/* ============================================================
   GSPAR — DESIGN SYSTEM v2 (Corporate Industrial)
   Referência: Atlas Copco / Caterpillar / Sandvik / Petrobras
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Serif:wght@400;500;600&display=swap');

:root {
  /* ============ CORES — paleta corporativa sóbria ============ */
  --navy-900: #061B33;        /* azul petroleiro profundo (Petrobras-style) */
  --navy-800: #0A2540;
  --navy-700: #133A5E;
  --navy-600: #1F4E7A;
  --navy-500: #2C6BA0;
  --navy-100: #E8EFF7;

  --orange: #E85D04;          /* laranja industrial (segurança), uso pontual */
  --orange-dark: #D24D00;

  --gray-900: #1A1D21;
  --gray-800: #2D3137;
  --gray-700: #4A5057;
  --gray-600: #6B7178;
  --gray-500: #8A9099;
  --gray-400: #B3B8BF;
  --gray-300: #D4D8DD;
  --gray-200: #E6E9ED;
  --gray-100: #F2F4F6;
  --gray-50:  #F8F9FA;
  --white:    #FFFFFF;

  /* ============ TIPOGRAFIA ============ */
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'IBM Plex Serif', Georgia, serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Escala fluida */
  --text-xs:   clamp(0.75rem,  0.72rem + 0.15vw, 0.85rem);
  --text-sm:   clamp(0.875rem, 0.84rem + 0.15vw, 0.95rem);
  --text-base: clamp(1rem,     0.96rem + 0.15vw, 1.075rem);
  --text-lg:   clamp(1.125rem, 1.07rem + 0.25vw, 1.25rem);
  --text-xl:   clamp(1.375rem, 1.28rem + 0.4vw,  1.625rem);
  --text-2xl:  clamp(1.75rem,  1.55rem + 0.8vw,  2.25rem);
  --text-3xl:  clamp(2.25rem,  1.9rem + 1.4vw,   3.25rem);
  --text-4xl:  clamp(2.75rem,  2.2rem + 2.2vw,   4.5rem);

  /* ============ ESPAÇAMENTO ============ */
  --s-1: 0.25rem; --s-2: 0.5rem; --s-3: 0.75rem; --s-4: 1rem;
  --s-6: 1.5rem; --s-8: 2rem; --s-12: 3rem; --s-16: 4rem;
  --s-20: 5rem; --s-24: 6rem; --s-32: 8rem;

  /* ============ LAYOUT ============ */
  --max-width: 1440px;
  --content-width: 1240px;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  /* ============ MOTION ============ */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --d-fast: 200ms;
  --d-base: 350ms;
  --d-slow: 600ms;
}

/* ============ RESET ============ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
  overflow-x: hidden;
}

img, picture, video, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font: inherit; }

::selection { background: var(--navy-800); color: var(--white); }

/* ============ TIPOGRAFIA — corporativa, séria ============ */
.display-1 {
  font-family: var(--font-sans);
  font-size: var(--text-4xl);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--gray-900);
}

.display-2 {
  font-family: var(--font-sans);
  font-size: var(--text-3xl);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--gray-900);
}

.display-3 {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.heading {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.eyebrow::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--orange);
}

.text-mono { font-family: var(--font-mono); }
.text-serif { font-family: var(--font-serif); }

/* ============ CONTAINER ============ */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container-wide {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ============ BOTÕES — corporativos ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.75rem;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.005em;
  border-radius: 2px;
  transition: all var(--d-base) var(--ease);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--navy-800);
  color: var(--white);
  border-color: var(--navy-800);
}

.btn-primary:hover {
  background: var(--navy-700);
  border-color: var(--navy-700);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -8px rgba(10, 37, 64, 0.4);
}

.btn-accent {
  background: var(--orange);
  color: var(--white);
  border-color: var(--orange);
}

.btn-accent:hover {
  background: var(--orange-dark);
  border-color: var(--orange-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -8px rgba(232, 93, 4, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--gray-900);
  border-color: var(--white);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-900);
  border-color: var(--gray-300);
}

.btn-ghost:hover {
  background: var(--gray-900);
  color: var(--white);
  border-color: var(--gray-900);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--navy-800);
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 2px solid var(--navy-800);
  padding-bottom: 0.25rem;
  transition: all var(--d-base) var(--ease);
}

.btn-link:hover {
  color: var(--orange);
  border-color: var(--orange);
  gap: 0.85rem;
}

.btn-link svg { transition: transform var(--d-base) var(--ease); }
.btn-link:hover svg { transform: translateX(4px); }

/* ============ ANIMAÇÕES ============ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }

