/* ============================================================
   NASCO STEEL — single-page site
   Black / charcoal base · amber-gold accents · industrial-premium
   ============================================================ */

:root{
  --black:#0a0a0a;
  --ink:#0c0b0a;
  --char:#141311;
  --char-2:#1b1917;
  --char-3:#23201a;
  --gold:#c9a24b;
  --gold-2:#b88f3e;
  --gold-bright:#e6c478;
  --cream:#ece6da;
  --cream-dim:#b7b0a3;
  --muted:rgba(236,230,218,.56);
  --line:rgba(201,162,75,.22);
  --hairline:rgba(201,162,75,.30);

  --serif:"Playfair Display", Georgia, serif;
  --sans:"DM Sans", system-ui, sans-serif;
  --tech:"Space Grotesk", monospace;

  --container:1280px;
  --pad:clamp(20px,5vw,72px);
  --header-h:78px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--black);
  color:var(--cream);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.65;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
html{overflow-x:clip}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
section{position:relative}

::selection{background:var(--gold);color:#0a0a0a}

/* ---------- shared typography ---------- */
.eyebrow{
  font-family:var(--tech);
  text-transform:uppercase;
  letter-spacing:.32em;
  font-size:12.5px;
  font-weight:500;
  color:var(--cream-dim);
}
.gold-eyebrow{color:var(--gold)}
.display{
  font-family:var(--serif);
  font-weight:800;
  line-height:1.02;
  letter-spacing:-.01em;
  font-size:clamp(40px,6.6vw,86px);
  color:var(--cream);
}
.gold-text{color:var(--gold)}

.container{
  max-width:var(--container);
  margin:0 auto;
  padding-left:var(--pad);
  padding-right:var(--pad);
  width:100%;
}
.section{
  padding-top:clamp(84px,13vh,168px);
  padding-bottom:clamp(84px,13vh,168px);
  scroll-margin-top:90px;
}

/* gold hairline rule */
.rule{
  height:2px;width:96px;
  background:linear-gradient(90deg,var(--gold),var(--gold-2));
  border:0;border-radius:2px;
}
.divider{
  height:1px;width:100%;
  background:linear-gradient(90deg,transparent, var(--hairline) 18%, var(--hairline) 82%, transparent);
}

/* =========================================================
   HEADER
   ========================================================= */
#site-header{
  position:fixed;inset:0 0 auto 0;z-index:60;
  height:var(--header-h);
  display:flex;align-items:center;
  background:linear-gradient(180deg,rgba(8,8,8,.78),rgba(8,8,8,.18));
  transition:background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s;
  border-bottom:1px solid transparent;
}
#site-header.scrolled{
  background:rgba(9,9,9,.86);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.header-inner{
  width:100%;max-width:1440px;margin:0 auto;
  padding:0 var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:13px}
.brand-mark{height:30px;width:auto;filter:drop-shadow(0 1px 2px rgba(0,0,0,.5))}
.brand-word{
  font-family:var(--sans);font-weight:700;
  letter-spacing:.16em;font-size:16px;color:var(--cream);
  text-transform:uppercase;white-space:nowrap;
}
.nav{display:flex;align-items:center;gap:30px}
.nav a{
  font-size:14.5px;font-weight:500;letter-spacing:.02em;white-space:nowrap;
  color:var(--cream-dim);position:relative;padding:6px 0;
  transition:color .3s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1px;
  background:var(--gold);transition:right .35s var(--ease);
}
.nav a:hover{color:var(--cream)}
.nav a:hover::after{right:0}

