* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #18002e, #5a189a, #7b2cbf);
  display: flex;
  align-items: center;
  justify-content: center;
}
.container {
  width: 90%;
  max-width: 480px;
  padding: 32px 20px;
  text-align: center;
}
.logo {
  width: 100%;
  max-width: 350px;
  border-radius: 32px;
  display: block;
  margin: 0 auto 24px;
}
h1 {
  color: #fff;
  font-size: 36px;
  margin: 0 0 10px;
}
.aviso {
  color: #eadfff;
  font-size: 14px;
  margin: 0 0 24px;
}
.botao {
  display: inline-block;
  padding: 16px 40px;
  background: #ffd700;
  color: #4b0082;
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 12px;
}
.botao:hover { filter: brightness(1.05); }