/* OSA — One Step Ahead · site pages
   Brandbook v2.0: Preto #111111, Osso #F4F2ED, Oliva #6F7357, Cinza #64645F, Areia #DDD9CF.
   Type: Nimbus Sans (Helvetica family). Bold titles, regular text. */

:root {
  --preto: #111111;
  --osso: #F4F2ED;
  --oliva: #6F7357;
  --cinza: #64645F;
  --areia: #DDD9CF;
  --branco: #FFFFFF;
  --line: rgba(244, 242, 237, 0.14);
  --font: "Nimbus Sans", "Nimbus Sans L", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --max: 1200px;
  --gutter: clamp(16px, 4vw, 48px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--preto);
  color: var(--osso);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; }

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

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(17, 17, 17, 0.92);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.brand-link img { height: 26px; width: auto; }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a {
  text-decoration: none; font-size: 13px; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: rgba(244, 242, 237, 0.72); padding: 6px 0;
  border-bottom: 2px solid transparent; transition: color .2s, border-color .2s;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--osso); border-bottom-color: var(--oliva); }
.nav .btn { border-bottom: 0; }
.nav-toggle { display: none; background: none; border: 0; color: var(--osso); font: inherit; font-weight: 700; letter-spacing: .12em; font-size: 13px; text-transform: uppercase; cursor: pointer; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: flex-start;
    gap: 0; background: var(--preto); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 20px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav .btn { margin-top: 16px; width: auto; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  font-weight: 700; font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 14px 24px; border: 1px solid var(--osso); color: var(--preto); background: var(--osso);
  transition: background .2s, color .2s;
}
.btn:hover { background: transparent; color: var(--osso); }
.btn.ghost { background: transparent; color: var(--osso); }
.btn.ghost:hover { background: var(--osso); color: var(--preto); }
.btn .arrow { display: inline-block; transition: transform .2s; }
.btn:hover .arrow { transform: translateX(4px); }
.on-light .btn { background: var(--preto); color: var(--osso); border-color: var(--preto); }
.on-light .btn:hover { background: transparent; color: var(--preto); }

/* ---------- hero ---------- */
.hero { position: relative; min-height: min(88vh, 820px); display: flex; align-items: flex-end; overflow: hidden; }
.hero .bg { position: absolute; inset: 0; }
.hero .bg img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.06); animation: drift 18s ease-out forwards; }
.hero .bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(17,17,17,.35) 0%, rgba(17,17,17,.55) 45%, var(--preto) 100%); }
.hero .wrap { position: relative; padding-top: 140px; padding-bottom: clamp(56px, 9vw, 110px); width: 100%; }
@keyframes drift { to { transform: scale(1); } }
@media (prefers-reduced-motion: reduce) { .hero .bg img { animation: none; transform: none; } html { scroll-behavior: auto; } }

.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase; color: var(--areia); display: flex; align-items: center; gap: 14px; }
.eyebrow::before { content: ""; width: 40px; height: 2px; background: var(--oliva); }
h1, h2, h3 { font-weight: 700; line-height: 1.05; letter-spacing: -0.02em; }
h1 { font-size: clamp(42px, 7.2vw, 96px); margin: 22px 0 22px; max-width: 14ch; }
h2 { font-size: clamp(32px, 4.6vw, 60px); max-width: 18ch; }
h3 { font-size: clamp(20px, 1.8vw, 24px); letter-spacing: -0.01em; line-height: 1.2; }
.lead { font-size: clamp(18px, 1.6vw, 22px); line-height: 1.5; max-width: 46ch; color: rgba(244,242,237,.86); }
.hero .actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

/* ---------- sections ---------- */
section { padding: clamp(72px, 10vw, 140px) 0; }
.on-light { background: var(--osso); color: var(--preto); }
.on-light .eyebrow { color: var(--cinza); }
.on-light .lead, .on-light p { color: #2a2a28; }
.section-head { display: grid; gap: 22px; margin-bottom: clamp(40px, 6vw, 72px); }
.section-head p { max-width: 58ch; }
.muted { color: rgba(244,242,237,.66); }
.on-light .muted { color: var(--cinza); }

/* progress line (brandbook: linhas de progresso) */
.progress { height: 2px; background: var(--line); position: relative; margin: 0 0 clamp(40px, 6vw, 64px); }
.progress::after { content: ""; position: absolute; left: 0; top: 0; height: 100%; width: var(--p, 35%); background: var(--oliva); }
.on-light .progress { background: rgba(17,17,17,.12); }

/* grids */
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.on-light .grid { background: rgba(17,17,17,.12); border-color: rgba(17,17,17,.12); }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.g5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 1000px) { .g4, .g5 { grid-template-columns: repeat(2, 1fr); } .g3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .g2, .g3, .g4, .g5 { grid-template-columns: 1fr; } }

