:root {
    --bg-color: #393939;
    --card-color: #565656;
    --matches-color: #404040;
    --flipped-card-color: #fffaf6;
    --header-color: #000;
    --text-color: #fff;
    --button-text-color: #1b1b1b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Paytone One', sans-serif;
    position: relative;
}

.flx-ctr {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

heading {
    width: 100%;
    display: flex;
    justify-content: space-evenly;
    background: linear-gradient(
        180deg,
        var(--header-color) 0%,
        var(--bg-color) 100%
        );
    position: absolute;
    top: 0;
    padding-top: 2vmin;
}

.heading-content {
    display: flex;
    align-items: flex-end;
}

.title-flx > a {
    font-size: 5vmin;
    text-decoration: none;
    color: var(--text-color);
}

.title-flx > a > span {
    margin-right: 2vmin;
    font-family: 'Noto Serif TC', serif;
}

.subtitle {
    font-family: 'Varela Round', sans-serif;
    font-size: 1.8vmin;
    letter-spacing: .3vmin;
    padding-top: 1.5vmin;
}

.mini-flx {
    padding: 0 3vmin 0 3vmin;
}

.mini-flx > p {
    font-family: 'Varela Round', sans-serif;
    font-size: 1.5vmin;
    letter-spacing: .2vmin;
}

#turn-count,
#remaining-count {
    padding: 1vmin 0;
    font-family: 'Paytone One', sans-serif;
    font-size: 2vmin;
    letter-spacing: .3vmin;
}

.small-study-mode,
.small-reset {
    display: none;
}

#reset,
#play-again,
#my-list-btn {
    cursor: pointer;
    outline: none;
    font-family: 'Paytone One', sans-serif;
    font-size: 1.4vmin;
    letter-spacing: .1vmin;
    height: 4vmin;
    width: 12vmin;
    border-radius: 1vmin;
    border: none;
    box-shadow: 0 0 .3vmin .2vmin rgba(255, 255, 255, .2);
    background-color: var(--bg-color);
    color: var(--text-color);
}

#reset {
    margin-top: 2vmin;
}

.main {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 5vmin;
}

.center,
.right,
.left {
    margin-top: 12vmin;
}

.left-block {
    background-color: var(--matches-color);
    border-radius: 2vmin;
    width: 20vmin;
    height: auto;
    padding: 2vmin;
}

.left-block > h2 {
    font-size: 2.5vmin;
    padding-bottom: 1vmin;
}

.deck-btns > h3 {
    margin-top: 1.5vmin;
    letter-spacing: .1vmin;
    color: var(--text-color);
}

.deck-btn {
    cursor: pointer;
    outline: none;
    font-family: 'Paytone One', sans-serif;
    font-size: 1.8vmin;
    letter-spacing: .1vmin;
    height: 4vmin;
    width: 15vmin;
    border-radius: .5vmin;
    border: none;
    margin-top: 1vmin;
    color: var(--button-text-color);
    box-shadow: .2vmin .2vmin .5vmin .4vmin rgba(0, 0, 0, .3);
    transition: 200ms ease-in-out;
}

.deck-btn:hover {
    transform: scale(1.2);
}

.active-deck {
    transform: scale(1.2);
    background-color: var(--flipped-card-color)!important;
}

#starter-btn {
    background-color: #a8dadc;
}
#numbers-btn {
    background-color: #e0fbfc;
}
#animals-btn {
    background-color: #fcd5ce;
}
#hobbies-btn {
    background-color: #fad2e1;
}
#school-btn {
    background-color: #fde2e4;
}
#travel-btn {
    background-color: #f9dcc4;
}
#adjectives-btn {
    background-color: #cbf3f0;
}
#emotions-btn {
    background-color: #fff1e6;
}
#create-deck {
    background-color: #b7efd0;
    margin-top: 4vmin;
    padding: 3vmin 0 3vmin 0;
}

.board {
    background-color: var(--bg-color);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(5, auto);
    gap: 1.5vmin;
    padding: .5vmin;
}

.board > div {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 14vmin;
    height: 14vmin;
    padding: 2vmin;
    border-radius: 1vmin;
    background-color: var(--card-color);
    color: var(--button-text-color);
    box-shadow: .2vmin .2vmin .5vmin .3vmin rgba(0, 0, 0, .4);
}

