/* ==========================================================================
   Metro Pisos Elevados — Design System v2
   Grafite + ardósia + cobre. Grade técnica. Big Shoulders / IBM Plex.
   ========================================================================== */

:root{
  --ink:#14171A;
  --surface:#1D2226;
  --surface-2:#262C31;
  --slate:#5B6670;
  --slate-mist:#AAB3B9;
  --paper:#F5F6F4;
  --paper-2:#EBEDEA;
  --line:#DDE1DD;
  --line-dark:#333A40;
  --copper:#C9773F;
  --copper-deep:#A25E2C;
  --copper-glow:#E39A66;
  --ink-on-copper:#1B1109;
  --display:'Big Shoulders Display',sans-serif;
  --body:'IBM Plex Sans',sans-serif;
  --mono:'IBM Plex Mono',monospace;
  --max:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.65;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit}
:focus-visible{outline:2px solid var(--copper);outline-offset:3px}
::selection{background:var(--copper);color:var(--ink-on-copper)}
button{font:inherit;cursor:pointer}

.wrap{max-width:var(--max);margin:0 auto;padding:0 clamp(20px,5vw,48px)}

h1,h2,h3{
  font-family:var(--display);
  text-transform:uppercase;
  font-weight:900;
  letter-spacing:0.005em;
  line-height:0.94;
  text-wrap:balance;
}
h3{font-weight:800}

p{max-width:60ch}
.prose p + p{margin-top:1em}

.eyebrow{
  font-family:var(--mono);
  font-size:0.72rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  font-weight:500;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:currentColor;
  opacity:.5;
}

/* ---------- blueprint grid backdrop ---------- */
.grid-field{
  position:absolute;inset:0;
  background-image:
    linear-gradient(to right, var(--line-gridline,rgba(255,255,255,.05)) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-gridline,rgba(255,255,255,.05)) 1px, transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.on-light .grid-field{ --line-gridline: rgba(20,23,26,.06); }

/* ---------- nav ---------- */
header.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(20,23,26,.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-dark);
}
.nav-row{
  display:flex;align-items:center;justify-content:space-between;
  height:76px;color:var(--paper);gap:20px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--display);font-weight:900;
  font-size:1.4rem;letter-spacing:.02em;text-transform:uppercase;
  text-decoration:none;color:var(--paper);flex-shrink:0;
}
.brand-mark{height:34px;width:34px;object-fit:contain}
.brand em{font-style:normal;color:var(--copper)}
.brand small{
  font-family:var(--mono);font-size:.6rem;color:var(--slate-mist);
  letter-spacing:.1em;text-transform:uppercase;font-weight:400;
}
nav.links{display:flex;gap:2px;align-items:center}
nav.links a{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.04em;
  text-transform:uppercase;text-decoration:none;color:var(--slate-mist);
  padding:10px 16px;border-radius:2px;transition:color .15s ease, background .15s ease;
}
nav.links a:hover{color:var(--paper);background:var(--surface-2)}
nav.links a.active{color:var(--copper-glow)}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:.78rem;letter-spacing:.05em;text-transform:uppercase;
  text-decoration:none;font-weight:500;
  padding:13px 22px;border-radius:2px;border:1px solid transparent;
  transition:transform .15s ease, background .15s ease, border-color .15s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-copper{background:var(--copper);color:var(--ink-on-copper)}
.btn-copper:hover{background:var(--copper-glow)}
.btn-line{border-color:var(--line-dark);color:var(--paper)}
.btn-line:hover{border-color:var(--slate-mist)}
.btn-line-light{border-color:var(--line);color:var(--ink)}
.btn-line-light:hover{border-color:var(--slate)}
.btn-dark{background:var(--ink);color:var(--paper)}
.btn-dark:hover{background:var(--surface-2)}
.btn-block{width:100%;justify-content:center}

.menu-btn{
  display:none;background:none;border:none;color:var(--paper);
  width:40px;height:40px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.menu-btn span{width:22px;height:1px;background:currentColor;display:block}

.mobile-links{display:none}
.mobile-links.open{
  display:flex;flex-direction:column;background:var(--ink);
  border-top:1px solid var(--line-dark);padding:8px clamp(20px,5vw,48px) 20px;
}
.mobile-links a{
  font-family:var(--mono);font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;
  color:var(--slate-mist);text-decoration:none;padding:14px 0;border-bottom:1px solid var(--line-dark);
}
.mobile-links a:last-child{border-bottom:none}

