:root{
  --header-h:76px;
  --bg:#04070d;
  --bg-soft:#070b15;
  --panel:rgba(255,255,255,.045);
  --panel-strong:rgba(255,255,255,.075);
  --line:rgba(255,255,255,.10);
  --line-soft:rgba(255,255,255,.06);
  --text:#f4f6fb;
  --text-mute:rgba(244,246,251,.7);
  --text-faint:rgba(244,246,251,.44);
  --accent:#7fa0e0;
  --accent-strong:#b7c9ef;
  --accent-dim:rgba(127,160,224,.14);
  --bg-light:#ffffff;
  --btn-solid-bg:var(--text);
  --btn-solid-bg-hover:#dfe6f5;
  --btn-solid-text:#0a1120;
  --whatsapp:#25D366;
  --radius-pill:999px;
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --maxw:1180px;
  --ease-out:cubic-bezier(.23,1,.32,1);
  --ease-in-out:cubic-bezier(.77,0,.175,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:#12151c;
  background:var(--bg-light);
  -webkit-font-smoothing:antialiased;
  letter-spacing:-0.005em;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block;}
h1,h2{font-family:'Instrument Serif',Georgia,serif;font-weight:400;margin:0;color:var(--text);}
h3,h4{font-family:'Inter',sans-serif;font-weight:600;margin:0;color:var(--text);letter-spacing:-0.01em;}
p{margin:0;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* logo (embutida em 2 versões: branca para os trechos escuros, azul para o rodapé, que agora é claro) */
.logo-mark{
  background-image:url("logo-alf-branca.png");
  background-repeat:no-repeat;
  background-position:left center;
  background-size:contain;
  display:block;
}
.logo-mark.on-light{
  background-image:url("logo-alf-azul.png");
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:'Inter',sans-serif;font-weight:600;font-size:14.5px;letter-spacing:-.005em;
  padding:13px 24px;border-radius:var(--radius-pill);white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform 160ms var(--ease-out),border-color 200ms ease,background-color 200ms ease,opacity 200ms ease;
}
.btn:active{transform:scale(.97);}
.btn-solid{background:var(--btn-solid-bg);color:var(--btn-solid-text);}
.btn-solid:hover{background:var(--btn-solid-bg-hover);}
.btn-accent{background:linear-gradient(180deg,#8fabe0,#6c8ed4);color:#fff;}
.btn-accent:hover{filter:brightness(1.08);}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line);}
.btn-ghost:hover{border-color:rgba(255,255,255,.32);background:rgba(255,255,255,.03);}
.btn-icon{width:20px;height:20px;border-radius:50%;background:var(--whatsapp);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.btn-icon svg{width:12px;height:12px;color:#fff;}

/* light zone: everything from "Sobre a ALF" down runs on a white background, same glass system */
.light-zone{
  --bg:var(--bg-light);
  --panel:rgba(15,18,26,.035);
  --panel-strong:rgba(15,18,26,.05);
  --line:rgba(15,18,26,.12);
  --line-soft:rgba(15,18,26,.08);
  --text:#12151c;
  --text-mute:#4a5061;
  --text-faint:#5f6577;
  --accent:#3f63a8;
  --accent-strong:#2c4a86;
  --accent-dim:rgba(63,99,168,.08);
  --btn-solid-bg:#132244;
  --btn-solid-bg-hover:#1c3358;
  --btn-solid-text:#ffffff;
  background:var(--bg);
}
.light-zone .map-frame iframe{filter:none;}

