/* ==========================================================================
   site.css
   One stylesheet. Read top to bottom: tokens, base, layout, components.
   Naming: .block__element and .block--modifier. Keep it that way and
   selectors will never fight each other.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Colour. A regulated-industry palette: deep green ink on mineral paper,
     with a single ochre signal used only for active and marker states. */
  --ink:     #0D1A19;
  --petrol:  #12332E;
  --sage:    #56736A;
  --paper:   #EDEFEA;
  --card:    #F6F7F4;
  --mist:    #D6DCD4;
  --ochre:   #B8791C;

  /* Type */
  --display: "Archivo", system-ui, sans-serif;
  --body:    "Source Sans 3", system-ui, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  /* Spacing scale */
  --s1: 0.5rem;
  --s2: 1rem;
  --s3: 1.5rem;
  --s4: 2.5rem;
  --s5: 4rem;
  --s6: 6rem;

  --measure: 62ch;
  --radius: 2px;
}

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; }

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

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper);
  padding: var(--s2); z-index: 100;
}
.skip:focus { left: 0; }

.code { font-family: var(--mono); font-size: 0.9em; letter-spacing: -0.01em; }

/* --------------------------------------------------------------------------
   3. Layout primitives
   -------------------------------------------------------------------------- */
.wrap {
  width: min(100% - 2.5rem, 68rem);
  margin-inline: auto;
}

.band { padding-block: var(--s6); }
.band--tight { padding-block: var(--s5); }
.band--dark { background: var(--petrol); color: var(--paper); }
.band--card { background: var(--card); }

.prose { max-width: var(--measure); }
.prose p + p { margin-top: var(--s2); }
.prose .h-sub { margin-top: var(--s4); }
.prose > .h-sub:first-child { margin-top: 0; }

/* --------------------------------------------------------------------------
   4. Typography
   -------------------------------------------------------------------------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sage);
  margin: 0 0 var(--s3);
}
.band--dark .eyebrow { color: var(--ochre); }

.h-hero {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6.5vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.028em;
  margin: 0;
}

.h-section {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s3);
}

.h-sub {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
  margin: 0 0 var(--s1);
}

.lede {
  font-size: clamp(1.125rem, 1.9vw, 1.3125rem);
  line-height: 1.5;
  color: var(--petrol);
  max-width: 48ch;
  margin: var(--s3) 0 0;
}
.band--dark .lede { color: #C9D3CC; }
.lede--flush { margin-top: 0; }

/* --------------------------------------------------------------------------
   5. Masthead + navigation
   -------------------------------------------------------------------------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--mist);
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s3);
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 0.6rem;
  height: 1.5rem;
  background: var(--ochre);
  flex: none;
}

.nav { display: flex; align-items: center; gap: var(--s3); }

.nav a {
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--sage);
  padding-block: 0.35rem;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ochre); }

.nav__cta {
  background: var(--petrol);
  color: var(--paper) !important;
  padding: 0.5rem 1rem;
  border-bottom: 0 !important;
  border-radius: var(--radius);
}
.nav__cta:hover { background: var(--ink); }

.navtoggle {
  display: none;
  background: none;
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: 0.6rem;
  cursor: pointer;
}
.navtoggle__bars { position: relative; }
.navtoggle__bars,
.navtoggle__bars::before,
.navtoggle__bars::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  content: "";
}
.navtoggle__bars::before { position: absolute; top: -6px; }
.navtoggle__bars::after  { position: absolute; top: 6px; }

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */
.hero { padding-block: var(--s6) var(--s5); }
.hero__title-accent { color: var(--ochre); }

/* --------------------------------------------------------------------------
   7. Register — the division index. The signature element.
      Each row carries the company's real SIC code as its marker.
   -------------------------------------------------------------------------- */
.register { border-top: 1px solid var(--mist); }

.register__row {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  gap: var(--s3);
  align-items: baseline;
  padding-block: var(--s3);
  border-bottom: 1px solid var(--mist);
  text-decoration: none;
  position: relative;
  transition: background 0.2s;
}
.register__row::after {
  content: "";
  position: absolute;
  left: 0; bottom: -1px;
  height: 2px; width: 0;
  background: var(--ochre);
  transition: width 0.35s ease;
}
.register__row:hover { background: var(--card); }
.register__row:hover::after,
.register__row:focus-visible::after { width: 100%; }

.register__sic {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--ochre);
  letter-spacing: 0.02em;
}