/* Maison NS — plain nav link, no special treatment (moved into Services) */

.nav-toggle{
  display:none;background:none;border:0;cursor:pointer;
  width:40px;height:40px;flex-direction:column;justify-content:center;gap:6px;
}
.nav-toggle span{display:block;height:2px;width:24px;background:var(--cream);transition:.3s var(--ease)}
.nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* =========================================================
   HERO
   ========================================================= */
.hero{height:100vh;min-height:600px;overflow:hidden;background:#000}
.slides{position:absolute;inset:0}
.slide{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:0;transform:scale(1.06);
  transition:opacity 1.6s ease, transform 6s ease;
  will-change:opacity,transform;
}
.slide.active{opacity:1;transform:scale(1.13)}
.hero-vignette{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(120% 100% at 50% 38%, transparent 42%, rgba(0,0,0,.55) 100%),
    linear-gradient(180deg, rgba(0,0,0,.62) 0%, rgba(0,0,0,.05) 26%, rgba(0,0,0,.12) 64%, rgba(0,0,0,.78) 100%);
}
.hero-logo{
  position:absolute;top:calc(var(--header-h) + clamp(28px,6vh,72px));
  left:var(--pad);
  width:clamp(212px,26vw,372px);height:auto;z-index:4;
  filter:drop-shadow(0 4px 24px rgba(0,0,0,.7));
}
.hero-indicators{
  position:absolute;left:var(--pad);bottom:clamp(34px,6vh,58px);z-index:4;
  display:flex;gap:14px;align-items:center;
}
.hero-indicators button{
  --w:38px;width:var(--w);height:3px;border:0;padding:0;cursor:pointer;
  background:rgba(236,230,218,.28);border-radius:3px;overflow:hidden;position:relative;
  transition:background .3s;
}
.hero-indicators button::after{
  content:"";position:absolute;inset:0;width:0;background:var(--gold);
}
.hero-indicators button.active::after{
  width:100%;animation:fillbar 4.6s linear forwards;
}
@keyframes fillbar{from{width:0}to{width:100%}}
.hero-indicators button:hover{background:rgba(236,230,218,.5)}

.scroll-cue{
  position:absolute;right:var(--pad);bottom:clamp(34px,6vh,58px);z-index:4;
  font-family:var(--tech);font-size:11px;letter-spacing:.34em;text-transform:uppercase;
  color:var(--cream-dim);display:flex;align-items:center;gap:12px;writing-mode:vertical-rl;
}
.scroll-cue::after{
  content:"";width:1px;height:46px;background:linear-gradient(var(--gold),transparent);
  animation:cue 2.2s var(--ease) infinite;
}
@keyframes cue{0%{transform:scaleY(.3);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}50.1%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* =========================================================
   ABOUT
   ========================================================= */
.about{background:var(--char)}
.about-grid{
  display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(36px,6vw,90px);
  align-items:start;
}
.about-head .eyebrow{margin-bottom:26px}
.about-head .rule{margin-top:34px}
.about .lede{
  font-size:clamp(17px,1.5vw,20px);line-height:1.78;color:rgba(236,230,218,.84);
  max-width:60ch;
}
.about-meta{
  margin-top:42px;display:flex;gap:clamp(24px,4vw,52px);flex-wrap:wrap;
  padding-top:30px;border-top:1px solid var(--line);
}
.about-meta .num{font-family:var(--serif);font-weight:700;font-size:30px;color:var(--gold);line-height:1}
.about-meta .lbl{display:block;margin-top:9px;font-family:var(--tech);font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--cream-dim)}

.founders-row{
  margin-top:32px;display:flex;gap:clamp(24px,4vw,52px);flex-wrap:wrap;
}
.founder{display:flex;flex-direction:column;gap:4px}
.founder .f-name{font-family:var(--serif);font-weight:700;font-size:17px;color:var(--gold)}
.founder .f-role{font-family:var(--tech);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--cream-dim)}
body.hide-founders .founders-row{display:none}

/* =========================================================
   SERVICES
   ========================================================= */
.services{background:var(--ink)}
.catch{
  margin:22px 0 8px;
  font-size:clamp(34px,5.4vw,72px);
}
.catch em{font-style:italic;color:var(--gold)}
.part-label{
  margin-top:clamp(56px,7vw,92px);margin-bottom:30px;
  font-family:var(--tech);text-transform:uppercase;letter-spacing:.26em;
  font-size:13px;font-weight:600;color:var(--cream);
  display:flex;align-items:center;gap:18px;
}
.part-label::before{content:"";width:26px;height:2px;background:var(--gold);border-radius:2px}

