#scroll-to-top {
            /* Posicionamento Fixo */
            position: fixed;
            bottom: 30px; 
            right: 30px; 
            z-index: 1000;
            
            /* Formato de Bola e Dimensões */
            width: 56px; /* Um pouco maior para um toque moderno */
            height: 56px;
            border-radius: 50%;
            
            /* EFEITO LIQUID GLASS */
            background-color: rgba(0, 0, 0, 0.4); /* Fundo semi-transparente e claro */
            border: 1px solid rgba(255, 255, 255, 0.2); /* Borda sutil */
            
            /* O SEGREDO DO VIDRO FOSCO (Pode não funcionar em navegadores muito antigos) */
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px); /* Compatibilidade com Safari */
            
            /* Sombra Multi-camadas (Efeito de flutuação) */
            box-shadow: 
                0 4px 12px rgba(0, 0, 0, 0.2), /* Sombra principal */
                0 0 0 1px rgba(255, 255, 255, 0.1) inset; /* Borda de luz interna */
            
            /* Estilo e Seta (Para centralizar a seta) */
            display: flex;
            justify-content: center;
            align-items: center;
            text-decoration: none;
            cursor: pointer;
            transition: all 0.2s ease-in-out;
        }

        /* Estilo da Seta */
        #scroll-to-top::before {
            content: '▲'; /* Seta Unicode simples */
            color: #ffffff;
            font-size: 20px;
            font-weight: 700;
            opacity: 0.9;
            transition: transform 0.2s;
        }

        /* Efeito Hover (Interação) */
        #scroll-to-top:hover {
            background-color: rgba(255, 255, 255, 0.2);
            box-shadow: 
                0 6px 15px rgba(0, 0, 0, 0.3),
                0 0 0 1px rgba(255, 255, 255, 0.15) inset;
        }

        /* Efeito de Clique (Active State) */
        #scroll-to-top:active {
            transform: scale(0.95);
        }

html {
    scroll-behavior: auto; /* Deixa o JS controlar a suavidade, evita conflitos */
}

/* ===================== */
/* Paleta base personalizada (branco, cinza, preto, vermelho, azul, amarelo) */
/* ===================== */
:root {
  --c-white: #ffffff;
  --c-white2: #eeeeee;
  --c-black: #000000;
  --c-gray: #2b2f36;
  --c-gray-2: #3a3f46;
  --c-red: #ff3b3b;
  --c-blue: #1a73ff;
  --c-yellow: #ffd43b;
}

/* ===================== */
/* Estilos Globais */
/* ===================== */
body {
  text-align: center;
  color: var(--c-black);
  font-family: sans-serif;
  margin: 0;
  padding: 0;
}

/* ===================== */
/* Background Animado do Site */
/* ===================== */
body {
  background-color: #c2c2c2; /* fundo base escuro */
  background-image: 
    radial-gradient(circle at center, rgba(255,255,255,0.03) 1px, transparent 1px),
    radial-gradient(circle at center, rgba(255,255,255,0.02) 2px, transparent 2px),
    radial-gradient(circle at center, rgba(255,255,255,0.01) 4px, transparent 4px);
  background-size: 20px 20px, 40px 40px, 80px 80px; /* círculos concêntricos */
  background-position: center;
  background-repeat: repeat;
  color: rgb(0, 0, 0); /* texto padrão branco para contraste */
}

/* Opcional: animação leve de rotação do vinil */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at center, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 100px 100px;
  opacity: 0.05;
  z-index: 0;
  animation: spin 300s linear infinite; /* rotação lenta */
    /* ADICIONE ESTA LINHA */
  pointer-events: none; /* permite clicar em tudo acima */
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}


/*
 * =====================
 * Header e Menus
 * =====================
 */

 h2 {
  color: var(--c-black);
  font-size: 2.2rem;
}

#developer h3,
#photographer h3,
#certificados h3,
#cv h2,
#proj h3,
#foto h3,
#cvcnt h3,
#sbrcnt h3 {
  color: var(--c-gray);
}

#idx p,
#developer p,
#photographer p,
#certificados p,
#proj p,
#foto p, 
#cvcnt p, ul,
#sbrcnt p, blockquote {
  color: var(--c-gray)
}

