/* ============================================================
   SANDERPAS — Engenharia & Construções
   Sistema visual: teal petróleo + grafite + aço + papel
   ============================================================ */

:root{
  --teal-950:#0A2A2C;
  --teal-900:#0C2E30;
  --teal-800:#103D40;
  --teal-700:#15504F;
  --teal-600:#1C6062;
  --graphite:#1B2024;
  --graphite-2:#262D33;
  --steel:#7E8990;
  --steel-300:#AEB6BC;
  --steel-100:#D7DCDF;
  --paper:#F4F2EC;
  --paper-2:#ECE9E1;
  --white:#FFFFFF;
  --line:rgba(16,61,64,.14);
  --line-dark:rgba(255,255,255,.14);

  --ff-display:"Archivo",sans-serif;
  --ff-body:"Archivo",sans-serif;
  --ff-label:"Saira Semi Condensed",sans-serif;

  --maxw:1280px;
  --pad:clamp(20px,5vw,72px);
  --r:4px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--ff-body);
  color:var(--graphite);
  background:var(--paper);
  line-height:1.55;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* ---------- type helpers ---------- */
.eyebrow{
  font-family:var(--ff-label);
  text-transform:uppercase;
  letter-spacing:.28em;
  font-weight:600;
  font-size:.78rem;
  color:var(--teal-700);
  display:inline-flex;
  align-items:center;
  gap:.7em;
}
.eyebrow::before{
  content:"";
  width:30px;height:2px;background:var(--teal-700);display:inline-block;
}
.eyebrow.on-dark{color:var(--steel-100);text-shadow:0 1px 12px rgba(0,0,0,.45)}
.eyebrow.on-dark::before{background:var(--teal-600)}
.eyebrow.center{justify-content:center}

h1,h2,h3{font-family:var(--ff-display);line-height:1.04;font-weight:800;letter-spacing:-.01em}
.section-title{
  font-size:clamp(2rem,4.6vw,3.4rem);
  text-transform:uppercase;
  letter-spacing:-.015em;
  color:var(--teal-900);
}
.section-title.on-dark{color:var(--white)}
.lead{font-size:clamp(1.05rem,1.6vw,1.28rem);color:#39434a;font-weight:400;max-width:62ch}
.lead.on-dark{color:var(--steel-300)}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
section[id],div[id]{scroll-margin-top:84px}
section{padding-block:clamp(64px,9vw,128px)}
.bg-paper{background:var(--paper)}
.bg-paper-2{background:var(--paper-2)}
.bg-teal{background:var(--teal-800);color:var(--white)}
.bg-graphite{background:var(--graphite);color:var(--white)}

/* ---------- buttons ---------- */
.btn{
  font-family:var(--ff-label);
  text-transform:uppercase;
  letter-spacing:.14em;
  font-weight:600;
  font-size:.86rem;
  display:inline-flex;align-items:center;gap:.6em;
  padding:15px 28px;
  border-radius:var(--r);
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform .25s,background .25s,color .25s,border-color .25s;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--teal-700);color:#fff}
.btn-primary:hover{background:var(--teal-600);transform:translateY(-2px)}
.btn-ghost{border-color:var(--line-dark);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn-dark{background:var(--graphite);color:#fff}
.btn-dark:hover{background:var(--graphite-2);transform:translateY(-2px)}
.btn-outline{border-color:var(--teal-700);color:var(--teal-800)}
.btn-outline:hover{background:var(--teal-800);color:#fff;transform:translateY(-2px)}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .35s,box-shadow .35s,padding .35s;
  padding:18px 0;
  background:linear-gradient(180deg,rgba(8,34,36,.62) 0%,rgba(8,34,36,.28) 55%,transparent 100%);
}
.site-header.scrolled{
  background:rgba(12,46,48,.94);
  backdrop-filter:blur(10px);
  box-shadow:0 1px 0 rgba(255,255,255,.08);
  padding:11px 0;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:13px}
.brand img{height:62px;width:auto;transition:height .35s}
.scrolled .brand img{height:50px}
.nav{display:flex;align-items:center;gap:34px}
.nav a{
  font-family:var(--ff-label);
  text-transform:uppercase;
  letter-spacing:.1em;
  font-weight:500;
  font-size:.84rem;
  color:rgba(255,255,255,.82);
  position:relative;padding:4px 0;
  transition:color .2s;
}
.nav a::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--teal-600);transition:width .25s}
.nav a:hover{color:#fff}
.nav a:hover::after{width:100%}
.header-cta{display:flex;align-items:center;gap:14px}
.menu-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.menu-toggle span{width:24px;height:2px;background:#fff;display:block;transition:.3s}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero-bg img{position:absolute;left:0;top:-18%;width:100%;height:136%;object-fit:cover;object-position:50% 28%;will-change:transform}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(10,42,44,.94) 0%,rgba(10,42,44,.78) 32%,rgba(10,42,44,.25) 62%,rgba(10,42,44,.5) 100%),
    linear-gradient(0deg,rgba(10,42,44,.92) 0%,rgba(10,42,44,0) 45%);
}
.hero-inner{position:relative;z-index:2;width:100%;padding-bottom:clamp(56px,9vh,104px);padding-top:160px}
.hero h1{
  font-size:clamp(2.4rem,5.8vw,5rem);
  text-transform:uppercase;
  max-width:18ch;
  margin:22px 0 0;
  text-shadow:0 2px 30px rgba(0,0,0,.35);
}
.hero h1 em{font-style:normal;color:var(--steel-300)}
.hero .lead{margin-top:26px;color:#dfe4e6;max-width:54ch;text-shadow:0 1px 16px rgba(0,0,0,.3)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.hero-badge{
  display:inline-flex;align-items:center;gap:12px;
  margin-top:44px;padding-top:26px;border-top:1px solid var(--line-dark);
  font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.12em;
  font-size:.86rem;color:#cdd4d6;
}
.hero-badge b{color:#fff;font-weight:600}
.hero-badge .pet{width:34px;height:34px;border-radius:3px;background:#149E4B;display:grid;place-items:center;font-weight:800;font-size:.7rem;color:#fff;letter-spacing:0}
.scroll-hint{position:absolute;right:var(--pad);bottom:34px;z-index:3;display:flex;flex-direction:column;align-items:center;gap:10px;color:rgba(255,255,255,.6);font-family:var(--ff-label);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;writing-mode:vertical-rl}
.scroll-hint .bar{width:1px;height:46px;background:linear-gradient(var(--teal-600),transparent);animation:scrolly 2s infinite}
@keyframes scrolly{0%{transform:scaleY(.3);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}50.1%{transform-origin:bottom}100%{transform:scaleY(.3);transform-origin:bottom}}

