/* ACE11 — design tokens */
:root {
  --ink: #141414;
  --ink-soft: #3a3a3a;
  --muted: #6e6a64;
  --line: #e4dfd7;
  --paper: #ffffff;
  --sand: #f6f3ee;
  --night: #0f0f0f;
  --bronze: #b08d57;
  --bronze-dark: #8c6e40;
  --bronze-ink: #83673b; /* bronze for small text on white and sand (4.5:1+) */
  --serif: "Cormorant Garamond", "Times New Roman", serif;
  --sans: "Inter", "Helvetica Neue", Arial, sans-serif;
  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 2px;
  --ease-out: cubic-bezier(.23, 1, .32, 1);
}

*, *::before, *::after { box-sizing: border-box; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
::selection { background: var(--bronze); color: #fff; }
:focus-visible { outline: 2px solid var(--bronze); outline-offset: 3px; }
.skip { position: absolute; left: var(--gutter); top: -100px; z-index: 200; background: var(--ink); color: #fff; padding: 12px 18px; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; }
.skip:focus { top: 12px; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.1; margin: 0 0 .5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(44px, 7vw, 96px); }
h2 { font-size: clamp(34px, 4.4vw, 56px); }
h3 { font-size: clamp(22px, 2.2vw, 28px); }
h1, h2, h3 { text-wrap: balance; }
p, .lead { text-wrap: pretty; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--bronze-ink);
  margin-bottom: 18px;
  font-weight: 500;
}
.lead { font-size: clamp(18px, 1.6vw, 21px); color: var(--ink-soft); max-width: 720px; }
.section { padding: clamp(72px, 10vw, 140px) 0; }
.section--sand { background: var(--sand); }
.section--dark { background: var(--night); color: #f3efe8; }
.section--dark .lead, .section--dark p { color: #c9c3b9; }
.section--dark .eyebrow { color: var(--bronze); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 32px; margin-bottom: 56px; flex-wrap: wrap; }
.section-head h2 { margin: 0; max-width: 720px; }

.btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 28px;
  font-size: 13px; letter-spacing: .16em; text-transform: uppercase; font-weight: 500;
  border: 1px solid var(--ink); background: var(--ink); color: #fff;
  border-radius: var(--radius); cursor: pointer;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease, transform .16s var(--ease-out);
}
.btn:hover { background: var(--bronze-dark); border-color: var(--bronze-dark); }
.btn:active { transform: scale(.97); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--light { background: #fff; color: var(--ink); border-color: #fff; }
.btn--light:hover { background: var(--bronze-dark); color: #fff; border-color: var(--bronze-dark); }
.link-arrow { font-size: 13px; letter-spacing: .16em; text-transform: uppercase; font-weight: 500; border-bottom: 1px solid currentColor; padding-bottom: 4px; }
.link-arrow:hover { color: var(--bronze-ink); }

/* header */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header .bar { display: flex; align-items: center; justify-content: space-between; height: 84px; }
.logo { display: flex; flex-direction: column; line-height: 1; }
.logo-mark { font-family: var(--sans); font-weight: 300; font-size: 30px; letter-spacing: .32em; }
.logo-mark b { font-weight: 300; color: var(--bronze); }
.logo-sub { font-size: 9px; letter-spacing: .22em; text-transform: uppercase; margin-top: 6px; opacity: .8; }
.nav { display: flex; gap: 34px; align-items: center; }
.nav a { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; font-weight: 500; position: relative; }
.nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease-out); }
.nav a[aria-current="page"]::after { transform: none; }
@media (hover: hover) and (pointer: fine) { .nav a:hover::after { transform: none; } }
.nav .btn { padding: 12px 20px; }
.site-header.on-dark { color: #fff; }
.site-header.on-dark .nav .btn { background: transparent; border-color: rgba(255,255,255,.7); }
.site-header.on-dark .nav .btn:hover { background: var(--bronze-dark); border-color: var(--bronze-dark); }
.site-header.solid { background: rgba(255,255,255,.97); color: var(--ink); box-shadow: 0 1px 0 var(--line); }
.site-header.solid .nav .btn { background: var(--ink); border-color: var(--ink); color: #fff; }
.menu-toggle { display: none; background: none; border: 0; color: inherit; cursor: pointer; padding: 9px; min-width: 44px; min-height: 44px; }
.menu-toggle span { display: block; width: 26px; height: 1px; background: currentColor; margin: 7px 0; }
.page-top { padding-top: 84px; }