/* dark glass cards floating on the white zone: darker surface, light text, more legible than a barely-there light card */
.light-zone .service-card,
.light-zone .contact-card,
.light-zone .contact-form{
  --panel:rgba(10,14,24,.9);
  --line:rgba(255,255,255,.12);
  --line-soft:rgba(255,255,255,.10);
  --text:#f4f6fb;
  --text-mute:rgba(244,246,251,.72);
  --text-faint:rgba(244,246,251,.52);
  --accent:#7fa0e0;
  --accent-strong:#a9c2ec;
  --btn-solid-bg:#f4f6fb;
  --btn-solid-bg-hover:#dfe6f5;
  --btn-solid-text:#0a1120;
}
.light-zone .service-card{background:linear-gradient(160deg,rgba(16,21,34,.92),rgba(8,11,19,.94));backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);}
.light-zone .service-card.featured{background:linear-gradient(160deg,rgba(35,54,94,.94),rgba(8,11,19,.94));}
.light-zone .contact-card,
.light-zone .contact-form{backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);}

/* header / nav */
header{position:sticky;top:0;z-index:60;}
.nav-shell{
  position:relative;isolation:isolate;width:100%;
  background:rgba(6,9,16,.72);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);
  box-shadow:0 12px 32px -20px rgba(0,0,0,.7);
}
.nav-shell::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  border-bottom:1px solid rgba(255,255,255,.12);
  background:linear-gradient(180deg,rgba(255,255,255,.06) 0%,rgba(255,255,255,0) 60%);
}
.nav-inner{
  position:relative;
  max-width:1160px;margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px;height:76px;
}
.brand{display:flex;align-items:center;}
.nav-logo{width:168px;height:40px;}
nav.menu{display:flex;align-items:center;justify-content:center;gap:30px;}
nav.menu a{font-size:14px;font-weight:500;color:var(--text-mute);transition:color 200ms ease;}
nav.menu a:hover{color:var(--text);}
.nav-actions{display:flex;align-items:center;gap:16px;}
#navCta{
  --tx:0px;--ty:0px;
  padding:11px 20px 11px 16px;
  transform:translate(var(--tx),var(--ty));
  transition:transform 160ms var(--ease-out);
}
.menu-toggle{display:none;width:40px;height:40px;border-radius:50%;border:none;background:transparent;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;}
.menu-toggle span{width:18px;height:1.6px;background:var(--text);border-radius:2px;transition:transform 220ms var(--ease-in-out),opacity 220ms ease;}

main{display:block;}

/* hero */
.hero{position:relative;min-height:100dvh;display:flex;align-items:center;overflow:hidden;margin-top:calc(var(--header-h) * -1);padding:calc(110px + var(--header-h)) 0 90px;background:var(--bg);}
.hero-video{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0;background:var(--bg);}
.hero-video video{width:100%;height:100%;object-fit:cover;opacity:.85;}
.hero-video-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,7,13,.5) 0%,rgba(4,7,13,.72) 55%,rgba(4,7,13,.94) 100%);}

.hero-inner{position:relative;z-index:1;max-width:800px;margin:0 auto;text-align:center;display:flex;flex-direction:column;align-items:center;}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-strong);margin-bottom:22px;}
.hero-inner h1{font-size:clamp(32px,4.6vw,54px);line-height:1.14;letter-spacing:-.01em;margin-bottom:22px;background:linear-gradient(180deg,#ffffff 0%,rgba(255,255,255,.82) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.hero-inner .lead{font-size:16.5px;line-height:1.6;color:var(--text-mute);max-width:560px;margin:0 auto 34px;}
.hero-ctas{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:34px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;}
.hero-meta-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-faint);padding:8px 16px;border:1px solid var(--line-soft);border-radius:var(--radius-pill);background:rgba(255,255,255,.02);}
.hero-meta-item svg{width:14px;height:14px;color:var(--accent);flex-shrink:0;}

