------------------------------------------------------------- process -- */
.process { background: var(--frost); }
.steps {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(1.5rem, 2.4vw, 2.6rem);
}
.step { border-top: 1px solid rgba(16,30,37,.22); padding-top: 1.2rem; }
.step__n {
  display: block;
  font-family: var(--sans); font-weight: 700; font-size: .8rem;
  letter-spacing: .1em;
  color: var(--sun-txt);
  margin-bottom: 1.4rem;
}
.step__h { font-size: var(--fs-h3); margin-bottom: .6rem; }
.step p { font-size: .96rem; color: var(--ink-soft); }

.details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 3vw, 3rem);
  margin-top: clamp(3rem, 5.5vw, 5.5rem);
}
.detail { margin: 0; }
.detail img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 3px; }
.detail figcaption {
  margin-top: 1rem;
  font-family: var(--serif);
  font-size: .95rem;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 46ch;
}

/* -------------------------------------------------------------- enquiry -- */
.enquiry { background: var(--paper); padding-block: var(--pad-y); position: relative; }
.enquiry::before {
  content: ''; position: absolute; inset: 0;
  background-image: repeating-linear-gradient(90deg,
    rgba(16,30,37,.045) 0 1px, transparent 1px var(--bay));
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 60%);
          mask-image: linear-gradient(to bottom, #000, transparent 60%);
  pointer-events: none;
}
.enquiry__in {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 5vw, 6rem);
  align-items: start;
}
.enquiry__copy .lead { margin-top: clamp(1.2rem, 2vw, 1.8rem); max-width: 52ch; }
.enquiry__tel {
  display: inline-flex; align-items: baseline; gap: .8rem;
  margin-top: clamp(2rem, 3.4vw, 3rem);
  text-decoration: none;
}
.enquiry__tel span { color: var(--alu); }
.enquiry__tel strong {
  font-family: var(--sans); font-weight: 700;
  font-variation-settings: 'wdth' 112;
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  letter-spacing: -.02em; color: var(--sun-txt);
}
.enquiry__small {
  margin-top: 1.6rem; padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  font-family: var(--serif);
  color: var(--ink-soft); font-size: .95rem; max-width: 46ch;
}

.form {
  background: var(--frost);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: clamp(1.5rem, 2.6vw, 2.4rem);
}
.form__row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.field { display: block; margin-bottom: 1rem; }
.field label { display: block; color: var(--ink-soft); margin-bottom: .5rem; }
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--paper);
  border: 1px solid rgba(16,30,37,.22);
  border-radius: 2px;
  padding: .85rem 1rem;
  font-family: var(--sans); font-size: 1rem;
  color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; }
.field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--alu) 50%),
                    linear-gradient(135deg, var(--alu) 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--sun); box-shadow: 0 0 0 3px rgba(240,145,1,.18); outline: none;
}
.field input::placeholder, .field textarea::placeholder { color: #93A3A9; }
.form .btn { margin-top: .6rem; }
.form__note {
  margin-top: 1.1rem;
  font-family: var(--serif);
  font-size: .92rem;
  color: var(--ink-soft);
}
.hp { position: absolute; left: -9999px; }

.form__msg {
  padding: 1rem 1.2rem; border-radius: 2px; margin-bottom: 1.5rem;
  font-family: var(--sans); font-size: .95rem;
}
.form__msg--ok  { background: rgba(240,145,1,.14); border: 1px solid var(--sun); color: #4A3000; }
.form__msg--bad { background: rgba(190,40,40,.08); border: 1px solid #C0504A; color: #7A211C; }

/* --------------------------------------------------------------- footer -- */
.site-foot {
  background: var(--frost-2);
  color: var(--ink-soft);
  padding-top: clamp(3.5rem, 6vw, 5.5rem);
  border-top: 1px solid var(--rule);
}
.site-foot__in {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: clamp(2.5rem, 5vw, 5rem);
  padding-bottom: clamp(3rem, 5vw, 4.5rem);
}
.brand--foot { margin-bottom: 1.4rem; }
.site-foot__line { max-width: 34ch; font-size: .98rem; }
.site-foot__tel {
  display: inline-block; margin-top: 1.2rem;
  font-family: var(--sans); font-weight: 700; font-size: 1.5rem;
  color: var(--ink); text-decoration: none;
}
.site-foot__tel:hover { color: var(--sun-txt); }
.site-foot__nav { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
.site-foot__h { color: var(--ink); margin-bottom: 1.1rem; }
.site-foot__nav ul { list-style: none; padding: 0; display: grid; gap: .55rem; }
.site-foot__nav a { font-family: var(--sans); font-size: .95rem; text-decoration: none; }
.site-foot__nav a:hover { color: var(--sun-txt); }
.site-foot__base {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  padding-block: 1.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--ink-soft);
}
.site-foot__base a { text-decoration: none; }
.site-foot__base a:hover { color: var(--sun-txt); }

/* ------------------------------------------------------------ responsive -- */
@media (max-width: 1180px) {
  .figures__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 1140px) {
  .nav { display: none; }
  .phone { display: none; }
  .burger { display: grid; place-items: center; }
  .head-cta { margin-left: auto; }

  .hero__in { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero__arch .arch-frame { aspect-ratio: 1 / 1; max-height: none; max-width: 560px; }

  /* Side-lit scrim only works while there is room to the right of the copy. */
  .commercial__bg::after {
    background: linear-gradient(to top, rgba(8,20,26,.93) 0%, rgba(8,20,26,.78) 58%, rgba(8,20,26,.38) 100%);
  }

  .section__head { grid-template-columns: 1fr; align-items: start; gap: 1.2rem; }
  .ranges__grid { grid-template-columns: 1fr; }
  .split__in { grid-template-columns: 1fr; }
  .arch-frame--sm { aspect-ratio: 5 / 4; max-width: 560px; }
  .enquiry__in { grid-template-columns: 1fr; }
  .site-foot__in { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .figures__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: 1fr; }
  .saves { grid-template-columns: 1fr; }
  .details { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; gap: 0; }
  .site-foot__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__actions .btn { flex: 1 1 100%; }
  .seasons__panel { padding-bottom: 3rem; }
}

@media (max-width: 420px) {
  .figures__grid { grid-template-columns: 1fr; }
  .site-foot__nav { grid-template-columns: 1fr; }
}

/* ----------------------------------------------------------- animation -- */
/* .js-anim is set inline in the head, before first paint, and taken back off
   again by main.js if GSAP never turns up. Only the load sequence hides
   anything; scroll reveals are handled entirely in JS. */
.js-anim .hero__h1,
.js-anim .hero__lead,
.js-anim .hero__actions,
.js-anim .hero__note,
.js-anim .hero__cap,
.js-anim .hero__arch { opacity: 0; }

.hero__h1 .line { display: block; overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .seasons__panel { position: relative; }
}

/* Homepage design on its own: the navigation scrolls to sections, so keep
   the fixed header clear of whatever an anchor lands on. */
main section[id] { scroll-margin-top: 96px; }