/* hero */
.hero { position: relative; min-height: 100svh; display: flex; align-items: flex-end; color: #fff; overflow: hidden; }
.hero img.bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transform: scale(1.04); animation: heroZoom 14s ease-out forwards; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,.35) 0%, rgba(0,0,0,.05) 35%, rgba(0,0,0,.65) 100%); }
.hero .wrap { position: relative; z-index: 1; padding-bottom: clamp(56px, 9vh, 110px); width: 100%; }
.hero h1 { max-width: 900px; margin-bottom: 24px; }
.hero .lead { color: rgba(255,255,255,.88); margin-bottom: 36px; }
.hero-meta { display: flex; justify-content: space-between; align-items: end; gap: 24px; flex-wrap: wrap; }
.hero-caption { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: rgba(255,255,255,.7); max-width: 320px; text-align: right; }
@keyframes heroZoom { to { transform: scale(1); } }

/* page hero */
.page-hero { padding: clamp(120px, 16vw, 200px) 0 clamp(48px, 6vw, 80px); }
.page-hero h1 { font-size: clamp(42px, 6vw, 80px); max-width: 980px; }
.page-hero--image { position: relative; color: #fff; min-height: 70svh; display: flex; align-items: flex-end; }
.page-hero--image img.bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.page-hero--image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,.2), rgba(0,0,0,.65)); }
.page-hero--image .wrap { position: relative; z-index: 1; width: 100%; }
.page-hero--image .lead { color: rgba(255,255,255,.88); }

/* grids */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.split img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.services { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service { padding: 40px 36px 44px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .3s ease; }
.service:hover { background: var(--sand); }
.service .num { font-family: var(--serif); font-size: 18px; color: var(--bronze-ink); display: block; margin-bottom: 26px; }
.service h3 { margin-bottom: 12px; }
.service p { color: var(--muted); margin: 0; }
.section--dark .services, .section--dark .service { border-color: #2a2a2a; }
.section--dark .service:hover { background: #181818; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat strong { display: block; font-family: var(--serif); font-weight: 500; font-size: clamp(40px, 5vw, 64px); line-height: 1; color: var(--bronze); margin-bottom: 10px; }
.stat span { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }

/* projects */
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.filter { border: 1px solid var(--line); background: none; padding: 10px 18px; min-height: 44px; font: 500 12px var(--sans); letter-spacing: .14em; text-transform: uppercase; cursor: pointer; border-radius: 40px; color: var(--ink); }
.filter { transition: background-color .15s ease, color .15s ease, border-color .15s ease; }
.filter[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
@media (hover: hover) and (pointer: fine) { .filter:hover { border-color: var(--ink); } }
.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px 28px; }
.projects--featured { grid-template-columns: repeat(2, 1fr); }
.card { display: block; }
.card .ph { overflow: hidden; aspect-ratio: 4/3; background: var(--sand); margin-bottom: 18px; }
.card img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease-out); }
@media (hover: hover) and (pointer: fine) { .card:hover img { transform: scale(1.04); } }
.card .meta { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.card h3 { margin: 0; transition: color .2s ease; }
.card:hover h3 { color: var(--bronze); }
.card[hidden] { display: none; }

/* clients */
.clients { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.client { display: flex; align-items: center; justify-content: center; min-height: 120px; padding: 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font-family: var(--serif); font-size: 22px; text-align: center; color: var(--ink-soft); }
.client img { max-height: 46px; width: auto; filter: grayscale(1); opacity: .8; transition: filter .3s ease, opacity .3s ease; }
.client:hover img { filter: none; opacity: 1; }

/* countries */
.countries { display: flex; flex-wrap: wrap; gap: 12px 32px; font-family: var(--serif); font-size: clamp(24px, 2.6vw, 34px); }
.countries span { white-space: nowrap; }
.countries span:not(:last-child)::after { content: "·"; margin-left: 32px; color: var(--bronze); }

/* process */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: s; }
.step { border-top: 1px solid currentColor; padding-top: 22px; }
.step::before { counter-increment: s; content: "0" counter(s); font-family: var(--serif); color: var(--bronze-ink); font-size: 20px; display: block; margin-bottom: 14px; }
.step h3 { font-size: 24px; }

