/* ============================================================
   AQUALIFT, water infrastructure engineering
   Design system: survey-grade engineering aesthetic.
   Palette: ink navy / deep ocean / steel / paper / signal cyan,
   tuned to the Aqualift mark (navy + cyan gradient).
   Type: Archivo (display + body), IBM Plex Mono (survey labels).
   ============================================================ */

:root {
  --ink: #0b1826;          /* near-black navy, from the wordmark */
  --deep: #10293c;         /* deep ocean panel */
  --deep-2: #14334b;       /* raised dark panel */
  --steel: #43617a;
  --mist: #a7bcc9;         /* muted text on dark */
  --paper: #f3f6f8;        /* cool off-white */
  --white: #ffffff;
  --body: #263845;         /* body text on light */
  --signal: #3fc0ec;       /* aqua accent, from the A mark */
  --signal-deep: #0b74aa;  /* accessible blue on light bg, 4.7:1 on --paper */
  --line-dark: rgba(158, 190, 202, 0.18);
  --line-light: rgba(24, 48, 62, 0.14);
  --line: rgba(24, 48, 62, 0.14);
  --shadow: 0 18px 50px -18px rgba(8, 22, 32, 0.35);
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --maxw: 1280px;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
}

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

html { scroll-behavior: smooth; }

/* The header is sticky, so anchored headings need to clear it or the browser
   parks them underneath. */
section[id], article[id], div[id], h2[id], h3[id] { scroll-margin-top: 6.5rem; }

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

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

a { color: var(--signal-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }

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

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--white); padding: .6rem 1rem; z-index: 200;
}
.skip-link:focus { left: 0; }

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 .6em;
  font-weight: 700;
}

.display {
  font-size: clamp(2.3rem, 5.4vw, 4.4rem);
  font-weight: 750;
  letter-spacing: -0.025em;
}

h2, .h2 { font-size: clamp(1.7rem, 3.4vw, 2.7rem); }
h3, .h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

p.lede {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  line-height: 1.55;
  color: var(--body);
  max-width: 46ch;
}

.on-dark h1, .on-dark h2, .on-dark h3, .on-dark h4 { color: var(--white); }
.on-dark p, .on-dark li { color: #c3d3dd; }
.on-dark p.lede { color: #d3e0e8; }
.on-dark a { color: var(--signal); }
.on-dark a:hover { color: var(--white); }

/* Light-surface components keep light-surface text, even when they sit
   inside an .on-dark section: white headings on a white card are invisible.
   Cards deliberately darkened with inline styles still override these. */
.on-dark .cap-card,
.on-dark .product-card,
.on-dark .project-card,
.on-dark .arch-card,
.on-dark .proof,
.on-dark .process-step { color: var(--body); }

.on-dark .cap-card h2, .on-dark .cap-card h3, .on-dark .cap-card h4,
.on-dark .product-card h3,
.on-dark .project-card h3,
.on-dark .arch-card h3,
.on-dark .process-step h3,
.on-dark .proof b { color: var(--ink); }

.on-dark .cap-card p, .on-dark .cap-card li,
.on-dark .product-card p, .on-dark .product-card dd,
.on-dark .project-card p,
.on-dark .arch-card p,
.on-dark .process-step p { color: var(--body); }

.on-dark .cap-card .num,
.on-dark .product-card .mat,
.on-dark .project-card .tag,
.on-dark .arch-card .arch-kicker,
.on-dark .process-step .num { color: var(--signal-deep); }

.on-dark .cap-card ul li,
.on-dark .product-card dt,
.on-dark .proof span,
.on-dark .arch-card .arch-file { color: var(--steel); }

.on-dark .cap-card a,
.on-dark .product-card a,
.on-dark .arch-card a { color: var(--ink); }
.on-dark .cap-card a:hover,
.on-dark .product-card a:hover,
.on-dark .arch-card a:hover { color: var(--signal-deep); }

/* Survey label, the recurring micro-label device */
.label {
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .22em;
  color: var(--steel);
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 1.1rem;
}
.label::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--signal-deep);
}
.on-dark .label { color: var(--mist); }
.on-dark .label::before { background: var(--signal); }

.el-mark { /* elevation marker, right-aligned in section heads */
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  color: var(--steel);
  white-space: nowrap;
}
.on-dark .el-mark { color: rgba(159, 180, 191, .75); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .02em;
  text-decoration: none;
  padding: .85rem 1.6rem;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
  cursor: pointer;
}
.btn::after { content: "→"; font-family: var(--font-mono); transition: transform .18s ease; }
.btn:hover { background: var(--ink); color: var(--white); }
.btn:hover::after { transform: translateX(4px); }

.btn--solid { background: var(--ink); color: var(--white); }
.btn--solid:hover { background: var(--signal-deep); border-color: var(--signal-deep); }

.btn--signal { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.btn--signal:hover { background: transparent; border-color: var(--signal); color: var(--signal); }

