:root {
  --black: #000;
  --azul-principal: #0d6efd;
  --azul-escuro: #0a3d62;
  --azul-claro: #e7f1ff;
  --cinza-texto: #343a40;
  --branco: #ffffff;
}

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

body {
  font-family: Arial, sans-serif;
  color: var(--cinza-texto);
  line-height: 1.7;
}

.navbar {
  background-color: var(--azul-principal) !important;
}

.nav-link {
  color: var(--branco) !important;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--azul-claro) !important;
}

.section {
  padding: 100px 0;
}

.logo-si {
  height: 70px;
}

#home {
  background: var(--azul-escuro);
  padding: 100px 0;
}

#sobre {
  background: var(--black);
  color: var(--branco);
}

#perfis {
  background: var(--azul-escuro);
  color: var(--branco);
}

#galeria {
  background: var(--black);
  color: var(--branco);
}

h2 {
  font-weight: bold;
}

.carousel {
  max-width: 1100px;
  margin: auto;
  margin-top: 6.5em;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
}

/* imagem enquadrada */
.carousel-img {
  height: 480px;
  object-fit: cover;
}

/* texto do banner */
.carousel-caption {
  background: rgba(0, 0, 0, 0.55);
  border-radius: 15px;
  padding: 25px;
}

/* mobile */
@media (max-width: 768px) {
  .carousel-img {
    height: 300px;
  }

  .carousel-caption h1 {
    font-size: 1.4em;
  }

  .carousel-caption p {
    font-size: 0.9em;
  }

  #home {
    padding: 200px 0;
  }
}

/*SOBRE A TURMA*/

.sobre-turma {
  max-width: 900px; /* largura confortável de leitura */
  margin: auto;
}

.sobre-turma p {
  text-align: justify;
  line-height: 1.8;
  margin-bottom: 1.2em; /* espaçamento entre linhas */
  font-size: 1.05em;
}

/* mobile */
@media (max-width: 768px) {
  .sobre-turma {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

.profile-img {
  width: 130px;
  height: 130px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--azul-principal);
  margin: 0 auto;
}

.card {
  border: none;
  border-radius: 15px;
  transition: 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.card h5 {
  color: var(--azul-escuro);
  font-weight: 600;
}

/* botão personalizado */
.btn-primary {
  background-color: var(--azul-principal);
  border: none;
}

.btn-primary:hover {
  background-color: var(--azul-escuro);
}

/*GALERIA*/

#galeria .carousel {
  max-width: 1100px;
  margin: auto;
}

.gallery-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 15px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
  transition: 0.3s;
}

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

/* MOBILE */
@media (max-width: 768px) {
  .gallery-img {
    height: 160px;
  }
}

/*FOOTER */
.footer {
  background-color: var(--azul-principal);
  color: var(--branco);
  padding: 40px 20px;
}

.footer-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--azul-claro);
  margin-bottom: 5px;
}

.footer-subtitle {
  font-size: 0.95rem;
  opacity: 0.9;
  margin-bottom: 15px;
}

.footer-author {
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.footer-copy {
  font-size: 0.85rem;
  opacity: 0.8;
}