/* =========================================================
   Três Fronteiras — site institucional
   Paleta da marca: teal #178282 · laranja #E8672A · ouro #EFA820
   ========================================================= */

:root {
  --teal: #178282;
  --teal-dark: #0B4444;
  --teal-light: #EAF4F4;
  --orange: #E8672A;
  --orange-dark: #C04E18;
  --gold: #EFA820;
  --cream: #F7FAFA;
  --ink: #1A3030;
  --muted: #5C8080;
  --border: #C4D8D8;
  --white: #ffffff;

  --font-display: 'Syne', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SF Mono', monospace;

  --maxw: 1200px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; }

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--orange);
}
.eyebrow.center { justify-content: center; }

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

/* ---------- Header / nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__logo img { height: 40px; width: auto; }
.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}
.nav__links a:hover { color: var(--teal); }
.nav__cta {
  font-family: var(--font-mono) !important;
  font-size: 12px;
  color: var(--white) !important;
  background: var(--orange);
  padding: 8px 18px;
  letter-spacing: 0.05em;
}
.nav__cta:hover { background: var(--orange-dark); color: var(--white) !important; }
.nav__toggle { display: none; background: none; border: 0; cursor: pointer; font-size: 24px; color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  background: var(--teal-dark);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.hero__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(48px, 8vw, 88px) var(--gutter);
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}
.hero .eyebrow { color: var(--gold); }
.hero .eyebrow::before { background: var(--gold); }
.hero__stat {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: clamp(72px, 12vw, 132px);
  line-height: 0.85;
  letter-spacing: -0.02em;
  margin-top: 28px;
}
.hero__stat span { color: var(--gold); font-size: 0.5em; }
.hero__statlabel {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 10px;
}
.hero__headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.15;
  margin: 32px 0;
  max-width: 18ch;
}
.hero__actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.hero__media {
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  aspect-ratio: 4 / 3;
  background: rgba(255, 255, 255, 0.04);
}
.hero__media img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 13px 24px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn--primary { background: var(--orange); color: var(--white); }
.btn--primary:hover { background: var(--orange-dark); }
.btn--ghost-light {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.55);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.2);
}
.btn--ghost-light:hover { color: var(--white); border-color: rgba(255, 255, 255, 0.5); }
.btn--gold-outline {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
  border-color: rgba(239, 168, 32, 0.5);
  background: transparent;
}
.btn--gold-outline:hover { background: rgba(239, 168, 32, 0.12); }

/* ---------- Section scaffolding ---------- */
.section { padding: clamp(48px, 8vw, 88px) 0; }
.section__head { margin-bottom: clamp(32px, 5vw, 48px); max-width: 540px; }
.section__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.1;
  margin-top: 12px;
  color: var(--ink);
}

/* ---------- Produtos ---------- */
.products { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; }
.card {
  padding: clamp(28px, 4vw, 40px);
  border-top: 3px solid var(--orange);
}
.card--light { background: var(--teal-light); }
.card--dark { background: var(--teal-dark); color: var(--white); border-top-color: var(--gold); }
.card__kicker {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}
.card--dark .card__kicker { color: var(--gold); }
.card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  margin: 10px 0 4px;
}
.card__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 16px;
}
.card--dark .card__sub { color: rgba(255, 255, 255, 0.4); }
.card__text { font-size: 15px; color: var(--muted); margin-bottom: 24px; }
.card--dark .card__text { color: rgba(255, 255, 255, 0.55); }
.card__img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  margin-bottom: 24px;
  border: 1px solid var(--border);
}
.card--dark .card__img { border-color: rgba(255, 255, 255, 0.1); }
.card__img img { width: 100%; height: 100%; object-fit: cover; }

.spec { border-top: 1px solid var(--border); }
.spec__row {
  display: flex;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.spec__row span:first-child { color: var(--muted); }
.spec__row span:last-child { font-family: var(--font-mono); color: var(--ink); }
.card--dark .spec, .card--dark .spec__row { border-color: rgba(255, 255, 255, 0.1); }
.card--dark .spec__row span:first-child { color: rgba(255, 255, 255, 0.4); }
.card--dark .spec__row span:last-child { color: var(--white); }
.card__note {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 16px;
  margin-bottom: 20px;
}