.on-dark .btn, .hero .btn { border-color: rgba(255,255,255,.55); color: var(--white); }
.on-dark .btn:hover, .hero .btn:hover { background: var(--white); color: var(--ink); }
.on-dark .btn--signal, .hero .btn--signal { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.on-dark .btn--signal:hover, .hero .btn--signal:hover { background: transparent; color: var(--signal); }

.btn--bare { border: none; padding: .4rem 0; }
.btn--bare:hover { background: transparent; color: var(--signal-deep); }

/* ---------- Header / navigation ---------- */

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 22, 33, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-dark);
}

.nav-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 2rem;
  min-height: 72px;
}

.brand {
  display: flex; align-items: center; text-decoration: none; line-height: 1;
  padding: .55rem 0;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 800; font-size: 1.3rem; letter-spacing: .04em;
  color: var(--white);
}
.brand-name .tick { color: var(--signal); }
.brand-tag {
  font-family: var(--font-mono);
  font-size: .55rem; letter-spacing: .3em; text-transform: uppercase;
  color: var(--mist); margin-top: .2rem;
}

.nav-list {
  display: flex; align-items: center; gap: 1.6rem;
  list-style: none; margin: 0; padding: 0;
}
.nav-list > li { position: relative; }
.nav-list a, .nav-list button.nav-link {
  font-family: var(--font-display);
  font-size: .84rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: #cfdde3; text-decoration: none;
  background: none; border: none; cursor: pointer; padding: .4rem 0;
  border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.nav-list a:hover, .nav-list button.nav-link:hover { color: var(--signal); }
.nav-list a[aria-current="page"] { color: var(--white); border-bottom-color: var(--signal); }

.nav-cta { margin-left: .5rem; }
.nav-cta .btn { padding: .55rem 1.1rem; font-size: .8rem; }

/* Mega menu */
.mega {
  position: absolute; left: 50%; transform: translateX(-50%);
  top: calc(100% + 14px);
  width: min(920px, 92vw);
  background: var(--deep);
  border: 1px solid var(--line-dark);
  box-shadow: var(--shadow);
  padding: 1.8rem 2rem;
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.7rem 1.6rem;
}
/* Nine product links would make a fourth column far longer than the rest,
   so products run full width underneath in a 3 x 3 block. */
.mega-products { grid-column: 1 / -1; border-top: 1px solid var(--line-dark); padding-top: 1.4rem; }
.mega-products ul { grid-template-columns: repeat(3, 1fr); gap: .55rem 1.6rem; }
.mega.open { display: grid; }
.mega h4 {
  font-family: var(--font-mono); font-weight: 500;
  font-size: .65rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--signal); margin-bottom: .8rem;
}
.mega ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }
.mega ul a {
  font-family: var(--font-body); text-transform: none; letter-spacing: 0;
  font-size: .92rem; font-weight: 500; color: #d9e5ea; border: none;
  display: block; padding: .2rem 0;
}
.mega ul a:hover { color: var(--signal); }

.nav-toggle {
  display: none;
  background: none; border: 1px solid rgba(255,255,255,.4);
  color: var(--white); font-family: var(--font-mono); font-size: .7rem;
  letter-spacing: .2em; text-transform: uppercase;
  padding: .5rem .9rem; cursor: pointer;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background:
    linear-gradient(160deg, rgba(11,22,33,.55) 0%, rgba(11,22,33,.82) 55%, var(--ink) 100%),
    radial-gradient(120% 90% at 78% 10%, #1d4a5e 0%, #123243 42%, #0b1621 100%);
  color: var(--white);
  overflow: hidden;
}
.hero-inner {
  position: relative; z-index: 2;
  padding: clamp(5rem, 12vh, 9rem) 0 clamp(4rem, 9vh, 7rem);
  max-width: 760px;
}
.hero .display { color: var(--white); }
.hero .lede { color: #c9d8df; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.2rem; }
.hero-micro {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .26em;
  text-transform: uppercase; color: var(--mist);
  margin-top: 3rem; display: block;
}
.hero-micro b { color: var(--signal); font-weight: 500; }

/* Survey overlay artwork (SVG) */
.hero-survey {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  opacity: .9;
}
.hero-survey svg { width: 100%; height: 100%; }

.scanline {
  position: absolute; left: 0; right: 0; height: 1px; z-index: 1;
  background: linear-gradient(90deg, transparent, rgba(46,211,220,.5), transparent);
  animation: scan 9s linear infinite;
  pointer-events: none;
}
@keyframes scan {
  0% { top: 8%; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { top: 92%; opacity: 0; }
}

/* ---------- Sections ---------- */

.section { padding: clamp(3.5rem, 9vw, 7rem) 0; }
.section--dark { background: var(--ink); }
.section--deep { background: var(--deep); }
.section--white { background: var(--white); }

.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 2rem; margin-bottom: clamp(2rem, 5vw, 3.5rem);
}
.section-head > div:first-child { max-width: 640px; }

