/* ============================================================
   Américo Oliveira & Lopes — Construções, Lda.
   Demo Munditopia · linguagem visual: desenho técnico de obra
   Paleta: tinta #14181F · obra #F2EFE8 · âmbar #E2680F · aço #7C8794
   Nenhuma imagem ou bloco se repete. Layout só deste site.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

:root{
  --ink:      #14181F;
  --ink-2:    #1C222C;
  --ink-3:    #262E3A;
  --paper:    #F2EFE8;
  --paper-2:  #E8E3D8;
  --steel:    #7C8794;
  --steel-2:  #A7B0BB;
  --amber:    #E2680F;
  --amber-2:  #FF7A1F;
  --line-d:   rgba(255,255,255,.14);
  --line-l:   rgba(20,24,31,.14);

  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --wrap: 1200px;
  --gut: clamp(20px, 4vw, 48px);
}

html{ scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body{
  margin:0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 17px; line-height: 1.6;
  overflow-x: hidden;
}
img{ max-width:100%; height:auto; display:block; }
a{ color: inherit; }
button{ font: inherit; }

.wrap{ width:100%; max-width: var(--wrap); margin:0 auto; padding: 0 var(--gut); }

/* ---------- tipografia ---------- */
h1,h2,h3,h4{ margin:0; font-weight: 800; letter-spacing: -.015em; line-height: 1.06; }
h1{ font-size: clamp(34px, 6.4vw, 68px); text-transform: uppercase; letter-spacing: -.03em; }
h2{ font-size: clamp(27px, 3.8vw, 44px); }
h3{ font-size: clamp(19px, 2vw, 23px); letter-spacing: -.01em; }
p{ margin: 0 0 1em; }
.lead{ font-size: clamp(17px, 1.5vw, 20px); color: #3A424E; max-width: 62ch; }
.mono{ font-family: var(--mono); }

/* palavra realçada dentro de títulos — traço âmbar, não cor */
.hl{ position: relative; display:inline-block; }
.hl::after{
  content:""; position:absolute; left:-.06em; right:-.06em; bottom:.06em;
  height: .32em; background: var(--amber); opacity:.22; z-index:-1;
}

/* ---------- barra de protótipo ---------- */
.demobar{
  background: var(--ink); color: var(--steel-2);
  font-family: var(--mono); font-size: 11.5px; letter-spacing:.06em; text-transform: uppercase;
  padding: 8px var(--gut); text-align:center;
}
.demobar b{ color:#fff; font-weight:700; }
.demobar i{ color: var(--amber-2); font-style: normal; }

/* ---------- cabeçalho ---------- */
.hdr{
  position: sticky; top:0; z-index: 60;
  background: rgba(20,24,31,.94);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-d);
  color: var(--paper);
}
.hdr .bar{
  display:flex; align-items:center; gap: 18px;
  height: 74px;
}
.brand{ display:flex; align-items:center; gap:12px; text-decoration:none; margin-right:auto; }
.brand svg{ flex: 0 0 auto; }
.brand .nm{
  font-weight: 800; font-size: 15px; letter-spacing:.02em; line-height:1.1; text-transform: uppercase;
}
.brand .nm small{
  display:block; font-family: var(--mono); font-weight:400; font-size: 10px;
  letter-spacing:.22em; color: var(--steel); text-transform: uppercase; margin-top:3px;
}
.nav{ display:flex; gap: 26px; align-items:center; }
.nav a{
  text-decoration:none; font-family: var(--mono); font-size:12.5px; text-transform: uppercase;
  letter-spacing:.1em; color:#D8DBD3; padding: 6px 0; border-bottom: 2px solid transparent;
}
.nav a:hover{ color:#fff; border-bottom-color: var(--amber); }
.lang{ display:flex; gap:6px; align-items:center; font-family: var(--mono); font-size:12px; }
.lang a{
  text-decoration:none; color: var(--steel-2); padding:4px 7px; border:1px solid var(--line-d);
}
.lang a[aria-current="true"]{ background: var(--amber); border-color: var(--amber); color:#fff; font-weight:700; }
.phonebtn{
  display:inline-flex; align-items:center; gap:9px; text-decoration:none;
  background: var(--amber); color:#fff; font-weight:700; font-size:13.5px;
  padding: 11px 16px; letter-spacing:.02em; border:1px solid var(--amber);
  text-transform: uppercase; font-family: var(--mono);
}
.phonebtn:hover{ background: var(--amber-2); border-color: var(--amber-2); }
.burger{
  display:none; background:none; border:1px solid var(--line-d); color:#fff;
  width:44px; height:40px; align-items:center; justify-content:center; cursor:pointer;
}
.burger span{ display:block; width:18px; height:2px; background:#fff; position:relative; }
.burger span::before, .burger span::after{
  content:""; position:absolute; left:0; width:18px; height:2px; background:#fff;
}
.burger span::before{ top:-6px; } .burger span::after{ top:6px; }