/* ---------- hero (home) ---------- */
.hero{position:relative;background:var(--ink);color:var(--paper);overflow:hidden;padding:clamp(56px,9vw,110px) 0 clamp(60px,8vw,100px)}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(32px,5vw,64px);align-items:center}
.hero-copy .eyebrow{color:var(--copper-glow);margin-bottom:22px}
.hero h1{font-size:clamp(2.6rem,6.1vw,4.6rem);margin-bottom:22px}
.hero h1 i{font-style:normal;color:var(--copper)}
.hero .lede{font-size:clamp(1.02rem,1.6vw,1.2rem);color:var(--slate-mist);max-width:46ch;margin-bottom:34px}
.hero .cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:44px}
.stat-line{display:flex;gap:clamp(20px,4vw,44px);flex-wrap:wrap;border-top:1px solid var(--line-dark);padding-top:22px}
.stat-line div b{display:block;font-family:var(--display);font-weight:900;font-size:1.9rem;color:var(--paper);letter-spacing:.01em}
.stat-line div span{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate-mist)}

/* exploded cross-section diagram */
.diagram{position:relative;width:100%;aspect-ratio:1/1.05;display:flex;flex-direction:column;align-items:center;justify-content:center}
.diagram .layer{position:relative;width:min(340px,88%)}
.tile{
  height:34px;border-radius:2px;
  background:linear-gradient(115deg,#8C929A 0%,#B7BEC4 28%,#6E747B 55%,#9AA0A6 78%,#7D838A 100%);
  box-shadow:0 18px 30px -12px rgba(0,0,0,.55), inset 0 0 0 1px rgba(255,255,255,.08);
  animation:lift 4.5s ease-in-out infinite;
}
.tile::after{content:"";position:absolute;inset:0;border-radius:2px;background-image:repeating-linear-gradient(90deg, rgba(0,0,0,.14) 0 1px, transparent 1px 34px);opacity:.5}
.label-tag{
  position:absolute;left:calc(100% + 16px);top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--slate-mist);white-space:nowrap;display:flex;align-items:center;gap:8px;
}
/* there isn't reliably room beside the diagram for this label until the .wrap hits its max-width */
@media (max-width:1279px){
  .label-tag{display:none}
}
.label-tag::before{content:"";width:14px;height:1px;background:var(--copper)}
.void{width:min(340px,88%);height:78px;position:relative;display:flex;align-items:flex-end;justify-content:center;gap:10px;padding-bottom:4px}
.pedestal{width:10px;height:52px;background:linear-gradient(180deg,var(--copper),var(--copper-deep));border-radius:1px;opacity:.9}
.duct{font-family:var(--mono);font-size:.62rem;color:var(--slate-mist);letter-spacing:.06em;position:absolute;top:2px;left:0;text-transform:uppercase}
.slab{width:min(340px,88%);height:26px;border-radius:2px;background:repeating-linear-gradient(135deg,var(--surface-2) 0 6px, var(--surface) 6px 12px);box-shadow:inset 0 0 0 1px var(--line-dark)}
@keyframes lift{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
@media (prefers-reduced-motion:reduce){ .tile{animation:none} }

/* ---------- page header (inner pages) ---------- */
.page-head{position:relative;background:var(--ink);color:var(--paper);padding:clamp(52px,8vw,88px) 0 clamp(40px,6vw,60px)}
.page-head .wrap{position:relative;z-index:1}
.page-head .eyebrow{color:var(--copper-glow);margin-bottom:18px}
.page-head h1{font-size:clamp(2.2rem,5vw,3.6rem)}
.page-head .crumb{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--slate-mist);margin-top:16px;display:flex;gap:8px;align-items:center;
}
.page-head .crumb a{color:var(--slate-mist);text-decoration:none}
.page-head .crumb a:hover{color:var(--copper-glow)}

/* ---------- section shell ---------- */
section{position:relative;padding:clamp(56px,9vw,120px) 0}
.section-head{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(20px,5vw,64px);align-items:end;margin-bottom:clamp(36px,6vw,64px)}
.section-head h2{font-size:clamp(2rem,4.2vw,3.1rem)}
.section-head .eyebrow{color:var(--copper-deep);margin-bottom:16px}
.section-head p{color:var(--slate);max-width:46ch;font-size:1.02rem}
.on-light{background:var(--paper)}
.on-alt{background:var(--paper-2)}
.on-dark{background:var(--ink);color:var(--paper)}
.on-dark .section-head p{color:var(--slate-mist)}
.on-dark .section-head .eyebrow{color:var(--copper-glow)}

/* ---------- sistema (how it works) ---------- */
.system{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}
.system .step{border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:30px 26px 34px;position:relative}
.system .step .num{font-family:var(--mono);font-size:.72rem;color:var(--copper-deep);letter-spacing:.08em;margin-bottom:22px;display:block}
.system .step .mini{width:44px;height:16px;border-radius:2px;margin-bottom:22px}
.mini-placa{background:linear-gradient(115deg,#8C929A,#B7BEC4)}
.mini-pedestal{background:transparent;display:flex;align-items:flex-end;gap:5px;height:16px}
.mini-pedestal i{width:4px;height:100%;background:var(--copper);display:block;border-radius:1px}
.mini-vao{border:1px dashed var(--slate);background:transparent}
.mini-laje{background:repeating-linear-gradient(135deg,var(--surface-2) 0 4px, var(--paper-2) 4px 8px)}
.system .step h3{font-family:var(--mono);font-weight:600;text-transform:uppercase;letter-spacing:.04em;font-size:.92rem;margin-bottom:10px;color:var(--ink)}
.system .step p{color:var(--slate);font-size:.92rem}