.rule { border: none; border-top: 1px solid var(--line-light); margin: 0; }
.on-dark .rule, .section--dark .rule, .section--deep .rule { border-color: var(--line-dark); }

/* ---------- Process rail (Inspect → Monitor) ---------- */

.process {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-top: 1px solid var(--line-light);
  border-left: 1px solid var(--line-light);
}
.process-step {
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  padding: 1.6rem 1.4rem 1.8rem;
  position: relative;
  background: var(--white);
  transition: background .2s ease;
}
.process-step:hover { background: var(--paper); }
.process-step .num {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .2em;
  color: var(--signal-deep); display: block; margin-bottom: 1.6rem;
}
.process-step h3 { font-size: 1.05rem; letter-spacing: .06em; text-transform: uppercase; }
.process-step p { font-size: .92rem; margin: 0; color: var(--body); }
.process-step::after {
  content: "→"; font-family: var(--font-mono);
  position: absolute; right: .9rem; top: 1.45rem; color: var(--line-light);
}
.process-step:last-child::after { content: "⟳"; color: var(--signal-deep); }

/* ---------- Capability cards ---------- */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.2rem;
}
.cap-card {
  background: var(--white);
  border: 1px solid var(--line-light);
  padding: 2rem 1.8rem 1.6rem;
  display: flex; flex-direction: column; gap: .9rem;
  position: relative;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.cap-card:hover {
  border-color: var(--signal-deep);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.cap-card .num {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .22em;
  color: var(--signal-deep);
}
.cap-card ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: .4rem .6rem;
}
.cap-card ul li {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .08em;
  color: var(--steel); border: 1px solid var(--line-light);
  padding: .25rem .55rem;
}
.cap-card p { margin: 0; font-size: .95rem; flex-grow: 1; }
.cap-card .cap-link {
  font-family: var(--font-display); font-weight: 600; font-size: .88rem;
  text-decoration: none; color: var(--ink);
  margin-top: .4rem; display: inline-flex; gap: .5rem; align-items: center;
}
.cap-card .cap-link::after { content: "→"; font-family: var(--font-mono); color: var(--signal-deep); transition: transform .18s ease; }
.cap-card:hover .cap-link::after { transform: translateX(4px); }

/* Whole-card click target: the single .cap-link anchor stretches over the card,
   so there is one anchor per card and no nesting. */
.cap-card--clickable .cap-link::before { content: ""; position: absolute; inset: 0; }
.cap-card--clickable:has(.cap-link:focus-visible) {
  outline: 2px solid var(--signal-deep);
  outline-offset: 3px;
  border-color: var(--signal-deep);
}
.cap-card--clickable .cap-link:focus-visible { outline: none; }
.cap-card--clickable:hover h3 { color: var(--signal-deep); }

/* ---------- ABOVE / BELOW / BEYOND triptych ---------- */

.triptych {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.trip-panel {
  background: var(--deep);
  padding: 2.4rem 2rem 2.2rem;
  position: relative;
  overflow: hidden;
  min-height: 380px;
  display: flex; flex-direction: column;
}
.trip-panel .el {
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .24em;
  color: var(--signal); margin-bottom: 2rem;
}
.trip-panel h3 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem); font-weight: 750;
  letter-spacing: .01em; color: var(--white);
}
.trip-panel .sub { font-size: .95rem; color: #bfd0d8; margin: 0 0 1.4rem; }
.trip-panel ul { list-style: none; margin: auto 0 0; padding: 1.2rem 0 0; border-top: 1px solid var(--line-dark); display: grid; gap: .35rem; }
.trip-panel ul li { font-size: .9rem; color: var(--mist); padding-left: 1.1rem; position: relative; }
.trip-panel ul li::before {
  content: ""; position: absolute; left: 0; top: .58em;
  width: 5px; height: 5px; background: var(--signal); transform: rotate(45deg);
}
.trip-panel--above { background: linear-gradient(180deg, #1a4256 0%, var(--deep) 70%); }
.trip-panel--below { background: linear-gradient(180deg, var(--deep) 0%, #0a2130 80%); }
.trip-panel--beyond { background: linear-gradient(150deg, var(--deep-2) 0%, var(--deep) 70%); }

/* ---------- Stats / proof strip ---------- */

.proof {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px; background: var(--line-light); border: 1px solid var(--line-light);
}
.proof > div { background: var(--white); padding: 1.6rem 1.4rem; }
.proof b {
  font-family: var(--font-display); font-weight: 750;
  font-size: clamp(1.6rem, 3vw, 2.3rem); color: var(--ink); display: block;
  letter-spacing: -.02em;
}
.proof span { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--steel); }

/* ---------- Projects ---------- */

.filter-bar { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 2rem; }
.filter-btn {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .16em; text-transform: uppercase;
  background: none; border: 1px solid var(--line-light); color: var(--steel);
  padding: .5rem .95rem; cursor: pointer; transition: all .15s ease;
}
.filter-btn:hover { border-color: var(--signal-deep); color: var(--signal-deep); }
.filter-btn[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--white); }

