/* ============================================================
   PLANALTO SUL ENGENHARIA — Design System
   Extraído do Portfólio Institucional (PS-2026)
   Paleta: azul-marinho #131f32 · dourado #b8863b · branco
   Tipografia: Poppins (títulos e texto) · mono (rótulos "//")
   ============================================================ */

:root {
  /* Cores da identidade (extraídas do PDF institucional) */
  --navy: #131f32;
  --navy-deep: #0d1726;
  --navy-panel: #1b2a44;
  --navy-soft: #4a6076;
  --gold: #b8863b;
  --gold-light: #cfa050;
  --white: #ffffff;
  --off-white: #f7f6f3;
  --gray-light: #dadce0;
  --gray-mid: #c9ced6;
  --slate: #4a5568;
  --text-on-dark: #c6ccd6;

  /* Tipografia */
  --font-sans: "Poppins", "Segoe UI", Arial, sans-serif;
  --font-mono: "Roboto Mono", "DejaVu Sans Mono", Consolas, monospace;

  /* Layout */
  --container: 1140px;
  --radius: 6px;
}

/* ---------- Reset básico ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--slate);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-light); }
h1, h2, h3, h4 { font-weight: 600; line-height: 1.25; color: var(--navy); margin: 0 0 .6em; }
p { margin: 0 0 1.1em; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Rótulo de seção estilo "// SEÇÃO" ---------- */
.section-label {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 1rem;
}

/* ---------- Linhas geométricas decorativas de canto ---------- */
.corners { position: relative; }
.corners::before, .corners::after {
  content: "";
  position: absolute;
  width: 56px; height: 56px;
  border: 2px solid var(--gold);
  pointer-events: none;
}
.corners::before { top: 24px; left: 24px; border-right: none; border-bottom: none; }
.corners::after { bottom: 24px; right: 24px; border-left: none; border-top: none; }

/* ---------- Botões ---------- */
.btn {
  display: inline-block;
  font-weight: 500;
  font-size: .95rem;
  letter-spacing: .04em;
  padding: 14px 32px;
  border: 2px solid var(--gold);
  border-radius: var(--radius);
  transition: background .2s, color .2s;
}
.btn-solid { background: var(--gold); color: var(--navy-deep); }
.btn-solid:hover { background: var(--gold-light); color: var(--navy-deep); }
.btn-outline { color: var(--white); }
.btn-outline:hover { background: var(--gold); color: var(--navy-deep); }
.btn-outline-dark { color: var(--navy); }
.btn-outline-dark:hover { background: var(--gold); color: var(--navy-deep); }

/* ---------- Cabeçalho ---------- */
.site-header {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}
.brand img { height: 46px; width: auto; }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a {
  color: var(--text-on-dark);
  font-size: .9rem;
  font-weight: 400;
  letter-spacing: .05em;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover { color: var(--white); }
.main-nav a.active { color: var(--white); border-bottom-color: var(--gold); }
.main-nav .nav-cta {
  border: 1.5px solid var(--gold);
  border-radius: var(--radius);
  padding: 9px 20px;
  color: var(--gold-light);
}
.main-nav .nav-cta:hover { background: var(--gold); color: var(--navy-deep); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--radius);
  color: var(--white);
  font-size: 1.4rem;
  line-height: 1;
  padding: 8px 12px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--navy) 55%, var(--navy-deep) 100%);
  color: var(--text-on-dark);
  overflow: hidden;
}
.hero .container {
  position: relative;
  padding-top: 110px;
  padding-bottom: 110px;
}
.hero-watermark {
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  height: 130%;
  opacity: .07;
  pointer-events: none;
}
.hero h1 {
  color: var(--white);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .02em;
  max-width: 21ch;
}
.hero h1 .gold { color: var(--gold-light); }
.hero-sub {
  font-family: var(--font-mono);
  font-size: .95rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin: 1.6rem 0 2.4rem;
}
.hero-sub .dot { color: var(--gold); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

/* Hero interno (páginas Sobre / Atuação / Contato) */
.page-hero {
  background: linear-gradient(160deg, var(--navy) 55%, var(--navy-deep) 100%);
}
.page-hero .container { position: relative; padding-top: 100px; padding-bottom: 84px; }
.page-hero h1 {
  color: var(--white);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 600;
  max-width: 24ch;
  margin-bottom: 0;
}
.page-hero p.lead {
  color: var(--text-on-dark);
  max-width: 54ch;
  margin: 1.2rem 0 0;
}

/* ---------- Seções ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--off-white); }
.section-dark { background: var(--navy); }
.section-dark h2, .section-dark h3 { color: var(--white); }
.section-dark p { color: var(--text-on-dark); }
.section h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  max-width: 22ch;
}
.section-intro { max-width: 62ch; }

