html, body {
    height: 100%;
    max-width: 470px;
    font-family: 'Yekan', sans-serif;
    margin: 0 auto;
    border-right: 1px #eee solid;
    border-left: 1px #eee solid;
    background-color: #eee;
    overflow-x: hidden;
}

.home-card {
    background-image: url("../img/card-cover.jpg");
    background-color: #EEE9EA;
    min-height: 150px;
    background-size: 75%;
    background-repeat: no-repeat;
    background-position: -51px -26px;
}

.question-card {
    background-image: url("../img/bg.png");
    background-repeat: no-repeat;
    background-position: -36% -9%;
}

.logo {
    -webkit-filter: grayscale(100%); /* Safari 6.0 - 9.0 */
    filter: grayscale(100%);
}

.btn-neon {
    position: relative;
    transition: all 0.4s ease;
    z-index: 1;
}

.neon-pulse {
    overflow: visible;
}

.neon-pulse::before,
.neon-pulse::after {
    content: "";
    position: absolute;
    inset: -4px;
    border: 2px solid var(--bs-blue);
    border-radius: inherit;
    animation: pulseOut 2s ease-out infinite;
    opacity: 0;
}

.neon-pulse.success::before,
.neon-pulse.success::after {
    border: 2px solid var(--bs-green);
}

.neon-pulse::after {
    animation-delay: 1s;
}

@keyframes pulseOut {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

#options label.form-check {
    transition: all 0.5s ease-in-out;
}

#options label.form-check.bg-warning-subtle {
    margin-right: 10px;
}