:root{
  --bg:#f3e8d7;
  --paper:#f6efe4;
  --ink:#4a2e1c;
  --ink-60: rgba(74,46,28,.7);
  --accent:#6b3f27;
  --line:#e2d4c1;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: "Open Sans", system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, "Helvetica Neue", Arial, sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
}
h1,h2,h3,
.nav-toggle{
  display:none;
  border:none;
  background:transparent;
  cursor:pointer;
  margin-left:auto;
  padding:6px;
  border-radius:10px;
}
.nav-toggle span{
  display:block;
  width:22px;
  height:2px;
  border-radius:99px;
  background:var(--ink);
}
.nav-toggle span + span{margin-top:4px;}
.brand{
  font-family: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  letter-spacing:.2px;
}
a{color:var(--ink); text-decoration:none}

.sobre-layout{
  display:grid;
  gap:28px;
  grid-template-columns:1.1fr 1fr;
  align-items:stretch;
}
@media (max-width: 768px){
  .sobre-layout{
    grid-template-columns:1fr;
  }
}
.container{width:min(1100px, 92%); margin-inline:auto}
header{
  position:sticky; top:0; z-index:20;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(140%) blur(4px);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}
.brand{display:flex; gap:12px; align-items:center; font-size:1.6rem; font-weight:600}
.brand svg{width:34px; height:34px}
nav ul{display:flex; gap:18px; list-style:none; padding:0; margin:0; align-items:center}
nav a{padding:8px 12px; border-radius:10px; font-weight:600}
nav a.active, nav a:hover{background:#e9dfd1}
.hero{
  padding:48px 0 18px;
  background:linear-gradient(180deg, var(--paper), transparent);
}
.hero .grid{
  display:grid; gap:24px; grid-template-columns: 1.15fr .85fr;
}
.hero-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:18px; overflow:hidden;
  aspect-ratio: 16/10;
  display:flex; align-items:center; justify-content:center;
  color:var(--ink-60); font-weight:700;
}
.lead h1{font-size:3rem; line-height:1.1; margin:0 0 12px}
.lead p{font-size:1.125rem; color:var(--ink-60)}
.cta-row{display:flex; gap:12px; flex-wrap:wrap; margin-top:14px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 18px; border-radius:12px; border:1px solid var(--line);
  background:#e9dfd1; color:var(--ink); font-weight:700; cursor:pointer
}
.btn.primary{background:var(--accent); color:#fff; border-color:transparent}
.section{padding:54px 0}
.cards{display:grid; grid-template-columns:repeat(3,1fr); gap:20px}
.card{
  background:var(--paper); border:1px solid var(--line); border-radius:16px; padding:20px;
}
.card h3{margin:6px 0 8px; font-size:1.35rem}
.icon{width:30px; height:30px}
.footer{
  padding:36px 0; border-top:1px solid var(--line); background:var(--paper); margin-top:36px;
  color:var(--ink-60); font-size:.95rem;
}
.grid-portfolio{display:grid; grid-template-columns:repeat(3,1fr); gap:18px}
.thumb{
  background:var(--paper); border:1px solid var(--line); border-radius:14px; overflow:hidden;
  aspect-ratio: 4/3; display:flex; align-items:center; justify-content:center; color:var(--ink-60); font-weight:700
}
.filter-row{display:flex; gap:12px; margin:18px 0 22px}
.filter{padding:8px 14px; border-radius:10px; border:1px solid var(--line); background:var(--paper); font-weight:700}
.filter.active{background:#e9dfd1}
form label{display:block; font-weight:700; margin:12px 0 6px}
input, textarea{
  width:100%; padding:12px 14px; border-radius:12px; border:1px solid var(--line);
  background:#fffdfa; font-size:1rem; color:var(--ink)
}
textarea{min-height:160px; resize:vertical}
.form-card{background:var(--paper); border:1px solid var(--line); border-radius:18px; padding:20px}
.badge{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border:1px solid var(--line); border-radius:999px; background:#fff6eb; font-weight:700}
@media (max-width: 880px){
  .hero .grid{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .grid-portfolio{grid-template-columns:1fr 1fr}
}
@media (max-width: 520px){
  .grid-portfolio{grid-template-columns:1fr}
  .lead h1{font-size:2.2rem}
}


@media (max-width: 768px){
  header{
    position:sticky;
    top:0;
    z-index:40;
    background:var(--bg);
  }
  .nav{
    gap:12px;
  }
  nav{
    position:relative;
  }
  nav ul{
    position:absolute;
    top:100%;
    right:0;
    left:auto;
    margin-top:10px;
    background:var(--paper);
    border-radius:14px;
    border:1px solid var(--line);
    padding:10px 12px 12px;
    flex-direction:column;
    gap:4px;
    box-shadow:0 16px 40px rgba(0,0,0,0.12);
    max-height:0;
    opacity:0;
    overflow:hidden;
    pointer-events:none;
    transition:max-height .2s ease, opacity .2s ease;
  }
  body.nav-open nav ul{
    max-height:260px;
    opacity:1;
    pointer-events:auto;
  }
  nav a{
    display:block;
    width:100%;
  }
  .nav-toggle{
    display:inline-flex;
    flex-direction:column;
    justify-content:center;
  }
}



