:root{
  --bg:#141414; --bg2:#1c1b19; --line:#33302a; --gold:#c8a45c; --gold-lt:#e0c88c;
  --text:#efe9dc; --muted:#a39d8d;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Archivo',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
section{padding:80px 0}
.eyebrow{font-size:.75rem;letter-spacing:.28em;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:12px}
h1,h2,h3{font-weight:800;line-height:1.15}
h2{font-size:clamp(1.8rem,4vw,2.6rem);color:var(--gold-lt);margin-bottom:16px}
.lead{color:var(--muted);max-width:640px;font-size:1.05rem}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(20,20,20,.95);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:12px}
.mark{width:42px;height:42px;border-radius:50%;border:2px solid var(--gold);display:grid;place-items:center;font-weight:800;color:var(--gold-lt);font-size:.9rem;box-shadow:inset 0 0 0 3px var(--bg),inset 0 0 0 4px var(--gold)}
.logo b{display:block;color:var(--gold-lt);letter-spacing:.12em;font-size:1.05rem;line-height:1}
.logo small{letter-spacing:.35em;font-size:.58rem;color:var(--muted)}
nav ul{display:flex;gap:28px;list-style:none;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase}
nav a:hover{color:var(--gold)}
.menu-btn{display:none;background:none;border:1px solid var(--gold);color:var(--gold);padding:6px 12px;font-size:1rem;cursor:pointer}

/* buttons */
.btn{display:inline-block;padding:13px 26px;font-weight:700;letter-spacing:.06em;font-size:.9rem;border:1px solid var(--gold);cursor:pointer;transition:.2s}
.btn.solid{background:var(--gold);color:#141414}
.btn.solid:hover{background:var(--gold-lt)}
.btn.ghost{color:var(--gold-lt)}
.btn.ghost:hover{background:rgba(200,164,92,.12)}

/* hero */
.hero{padding:110px 0 90px;background:radial-gradient(ellipse at 80% 0,#2a2418 0,transparent 60%),var(--bg);border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(2.3rem,6vw,4.2rem);color:var(--gold-lt);max-width:780px;margin-bottom:20px}
.hero p{max-width:600px;color:var(--muted);font-size:1.1rem;margin-bottom:32px}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}

/* stats */
.stats{background:var(--bg2);padding:36px 0;border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stats strong{display:block;font-size:2.2rem;color:var(--gold)}
.stats span{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}

/* about */
.two{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.two p{color:var(--muted);margin-bottom:14px}

/* cement */
.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.brands{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:36px}
.brand{border:2px solid var(--line);height:130px;padding:14px;display:grid;place-items:center;background:#fff;transition:.2s}
.brand:hover{border-color:var(--gold)}
.brand img{max-height:100%;max-width:100%;object-fit:contain}
.tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.tags span{border:1px solid var(--gold);color:var(--gold-lt);padding:6px 16px;font-size:.8rem;letter-spacing:.12em}

/* products */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px}
.card{background:var(--bg2);border:1px solid var(--line);overflow:hidden;transition:.25s}
.card:hover{border-color:var(--gold);transform:translateY(-4px)}
.card img{width:100%;height:190px;object-fit:cover;background:#222}
.card div{padding:18px 20px 22px}
.card small{display:block;font-size:.68rem;letter-spacing:.22em;color:var(--gold);margin-bottom:6px}
.card h3{font-size:1.15rem}

/* why */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.why div{border-left:2px solid var(--gold);padding:6px 0 6px 18px}
.why b{display:block;color:var(--gold-lt);margin-bottom:4px;font-size:1.05rem}
.why p{color:var(--muted);font-size:.95rem}

/* contact */
.contact-box{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.info p{margin-bottom:20px}
.info small{display:block;font-size:.7rem;letter-spacing:.25em;color:var(--gold);text-transform:uppercase}
.info a:hover{color:var(--gold)}
form{display:grid;gap:14px}
input,select,textarea{width:100%;padding:13px 14px;background:var(--bg);border:1px solid var(--line);color:var(--text);font:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--gold)}
textarea{min-height:110px;resize:vertical}
.note{font-size:.8rem;color:var(--muted)}

footer{padding:30px 0;text-align:center;border-top:1px solid var(--line);color:var(--muted);font-size:.8rem;letter-spacing:.1em}

