@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;700&family=Orbitron:wght@500;800;900&display=swap');

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

body {
  font-family: 'Fira Code', monospace;
  background-color: #05050a; /* Fondo ultra oscuro futurista */
  color: #a0aec0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

/* LA TARJETA CON BRILLO NEÓN CYAN */
.card {
  background-color: #0d0e15; /* Tarjeta oscura */
  max-width: 380px;
  width: 100%;
  padding: 40px 25px;
  border: 2px solid #00f0ff; /* Borde neón cyan */
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.35); /* Glow cyan */
  border-radius: 16px;
  text-align: center;
  position: relative;
  transition: all 0.3s ease-in-out;
}

.card:hover {
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
  transform: translateY(-2px);
}

/* AVATAR CON BRILLO NEÓN MAGENTA/ROSA */
header .avatar-glow {
  display: inline-block;
  position: relative;
  margin-bottom: 20px;
}

header .avatar-glow::before {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50%;
  background: linear-gradient(45deg, #00f0ff, #ff007f);
  z-index: 1;
  box-shadow: 0 0 15px rgba(255, 0, 127, 0.6);
}

header img {
  width: 105px;
  height: 105px;
  border-radius: 50%;
  border: 3px solid #0d0e15;
  position: relative;
  z-index: 2;
  object-fit: cover;
}

header h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.8rem;
  font-weight: 900;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.6); /* Brillo de texto */
  margin-bottom: 5px;
}

main {
  margin-top: 10px;
  margin-bottom: 30px;
}

main h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.9rem;
  font-weight: 800;
  color: #ff007f; /* Texto rosa neón */
  letter-spacing: 2px;
  text-shadow: 0 0 5px rgba(255, 0, 127, 0.4);
  margin-bottom: 15px;
}

main p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: #94a3b8;
}

/* Palabras resaltadas estilo terminal cyberpunk */
main .highlight {
  color: #00f0ff;
  font-weight: 700;
  text-shadow: 0 0 5px rgba(0, 240, 255, 0.4);
}

main strong {
  color: #ffffff;
  font-weight: 700;
  border-bottom: 1px dashed #ff007f;
}

main em {
  font-style: normal;
  color: #facc15;
}

/* BOTONERA DE ENLACES CON GLOW DE HOVER */
section h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 3px;
  color: #8291a8;
  margin-bottom: 20px;
  text-align: left;
  border-bottom: 1px solid #1e293b;
  padding-bottom: 8px;
}

section ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

section ul li a {
  display: block;
  text-decoration: none;
  color: #00f0ff; /* Color de link neón */
  background-color: #0a0b10;
  padding: 14px;
  font-weight: 700;
  font-size: 0.85rem;
  border: 1px solid #1e293b;
  border-radius: 8px;
  transition: all 0.2s ease-in-out;
  text-align: left;
}

/* Hover: el botón se ilumina en magenta y cambia el texto */
section ul li a:hover {
  color: #ffffff;
  background-color: #ff007f;
  border-color: #ff007f;
  box-shadow: 0 0 15px rgba(255, 0, 127, 0.7);
  transform: translateX(4px);
  text-shadow: 0 0 5px #ffffff;
}

footer {
  margin-top: 35px;
  font-size: 0.7rem;
  color: #8291a8;
  letter-spacing: 1px;
}

/* --- ESTILOS DE INTERACCIÓN (JS) --- */
.actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 25px;
}

#btn-saludo {
  flex: 1;
  padding: 14px;
  font-family: 'Fira Code', monospace;
  font-weight: 700;
  font-size: 0.85rem;
  background-color: #0a0b10;
  color: #ff007f;
  border: 1px solid #ff007f;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  text-shadow: 0 0 5px rgba(255, 0, 127, 0.4);
  box-shadow: 0 0 10px rgba(255, 0, 127, 0.2);
}

#btn-saludo:hover {
  background-color: #ff007f;
  color: #ffffff;
  box-shadow: 0 0 15px rgba(255, 0, 127, 0.7);
  text-shadow: 0 0 5px #ffffff;
}