/* stat strip (glass, overlaps hero base; background carries the hero-to-white transition) */
.stat-strip{position:relative;z-index:2;margin-top:-56px;padding:0 24px;background:linear-gradient(180deg,var(--bg) 0%,var(--bg) 82%,var(--bg-light) 100%);}
.stat-card{
  max-width:var(--maxw);margin:0 auto;position:relative;isolation:isolate;
  display:flex;border-radius:var(--radius-lg);
  background:var(--panel-strong);backdrop-filter:blur(22px) saturate(160%);-webkit-backdrop-filter:blur(22px) saturate(160%);
  box-shadow:0 30px 70px -30px rgba(0,0,0,.75);
}
.stat-card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1.2px;pointer-events:none;
  background:linear-gradient(180deg,rgba(255,255,255,.4) 0%,rgba(255,255,255,.12) 25%,rgba(255,255,255,0) 50%,rgba(255,255,255,.08) 75%,rgba(255,255,255,.35) 100%);
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
}
.stat-item{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center;gap:9px;padding:28px 20px;}
.stat-icon{width:34px;height:34px;color:var(--accent-strong);}
.stat-icon svg{width:100%;height:100%;}
.stat-title{font-size:15px;font-weight:600;letter-spacing:-.01em;color:var(--text);}
.stat-caption{font-size:12.5px;color:var(--text-faint);}
.stat-divider{width:1px;background:var(--line-soft);margin:20px 0;}

/* section shared */
section{padding:72px 0;position:relative;}
.section-head{max-width:560px;margin:0 auto 52px;text-align:center;}
.section-head.left{margin:0 0 52px;text-align:left;}
.section-head .kicker{display:block;font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-strong);margin-bottom:14px;}
.section-head .kicker.plain{display:inline;font-size:15px;font-weight:600;letter-spacing:0;text-transform:none;color:var(--accent-strong);margin:0;}
.section-head h2{font-size:clamp(26px,3.2vw,36px);line-height:1.2;margin-bottom:14px;}
.section-head p{font-size:15.5px;color:var(--text-mute);line-height:1.6;}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease-out),transform .6s var(--ease-out);}
.reveal.in-view{opacity:1;transform:translateY(0);}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start;}
.about-copy p{font-size:15.5px;line-height:1.7;color:var(--text-mute);margin-bottom:18px;}
.about-copy p:last-child{margin-bottom:0;}
.about-features{display:flex;flex-direction:column;}
.feature{display:flex;align-items:flex-start;gap:18px;padding:22px 0;border-bottom:1px solid var(--line-soft);}
.feature:first-child{padding-top:0;}
.feature-icon{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--accent-strong);transition:background-color 220ms ease,color 220ms ease,border-color 220ms ease;}
.feature-icon svg{width:19px;height:19px;}
.feature:hover .feature-icon{background:var(--accent);border-color:var(--accent);color:#fff;}
.feature-text h4{font-size:15.5px;margin-bottom:5px;}
.feature-text p{font-size:14px;color:var(--text-faint);line-height:1.55;}

/* services: top edge reads as a huge rounded card lifting off the white section above it */
.services{
  background:var(--bg);
  border-top-left-radius:64px;
  border-top-right-radius:64px;
  box-shadow:0 -36px 70px -24px rgba(0,0,0,.5);
}