.wa{position:fixed;right:18px;bottom:18px;background:#25d366;color:#fff;font-weight:700;padding:12px 18px;border-radius:40px;box-shadow:0 4px 14px rgba(0,0,0,.4);z-index:60;font-size:.9rem}

@media(max-width:820px){
  section{padding:56px 0}
  .menu-btn{display:block}
  nav ul{display:none;position:absolute;top:68px;left:0;right:0;background:var(--bg);flex-direction:column;gap:0;border-bottom:1px solid var(--line)}
  nav ul.open{display:flex}
  nav li a{display:block;padding:16px 20px;border-top:1px solid var(--line)}
  .two,.contact-box{grid-template-columns:1fr;gap:28px}
  .grid,.why{grid-template-columns:1fr}
}
@media(min-width:821px) and (max-width:1000px){
  .grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:820px){
  .brands{grid-template-columns:repeat(2,1fr)}
  .brand{height:110px}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .hero{padding:70px 0 60px}
}
.logo-img{height:48px;width:auto;border-radius:3px}
.td-logo{height:56px;width:auto;background:#fff;padding:6px 14px;margin:6px 0 16px;border-radius:3px}
.card img.fit{object-fit:contain;background:#0e0e0e}

/* product cards (clickable) */
.card{cursor:pointer}
.card img{height:230px;object-fit:contain;background:#101a33}
.card h3{font-size:1.05rem;margin-bottom:6px}
.card p{color:var(--muted);font-size:.88rem;margin-bottom:10px}
.card .more{color:var(--gold);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700}
.card:focus-visible{outline:2px solid var(--gold)}
/* lightbox */
.lb{position:fixed;inset:0;z-index:100;background:rgba(8,8,8,.94);display:flex;align-items:center;justify-content:center;flex-direction:column;padding:56px 56px 110px}
.lb[hidden]{display:none}
.lb figure{max-width:min(1000px,100%);max-height:100%;text-align:center}
.lb figure img{max-width:100%;max-height:calc(100vh - 230px);object-fit:contain;margin:0 auto;border:1px solid var(--line)}
.lb figcaption{margin-top:10px;color:var(--gold-lt);font-size:.9rem;letter-spacing:.06em}
.lb-x{position:absolute;top:12px;right:20px;background:none;border:0;color:var(--text);font-size:2.4rem;cursor:pointer}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);background:rgba(0,0,0,.5);border:1px solid var(--gold);color:var(--gold-lt);font-size:1.4rem;width:44px;height:60px;cursor:pointer}
.lb-prev{left:8px}.lb-next{right:8px}
.lb-th{position:absolute;bottom:16px;left:0;right:0;display:flex;gap:10px;justify-content:center;padding:0 12px}
.lb-th button{border:2px solid var(--line);background:#101a33;padding:0;cursor:pointer;opacity:.6}
.lb-th button.on{border-color:var(--gold);opacity:1}
.lb-th img{width:72px;height:54px;object-fit:cover;display:block}
@media(max-width:820px){.lb{padding:50px 8px 100px}.lb-nav{width:36px}.card img{height:200px}}

/* project supply */
.proj{margin-top:28px}
.proj h3{color:var(--gold-lt);font-size:1.1rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px}
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.proj-grid div{border:1px solid var(--gold);padding:20px;background:var(--bg)}
.proj-grid b{display:block;font-size:1.6rem;color:var(--gold-lt)}
.proj-grid span{color:var(--muted);font-size:.9rem}
@media(max-width:820px){.proj-grid{grid-template-columns:1fr}}

/* brand logos: original proportions, never stretched or boxed to one size */
.brands{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:18px}
.brand{height:auto;display:block;padding:12px 16px;width:auto}
.brand img{height:80px;width:auto;max-width:100%;object-fit:contain}
@media(max-width:820px){.brand img{height:64px}}

/* uniform logo tiles: identical size and shape, logos fitted inside without distortion */
.brands{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;justify-content:stretch}
.brand{width:auto;height:140px;padding:18px 22px;display:grid;place-items:center;background:#fff}
.brand img{height:auto;width:auto;max-width:100%;max-height:100%;object-fit:contain}
@media(max-width:1000px){.brands{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){.brands{grid-template-columns:repeat(2,1fr)}.brand{height:110px;padding:12px 14px}.brand img{height:auto}}