:root {
  --night: #0f1317;
  --surface: #161b20;
  --surface-2: #1c2228;
  --line: #2a3239;
  --text: #ebe8e2;
  --muted: #9099a1;
  --cyan: #7fb2d6;
  --primer: #c4532f;
  --primer-hi: #d96643;
  --serif: "Instrument Serif", "Times New Roman", serif;
  --sans: "Manrope", "Segoe UI", Arial, sans-serif;
  --wrap: 1240px;
}
*, *::before, *::after { box-sizing: border-box; }
html { background: var(--night); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--night); color: var(--text); font-family: var(--sans); font-size: 17px; line-height: 1.6; }
img { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--primer-hi); outline-offset: 3px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.skip { position: absolute; left: -999px; } .skip:focus { left: 12px; top: 12px; z-index: 99; background: #fff; color: #000; padding: 8px 12px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.02; margin: 0 0 .4em; letter-spacing: -0.01em; }
h1 { font-size: clamp(3rem, 7.4vw, 6.6rem); }
h2 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h3 { font-size: clamp(1.7rem, 2.6vw, 2.2rem); }
p { margin: 0 0 1em; max-width: 62ch; }
.lead { font-size: 1.16rem; color: #c9c7c1; }
.muted { color: var(--muted); }
.label { font-size: .82rem; color: var(--muted); letter-spacing: .02em; }

/* ---------- glass nav ---------- */
.nav {
  position: fixed; z-index: 30; top: 18px; left: 50%; transform: translateX(-50%);
  width: min(calc(100% - 32px), 1180px); display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px 10px 18px; border-radius: 14px;
  background: rgba(22, 27, 32, .55); border: 1px solid rgba(255, 255, 255, .09);
  -webkit-backdrop-filter: blur(16px) saturate(140%); backdrop-filter: blur(16px) saturate(140%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06);
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand svg { width: 30px; height: 30px; }
.brand b { font-weight: 700; letter-spacing: .08em; font-size: .92rem; }
.nav nav { display: flex; align-items: center; gap: 26px; font-size: .94rem; }
.nav nav a { text-decoration: none; color: #d7d4ce; }
.nav nav a:hover { color: #fff; }
.menu { display: none; background: none; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 7px 12px; font: inherit; }

.btn { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-weight: 600; font-size: .96rem;
  padding: 12px 20px; border-radius: 10px; background: var(--primer); color: #fff; border: 1px solid var(--primer); transition: background .2s; }
.btn:hover { background: var(--primer-hi); border-color: var(--primer-hi); }
.btn-ghost { background: transparent; border-color: rgba(255, 255, 255, .25); color: var(--text); }
.btn-ghost:hover { background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .4); }
.nav .btn { padding: 9px 16px; }

/* ---------- 3D story ---------- */
.story { position: relative; height: 560vh; }
.stage { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden; }
#frame3d { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.fallback { position: absolute; inset: 0; background: #0d1722 center / contain no-repeat; opacity: 0; transition: opacity .6s; }
.no-webgl .fallback { opacity: .35; }
.vignette { position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(120% 90% at 50% 40%, transparent 55%, rgba(8, 10, 12, .75) 100%),
              linear-gradient(to top, rgba(10, 12, 14, .85), transparent 38%); }

.chapter { position: absolute; left: max(28px, calc((100vw - var(--wrap)) / 2 + 28px)); bottom: 11vh; max-width: 560px;
  opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; pointer-events: none; }
.chapter.on { opacity: 1; transform: none; pointer-events: auto; }
.chapter .num { font-size: .84rem; color: var(--muted); margin-bottom: 12px; display: block; }
.chapter[data-chapter="1"] .num { color: var(--cyan); }
.chapter[data-chapter="3"] .num, .chapter[data-chapter="4"] .num { color: var(--primer-hi); }
.chapter p { color: #d2cfc8; font-size: 1.08rem; }
.chapter.intro { bottom: auto; top: 50%; transform: translateY(-40%); max-width: 760px; }
.chapter.intro.on { transform: translateY(-50%); }
.chapter .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.caption-glass { padding: 22px 24px; border-radius: 16px; background: rgba(15, 19, 23, .5); border: 1px solid rgba(255, 255, 255, .08);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }

.rail { position: absolute; right: 28px; top: 50%; transform: translateY(-50%);
  list-style: none; margin: 0; padding: 0 0 0 18px; font-size: .82rem; color: var(--muted); }
.rail::before { content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 1px; background: var(--line); }
.rail-fill { position: absolute; left: 0; top: 4px; bottom: 4px; width: 1px; background: var(--primer-hi); transform-origin: top; transform: scaleY(0); }
.rail li { padding: 9px 0; transition: color .3s; }
.rail li.on { color: var(--text); }
.scroll-hint { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); font-size: .8rem; color: var(--muted); transition: opacity .4s; }
.titleblock { opacity: 0; transform: translateY(14px); transition: opacity .7s, transform .7s; position: absolute; right: max(24px, calc((100vw - var(--wrap)) / 2 + 24px)); bottom: 11vh; width: 340px;
  border: 1px solid rgba(235, 232, 226, .5); font-size: .78rem; background: rgba(15, 19, 23, .55);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.titleblock.on { opacity: 1; transform: none; }
.titleblock div { display: grid; grid-template-columns: 1fr 1fr; }
.titleblock span { padding: 8px 10px; border-top: 1px solid rgba(235, 232, 226, .25); }
.titleblock span + span { border-left: 1px solid rgba(235, 232, 226, .25); }
.titleblock div:first-child span { border-top: 0; }
.titleblock em { display: block; font-style: normal; color: var(--muted); font-size: .7rem; }
.titleblock .ifc { color: var(--primer-hi); font-weight: 700; }

