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

html, body {
  height: 100%;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #0a0f1c;
  color: #fff;
  overflow: hidden;
}

/* Fondo de partículas */
#particles {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 0;
}

/* Contenido */
.content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px;
}

.content h1 {
  font-size: 3rem;
  background: linear-gradient(90deg, #00f5ff, #00ffb3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.content h2 {
  font-size: 1.5rem;
  font-weight: 400;
  color: #a8f7ff;
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
}

.content p {
  font-size: 1.1rem;
  color: #d0eaff;
  margin: 0.3rem 0;
}

.content .tagline {
  font-style: italic;
  opacity: 0.8;
  margin-top: 1rem;
}

/* Botón futurista */
.btn {
  display: inline-block;
  margin-top: 2rem;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: bold;
  color: #00ffcc;
  text-decoration: none;
  border: 2px solid #00ffcc;
  border-radius: 30px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,255,200,0.6), transparent);
  transition: 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  background: rgba(0, 255, 200, 0.1);
  color: #fff;
  box-shadow: 0 0 15px #00ffcc;
}

/* Marca de agua */
.watermark {
  position: fixed;
  bottom: 20px;
  width: 100%;
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.25);
  letter-spacing: 2px;
  font-style: italic;
  z-index: 1;
  user-select: none;
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    text-shadow: 0 0 5px rgba(0, 255, 200, 0.3);
  }
  to {
    text-shadow: 0 0 15px rgba(0, 255, 200, 0.6);
  }
}