* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #071a29;
  color: #ffffff;
}

/* TOPO DESKTOP (mesmo modelo aprovado) */

.topbar {
  display: flex;
  align-items: center;      /* centraliza logo + menu */
  justify-content: space-between;
  padding: 10px 40px;
}

.logo-img {
  height: 240px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
  text-transform: uppercase;
}

.main-nav a {
  color: #ced8e5;
  text-decoration: none;
}

.main-nav a.active,
.main-nav a:hover {
  color: #ffffff;
}

/* Botão de menu (mobile) – oculto no desktop */

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 26px;
  cursor: pointer;
}

/* HERO */

.hero {
  text-align: center;
  padding: 60px 20px 30px;
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-btn {
  display: inline-block;
  margin-top: 16px;
  padding: 12px 40px;
  background: #3579bd;
  border-radius: 8px;
  text-decoration: none;
  color: #ffffff;
}

/* CARDS */

.cards {
  max-width: 960px;
  margin: 40px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: #0b2436;
  border-radius: 12px;
  padding: 26px;
  text-align: center;
}

.card-icon {
  font-size: 32px;
  margin-bottom: 10px;
  color: #79b8ff;
}

/* PÁGINAS INTERNAS */

.page {
  max-width: 900px;
  margin: 60px auto 40px;
  padding: 0 24px;
  text-align: center;
}

.page h1 {
  font-size: 24px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* RODAPÉ */

.site-footer {
  text-align: center;
  padding: 20px;
  background: #051421;
  margin-top: 40px;
}

/* ======================= */
/* RESPONSIVO – TABLET     */
/* ======================= */

@media (max-width: 1024px) {
  .logo-img {
    height: 140px;
  }

  .topbar {
    padding: 8px 24px;
  }

  .hero-title {
    font-size: 32px;
    letter-spacing: 0.10em;
  }

  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ======================= */
/* RESPONSIVO – MOBILE     */
/* ======================= */

@media (max-width: 768px) {
  .topbar {
    padding: 8px 16px;
  }

  .logo-img {
    height: 90px;
  }

  .main-nav {
    display: none;                /* menu some; vira hambúrguer */
    flex-direction: column;
    gap: 12px;
    background: #051421;
    position: absolute;
    right: 0;
    top: 80px;
    padding: 16px 20px;
    border-radius: 0 0 0 16px;
    box-shadow: 0 12px 24px rgba(0,0,0,0.45);
  }

  .main-nav.show {
    display: flex;
  }

  .menu-toggle {
    display: block;
    margin-left: auto;
  }

  .hero {
    padding: 40px 16px 24px;
  }

  .hero-title {
    font-size: 24px;
    letter-spacing: 0.08em;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 22px 18px;
  }
}