.container{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
  box-sizing:border-box;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color:#111;
  margin:0;
  /* Camadas suaves: duas bolhas e um gradiente animado */
  /* fundo colorido mais vibrante para chamar atenção */
  background: linear-gradient(120deg, #0f172a 0%, #0b1220 10%, #3b82f6 40%, #06b6d4 70%, #10b981 100%);
  position:relative;
  overflow:hidden;
}

/* bolhas animadas sobre o fundo */
.container::before{
  content: "";
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 15% 20%, rgba(16,185,129,0.10), transparent 12%),
    radial-gradient(circle at 85% 80%, rgba(99,102,241,0.10), transparent 12%);
  transform: scale(1);
  animation: floatBubbles 12s ease-in-out infinite;
  pointer-events: none;
  z-index:0;
}
.card{
  background: linear-gradient(180deg, rgba(255,255,255,0.94), rgba(250,250,255,0.86));
  border-radius:12px;
  box-shadow:0 12px 40px rgba(16,24,40,0.10);
  border: 1px solid rgba(16,24,40,0.04);
  backdrop-filter: blur(6px);
  padding:28px;
  max-width:720px;
  width:100%;
  text-align:center;
  position:relative;
  z-index:1;
}
.card.small{ max-width:420px; padding:20px;}
.image-wrap{ display:flex; align-items:center; justify-content:center; margin-bottom:18px;}
.campaign{ max-width:100%; width:320px; height:auto; display:block; }
.title{ font-size:24px; margin:8px 0 4px; }
.subtitle{ color:#555; margin-bottom:18px; }
.slideshow{ position:relative; width:100%; max-width:520px; height:auto; display:block; }
.slideshow .slide{ position:absolute; left:50%; top:0; transform:translateX(-50%); width:100%; max-width:520px; opacity:0; transition:opacity .6s ease; border-radius:10px; }
.slideshow .slide.active{ opacity:1; position:relative; }
.buttons{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-top:12px;}
.btn{
  display:inline-block;
  padding:10px 18px;
  border-radius:10px;
  text-decoration:none;
  font-weight:600;
  cursor:pointer;
  border:0;
}
.btn-primary{
  background: linear-gradient(90deg,#10b981,#06b6d4);
  color:white;
  box-shadow: 0 8px 30px rgba(6,182,212,0.18), 0 2px 6px rgba(16,24,40,0.12);
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn-primary:hover{ transform: translateY(-3px); box-shadow: 0 14px 40px rgba(6,182,212,0.20); }
.btn-secondary{
  background: rgba(255,255,255,0.95);
  color:#0f172a;
  border:2px solid rgba(15,23,42,0.06);
  box-shadow: 0 6px 18px rgba(2,6,23,0.06);
}
.btn.small{ padding:8px 14px; font-size:14px; }
.foot{ font-size:13px; color:#777; margin-top:16px; }
.form{ display:flex; flex-direction:column; gap:10px; text-align:left; }
.form label{ font-size:14px; display:flex; flex-direction:column; gap:6px; }
.form input[type="text"], .form input[type="email"]{
  padding:10px;
  border-radius:8px;
  border:1px solid #e6e9f2;
  outline:none;
  font-size:14px;
}
.alert{ padding:10px; border-radius:8px; margin-bottom:10px; }
.alert-success{ background:#ecfdf5; color:#065f46; border:1px solid #bbf7d0; }
.alert-error{ background:#fff1f2; color:#9f1239; border:1px solid #fecaca; }
@media (max-width:480px){
  .campaign{ width:90%; }
  .card{ padding:18px; }
  .buttons{ flex-direction:column; }
}

/* Animação de gradiente de fundo */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes floatBubbles {
  0% { transform: translateY(0) scale(1); opacity:0.9; }
  50% { transform: translateY(-6%) scale(1.02); opacity:1; }
  100% { transform: translateY(0) scale(1); opacity:0.9; }
}