/* SolidWurth Corp. — "Annotated As-Built" design system
   Ground: near-black steel. Ink: warm paper-white. One accent: SolidWurth crimson.
   Display: Barlow Condensed. Body: Barlow. Mono (data/measurement only): Share Tech Mono. */

:root {
  --ground: #0c0d10;
  --ground-2: #111318;
  --panel: #16181d;
  --hairline: rgba(237, 235, 230, 0.16);
  --hairline-strong: rgba(237, 235, 230, 0.32);
  --text: #edebe6;
  --text-2: #aaa69d;
  --crimson: #b01e24;
  --crimson-bright: #e0242e;
  --crimson-text: #ff5b63; /* small-text-safe crimson on dark */
  --glow: rgba(224, 36, 46, 0.45);
  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "Barlow", system-ui, sans-serif;
  --font-mono: "Share Tech Mono", ui-monospace, monospace;
  --pad: clamp(1.25rem, 4vw, 4rem);
  --measure: 68ch;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--ground);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

::selection { background: var(--crimson); color: #fff; }

/* ---------- Type ---------- */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  text-wrap: balance;
}

.display {
  font-size: clamp(3.2rem, 9vw, 6rem);
  font-weight: 800;
}

h2 { font-size: clamp(2.4rem, 5.5vw, 4rem); }
h3 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); line-height: 1.05; }

p { max-width: var(--measure); }
.muted { color: var(--text-2); }

/* Mono is for data: capacities, locations, scope items, coordinates. */
.data {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
}

/* Stamped tag — bordered data chip (capacity, location) */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  border: 1px solid var(--hairline-strong);
  padding: 0.4rem 0.7rem;
  white-space: nowrap;
}
.tag--crimson {
  color: #fff;
  border-color: var(--crimson-bright);
  background: color-mix(in srgb, var(--crimson) 24%, transparent);
}

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

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: #fff;
  background: var(--crimson);
  padding: 0.85rem 1.9rem;
  border: 1px solid var(--crimson-bright);
  transition: box-shadow 240ms cubic-bezier(0.16, 1, 0.3, 1), background 240ms;
}
.btn:hover, .btn:focus-visible {
  background: var(--crimson-bright);
  box-shadow: 0 6px 32px -6px var(--glow);
}
.btn--ghost {
  background: transparent;
  border: 1px solid var(--hairline-strong);
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  background: rgba(237, 235, 230, 0.08);
  border-color: var(--text);
  box-shadow: none;
}
:focus-visible { outline: 2px solid var(--crimson-bright); outline-offset: 3px; }

/* ---------- Nav ---------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem var(--pad);
  transition: background 300ms, border-color 300ms;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--hairline);
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.45rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  text-transform: uppercase;
}
.nav__brand-mark,
footer .mark {
  background: #fff; /* the mark is drawn for white ground; give it its own coin on the dark page */
  border-radius: 50%;
  padding: 3px;
  object-fit: contain;
}
.nav__brand-mark { width: 38px; height: 38px; }
footer .mark { width: 64px; height: 64px; }
.nav__brand b { color: var(--crimson-bright); font-weight: 800; }
.nav__brand span { color: var(--text-2); font-weight: 600; }
.nav__links {
  display: flex;
  gap: clamp(1rem, 3vw, 2.2rem);
  list-style: none;
}
.nav__links a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-2);
  transition: color 160ms;
}
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--text); }
.nav__links a[aria-current="page"] { border-bottom: 2px solid var(--crimson-bright); }
.nav__toggle { display: none; }

@media (max-width: 760px) {
  .nav__toggle {
    display: grid;
    place-items: center;
    background: none;
    border: 1px solid var(--hairline-strong);
    color: var(--text);
    width: 44px;
    height: 44px;
    cursor: pointer;
  }
  .nav__toggle svg { width: 22px; height: 22px; }
  .nav__links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    background: color-mix(in srgb, var(--ground) 96%, transparent);
    backdrop-filter: blur(14px);
    transform: translateY(-100%);
    transition: transform 360ms cubic-bezier(0.16, 1, 0.3, 1);
  }
  .nav__links.open { transform: translateY(0); }
  .nav__links a { font-size: 1.8rem; }
}