/* ---------- Grade Sobre (texto + foto) ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 56px;
  align-items: center;
}
.about-photo {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(13, 23, 38, .25);
}

/* ---------- Estatísticas ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 3rem;
}
.stat {
  border-top: 3px solid var(--gold);
  background: var(--white);
  padding: 22px 24px;
  box-shadow: 0 8px 24px rgba(13, 23, 38, .06);
  border-radius: 0 0 var(--radius) var(--radius);
}
.section-dark .stat { background: var(--navy-panel); }
.stat .num {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
}
.section-dark .stat .num { color: var(--white); }
.stat .lbl {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ---------- Cards genéricos ---------- */
.cards {
  display: grid;
  gap: 24px;
  margin-top: 3rem;
}
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  padding: 30px 28px;
  position: relative;
}
.section-dark .card {
  background: var(--navy-panel);
  border-color: rgba(255, 255, 255, .08);
}
.card h3 { font-size: 1.15rem; margin-top: .4rem; }
.section-dark .card h3 { color: var(--white); }
.card p { font-size: .92rem; margin-bottom: 0; }
.card .card-num {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--gold);
  text-transform: uppercase;
}
/* Canto decorativo do card */
.card::after {
  content: "";
  position: absolute;
  top: 14px; right: 14px;
  width: 22px; height: 22px;
  border-top: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
  opacity: .55;
}

/* ---------- Lista de diferenciais ---------- */
.diff-list { margin-top: 3rem; display: grid; gap: 0; }
.diff-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--gray-light);
}
.diff-item:last-child { border-bottom: 1px solid var(--gray-light); }
.diff-item .diff-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}
.diff-item h3 { font-size: 1.1rem; margin-bottom: .3rem; }
.diff-item p { margin: 0; font-size: .95rem; }

/* ---------- Chips de disciplinas ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 2.2rem; }
.chip {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--white);
  background: var(--navy-panel);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 999px;
  padding: 9px 18px;
}
.chip::before { content: "— "; color: var(--gold); }

/* ---------- Responsável técnico ---------- */
.rt-card {
  margin-top: 3rem;
  background: var(--navy);
  color: var(--text-on-dark);
  border-radius: var(--radius);
  padding: 36px 40px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.rt-card .rt-name { color: var(--white); font-size: 1.3rem; font-weight: 600; margin: 0; }
.rt-card .rt-role { margin: 0; font-size: .95rem; }
.rt-card .rt-crea {
  font-family: var(--font-mono);
  color: var(--gold-light);
  font-size: .85rem;
  letter-spacing: .1em;
}
.rt-card .rt-divider {
  width: 3px; align-self: stretch;
  background: var(--gold);
  border-radius: 2px;
}

/* ---------- Faixa CTA ---------- */
.cta-band { background: var(--navy-deep); }
.cta-band .container {
  position: relative;
  padding-top: 72px;
  padding-bottom: 72px;
  text-align: center;
}
.cta-band h2 { color: var(--white); margin-left: auto; margin-right: auto; }
.cta-band p { color: var(--text-on-dark); max-width: 50ch; margin: 0 auto 2rem; }

/* ---------- Contato ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 3rem;
}
.contact-card {
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  padding: 26px 28px;
}
.contact-card .lbl {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: .4rem;
}
.contact-card .val { color: var(--navy); font-weight: 500; font-size: 1.02rem; }
.contact-card a.val:hover { color: var(--gold); }

/* ---------- Rodapé ---------- */
.site-footer {
  background: var(--navy-deep);
  color: var(--text-on-dark);
  padding: 64px 0 0;
  font-size: .9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-grid img { height: 120px; width: auto; margin-bottom: 1rem; }
.site-footer h4 {
  color: var(--white);
  font-size: .85rem;
  font-family: var(--font-mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 500;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .55rem; }
.site-footer a { color: var(--text-on-dark); }
.site-footer a:hover { color: var(--gold-light); }
.footer-tagline {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray-mid);
}
.footer-tagline .dot { color: var(--gold); }
.footer-note { font-size: .82rem; color: var(--navy-soft); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .8rem;
  color: var(--navy-soft);
}

/* ---------- Responsivo ---------- */
@media (max-width: 900px) {
  .cards-3, .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--navy-deep);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 28px;
    gap: 18px;
    border-bottom: 2px solid var(--gold);
  }
  .main-nav.open { display: flex; }
  .cards-3, .cards-4, .contact-grid, .stats { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero .container { padding-top: 72px; padding-bottom: 72px; }
  .corners::before, .corners::after { width: 34px; height: 34px; }
  .diff-item { grid-template-columns: 56px 1fr; gap: 14px; }
  .section { padding: 64px 0; }
}