.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.svc-card{
  background:var(--char-2);border:1px solid rgba(201,162,75,.10);
  padding:34px 30px 30px;border-radius:3px;
  transition:transform .45s var(--ease), border-color .45s, box-shadow .45s, background .45s;
}
.svc-card .svc-icon{width:42px;height:42px;color:var(--gold);margin-bottom:26px}
.svc-card h4{font-family:var(--serif);font-weight:700;font-size:22px;margin-bottom:8px;color:var(--cream)}
.svc-card p{font-size:15px;color:var(--muted);letter-spacing:.01em}
.svc-card:hover{
  transform:translateY(-5px);background:var(--char-3);
  border-color:rgba(201,162,75,.5);
  box-shadow:0 22px 50px -26px rgba(0,0,0,.9), 0 0 30px -10px rgba(201,162,75,.28);
}
.svc-note{
  margin-top:28px;font-style:italic;font-size:14.5px;color:var(--muted);
  max-width:62ch;padding-left:18px;border-left:2px solid var(--line);
}

.supply-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.supply-card{
  position:relative;overflow:hidden;
  background:
    linear-gradient(135deg,var(--char-2),var(--ink));
  border:1px solid rgba(201,162,75,.12);
  padding:42px 40px 46px;border-radius:3px;min-height:188px;
  display:flex;flex-direction:column;justify-content:flex-end;
  transition:transform .5s var(--ease), border-color .5s, box-shadow .5s;
}
.supply-card .supply-label{
  font-family:var(--tech);text-transform:uppercase;letter-spacing:.18em;
  font-size:13px;font-weight:600;color:var(--gold);margin-bottom:12px;
}
.supply-card p{font-family:var(--serif);font-size:clamp(20px,2vw,27px);line-height:1.25;color:var(--cream);max-width:22ch}
.supply-card .supply-index{
  position:absolute;top:26px;right:30px;font-family:var(--serif);
  font-size:46px;font-weight:700;color:rgba(201,162,75,.14);line-height:1;
  transition:color .5s;
}
.supply-card:hover{
  transform:translateY(-5px);border-color:rgba(201,162,75,.5);
  box-shadow:0 26px 60px -30px rgba(0,0,0,.95), 0 0 36px -14px rgba(201,162,75,.3);
}
.supply-card:hover .supply-index{color:rgba(201,162,75,.32)}

.cta-row{margin-top:clamp(44px,6vw,68px);display:flex;justify-content:center}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:12px;cursor:pointer;
  font-family:var(--tech);font-weight:600;font-size:14px;letter-spacing:.12em;
  text-transform:uppercase;padding:17px 38px;border-radius:2px;
  transition:transform .35s var(--ease), box-shadow .35s, background .35s, color .35s, border-color .35s;
  border:1px solid transparent;
}
.btn svg{width:16px;height:16px}
.btn-gold{background:var(--gold);color:#100d07;border-color:var(--gold)}
.btn-gold:hover{
  background:var(--gold-bright);transform:translateY(-3px);
  box-shadow:0 16px 40px -14px rgba(201,162,75,.7), 0 0 0 1px var(--gold-bright);
}
.btn-outline{background:transparent;color:var(--gold);border-color:var(--gold)}
.btn-outline:hover{
  background:rgba(201,162,75,.1);color:var(--gold-bright);
  transform:translateY(-3px);
  box-shadow:0 14px 36px -16px rgba(201,162,75,.6);
}

/* =========================================================
   PROJECTS
   ========================================================= */
.projects{background:var(--char)}
.proj-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:28px;flex-wrap:wrap;margin-bottom:48px;
}
.proj-head .display{margin-top:18px}
.tabs{display:flex;gap:8px;padding:5px;border:1px solid var(--line);border-radius:3px;background:rgba(0,0,0,.25)}
.tab{
  font-family:var(--tech);font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cream-dim);background:none;border:0;cursor:pointer;
  padding:12px 26px;border-radius:2px;transition:.35s var(--ease);
}
.tab.active{background:var(--gold);color:#100d07}
.tab:not(.active):hover{color:var(--cream)}