/* ---------- botões ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px; text-decoration:none; cursor:pointer;
  font-family: var(--mono); text-transform: uppercase; letter-spacing:.08em; font-size:13px;
  font-weight: 700; padding: 15px 22px; border: 1px solid var(--ink); background: none; color: var(--ink);
  transition: background .18s, color .18s, border-color .18s, transform .18s;
}
.btn:hover{ transform: translateY(-1px); }
.btn-amber{ background: var(--amber); border-color: var(--amber); color:#fff; }
.btn-amber:hover{ background: var(--amber-2); border-color: var(--amber-2); }
.btn-ink{ background: var(--ink); border-color: var(--ink); color:#fff; }
.btn-ink:hover{ background: var(--ink-3); }
.btn-ghost:hover{ background: var(--ink); color:#fff; }
.btn-ghost-light{ border-color: var(--line-d); color: var(--paper); }
.btn-ghost-light:hover{ background: var(--paper); color: var(--ink); border-color: var(--paper); }

/* ---------- secções ---------- */
section{ padding: clamp(56px, 8vw, 104px) 0; }
.sec-alt{ background: var(--paper-2); }
.sec-dark{ background: var(--ink); color: var(--paper); }
.sec-dark .lead{ color: var(--steel-2); }

.grid-bg{
  background-image:
    linear-gradient(to right, rgba(20,24,31,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20,24,31,.045) 1px, transparent 1px);
  background-size: 34px 34px;
}
.grid-bg-d{
  background-image:
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 34px 34px;
}

/* cabeçalho de secção com número mono + régua */
.sec-head{ display:flex; align-items:flex-start; gap: 18px; margin-bottom: 34px; }
.sec-no{
  flex:0 0 auto; font-family: var(--mono); font-size: 12px; font-weight: 700;
  border:1px solid var(--ink); padding: 4px 7px; margin-top: 6px;
}
.sec-dark .sec-no{ border-color: var(--amber); color: var(--amber-2); }
.sec-head .tt{ flex:1 1 auto; }
.sec-sub{ margin: 12px 0 0; color:#4A525E; max-width: 68ch; }
.sec-dark .sec-sub{ color: var(--steel-2); }
.eyebrow{
  font-family: var(--mono); font-size: 11.5px; letter-spacing:.2em; text-transform: uppercase;
  color: var(--amber); margin-bottom: 12px;
}
.sec-dark .eyebrow{ color: var(--amber-2); }

/* ---------- topo ---------- */
.hero{ position:relative; background: var(--ink); color: var(--paper); padding:0; }
.hero .in{
  display:grid; grid-template-columns: 1.05fr .95fr; align-items: stretch;
  max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gut);
}
.hero .txt{ padding: clamp(48px, 7vw, 88px) 0 clamp(48px, 7vw, 78px); position:relative; z-index:2; }
.hero h1{ color:#fff; }
.hero h1 em{ font-style: normal; color: var(--amber-2); }
.hero .lead{ color: var(--steel-2); margin-top: 22px; }
.hero .cta{ display:flex; flex-wrap:wrap; gap:12px; margin-top: 30px; }
.hero .facts{
  display:flex; flex-wrap:wrap; gap: 10px 26px; margin-top: 34px;
  font-family: var(--mono); font-size: 12px; letter-spacing:.08em; text-transform: uppercase;
  color: var(--steel);
}
.hero .facts b{ color: var(--paper); font-weight:700; }
.hero .fig{ position:relative; border-left:1px solid var(--line-d); min-height: 320px; }
.hero .fig img{ width:100%; height:100%; object-fit: cover; }
/* ---------- cartaz de obra (sobreposto no topo) ---------- */
.board{
  position:absolute; left:18px; bottom:18px; width:min(352px, 84%);
  background: rgba(242,239,232,.97); color: var(--ink);
  border:1px solid rgba(20,24,31,.25); box-shadow: 0 18px 40px rgba(0,0,0,.35);
}
.board .bh{
  background: var(--amber); color:#fff; font-family: var(--mono); font-size:10.5px;
  letter-spacing:.18em; text-transform: uppercase; padding: 8px 12px; font-weight:700;
}
.board .brow{ display:flex; gap:12px; padding: 11px 12px; border-bottom:1px solid var(--line-l); }
.board .brow b{
  font-family: var(--mono); font-size:11px; color: var(--amber); font-weight:700; padding-top:2px;
}
.board .brow span{ font-size: 13.5px; line-height:1.35; }
.board .brow i{
  display:block; font-style:normal; font-weight:800; font-size:14px; letter-spacing:-.01em;
  text-transform: none;
}
.board .bf{
  padding: 8px 12px; font-family: var(--mono); font-size:9.5px; letter-spacing:.1em;
  text-transform: uppercase; color:#6B7480;
}

