/* ==========================================================================
   OCON Group — division landing page
   Industrial editorial split. Charcoal base, OCON amber left, DD steel right.
   ========================================================================== */

:root {
  /* base — tinted darks, never pure black */
  --ink:        #0e1013;
  --ink-2:      #14171b;
  --steel:      #23282d;   /* from ocon.group */
  --steel-line: #2f353b;
  --paper:      #e6e3dd;   /* warm concrete white */
  --paper-dim:  #a9a7a1;

  /* OCON — civil / demolition */
  --amber:      #ffc009;   /* ocon.group accent */
  --amber-soft: #f0ae2b;
  --amber-deep: #8a5f05;

  /* DD Concrete — steel blue */
  --blue:       #3d8ddb;
  --blue-mid:   #0b4a85;   /* hsl(211 85% 28%) from ddconcrete.co.nz */
  --blue-deep:  #08304f;

  --mast:   4.5rem;
  --shear:  3.5vw;
  --ease:   cubic-bezier(.22, .78, .18, 1);

  --f-display: "Archivo", "Montserrat", system-ui, sans-serif;
  --f-body:    "Montserrat", system-ui, sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--f-body);
  font-size: clamp(.9rem, .35vw + .82rem, 1rem);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* fixed grain — never on a scrolling container */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: .05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--amber); color: var(--ink); }

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

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

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 200;
  background: var(--amber); color: var(--ink);
  padding: .6rem 1rem; font-weight: 600; text-decoration: none;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ==========================================================================
   Masthead
   ========================================================================== */

.masthead {
  position: sticky; top: 0; z-index: 80;
  background: rgba(14, 16, 19, .86);
  background: color-mix(in srgb, var(--ink) 82%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--steel-line);
  transition: background .35s var(--ease), border-color .35s var(--ease);
}
.masthead.is-scrolled {
  background: rgba(14, 16, 19, .97);
  background: color-mix(in srgb, var(--ink) 95%, transparent);
  border-bottom-color: #3a4147;
}

.masthead__inner {
  min-height: var(--mast);
  display: flex;
  align-items: center;
  gap: clamp(.85rem, 2.4vw, 2.75rem);
  padding: .7rem clamp(1rem, 3.4vw, 3rem);
}

.brand { display: inline-flex; flex: 0 0 auto; text-decoration: none; }
.brand__logo {
  width: clamp(132px, 15vw, 190px);
  height: auto;
  transition: filter .4s var(--ease), transform .4s var(--ease);
}
.brand:hover .brand__logo {
  filter: drop-shadow(0 0 14px rgba(255, 192, 9, .5));
  transform: translateY(-1px);
}

.masthead__meta {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: .1rem;
  padding-left: clamp(.85rem, 2.4vw, 2.75rem);
  border-left: 1px solid var(--steel-line);
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  line-height: 1.5;
}
.masthead__disciplines { color: var(--paper); font-weight: 600; }
.masthead__disciplines i {
  display: inline-block;
  width: 3px; height: 3px;
  margin: 0 .5rem;
  vertical-align: middle;
  background: var(--amber);
  transform: rotate(45deg);
}
.masthead__place { color: var(--paper-dim); font-weight: 500; letter-spacing: .1em; }

.masthead__nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(.5rem, 1.6vw, 1.5rem);
}

.masthead__link {
  position: relative;
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 600;
  text-decoration: none;
  color: var(--paper-dim);
  padding: .35rem 0;
  transition: color .3s var(--ease);
}
.masthead__link::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.masthead__link:hover::after, .masthead__link:focus-visible::after { transform: scaleX(1); }
.masthead__link--civil:hover { color: var(--amber); }
.masthead__link--concrete:hover { color: var(--blue); }

.masthead__cta {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .62rem 1.15rem;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  background: var(--amber);
  clip-path: polygon(0 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
  transition: background .3s var(--ease), transform .3s var(--ease);
}
.masthead__cta svg { width: 20px; height: 12px; transition: transform .35s var(--ease); }
.masthead__cta:hover { background: #fff; transform: translateY(-1px); }
.masthead__cta:hover svg { transform: translateX(4px); }

/* surveying sweep along the header edge */
.masthead__sweep {
  position: absolute; left: 0; right: 0; bottom: -1px;
  height: 2px;
  overflow: hidden;
}
.masthead__sweep::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 0, var(--amber) 22%, var(--blue) 78%, transparent 100%);
  transform: translateX(-100%);
  animation: sweep 7s var(--ease) infinite;
}
@keyframes sweep {
  0%   { transform: translateX(-100%); }
  55%  { transform: translateX(100%); }
  100% { transform: translateX(100%); }
}

/* ==========================================================================
   Intro strip — the h1
   ========================================================================== */