#btn-theme {
  position: absolute;
  top: 16px;
  right: 16px;
  margin: 0;
  z-index: 10;
  padding: 14px 18px;
  font-size: 1rem;
  background-color: #0a0b10;
  color: #00f0ff;
  border: 1px solid #00f0ff;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  text-shadow: 0 0 5px rgba(0, 240, 255, 0.4);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

#btn-theme:hover {
  background-color: #00f0ff;
  color: #0a0b10;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.7);
  text-shadow: none;
}

/* --- MODO CLARO (LIGHT MODE) --- */
body.light-mode {
  background-color: #eef6f8;
  color: #2d3748;
}

body.light-mode .card {
  background-color: #ffffff;
  border-color: #00808a;
  box-shadow: 0 10px 25px rgba(0, 128, 138, 0.15);
}

body.light-mode .card:hover {
  box-shadow: 0 15px 35px rgba(0, 128, 138, 0.3);
}

body.light-mode header h1 {
  color: #1a202c;
  text-shadow: 0 2px 4px rgba(0, 128, 138, 0.2);
}

body.light-mode main h2 {
  color: #d0006f;
  text-shadow: none;
}

body.light-mode main p {
  color: #4a5568;
}

body.light-mode main .highlight {
  color: #00808a;
  text-shadow: none;
}

body.light-mode main strong {
  color: #1a202c;
  border-bottom-color: #d0006f;
}

body.light-mode main em {
  color: #a3540a;
}

body.light-mode section h3 {
  color: #55627a;
  border-bottom-color: #e2e8f0;
}

body.light-mode section ul li a {
  color: #00707a;
  background-color: #f7fafc;
  border-color: #e2e8f0;
}

body.light-mode section ul li a:hover {
  color: #ffffff;
  background-color: #d0006f;
  border-color: #d0006f;
  box-shadow: 0 0 15px rgba(208, 0, 111, 0.5);
  text-shadow: 0 0 2px #ffffff;
}

body.light-mode #btn-saludo {
  background-color: #f7fafc;
  color: #d0006f;
  border-color: #d0006f;
  box-shadow: 0 4px 6px rgba(208, 0, 111, 0.1);
  text-shadow: none;
}

body.light-mode #btn-saludo:hover {
  background-color: #d0006f;
  color: #ffffff;
  box-shadow: 0 0 12px rgba(208, 0, 111, 0.4);
}

body.light-mode #btn-theme {
  background-color: #f7fafc;
  color: #00808a;
  border-color: #00808a;
  box-shadow: 0 4px 6px rgba(0, 128, 138, 0.1);
  text-shadow: none;
}

body.light-mode #btn-theme:hover {
  background-color: #00808a;
  color: #ffffff;
  box-shadow: 0 0 12px rgba(0, 128, 138, 0.4);
}

body.light-mode footer {
  color: #55627a;
}

/* Transiciones suaves para cambios de tema */
body,
.card,
header h1,
main h2,
main p,
main strong,
main em,
main .highlight,
section h3,
section ul li a,
#btn-saludo,
#btn-theme,
footer {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s, text-shadow 0.3s ease;
}

/* --- CAJA DEL SALUDO (la escribe JavaScript) --- */
#saludo {
  margin-top: 18px;
  padding: 12px 14px;
  font-family: 'Fira Code', monospace;
  font-weight: 700;
  font-size: 0.8rem;
  text-align: center;
  color: #00f0ff;
  background-color: rgba(0, 240, 255, 0.08);
  border: 1px solid #00f0ff;
  border-radius: 8px;
  text-shadow: 0 0 5px rgba(0, 240, 255, 0.4);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

#saludo:empty {
  display: none;
}

body.light-mode #saludo {
  color: #0077a3;
  background-color: #eefbff;
  border-color: #0077a3;
  text-shadow: none;
  box-shadow: 0 4px 6px rgba(0, 119, 163, 0.1);
}