:root {
  --azul: #003366;
  --vermelho: #ff5959;
  --amarelo: #ffcd38;
  --branco: #ffffff;
  --cinza: #f7f7f7;
  --cinza-escuro: #555;
  --texto: #2a2a2a;
  --gradiente: linear-gradient(135deg, #003366, #ff5959);
  --sombra-header: rgba(0, 0, 0, 0.15);
  --duracao-transicao: 0.3s;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', sans-serif;
  background: var(--cinza);
  color: var(--texto);
  margin: 0;
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* HEADER */
header {
  position: sticky;
  top: 0;
  background: var(--azul);
  box-shadow: 0 0 0 0 transparent;
  transition: box-shadow var(--duracao-transicao) ease;
  z-index: 10000;
}

header.scrolled {
  box-shadow: 0 3px 12px var(--sombra-header);
}

.header-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: var(--branco);
  user-select: none;
}

.logo-img {
  height: 60px;
  width: auto;
  border-radius: 8px;
  transition: transform 0.3s ease;
}

.logo-img:hover {
  transform: scale(1.05);
}

.logo-text {
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.3px;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
  white-space: nowrap;
}

/* MENU */
.menu-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--branco);
  font-size: 1.9rem;
  cursor: pointer;
  padding: 8px 10px;
  transition: color 0.3s ease;
}

.menu-toggle:hover,
.menu-toggle:focus {
  color: var(--amarelo);
  outline: none;
}

.nav-menu {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100%;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: opacity var(--duracao-transicao) ease;
  opacity: 0;
  z-index: 9999;
}

.nav-menu.open {
  display: flex;
  opacity: 1;
}

.nav-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: center;
}

.nav-menu ul li {
  margin: 1rem 0;
}

.nav-menu ul li a {
  font-size: 1.8rem;
  color: var(--branco);
  text-decoration: none;
  font-weight: 700;
  padding: 10px 25px;
  border-radius: 40px;
  background: var(--azul);
  box-shadow: 0 3px 10px rgba(0,0,0,0.2);
  transition: background-color var(--duracao-transicao), color var(--duracao-transicao);
  user-select: none;
  display: inline-block;
}

.nav-menu ul li a:hover,
.nav-menu ul li a:focus,
.nav-menu ul li a.active {
  background: var(--amarelo);
  color: var(--azul);
  outline: none;
  box-shadow: 0 5px 15px rgba(255,205,56,0.7);
}

/* DESKTOP MENU */
@media(min-width: 768px) {
  .menu-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    display: flex !important;
    opacity: 1 !important;
    background: transparent;
    height: auto;
    flex-direction: row;
    justify-content: flex-end;
    align-items: center;
  }

  .nav-menu ul {
    display: flex;
    gap: 20px;
  }

  .nav-menu ul li {
    margin: 0;
  }

  .nav-menu ul li a {
    font-size: 1rem;
    background: none;
    color: var(--branco);
    padding: 8px 15px;
    box-shadow: none;
    transition: color 0.3s ease;
  }

  .nav-menu ul li a:hover,
  .nav-menu ul li a:focus,
  .nav-menu ul li a.active {
    background: var(--amarelo);
    color: var(--azul);
    box-shadow: 0 5px 15px rgba(255,205,56,0.7);
  }
}

/* MAIN SIMULADOR */
main {
  background: var(--branco);
  max-width: 600px;
  margin: 3.5rem auto 6rem;
  padding: 2.5rem 3rem;
  border-radius: 18px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  animation: fadeIn 0.8s ease forwards;
  user-select: none;
}

h1 {
  color: var(--azul);
  font-weight: 800;
  font-size: 2.25rem;
  margin-bottom: 2rem;
  text-align: center;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
}

/* FORMULÁRIO */
form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--azul);
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 2px solid var(--cinza);
  font-size: 1rem;
  transition: border-color 0.35s ease, box-shadow 0.35s ease;
  outline-offset: 2px;
  outline: none;
  font-family: inherit;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--amarelo);
  box-shadow: 0 0 12px var(--amarelo);
}

