body, html {
  height: 100%;
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: #f8fafb;
  overflow: hidden;
}

/* Fondo de partículas */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: -2;
  top: 0;
  left: 0;
  background: radial-gradient(circle at center, #ffffff 0%, #eafaf2 50%, #dff6e9 100%);
}

/* Contenedor principal */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

/* Tarjeta */
.login-card {
  background: rgba(255,255,255,0.95);
  border-radius: 20px;
  width: 100%;
  max-width: 400px;
  animation: fadeIn 1s ease-in-out;
  border: 1px solid #d7e8dc;
}

/* Círculo con video */
.video-circle {
  width: 180px;
  height: 180px;
  margin: 0 auto;
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  border: 5px solid #20a574;
  box-shadow: 0 0 25px rgba(32,165,116,0.4);
  animation: float 5s ease-in-out infinite;
}

.video-circle video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Botón */
.btn-success {
  background-color: #1ea76d;
  border: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-success:hover {
  background-color: #20bf7b;
  box-shadow: 0 0 15px rgba(30,191,123,0.5);
}

/* Animaciones */
@keyframes fadeIn {
  from {opacity: 0; transform: translateY(15px);}
  to {opacity: 1; transform: translateY(0);}
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}