/* ---------- serviços ---------- */
.svc-first{ border-top: 4px solid var(--amber); }
.svcs{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-l); border:1px solid var(--line-l); }
.svc{
  background: var(--paper); padding: 30px 26px 28px; position:relative;
  transition: background .2s;
}
.svc:hover{ background: #fff; }
.svc .no{
  font-family: var(--mono); font-size: 11px; letter-spacing:.14em; color:#6B7480;
  display:block; margin-bottom: 16px;
}
.svc h3{ margin-bottom: 10px; }
.svc p{ margin:0; color:#4A525E; font-size: 15.5px; }
.svc::after{
  content:""; position:absolute; left:0; top:0; bottom:0; width:3px; background: var(--amber);
  transform: scaleY(0); transform-origin: top; transition: transform .22s;
}
.svc:hover::after{ transform: scaleY(1); }
.svc .tagline{
  margin-top: 16px; font-family: var(--mono); font-size: 11px; letter-spacing:.1em;
  text-transform: uppercase; color: var(--amber);
}

/* ---------- obra (galeria + antes/depois) ---------- */
.gal{ display:grid; grid-template-columns: repeat(12, 1fr); gap: 12px; }
.gal figure{ margin:0; position:relative; overflow:hidden; cursor: zoom-in; background:#DDD8CC; }
.gal img{ width:100%; height:100%; object-fit:cover; transition: transform .5s ease; }
.gal figure:hover img{ transform: scale(1.04); }
.gal figcaption{
  position:absolute; left:0; right:0; bottom:0; padding: 26px 14px 12px;
  background: linear-gradient(to top, rgba(20,24,31,.82), transparent);
  color:#fff; font-family: var(--mono); font-size: 11px; letter-spacing:.12em; text-transform: uppercase;
}
.gal .a{ grid-column: span 6; aspect-ratio: 3/2; }
.gal .b{ grid-column: span 3; aspect-ratio: 4/3; }
.gal .c{ grid-column: span 4; aspect-ratio: 3/2; }

.ba{
  position:relative; border:1px solid rgba(255,255,255,.2); overflow:hidden;
  aspect-ratio: 3/2; --pos: 50%; cursor: ew-resize; touch-action: none; user-select:none;
}
.ba img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; pointer-events:none; }
.ba .top{ clip-path: inset(0 calc(100% - var(--pos)) 0 0); }
.ba .div{ position:absolute; top:0; bottom:0; left: var(--pos); width:2px; background: var(--amber); }
.ba .knb{
  position:absolute; top:50%; left: var(--pos); transform: translate(-50%,-50%);
  width:44px; height:44px; border-radius:50%; background: var(--amber); color:#fff;
  display:flex; align-items:center; justify-content:center; font-family: var(--mono); font-size:12px;
  border: 2px solid #fff; box-shadow: 0 6px 18px rgba(0,0,0,.35);
}
.ba .lbl{
  position:absolute; bottom:14px; font-family: var(--mono); font-size:11px; letter-spacing:.14em;
  text-transform: uppercase; background: rgba(20,24,31,.85); color:#fff; padding: 6px 10px;
}
.ba .lbl.l{ left:14px; } .ba .lbl.r{ right:14px; }

/* ---------- processo ---------- */
.steps{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 12px; }
.step{ position:relative; padding: 0 22px 0 0; }
.step .bar{ height: 3px; background: var(--line-d); position:relative; margin-bottom: 22px; }
.step .bar::before{
  content:""; position:absolute; top:-6px; left:0; width:15px; height:15px; background: var(--amber);
}
.step .no{ font-family: var(--mono); font-size: 11.5px; letter-spacing:.16em; color: var(--amber-2); }
.step h3{ color:#fff; margin: 10px 0 10px; }
.step p{ color: var(--steel-2); font-size: 15px; margin:0; }

