:root {
    /* ===== DIMENSIONES ===== */
    --btn-w: 240px;           /* ancho */
    --btn-h: 50px;            /* alto */
    --border-size: 1px;       /* grosor del borde */
    --radius: 12px;           /* radio del borde */

    /* ===== COLORES ===== */
    --color-bg: #0d0d0d;              /* fondo general */
    --color-inner: #0b0000;           /* fondo interno del botón */
    --color-fire-1: #ff3300;          /* rojo base */
    --color-fire-2: #ff6600;          /* naranja intenso */
    --color-fire-3: #ff9900;          /* amarillo fuego */
    --color-glow-1: rgba(255, 120, 0, 0.9);
    --color-glow-2: rgba(222, 30, 0, 0.7);
    --color-glow-3: rgba(250, 197, 52, 0.7);
    --color-text: #ffffff;
    --color-text-hover: #fff3e0;

    /* ===== FUENTE ===== */
    --font-size: 12px;
    --font-weight: 400;
    --font-transform: uppercase;
    --font-spacing: 1px;
  }

  /* ===== BOTÓN BASE ===== */
  .fire-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: var(--btn-w);
    height: var(--btn-h);

    border: none;
    border-radius: var(--radius);
    background: transparent;
    cursor: pointer;
    color: var(--color-text);

    font-size: var(--font-size);
    font-weight: var(--font-weight);
    text-transform: var(--font-transform);
    letter-spacing: var(--font-spacing);
    
   

    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }

  .fire-button:hover { transform: translateY(-2px); }
  .fire-button:active { transform: scale(0.98); }

  .fire-button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(255, 80, 0, 0.25);
  }

  /* ===== CAPAS DE BORDE Y GLOW ===== */
  .animated-border-box,
  .animated-border-box-glow {
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    overflow: hidden;
    pointer-events: none;
  }

  

  .animated-border-box-glow {
    filter: blur(25px);
    opacity: 0.9;
    z-index: -2;
  }

  .animated-border-box::after {
    content: "";
    position: absolute;
    inset: var(--border-size);
    background: radial-gradient(circle at center, #2a0000 0%, var(--color-inner) 100%);
    border-radius: calc(var(--radius) - var(--border-size));
    z-index: 1;
     background-image: url("../images/btn-background-2.gif");
    background-size: cover;
    background-position: center bottom;

    box-shadow: 
    0 0 10px 3px rgba(255, 111, 0, 0.4) inset;
  -webkit-box-shadow: 
    0 0 10px 3px rgba(255, 111, 0, 0.4) inset;
  -moz-box-shadow: 
    0 0 10px 3px rgba(255, 111, 0, 0.4) inset;

  animation: innerGlowPulse 3s ease-in-out infinite;

  }


  @keyframes innerGlowPulse {
  0% {
    box-shadow: 
      0 0 10px 3px rgba(255, 111, 0, 0.25) inset;
  }
  50% {
    box-shadow: 
      0 0 14px 5px rgba(255, 111, 0, 0.5) inset;
  }
  100% {
    box-shadow: 
      0 0 10px 3px rgba(255, 111, 0, 0.25) inset;
  }
}

  /* ===== GRADIENTES ANIMADOS ===== */
  .animated-border-box::before,
  .animated-border-box-glow::before {
    content: "";
    position: absolute;
    width: 200vmax;
    height: 200vmax;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(0deg);
    background-repeat: no-repeat;
    background-position: 0 0;
    animation: rotate 3s linear infinite;
    z-index: -3;
  }

  .animated-border-box::before {
    background-image: conic-gradient(
      from 0deg,
      rgba(0, 0, 0, 0),
      var(--color-fire-1),
      var(--color-fire-2),
      var(--color-fire-3),
      var(--color-fire-1),
      rgba(0, 0, 0, 0) 25%
    );
  }

  .animated-border-box-glow::before {
    background-image: conic-gradient(
      from 0deg,
      rgba(0, 0, 0, 0),
      var(--color-glow-1),
      var(--color-glow-2),
      var(--color-glow-3),
      rgba(0, 0, 0, 0) 25%
    );
  }

  @keyframes rotate {
    to { transform: translate(-50%, -50%) rotate(1turn); }
  }

  /* ===== TEXTO ===== */
  .btn-text {
    position: relative;
    z-index: 2;
    user-select: none;
    text-shadow: 0 0 10px var(--color-fire-1),
                 0 0 20px var(--color-fire-2);

                 
  }

  /* ===== EFECTO HOVER FLAMA ===== */
  .fire-button:hover .btn-text {
    color: var(--color-text-hover);
    text-shadow: 0 0 20px var(--color-fire-1),
                 0 0 40px var(--color-fire-2);
  }

  /* ===== RESPONSIVO ===== */
  @media (max-width:420px) {
    :root {
      --btn-w: 90%;
      --btn-h: 50px;
      --border-size: 1px;
      --radius: 15px;
      --font-size: 12px;
    }
  }