/* ---------- products grid (home + service overview) ---------- */
.products{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line-dark);border:1px solid var(--line-dark)}
.product{background:var(--surface);color:var(--paper);padding:28px 24px 26px;display:flex;flex-direction:column;gap:16px;position:relative;overflow:hidden;text-decoration:none}
.product.tall{aspect-ratio:.92/1}
.swatch{width:100%;height:88px;border-radius:2px;position:relative;overflow:hidden;background:var(--surface-2)}
.swatch img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease}
.swatch::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,23,26,0) 50%,rgba(20,23,26,.4));pointer-events:none}
.product:hover .swatch img{transform:scale(1.06)}
.product .name{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:1.3rem;letter-spacing:.01em}
.product .spec{font-family:var(--mono);font-size:.72rem;color:var(--slate-mist);line-height:1.6;letter-spacing:.01em}
.product .more{margin-top:auto;font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--copper-glow);text-decoration:none;display:flex;align-items:center;gap:8px}
.product .more:hover{color:var(--paper)}
.product:hover{background:var(--surface-2)}

/* ---------- proof grid (real work photography) ---------- */
.proof-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.proof-item{position:relative;background:var(--paper-2);overflow:hidden;aspect-ratio:4/3;display:block}
.proof-item img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease}
.proof-item:hover img{transform:scale(1.05)}
.proof-item figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 16px;
  background:linear-gradient(180deg,rgba(20,23,26,0),rgba(20,23,26,.78));
  color:var(--paper);font-family:var(--mono);font-size:.7rem;letter-spacing:.04em;text-transform:uppercase;
}

/* ---------- trust / stat band ---------- */
.trust{background:var(--ink);color:var(--paper);position:relative}
.trust .wrap{position:relative;z-index:1}
.trust-grid{display:grid;grid-template-columns:minmax(0,1.1fr) repeat(3,minmax(0,1fr));gap:clamp(28px,4vw,40px)}
.trust-lede h2{font-size:clamp(1.9rem,3.6vw,2.6rem);margin-bottom:18px}
.trust-lede p{color:var(--slate-mist);max-width:40ch}
.trust-stat{border-left:1px solid var(--line-dark);padding-left:22px}
.trust-stat b{font-family:var(--display);font-weight:900;font-size:clamp(2.2rem,4vw,3.2rem);display:block;color:var(--copper-glow);letter-spacing:.01em}
.trust-stat span{font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--slate-mist)}

/* ---------- services strip ---------- */
.services{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.service{background:var(--paper);padding:clamp(28px,4vw,44px)}
.service .eyebrow{color:var(--copper-deep);margin-bottom:16px}
.service h3{font-size:clamp(1.4rem,2.6vw,1.9rem);margin-bottom:14px}
.service p{color:var(--slate);font-size:.96rem;max-width:44ch}

/* ---------- CTA band ---------- */
.cta-band{background:var(--copper);color:var(--ink-on-copper);padding:clamp(52px,7vw,84px) 0}
.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(1.9rem,4vw,2.9rem);color:var(--ink-on-copper)}
.cta-band .btn-line{border-color:rgba(27,17,9,.35);color:var(--ink-on-copper)}
.cta-band .btn-line:hover{border-color:var(--ink-on-copper)}

/* ---------- footer ---------- */
footer{background:var(--ink);color:var(--slate-mist);padding:56px 0 30px;border-top:1px solid var(--line-dark)}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.3fr) repeat(3,minmax(0,1fr));gap:32px;margin-bottom:44px}
.foot-grid h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--paper);margin-bottom:16px;font-weight:600}
.foot-grid p, .foot-grid a{font-size:.88rem;line-height:1.9;text-decoration:none;color:var(--slate-mist);display:block}
.foot-grid a:hover{color:var(--copper-glow)}
.foot-brand{font-family:var(--display);font-weight:900;text-transform:uppercase;font-size:1.3rem;color:var(--paper);margin-bottom:10px}
.foot-bottom{border-top:1px solid var(--line-dark);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-family:var(--mono);font-size:.7rem;letter-spacing:.04em;color:var(--slate)}

/* ---------- prose / content blocks (about, intros) ---------- */
.content-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(32px,6vw,72px);align-items:center}
.content-grid .media img{width:100%;height:auto;object-fit:contain}
.prose{color:var(--slate);font-size:1.02rem}
.prose strong{color:var(--ink)}

