/* ── Acessibilidade ─────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--navy);
  color: var(--white);
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 var(--r-md) var(--r-md);
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 9999;
  transition: top 0.2s;
  text-decoration: none;
}
.skip-link:focus {
  top: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 4px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .fade {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ── Reset & base ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

/* ── Design tokens ──────────────────────────────────────────────── */
:root {
  --navy:       #1A1A2E;
  --navy-mid:   #16213E;
  --navy-soft:  #1E2A45;
  --green:      #0F6E56;
  --green-2:    #1A9B76;
  --green-mist: #E1F5EE;
  --gray:       #5C5C6E;
  --gray-light: #F5F5F7;
  --gray-line:  rgba(26,26,46,0.08);
  --white:      #FFFFFF;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'DM Sans', sans-serif;

  --r-sm:  8px;
  --r-md:  14px;
  --r-lg:  20px;
  --r-full: 9999px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.08);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── Typography ─────────────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  color: var(--navy);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

/* ── Nav ────────────────────────────────────────────────────────── */
:root {
  --nav-height: 72px;
}
nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4rem;
  transition: background 0.3s, box-shadow 0.3s;
}
nav.scrolled {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--gray-line);
}
/* Nav sobre hero dark: links brancos, vira branco ao scrollar */
nav.nav-dark .nav-logo { color: var(--white); }
nav.nav-dark .nav-logo span { color: var(--green-2); }
nav.nav-dark .nav-center a { color: rgba(255,255,255,0.65); }
nav.nav-dark .nav-center a:hover { color: var(--white); }
nav.nav-dark .lang-toggle { background: rgba(255,255,255,0.1); }
nav.nav-dark .lang-btn { color: rgba(255,255,255,0.5); border-color: rgba(255,255,255,0.2); }
nav.nav-dark .lang-btn.active { color: var(--white); border-color: rgba(255,255,255,0.5); background: rgba(255,255,255,0.18); }
nav.nav-dark.scrolled .lang-toggle { background: var(--gray-light); }
nav.nav-dark.scrolled .nav-logo { color: var(--navy); }
nav.nav-dark.scrolled .nav-logo span { color: var(--green); }
nav.nav-dark.scrolled .nav-center a { color: var(--gray); }
nav.nav-dark.scrolled .nav-center a:hover { color: var(--navy); }
nav.nav-dark.scrolled .lang-btn { color: var(--gray); border-color: var(--gray-line); }
nav.nav-dark.scrolled .lang-btn.active { color: var(--navy); border-color: var(--navy); background: transparent; }
.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.04em;
  color: var(--navy);
}
.nav-logo span { color: var(--green); }
.nav-logo-light { color: var(--white); }
.nav-logo-light span { color: var(--green-2); }

.nav-center {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-center a {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color 0.2s;
}
.nav-center a:hover { color: var(--green); }

.nav-right { display: flex; align-items: center; gap: 1rem; }

/* Lang toggle */
.lang-toggle {
  display: flex;
  background: var(--gray-light);
  border-radius: var(--r-full);
  padding: 3px;
  gap: 2px;
}
.lang-btn {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--r-full);
  border: none;
  background: transparent;
  color: var(--gray);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.lang-btn.active {
  background: var(--navy);
  color: var(--white);
}

/* ── Buttons ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.8rem 1.6rem;
  min-height: 44px;
  border-radius: var(--r-full);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  white-space: nowrap;
}
.btn-primary { background: var(--green); color: var(--white); }
.btn-primary:hover { background: var(--green-2); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,110,86,0.25); }
.btn-outline { background: transparent; color: var(--navy); border: 1.5px solid var(--navy); }
.btn-outline:hover { background: var(--navy); color: var(--white); }
.about-left .btn-outline { color: var(--white); border-color: rgba(255,255,255,0.3); }
.about-left .btn-outline:hover { background: rgba(255,255,255,0.12); color: var(--white); }
.sobre-cta .btn-outline { color: var(--white); border-color: rgba(255,255,255,0.3); }
.sobre-cta .btn-outline:hover { background: rgba(255,255,255,0.12); color: var(--white); }
.btn-ghost { background: rgba(255,255,255,0.1); color: var(--white); border: 1px solid rgba(255,255,255,0.2); }
.btn-ghost:hover { background: rgba(255,255,255,0.18); }

/* ── Section chrome ─────────────────────────────────────────────── */
.sec { padding: 6rem 4rem; }
.sec-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.75rem;
}
.sec-title {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  color: var(--navy);
  margin-bottom: 1rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.sec-title-light { color: var(--white); }
.sec-desc {
  font-size: 1rem;
  color: var(--gray);
  line-height: 1.75;
  font-weight: 300;
  max-width: 520px;
}
.sec-desc-light { color: rgba(255,255,255,0.5); }

/* ── Fade animations ────────────────────────────────────────────── */
.fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}
.fade.visible { opacity: 1; transform: none; }

