/* ============ ISTRATEGIA — SITE INSTITUCIONAL (istrategia.com.br) ============
   Identidade: predominância de branco, preto e tons de cinza,
   azul institucional APENAS como cor de destaque. Muito espaço em branco.
   Fontes locais (pilha de sistema) — sem download de webfonts.
   Folha compartilhada entre todas as páginas.
================================================================================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --branco:#FFFFFF;
  --off:#F7F8F9;
  --linha:#E6E8EA;
  --cinza-400:#9AA3AA;
  --cinza-500:#6A737B;
  --cinza-700:#3C4348;
  --preto:#14181B;

  --azul:#10497E;          /* destaque institucional — uso contido */
  --azul-escuro:#0B3560;
  --azul-claro:#EAF1F8;    /* fundo de apoio, quase branco */

  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --container:1180px;
  --sv:clamp(88px,11vw,150px);
}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--branco);color:var(--cinza-700);line-height:1.75;font-size:17px;font-weight:400;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
section{padding:var(--sv) 0}

.kicker{font-size:.74rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--azul);display:flex;align-items:center;gap:12px;margin-bottom:18px}
.kicker::before{content:"";width:26px;height:2px;background:var(--azul)}
h1.title,h2.title{font-weight:700;font-size:clamp(1.6rem,3vw,2.3rem);line-height:1.25;letter-spacing:-.01em;margin-bottom:20px;color:var(--preto)}
.lead{font-size:1.05rem;color:var(--cinza-500);max-width:640px;line-height:1.8}
.center{text-align:center}
.center .kicker{justify-content:center}
.center .lead{margin:0 auto}

.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:.86rem;letter-spacing:.04em;padding:15px 32px;border:1px solid var(--preto);transition:all .22s;cursor:pointer;background:none}
.btn--solid{background:var(--preto);color:var(--branco)}
.btn--solid:hover{background:var(--azul);border-color:var(--azul)}
.btn--ghost{color:var(--preto)}
.btn--ghost:hover{border-color:var(--azul);color:var(--azul)}
.btn--blue{background:var(--azul);border-color:var(--azul);color:var(--branco)}
.btn--blue:hover{background:var(--azul-escuro);border-color:var(--azul-escuro)}

/* ---------- header ---------- */
header{position:fixed;inset:0 0 auto 0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--linha)}
.nav{display:flex;align-items:center;height:74px;gap:18px}
.logo{display:inline-flex;align-items:center;flex-shrink:0;margin-right:auto}
.logo img{height:28px;width:auto}
.nav ul{display:flex;gap:24px;flex-wrap:wrap}
.nav-cta{flex-shrink:0;display:inline-flex;align-items:center;gap:8px;background:var(--azul);color:var(--branco);font-weight:600;font-size:.8rem;letter-spacing:.04em;padding:11px 20px;border:1px solid var(--azul);transition:all .2s;white-space:nowrap}
.nav-cta:hover{background:var(--azul-escuro);border-color:var(--azul-escuro)}
.nav ul a{font-size:.8rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--cinza-500);transition:color .2s;padding:6px 0;border-bottom:2px solid transparent}
.nav ul a:hover,.nav ul a.ativo{color:var(--preto);border-bottom-color:var(--azul)}
.nav-toggle{display:none}
.nav-burger{display:none;cursor:pointer;font-size:1.6rem;line-height:1;color:var(--preto);user-select:none;padding:2px 8px}
@media(max-width:1080px){
  .nav{position:relative}
  .nav-burger{display:block}
  .nav ul{display:none;position:absolute;top:74px;left:-24px;right:-24px;flex-direction:column;gap:0;background:var(--branco);border-top:1px solid var(--linha);border-bottom:1px solid var(--linha);padding:6px 24px;box-shadow:0 14px 26px rgba(0,0,0,.07)}
  .nav-toggle:checked ~ nav ul{display:flex}
  .nav ul a{padding:13px 0;border-bottom:1px solid var(--off);border-top:none;width:100%}
  .nav ul li:last-child a{border-bottom:none}
}

/* ---------- breadcrumb ---------- */
.breadcrumb{font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--cinza-400);margin-bottom:22px}
.breadcrumb a:hover{color:var(--azul)}
.breadcrumb span{margin:0 8px;color:var(--linha)}