.stagger > * {
  opacity: 0;
  transform: translateY(20px);
}

.stagger.visible > * {
  animation: staggerIn 700ms var(--ease-out) forwards;
}

.stagger.visible > *:nth-child(1) { animation-delay: 0ms; }
.stagger.visible > *:nth-child(2) { animation-delay: 80ms; }
.stagger.visible > *:nth-child(3) { animation-delay: 160ms; }
.stagger.visible > *:nth-child(4) { animation-delay: 240ms; }
.stagger.visible > *:nth-child(5) { animation-delay: 320ms; }
.stagger.visible > *:nth-child(6) { animation-delay: 400ms; }
.stagger.visible > *:nth-child(7) { animation-delay: 480ms; }
.stagger.visible > *:nth-child(8) { animation-delay: 560ms; }

@keyframes staggerIn {
  to { opacity: 1; transform: translateY(0); }
}

/* ============ HEADER ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--d-base) var(--ease);
  background: transparent;
}

.site-header.scrolled {
  background: rgba(6, 27, 51, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.8rem var(--gutter);
}

/* Header sempre escuro: logo e menu permanecem claros nos dois estados */
.site-header .logo,
.site-header .nav-link,
.site-header .lang-toggle {
  color: var(--white);
}

.site-header .lang-toggle {
  border-color: rgba(255,255,255,0.3);
}

.site-header .menu-toggle span {
  background: var(--white);
}

/* ============ NAV ============ */
.site-nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  position: relative;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-700);
  letter-spacing: 0.01em;
  padding: 0.25rem 0;
  transition: color var(--d-base) var(--ease);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 2px;
  background: var(--orange);
  transition: width var(--d-base) var(--ease);
}

.nav-link:hover,
.nav-link.active {
  color: var(--orange);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.site-header .nav-link:hover { color: var(--white); }
.site-header .nav-link.active { color: var(--white); }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: transparent;
  border: 1px solid var(--gray-300);
  border-radius: 999px;
  padding: 0.32rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--d-base) var(--ease);
}

.lang-toggle .lang { opacity: 0.45; transition: opacity var(--d-base) var(--ease); }
.lang-toggle .lang.active { opacity: 1; color: var(--orange); }
.lang-toggle .sep { opacity: 0.4; }

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-900);
  transition: transform var(--d-base) var(--ease), opacity var(--d-base) var(--ease);
}

.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--gray-900);
  transition: color var(--d-base) var(--ease);
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: var(--navy-800);
  color: var(--white);
  display: grid;
  place-items: center;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  border-radius: 2px;
  flex-shrink: 0;
}

.site-header.scrolled .logo-mark {
  background: var(--navy-800);
}

/* ============ LOGO IMAGE (PNG/SVG) ============ */
.logo-img {
  height: 40px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  display: none; /* aparece só quando JS confirma carregamento via .has-logo */
}

/* Quando a PNG carregou: esconde fallback e mostra a imagem */
.logo.has-logo .logo-fallback,
.logo.has-logo .logo-text { display: none !important; }

.logo.has-logo .logo-img { display: block; }

/* ============ FOOTER ============ */
.site-footer {
  background: var(--navy-900);
  color: var(--gray-300);
  padding: var(--s-20) 0 var(--s-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: var(--s-12);
}

.footer-brand .logo { color: var(--white); }

.footer-brand p {
  margin-top: 1.25rem;
  color: var(--gray-400);
  max-width: 32ch;
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 1.25rem;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.7rem; }

.footer-col a {
  color: var(--gray-400);
  font-size: 0.92rem;
  transition: color var(--d-fast) var(--ease);
}

.footer-col a:hover { color: var(--white); }

.footer-bottom {
  margin-top: var(--s-16);
  padding-top: var(--s-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* ============ FORM ============ */
.field { display: flex; flex-direction: column; gap: 0.4rem; }

.field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-600);
  font-weight: 500;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--gray-900);
  transition: all var(--d-fast) var(--ease);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--navy-800);
  box-shadow: 0 0 0 3px rgba(10, 37, 64, 0.08);
}

.field textarea { resize: vertical; min-height: 130px; }

/* ============ UTILITIES ============ */
.text-white { color: var(--white); }
.text-orange { color: var(--orange); }
.bg-navy { background: var(--navy-900); }
.bg-gray { background: var(--gray-50); }

.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;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--s-8); }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
}

@media (max-width: 768px) {
  .site-nav,
  .nav-cta .btn { display: none; }
  .menu-toggle { display: flex; }

  .site-nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: var(--white);
    z-index: 105;
    align-items: center;
    justify-content: center;
    gap: var(--s-6);
    padding: var(--s-16);
  }

  .site-nav.mobile-open .nav-link {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--gray-900);
  }
  .site-nav.mobile-open .nav-link.active { color: var(--orange); }
  .site-nav.mobile-open .nav-link::after { display: none; }
}

@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;
  }
}