/* ===================== */
/* Hero Section */
/* ===================== */
.hero-wrap {
  background: 
    radial-gradient(1200px 600px at 10% 10%, rgba(155, 155, 155, 0.300), transparent 70%),
    radial-gradient(900px 500px at 90% 80%,  rgba(167, 167, 167, 0.500), transparent 70%);
    position: relative;
    z-index: 0;
}

/* ===================== */
/* Cards (Projetos, Fotografia, Certificados) */
/* ===================== */
.card {
    background-color: rgba(15, 22, 32, 0.356) !important; /* leve transparência */
  backdrop-filter: blur(0px) !important;
  color: var(--c-gray);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .10);
  border-radius: 1rem;
}

.card img {
  filter: brightness(0.8);
}

.card h3 {
  color: var(--c-white);
}

/* Alteração específica: descrição dos certificados */
#certificados .card p {
  color: var(--c-white);
}

/* ===================== */
/* Certificados com bordas arredondadas */
/* ===================== */
#certificados .card {
  border-radius: 1rem; /* bordas arredondadas mais suaves */
  overflow: hidden;      /* garante que imagens respeitem as bordas */
}

#cert-track {
  border-radius: 1rem;
  overflow: hidden;
}

/* ===================== */
/* Botões Primários */
/* ===================== */
.btn {
  border-radius: .8rem;
  font-weight: 600;
  transition: transform .15s ease, box-shadow .15s ease !important;
  background: var(--c-gray-2);
  color: var(--c-white);
}

.btn:hover {
  background: var(--c-white2);
  color: var(--c-black);
  transition: transform .15s ease, box-shadow .15s ease !important;
}

.btn:active {
  transform: translateY(1px);
}

/* ===================== */
/* Timeline (Experiência Profissional) */
/* ===================== */
@media (min-width: 768px) {
  .timeline:before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    transform: translateX(-50%);
    background: linear-gradient(180deg, var(--c-red), var(--c-blue));
    border-radius: 999px;
  }
}

/* ===================== */
/* Carrossel de Certificados - Ocultar barra de rolagem */
/* ===================== */
#cert-track {
  scrollbar-width: none;
}

#cert-track::-webkit-scrollbar {
  display: none;
}

/* ===================== */
/* Slideshow (Fotografia) */
/* ===================== */
.slideshow-container {
  position: relative;
  width: 100%;
  padding-top: 66.66%; /* proporção 3:2 */
  overflow: hidden;
  border-radius: 1rem;
  margin-bottom: 12px;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.slide.active {
  opacity: 1;
}

/* ===================== */
/* Experiência Profissional (CV) */
/* ===================== */
#cv {
    border-radius: 1rem;

  background-color: rgba(15, 22, 32, 0.356) !important; /* leve transparência */
  backdrop-filter: blur(10px) !important;
    position: relative;
    z-index: 0;
}

#cv p {
  color: var(--c-white2);
}

#cv h3 {
  color: var(--c-white);
}

/* ===================== */
/* Footer */
/* ===================== */
footer {
  color: var(--c-white);
  background-color: rgba(15, 22, 32, 0.356); /* mesmo fundo */
  backdrop-filter: blur(30px);              /* mesmo blur */
}

/* Popup de Aniversário ativo */
#birthday-popup.show {
  opacity: 1 !important;
  pointer-events: auto !important;
}

/* Animação suave */
@keyframes fadeIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.animate-fadeIn {
  animation: fadeIn 0.6s ease-out;
}

/* Bounce lento do logo */
@keyframes bounce-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15%); }
}
.animate-bounce-slow { animation: bounce-slow 1.5s infinite; }

/* Linha de loading que se expande */
@keyframes loading-bar {
  0% { transform: scaleX(0); }
  50% { transform: scaleX(1); }
  100% { transform: scaleX(0); }
}
.animate-loading {
  transform-origin: left;
  animation: loading-bar 1.5s infinite;
}

/* ====================== */
/* Code Demos Section     */
/* ====================== */

/* Section Code Demos */
#code-demos {
  padding: 4rem 1rem;
}

#code-demos h2 {
  text-align: center;
  /* font-size: 1.8rem; */
  color: #fff;
  margin-bottom: 2rem;
}

/* grid responsivo */
#code-demos .grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  #code-demos .grid {
    grid-template-columns: repeat(2, 1fr); /* lado a lado */
  }
}