/* ---------- hero (home) ---------- */
.hero{padding:190px 0 110px;background:var(--branco)}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}
.hero h1{font-weight:700;font-size:clamp(2rem,4vw,3rem);line-height:1.18;letter-spacing:-.015em;color:var(--preto);margin-bottom:24px}
.hero p.subtitle{font-size:1.12rem;color:var(--cinza-500);max-width:560px;margin-bottom:38px;line-height:1.8}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap}
.hero-visual{position:relative}
@media(max-width:920px){.hero .container{grid-template-columns:1fr}.hero-visual{display:none}}

/* ---------- hero de página interna ---------- */
.page-hero{padding:170px 0 80px;background:var(--off);border-bottom:1px solid var(--linha)}
.page-hero h1{font-weight:700;font-size:clamp(1.8rem,3.6vw,2.7rem);line-height:1.22;letter-spacing:-.015em;color:var(--preto);margin-bottom:20px;max-width:800px}
.page-hero p.subtitle{font-size:1.08rem;color:var(--cinza-500);max-width:660px;line-height:1.8}

/* ---------- indicadores ---------- */
.stats{border-top:1px solid var(--linha);border-bottom:1px solid var(--linha);padding:0}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:44px 24px;text-align:center;border-left:1px solid var(--linha)}
.stat:first-child{border-left:none}
.stat strong{display:block;font-size:1.6rem;font-weight:700;letter-spacing:-.01em;color:var(--preto);margin-bottom:6px}
.stat span{font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;color:var(--cinza-500)}
@media(max-width:820px){.stats .container{grid-template-columns:repeat(2,1fr)}.stat:nth-child(3){border-left:none}}

/* ---------- serviços (o que fazemos) ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:54px}
.svc{border:1px solid var(--linha);padding:42px 38px;background:var(--branco);transition:border-color .22s}
.svc:hover{border-color:var(--azul)}
.svc h3{font-size:1.15rem;font-weight:700;color:var(--preto);margin-bottom:16px}
.svc ul{margin-bottom:22px}
.svc li{font-size:.94rem;color:var(--cinza-500);padding:7px 0 7px 20px;position:relative;border-bottom:1px solid var(--off)}
.svc li::before{content:"";position:absolute;left:0;top:17px;width:8px;height:2px;background:var(--azul)}
.svc a.mais{font-size:.82rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--azul)}
.svc a.mais:hover{color:var(--azul-escuro)}
@media(max-width:820px){.svc-grid{grid-template-columns:1fr}}

/* ---------- fluxo (como trabalhamos / fluxogramas) ---------- */
.flow{display:flex;flex-wrap:wrap;justify-content:center;gap:0;margin-top:54px}
.flow-step{flex:1 1 150px;max-width:190px;text-align:center;padding:26px 14px;position:relative}
.flow-step .n{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid var(--preto);font-weight:700;font-size:.9rem;color:var(--preto);margin-bottom:14px}
.flow-step span{display:block;font-size:.86rem;font-weight:600;color:var(--cinza-700);line-height:1.45}
.flow-step:not(:last-child)::after{content:"→";position:absolute;right:-9px;top:36px;color:var(--cinza-400);font-size:1rem}
@media(max-width:820px){.flow{flex-direction:column;align-items:center}.flow-step:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-12px;transform:translateX(-50%)}}

/* fluxograma vertical (páginas licitações / importação) */
.vflow{max-width:640px;margin:54px auto 0}
.vflow-step{border:1px solid var(--linha);border-left:3px solid var(--azul);padding:24px 28px;background:var(--branco);position:relative}
.vflow-step+.vflow-step{margin-top:34px}
.vflow-step+.vflow-step::before{content:"↓";position:absolute;top:-30px;left:50%;transform:translateX(-50%);color:var(--cinza-400)}
.vflow-step h3{font-size:1rem;font-weight:700;color:var(--preto);margin-bottom:6px}
.vflow-step p{font-size:.92rem;color:var(--cinza-500)}

