body { 
    font-family: 'Inter', sans-serif;
}
.font-poppins { 
    font-family: 'Poppins', sans-serif; 
}
.pantalla { 
    display: none; 
}
.pantalla.activa { 
    display: flex; 
}

.animated-gradient {
    background: linear-gradient(45deg, #6c2bd9, #b83280, #ff6b00, #2c89d9);
    background-size: 400% 400%;
    animation: gradient-animation 15s ease infinite;
}

@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.glass-card {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.game-code-text {
    background: linear-gradient(45deg, #a2facf, #64acff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2);
}

.respuesta-color-0 { background-color: #e53e3e; }
.respuesta-color-1 { background-color: #3b82f6; }
.respuesta-color-2 { background-color: #d97706; }
.respuesta-color-3 { background-color: #10b981; }
.text-shadow { 
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4); 
}

.respuesta-correcta {
    box-shadow: 0 0 0 4px white, 0 0 0 8px #22c55e;
    transform: scale(1.05);
}
#temporizador-circulo {
    stroke-dasharray: 283;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear;
}

#volumen-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 7rem;
    height: 0.5rem;
    background-color: rgba(148, 163, 184, 0.45);
    border-radius: 9999px;
    outline: none;
    overflow: hidden;
}

#volumen-slider::-webkit-slider-runnable-track {
    height: 0.5rem;
    background-color: transparent;
}

#volumen-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 1rem;
    height: 1rem;
    border-radius: 9999px;
    background-color: #3b82f6;
    border: 2px solid rgba(255, 255, 255, 0.7);
    box-shadow: -200px 0 0 200px rgba(59, 130, 246, 0.35);
    margin-top: -0.25rem;
}

#volumen-slider::-moz-range-track {
    height: 0.5rem;
    background-color: rgba(148, 163, 184, 0.45);
    border-radius: 9999px;
}

#volumen-slider::-moz-range-progress {
    height: 0.5rem;
    background-color: rgba(59, 130, 246, 0.35);
    border-radius: 9999px;
}

#volumen-slider::-moz-range-thumb {
    width: 1rem;
    height: 1rem;
    border-radius: 9999px;
    background-color: #3b82f6;
    border: 2px solid rgba(255, 255, 255, 0.7);
}