.register__name {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  letter-spacing: -0.015em;
  margin: 0 0 0.25rem;
}

.register__desc {
  display: block;
  margin: 0;
  color: var(--sage);
  font-size: 0.9375rem;
  max-width: 54ch;
}

.register__arrow {
  font-family: var(--mono);
  color: var(--sage);
  transition: transform 0.2s, color 0.2s;
}
.register__row:hover .register__arrow { transform: translateX(4px); color: var(--ochre); }

/* --------------------------------------------------------------------------
   8. Detail list — used on division pages
   -------------------------------------------------------------------------- */
.detail {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1px;
  background: var(--mist);
  border: 1px solid var(--mist);
}
.detail--narrow { grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }

.detail__item { background: var(--card); padding: var(--s3); }

/* --------------------------------------------------------------------------
   9. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  padding: 0.8rem 1.5rem;
  border: 1px solid var(--petrol);
  border-radius: var(--radius);
  background: var(--petrol);
  color: var(--paper);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--ink); border-color: var(--ink); }

.btn--ghost { background: transparent; color: var(--petrol); }
.btn--ghost:hover { background: var(--petrol); color: var(--paper); }

.band--dark .btn {
  background: var(--ochre);
  border-color: var(--ochre);
  color: var(--ink);
}
.band--dark .btn:hover { background: #D08D24; border-color: #D08D24; }

/* --------------------------------------------------------------------------
   10. Forms
   -------------------------------------------------------------------------- */
.form { max-width: 34rem; }
.form__field { margin-bottom: var(--s3); }

.form__label {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.35rem;
}

.form__hint { display: block; font-weight: 400; color: var(--sage); font-size: 0.8125rem; }

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  padding: 0.7rem 0.85rem;
  background: #fff;
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  color: var(--ink);
}
.form__input:focus,
.form__select:focus,
.form__textarea:focus { border-color: var(--petrol); }

.form__textarea { min-height: 9rem; resize: vertical; }

/* Honeypot: hidden from people, visible to dumb bots that fill everything. */
.form__trap {
  position: absolute; left: -9999px;
  width: 1px; height: 1px; overflow: hidden;
}

.notice {
  padding: var(--s2) var(--s3);
  border-left: 3px solid var(--ochre);
  background: var(--card);
  margin-bottom: var(--s3);
}
.notice--ok { border-left-color: var(--petrol); }
.notice__list { margin: var(--s1) 0 0; padding-left: 1.1rem; }

/* Utilities. Deliberately few — if you need a fifth one, you probably need
   a component instead. */
.muted { color: var(--sage); font-size: 0.9375rem; margin: 0; }
.band--dark .muted { color: #A9BBB2; }
.actions { display: flex; flex-wrap: wrap; gap: var(--s2); margin-top: var(--s4); }
.stack-sm { margin-top: var(--s3); }

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.foot {
  background: var(--ink);
  color: #A9B7B0;
  padding-block: var(--s5) var(--s4);
  font-size: 0.9375rem;
}

.foot__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: var(--s4);
  padding-bottom: var(--s4);
  border-bottom: 1px solid #22322E;
}

.foot__head {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ochre);
  margin: 0 0 var(--s2);
  font-weight: 500;
}

.foot__list { list-style: none; margin: 0; padding: 0; }
.foot__list li + li { margin-top: 0.4rem; }
.foot__list a { text-decoration: none; }
.foot__list a:hover { color: var(--paper); text-decoration: underline; }

.foot__legal { padding-top: var(--s3); font-size: 0.8125rem; line-height: 1.6; }
.foot__legal p { margin: 0 0 var(--s1); max-width: 70ch; }
.foot__copy { color: #6E827A; }

/* --------------------------------------------------------------------------
   12. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 62rem) {
  .navtoggle { display: block; }

  .nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--mist);
    padding: var(--s2);
  }
  .nav.is-open { display: flex; }

  .nav a {
    padding: 0.75rem 0.25rem;
    border-bottom: 1px solid var(--mist);
  }
  .nav a[aria-current="page"] { border-bottom-color: var(--ochre); }

  .nav__cta { text-align: center; margin-top: var(--s2); }

  .masthead__inner { position: relative; }
}

@media (max-width: 40rem) {
  :root { --s5: 3rem; --s6: 3.5rem; }

  .register__row { grid-template-columns: 1fr; gap: 0.5rem; }
  .register__arrow { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}