.project-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.2rem;
}
.project-card {
  background: var(--white); border: 1px solid var(--line-light);
  color: inherit; text-decoration: none; display: flex; flex-direction: column; position: relative;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.project-card:hover { border-color: var(--signal-deep); transform: translateY(-3px); box-shadow: var(--shadow); }
.project-card figure { margin: 0; overflow: hidden; background: var(--deep); }
.project-card .card-figure img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .4s ease; }
.project-card:hover .card-figure img { transform: scale(1.04); }
.project-card .meta { padding: 1.3rem 1.4rem 1.5rem; }

/* The title anchor covers the card, so the whole card is one link and there
   is no nesting. The carousel sits above it and keeps its own controls. */
.project-card h3 { margin: 0 0 .9rem; font-size: 1.08rem; }
.project-card h3 a { text-decoration: none; color: var(--ink); }
.project-card h3 a::before { content: ""; position: absolute; inset: 0; z-index: 1; }
.project-card:hover h3 a { color: var(--signal-deep); }
.project-card .carousel { position: relative; z-index: 2; }
.project-card:has(h3 a:focus-visible) { outline: 2px solid var(--signal-deep); outline-offset: 3px; }
.project-card h3 a:focus-visible { outline: none; }
.project-card .tag {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .2em;
  text-transform: uppercase; color: var(--signal-deep); display: block; margin-bottom: .7rem;
}
.project-card.hidden { display: none; }

/* ---------- Intelligence dark section ---------- */

.intel-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.intel-visual { position: relative; }
.intel-visual svg { width: 100%; height: auto; display: block; }
.intel-cats { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; margin-top: 1.6rem; list-style: none; padding: 0; }
.intel-cats li {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .2em; text-transform: uppercase;
  color: #cfe6ea; border: 1px solid var(--line-dark); padding: .6rem .8rem;
  display: flex; align-items: center; gap: .6rem;
}
.intel-cats li::before { content: ""; width: 6px; height: 6px; background: var(--signal); }

/* ---------- Knowledge ---------- */

.doc-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line-light); }
.doc-list li { border-bottom: 1px solid var(--line-light); }
.doc-list a {
  display: grid; grid-template-columns: 3.4rem 1fr auto; align-items: center; gap: 1rem;
  padding: .95rem .4rem; text-decoration: none; color: var(--ink);
  transition: background .15s ease;
}
.doc-list a:hover { background: var(--white); }
.doc-list .doc-num { font-family: var(--font-mono); font-size: .72rem; color: var(--steel); letter-spacing: .1em; }
.doc-list .doc-title { font-weight: 500; font-size: .98rem; }
.doc-list .doc-type {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .18em;
  color: var(--signal-deep); border: 1px solid currentColor; padding: .2rem .5rem;
}
.doc-list a:hover .doc-type { background: var(--signal-deep); color: var(--white); }

/* ---------- Products ---------- */

.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.2rem; }
.product-card {
  background: var(--white); border: 1px solid var(--line-light);
  padding: 1.8rem 1.6rem; display: flex; flex-direction: column; gap: .8rem;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.product-card:hover { border-color: var(--signal-deep); box-shadow: var(--shadow); }
.product-card .mat {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .2em;
  text-transform: uppercase; color: var(--signal-deep);
}
.product-card h3 { font-size: 1.15rem; margin: 0; }
.product-card dl { margin: 0; display: grid; gap: .55rem; font-size: .92rem; }
.product-card dt {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--steel);
}
.product-card dd { margin: .1rem 0 0; }

/* ---------- Two-column feature ---------- */

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.split figure { margin: 0; border: 1px solid var(--line-light); }
.split figure img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; }
.split figcaption {
  font-family: var(--font-mono); font-size: .65rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--steel); padding: .7rem .9rem; border-top: 1px solid var(--line-light); background: var(--white);
}

.checklist { list-style: none; padding: 0; margin: 1.2rem 0 0; display: grid; gap: .55rem; }
.checklist li { padding-left: 1.5rem; position: relative; }
.checklist li::before {
  content: "+"; position: absolute; left: 0; top: 0;
  font-family: var(--font-mono); color: var(--signal-deep); font-weight: 600;
}
.on-dark .checklist li::before { color: var(--signal); }

/* ---------- Quote ---------- */

.pull-quote {
  border-left: 2px solid var(--signal);
  padding: .4rem 0 .4rem 1.8rem;
  max-width: 720px;
}
.pull-quote p {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem); line-height: 1.4; color: var(--ink); margin: 0 0 .8rem;
}
.pull-quote cite { font-family: var(--font-mono); font-style: normal; font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--steel); }