.card { background: var(--preto); padding: clamp(24px, 3vw, 40px); display: flex; flex-direction: column; gap: 14px; min-height: 100%; }
.on-light .card { background: var(--osso); }
.card .num { font-size: 13px; font-weight: 700; letter-spacing: .18em; color: var(--oliva); }
.card p { font-size: 16px; color: rgba(244,242,237,.74); }
.on-light .card p { color: #3a3a37; }
.card .tag { font-size: 11px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--areia); }
.on-light .card .tag { color: var(--cinza); }

/* avenue cards (institutional) */
.avenue { text-decoration: none; position: relative; transition: background .25s; }
.avenue:hover { background: #1a1a19; }
.avenue .go { margin-top: auto; font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; display: flex; gap: 10px; align-items: center; padding-top: 18px; }
.avenue .go span { transition: transform .2s; }
.avenue:hover .go span { transform: translateX(6px); }
.avenue h3 { font-size: clamp(24px, 2.4vw, 32px); }

/* steps */
.steps { display: grid; grid-template-columns: repeat(8, 1fr); gap: 0; counter-reset: s; border-top: 2px solid var(--oliva); }
.steps li { list-style: none; padding: 22px 14px 0 0; position: relative; }
.steps li::before { content: ""; position: absolute; top: -7px; left: 0; width: 12px; height: 12px; background: var(--oliva); border-radius: 50%; }
.steps .n { font-size: 12px; font-weight: 700; letter-spacing: .16em; color: var(--oliva); }
.steps .t { font-size: 15px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-top: 6px; display: block; }
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(4, 1fr); row-gap: 36px; } }
@media (max-width: 560px) { .steps { grid-template-columns: repeat(2, 1fr); } }

/* chain (problem) */
.chain { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.chain div { border-top: 2px solid var(--cinza); padding-top: 16px; font-weight: 700; font-size: 17px; line-height: 1.3; }
.chain div span { display: block; font-size: 12px; letter-spacing: .16em; color: var(--oliva); margin-bottom: 8px; }
.chain div:last-child { border-top-color: var(--oliva); }
@media (max-width: 800px) { .chain { grid-template-columns: 1fr 1fr; } }

/* split media */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.split .media { aspect-ratio: 4 / 5; overflow: hidden; }
.split .media img { width: 100%; height: 100%; object-fit: cover; }
.split.reverse .media { order: 2; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } .split.reverse .media { order: 0; } .split .media { aspect-ratio: 16 / 10; } }

/* list with ticks */
.ticks { list-style: none; display: grid; gap: 14px; margin-top: 28px; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .72em; width: 14px; height: 2px; background: var(--oliva); }

/* quote */
.quote { font-size: clamp(26px, 3.4vw, 44px); font-weight: 700; line-height: 1.2; max-width: 24ch; letter-spacing: -0.015em; }
.quote::before { content: ""; display: block; width: 56px; height: 3px; background: var(--oliva); margin-bottom: 28px; }

/* digital mock */
.mock { background: #191918; border: 1px solid var(--line); padding: clamp(20px, 3vw, 32px); font-size: 14px; }
.mock-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--line); margin-bottom: 18px; gap: 12px; flex-wrap: wrap; }
.mock-head strong { font-size: 15px; letter-spacing: .04em; }
.pill { font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; padding: 5px 10px; border: 1px solid var(--oliva); color: var(--areia); }
.pill.ok { background: var(--oliva); color: var(--osso); }
.row { display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 12px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
.row:last-child { border-bottom: 0; }
.bar { height: 6px; background: rgba(244,242,237,.1); position: relative; }
.bar i { position: absolute; inset: 0 auto 0 0; background: var(--oliva); width: var(--w); }
.mock-note { margin-top: 14px; font-size: 12px; color: var(--cinza); }
@media (max-width: 560px) { .row { grid-template-columns: 1fr auto; } .row .bar { grid-column: 1 / -1; order: 3; } }

/* CTA band */
.cta { text-align: left; }
.cta .wrap { display: grid; grid-template-columns: 1.4fr auto; gap: 32px; align-items: end; }
@media (max-width: 760px) { .cta .wrap { grid-template-columns: 1fr; } }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 64px 0 40px; }
.site-footer .top { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: start; }
.site-footer .logo img { height: 96px; width: auto; }
.site-footer .sign { font-size: clamp(22px, 2.4vw, 30px); font-weight: 700; margin-top: 28px; }
.site-footer .sub { color: rgba(244,242,237,.62); margin-top: 6px; }
.site-footer nav { display: grid; gap: 10px; text-align: right; }
.site-footer nav a { text-decoration: none; font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: rgba(244,242,237,.72); }
.site-footer nav a:hover { color: var(--osso); }
.site-footer .bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 13px; color: var(--cinza); letter-spacing: .06em; }
@media (max-width: 700px) { .site-footer .top { grid-template-columns: 1fr; } .site-footer nav { text-align: left; } }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }
.no-js .reveal { opacity: 1; transform: none; }