* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top, rgba(0, 119, 255, 0.16), transparent 35%),
    #05070d;
  color: #ffffff;
}

.container {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  padding: 35px 20px 25px;
}

.logo {
  text-align: center;
  margin-bottom: 30px;
}

.logo h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
}

.logo h1 span {
  color: #1683ff;
}

.logo p {
  margin-top: 8px;
  color: #8d9bad;
  font-size: 15px;
}

.hero {
  background: rgba(14, 18, 29, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 24px;
  padding: 28px 22px;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.45),
    0 0 30px rgba(0, 119, 255, 0.08);
}

.hero h2 {
  font-size: 27px;
  line-height: 1.2;
  margin-bottom: 12px;
}

.hero > p {
  color: #9aa6b7;
  line-height: 1.6;
  margin-bottom: 24px;
}

/* =========================
   CAMPOS DE LOGIN/CADASTRO
   ========================= */

.campo {
  width: 100%;
  margin-bottom: 17px;
}

.campo label {
  display: block;
  margin-bottom: 8px;
  color: #dbe5f2;
  font-size: 14px;
  font-weight: 600;
}

.campo input {
  width: 100%;
  height: 52px;
  padding: 0 16px;

  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 14px;

  background: rgba(5, 8, 15, 0.90);
  color: #ffffff;

  font-size: 15px;
  outline: none;

  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

.campo input::placeholder {
  color: #667386;
}

.campo input:focus {
  border-color: #1683ff;
  background: rgba(8, 13, 24, 0.98);

  box-shadow:
    0 0 0 3px rgba(22, 131, 255, 0.12),
    0 0 22px rgba(22, 131, 255, 0.10);
}

.campo input:valid {
  border-color: rgba(255, 255, 255, 0.14);
}

/* =========================
   BOTÕES
   ========================= */

.btn-recarregar {
  width: 100%;
  min-height: 52px;

  margin-top: 4px;
  padding: 14px 18px;

  border: none;
  border-radius: 14px;

  background: linear-gradient(
    135deg,
    #1683ff,
    #0066ff
  );

  color: #ffffff;

  font-size: 16px;
  font-weight: 700;

  cursor: pointer;

  box-shadow:
    0 10px 30px rgba(0, 102, 255, 0.25);

  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    opacity 0.15s ease;
}

.btn-recarregar:hover {
  transform: translateY(-1px);

  box-shadow:
    0 14px 35px rgba(0, 102, 255, 0.35);
}

.btn-recarregar:active {
  transform: scale(0.98);
}

.btn-recarregar:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

/* =========================
   BENEFÍCIOS
   ========================= */

.beneficios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 28px;
}

.beneficio {
  padding: 14px 8px;

  text-align: center;

  border-radius: 14px;

  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.icone {
  font-size: 21px;
  margin-bottom: 7px;
}

.beneficio span {
  color: #9aa6b7;
  font-size: 11px;
}

/* =========================
   MENSAGENS
   ========================= */

#mensagem {
  min-height: 20px;
  font-size: 14px;
  line-height: 1.4;
}

/* =========================
   RODAPÉ
   ========================= */

.footer {
  text-align: center;
  margin-top: 25px;

  color: #596577;
  font-size: 12px;
}

/* =========================
   CELULAR
   ========================= */

@media (max-width: 480px) {

  .container {
    padding: 25px 15px 20px;
  }

  .logo h1 {
    font-size: 29px;
  }

  .hero {
    padding: 24px 18px;
    border-radius: 21px;
  }

  .hero h2 {
    font-size: 24px;
  }

  .campo input {
    height: 54px;
    font-size: 16px;
  }

  .btn-recarregar {
    min-height: 54px;
  }

}