/* ---------- Timeline (About) ---------- */

.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px;
  width: 1px; background: var(--line-dark);
}
.timeline li { padding: 0 0 1.8rem 2.2rem; position: relative; }
.timeline li::before {
  content: ""; position: absolute; left: 0; top: .45em;
  width: 15px; height: 15px; border: 1px solid var(--signal);
  background: var(--deep); transform: rotate(45deg);
}
.timeline b { color: var(--white); font-family: var(--font-display); font-size: 1.05rem; letter-spacing: .06em; text-transform: uppercase; display: block; margin-bottom: .2rem; }
.timeline p { margin: 0; font-size: .95rem; }

/* ---------- Forms ---------- */

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem 1.4rem; }
.form-grid .full { grid-column: 1 / -1; }
.field label {
  display: block; font-family: var(--font-mono); font-size: .66rem;
  letter-spacing: .2em; text-transform: uppercase; color: var(--steel);
  margin-bottom: .45rem;
}
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--font-body); font-size: 1rem; color: var(--ink);
  background: var(--white); border: 1px solid var(--line-light);
  padding: .8rem .9rem; transition: border-color .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--signal-deep); box-shadow: 0 0 0 3px rgba(13,141,150,.15);
}
.field textarea { min-height: 140px; resize: vertical; }
.form-note { font-size: .85rem; color: var(--steel); }

/* ---------- CTA band ---------- */

.cta-band {
  background: linear-gradient(120deg, var(--deep-2), var(--ink) 70%);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.cta-band .inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 2rem; padding: clamp(3rem, 7vw, 5rem) 0;
}

/* ---------- Footer ---------- */

.site-footer { background: var(--ink); color: var(--mist); padding: 3.5rem 0 2rem; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 2.5rem;
  padding-bottom: 2.5rem; border-bottom: 1px solid var(--line-dark);
}
.site-footer h4 {
  font-family: var(--font-mono); font-weight: 500; font-size: .66rem;
  letter-spacing: .24em; text-transform: uppercase; color: var(--signal); margin-bottom: 1rem;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.site-footer a { color: #cfdde3; text-decoration: none; font-size: .92rem; }
.site-footer a:hover { color: var(--signal); }
.footer-mission { font-family: var(--font-display); font-weight: 600; color: var(--white); font-size: 1.05rem; line-height: 1.45; max-width: 30ch; }
.footer-legal {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
  padding-top: 1.6rem; font-family: var(--font-mono); font-size: .66rem;
  letter-spacing: .14em; text-transform: uppercase; color: rgba(159,180,191,.6);
}

/* ---------- Reveal animation ---------- */

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .scanline { animation: none; display: none; }
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

/* ---------- Page hero (interior) ---------- */

.page-hero {
  background:
    linear-gradient(140deg, rgba(11,22,33,.6), rgba(11,22,33,.92) 70%),
    radial-gradient(110% 100% at 80% 0%, #1b4557 0%, #10293a 45%, #0b1621 100%);
  color: var(--white);
  position: relative; overflow: hidden;
}
.page-hero .hero-inner { padding: clamp(3.6rem, 9vh, 6rem) 0; }
.breadcrumbs {
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .2em;
  text-transform: uppercase; margin-bottom: 1.6rem;
}
.breadcrumbs a { color: var(--mist); text-decoration: none; }
.breadcrumbs a:hover { color: var(--signal); }
.breadcrumbs span { color: var(--signal); }

/* ---------- Responsive ---------- */

@media (max-width: 1080px) {
  .process { grid-template-columns: repeat(2, 1fr); }
  .process-step:last-child { grid-column: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .mega { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-list {
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--ink); border-bottom: 1px solid var(--line-dark);
    flex-direction: column; align-items: stretch; gap: 0;
    display: none; padding: .5rem 0 1rem;
  }
  .nav-list.open {
    display: flex;
    /* the menu can be taller than a phone screen: scroll it independently,
       capped at the space under the 72px header */
    max-height: calc(100vh - 73px);
    max-height: calc(100dvh - 73px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }
  .nav-list a, .nav-list button.nav-link {
    display: block; width: 100%; text-align: left;
    padding: .85rem var(--gutter); border-bottom: none;
  }
  .mega { position: static; transform: none; width: auto; box-shadow: none; border: none; border-left: 2px solid var(--signal); margin: 0 var(--gutter); padding: .6rem 1.2rem 1rem; grid-template-columns: 1fr; gap: 1rem; }
  .mega-products { border-top: none; padding-top: 0; }
  .mega-products ul { grid-template-columns: 1fr; }
  .mega ul a { padding: .45rem 0; }
  .nav-cta { margin: .8rem var(--gutter) 0; }
  .triptych { grid-template-columns: 1fr; }
  .intel-grid, .split { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; gap: .6rem; }
  .form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  section[id], article[id], div[id], h2[id], h3[id] { scroll-margin-top: 5.25rem; }
  .process { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
}