/* ---------- empresa ---------- */
.about{ display:grid; grid-template-columns: 1.1fr .9fr; gap: clamp(24px, 5vw, 64px); align-items:center; }
.about .ph{ position:relative; }
.about .ph img{ width:100%; height:auto; display:block; }
.about .ph .cap{
  position:absolute; left:0; bottom:0; background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 10.5px; letter-spacing:.1em; text-transform: uppercase;
  padding: 8px 12px;
}
.factlist{ list-style:none; margin: 26px 0 0; padding:0; border-top:1px solid var(--line-l); }
.factlist li{
  display:flex; gap: 16px; padding: 13px 0; border-bottom:1px solid var(--line-l);
  font-size: 15.5px;
}
.factlist .k{
  flex: 0 0 168px; font-family: var(--mono); font-size: 11.5px; letter-spacing:.1em;
  text-transform: uppercase; color:#6B7480; padding-top: 3px;
}
.factlist .v{ color: var(--ink); }
.factlist .v small{ display:block; color:#6B7480; font-size:12.5px; }

/* ---------- contactos ---------- */
.contact{ display:grid; grid-template-columns: .95fr 1.05fr; gap: clamp(24px, 4vw, 56px); align-items:start; }
.cbox{ border:1px solid var(--line-l); background: #fff; }
.cbox .r{ padding: 20px 22px; border-bottom:1px solid var(--line-l); display:flex; gap:14px; align-items:flex-start; }
.cbox .r:last-child{ border-bottom:0; }
.cbox .k{
  flex:0 0 120px; font-family: var(--mono); font-size:11px; letter-spacing:.12em; text-transform: uppercase;
  color:#6B7480; padding-top:4px;
}
.cbox .v{ font-size: 16px; }
.cbox .v a{ text-decoration:none; border-bottom:1px solid rgba(226,104,15,.5); }
.cbox .v a:hover{ color: var(--amber); }
.cbox .v small{ display:block; color:#6B7480; font-size:12.5px; margin-top:4px; }

form{ background: var(--ink); color: var(--paper); padding: clamp(24px, 3vw, 34px); border:1px solid var(--ink); }
form h3{ color:#fff; margin-bottom: 8px; }
form .fh{ color: var(--steel-2); font-size: 14.5px; margin-bottom: 22px; }
.f2{ display:grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.fld{ margin-bottom: 14px; }
.fld label{
  display:block; font-family: var(--mono); font-size: 11px; letter-spacing:.14em; text-transform: uppercase;
  color: var(--steel-2); margin-bottom: 7px;
}
.fld input, .fld select, .fld textarea{
  width:100%; padding: 13px 14px; border:1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.05);
  color:#fff; font-family: var(--sans); font-size: 15.5px; border-radius:0;
}
.fld select{ appearance:none; background-image: linear-gradient(45deg, transparent 50%, #fff 50%), linear-gradient(135deg, #fff 50%, transparent 50%); background-position: calc(100% - 20px) 21px, calc(100% - 14px) 21px; background-size: 6px 6px, 6px 6px; background-repeat: no-repeat; }
.fld textarea{ min-height: 118px; resize: vertical; }
.fld input:focus, .fld select:focus, .fld textarea:focus{ outline: 2px solid var(--amber); outline-offset: 1px; }
form .note{ font-size: 12.5px; color: var(--steel); margin: 14px 0 0; }
.msg{ margin-top: 14px; padding: 13px 15px; font-family: var(--mono); font-size: 12.5px; display:none; }
.msg.ok{ display:block; background: rgba(226,104,15,.16); border:1px solid var(--amber); color:#FFD9BC; }
.msg.err{ display:block; background: rgba(255,255,255,.08); border:1px solid var(--line-d); color:#fff; }
.hp{ position:absolute; left:-9999px; }

.map{ margin-top: 40px; border:1px solid var(--line-l); background:#fff; }
.map .top{ display:flex; flex-wrap:wrap; gap: 12px; align-items:center; justify-content:space-between; padding: 15px 18px; border-bottom:1px solid var(--line-l); }
.map .top .m{ font-family: var(--mono); font-size:12px; letter-spacing:.12em; text-transform: uppercase; color:#5C6570; }
.map iframe{ width:100%; height: 340px; border:0; display:block; filter: grayscale(.25) contrast(1.02); }

/* ---------- rodapé ---------- */
footer{ background: var(--ink); color: var(--steel-2); padding: clamp(44px, 5vw, 64px) 0 26px; }
footer .cols{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 30px; }
footer h4{
  color:#fff; font-family: var(--mono); font-size:11px; letter-spacing:.18em; text-transform: uppercase;
  margin-bottom: 14px; font-weight:700;
}
footer a{ text-decoration:none; color: var(--steel-2); }
footer a:hover{ color:#fff; }
footer ul{ list-style:none; margin:0; padding:0; }
footer li{ margin-bottom: 8px; font-size: 14.5px; }
footer .legal{
  margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line-d);
  display:flex; flex-wrap:wrap; gap: 12px 26px; justify-content:space-between;
  font-family: var(--mono); font-size: 11px; letter-spacing:.06em; text-transform: uppercase;
}
footer .by{ color: var(--steel); }
footer .by b{ color: var(--paper); }