/* services bento */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:minmax(150px,auto);gap:16px;}
.service-card{
  position:relative;isolation:isolate;border-radius:var(--radius-lg);padding:28px;
  border:1px solid var(--line-soft);
  background:linear-gradient(160deg,rgba(5,8,15,.78),rgba(5,8,15,.6));
  transition:border-color 240ms ease,transform 240ms var(--ease-out);
  --mx:50%;--my:50%;
}
.service-card::after{
  content:"";position:absolute;inset:0;z-index:0;border-radius:inherit;pointer-events:none;
  background-image:linear-gradient(195deg,rgba(3,7,15,.62) 0%,rgba(3,7,15,.5) 45%,rgba(3,7,15,.6) 100%),var(--service-image);
  background-size:cover;background-position:center;opacity:.94;
}
.service-card > *{position:relative;z-index:2;}
.service-card::before{
  content:"";position:absolute;inset:0;z-index:1;border-radius:inherit;pointer-events:none;opacity:0;
  background:radial-gradient(220px circle at var(--mx) var(--my),rgba(127,160,224,.16),transparent 65%);
  transition:opacity 260ms ease;border-radius:inherit;
}
.service-card:hover::before{opacity:1;}
.service-card:hover{border-color:rgba(255,255,255,.22);transform:translateY(-3px);}
.service-card.featured{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(160deg,rgba(9,18,35,.82),rgba(5,8,15,.58));border-color:rgba(255,255,255,.14);}
.service-card.featured::after{background-image:linear-gradient(115deg,rgba(4,9,20,.48) 0%,rgba(4,9,20,.22) 58%,rgba(4,9,20,.06) 100%),var(--service-image);opacity:.96;}
.service-num{display:block;font-family:'Instrument Serif',serif;font-size:15px;color:var(--text-faint);margin-bottom:14px;}
.service-icon{width:38px;height:38px;color:var(--accent-strong);margin-bottom:16px;}
.service-icon svg{width:100%;height:100%;}
.service-card h3{font-size:17px;margin-bottom:9px;}
.service-card.featured h3{font-size:22px;}
.service-card p{font-size:13.5px;color:var(--text-faint);line-height:1.55;}
.service-link{display:inline-flex;align-items:center;gap:7px;margin-top:20px;font-size:13.5px;font-weight:600;color:var(--accent-strong);}
.service-link svg{width:15px;height:15px;transition:transform 200ms var(--ease-out);}
.service-link:hover svg{transform:translateX(3px);}

/* marquee */
.marquee{overflow:hidden;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);padding:22px 0;background:var(--bg);}
.marquee-track{display:flex;width:max-content;gap:14px;animation:marquee 34s linear infinite;}
.marquee:hover .marquee-track{animation-play-state:paused;}
.marquee-item{font-family:'Instrument Serif',serif;font-style:italic;font-size:20px;color:var(--text-faint);white-space:nowrap;}
.marquee-sep{color:var(--accent);opacity:.5;}
@keyframes marquee{from{transform:translateX(0);}to{transform:translateX(-50%);}}

/* projects gallery (carrossel infinito de fotos) */
.gallery-scroll{overflow:hidden;margin:0 -24px 36px;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 64px,#000 calc(100% - 64px),transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 64px,#000 calc(100% - 64px),transparent 100%);}
.gallery-track{display:flex;width:max-content;gap:16px;padding-inline:24px;animation-name:galleryScroll;animation-timing-function:linear;animation-iteration-count:infinite;}
.gallery-scroll:hover .gallery-track{animation-play-state:paused;}
.gallery-item{flex:0 0 auto;width:min(62vw,260px);aspect-ratio:3/4;overflow:hidden;border-radius:var(--radius-lg);background:var(--line-soft);}
.gallery-item img{display:block;width:100%;height:100%;object-fit:cover;transform:scale(1.03);}
@keyframes galleryScroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}
@media(prefers-reduced-motion:reduce){.gallery-track{animation:none;}.gallery-scroll{overflow-x:auto;}}

/* diff */
.diff-grid{display:grid;grid-template-columns:repeat(2,1fr);}
.diff-item{padding:30px 0;border-top:1px solid var(--line-soft);display:grid;grid-template-columns:56px 1fr;gap:18px;align-items:start;}
.diff-item:nth-child(1),.diff-item:nth-child(2){border-top:1px solid var(--line-soft);}
.idx{font-family:'Instrument Serif',serif;font-size:26px;color:var(--accent-strong);}
.diff-item h4{font-size:16px;margin-bottom:7px;}
.diff-item p{font-size:14px;color:var(--text-faint);line-height:1.55;}