/* ---- brand logo (stacked Aqualift mark + wordmark) ---- */
.brand-logo{display:block;height:56px;width:auto;filter:drop-shadow(0 1px 4px rgba(0,0,0,.35))}
.brand-logo--footer{height:96px;margin-bottom:.35rem}
.brand:hover .brand-logo{filter:drop-shadow(0 1px 6px rgba(63,192,236,.4))}
.logo-inline{height:96px;width:auto;display:block;margin-bottom:1.4rem;filter:drop-shadow(0 1px 5px rgba(0,0,0,.3))}
@media (max-width:620px){.brand-logo{height:46px}}


/* ---- Aqualift heritage mark ---- */
.al-mark{display:block;width:auto}
.al-inline{height:64px;opacity:.95}
.al-footer{height:30px;opacity:.75}
.al-hero{position:absolute;right:4%;bottom:-40px;height:340px;opacity:.06;pointer-events:none}

/* Oversized logo watermark filling a dark hero block. Sits behind
   .hero-inner (z-index 2) and bleeds past the section edges. */
.hero-watermark{
  position:absolute;top:50%;right:-14%;transform:translateY(-50%);
  height:126%;width:auto;max-width:none;
  opacity:.055;pointer-events:none;user-select:none;z-index:0;
}
@media (max-width:900px){
  .hero-watermark{right:-18%;height:105%;opacity:.06}
}
@media (max-width:620px){
  .hero-watermark{right:-26%;height:80%;opacity:.05}
}
.heritage-line{display:flex;align-items:center;gap:.8rem;margin-top:2rem;padding-top:1.6rem;border-top:1px solid var(--line)}
.heritage-line img{height:34px}
.heritage-line p{margin:0;font-size:.9rem;color:var(--body)}
.on-dark .heritage-line{border-top-color:var(--line-dark)}
.on-dark .heritage-line p{color:var(--mist)}
.values-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:2.2rem}
.values-strip div{background:var(--paper);padding:1.2rem 1rem;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.18em;text-align:center;color:var(--deep)}
@media (max-width:900px){.values-strip{grid-template-columns:repeat(2,1fr)}.values-strip div:last-child{grid-column:1/-1}.al-hero{display:none}}

/* ---- contact page redesign ---- */
.contact-grid{display:grid;grid-template-columns:minmax(300px,420px) 1fr;gap:2.4rem;align-items:start}
.contact-card{background:var(--deep);border:1px solid var(--line-dark);padding:2.4rem 2.2rem;position:sticky;top:96px}
.contact-card .who{margin:1.6rem 0 .4rem;font-family:var(--font-display);font-weight:800;font-size:1.5rem;color:var(--white);letter-spacing:.01em}
.contact-card .role{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;color:var(--signal)}
.contact-card .intro{color:var(--mist);font-size:.95rem;margin:1.2rem 0 1.8rem;line-height:1.55}
.contact-actions{display:flex;flex-direction:column;gap:.8rem}
.contact-actions a{display:flex;align-items:center;gap:1rem;background:var(--deep-2);border:1px solid var(--line-dark);padding:1.05rem 1.2rem;text-decoration:none;transition:border-color .2s,background .2s}
.contact-actions a:hover,.contact-actions a:focus-visible{border-color:var(--signal);background:#16374b}
.contact-actions .ico{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.18em;color:var(--signal);min-width:52px}
.contact-actions .val{font-family:var(--font-display);font-weight:700;font-size:1.06rem;color:var(--white);word-break:break-all}
.contact-meta{margin-top:1.8rem;padding-top:1.4rem;border-top:1px solid var(--line-dark);font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--mist);display:flex;flex-direction:column;gap:.5rem}
.form-panel{background:var(--white);border:1px solid var(--line);padding:2.4rem 2.2rem}
.form-panel h2{font-size:1.35rem;margin-bottom:.4rem}
.form-panel .form-lede{color:var(--body);font-size:.95rem;margin-bottom:1.8rem}
.form-panel .field input,.form-panel .field select,.form-panel .field textarea{background:var(--paper)}
@media (max-width:980px){.contact-grid{grid-template-columns:1fr}.contact-card{position:static}}

/* ---- FAQ accordion ---- */
.faq{max-width:820px;margin:2.4rem auto 0;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;list-style:none;padding:1.5rem 3rem 1.5rem 0;position:relative;
  font-family:var(--font-display);font-weight:700;font-size:1.06rem;color:var(--deep);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:.4rem;top:50%;transform:translateY(-50%);
  font-family:var(--font-mono);font-size:1.3rem;font-weight:400;color:var(--signal-deep);transition:transform .2s
}
.faq details[open] summary::after{content:"−"}
.faq summary:hover{color:var(--signal-deep)}
.faq summary:focus-visible{outline:2px solid var(--signal-deep);outline-offset:3px}
.faq .answer{padding:0 3rem 1.7rem 0;color:var(--body);font-size:.96rem;line-height:1.65}
.faq .answer p{margin:0 0 .9rem}
.faq .answer p:last-child{margin:0}