/* ---------- lightbox ---------- */
.lb{
  position: fixed; inset:0; z-index: 200; background: rgba(12,15,20,.96);
  display:none; align-items:center; justify-content:center; flex-direction:column; padding: 20px;
}
.lb.on{ display:flex; }
.lb img{ max-width: min(1200px, 94vw); max-height: 78vh; object-fit: contain; }
.lb .cap{ color:#fff; font-family: var(--mono); font-size:12px; letter-spacing:.12em; text-transform: uppercase; margin-top: 16px; }
.lb .x, .lb .pv, .lb .nx{
  position:absolute; background:none; border:1px solid var(--line-d); color:#fff; cursor:pointer;
  width:46px; height:46px; display:flex; align-items:center; justify-content:center; font-size:18px;
}
.lb .x{ top: 22px; right: 22px; } .lb .pv{ left: 22px; top:50%; margin-top:-23px; }
.lb .nx{ right: 22px; top:50%; margin-top:-23px; }
.lb .x:hover, .lb .pv:hover, .lb .nx:hover{ background: var(--amber); border-color: var(--amber); }

/* ---------- revelação ---------- */
.rv{ opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.rv.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){ .rv{ opacity:1; transform:none; } }

/* ---------- móvel ---------- */
@media (max-width: 1080px){
  .nav{ display:none; }
  .burger{ display:flex; }
  .hero .in{ grid-template-columns: 1fr; }
  .hero .fig{ border-left:0; border-top:1px solid var(--line-d); min-height: 300px; aspect-ratio: 16/10; }
  .board{ left:10px; right:10px; bottom:10px; width:auto; }
  .board .brow{ padding: 9px 11px; }
  .board .brow i{ font-size:13px; }
  .svcs{ grid-template-columns: repeat(2, 1fr); }
  .steps{ grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .about{ grid-template-columns: 1fr; }
  .contact{ grid-template-columns: 1fr; }
  footer .cols{ grid-template-columns: 1fr 1fr; }
  .gal .a{ grid-column: span 12; }
  .gal .b{ grid-column: span 6; aspect-ratio: 3/2; }
  .gal .c{ grid-column: span 6; }
}
@media (max-width: 640px){
  body{ font-size: 16px; }
  .brand .nm{ font-size: 13px; }
  .brand .nm small{ letter-spacing:.14em; }
  .phonebtn{ display:none; }
  .svcs{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr; }
  .f2{ grid-template-columns: 1fr; }
  .gal .b, .gal .c{ grid-column: span 12; }
  .factlist li{ flex-direction: column; gap:4px; }
  .factlist .k{ flex:none; }
  .cbox .r{ flex-direction: column; gap:4px; }
  .cbox .k{ flex:none; }
  footer .cols{ grid-template-columns: 1fr; }
}

/* menu móvel */
.sheet{
  position: fixed; inset: 74px 0 0 0; z-index: 55; background: var(--ink); color:#fff;
  padding: 26px var(--gut); display:none; flex-direction: column; gap: 4px; overflow:auto;
}
.sheet.on{ display:flex; }
.sheet a{
  text-decoration:none; color:#fff; font-family: var(--mono); text-transform: uppercase;
  letter-spacing:.12em; font-size: 15px; padding: 16px 0; border-bottom:1px solid var(--line-d);
}
.sheet a.go{ color: var(--amber-2); }

/* ---------- acessibilidade e marcas de verificação ---------- */
.skip{
  position:absolute; left:-9999px; top:0; z-index:300;
  background:#fff; color:var(--ink); padding:12px 16px; font-family:var(--mono); font-size:13px;
}
.skip:focus{ left:12px; top:12px; }

/* «a confirmar»: valores vindos de registos públicos, a validar com o cliente */
.tbc{
  display:inline-block; font-family:var(--mono); font-size:9.5px; letter-spacing:.08em;
  text-transform:uppercase; color:var(--amber); border:1px dashed rgba(226,104,15,.65);
  padding:1px 5px; margin-left:7px; white-space:nowrap; vertical-align:1px;
}
.sec-dark .tbc{ color:var(--amber-2); border-color:rgba(255,122,31,.7); }
footer .tbc{ color:var(--amber-2); border-color:rgba(255,122,31,.7); }