:root {
    --dk-violet: hsl(268, 75%, 9%);
    --lt-violet: hsl(268, 47%, 21%);
    --lt-violet2: hsl(281, 89%, 26%);
    --vb-violet: hsl(285, 91%, 52%);
    --vb-violet2: hsl(290, 70%, 36%);
    --vb-yellow: hsl(52, 100%, 62%);
    --pl-white: hsl(0, 0%, 100%);
    --vb-cyan: hsl(176, 100%, 44%);
    --vb-cyan2: hsl(177, 92%, 70%);
    --dk-text: hsl(198, 20%, 13%);
}

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'League Spartan', sans-serif;
}

html{
    font-size: 62.5%;
}

body{
    font-size: 1.6rem;
}

a{
    text-decoration: none;
    color: inherit;
}

/* wrapper */
.wrapper{
    width: 100vw;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(231deg, rgba(22, 6, 40, 1) 0%,
     rgba(52, 28, 79, 1) 50%, 
     rgba(88, 7, 125, 1) 100%);
}

.container{
    width: 90%;
    max-width: 45rem;
}

.app-name{
    font-size: 3.2rem;
    font-weight: 600;
    color: var(--pl-white);
    opacity: 0.75;
    /* text-transform: uppercase; */
    /* letter-spacing: 2px; */
    text-align: center;
    line-height: 1.2;
    padding-top: 30px;
}

/* display container */
.display-container{
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--dk-violet);
    padding: 2.5rem 2.5rem 2rem;
    border-radius: 1.6rem;
    border-bottom: 0.5rem solid var(--lt-violet2);
    margin: 1.6rem 0;
}

input.display{
    width: 100%;
    font-size: 2.4rem;
    font-weight: 600;
    color: var(--vb-yellow);
    background: transparent;
    /* line-height: 3rem; */
    letter-spacing: 1px;
    border: none;
    outline: none;
}

input.display::placeholder{
    color: var(--vb-yellow);
    text-transform: uppercase;
    opacity: 0.65;
}

button.copy-btn{
    border: none;
    outline: none;
    background: transparent;
    /* all: unset; */
    cursor: pointer;
    position: relative;
}

button.copy-btn .copy-img{
    width: 2.4rem;
    height: 2.4rem;
}

button.copy-btn .copy-tooltip{
    position: absolute;
    top: -3.7rem;
    left: -3rem;
    color: var(--vb-yellow);
    background-color: var(--vb-violet2);
    font-size: 2rem;
    padding: 0.5rem 1rem;
    border-radius: 1.6rem;
    transform-origin: bottom;
    transition: all 250ms ease-in-out;
    opacity: 0;
    transform: scale(0);
}

button.copy-btn .copy-tooltip.active{
    opacity: 1;
    transform: scale(1);
}

/* input container */
.input-container{
    padding: 3.2rem;
    color: var(--pl-white);
    background-color: var(--dk-violet);
    border-bottom: 0.5rem solid var(--lt-violet2);
    border-radius: 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 2.8rem;
}

/* length container */
.length-container{
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.length-container p:first-child{
    font-size: 2.4rem;
}

.length-container p:last-child{
    font-size: 2.4rem;
    font-weight: 600;
    color: var(--vb-yellow);
}

/* slider */
.slider{
    appearance: none;
    width: 100%;
    height: 1.2rem;
    border-radius: 1.6rem;
    border: none;
    outline: none;
    cursor: pointer;
    background: var(--lt-violet);
    background-image: linear-gradient(var(--vb-violet), var(--vb-violet));
    background-repeat: no-repeat;
    /* background-size: 50%; */
    position: relative;
    z-index: 1;
}

/* 
.slider:focus{
    outline: 0.3rem solid var(--vb-yellow);
    border: 0.3rem solid var(--vb-yellow);
} */