/* project detail */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 28px 0; margin-bottom: 64px; }
.facts dt { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.facts dd { margin: 0; font-family: var(--serif); font-size: 22px; }
.prose { max-width: 760px; font-size: 18px; color: var(--ink-soft); }
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 64px; }
.gallery img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; cursor: zoom-in; }
.gallery img:first-child { grid-column: 1 / -1; aspect-ratio: 16/8; }
.next-project { display: flex; justify-content: space-between; align-items: center; gap: 24px; border-top: 1px solid var(--line); padding-top: 40px; margin-top: 80px; flex-wrap: wrap; }
.lightbox { position: fixed; inset: 0; background: rgba(10,10,10,.94); display: flex; align-items: center; justify-content: center; z-index: 100; padding: 24px; cursor: zoom-out; opacity: 0; visibility: hidden; transition: opacity .2s var(--ease-out), visibility 0s linear .2s; }
.lightbox.open { opacity: 1; visibility: visible; transition-delay: 0s; }
.lightbox img { max-height: 90vh; width: auto; transform: scale(.97); transition: transform .25s var(--ease-out); }
.lightbox.open img { transform: none; }
.lightbox:focus { outline: none; }
.lightbox img { cursor: pointer; user-select: none; -webkit-user-drag: none; }
.lb-btn { position: absolute; display: flex; align-items: center; justify-content: center; width: 56px; height: 56px; border: 0; border-radius: 50%; background: rgba(255,255,255,.08); color: #fff; font: 300 40px/1 var(--font-sans, sans-serif); cursor: pointer; transition: background .2s var(--ease-out); }
.lb-btn:hover { background: rgba(255,255,255,.18); }
.lb-btn:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }
.lb-prev { left: 20px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 20px; top: 50%; transform: translateY(-50%); }
.lb-close { top: 16px; right: 16px; width: 48px; height: 48px; font-size: 32px; }
.lb-count { position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.75); font-size: 13px; letter-spacing: .12em; }
.lightbox.single .lb-prev, .lightbox.single .lb-next, .lightbox.single .lb-count { display: none; }
@media (max-width: 700px) { .lb-prev, .lb-next { width: 44px; height: 44px; font-size: 32px; background: rgba(0,0,0,.35); } .lb-prev { left: 6px; } .lb-next { right: 6px; } }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(40px, 6vw, 96px); }
.offices { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; margin-top: 40px; }
.office h3 { font-size: 22px; margin-bottom: 6px; }
.office p { color: var(--muted); font-size: 15px; margin: 0; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 20px; }
.form .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 8px; color: var(--ink-soft); }
.field input, .field select, .field textarea {
  width: 100%; padding: 14px 0; border: 0; border-bottom: 1px solid #cfc8bd; background: transparent;
  font: 16px var(--sans); color: var(--ink); border-radius: 0; outline: none; transition: border-color .2s;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--bronze); }
.field .err { color: #a3352b; font-size: 13px; margin-top: 6px; min-height: 0; }
.field [aria-invalid="true"] { border-color: #a3352b; }
.req { color: var(--bronze-ink); margin-left: 4px; }
.form-error { color: #a3352b; }
.thanks { padding: 48px; background: var(--sand); font-family: var(--serif); font-size: 26px; line-height: 1.35; }
.skeleton { height: 420px; background: linear-gradient(90deg, var(--sand), #fbf9f6, var(--sand)); background-size: 200% 100%; animation: sk 1.4s infinite; }
@keyframes sk { to { background-position: -200% 0; } }

/* CTA + footer */
.cta { text-align: center; }
.cta h2 { max-width: 820px; margin: 0 auto 28px; }
.site-footer { background: var(--night); color: #bdb6ab; padding: 80px 0 40px; font-size: 14px; }
.site-footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 64px; }
.site-footer h4 { font: 500 12px var(--sans); letter-spacing: .18em; text-transform: uppercase; color: #fff; margin: 0 0 18px; }
.site-footer a:hover { color: var(--bronze-ink); }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer .logo { color: #fff; margin-bottom: 20px; }
.site-footer .bottom { border-top: 1px solid #2a2a2a; padding-top: 28px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; letter-spacing: .06em; }

/* reveal */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { transform: none; transition: opacity .4s ease; }
  .hero img.bg { animation: none; transform: none; }
  .btn:active { transform: none; }
  .lightbox img { transform: none; }
}

/* responsive */
@media (max-width: 1000px) {
  .services, .projects { grid-template-columns: repeat(2, 1fr); }
  .stats, .steps { grid-template-columns: repeat(2, 1fr); }
  .clients { grid-template-columns: repeat(3, 1fr); }
  .site-footer .cols { grid-template-columns: 1fr 1fr; }
  .facts { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1180px) {
  .menu-toggle { display: block; }
  .nav { position: fixed; inset: 84px 0 auto 0; background: #fff; color: var(--ink); flex-direction: column; align-items: flex-start; gap: 22px; padding: 28px var(--gutter) 36px; box-shadow: 0 12px 24px rgba(0,0,0,.08); transform: translateY(-140%); visibility: hidden; transition: transform .28s var(--ease-out), visibility 0s linear .28s; }
  .nav.open { transform: none; visibility: visible; transition-delay: 0s; }
  .site-header.on-dark .nav .btn, .nav .btn { background: var(--ink); border-color: var(--ink); color: #fff; }
}
@media (max-width: 820px) {
  .split, .contact-grid { grid-template-columns: 1fr; }
  .projects--featured { grid-template-columns: 1fr; }
  .hero-caption { text-align: left; }
}
@media (max-width: 600px) {
  .services, .projects, .stats, .steps, .offices, .gallery, .form { grid-template-columns: 1fr; }
  .clients { grid-template-columns: repeat(2, 1fr); }
  .site-footer .cols { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr 1fr; }
  .gallery img:first-child { aspect-ratio: 4/3; }
}