/* ---------- sections ---------- */
.section { padding: 130px 0; position: relative; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: end; margin-bottom: 64px; }
.section-head p { margin: 0; }
.spec { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.spec div { padding: 30px 24px; border-left: 1px solid var(--line); }
.spec div:first-child { border-left: 0; padding-left: 0; }
.spec strong { display: block; font-family: var(--serif); font-weight: 400; font-size: 2.4rem; line-height: 1.1; }
.spec span { color: var(--muted); font-size: .92rem; }

/* services with hover preview */
.svc-list { border-top: 1px solid var(--line); }
.svc { display: grid; grid-template-columns: 1.1fr 1fr 40px; gap: 30px; align-items: center; padding: 34px 0; border-bottom: 1px solid var(--line);
  text-decoration: none; position: relative; }
.svc h3 { margin: 0; transition: color .25s, transform .35s; }
.svc p { margin: 0; color: var(--muted); }
.svc .arrow { width: 22px; height: 22px; justify-self: end; opacity: .5; transition: transform .3s, opacity .3s; }
.svc:hover h3 { color: #fff; transform: translateX(10px); }
.svc:hover .arrow { opacity: 1; transform: rotate(-45deg); }
.svc .thumb { display: none; }
.peek { position: fixed; z-index: 25; width: 300px; aspect-ratio: 4/3; pointer-events: none; border-radius: 10px; overflow: hidden;
  background: #fff; opacity: 0; transform: translate(-50%, -50%) scale(.9); transition: opacity .25s, transform .25s; box-shadow: 0 30px 60px -20px rgba(0,0,0,.6); }
.peek.on { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.peek img { width: 100%; height: 100%; object-fit: cover; }

/* photo band */
.band { position: relative; min-height: 78vh; display: flex; align-items: flex-end; overflow: hidden;
  background: #1a1d20 url("https://images.unsplash.com/photo-1720278516199-55256b5040ef?w=2000&q=70&fm=webp&auto=format&fit=crop") center / cover; }
.band::before { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(12, 14, 16, .92) 10%, rgba(12, 14, 16, .25) 60%, rgba(12, 14, 16, .55)); }
.band .wrap { position: relative; padding-bottom: 90px; width: 100%; }
.band .credit { position: absolute; right: 28px; bottom: 18px; font-size: .72rem; color: rgba(255,255,255,.45); }

/* drawings gallery: horizontal strip */
.strip { display: grid; grid-auto-flow: column; grid-auto-columns: min(78vw, 520px); gap: 22px; overflow-x: auto; padding: 4px max(28px, calc((100vw - var(--wrap)) / 2 + 28px)) 26px;
  scroll-padding-left: max(28px, calc((100vw - var(--wrap)) / 2 + 28px));
  scroll-snap-type: x mandatory; scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
.strip figure { margin: 0; scroll-snap-align: start; }
.strip button { all: unset; cursor: zoom-in; display: block; width: 100%; box-sizing: border-box; border-radius: 12px; overflow: hidden;
  background: #f5f5f2; aspect-ratio: 4/3; }
.strip button:focus-visible { outline: 2px solid var(--primer-hi); outline-offset: 3px; }
.strip img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.strip button:hover img { transform: scale(1.04); }
.strip figcaption { padding: 14px 2px 0; font-size: .95rem; }
.strip figcaption span { display: block; color: var(--muted); font-size: .86rem; }

/* revision table */
.rev { width: 100%; border-collapse: collapse; font-size: 1rem; }
.rev th { text-align: left; font-weight: 500; color: var(--muted); font-size: .84rem; padding: 0 18px 14px 0; border-bottom: 1px solid var(--line); }
.rev td { padding: 26px 18px 26px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.rev td:first-child { font-family: var(--serif); font-size: 2.2rem; line-height: 1; width: 90px; color: var(--muted); }
.rev td:nth-child(2) { font-weight: 600; width: 30%; }
.rev td:last-child { color: #c9c7c1; }
.rev tr.ifc td:first-child, .rev tr.ifc td:nth-child(2) { color: var(--primer-hi); }