/* ---- project slideshow ---- */
.proj-stage{
  position:relative;width:100%;
  height:clamp(420px,64vh,680px);
  border:1px solid rgba(201,162,75,.16);border-radius:4px;overflow:hidden;
  background:#070706;
}
.pslides{position:absolute;inset:0}
.pslide{
  position:absolute;inset:0;margin:0;
  opacity:0;visibility:hidden;
  transition:opacity 1s var(--ease);
  display:none;
}
.pslide.show{display:block;visibility:visible}
.pslide.active{opacity:1}
.pslide-blur{
  position:absolute;inset:0;
  background:var(--bg) center/cover no-repeat;
  filter:blur(34px) brightness(.4) saturate(.85);
  transform:scale(1.18);
}
.pslide-blur::after{content:"";position:absolute;inset:0;background:rgba(7,6,5,.32)}
.pslide img{
  position:absolute;inset:0;margin:auto;
  max-width:100%;max-height:100%;width:auto;height:100%;
  object-fit:contain;
  filter:drop-shadow(0 24px 60px rgba(0,0,0,.6));
}
.pslide figcaption{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:64px clamp(22px,4vw,40px) 26px;
  background:linear-gradient(transparent, rgba(6,5,4,.86));
  display:flex;flex-direction:column;gap:5px;pointer-events:none;
}
.pslide .pcat{
  font-family:var(--tech);font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--gold);
}
.pslide .plabel{font-family:var(--serif);font-weight:700;font-size:clamp(20px,2.4vw,28px);color:var(--cream)}

.proj-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:54px;height:54px;border-radius:50%;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  background:rgba(10,9,8,.55);border:1px solid rgba(201,162,75,.3);
  color:var(--cream);backdrop-filter:blur(6px);
  transition:background .3s var(--ease),border-color .3s,color .3s,transform .3s;
}
.proj-arrow svg{width:22px;height:22px}
.proj-arrow.prev{left:clamp(14px,2vw,24px)}
.proj-arrow.next{right:clamp(14px,2vw,24px)}
.proj-arrow:hover{
  background:var(--gold);border-color:var(--gold);color:#100d07;
  transform:translateY(-50%) scale(1.06);
  box-shadow:0 0 28px -6px rgba(201,162,75,.6);
}
.proj-dots{
  position:absolute;z-index:5;left:0;right:0;bottom:clamp(14px,2.4vh,22px);
  display:flex;gap:9px;justify-content:center;align-items:center;
}
.proj-dots button{
  width:30px;height:3px;border:0;padding:0;cursor:pointer;border-radius:3px;
  background:rgba(236,230,218,.3);position:relative;overflow:hidden;transition:background .3s;
}
.proj-dots button::after{content:"";position:absolute;inset:0;width:0;background:var(--gold)}
.proj-dots button.active::after{width:100%;animation:fillbar 5s linear forwards}
.proj-dots button:hover{background:rgba(236,230,218,.55)}

/* =========================================================
   MAISON NS — subtle sub-part inside Services
   ========================================================= */
.maison-inline{
  max-width:70ch;
  padding:26px 0 4px;
  border-left:2px solid var(--line);padding-left:26px;
}
.maison-inline-sub{
  font-family:var(--serif);font-style:italic;font-weight:500;
  font-size:19px;color:var(--gold-bright);margin-bottom:14px;
}
.maison-inline-body{
  font-size:15px;line-height:1.75;color:var(--muted);max-width:62ch;margin-bottom:22px;
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact{background:var(--ink)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,7vw,96px);align-items:start}
.contact-left .display{margin:18px 0 18px}
.contact-sub{font-size:18px;color:rgba(236,230,218,.74);max-width:42ch}
.contact-info{margin-top:46px;display:flex;flex-direction:column;gap:30px}
.cinfo-item{display:flex;gap:18px;align-items:flex-start}
.cinfo-item .ico{width:22px;height:22px;color:var(--gold);flex:none;margin-top:3px}
.cinfo-item .k{font-family:var(--tech);font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--cream-dim);margin-bottom:5px}
.cinfo-item .v{font-size:16.5px;color:var(--cream);line-height:1.5}
.cinfo-item .v a{color:inherit;transition:color .25s var(--ease)}
.cinfo-item .v a:hover{color:var(--gold-bright)}