.intro {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .75rem 2rem;
  padding: clamp(.85rem, 1.5vw, 1.15rem) clamp(1rem, 3.4vw, 3rem);
  background:
    radial-gradient(120% 180% at 12% 0%, rgba(255, 192, 9, .09), transparent 55%),
    radial-gradient(120% 180% at 88% 0%, rgba(61, 141, 219, .11), transparent 55%),
    var(--ink);
}

.intro__note {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--paper-dim);
  animation: rise 1s var(--ease) .22s both;
}
.intro__pulse {
  flex: 0 0 auto;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #6fd08c;
  box-shadow: 0 0 0 0 rgba(111, 208, 140, .55);
  animation: pulse 2.6s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(111, 208, 140, .5); }
  70%  { box-shadow: 0 0 0 12px rgba(111, 208, 140, 0); }
  100% { box-shadow: 0 0 0 0 rgba(111, 208, 140, 0); }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

/* keep the hidden heading out of the grid flow */
.split > .visually-hidden { position: absolute; }

/* ==========================================================================
   The split
   ========================================================================== */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 34rem;
  min-height: clamp(27rem, calc(100svh - 15.5rem), 42rem);
  transition: grid-template-columns .8s var(--ease);
}
.split.is-a { grid-template-columns: 1.14fr .86fr; }
.split.is-b { grid-template-columns: .86fr 1.14fr; }

.panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  min-width: 0;
}
.panel--civil {
  clip-path: polygon(0 0, 100% 0, calc(100% - var(--shear)) 100%, 0 100%);
}
.panel--concrete {
  margin-left: calc(var(--shear) * -1);
  clip-path: polygon(var(--shear) 0, 100% 0, 100% 100%, 0 100%);
  align-items: flex-start;
}

/* --- media layers --- */
.panel__media { position: absolute; inset: 0; z-index: -2; }

.panel__img {
  position: absolute;
  inset: -1px;
  width: calc(100% + 2px);
  height: calc(100% + 2px);
  object-fit: cover;
  filter: grayscale(.35) contrast(1.06) brightness(.72);
  animation: kenburns 30s var(--ease) infinite alternate;
  will-change: transform;
}
.panel__img--b { opacity: 0; animation: kenburns 30s var(--ease) infinite alternate, swap 24s linear infinite; }
.panel__img--c { opacity: 0; }
.panel--concrete .panel__img { animation-delay: -6s; transform-origin: 70% 40%; }

/* DD Concrete runs three frames: slab pour (first paint) -> driveway -> slabs */
.panel--concrete .panel__img--b {
  animation: kenburns 30s var(--ease) -6s infinite alternate, cycle3-b 36s linear -6s infinite;
}
.panel--concrete .panel__img--c {
  animation: kenburns 30s var(--ease) -6s infinite alternate, cycle3-c 36s linear -6s infinite;
}

@keyframes kenburns {
  from { transform: scale(1.04) translate3d(0, 0, 0); }
  to   { transform: scale(1.17) translate3d(-1.6%, -1.2%, 0); }
}
@keyframes swap {
  0%, 40%   { opacity: 0; }
  50%, 90%  { opacity: 1; }
  100%      { opacity: 0; }
}
@keyframes cycle3-b {
  0%, 30%     { opacity: 0; }
  36%, 94%    { opacity: 1; }
  100%        { opacity: 0; }
}
@keyframes cycle3-c {
  0%, 64%     { opacity: 0; }
  70%, 94%    { opacity: 1; }
  100%        { opacity: 0; }
}

/* brand duotone veil */
.panel::before {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  transition: opacity .6s var(--ease);
}
.panel--civil::before {
  background:
    linear-gradient(196deg, rgba(14, 16, 19, .3) 0%, rgba(14, 16, 19, .78) 58%, rgba(14, 16, 19, .95) 100%),
    linear-gradient(140deg, rgba(138, 95, 5, .42), rgba(14, 16, 19, .1));
}
.panel--concrete::before {
  background:
    radial-gradient(130% 105% at 100% 100%, rgba(8, 30, 48, .6) 0%, transparent 62%),
    linear-gradient(340deg, rgba(14, 16, 19, .26) 0%, rgba(8, 30, 48, .72) 58%, rgba(8, 30, 48, .94) 100%),
    linear-gradient(220deg, rgba(11, 74, 133, .38), rgba(14, 16, 19, .08));
}
.panel:hover::before { opacity: .82; }

/* drifting survey grid */
.panel__grid {
  position: absolute;
  inset: -20%;
  z-index: -1;
  opacity: .16;
  background-image:
    repeating-linear-gradient(0deg, currentColor 0 1px, transparent 1px 68px),
    repeating-linear-gradient(90deg, currentColor 0 1px, transparent 1px 68px);
  -webkit-mask-image: radial-gradient(70% 60% at 50% 40%, #000 0%, transparent 72%);
          mask-image: radial-gradient(70% 60% at 50% 40%, #000 0%, transparent 72%);
  animation: drift 46s linear infinite;
}
.panel--civil .panel__grid { color: var(--amber); }
.panel--concrete .panel__grid { color: var(--blue); }
@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-68px, -68px, 0); }
}