/* ============================================================
   TRUST / CLIENT STRIP
   ============================================================ */
.trust{background:var(--white);border-bottom:1px solid var(--line);padding-block:38px}
.trust-inner{display:flex;align-items:center;gap:clamp(28px,5vw,72px);flex-wrap:wrap;justify-content:center}
.trust-label{font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.18em;font-size:.74rem;color:var(--steel);font-weight:600;max-width:160px;line-height:1.4;border-right:1px solid var(--line);padding-right:clamp(20px,3vw,48px)}
.trust-logos{display:flex;align-items:center;gap:clamp(26px,4vw,60px);flex-wrap:wrap;justify-content:center}
.trust-logos img{height:38px;width:auto;opacity:.62;filter:grayscale(1);transition:opacity .3s,filter .3s}
.trust-logos img:hover{opacity:1;filter:none}

/* ============================================================
   SECTION HEADER block
   ============================================================ */
.sec-head{max-width:760px;margin-bottom:clamp(40px,5vw,64px)}
.sec-head .section-title{margin-top:16px}
.sec-head .lead{margin-top:20px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head.center .lead{margin-inline:auto}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid{max-width:880px}
.about-copy .lead{margin-top:18px}
.about-copy p{margin-top:18px;color:#3a444b}
.about-copy p:first-of-type{margin-top:24px}
.about-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;border-top:1px solid var(--line);padding-top:34px}
.stat .n{font-family:var(--ff-display);font-weight:800;font-size:clamp(2.1rem,3.4vw,2.9rem);color:var(--teal-800);line-height:1}
.stat .l{font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.1em;font-size:.76rem;color:var(--steel);margin-top:8px;font-weight:500}
.about-media{position:relative}
.about-media .img-main{aspect-ratio:4/5;width:100%;object-fit:cover;border-radius:var(--r)}
.about-media .tag{
  position:absolute;left:-18px;bottom:28px;background:var(--teal-800);color:#fff;
  padding:20px 26px;border-radius:var(--r);max-width:230px;box-shadow:0 20px 50px rgba(10,42,44,.3);
}
.about-media .tag .k{font-family:var(--ff-display);font-weight:800;font-size:1.6rem;line-height:1}
.about-media .tag .v{font-size:.82rem;color:var(--steel-300);margin-top:6px;line-height:1.4}
.about-media .accent{position:absolute;right:-16px;top:-16px;width:120px;height:120px;border:2px solid var(--teal-600);border-radius:var(--r);z-index:-1}