/* ---- staff contact blocks ---- */
.staff-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.2rem;margin-top:2rem}
.staff-card{background:var(--white);border:1px solid var(--line-light);padding:1.8rem 1.6rem;display:flex;flex-direction:column;gap:.3rem}
.staff-card .who{font-family:var(--font-display);font-weight:700;font-size:1.2rem;color:var(--ink);margin:0}
.staff-card .role{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.22em;text-transform:uppercase;color:var(--signal-deep);margin:0 0 .7rem}
.staff-card a{font-weight:600;word-break:break-all}

/* ---- image preview trigger (product tiles) ---- */
.tile-preview{
  margin-top:.6rem;display:flex;align-items:center;gap:.9rem;width:100%;
  background:var(--paper);border:1px solid var(--line-light);padding:.55rem;
  cursor:zoom-in;text-align:left;font-family:var(--font-display);font-weight:600;
  font-size:.85rem;color:var(--ink);transition:border-color .18s ease,background .18s ease;
}
.tile-preview:hover,.tile-preview:focus-visible{border-color:var(--signal-deep);background:var(--white)}
.tile-preview img{width:74px;height:56px;object-fit:cover;flex:none}
.tile-preview .zoom{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;color:var(--signal-deep)}

/* ---- lightbox modal ---- */
.lightbox{position:fixed;inset:0;z-index:300;display:none}
.lightbox.open{display:block}
.lightbox-overlay{position:absolute;inset:0;background:rgba(8,17,27,.82);backdrop-filter:blur(3px);border:0;width:100%;height:100%;cursor:zoom-out}
.lightbox-panel{
  position:relative;z-index:1;max-width:min(1080px,94vw);margin:4.5vh auto 0;
  background:var(--deep);border:1px solid var(--line-dark);box-shadow:var(--shadow);
  padding:1rem;pointer-events:none;
}
.lightbox-panel > *{pointer-events:auto}
.lightbox-panel img{width:100%;max-height:78vh;object-fit:contain;background:var(--ink)}
.lightbox-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem .2rem .2rem}
.lightbox-caption{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mist);margin:0}
.lightbox-close{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;
  background:none;border:1px solid rgba(255,255,255,.5);color:var(--white);
  padding:.55rem 1rem;cursor:pointer;transition:background .15s ease,color .15s ease;
}
.lightbox-close:hover,.lightbox-close:focus-visible{background:var(--white);color:var(--ink)}
body.lightbox-open{overflow:hidden}
/* page stays put while the mobile menu is open; the menu scrolls instead */
body.nav-open{overflow:hidden}

/* ---- gallery carousel ----
   Native scroll-snap track: touch swipe and momentum come free from the
   browser; the buttons just scroll it. */
.carousel{position:relative}
.carousel-track{
  display:flex;gap:1rem;list-style:none;margin:0;padding:0;
  overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;
  scrollbar-width:none;-ms-overflow-style:none;
}
.carousel-track::-webkit-scrollbar{display:none}
.carousel-slide{flex:0 0 100%;scroll-snap-align:start;margin:0}
.carousel-slide figure{margin:0}
.carousel-slide img{
  width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;
  background:var(--deep);border:1px solid var(--line-light);
}
.on-dark .carousel-slide img{border-color:var(--line-dark)}

.carousel-btn{
  position:absolute;top:calc(50% - 1.6rem);transform:translateY(-50%);z-index:2;
  width:3.4rem;height:3.4rem;display:grid;place-items:center;cursor:pointer;
  background:rgba(11,24,38,.72);border:1px solid rgba(255,255,255,.45);color:var(--white);
  font-family:var(--font-mono);font-size:1.1rem;line-height:1;
  backdrop-filter:blur(4px);transition:background .18s ease,border-color .18s ease;
}
.carousel-btn:hover,.carousel-btn:focus-visible{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.carousel-btn[disabled]{opacity:.3;cursor:default}
.carousel-prev{left:.7rem}
.carousel-next{right:.7rem}

.carousel-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-top:.9rem}
.carousel-status{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--steel);margin:0;
}
.on-dark .carousel-status{color:var(--mist)}
.carousel-dots{display:flex;flex-wrap:wrap;gap:.4rem;list-style:none;margin:0;padding:0}
.carousel-dots button{
  width:9px;height:9px;padding:0;border:1px solid var(--steel);background:none;
  cursor:pointer;transition:background .15s ease,border-color .15s ease;
}
.carousel-dots button[aria-current="true"]{background:var(--signal-deep);border-color:var(--signal-deep)}
.on-dark .carousel-dots button{border-color:var(--mist)}
.on-dark .carousel-dots button[aria-current="true"]{background:var(--signal);border-color:var(--signal)}

@media (max-width:620px){
  /* 23 dots crowd a phone: swipe, arrows and the counter are enough */
  .carousel-dots{display:none}
  .carousel-bar{justify-content:flex-start}
}
@media (prefers-reduced-motion: reduce){
  .carousel-track{scroll-behavior:auto}
}