/* --- panel content --- */
.panel__body {
  padding: clamp(1.75rem, 3.6vw, 3.4rem) clamp(1.25rem, 3.4vw, 3.25rem);
  max-width: 34rem;
}
.panel--civil .panel__body { padding-right: calc(clamp(1.25rem, 3.4vw, 3.25rem) + var(--shear)); }
.panel--concrete .panel__body { padding-left: calc(clamp(1.25rem, 3.4vw, 3.25rem) + var(--shear)); }
.panel__body > * { animation: rise .95s var(--ease) both; }
.panel__body > :nth-child(1) { animation-delay: .30s; }
.panel__body > :nth-child(2) { animation-delay: .38s; }
.panel__body > :nth-child(3) { animation-delay: .46s; }
.panel__body > :nth-child(4) { animation-delay: .54s; }
.panel__body > :nth-child(5) { animation-delay: .62s; }

.eyebrow {
  margin: 0 0 1rem;
  display: flex;
  align-items: center;
  gap: .65rem;
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--paper-dim);
}
.eyebrow__num {
  font-family: var(--f-display);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: 0;
  padding-right: .65rem;
  border-right: 1px solid var(--steel-line);
}
.panel--civil .eyebrow__num { color: var(--amber); }
.panel--concrete .eyebrow__num { color: var(--blue); }

.panel__title {
  margin: 0 0 .9rem;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 6.4vw, 5.1rem);
  line-height: .88;
  letter-spacing: -.035em;
  text-transform: uppercase;
}
.panel__title span {
  display: block;
  font-weight: 500;
  font-size: .44em;
  letter-spacing: .16em;
  padding-left: .22em;
}
.panel--civil .panel__title span { color: var(--amber); }
.panel--concrete .panel__title span { color: var(--blue); }

.panel__lede {
  margin: 0 0 1.4rem;
  max-width: 40ch;
  color: #cfcdc7;
}

.chips {
  margin: 0 0 1.9rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}
.chips li {
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .05em;
  padding: .34rem .7rem;
  border: 1px solid var(--steel-line);
  background: rgba(14, 16, 19, .45);
  color: #d7d5cf;
  backdrop-filter: blur(3px);
}
.panel--civil .chips li:nth-child(odd)  { border-color: rgba(255, 192, 9, .42); }
.panel--concrete .chips li:nth-child(odd) { border-color: rgba(61, 141, 219, .48); }

/* the entry button */
.enter {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .85rem;
  padding: 1rem 1.6rem;
  overflow: hidden;
  text-decoration: none;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(.82rem, 1.1vw, .95rem);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, calc(100% - 14px) 100%, 0 100%);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.panel--civil .enter   { background: var(--amber); box-shadow: 0 12px 34px -18px rgba(255, 192, 9, .8); }
.panel--concrete .enter { background: var(--blue); color: #fff; box-shadow: 0 12px 34px -18px rgba(61, 141, 219, .85); }
.enter:hover { transform: translateY(-3px); }
.panel--civil .enter:hover   { box-shadow: 0 20px 42px -20px rgba(255, 192, 9, .95); }
.panel--concrete .enter:hover { box-shadow: 0 20px 42px -20px rgba(61, 141, 219, .95); }

/* wipe fill on hover */
.enter::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--paper);
  transform: translateX(-101%);
  transition: transform .45s var(--ease);
}
.panel--concrete .enter::before { background: #fff; }
.enter:hover::before { transform: translateX(0); }
.enter__label, .enter__host, .enter__arrow { position: relative; z-index: 1; }
.panel--concrete .enter:hover .enter__label,
.panel--concrete .enter:hover .enter__host,
.panel--concrete .enter:hover .enter__arrow { color: var(--blue-mid); }

.enter__host {
  font-family: var(--f-body);
  font-size: .68rem;
  letter-spacing: .04em;
  text-transform: lowercase;
  opacity: .72;
}
.enter__arrow { width: 24px; height: 14px; transition: transform .4s var(--ease); }
.enter:hover .enter__arrow { transform: translateX(6px); }

/* ==========================================================================
   Directory
   ========================================================================== */

.directory {
  padding: clamp(3rem, 7vw, 6rem) clamp(1rem, 3.4vw, 3rem) clamp(2.5rem, 5vw, 4rem);
  background:
    linear-gradient(180deg, var(--ink-2), var(--ink)),
    var(--ink-2);
  border-top: 1px solid var(--steel-line);
}

