/* ======= Reset e estilo base ======= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background-color: #f7f9fb;
  color: #333;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ======= Cabeçalho ======= */
header {
  background-color: #005f73;
  color: #fff;
  width: 100%;
  padding: 1.5rem 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

/* Botão menu para mobile */
.menu-btn {
  display: none;
  font-size: 2rem;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  margin-top: 0.5rem;
}

nav ul.menu {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

nav ul.menu li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1rem;
}

nav ul.menu li a:hover,
nav ul.menu li a:focus {
  color: #ffd166;
  outline: 2px solid #ffd166;
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .menu-btn {
    display: block;
  }

  nav ul.menu {
    display: none;
    flex-direction: column;
    width: 90%;
    margin: 0.5rem auto 0;
    background-color: #005f73;
    padding: 1rem;
    border-radius: 8px;
  }

  nav ul.menu.mostrar {
    display: flex;
  }
}

/* ======= Botões fixos de acessibilidade ======= */
.acessibilidade-fixa {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
}

.acessibilidade-fixa button {
  background-color: #0a9396;
  color: #fff;
  border: none;
  border-radius: 5px;
  padding: 0.6rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.3s ease;
}

.acessibilidade-fixa button:hover,
.acessibilidade-fixa button:focus {
  background-color: #005f73;
  outline: 2px solid #ffd166;
  outline-offset: 2px;
}

/* ======= Main e seções ======= */
main {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 2rem auto;
  padding: 2rem;
  background-color: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

section {
  margin-bottom: 2rem;
  width: 100%;
}

h2 {
  color: #005f73;
  margin-bottom: 1rem;
  border-bottom: 2px solid #0a9396;
  padding-bottom: 0.5rem;
  display: inline-block;
}

/* ======= Imagens ======= */
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1rem auto;
  border-radius: 10px;
}

/* ======= Cards de Projetos ======= */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  justify-items: center;
}

.card {
  background-color: #e0f2f1;
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  transition: transform 0.2s;
  width: 100%;
  max-width: 300px;
  text-align: center;
}

.card:hover,
.card:focus-within {
  transform: translateY(-5px);
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 0.8rem;
}

/* ======= Botões ======= */
a.btn,
button {
  display: inline-block;
  background-color: #0a9396;
  color: #fff;
  text-decoration: none;
  padding: 0.8rem 1.2rem;
  border-radius: 5px;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

a.btn:hover,
button:hover,
a.btn:focus,
button:focus {
  background-color: #005f73;
  outline: 2px solid #ffd166;
  outline-offset: 2px;
}

/* ======= Formulário ======= */
form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background-color: #f1f1f1;
  padding: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
}

fieldset {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  border: 1px solid #ccc;
  padding: 1rem;
  border-radius: 8px;
}

legend {
  font-weight: bold;
  color: #005f73;
}

label {
  font-weight: 600;
  text-align: left;
}

input {
  width: 100%;
  padding: 0.6rem;
  border-radius: 5px;
  border: 1px solid #ccc;
}

input:focus {
  outline: 2px solid #0a9396;
}

button[type="submit"] {
  padding: 0.8rem;
  width: 100%;
  background-color: #0a9396;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
}

button[type="submit"]:hover {
  background-color: #005f73;
}

/* ======= Rodapé ======= */
footer {
  background-color: #005f73;
  color: #fff;
  text-align: center;
  padding: 1rem 2rem;
  font-size: 0.9rem;
  width: 100%;
  max-width: 900px;
  margin-top: auto;
  border-radius: 0 0 10px 10px;
}

/* ======= Modo Escuro ======= */
body.modo-escuro {
  background-color: #121212;
  color: #e0e0e0;
}

body.modo-escuro header,
body.modo-escuro footer {
  background-color: #1b1b1b;
  color: #fff;
}

body.modo-escuro a,
body.modo-escuro button {
  background-color: #0a9396;
  color: #fff;
}

/* ======= Alto Contraste ======= */
body.alto-contraste {
  background-color: #000;
  color: #fff;
}

body.alto-contraste header,
body.alto-contraste footer {
  background-color: #000;
  color: #fff;
}

body.alto-contraste main,
body.alto-contraste section,
body.alto-contraste form,
body.alto-contraste fieldset {
  background-color: #000;
  color: #fff;
  border-color: #fff;
}

body.alto-contraste a,
body.alto-contraste button,
body.alto-contraste input {
  background-color: #fff;
  color: #000;
  border: 2px solid #fff;
}

body.alto-contraste h2 {
  color: #ffd166;
}

/* ======= Responsividade ======= */
@media (max-width: 768px) {
  main {
    padding: 1rem;
  }
  .cards {
    gap: 1rem;
  }
}