.grow {
    transition: 200ms ease-in-out;
}

.grow:hover {
    transform: scale(1.05);
    box-shadow: 0 0 .2vmin .2vmin rgba(255, 255, 255, 0.5);
}

.mild-grow {
    transition: 200ms ease-in-out;
}

.mild-grow:hover {
    transform: scale(1.02);
    box-shadow: 0 0 .2vmin .2vmin rgba(255, 255, 255, 0.5);
}

.reveal-card {
    animation: fade-in 500ms;
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.hide-card {
    transition: var(--card-color) 500ms;
}

.right > h2 {
    letter-spacing: .2vmin;
}

.match-board {
    background-color: var(--bg-color);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto;
    gap: .5vmin;
    width: auto;
    padding: 2vmin 0 2vmin 0;
}

.my-list-desc {
    font-family: 'Varela Round', sans-serif;
    text-align: center;
    font-size: 1.2vmin;
    letter-spacing: .1vmin;
    width: 25vmin;
    margin-top: 1.2vmin;
}

.match-board > div {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 10vmin;
    height: 5.5vmin;
    padding: 1vmin;
    font-family: 'Varela Round', sans-serif;
    font-size: 1.7vmin;
    border-radius: .5vmin;
    background-color: var(--matches-color);
    color: var(--button-text-color);
}

#my-list-btn {
    height: 3.5vmin;
    width: 13vmin;
}

/* ---- Shared Modal Styles ---- */

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);  
    transition: 200ms ease-in-out;
    border: 1px solid black;
    border-radius: 1vmin;
    z-index: 10;
    width: 50vmin;
    max-width: 80%;
    padding: 2vmin;
}

.close-btn {
    position: absolute;
    top: 2vmin;
    right: 2vmin;
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
    font-size: 4vmin;
    padding-right: 1vmin;
}

.modal-content {
    gap: 2vmin;
    padding: 5vmin;
}

/* ---- Cleared Board Modal ---- */

#cleared-modal {
    background-color: white;
    color:  var(--button-text-color);
}

#cleared-modal.active {
    transform: translate(-50%, -50%) scale(1); 
}

#cleared-close-btn {
    color:  var(--button-text-color);
}

.cleared-title {
    font-size: 5vmin;
    text-align: center;
}

.cleared-subtitle {
    font-family: 'Varela Round', sans-serif;
    font-size: 2.1vmin;
    line-height: 3.2vmin;
    text-align: center;
} 

#play-again {
    margin-top: 5vmin;
}

#overlay {
    position: fixed;
    opacity: 0;
    transition: 200ms ease-in-out;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, .5);
    pointer-events: none;
}

#overlay.active {
    opacity: 1;
    pointer-events: all;
}

/* ---- Study Mode Toggle ---- */

.toggle-settings {
    padding-left: 2vmin;
}

.toggle-text {
    font-family: 'Varela Round', sans-serif;
    font-size: 1.5vmin;
    margin-bottom: -20%;
}

input[type="checkbox"].toggle {
    opacity: 0;
    left: -9999px;
}

input[type="checkbox"].toggle + label {
    display: flex;
    align-items: center;
    position: relative;
}

input[type="checkbox"].toggle + label::before {
    content: '';
    width: 6.2vmin;
    height: 3.25vmin;
    background-color: var(--text-color);
    border-radius: 2vmin;
    margin-right: 1vmin;
    transition: background-color, transform 200ms ease-in-out;
}

input[type="checkbox"].toggle + label::after {
    content: '';
    width: 2.9vmin; 
    height: 2.9vmin;
    background-color: var(--card-color);
    border-radius: 2vmin;
    margin-right: 1vmin;
    position: absolute; 
    left: .2vmin; 
    transition: background-color, transform 200ms ease-in-out;
}

input[type="checkbox"].toggle:checked + label::after {
    background-color: var(--bg-color);
    transform: translateX(100%);
}

input:focus {
    border: 2px solid #83C5BE;
}

/* ---- Study Mode Modal ---- */

#study-modal {
    background-color: var(--matches-color);
    color: var(--text-color);
}