/* ---------- Hero (annotated as-built) ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
}
.hero__img {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* the dark grade: turns a noon aerial into night-shift steel */
  filter: saturate(0.55) contrast(1.08) brightness(0.52);
}
.hero__img::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70rem 24rem at 88% -4%, rgba(12, 13, 16, 0.95), transparent 68%),
    linear-gradient(180deg, rgba(12, 13, 16, 0.94) 0%, rgba(12, 13, 16, 0.3) 40%, rgba(12, 13, 16, 0.42) 68%, rgba(12, 13, 16, 0.96) 100%),
    linear-gradient(75deg, rgba(12, 13, 16, 0.8) 0%, rgba(12, 13, 16, 0.1) 55%);
}
.hero__annotation {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.hero__annotation svg {
  width: 100%;
  height: 100%;
}
.hero__annotation .flow {
  fill: none;
  stroke: var(--crimson-bright);
  stroke-width: 2.5;
  filter: drop-shadow(0 0 6px var(--glow));
}
.hero__annotation .node {
  fill: var(--ground);
  stroke: var(--crimson-bright);
  stroke-width: 2;
  filter: drop-shadow(0 0 8px var(--glow));
}
.hero__annotation .node-label {
  font-family: var(--font-mono);
  font-size: 15px;
  fill: #fff;
}
.hero__annotation .leader {
  fill: none;
  stroke: rgba(237, 235, 230, 0.7);
  stroke-width: 1;
}
.hero__annotation .callout {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.08em;
  fill: var(--text);
}
.hero__annotation .callout--sub { fill: var(--text-2); font-size: 12px; }

.hero__content {
  position: relative;
  padding: 6.5rem var(--pad) clamp(3rem, 7vh, 5.5rem);
  max-width: 1500px;
}
.hero__content h1 { max-width: 12ch; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1.4rem 0 1.8rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; }

/* drafting crosshair reticles bracketing the CTA cluster (comp signature) */
.reticle {
  position: absolute;
  width: 26px;
  height: 26px;
  color: var(--crimson-bright);
  opacity: 0.85;
  filter: drop-shadow(0 0 5px var(--glow));
  pointer-events: none;
}
.reticle svg { width: 100%; height: 100%; stroke: currentColor; stroke-width: 1.5; }

/* Compact zone legend replaces the drawn annotation where it can't fit */
.hero__legend { display: none; }

@media (max-width: 900px), (max-aspect-ratio: 6/5) {
  /* tight frames: the flow line and numbered nodes stay; text callouts hand
     their job to the legend below, whose numbers match the nodes */
  .hero__annotation .leader,
  .hero__annotation .callout,
  .reticle { display: none; }
  .hero__legend {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem 1.4rem;
    list-style: none;
    margin: 0 0 1.6rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-2);
  }
  .hero__legend span {
    color: var(--crimson-text);
    margin-right: 0.5rem;
  }
}
@media (max-width: 420px) {
  .hero__legend { grid-template-columns: 1fr; }
}

/* ---------- Sections & the spine ---------- */

.section {
  position: relative;
  padding: clamp(4rem, 10vh, 7.5rem) var(--pad);
  max-width: 1500px;
  margin-inline: auto;
}
.section--flush { padding-inline: 0; max-width: none; }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(2rem, 5vh, 3.5rem);
}
.section__head .data { margin-top: 0.8rem; }

/* vertical crimson spine that grows as you scroll */
.spine {
  position: absolute;
  left: calc(var(--pad) - 1px);
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--hairline);
}
.spine::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--crimson-bright), var(--crimson));
  transform-origin: top;
  transform: scaleY(var(--spine-progress, 0));
  box-shadow: 0 0 12px var(--glow);
}
.has-spine { padding-left: calc(var(--pad) + 2.5rem); }
@media (max-width: 760px) { .has-spine { padding-left: var(--pad); } .spine { display: none; } }

/* Station rows — the process, in order (sequence carries meaning) */
.station {
  position: relative;
  display: grid;
  grid-template-columns: 4.4rem 1fr;
  gap: 1.2rem;
  padding: 1.8rem 0;
  border-top: 1px solid var(--hairline);
}
.station:last-child { border-bottom: 1px solid var(--hairline); }
.station__num {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  color: var(--crimson-text);
  line-height: 1.1;
}
.station p { margin-top: 0.4rem; color: var(--text-2); }

/* ---------- Photo plate: hairline frame + registration ticks ---------- */

.plate {
  position: relative;
  border: 1px solid var(--hairline-strong);
  padding: 0.5rem;
}
.plate img, .plate video { width: 100%; height: 100%; object-fit: cover; display: block; }
.plate::before, .plate::after,
.plate .tick::before, .plate .tick::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--crimson-bright);
  border-style: solid;
}
.plate::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.plate::after { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.plate .tick::before { bottom: -1px; left: -1px; border-width: 0 0 2px 2px; }
.plate .tick::after { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.plate figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0.35rem 0.25rem;
}

