.box-shadow:hover {
    box-shadow: 0px 8px 16px rgba(0, 0, 0, 0.2);
}

html {
    scroll-behavior: smooth;
}

#navbar {
    transition: top 0.3s;
    /* Transition effect when sliding down (and up) */
}

.phone {
    display: none;
}

#topBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    font-size: 25px;
    border: none;
    outline: none;
    background-color: none;
    opacity: 0.5;
    color: black;
    cursor: pointer;
    padding: 7px 16px;
    border-radius: 63px;
}


@media screen and (min-width: 462px) {

    span#calorieResult,
    sup>i.fa {
        font-size: 2.5rem !important;
    }

    #SD {
        font-size: 1.5rem;
    }

    h5.responsive {
        font-size: 1rem !important;
    }
}

/* //large phone */
@media screen and (max-width: 504px) and (min-width: 376px) {
    .heading {
        display: none;
    }

    .phone {
        display: inline-block;
    }

    #calorieResult,
    sup>i.fa {
        font-size: 1.41rem !important
    }

    h5#SD {
        font-size: 14px !important;
        margin-top: 6px;
    }

    sub.lg {
        display: none;
    }

    h5.d-inline-block {
        font-size: 1rem;
    }
}

/* //medium phone */
@media screen and (max-width: 375px) and (min-width: 319px) {
    .heading {
        display: none;
    }

    .phone {
        display: inline-block;
    }

    #calorieResult,
    sup>i.fa {
        font-size: 1.41rem !important
    }

    h5#SD {
        font-size: 14px !important;
        margin-top: 6px;
    }

    sub.lg {
        display: none;
    }

    h5.d-inline-block {
        font-size: 1rem;
    }
}

/* Small Phone */
@media screen and (max-width: 320px) {
    .heading {
        display: none;
    }

    #calculateTitle,
    #BMRResult,
    #SD {
        font-size: 1.2rem;
    }

    .phone {
        display: inline-block;
    }

    .text-danger {
        font-size: 0.8rem;
    }

    sub.lg {
        display: none;
    }

    span {
        font-size: 20px;
    }

    h5#BMRResult,
    span.calorieResult,
    sup>i.fa {
        font-size: 1rem;
    }

    h5#SD {
        font-size: 13px !important;
        margin-top: 6px;
    }

    h4 {
        font-size: 1.2rem;
    }

}

.dark-mode {
    background-color: black;
    color: white !important;
}

img {
    transition: transform .2s;
    /* Animation */
    max-width: 100%;
    height: auto;
    cursor: zoom-in;
}

img:hover {
    transform: scale(1.5);
    z-index: 2;
    /* (150% zoom - Note: if the zoom is too large, it will go outside of the viewport) */
}

/* The switch - the box around the slider */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

/* Hide default HTML checkbox */
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

/* The slider */
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc !important;
    -webkit-transition: .4s;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked+.slider {
    background-color: #2196F3 !important;
}

input:focus+.slider {
    box-shadow: 0 0 1px #2196F3 !important;
}

input:checked+.slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}