#study-modal.active {
    transform: translate(-50%, -50%) scale(1); 
}

#study-close-btn {
    color: white;
}

.study-title {
    font-size: 5vmin;
    padding-bottom: 1vmin;
}

.study-text {
    font-family: 'Varela Round', sans-serif;
    font-size: 3vmin;
    line-height: 4.7vmin;
    text-align: center;
} 

.study-text > ul {
    list-style: none;
}

/* ---- My List Modal ---- */

#my-list-modal {
    background-color: var(--matches-color);
    color: var(--text-color);
}

#my-list-modal.active {
    transform: translate(-50%, -50%) scale(1);
}

#my-list-close-btn {
    color: white;
}

.my-list-title {
    font-size: 4vmin;
    padding-bottom: 1vmin;
}

.my-list-text {
    font-family: 'Varela Round', sans-serif;
    font-size: 2vmin;
    line-height: 3vmin;
    text-align: center;
} 

.my-list-text > ul {
    list-style: none;
}

/* ---- Create Deck Modal ---- */

#create-modal {
    background-color: white;
    color:  var(--button-text-color);
    height: auto;
}

#create-modal.active {
    transform: translate(-50%, -50%) scale(1); 
}

#create-close-btn {
    color:  var(--button-text-color);
}

.create-modal-text {
    gap: 2vmin;
    padding-top: 1vmin;
}

.create-modal-title {
    font-size: 5vmin;
    text-align: center;
}

.create-modal-subtitle {
    font-family: 'Varela Round', sans-serif;
    font-size: 2.3vmin;
    line-height: 3.2vmin;
    text-align: center;
} 

#create-deck-form {
    margin-top: 4vmin;
}

.form-fields {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

input[type='text'] {
    font-family: 'Varela Round', sans-serif;
    font-size: 1.5vmin;
    padding: 1vmin;
    margin: 0 .7vmin 0 0;
    width: 15vmin;
    border: .2vmin solid #b7efd0;
    border-radius: 1vmin;
}

input:focus {
    outline: none;
    border: .3vmin solid #b7efd0;
}

.color-picker {
    gap: .5vmin;
    margin-top: 1vmin;
}

.color-picker > label {
    font-size: 1.4vmin;
    letter-spacing: .1vmin;
    color: var(--bg-color);
}

.color-picker > input[type="color"] {
    cursor: pointer;
    border: none;
    border-radius: 50%;
    margin-left: .5vmin;
    width: 5vmin;
    height: 3vmin;
}

.add-card,
.play-btn {
    cursor: pointer;
    outline: none;
    font-family: 'Paytone One', sans-serif;
    font-size: 1.4vmin;
    letter-spacing: .1vmin;
    height: 3.6vmin;
    width: 10vmin;
    border-radius: 1vmin;
    border: none;
    box-shadow: 0 0 .3vmin .2vmin rgba(255, 255, 255, .2);
    background-color: var(--bg-color);
    color: var(--text-color);
}

.play-btn {
    margin-top: 2vmin;
}

.card-list {
    width: 42vmin;
    gap: .5vmin;
    margin-top: 3vmin;
    margin-bottom: 1vmin;
} 

#default-txt {
    font-family: 'Varela Round', sans-serif;
    font-size: 2.3vmin;
    line-height: 3.2vmin;
    text-align: center;
} 

.list-line {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: 100%;
    gap: .5vmin;
}

.num {
    font-family: 'Paytone One', sans-serif;
    color:  var(--button-text-color);
    font-size: 1.5vmin;
    font-weight: 600;
    width: 3vmin;   
    height: 3vmin;
}

.list-block {
    background-color: #ebeae8;
    color: var(--bg-color);
    font-family: 'Paytone One', sans-serif;
    font-size: 1.5vmin;
    font-weight: 600;
    width: 15vmin;   
    height: 3vmin;
    border-radius: 1vmin;
}

.remove-btn {
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
    fill: rgb(201, 0, 0);
    height: 2vmin;
    width: 2vmin; 
    margin-left: .5vmin;
}

/* ---- RESPONSIVE DESIGNS ---- */

.ham-container {
    padding-bottom: 2vmin;
}

.hamburger {
    position: relative;
    display: block;
    width: 5vmin;
    height: 5vmin;
    cursor: pointer;
    z-index: 100;

    appearance: none;
    background: none;
    outline: none;
    border: none;
}

.hamburger .bar,
.hamburger:after,
.hamburger:before {
    content: '';
    display: block;
    width: 100%;
    height: .6vmin;
    background-color: var(--text-color);
    margin: 1.2vmin 0;
    transition: 0.4s;