.directory__cols {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
}

.dir__title {
  margin: 0 0 1.1rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid var(--steel-line);
  font-family: var(--f-display);
  font-size: .84rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.dir--civil .dir__title { color: var(--amber); }
.dir--concrete .dir__title { color: var(--blue); }

.dir__list {
  margin: 0; padding: 0;
  list-style: none;
  columns: 2;
  column-gap: 2rem;
}
.dir__list li { break-inside: avoid; margin-bottom: .1rem; }
.dir__list a {
  display: block;
  padding: .5rem 0 .5rem 1.15rem;
  position: relative;
  font-size: .82rem;
  text-decoration: none;
  color: #c9c7c1;
  border-bottom: 1px solid rgba(47, 53, 59, .55);
  transition: color .28s var(--ease), padding-left .28s var(--ease);
}
.dir__list a::before {
  content: "";
  position: absolute; left: 0; top: 50%;
  width: 5px; height: 1px;
  background: currentColor;
  opacity: .5;
  transition: width .28s var(--ease), opacity .28s var(--ease);
}
.dir__list a:hover { padding-left: 1.5rem; }
.dir__list a:hover::before { width: 12px; opacity: 1; }
.dir--civil .dir__list a:hover { color: var(--amber); }
.dir--concrete .dir__list a:hover { color: var(--blue); }

/* scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: clamp(2.25rem, 4.5vw, 3.5rem) clamp(1rem, 3.4vw, 3rem) 1.75rem;
  background: var(--ink);
  border-top: 1px solid var(--steel-line);
}
.footer__inner {
  display: grid;
  gap: 1.75rem clamp(2rem, 5vw, 4.5rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  align-items: start;
}
.footer__mark {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 1.6rem;
  line-height: .92;
  letter-spacing: -.03em;
  text-transform: uppercase;
}
.footer__mark span {
  display: block;
  font-weight: 500;
  font-size: .5em;
  letter-spacing: .2em;
  color: var(--amber);
}
.footer__contact { margin: 0; }
.footer__contact dt {
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--paper-dim);
}
.footer__contact dd { margin: .15rem 0 .9rem; }
.footer__contact dd a {
  text-decoration: none;
  border-bottom: 1px solid var(--steel-line);
  padding-bottom: 2px;
  transition: color .28s var(--ease), border-color .28s var(--ease);
}
.footer__contact dd:nth-of-type(1) a:hover { color: var(--amber); border-color: var(--amber); }
.footer__contact dd:nth-of-type(2) a:hover { color: var(--blue); border-color: var(--blue); }
.footer__areas { margin: 0; color: var(--paper-dim); font-size: .82rem; max-width: 46ch; }

.footer__legal {
  margin: clamp(1.75rem, 3.5vw, 2.75rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--steel-line);
  font-size: .68rem;
  letter-spacing: .07em;
  color: #7d7a74;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  :root { --shear: 0px; }

  .masthead__inner { flex-wrap: wrap; gap: .6rem 1rem; }
  .masthead__meta {
    order: 3;
    flex-direction: row;
    flex-wrap: wrap;
    gap: .35rem .8rem;
    padding-left: 0;
    border-left: 0;
    font-size: .6rem;
    width: 100%;
  }
  .masthead__nav { gap: .55rem; }
  .masthead__link { display: none; }
  .masthead__cta { padding: .55rem .9rem; font-size: .62rem; }

  .split { grid-template-columns: 1fr; min-height: 0; }
  .split.is-a, .split.is-b { grid-template-columns: 1fr; }

  .panel,
  .panel--civil,
  .panel--concrete {
    clip-path: none;
    margin-left: 0;
    align-items: flex-end;
    min-height: min(60svh, 33rem);
  }
  .panel--concrete { border-top: 2px solid var(--blue); }
  .panel__body,
  .panel--civil .panel__body,
  .panel--concrete .panel__body {
    padding: 2.5rem 1.35rem 2.75rem;
    max-width: 100%;
  }
  .panel__title { font-size: clamp(2.75rem, 15vw, 4.5rem); }
  .enter { width: 100%; justify-content: space-between; padding: 1.05rem 1.35rem; }
  .dir__list { columns: 1; }
}

@media (max-width: 560px) {
  /* the region line is repeated in the footer — drop it from the sticky bar */
  .masthead__place { display: none; }
}

@media (max-width: 420px) {
  .chips li { font-size: .64rem; }
}

/* pointer-less devices get no hover-expansion jitter */
@media (hover: none) {
  .split.is-a, .split.is-b { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .panel__img--b, .panel__img--c { opacity: 0; }
  .split, .split.is-a, .split.is-b { transition: none; }
}

@media print {
  body { background: #fff; color: #000; }
  .panel__media, .masthead__sweep, body::after { display: none; }
}