body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background-color: black;
  }

  .panel {
    height: 100vh;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    position: relative;
  }

  .sao-logo {
    font-family: 'Antonio', sans-serif !important;
    font-weight: 700 !important;
    color: white !important;
  }

  .sao-accent {
    color: red !important;
    font-family: 'Antonio', sans-serif !important;
    font-weight: 200 !important;
  }

  .sao-white {
    color: white !important;
  }


  /* Botón base sin borde */
  .sao_button_b {
    font-family: 'Antonio', sans-serif !important;
    font-weight: 700 !important;
    position: relative;
    display: inline-block;
    background: none;
    border: none;
    color: #ffffff;
    font-weight: 700;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: color 0.3s ease, transform 0.5s ease;
    overflow: visible;
  }

  .sao_button_b:hover {
    color: #ff0000;
    text-decoration: none;
  }


  .sao_button_a {
    font-family: 'Antonio', sans-serif !important;
    font-weight: 700 !important;
    position: relative;
    display: inline-block;
    padding: 0.75em 1.5em;
    background: none;
    border: none;
    color: #ff0000;
    font-weight: 700;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: color 0.3s ease, transform 0.5s ease;
    overflow: visible;
  }

  /* Luz roja inicial */
  .sao_button_a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 4px;
    background-image:
    /* punto caliente izquierdo */ 
    radial-gradient(circle at 40% 50%, rgba(255,0,0,1) 0%, rgba(255,0,0,0) 50%),
    /* punto caliente derecho */ 
    radial-gradient(circle at 60% 50%, rgba(255,0,0,1) 0%, rgba(255,0,0,0) 50%),
    /* barra fina entre puntos */ 
    linear-gradient(to right,
      rgba(255,0,0,0.2),
      rgba(255,0,0,0.2)
    );
    background-repeat: no-repeat;
    filter: blur(4px);
    transition:
    width 1s ease,
    filter 0.3s ease,
    background-image 0.3s ease;
  }


  /* Hover: botón crece, texto blanco, luz se enciende y se estira */
  .sao_button_a:hover {
    color: #ffffff;
    transform: scale(1.15);       /* Crece un 15% */
    text-decoration: none;
  }

  .sao_button_a:hover::after {
    width: 80%;
    filter: blur(6px);
  }

  /* Active (clic): opcional, resalta la interacción */
  .sao_button_a:active {
    transform: scale(1.1);        /* Leve hundido al click */
  }

  .sao_button_a:active::after {
    background: rgba(255, 100, 100, 1);
    filter: blur(6px);
  }

/* transiciones en paneles */
.panel {
  transition: transform 0.3s ease;
}

/* overlay para frosted-glass */
.panel .overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0);
  transition: background 1.2s ease, backdrop-filter 5.2s ease;
  pointer-events: none;
}

/* Hover solo en pantallas ≥640px */
@media (min-width: 640px) {
  .panel:hover {
    transform: scale(1.02);    /* agranda 10% */
    transition: transform 1.2s ease;
    z-index: 1;
  }
  .panel:hover .overlay {
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(50px);
  }
}