/* contact */
.contact-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:28px;align-items:stretch;}
.contact-card{border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--panel);padding:36px;display:flex;flex-direction:column;gap:22px;min-width:0;}
.contact-card h3{font-size:19px;}
.contact-row{display:flex;gap:14px;align-items:flex-start;}
.contact-row svg{width:19px;height:19px;color:var(--accent-strong);flex-shrink:0;margin-top:2px;}
.contact-row .label{font-size:12px;color:var(--text-faint);margin-bottom:3px;}
.contact-row .value{font-size:15px;color:var(--text);line-height:1.5;}
.map-frame{margin-top:20px;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);min-height:340px;}
.map-frame iframe{width:100%;height:100%;min-height:340px;border:0;filter:grayscale(.25) brightness(.92) contrast(1.05);}

.contact-form{border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--panel);padding:36px;display:flex;flex-direction:column;gap:16px;min-width:0;}
.contact-form .field{display:flex;flex-direction:column;gap:6px;min-width:0;}
.contact-form label{font-size:12.5px;font-weight:600;color:var(--text-mute);}
.contact-form input,
.contact-form select,
.contact-form textarea{
  width:100%;font-family:inherit;font-size:14.5px;color:var(--text);
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:11px 14px;transition:border-color 180ms ease;resize:vertical;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus{outline:none;border-color:var(--accent);}
.contact-form input::placeholder,
.contact-form textarea::placeholder{color:var(--text-faint);}
.contact-form .btn{align-self:flex-start;}
.contact-form .field-note{font-size:12.5px;color:var(--text-faint);margin:0;}

/* footer */
footer{border-top:1px solid var(--line-soft);padding:48px 0 32px;}
.footer-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:24px;padding-bottom:28px;border-bottom:1px solid var(--line-soft);margin-bottom:24px;}
.footer-logo{width:158px;height:38px;}
.footer-nav{display:flex;gap:26px;flex-wrap:wrap;}
.footer-nav a{font-size:13.5px;color:var(--text-mute);transition:color 200ms ease;}
.footer-nav a:hover{color:var(--text);}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--text-faint);}

/* floating whatsapp */
.wa-float{
  position:fixed;bottom:24px;right:24px;z-index:70;
  width:56px;height:56px;border-radius:50%;
  background:var(--whatsapp);display:flex;align-items:center;justify-content:center;
  box-shadow:0 14px 34px -10px rgba(0,0,0,.6);
  transition:transform 160ms var(--ease-out);
}
.wa-float:active{transform:scale(.94);}
.wa-float svg{width:26px;height:26px;color:#fff;}

/* responsive */
@media (max-width:900px){
  .about-grid{grid-template-columns:1fr;gap:44px;}
  .contact-grid{grid-template-columns:1fr;}
  .service-grid{grid-template-columns:repeat(2,1fr);}
  .service-card.featured{grid-column:span 2;grid-row:span 1;}
  .diff-grid{grid-template-columns:1fr;}
  .diff-item:nth-child(2){border-top:none;}
}
@media (max-width:720px){
  .nav-inner{display:flex;justify-content:space-between;}
  #navCta{display:none;}
  nav.menu{position:absolute;top:calc(100% + 10px);left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-md);padding:10px;
    opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity 220ms ease,transform 220ms var(--ease-out),visibility 220ms;}
  nav.menu.open{opacity:1;visibility:visible;transform:translateY(0);}
  nav.menu a{padding:12px 14px;border-radius:10px;}
  nav.menu a:hover{background:rgba(255,255,255,.04);}
  .menu-toggle{display:flex;}
  .hero{padding-bottom:140px;}
  .services{border-top-left-radius:32px;border-top-right-radius:32px;}
  .stat-card{flex-direction:column;}
  .stat-divider{width:auto;height:1px;margin:0 20px;}
  .service-grid{grid-template-columns:1fr;}
  .service-card.featured{grid-column:span 1;}
  section{padding:52px 0;}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  .marquee-track{animation:none;}
  .btn,.wa-float,.feature-icon,.service-link svg{transition:none;}
}