/* ============================================================
   SERVICES
   ============================================================ */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.svc{background:var(--paper);padding:38px 32px;transition:background .3s,transform .3s;position:relative}
.svc:hover{background:#fff}
.svc .ic{width:46px;height:46px;color:var(--teal-700);margin-bottom:22px}
.svc .ic svg{width:100%;height:100%;stroke-width:1.4}
.svc h3{font-size:1.22rem;text-transform:uppercase;letter-spacing:-.005em;color:var(--teal-900);font-weight:700}
.svc p{margin-top:12px;font-size:.96rem;color:#4a545b;line-height:1.55}
.svc .no{position:absolute;top:30px;right:32px;font-family:var(--ff-label);font-size:.78rem;color:var(--steel-300);letter-spacing:.1em}

/* ============================================================
   VALUES
   ============================================================ */
.values{background:var(--teal-900);color:#fff;position:relative;overflow:hidden}
.values::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 80% -10%,rgba(28,96,98,.5),transparent 55%);pointer-events:none}
.values .wrap{position:relative;z-index:1}
.val-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:clamp(40px,5vw,60px)}
.val{padding:6px 26px;text-align:center;border-left:1px solid var(--line-dark)}
.val:first-child{border-left:0}
.val .ic{width:52px;height:52px;margin:0 auto 20px;color:var(--teal-600)}
.val .ic svg{width:100%;height:100%;stroke-width:1.3}
.val h3{font-size:1.12rem;text-transform:uppercase;letter-spacing:.04em;color:#fff;font-weight:700}
.val p{font-size:.88rem;color:var(--steel-300);margin-top:10px;line-height:1.5}

/* ============================================================
   LEADERSHIP
   ============================================================ */
.leaders{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,3vw,40px);margin-top:clamp(40px,5vw,60px)}
.leader{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:grid;grid-template-columns:auto 1fr}
.leader .ph{width:210px;height:100%;min-height:300px;object-fit:cover;object-position:50% 22%}
.leader .body{padding:34px 32px;display:flex;flex-direction:column;justify-content:center}
.leader .role{font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.16em;font-size:.74rem;color:var(--teal-700);font-weight:600}
.leader h3{font-size:1.55rem;margin-top:10px;color:var(--teal-900);text-transform:uppercase}
.leader p{margin-top:16px;font-size:.96rem;color:#4a545b}
.leader .quote{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);font-style:italic;color:var(--teal-800);font-size:1rem;line-height:1.5}

/* ============================================================
   GALLERY / IDENTITY
   ============================================================ */
.gal-grid{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-rows:200px;gap:14px;margin-top:clamp(40px,5vw,56px)}
.gal{position:relative;overflow:hidden;border-radius:var(--r)}
.gal img{width:100%;height:100%;object-fit:cover;transition:transform .8s ease}
.gal:hover img{transform:scale(1.05)}
.gal .cap{position:absolute;left:0;bottom:0;padding:14px 18px;font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.12em;font-size:.76rem;font-weight:600;color:#fff;z-index:2}
.gal::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(10,42,44,.7),transparent 55%);z-index:1}
.gal.a{grid-column:span 7;grid-row:span 2}
.gal.b{grid-column:span 5;grid-row:span 1}
.gal.c{grid-column:span 5;grid-row:span 1}
.gal.d{grid-column:span 4;grid-row:span 1}
.gal.e{grid-column:span 4;grid-row:span 1}
.gal.f{grid-column:span 4;grid-row:span 1}

/* ============================================================
   CLIENTS
   ============================================================ */
.clients-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:clamp(40px,5vw,56px)}
.client{background:#fff;aspect-ratio:3/2;display:grid;place-items:center;padding:30px;transition:background .3s}
.client:hover{background:var(--paper)}
.client img{max-height:64px;max-width:100%;width:auto;object-fit:contain}