/* ── Pills / tags ───────────────────────────────────────────────── */
.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.8rem;
  border-radius: var(--r-full);
  background: var(--green-mist);
  color: var(--green);
}
.tag-amber {
  background: #FAEEDA;
  color: #854F0B;
}
.tag-blue {
  background: #E6F1FB;
  color: #185FA5;
}

/* Pilot badge */
.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: rgba(186,117,23,0.1);
  color: #854F0B;
  border: 1px solid rgba(186,117,23,0.2);
}
.badge-live-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #C4820A;
  animation: blink 1.6s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }

/* ── Case card (shared) ─────────────────────────────────────────── */
.case-card {
  display: block;
  background: var(--white);
  border: 1px solid var(--gray-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.case-card-body { padding: 1.75rem 2rem 2rem; }
.case-card-number {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 1rem;
}
.case-card-co {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 0.4rem;
}
.case-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}
.case-card-desc {
  font-size: 0.875rem;
  color: var(--gray);
  line-height: 1.65;
  font-weight: 300;
  margin-bottom: 1.25rem;
}
.case-card-metrics {
  display: flex;
  gap: 1.5rem;
  border-top: 1px solid var(--gray-line);
  padding-top: 1.25rem;
  margin-top: 1.25rem;
}
.case-metric-val {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--green);
  letter-spacing: -0.04em;
  line-height: 1;
}
.case-metric-label {
  font-size: 0.7rem;
  color: var(--gray);
  margin-top: 2px;
}
.case-card-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* ── Back link ──────────────────────────────────────────────────── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--gray);
  transition: color 0.2s;
  margin-bottom: 2.5rem;
}
.back-link:hover { color: var(--green); }

/* ── Desktop-note (hidden by default, shown via 1024px breakpoint) */
.desktop-note { display: none; }

/* ── Footer ─────────────────────────────────────────────────────── */
footer {
  background: var(--navy);
  padding: 2rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
footer p { font-size: 0.78rem; color: rgba(255,255,255,0.6); font-weight: 300; }
footer a { color: rgba(255,255,255,0.7); transition: color 0.2s; }
footer a:hover { color: var(--green-2); }

/* ── Touch targets ──────────────────────────────────────────────── */
.lang-btn { min-height: 44px; min-width: 44px; }

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 900px) {
  nav { padding: 1rem 1.5rem; }
  .nav-center { display: none; }
  .sec { padding: 4rem 1.5rem; }
}

/* ── Responsividade global ──────────────────────────────────────── */
@media (max-width: 900px) {
  .sec { padding: 4rem 2rem; }
  .about-sec { grid-template-columns: 1fr; }
  .about-left { padding: 4rem 2rem; }
  .about-right { padding: 4rem 2rem; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-featured { grid-template-columns: 1fr; }
  .case-featured-right { border-left: none; border-top: 1px solid rgba(255,255,255,0.06); }
  .process-layout { grid-template-columns: 1fr; gap: 3rem; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .contact-sec { padding: 5rem 2rem; }
  footer { padding: 2rem; flex-direction: column; gap: 0.75rem; text-align: center; align-items: center; }
}

@media (max-width: 600px) {
  .sec { padding: 3rem 1.25rem; }
  .sec-title { font-size: 1.75rem; }
  .hero-name { font-size: 2.8rem; }
  .cases-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .case-card-body { padding: 1.25rem; }
  .about-left { padding: 3rem 1.25rem; }
  .about-right { padding: 3rem 1.25rem; }
  .contact-title { font-size: 2rem; }
  .contact-links { flex-direction: column; align-items: center; }
  nav { padding: 1rem 1.25rem; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .skill-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .case-card-metrics { flex-wrap: wrap; gap: 1rem; }
}

/* ── Case nav mobile ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .case-back { min-height: 44px; margin-bottom: 2rem; }
  .cni { min-height: 44px; }
}

/* ── Lang toggle in case hero ───────────────────────────────────── */
.hero-lang {
  position: absolute;
  top: calc(var(--nav-height) + 1rem);
  right: 1rem;
  z-index: 3;
}
.hero-lang .lang-toggle { background: rgba(255,255,255,0.1); }
.hero-lang .lang-btn { color: rgba(255,255,255,0.5); border-color: rgba(255,255,255,0.2); min-height: 44px; min-width: 44px; }
.hero-lang .lang-btn.active { background: rgba(255,255,255,0.18); color: var(--white); border-color: rgba(255,255,255,0.5); }

/* ── Voltar ao topo ──────────────────────────────────────────────── */
.back-to-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 100;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--green); color: var(--white);
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out), visibility 0.25s, background 0.2s;
  box-shadow: 0 4px 16px rgba(15,110,86,0.35);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { background: var(--green-2); transform: translateY(-2px); }
.back-to-top:focus-visible { outline: 2px solid var(--green-2); outline-offset: 3px; }