* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Arial, sans-serif;
}

body {
  min-height: 100vh;
  background-image: url("images/fondo.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(10, 20, 35, 0.35);
  backdrop-filter: blur(2px);
}

.portal-box {
  position: relative;
  z-index: 2;
  width: 420px;
  padding: 50px 40px;
  border-radius: 22px;

  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);

  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
  text-align: center;
  color: white;
}

h1 {
  font-size: 34px;
  letter-spacing: 3px;
  margin-bottom: 15px;
  text-shadow: 0 3px 12px rgba(0, 0, 0, 0.45);
}

.subtitle {
  font-size: 15px;
  opacity: 0.85;
  margin-bottom: 35px;
}

.buttons {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

button {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 12px;

  background: #0ea5e9;
  color: white;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;

  cursor: pointer;
  transition: 0.3s ease;
}

button:hover {
  background: #0284c7;
  transform: translateY(-2px);
  box-shadow: 0 12px 25px rgba(14, 165, 233, 0.35);
}

button:active {
  transform: translateY(0);
}

.footer {
  margin-top: 35px;
  font-size: 12px;
  opacity: 0.75;
}