/* offer */
.offer { display: grid; grid-template-columns: 1fr auto; gap: 50px; align-items: center; padding: 60px; border-radius: 22px;
  background: radial-gradient(120% 140% at 100% 0%, rgba(196, 83, 47, .28), transparent 55%), var(--surface); border: 1px solid var(--line); }
.offer p { margin-bottom: 0; }
.stamp { width: 170px; height: 170px; border-radius: 50%; border: 2px solid var(--primer-hi); color: var(--primer-hi); display: flex; flex-direction: column;
  align-items: center; justify-content: center; transform: rotate(-10deg); text-align: center; }
.stamp b { font-family: var(--serif); font-weight: 400; font-size: 3.6rem; line-height: 1; }
.stamp span { font-size: .82rem; margin-top: 4px; }

/* contact + footer */
.contact { display: grid; grid-template-columns: 1.2fr 1fr; gap: 70px; }
.contact dl { margin: 0; border-top: 1px solid var(--line); }
.contact dl div { display: grid; grid-template-columns: 120px 1fr; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact dt { color: var(--muted); }
.contact dd { margin: 0; font-weight: 600; }
.contact dd a { text-decoration-color: rgba(255,255,255,.3); text-underline-offset: 4px; }
.checks { list-style: none; padding: 0; margin: 24px 0 0; }
.checks li { padding: 12px 0 12px 28px; border-bottom: 1px solid var(--line); position: relative; color: #d2cfc8; }
.checks li::before { content: ""; position: absolute; left: 2px; top: 20px; width: 11px; height: 6px; border-left: 2px solid var(--primer-hi); border-bottom: 2px solid var(--primer-hi); transform: rotate(-45deg); }
footer { border-top: 1px solid var(--line); padding: 50px 0 40px; color: var(--muted); font-size: .9rem; }
footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; }
footer h4 { color: var(--text); font-weight: 600; margin: 0 0 10px; font-size: .95rem; }
footer ul { list-style: none; margin: 0; padding: 0; } footer li { margin-bottom: 6px; }
footer a { text-decoration: none; } footer a:hover { color: var(--text); }
footer .legal { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid var(--line); margin-top: 10px; font-size: .8rem; max-width: none; }

/* viewer */
dialog.viewer { border: 0; padding: 0; background: #fff; max-width: min(1500px, 96vw); width: 96vw; border-radius: 12px; overflow: hidden; }
dialog.viewer::backdrop { background: rgba(6, 8, 10, .86); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
dialog.viewer img { width: 100%; max-height: 86vh; object-fit: contain; }
dialog.viewer .bar { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; background: var(--surface); color: var(--text); font-size: .92rem; }
dialog.viewer button { font: inherit; color: #fff; background: var(--primer); border: 0; border-radius: 8px; padding: 7px 14px; cursor: pointer; }

/* samples page */
.page-top { padding: 170px 0 70px; }
.grid-gal { display: grid; grid-template-columns: repeat(2, 1fr); gap: 34px 28px; }
.grid-gal figure { margin: 0; }
.grid-gal button { all: unset; cursor: zoom-in; display: block; width: 100%; box-sizing: border-box; aspect-ratio: 3/2; border-radius: 14px; overflow: hidden; background: #f5f5f2; }
.grid-gal img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.grid-gal button:hover img { transform: scale(1.04); }
.grid-gal figcaption { padding-top: 14px; }
.grid-gal figcaption b { font-family: var(--serif); font-weight: 400; font-size: 1.6rem; display: block; line-height: 1.1; margin-bottom: 4px; }
.grid-gal figcaption span { color: var(--muted); }

@media (max-width: 900px) {
  .section { padding: 90px 0; }
  .section-head, .contact, .offer { grid-template-columns: 1fr; gap: 26px; }
  .offer { padding: 36px 28px; }
  .spec { grid-template-columns: 1fr 1fr; }
  .spec div:nth-child(3) { border-left: 0; padding-left: 0; }
  .spec div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .svc { grid-template-columns: 1fr; gap: 10px; }
  .svc .arrow { display: none; }
  .svc .thumb { display: block; border-radius: 10px; overflow: hidden; background: #f5f5f2; aspect-ratio: 16/9; margin-top: 8px; }
  .svc .thumb img { width: 100%; height: 100%; object-fit: cover; }
  .peek { display: none; }
  .titleblock { display: none; }
  footer .wrap { grid-template-columns: 1fr; }
  .grid-gal { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .wrap { padding: 0 18px; }
  .nav nav { display: none; position: absolute; top: calc(100% + 8px); left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 14px;
    padding: 18px; border-radius: 14px; background: rgba(22, 27, 32, .96); border: 1px solid var(--line); }
  .nav nav.open { display: flex; }
  .menu { display: block; }
  .rail { display: none; }
  .chapter { left: 18px; right: 18px; bottom: 7vh; }
  .chapter.intro { top: auto; bottom: 12vh; transform: translateY(18px); }
  .chapter.intro.on { transform: none; }
  .story { height: 480vh; }
  .strip { padding: 4px 18px 22px; }
  .contact dl div { grid-template-columns: 90px 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
  .story { height: 100vh; }
}