/* === Secção de simulação 3D === */
.sim-section{
  padding-top:48px;
}
.sim-header{
  max-width:640px;
  margin-bottom:26px;
}
.sim-header h1{
  font-size:2.4rem;
  line-height:1.1;
  margin:8px 0 10px;
}
.sim-header p{
  font-size:1.05rem;
  color:var(--ink-60);
  margin:0;
}
.sim-tabs{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}
.sim-tab{
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--paper);
  padding:8px 16px;
  font-weight:700;
  font-size:.95rem;
  cursor:pointer;
}
.sim-tab.active{
  background:var(--accent);
  color:#fff;
  border-color:transparent;
}
.sim-grid{
  margin-top:30px;
  display:grid;
  grid-template-columns:320px minmax(0,1fr);
  gap:20px;
  align-items:flex-start;
}
.config-panel{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:16px;
  padding:14px 14px 18px;
  max-height:540px;
  overflow-y:auto;
  font-size:.9rem;
}
.panel-title{
  font-size:.8rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.06em;
  color:var(--ink-60);
  margin-bottom:6px;
}
.field-group{
  background:#fffdfa;
  border-radius:12px;
  padding:10px 10px 8px;
  margin-bottom:10px;
  border:1px solid rgba(226,212,193,.7);
}
.field-group h3{
  margin:0 0 8px;
  font-size:.9rem;
}
.field{
  margin-bottom:8px;
  font-size:.8rem;
}
.field label{
  display:flex;
  justify-content:space-between;
  gap:8px;
  margin-bottom:4px;
}
.value-pill{
  background:#e9dfd1;
  border-radius:999px;
  padding:2px 8px;
  font-size:.7rem;
}
.sim-grid input[type="range"]{
  width:100%;
  appearance:none;
  height:4px;
  border-radius:999px;
  background:rgba(226,212,193,.9);
}
.sim-grid input[type="range"]::-webkit-slider-thumb{
  appearance:none;
  width:14px;
  height:14px;
  border-radius:999px;
  background:var(--accent);
  border:3px solid #f6efe4;
}
.sim-grid input[type="range"]::-moz-range-thumb{
  width:14px;
  height:14px;
  border-radius:999px;
  background:var(--accent);
  border:3px solid #f6efe4;
}
.sim-grid input[type="number"],
.sim-grid select{
  width:100%;
  border-radius:10px;
  border:1px solid var(--line);
  padding:6px 7px;
  font-size:.8rem;
  background:#fffdfa;
}
.checkbox-row{
  display:flex;
  align-items:center;
  gap:6px;
  margin-bottom:6px;
  font-size:.8rem;
}
.row-2{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8px;
}
.scene-box{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:16px;
  width:100%;
  aspect-ratio:2.1/1;
  min-height:320px;
  max-height:460px;
  position:relative;
  overflow:hidden;
}
.scene-box.loading::after{
  content:"A preparar cena 3D…";
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--ink-60);
  font-size:.9rem;
}
.scene-box canvas{
  width:100% !important;
  height:100% !important;
  display:block;
}
.webgl-error{
  padding:18px;
  text-align:center;
  color:#b91c1c;
  font-size:.85rem;
}
.right-stack{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:14px;
}
.quote-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:16px;
  padding:14px 16px 16px;
  max-width:360px;
  width:100%;
  box-shadow:0 10px 30px rgba(0,0,0,.05);
}
.quote-card form{
  display:grid;
  gap:10px;
}
.quote-card small{
  font-size:.75rem;
  color:var(--ink-60);
}
@media (max-width:1000px){
  .sim-grid{
    grid-template-columns:1fr;
  }
  .config-panel{
    order:2;
    max-height:none;
  }
  .right-stack{
    order:1;
    align-items:stretch;
  }
  .quote-card{
    max-width:none;
  }
}


/* Slider portefólio */
.slider{
  position:relative;
  max-width:960px;
  margin:24px auto 0;
  overflow:hidden;
  border-radius:16px;
  border:1px solid var(--line);
  background:var(--paper);
}
.slides{
  display:flex;
  transition:transform .5s ease;
}
.slide{
  min-width:100%;
}
.slide img{
  display:block;
  width:100%;
  height:auto;
}
.slide-btn{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  padding:8px 12px;
  border-radius:999px;
  border:none;
  background:rgba(0,0,0,.35);
  color:#fff;
  cursor:pointer;
}
.slide-btn.prev{left:14px;}
.slide-btn.next{right:14px;}
@media (max-width:720px){
  .slider{border-radius:12px;}
}


/* Responsive slider update */
.slider{
  max-width:600px;
}
@media (max-width:768px){
  .slider{
    max-width:90%;
  }
  .slide-btn{
    padding:4px 8px;
    font-size:18px;
  }
}