/* ---------- Empresa ---------- */
.empresa { background: var(--white); }
.empresa__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}
.empresa__img { border: 1px solid var(--border); overflow: hidden; aspect-ratio: 4 / 3; }
.empresa__img img { width: 100%; height: 100%; object-fit: cover; }
.empresa p { color: var(--muted); margin-bottom: 14px; max-width: 46ch; }
.factstrip { display: flex; gap: 24px; flex-wrap: wrap; margin-top: 24px; }
.fact { border-left: 3px solid var(--orange); padding-left: 12px; }
.fact:nth-child(2) { border-left-color: var(--teal); }
.fact__label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 3px;
}
.fact strong { font-weight: 600; font-size: 14px; color: var(--ink); display: block; }
.fact small { font-size: 12px; color: var(--muted); }

/* ---------- Vídeo ---------- */
.videoblock { background: var(--teal-dark); }
.videoblock__inner { max-width: var(--maxw); margin: 0 auto; padding: clamp(48px, 7vw, 80px) var(--gutter); }
.videoblock .eyebrow { color: var(--gold); }
.videoblock .eyebrow::before { background: var(--gold); }
.videoblock h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 32px);
  color: var(--white);
  margin: 12px 0 28px;
  max-width: 16ch;
}
.videoblock__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #000;
}
.videoblock__frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- Clientes ---------- */
.clientes { background: var(--teal); padding: clamp(36px, 5vw, 52px) 0; }
.clientes__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
  margin-bottom: 26px;
}
.clientes__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  max-width: 620px;
  margin: 0 auto;
}
.cliente {
  background: rgba(255, 255, 255, 0.1);
  padding: 22px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.cliente__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--white);
}
.cliente__brand {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* ---------- Certificações ---------- */
.cert { background: var(--teal-light); }
.cert__grid { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 24px; }
.cert__item {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 18px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1 1 260px;
}
.cert__icon {
  width: 38px; height: 38px;
  background: var(--teal-dark);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--gold);
  font-size: 18px;
}
.cert__label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 3px;
}
.cert__value { font-family: var(--font-display); font-weight: 700; font-size: 20px; color: var(--ink); }
.cert__sub { font-size: 11px; color: var(--muted); }

/* ---------- Contato ---------- */
.contato__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: start;
}
.contato p { color: var(--muted); margin: 14px 0 28px; max-width: 42ch; }
.contato__info { display: flex; flex-direction: column; gap: 16px; }
.contato__row { display: flex; gap: 12px; align-items: flex-start; }
.contato__row .ti { color: var(--teal); font-size: 17px; width: 20px; flex-shrink: 0; margin-top: 2px; }
.contato__row strong { font-weight: 500; color: var(--ink); display: block; }
.contato__row small { color: var(--muted); font-size: 12px; }

.form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}
.field input, .field select, .field textarea {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 11px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ink);
  border-radius: 0;
  width: 100%;
  transition: border-color 0.15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--teal);
}
.field textarea { min-height: 96px; resize: vertical; }

/* ---------- Footer ---------- */
.footer { background: var(--teal-dark); color: rgba(255, 255, 255, 0.6); }
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer__logo {
  background: var(--white);
  padding: 8px 14px;
  border-radius: 4px;
  display: inline-flex;
}
.footer__logo img { height: 28px; width: auto; }
.footer__meta { display: flex; gap: 20px; flex-wrap: wrap; }
.footer__meta span { font-family: var(--font-mono); font-size: 11px; color: rgba(255, 255, 255, 0.35); }

/* ---------- Responsivo ---------- */
@media (max-width: 860px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__media { order: -1; }
  .products { grid-template-columns: 1fr; }
  .empresa__grid, .contato__grid { grid-template-columns: 1fr; }
  .empresa__img { order: -1; }
  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    background: var(--white);
    padding: 20px var(--gutter);
    border-bottom: 1px solid var(--border);
  }
  .nav__toggle { display: block; }
  .clientes__grid { grid-template-columns: 1fr; max-width: 320px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}