/* PLACEHOLDER */
input::placeholder,
select::-ms-expand {
  font-style: italic;
  color: #999;
}

/* BOTÃO */
button.btn {
  background: var(--amarelo);
  color: var(--azul);
  font-weight: 700;
  border: none;
  padding: 16px 48px;
  border-radius: 32px;
  font-size: 1.3rem;
  cursor: pointer;
  margin-top: 2.5rem;
  display: block;
  width: 100%;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 5px 14px rgba(255, 205, 56, 0.6);
  transition: background-color 0.3s ease, transform 0.25s ease;
  user-select: none;
}

button.btn:hover,
button.btn:focus {
  background: var(--vermelho);
  color: var(--branco);
  transform: scale(1.06);
  outline: none;
  box-shadow: 0 8px 20px rgba(255, 89, 89, 0.8);
}

/* RESULTADO */
#resultado {
  margin-top: 3rem;
  padding: 24px 28px;
  border-radius: 18px;
  font-weight: 700;
  font-size: 1.3rem;
  text-align: center;
  user-select: none;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
  min-height: 70px;
  border: 2px solid transparent;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

#resultado.aprovado {
  background: #d4edda;
  color: #155724;
  border-color: #c3e6cb;
}

#resultado.reprovado {
  background: #f8d7da;
  color: #721c24;
  border-color: #f5c6cb;
}

/* ÍCONES no resultado */
#resultado.aprovado::before,
#resultado.reprovado::before {
  content: '';
  display: inline-block;
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1;
  vertical-align: middle;
  user-select: none;
}

#resultado.aprovado::before {
  content: "✓";
  margin-right: 8px;
  color: #155724;
}

#resultado.reprovado::before {
  content: "✗";
  margin-right: 8px;
  color: #721c24;
}

/* VOLTAR AO TOPO */
#voltarTopo {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--vermelho);
  color: var(--branco);
  border: none;
  padding: 14px 18px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: none;
  box-shadow: 0 6px 18px rgba(255,89,89,0.8);
  transition: opacity 0.4s ease, transform 0.3s ease;
  z-index: 1000;
  user-select: none;
}

#voltarTopo.show {
  display: block;
  opacity: 1;
}

#voltarTopo:hover,
#voltarTopo:focus {
  background: var(--amarelo);
  color: var(--azul);
  transform: scale(1.15);
  outline: none;
}

/* TOOLTIP VOLTAR AO TOPO */
#voltarTopo[aria-label]:hover::after {
  content: attr(aria-label);
  position: absolute;
  bottom: 60px;
  right: 50%;
  transform: translateX(50%);
  background: var(--azul);
  color: var(--branco);
  font-size: 0.85rem;
  padding: 5px 12px;
  border-radius: 12px;
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 3px 8px rgba(0,0,0,0.3);
  user-select: none;
}

/* WHATSAPP FLOAT */
.whatsapp-float {
  position: fixed;
  bottom: 90px;
  right: 30px;
  background-color: #25D366;
  border-radius: 50%;
  padding: 12px;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
  cursor: pointer;
  transition: box-shadow 0.4s ease, transform 0.4s ease;
  z-index: 1000;
  user-select: none;
}

.whatsapp-float:hover,
.whatsapp-float:focus {
  box-shadow: 0 10px 30px rgba(37, 211, 102, 0.9);
  transform: scale(1.12);
  outline: none;
}

/* PULSO SUTIL */
@keyframes pulse {
  0% {
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
  }
  50% {
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.9);
  }
  100% {
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
  }
}

.whatsapp-float {
  animation: pulse 3s ease-in-out infinite;
}

.whatsapp-float img {
  height: 40px;
  width: 40px;
  display: block;
  border-radius: 50%;
}

/* ANIMAÇÃO DE APARECER */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(25px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* MEDIA QUERIES */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .header-container {
    padding: 0 15px;
  }

  main {
    margin: 2rem 1rem 4rem;
    padding: 2rem;
  }

  button.btn {
    padding: 14px 36px;
    font-size: 1.1rem;
    max-width: 100%;
  }
}