.slider::-webkit-slider-thumb{
    appearance: none;
    width: 3.2rem;
    height: 3.2rem;
    border-radius: 50%;
    background: var(--vb-yellow);
    cursor: pointer;
    /* margin-top: -3px; */
    /*You need to specify a margin in Chrome, but in Firefox and IE it is automatic */
    box-shadow: 0px 0px 20px 0px rgba(255, 229, 61, 0.50);
    transition: all 100ms ease-in;
    position: relative;
    z-index: 10;
}

.slider::-webkit-slider-thumb:hover {
    outline: 2px solid var(--vb-yellow);
    background-color: var(--dk-violet);
    box-shadow: 0px 0px 25px 2px rgba(255, 229, 61, 0.80);
}

.slider::-moz-range-thumb {
    appearance: none;
    width: 3.2rem;
    height: 3.2rem;
    border-radius: 50%;
    background: var(--vb-yellow);
    cursor: pointer;
    /* margin-top: -3px; */
    /*You need to specify a margin in Chrome, but in Firefox and IE it is automatic */
    box-shadow: 0px 0px 20px 0px rgba(255, 229, 61, 0.50);
    transition: all 100ms ease-in;
    position: relative;
    z-index: 10;
}

.slider::-moz-range-thumb:hover {
    outline: 2px solid var(--vb-yellow);
    background-color: var(--dk-violet);
    box-shadow: 0px 0px 25px 2px rgba(255, 229, 61, 0.80);
}

/* checkboxes */
.checkbox-container{
    display: flex;
    align-items: center;
    column-gap: 1.6rem;
    margin: 1.6rem 0;
}

.checkbox-container input[type="checkbox"]{
    appearance: none;
    width: 2rem;
    height: 2rem;
    border: 0.1rem solid var(--vb-cyan);
    border-radius: 0.5rem;
    cursor: pointer;
    position: relative;
}

.checkbox-container input[type="checkbox"]:checked{
    background-color: var(--vb-cyan);
}

/* tick symbol */
.checkbox-container input[type="checkbox"]:checked::before{
    /* \2713 */
    content: '✔'; 
    position: absolute;
    top: -0.35rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--dk-text);
    font-size: 1.7rem;
    font-weight: 600;
}

.checkbox-container label{
    font-size: 2rem;
    text-transform: capitalize;
    letter-spacing: 0.75px;
}

/* strength container */
.strength-container{
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.strength-container p{
    font-size: 2.4rem;
}

.strength-container .indicator{
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 50%;
    transition: all 250ms ease-in-out;
}

/* generate button */
#generateButton{
    width: 100%;
    font-size: 2rem;
    font-weight: 600;
    padding: 1.6rem 0;
    border: none;
    border-radius: 1.2rem;
    border-bottom: 0.5rem solid var(--vb-yellow);
    color: var(--vb-yellow);
    background-color: var(--vb-violet);
    text-transform: uppercase;
    letter-spacing: 0.1rem;
}


/* media queries */
@media (max-width: 450px){
    .app-name{
        font-size: 2.5rem;
    }

    .display-container{
        padding: 2rem 2.5rem 1.5rem;
    }

    input.display{
        font-size: 2rem;
    }

    .slider::-webkit-slider-thumb{
        width: 2.7rem;
        height: 2.7rem;
    }

    .slider::-moz-range-thumb {
        width: 2.7rem;
        height: 2.7rem;
    }

    .slider::-webkit-slider-thumb:hover {
        box-shadow: 0px 0px 10px 4px rgba(255, 229, 61, 0.80);
    }

    .slider::-moz-range-thumb:hover {
        box-shadow: 0px 0px 10px 4px rgba(255, 229, 61, 0.80);
    }
}

@media (max-width: 390px){
    .display-container{
        padding-left: 2rem;
        padding-right: 2rem;
    }

    .input-container{
        padding-left: 2rem;
        padding-right: 2rem;
    }

    input.display{
        font-size: 1.6rem;
    }
}

@media (max-width: 350px){
    .app-name{
        font-size: 2rem;
    }
    .checkbox-container label {
        font-size: 1.7rem;
    }

    input.display{
        font-size: 1.4rem;
    }

    #generateButton {
        font-size: 1.7rem;
    }
}