.cform{
  background:var(--char-2);border:1px solid var(--line);border-radius:4px;
  padding:clamp(28px,4vw,44px);
}
.field{margin-bottom:22px}
.field label{display:block;font-family:var(--tech);font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--cream-dim);margin-bottom:10px}
.field input,.field textarea{
  width:100%;background:#0c0b0a;border:1px solid rgba(236,230,218,.14);
  border-radius:2px;color:var(--cream);font-family:var(--sans);font-size:16px;
  padding:15px 16px;transition:border-color .3s,box-shadow .3s;resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:rgba(236,230,218,.34)}
.field input:focus,.field textarea:focus{
  outline:0;border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,162,75,.14);
}
.field.invalid input,.field.invalid textarea{border-color:#b4503a;box-shadow:0 0 0 3px rgba(180,80,58,.16)}
.form-status{min-height:22px;margin-top:6px;font-size:14px;color:var(--gold-bright);font-family:var(--tech);letter-spacing:.04em}
.form-status.err{color:#e08a6f}
.cform .btn{width:100%;justify-content:center;margin-top:8px}

/* =========================================================
   FOOTER
   ========================================================= */
.footer{
  background:#070706;padding:40px var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
}
.footer .f-left{font-family:var(--tech);font-size:13px;letter-spacing:.08em;color:var(--cream-dim)}
.footer .f-right{font-family:var(--serif);font-style:italic;font-size:15px;color:var(--muted)}
.footer .f-right b{color:var(--gold);font-weight:600;font-style:normal;letter-spacing:.04em;font-family:var(--tech);font-size:13px}

/* =========================================================
   REVEAL (motion-safe, JS-gated)
   ========================================================= */
@media (prefers-reduced-motion: no-preference){
  html.js [data-reveal]{
    opacity:0;transform:translateY(28px);
    transition:opacity .9s var(--ease), transform .9s var(--ease);
    transition-delay:var(--d,0ms);
  }
  html.js [data-reveal].in{opacity:1;transform:none}
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1000px){
  .svc-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:940px){
  body{font-size:16px}
  .nav-toggle{display:flex}
  .nav{
    position:fixed;inset:var(--header-h) 0 auto 0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(8,8,8,.97);backdrop-filter:blur(16px);
    padding:8px var(--pad) 22px;
    border-bottom:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:.4s var(--ease);
  }
  .nav.open{transform:none;opacity:1;pointer-events:auto}
  .nav a{width:100%;padding:16px 0;border-bottom:1px solid rgba(236,230,218,.07);font-size:16px}
  .nav a::after{display:none}
  .about-grid{grid-template-columns:1fr;gap:34px}
  .contact-grid{grid-template-columns:1fr;gap:40px}
}
@media (max-width:640px){
  :root{--header-h:66px}
  .svc-grid{grid-template-columns:1fr}
  .supply-grid{grid-template-columns:1fr}
  .brand-word{display:none}
  .brand-mark{height:32px}
  .proj-head{flex-direction:column;align-items:flex-start}
  .tabs{width:100%}
  .tab{flex:1;text-align:center;padding:13px 10px}
  .scroll-cue{display:none}
  .footer{flex-direction:column;align-items:flex-start;text-align:left}
  .btn{width:100%;justify-content:center}
}
@media (max-width:640px){
  .hero-logo{width:min(72vw,300px)}
}