}

.hamburger.is-active:before {
    transform: rotate(-45deg) translate(-.9vmin, 1.6vmin);
}

.hamburger.is-active .bar {
    opacity: 0;
}

.hamburger.is-active:after {
    transform: rotate(45deg) translate(-1vmin, -1.7vmin);
}

.mobile-decks {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 3vmin;
    position: fixed;
    top: 0;
    left: -100%;
    width: 33%;
    min-height: 100vh;
    z-index: 98;
    padding-top: 17vmin;
    background: linear-gradient(
        180deg,
        var(--header-color) 0%,
        var(--card-color) 30%
        );    
    transition: 0.4s
}

#create-deck {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.mobile-decks.is-active {
    left: 0;
}
/* 
@media (min-width: 900px) {
    .mobile-decks {
        display: none;
    }

    .hamburger {
        display: none;
    }
}

@media (max-width: 899px) {

    .flx-ctr {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
    }

    .main {
        position: relative;
        margin-top: 13vmin;
    }

    .left {
        display: none;
    }

    .title-flx {
        margin-left: 6vmin;
    }

    .title-flx > a {
        font-size: 4vmin;
    }
    
    .title-flx > a > span {
        margin-right: 1vmin;
    }
    
    .subtitle {
        font-family: 'Varela Round', sans-serif;
        font-size: 1.3vmin;
        letter-spacing: .1vmin;
        padding-top: 1vmin;
    }

    .mini-flx {
        padding: 0 2vmin 0 2vmin;
    }
    
    .mini-flx > p {
        font-family: 'Varela Round', sans-serif;
        font-size: 1.5vmin;
        letter-spacing: .1vmin;
    }
    
    #turn-count,
    #remaining-count {
        padding: 1vmin 0;
        font-family: 'Paytone One', sans-serif;
        font-size: 1.5vmin;
        letter-spacing: .3vmin;
    }

    .toggle-settings {
        display: none;
    }

    .small-study-mode,
    .small-reset {
        display: block;
        cursor: pointer;
        outline: none;
        font-family: 'Paytone One', sans-serif;
        font-size: 1.3vmin;
        letter-spacing: .1vmin;
        height: 3.5vmin;
        width: 12vmin;
        border-radius: .8vmin;
        border: none;
        box-shadow: 0 0 .3vmin .2vmin rgba(255, 255, 255, .2);
        background-color: var(--bg-color);
        color: var(--text-color);
        margin-top: 1.3vmin;
        padding-bottom: .4vmin;
        transition: 200ms ease-in-out;
    }

    .small-study-mode:hover,
    .small-reset:hover {
        transform: scale(1.05);
        box-shadow: 0 0 .2vmin .2vmin rgba(255, 255, 255, 0.5);
    }
    
    .center,
    .right {
        margin-top: 10vmin;
    }

    .deck-btn {
        margin-top: 1.5vmin;
    }
}

@media (max-width: 600) {
    .ham-container {
        padding: 0 1vmin 3vmin 3vmin;
    }
    
    .hamburger {
        width: 20px;
        height: 20px;
    }
    
    .hamburger .bar,
    .hamburger:after,
    .hamburger:before {
        height: 2px;
        margin: 5px 0px;    
    }
    
    .hamburger.is-active:before {
        transform: rotate(-45deg) translate(-5px, 5px);
    }

    .hamburger.is-active:after {
        transform: rotate(45deg) translate(-5px, -5px);
    }
    
    .mobile-decks {
        width: 50%;
        padding-top: 17vmin;
    }

    .title-flx {
        margin: 0 0 0 2vmin;
    }

    .title-flx > a {
        font-size: 5vmin;
    }

    .subtitle {
        font-size: 2vmin;
        letter-spacing: .3vmin;
        padding-top: 1.5vmin;
    }

    .sm-flx {
        display: flex;
        flex-direction: column;
    }

    .row-flx {
        display: flex;
        flex-direction: row;
        padding: 0;
        margin: 0;
    }

} */