/* real ACE11 logo (dark on white jpg): header is always white so it sits naturally; footer is white too */
.logo img { height: 40px; width: auto; max-width: none; align-self: flex-start; object-fit: contain; }
.site-footer { background: #fff; color: var(--muted); border-top: 1px solid var(--line); }
.site-footer h4 { color: var(--ink); }
.site-footer .bottom { border-top-color: var(--line); }
.hero .eyebrow, .page-hero--image .eyebrow { color: #c39566; text-shadow: 0 1px 2px rgba(0,0,0,.6), 0 1px 14px rgba(0,0,0,.55); }
.hero-caption { text-shadow: 0 1px 10px rgba(0,0,0,.5); }

/* BIM: LOD stages and drawings grid */
.lod { list-style: none; margin: 56px 0 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; counter-reset: none; }
.lod li { background: #fff; border-top: 4px solid var(--lod); padding: 22px 20px 26px; }
.lod svg { display: block; width: 100%; height: auto; margin-bottom: 18px; }
.lod-level { display: block; font-family: var(--serif); font-size: 24px; color: var(--lod); margin-bottom: 6px; }
.lod h3 { font-size: 16px; margin: 0 0 10px; }
.lod p { font-size: 14px; line-height: 1.6; margin: 0; color: var(--muted); }
.lod-note { margin: 28px 0 0; max-width: 820px; font-size: 15px; color: var(--muted); border-left: 3px solid var(--bronze); padding-left: 16px; }
.gallery--grid { grid-template-columns: repeat(3, 1fr); margin-top: 40px; }
.gallery--grid img, .gallery--grid img:first-child { grid-column: auto; aspect-ratio: 4/3; background: #fff; }
@media (max-width: 1100px) { .lod { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .lod, .gallery--grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .lod, .gallery--grid { grid-template-columns: 1fr; } }

/* services in detail, sustainability pillars, events */
.detail { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; align-items: start; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 28px 40px; }
.checks li { border-top: 1px solid var(--line); padding-top: 18px; }
.checks h3 { font-size: 18px; margin: 0 0 8px; }
.checks h3::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--bronze); margin: 0 12px 2px 0; }
.checks p { margin: 0; font-size: 15px; color: var(--muted); }
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; }
.pillar { background: #fff; padding: 28px 24px; border-top: 4px solid #3f7a55; }
.pillar h3 { font-size: 18px; margin: 0 0 10px; }
.pillar p { margin: 0; font-size: 15px; color: var(--muted); }
.events { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 28px; }
.event .ph { aspect-ratio: 4/3; overflow: hidden; background: var(--sand, #f4f1ec); margin-bottom: 16px; }
.event .ph img { width: 100%; height: 100%; object-fit: cover; }
.event .meta { display: flex; justify-content: space-between; align-items: center; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--bronze-ink); }
.event h3 { margin: 8px 0 4px; }
.event p { margin: 0; color: var(--muted); }
.event .badge:empty { display: none; }
.event .badge { background: var(--bronze-dark); color: #fff; padding: 3px 10px; font-size: 11px; }
.event.is-past { opacity: .6; }
.events-past { margin-top: 96px; }
.events-past h2 { margin-bottom: 40px; }
@media (max-width: 1000px) { .detail { grid-template-columns: 1fr; gap: 32px; } .pillars { grid-template-columns: 1fr 1fr; } .events { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .checks, .pillars, .events { grid-template-columns: 1fr; } }

/* who we work with */
.audiences { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.audience { display: block; border-top: 2px solid var(--bronze); padding-top: 20px; }
.audience h3 { font-size: 20px; margin: 0 0 10px; }
.audience p { margin: 0; font-size: 15px; color: var(--muted); }
.audience:hover h3 { color: var(--bronze); }
.checks li p { color: var(--ink-soft); font-size: 16px; }
.detail .btn { margin-top: 12px; }
@media (max-width: 1100px) { .audiences { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .audiences { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .audiences { grid-template-columns: 1fr; } }