/* ---------- segmentos (cards) ---------- */
.seg-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:54px}
.seg-card{border:1px solid var(--linha);padding:36px 28px;background:var(--branco);transition:border-color .22s,transform .22s;display:block}
.seg-card:hover{border-color:var(--azul);transform:translateY(-3px)}
.seg-card .ico{width:38px;height:38px;color:var(--azul);margin-bottom:18px}
.seg-card .ico svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.5}
.seg-card h3{font-size:1rem;font-weight:700;color:var(--preto);margin-bottom:8px}
.seg-card p{font-size:.86rem;color:var(--cinza-500);line-height:1.6}
.seg-card small{display:inline-block;margin-top:14px;font-size:.76rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--azul)}
@media(max-width:1000px){.seg-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.seg-grid{grid-template-columns:1fr}}

/* ---------- diferenciais ---------- */
.dif-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1px;background:var(--linha);border:1px solid var(--linha);margin-top:54px}
.dif-item{background:var(--branco);padding:40px 30px}
.dif-item h3{font-size:1rem;font-weight:700;color:var(--preto);margin-bottom:10px;padding-top:16px;border-top:2px solid var(--azul);display:inline-block}
.dif-item p{font-size:.9rem;color:var(--cinza-500)}
@media(max-width:920px){.dif-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.dif-grid{grid-template-columns:1fr}}

/* ---------- fabricantes (logo + país + área) ---------- */
.fab-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;margin-top:54px}
.fab-card{flex:1 1 240px;max-width:272px;border:1px solid var(--linha);background:var(--branco);padding:30px 26px 26px;text-align:center;transition:border-color .22s}
.fab-card:hover{border-color:var(--azul)}
.fab-logo{height:58px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;border-bottom:1px solid var(--off);padding-bottom:16px}
.fab-logo img{max-height:52px;max-width:170px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.85;transition:all .25s}
.fab-card:hover .fab-logo img{filter:none;opacity:1}
.fab-logo .marca{font-weight:700;font-size:1.18rem;letter-spacing:.01em;color:var(--preto)}
.fab-pais{display:block;font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--azul);margin-bottom:8px}
.fab-desc{font-size:.86rem;color:var(--cinza-500);line-height:1.5}
@media(max-width:560px){.fab-card{flex:1 1 100%;max-width:none}}

/* ---------- clientes ---------- */
.cli-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:1px;background:var(--linha);border:1px solid var(--linha);margin-top:54px}
.cli-item{flex:1 1 200px;max-width:236px;background:var(--branco);padding:34px 20px;display:flex;align-items:center;justify-content:center;min-height:110px}
.cli-item img{max-height:52px;width:auto;filter:grayscale(1);opacity:.75;transition:all .25s}
.cli-item:hover img{filter:none;opacity:1}
.cli-item span{font-size:.82rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--cinza-400);text-align:center}

/* ---------- CTA ---------- */
.cta{background:var(--preto);color:var(--branco);text-align:center}
.cta h2{font-weight:700;font-size:clamp(1.5rem,3vw,2.2rem);letter-spacing:-.01em;margin-bottom:30px}
.cta .lead{color:var(--cinza-400);margin:0 auto 34px}
.cta .btn{border-color:var(--branco);color:var(--branco)}
.cta .btn:hover{background:var(--azul);border-color:var(--azul)}

/* ---------- listas de conteúdo (páginas internas) ---------- */
.bloco-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:54px}
.bloco{border:1px solid var(--linha);padding:34px 30px;background:var(--branco)}
.bloco h3{font-size:1rem;font-weight:700;color:var(--preto);margin-bottom:10px}
.bloco p{font-size:.9rem;color:var(--cinza-500)}
.bloco li{font-size:.9rem;color:var(--cinza-500);padding:6px 0 6px 18px;position:relative;border-bottom:1px solid var(--off)}
.bloco li::before{content:"";position:absolute;left:0;top:16px;width:8px;height:2px;background:var(--azul)}
@media(max-width:920px){.bloco-grid{grid-template-columns:1fr}}

.lista-tecnica{margin-top:34px;max-width:760px}
.lista-tecnica li{padding:14px 0 14px 26px;border-bottom:1px solid var(--linha);position:relative;font-size:.98rem;color:var(--cinza-700)}
.lista-tecnica li::before{content:"";position:absolute;left:0;top:26px;width:10px;height:2px;background:var(--azul)}
.lista-tecnica li strong{color:var(--preto);font-weight:600}

