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

body {
  position: relative;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at center, rgba(0, 180, 255, 0.14), transparent 35%),
    linear-gradient(135deg, #020b18, #03111f 45%, #010711);
  color: #ffffff;
  overflow-x: hidden;
}

.nexoralogo {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  margin: 0 auto;
  opacity: 0.1;
}

.presentacion {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: rgba(4, 15, 29, 0.72);
  font-size: 1.3rem;
  text-align: center;
  padding: 20px;
  width: min(500px, 90%);
  border: 1px solid #010711;
  border-radius: 12px;
  line-height: 1.7;
  min-height: 60vh;
  box-shadow: 0 8px 22px rgba(0, 212, 255, 0.35);
  animation: brillo 5s ease infinite;
}

@keyframes brillo {
  0% { box-shadow: 0 10px 24px rgba(0, 212, 255, 0.5); }
  20% { box-shadow: 0 8px 22px rgba(0, 212, 255, 0.35); }
  40% { box-shadow: 0 10px 24px rgba(0, 212, 255, 0.5); }
  60% { box-shadow: 0 8px 22px rgba(0, 212, 255, 0.35); }
  80% { box-shadow: 0 10px 24px rgba(0, 212, 255, 0.5); }
  100% { box-shadow: 0 10px 24px rgba(0, 212, 255, 0.5); }
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(90deg, #49e8ff, #1676ff, #d6f7ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: bolder;
  margin-bottom: 40px;
  line-height: 0.9;
  font-family: 'Sora', sans-serif;
}

input[type="email"], input[type="password"] {
  width: 90%;
  max-width: 320px;
  padding: 14px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

input[type="email"]::placeholder, input[type="password"]::placeholder {
  font-size: 1rem;
  color: #6d6d6d;
  font-style: italic;
}

button {
  padding: 12px 28px;
  border: 1px solid rgba(0, 212, 255, 0.7);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.18), rgba(0, 212, 255, 0.06));
  color: #eafcff;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: .2s ease;
}

button:hover {
  transform: scale(1.04);
  box-shadow: 0 8px 18px rgba(0, 212, 255, 0.22);
}