* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", "Segoe UI", sans-serif;
  }
  
  :root {
    --cor-principal: #00c2a8;
    --cor-secundaria: #00796b;
    --cor-fundo: #0e0e0e;
    --cor-texto: #ffffff;
    --cor-detalhe: rgba(255, 255, 255, 0.1);
    --radius: 18px;
    --transicao: 0.3s ease;
  }
  
  /* =========================
     FUNDO
  ========================= */
  body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #000000, #00c2a8, #009688);
    background-size: 300% 300%;
    animation: fundoAnimado 8s ease infinite;
    color: var(--cor-texto);
  }
  
  @keyframes fundoAnimado {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  /* =========================
     CONTAINER
  ========================= */
  .container {
    background: rgba(255, 255, 255, 0.08);
    padding: 2rem;
    border-radius: var(--radius);
    width: 90%;
    max-width: 400px;
    text-align: center;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.4);
    animation: surgir 0.7s ease forwards;
    opacity: 0;
    transform: translateY(20px);
  }
  
  @keyframes surgir {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* =========================
     TÍTULOS
  ========================= */
  h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.5rem;
  }
  
  #userName {
    font-size: 1.1rem;
    color: #ffffff;
    margin-bottom: 1.5rem;
    opacity: 0.9;
  }
  
  /* =========================
     BOTÃO DE SAIR
  ========================= */
  #logoutBtn {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(90deg, var(--cor-principal), var(--cor-secundaria));
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transicao);
    box-shadow: 0 5px 15px rgba(0, 194, 168, 0.4);
  }
  
  #logoutBtn:hover {
    background: linear-gradient(90deg, #00e5c0, #009688);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 194, 168, 0.6);
  }
  
  /* =========================
     RESPONSIVIDADE
  ========================= */
  @media (max-width: 480px) {
    .container {
      padding: 1.5rem;
    }
    h2 {
      font-size: 1.7rem;
    }
    #logoutBtn {
      font-size: 0.95rem;
    }
  }