/* ---------- Facility index rows (what we build) ---------- */

.index-row {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(1.2rem, 3vw, 3rem);
  align-items: center;
  padding: clamp(1.6rem, 4vh, 2.6rem) 0;
  border-top: 1px solid var(--hairline);
  text-decoration: none;
  transition: background 240ms;
}
.index-row:last-of-type { border-bottom: 1px solid var(--hairline); }
.index-row:hover { background: rgba(237, 235, 230, 0.03); }
.index-row h3 { transition: color 160ms; }
.index-row:hover h3 { color: var(--crimson-text); }
.index-row p { color: var(--text-2); margin-top: 0.5rem; }
.index-row .plate { max-width: 460px; justify-self: end; width: 100%; }
.index-row .plate img { aspect-ratio: 16 / 9; }
@media (max-width: 760px) {
  .index-row { grid-template-columns: 1fr; }
  .index-row .plate { justify-self: start; }
}

/* ---------- Project cards / galleries ---------- */

.grid {
  display: grid;
  gap: clamp(1rem, 2.5vw, 2rem);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) { .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid--2, .grid--3 { grid-template-columns: 1fr; } }

.scopelist {
  list-style: none;
  columns: 2;
  gap: 2rem;
  max-width: 56ch;
}
.scopelist li {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--hairline);
  break-inside: avoid;
}
.scopelist li::before { content: "— "; color: var(--crimson-text); }
@media (max-width: 620px) { .scopelist { columns: 1; } }

/* Featured case band */
.case {
  background: var(--ground-2);
  border-block: 1px solid var(--hairline);
}
.case__inner {
  max-width: 1500px;
  margin-inline: auto;
  padding: clamp(4rem, 10vh, 7rem) var(--pad);
}
.case__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}
@media (max-width: 900px) { .case__cols { grid-template-columns: 1fr; } }

/* ---------- As designed / As built comparison ---------- */

.compare {
  position: relative;
  border: 1px solid var(--hairline-strong);
  padding: 0.5rem;
  overflow: hidden;
  --pos: 50%;
}
.compare__frame { position: relative; }
.compare img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}
.compare img.compare__top {
  position: absolute;
  inset: 0;
  clip-path: inset(0 calc(100% - var(--pos)) 0 0);
}
.compare__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--pos);
  width: 2px;
  margin-left: -1px;
  background: var(--crimson-bright);
  box-shadow: 0 0 10px var(--glow);
  pointer-events: none;
}
.compare__divider::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--ground);
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" fill="none" stroke="%23edebe6" stroke-width="2"><path d="M18 15l-7 7 7 7M26 15l7 7-7 7"/></svg>');
  background-size: 100% 100%;
  border: 1px solid var(--crimson-bright);
  border-radius: 50%;
  width: 44px;
  height: 44px;
}
.compare input[type="range"] {
  position: absolute;
  inset: 0.5rem;
  width: calc(100% - 1rem);
  height: calc(100% - 1rem);
  opacity: 0;
  cursor: ew-resize;
  margin: 0;
}
.compare .tag { position: absolute; top: 1.1rem; z-index: 2; background: color-mix(in srgb, var(--ground) 80%, transparent); }
.compare .tag--left { left: 1.1rem; }
.compare .tag--right { right: 1.1rem; }

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

.cta {
  border-top: 1px solid var(--hairline);
  background:
    radial-gradient(90rem 30rem at 85% 120%, rgba(176, 30, 36, 0.28), transparent 60%),
    var(--ground);
}
.cta__inner {
  max-width: 1500px;
  margin-inline: auto;
  padding: clamp(4.5rem, 12vh, 8rem) var(--pad);
}
.cta a.tel {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  text-decoration: none;
  border-bottom: 3px solid var(--crimson-bright);
  line-height: 1.25;
}
.cta a.tel:hover { color: var(--crimson-text); }

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

footer {
  border-top: 1px solid var(--hairline);
  padding: clamp(2.5rem, 6vh, 4rem) var(--pad);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2.5rem;
  align-items: start;
  max-width: 1500px;
  margin-inline: auto;
}
footer .mark { width: 64px; }
footer nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 1.4rem; }
footer nav a {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-2);
}
footer nav a:hover { color: var(--text); }
footer .data { line-height: 2; }
@media (max-width: 760px) { footer { grid-template-columns: 1fr; gap: 1.6rem; } }

/* ---------- Reveal motion (one grammar: rise + unblur) ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  filter: blur(6px);
  transition:
    opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 700ms cubic-bezier(0.16, 1, 0.3, 1),
    filter 700ms cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.in { opacity: 1; transform: none; filter: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .hero__scrollcue::after { animation: none; }
  .hero__annotation .flow { stroke-dashoffset: 0 !important; }
}

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

.pagehero {
  position: relative;
  padding: clamp(9rem, 22vh, 13rem) var(--pad) clamp(2.5rem, 6vh, 4rem);
  max-width: 1500px;
  margin-inline: auto;
}
.pagehero .data { margin-top: 1.2rem; }