/* ============================================================
   CONTACT / CTA
   ============================================================ */
.cta{background:var(--teal-800);color:#fff;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;right:-8%;top:-30%;width:520px;height:520px;border:2px solid var(--line-dark);border-radius:6px;transform:rotate(12deg);pointer-events:none}
.cta::after{content:"";position:absolute;right:6%;top:6%;width:300px;height:300px;border:2px solid var(--line-dark);border-radius:6px;transform:rotate(12deg);pointer-events:none}
.cta .wrap{position:relative;z-index:1}
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(40px,6vw,90px);align-items:start}
.contact-title{font-size:clamp(2rem,4.4vw,3.2rem);text-transform:uppercase;color:#fff}
.contact-copy{margin-top:22px;color:var(--steel-300);max-width:46ch}
.contact-list{margin-top:36px;display:flex;flex-direction:column;gap:22px}
.contact-item{display:flex;gap:16px;align-items:flex-start}
.contact-item .ic{width:38px;height:38px;flex:none;border:1px solid var(--line-dark);border-radius:var(--r);display:grid;place-items:center;color:var(--teal-600)}
.contact-item .ic svg{width:18px;height:18px}
.contact-item .k{font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.14em;font-size:.72rem;color:var(--steel)}
.contact-item .v{font-size:1.04rem;color:#fff;margin-top:2px}
.contact-item .v a{color:#fff;text-decoration:none;transition:color .2s}
.contact-item .v a:hover{color:var(--teal-600)}
.form{background:rgba(255,255,255,.05);border:1px solid var(--line-dark);border-radius:var(--r);padding:clamp(26px,3vw,38px)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-top:16px}
.field:first-child{margin-top:0}
.field label{display:block;font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.12em;font-size:.7rem;color:var(--steel-300);margin-bottom:8px}
.field input,.field textarea,.field select{
  width:100%;background:rgba(0,0,0,.18);border:1px solid var(--line-dark);border-radius:var(--r);
  padding:13px 15px;color:#fff;font-family:var(--ff-body);font-size:.98rem;transition:border-color .2s,background .2s;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--teal-600);background:rgba(0,0,0,.3)}
.field textarea{resize:vertical;min-height:96px}
.form .btn{width:100%;justify-content:center;margin-top:20px}
.form-note{font-size:.78rem;color:var(--steel);margin-top:14px;text-align:center}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--graphite);color:var(--steel-300);padding-block:clamp(54px,7vw,80px) 30px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;border-bottom:1px solid var(--line-dark)}
.footer .flogo{height:78px;width:auto;margin-bottom:22px}
.footer-about{font-size:.92rem;max-width:34ch;color:var(--steel)}
.footer h4{font-family:var(--ff-label);text-transform:uppercase;letter-spacing:.16em;font-size:.78rem;color:#fff;margin-bottom:18px;font-weight:600}
.footer-links li{margin-bottom:11px}
.footer-links a{font-size:.94rem;color:var(--steel-300);transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-contact li{font-size:.94rem;margin-bottom:11px;color:var(--steel-300)}
.footer-contact b{color:#fff;font-weight:600;display:block;font-family:var(--ff-label);letter-spacing:.04em;font-size:.74rem;text-transform:uppercase;margin-bottom:2px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;padding-top:26px;font-size:.82rem;color:var(--steel)}
.footer-bottom .badge{display:inline-flex;align-items:center;gap:8px}
.footer-bottom .pet{width:26px;height:26px;border-radius:3px;background:#149E4B;display:grid;place-items:center;font-weight:800;font-size:.6rem;color:#fff}

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
  .js .reveal.in{opacity:1;transform:none}
  .js .reveal.d1{transition-delay:.08s}
  .js .reveal.d2{transition-delay:.16s}
  .js .reveal.d3{transition-delay:.24s}
  .js .reveal.d4{transition-delay:.32s}
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .nav{gap:22px}
  .footer-top{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:880px){
  .site-header{background:rgba(10,42,44,.97);backdrop-filter:none;box-shadow:0 1px 0 rgba(255,255,255,.08);padding:12px 0}
  .site-header.scrolled{background:rgba(10,42,44,.98);backdrop-filter:none}
  .nav{
    position:fixed;inset:0;width:100%;
    background:var(--teal-950);flex-direction:column;align-items:center;justify-content:center;
    padding:96px 38px 48px;gap:6px;transform:translateX(100%);transition:transform .4s;z-index:90;
  }
  .nav a{font-size:1.55rem;padding:14px 0}
  .nav a::after{display:none}
  .nav.open{transform:none}
  .menu-toggle{display:flex;z-index:100;position:relative}
  .menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle.is-open span:nth-child(2){opacity:0}
  .menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .header-cta .btn{display:none}
  .about-grid{grid-template-columns:1fr}
  .about-media{order:-1;max-width:480px}
  .svc-grid{grid-template-columns:1fr 1fr}
  .val-grid{grid-template-columns:1fr 1fr 1fr}
  .val{border-left:0;border-top:1px solid var(--line-dark);padding-block:30px}
  .leaders{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .clients-grid{grid-template-columns:repeat(3,1fr)}
  .gal-grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:170px}
  .gal.a,.gal.b,.gal.c,.gal.d,.gal.e,.gal.f{grid-column:span 1;grid-row:span 1}
  .gal.a{grid-column:span 2;grid-row:span 2}
}
@media (max-width:560px){
  body{font-size:16px}
  .hero h1{font-size:clamp(2.2rem,10vw,3rem)}
  .svc-grid{grid-template-columns:1fr}
  .val-grid{grid-template-columns:1fr 1fr}
  .clients-grid{grid-template-columns:repeat(2,1fr)}
  .form .row{grid-template-columns:1fr}
  .leader{grid-template-columns:1fr}
  .leader .ph{width:100%;height:280px}
  .trust-label{border-right:0;border-bottom:1px solid var(--line);padding:0 0 16px;max-width:none;text-align:center}
  .about-stats{grid-template-columns:1fr 1fr}
  .footer-top{grid-template-columns:1fr}
  .hero-badge{flex-wrap:wrap}
}