/**
 * Estilos avançados para o cabeçalho do blog
 * Implementa cabeçalho flutuante e com mudança de cor ao rolar
 */

/* Configurações Iniciais */
:root {
  --header-height: 80px;
  --header-transition: all 0.4s ease;
  --header-bg-transparent: rgba(0, 0, 0, 0);
  --header-bg-solid: rgba(255, 255, 255, 0.95);
  --header-bg-dark: rgba(25, 15, 45, 0.95);
  --header-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  --text-color-light: #fff;
  --text-color-dark: #121420;
  --primary-color: #7c4dff;
  --secondary-color: #4a2eb3;
  --accent-color: #10b981;
  --logo-scale: 1.05;
  --animation-speed: 0.4s;
  --gradient-dark: linear-gradient(135deg, rgba(25, 15, 45, 0.95) 0%, rgba(70, 40, 120, 0.95) 100%);
  --glow-shadow: 0 0 20px rgba(124, 77, 255, 0.5);
}

/* Aplicar estilos ao cabeçalho principal quando tem a classe blog-header */
#main-header.blog-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--header-transition);
  padding: 15px 0;
  background-color: transparent;
  border-bottom: none;
}

/* Ajuste para o conteúdo da página não ficar abaixo do cabeçalho fixo */
body {
  padding-top: var(--header-height);
}

/* Estado do cabeçalho ao rolar */
#main-header.blog-header.scrolled {
  background-color: var(--header-bg-solid);
  box-shadow: var(--header-shadow);
  padding: 10px 0;
  border-bottom: 1px solid rgba(140, 95, 255, 0.3);
}

/* Versão escura do cabeçalho ao rolar */
#main-header.blog-header.scrolled.dark-header {
  background: var(--gradient-dark);
  box-shadow: var(--header-shadow), var(--glow-shadow);
  border-bottom: 1px solid rgba(140, 95, 255, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: headerGlow 4s infinite alternate;
  transform: translateY(-5px);
  margin-top: 5px;
}

/* Efeito de brilho na borda inferior */
@keyframes headerGlow {
  0% {
    border-bottom-color: rgba(140, 95, 255, 0.4);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
  }
  50% {
    border-bottom-color: rgba(179, 136, 255, 0.6);
    box-shadow: 0 8px 30px rgba(140, 95, 255, 0.3);
  }
  100% {
    border-bottom-color: rgba(124, 77, 255, 0.7);
    box-shadow: 0 10px 35px rgba(124, 77, 255, 0.4);
  }
}

/* Logo */
#main-header.blog-header .navbar-brand {
  display: inline-block;
  transition: transform var(--animation-speed) ease;
}

#main-header.blog-header .navbar-brand:hover {
  transform: scale(var(--logo-scale));
}

#main-header.blog-header .logo-image {
  height: 50px;
  width: auto;
  transition: var(--header-transition);
  filter: drop-shadow(0 0 5px rgba(140, 95, 255, 0.3));
}

#main-header.blog-header.scrolled .logo-image {
  height: 40px;
  filter: drop-shadow(0 0 8px rgba(140, 95, 255, 0.5));
}

/* Menu de navegação */
#main-header.blog-header .nav-link {
  color: var(--text-color-light);
  font-weight: 500;
  margin: 0 8px;
  padding: 8px 12px;
  border-radius: 6px;
  transition: var(--header-transition);
  position: relative;
}

/* Cores do menu em diferentes estados do cabeçalho */
#main-header.blog-header.scrolled .nav-link {
  color: var(--text-color-dark);
}

#main-header.blog-header.scrolled.dark-header .nav-link {
  color: var(--text-color-light);
  text-shadow: 0 0 10px rgba(124, 77, 255, 0.3);
}

/* Efeito hover nos links do menu */
#main-header.blog-header .nav-link:hover {
  color: var(--primary-color);
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-3px);
}

#main-header.blog-header.scrolled .nav-link:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

#main-header.blog-header.scrolled.dark-header .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Link ativo */
#main-header.blog-header .nav-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

#main-header.blog-header .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 10px;
  transition: width var(--animation-speed) ease;
  box-shadow: 0 0 10px rgba(124, 77, 255, 0.5);
}

#main-header.blog-header .nav-link.active:hover::after {
  width: 40px;
}

#main-header.blog-header.scrolled.dark-header .nav-link.active {
  color: #fff;
  text-shadow: 0 0 15px rgba(140, 95, 255, 0.8);
}

/* Botão CTA */
#main-header.blog-header .btn-primary {
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(124, 77, 255, 0.3);
  border: none;
}

#main-header.blog-header .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(124, 77, 255, 0.5);
}

/* Ajustes para o botão hamburguer no mobile */
#main-header.blog-header .navbar-toggler {
  border: none;
  padding: 0.5rem;
  transition: var(--header-transition);
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

#main-header.blog-header.scrolled .navbar-toggler {
  background-color: rgba(0, 0, 0, 0.05);
}

#main-header.blog-header.scrolled.dark-header .navbar-toggler {
  background-color: rgba(255, 255, 255, 0.1);
}

#main-header.blog-header .navbar-toggler:focus {
  box-shadow: none;
  outline: none;
}

/* Versão responsiva */
@media (max-width: 991.98px) {
  #main-header.blog-header .navbar-collapse {
    background-color: rgba(25, 15, 45, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin: 0 -12px;
    padding: 20px;
    border-radius: 0 0 15px 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-top: 1px solid rgba(140, 95, 255, 0.3);
    margin-top: 10px;
  }
  
  #main-header.blog-header .navbar-collapse .nav-link {
    text-align: center;
    margin: 8px 0;
  }
  
  #main-header.blog-header .navbar-toggler-icon-close {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1.25rem;
    display: none;
  }
  
  #main-header.blog-header .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
    display: none;
  }
  
  #main-header.blog-header .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon-close {
    display: block;
  }
}

/* Animações */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#main-header.blog-header.scrolled {
  animation: fadeInDown 0.4s;
}

/* Animação para links do conteúdo do blog */
.blog-link {
  color: var(--primary-color);
  text-decoration: none;
  position: relative;
  font-weight: 500;
  transition: all 0.3s ease;
}

.blog-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

.blog-link:hover {
  color: var(--secondary-color);
}

.blog-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}