.spec-list{list-style:none;display:flex;flex-direction:column;gap:12px;margin-top:24px}
.spec-list li{display:flex;align-items:flex-start;gap:12px;font-family:var(--mono);font-size:.82rem;letter-spacing:.02em;text-transform:uppercase;color:var(--ink)}
.spec-list li::before{content:"";width:7px;height:7px;background:var(--copper);margin-top:6px;flex-shrink:0;border-radius:1px}

.check-list{list-style:none;display:flex;flex-direction:column;gap:16px;margin-top:20px}
.check-list li{display:flex;gap:14px;font-size:.98rem;color:var(--ink)}
.check-list li strong{font-family:var(--mono);text-transform:uppercase;font-size:.78rem;letter-spacing:.03em;display:block;color:var(--copper-deep);margin-bottom:4px}
.check-list li::before{content:"";width:6px;height:6px;background:var(--copper);margin-top:8px;flex-shrink:0;border-radius:50%}

/* ---------- product detail (gallery + specs) ---------- */
.detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(32px,6vw,72px);align-items:start}
.gallery{border:1px solid var(--line);border-radius:2px;overflow:hidden;background:var(--paper-2)}
.gallery .owl-carousel{margin-bottom:0}
.gallery img{width:100%;height:auto;object-fit:cover;aspect-ratio:4/3}
.gallery .owl-nav button{
  background:var(--ink) !important;color:var(--paper) !important;
  width:36px;height:36px;border-radius:2px !important;font-size:1.1rem !important;
}
.gallery .owl-dots{padding:12px 0;text-align:center}
.gallery .owl-dot span{background:var(--line-dark) !important}
.gallery .owl-dot.active span{background:var(--copper) !important}
.brand-strip{border-top:1px solid var(--line);margin-top:16px;padding-top:16px;display:flex;align-items:center;gap:12px}
.brand-strip img{height:36px;width:auto}
.brand-strip span{font-family:var(--mono);font-size:.72rem;color:var(--slate);letter-spacing:.04em;text-transform:uppercase}

/* ---------- forms ---------- */
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.field label{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate)}
.field input, .field select, .field textarea{
  font-family:var(--body);font-size:.98rem;color:var(--ink);
  background:var(--paper);border:1px solid var(--line);border-radius:2px;
  padding:13px 14px;width:100%;transition:border-color .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus{border-color:var(--copper);outline:none}
.field textarea{resize:vertical;min-height:120px}
.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 20px}
.form-check{display:flex;align-items:center;gap:10px;font-size:.85rem;color:var(--slate);margin-bottom:20px}
.form-check input{width:16px;height:16px;accent-color:var(--copper)}

.contact-card{display:flex;align-items:center;gap:16px;margin-bottom:20px}
.contact-card .ico{width:44px;height:44px;border-radius:2px;background:var(--copper);color:var(--ink-on-copper);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-weight:600;flex-shrink:0}
.contact-card h6{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--slate);margin-bottom:4px;font-weight:500}
.contact-card span, .contact-card a{font-size:.98rem;text-decoration:none;color:var(--ink)}

/* ---------- misc utility ---------- */
.center{text-align:center}
.mt-lg{margin-top:clamp(32px,5vw,56px)}
.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(20px,4vw,40px)}
.divider{height:1px;background:var(--line-dark);border:none;margin:0}
.back-to-top{
  position:fixed;right:22px;bottom:22px;z-index:60;
  width:46px;height:46px;border-radius:2px;background:var(--copper);color:var(--ink-on-copper);
  display:flex;align-items:center;justify-content:center;text-decoration:none;
  box-shadow:0 10px 24px -8px rgba(0,0,0,.45);
  opacity:0;pointer-events:none;transition:opacity .2s ease, transform .2s ease;
  font-size:1.1rem;
}
.back-to-top.show{opacity:1;pointer-events:auto}
.back-to-top:hover{transform:translateY(-3px)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .diagram{order:-1;max-width:340px;margin:0 auto 12px}
  .system{grid-template-columns:repeat(2,minmax(0,1fr))}
  .products{grid-template-columns:repeat(2,minmax(0,1fr))}
  .proof-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .proof-wide{grid-column:span 2}
  .trust-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .services{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .content-grid{grid-template-columns:1fr}
  .detail-grid{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  nav.links{display:none}
  .menu-btn{display:flex}
}
@media (max-width:560px){
  .brand small{display:none}
  .trust-grid{grid-template-columns:minmax(0,1fr)}
  .trust-stat{border-left:none;border-top:1px solid var(--line-dark);padding-left:0;padding-top:14px}
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .products{grid-template-columns:repeat(2,minmax(0,1fr))}
  .proof-grid{grid-template-columns:minmax(0,1fr)}
  .proof-wide{grid-column:span 1}
}