/* Transparent brand mark sitting directly on the section background:
   no panel, border, shadow or fill behind it. */
.system-mark{display:flex;align-items:center;justify-content:center;padding:1rem 0}
.system-mark img{width:100%;max-width:300px;height:auto;background:none;border:0;box-shadow:none}
@media (max-width:900px){
  .system-mark{padding:.5rem 0 0}
  .system-mark img{max-width:min(260px,70%)}
}

/* ---- card variant of the carousel ----
   Same component as the gallery: scroll-snap track, arrows, counter,
   swipe and keyboard. Only the framing changes for use inside a card. */
.carousel--card .carousel-track{gap:0}
.carousel--card .carousel-slide img{
  aspect-ratio:4/3;border:0;background:var(--deep);
}
.carousel--card .carousel-btn{
  width:2.2rem;height:2.2rem;font-size:.9rem;top:50%;
  background:rgba(11,24,38,.55);border-color:rgba(255,255,255,.4);
}
.carousel--card .carousel-prev{left:.5rem}
.carousel--card .carousel-next{right:.5rem}
.carousel--card:hover .carousel-btn{background:rgba(11,24,38,.8)}
.carousel--card .carousel-bar{
  position:absolute;right:.5rem;bottom:.5rem;margin:0;pointer-events:none;
}
.carousel--card .carousel-status{
  background:rgba(11,24,38,.62);color:#e7eef3;padding:.2rem .5rem;
  font-size:.6rem;letter-spacing:.14em;
}

@media (max-width:620px){
  /* comfortable tap targets on phones */
  .carousel--card .carousel-btn{width:2.75rem;height:2.75rem;font-size:1rem}
}

/* A single supplied image uses the same frame, without controls. */
.card-figure{margin:0;overflow:hidden;background:var(--deep)}
.card-figure img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;display:block}

/* Product images open the existing lightbox; the button is invisible until
   hover so the card stays quiet. */
.img-zoom{
  display:block;width:100%;padding:0;border:0;background:none;
  cursor:zoom-in;position:relative;line-height:0;
}
.img-zoom-hint{
  position:absolute;right:.5rem;bottom:.5rem;opacity:0;transition:opacity .18s ease;
  background:rgba(11,24,38,.72);color:#e7eef3;padding:.25rem .5rem;
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;line-height:1.4;
}
.img-zoom:hover .img-zoom-hint,.img-zoom:focus-visible .img-zoom-hint{opacity:1}

/* ---- shared spec list: Challenge/Method/Outcome and Problem/Solution ----
   One hierarchy for project cards and product cards. */
.spec{margin:0;display:grid;gap:.25rem;font-size:.93rem}
.spec dt{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--steel);margin-top:1rem;
}
.spec dt:first-of-type{margin-top:0}
.spec dd{margin:0;color:var(--body);line-height:1.6;max-width:62ch}

/* ---- archive cards (newsletters, brochures) ---- */
.arch-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));
  gap:1.6rem 1.2rem;margin-top:.5rem;
}
.arch-card{display:flex;flex-direction:column;gap:.9rem}
.arch-cover{
  display:block;border:1px solid var(--line-light);background:var(--white);
  overflow:hidden;transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.arch-cover img{width:100%;height:auto;display:block}
.arch-card:hover .arch-cover{border-color:var(--signal-deep);transform:translateY(-3px);box-shadow:var(--shadow)}
.arch-meta{display:flex;flex-direction:column;gap:.3rem}
.arch-kicker{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--signal-deep);
}
.arch-card h3{font-size:1rem;margin:0;line-height:1.3}
.arch-card h3 a{color:var(--ink);text-decoration:none}
.arch-card h3 a:hover{color:var(--signal-deep);text-decoration:underline}
.arch-card p{margin:.15rem 0 0;font-size:.88rem;color:var(--body)}
.arch-file{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--steel);margin-top:.3rem;
}


/* ---- system steps (Aqualift System delivery sequence) ---- */
.system-steps{list-style:none;margin:2.6rem 0 0;padding:0;counter-reset:step;display:grid;gap:0}
.system-steps li{
  display:grid;grid-template-columns:5.2rem 1fr;gap:1.2rem 2rem;align-items:start;
  padding:1.7rem .4rem;border-top:1px solid var(--line-light);
}
.system-steps li:last-child{border-bottom:1px solid var(--line-light)}
.system-steps .step-num{
  font-family:var(--font-mono);font-size:1.5rem;font-weight:500;color:var(--signal-deep);
  letter-spacing:.06em;line-height:1.2;
}
.system-steps h3{font-size:1.12rem;margin:0 0 .35rem;letter-spacing:.04em;text-transform:uppercase}
.system-steps p{margin:0;max-width:62ch;color:var(--body)}
@media (max-width:620px){
  .system-steps li{grid-template-columns:1fr;gap:.5rem;padding:1.5rem .2rem}
  .system-steps .step-num{font-size:1.1rem}
}