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

body {
  font-family: "Orbitron", sans-serif;
  color: #ffffff;
  background: radial-gradient(circle at center, #06101a, #000000);
  height: 100vh;
  overflow: hidden;
}

/* NAV SUPERIOR */
.nav-superior {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(5, 15, 30, 0.6);
  backdrop-filter: blur(10px);
  padding: 15px 0;
  text-align: center;
  border-bottom: 1px solid rgba(0, 217, 255, 0.3);
  box-shadow: 0 0 15px rgba(0, 217, 255, 0.2);
}

.nav-superior ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 50px;
}

.nav-superior a {
  text-decoration: none;
  color: #9ecfff;
  font-weight: bold;
  letter-spacing: 2px;
  transition: 0.3s;
  text-shadow: 0 0 8px rgba(0, 217, 255, 0.6);
}

.nav-superior a:hover {
  color: #ffffff;
  text-shadow: 0 0 12px #00d9ff, 0 0 20px #00d9ff;
}

/* CONTENIDO PRINCIPAL */
main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100vh;
  padding: 100px;
}

/* MENÚ IZQUIERDA */
.menu-central {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.menu-central a {
  text-decoration: none;
  color: #ffffff;
  font-size: 22px;
  padding: 12px 20px;
  border-left: 4px solid transparent;
  transition: all 0.3s ease-in-out;
}

.menu-central a:hover {
  border-left: 4px solid #00d9ff;
  color: #00d9ff;
  background: rgba(0, 217, 255, 0.1);
  box-shadow: inset 0 0 12px rgba(0, 217, 255, 0.6);
}

/* PANEL DE IMAGEN DERECHA */
.panel-imagen {
  background: rgba(255, 255, 255, 0.05);
  padding: 15px;
  border-radius: 6px;
  text-align: center;
  border: 1px solid rgba(0, 217, 255, 0.4);
  box-shadow: 0 0 15px rgba(0, 217, 255, 0.3);
}

.panel-imagen img {
  width: 280px;
  border: 2px solid #00d9ff;
  border-radius: 6px;
  margin-bottom: 10px;
  box-shadow: 0 0 12px rgba(0, 217, 255, 0.7);
}

/* ICONO ABAJO IZQUIERDA */
footer {
  position: fixed;
  bottom: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 15px;
  background: rgba(5, 15, 30, 0.6);
  border: 1px solid rgba(0, 217, 255, 0.4);
  padding: 10px 15px;
  border-radius: 6px;
  box-shadow: 0 0 12px rgba(0, 217, 255, 0.3);
}

.icono-parpadeante {
  width: 60px;
  height: 60px;
  animation: parpadeo 1.5s infinite alternate;
  filter: drop-shadow(0 0 8px #00d9ff);
}

@keyframes parpadeo {
  from { opacity: 1; filter: drop-shadow(0 0 8px #00d9ff); }
  to { opacity: 0.6; filter: drop-shadow(0 0 15px #00d9ff); }
}
body {
  background: url("wallpaperbetter.com_2560x1440.jpg") no-repeat center center fixed;
  background-size: cover;   /* Ocupa todo el espacio */
}
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 10, 20, 0.5); /* filtro azul oscuro */
  z-index: -1;
}
.menu {
  display: flex;
  justify-content: center;
  background: transparent; /* para que se vea el fondo */
  padding: 20px;
}

.menu ul {
  list-style: none;
  display: flex;
  gap: 50px; /* separación entre opciones */
  margin: 0;
  padding: 0;
}

.menu ul li a {
  text-decoration: none;
  font-size: 18px;
  color: #ffffff;
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: 0.3s;
}

.menu ul li.active a {
  padding: 5px 15px;
  border: 2px solid #00f0ff; /* borde brillante azul */
  border-radius: 4px;
  box-shadow: 0 0 10px #00f0ff;
}

.menu ul li a:hover {
  color: #00f0ff; /* efecto hover */
}
html {
  scroll-behavior: smooth;
}
/* SECCIÓN REGISTRO */
.registro-main {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 100px 20px;
}

.registro-section {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid #00d9ff;
  padding: 25px;
  border-radius: 10px;
  max-width: 500px;
  width: 100%;
  box-shadow: 0 0 15px rgba(0, 217, 255, 0.4);
}

.registro-section h2 {
  color: #00f0ff;
  text-align: center;
  margin-bottom: 15px;
  text-shadow: 0 0 10px #00f0ff;
}

.registro-section form label {
  display: block;
  margin-top: 10px;
  color: #ffffff;
  font-weight: bold;
}

.registro-section form input {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border-radius: 6px;
  border: 1px solid #00d9ff;
  background: rgba(0, 0, 0, 0.5);
  color: #ffffff;
}

.registro-section form button {
  width: 100%;
  padding: 12px;
  margin-top: 15px;
  border: none;
  border-radius: 6px;
  background: #00d9ff;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s;
}

.registro-section form button:hover {
  background: #00f0ff;
}

#mensaje {
  margin-top: 10px;
  text-align: center;
  font-weight: bold;
}

.registro-section ul {
  margin-top: 10px;
  padding-left: 20px;
  color: #ffffff;
}