/* ---------- caso de uso com foto ---------- */
.caso-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.caso-foto{position:relative;overflow:hidden;border:1px solid var(--linha);aspect-ratio:4/3}
.caso-foto img{width:100%;height:100%;object-fit:cover;display:block}
.caso-foto figcaption{position:absolute;left:0;bottom:0;background:rgba(20,24,27,.72);color:#fff;font-size:.74rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:9px 15px}
@media(max-width:820px){.caso-grid{grid-template-columns:1fr}}

/* ---------- timeline (quem somos) ---------- */
.timeline{max-width:680px;margin:54px auto 0;position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:1px;background:var(--linha)}
.tl-item{position:relative;padding-bottom:40px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-30px;top:8px;width:9px;height:9px;background:var(--azul);border-radius:50%}
.tl-item .ano{font-size:.8rem;font-weight:700;letter-spacing:.1em;color:var(--azul);text-transform:uppercase;margin-bottom:4px}
.tl-item h3{font-size:1.05rem;font-weight:700;color:var(--preto);margin-bottom:6px}
.tl-item p{font-size:.94rem;color:var(--cinza-500)}

/* ---------- centro de conhecimento ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:54px}
.cat-card{border:1px solid var(--linha);padding:30px 26px;background:var(--branco)}
.cat-card h3{font-size:.98rem;font-weight:700;color:var(--preto);margin-bottom:6px}
.cat-card p{font-size:.84rem;color:var(--cinza-500)}
@media(max-width:920px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.cat-grid{grid-template-columns:1fr}}

/* ---------- contato ---------- */
.contato-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-top:54px;align-items:start}
.contato-info h3{font-size:.8rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--cinza-400);margin:26px 0 8px}
.contato-info h3:first-child{margin-top:0}
.contato-info a{font-size:1.05rem;color:var(--preto);border-bottom:1px solid transparent}
.contato-info a:hover{color:var(--azul);border-bottom-color:var(--azul)}
.form label{display:block;font-size:.8rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--cinza-500);margin:20px 0 6px}
.form label:first-child{margin-top:0}
.form input,.form textarea,.form select{width:100%;border:1px solid var(--linha);padding:13px 16px;font-family:var(--font);font-size:.95rem;color:var(--preto);background:var(--branco)}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--azul)}
.form input[type=file]{padding:10px 14px;font-size:.88rem;color:var(--cinza-500)}
.form .campo-hint{font-size:.8rem;color:var(--cinza-400);margin-top:6px}
.form-consent{display:flex;align-items:flex-start;gap:10px;margin-top:22px;font-size:.86rem;color:var(--cinza-500);line-height:1.5}
.form-consent input{width:auto;margin-top:3px;flex-shrink:0}
.form-consent a{color:var(--azul);border-bottom:1px solid transparent}
.form-consent a:hover{border-bottom-color:var(--azul)}
.form button{margin-top:22px}
@media(max-width:820px){.contato-grid{grid-template-columns:1fr}}

/* ---------- footer ---------- */
footer{background:var(--preto);color:var(--cinza-400);padding:64px 0 34px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:50px;margin-bottom:50px}
.foot-grid h4{font-size:.76rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--branco);margin-bottom:18px}
.foot-grid li{margin-bottom:10px;font-size:.9rem}
.foot-grid a:hover{color:var(--branco)}
.foot-slogan{margin-top:18px;font-size:.9rem;color:var(--cinza-500)}
.foot-inst{margin-top:16px;font-size:.82rem;color:var(--cinza-500);line-height:1.75}
.form-msg{display:none;margin-bottom:28px;padding:16px 20px;border-left:3px solid var(--azul);font-size:.95rem}
.form-msg.ok{display:block;background:var(--azul-claro);color:var(--azul-escuro);border-color:var(--azul)}
.form-msg.erro{display:block;background:#FBECEC;color:#8A2A2A;border-color:#B84A4A}
.hp-field{position:absolute;left:-5000px;top:auto;width:1px;height:1px;overflow:hidden}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:26px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.78rem;color:var(--cinza-500)}
@media(max-width:920px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}}

/* ---------- animação de entrada ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .65s ease,transform .65s ease}
.reveal.on{opacity:1;transform:none}