:root {
    --cream: #ffd775;
    --reddish: #ff6992;
    --teal: #83e1fb;
    --orange: #ffac84;
    --green: #80ed99;
    --daruma: url(./images/daruma.png);
    --money-cat: url(./images/money-cat.png);
    --tanuki: url(./images/tanuki.png);
    --wu-lou: url(./images/wu-lou.png);
    --omamori-blue: url(./images/omamori-blue.png);
}

/* general */

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 1rem;
    background-color: #f8f3ef; 
    text-align: center;
    font-family: 'manrope', sans-serif;
    color: #495057; 
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

button {
    cursor: pointer;
    font-family: inherit;
    color: inherit;
}

a {
    color: blueviolet;
    font-weight:600;
    &:hover {
        background-color: var(--cream);
    }
} 

h1 {
    color: blueviolet;
    font-size: 2.5rem;
    text-transform: capitalize; 

    span {
        color: var(--orange);
    }
}

/* alert message */
.offline-alert {
    background-color: #e9ecef;
    box-shadow: .4rem .3rem 10px #4950572d;
    border-radius: .5rem;
    padding: 1rem;
    font-size: .9rem;
    position:fixed;
    left: 50%;
    top: -50%;
    width: 90%;
    max-width: 40rem;
    transform: translateX(-50%);
    transition: .5s;
}

.offline-alert.active {
    top: 5%;
}

/* loader */
.loader {
    text-align: center;
    padding: .5rem;
    font-size: .9rem;
    display: none;
    width: 100%;
    height: 70vh;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.dots {
    display: flex;
    justify-content: center;
    gap: .3rem;

    span {
        width: .6rem;
        aspect-ratio: 1;
        border-radius: 50%;
        background-color: var(--color);
        animation: bounce 1.5s var(--delay) infinite linear;
        transform-origin: center bottom;
    }
}

.loader.active {
    display: flex; 
}

@keyframes bounce {
  0% {
    transform: translateY(0) scaleY(1) scaleX(1);
  }

  30% {
    transform: translateY(-10px) scaleY(1.2) scaleX(0.8); /* stretch upward */
  }

  50% {
    transform: translateY(0) scaleY(0.6) scaleX(1.4); /* squash on impact */
  }

  70% {
    transform: translateY(-3px) scaleY(1.1) scaleX(0.9); /* smaller bounce */
  }

  100% {
    transform: translateY(0) scaleY(1) scaleX(1); /* reset */
  }
}

/* error message */

.error-message {
    min-height: 70vh;
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;


    img {
        min-width: 300px; 
        max-width: 500px;
        width: 90%;
    }
}

.error-message.active {
    display: flex;
}

/* intro */
.intro {
    text-align: center;
    display: none;
    opacity: 0;
 
    p {
        font-size: 1.3rem;
    }
}

.intro.active {
    display: block;
    opacity: 1;
}

.levels {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-block-start: 4rem;

    button {
        padding: 1rem;
        width: 90%;
        height: 7rem;
        font-size: 4rem;
        text-align: end;
        text-transform: uppercase;
        background-color: var(--bg); 
        background-image: var(--img);   
        background-position: 0%;
        background-repeat: no-repeat;
        background-size: 50%; 
        border: none;
        border-radius: .3rem;
        transition: .3s;
        color: blueviolet;
        color: whitesmoke;
        font-family: 'anton', sans-serif;
 
        &:nth-of-type(4) {
            background-position: 0% 5%;
        }

        &:hover {
            transform: scale(1.04);
            color: blueviolet;
        }
    }
}

#more-info-btn {
    margin-block: 1.5rem 2rem;
    border: none;
    background-color: transparent;
    text-decoration: underline;
    vertical-align: middle;
    transition: .3s;
     
    img {
        width: 1rem;
        vertical-align: middle;
    }

    &:hover {
        color: blueviolet;
    }
}

.more-info-modal {    
    position: fixed;
    left: 0;
    bottom: -200%;
    background-color: #e9ecef; 
    border-radius: 1rem 1rem 0 0;
    padding: 1rem;
    color: rgb(79, 79, 79);
    transition: .5s;
    width: 100%;
    
    p {
        max-width: 60rem;
        margin-inline: auto;
        font-size: 1rem;
    }

    button {
      border: none;
      background-color: transparent;
      text-decoration: underline;  
      transition: .3s;

      &:hover {
        color: blueviolet;
      }
    }
}


.more-info-modal.active {
    bottom: 0%;
    left: 0;
}

/* quiz */
.quiz {
    display: none;
    padding: 1rem;
    border-radius: .5rem;
    background-color: floralwhite;
    max-width: 40rem;
    margin-inline: auto;
    margin-block: 3rem;
    background: url(./images/question-mark.png), url(./images/question-mark-2.png);
    background-repeat: no-repeat;
    background-position: 150% 100%, -40% -10%; 
    background-size: 60%, 50%;
    box-shadow: .3rem .3rem 10px #44444450; 

    header p {
        text-transform: uppercase;
        margin-top: 0;
        font-weight: bold;
        color: #444444;

        span {
            color: blueviolet;
        }
    }
}

.question-details {
    text-align: center;
    padding-inline: 2rem;
    margin-inline: auto;
    background-color: #e9ecef65;
    border-radius: .3rem;
    max-width: 30rem;
}

.kanji {
    font-size: 5rem;
    text-align: center;
}

.readings {
    display: flex;
    justify-content: space-between;
    margin-inline: auto;
    font-weight: bold;
    font-size: .9rem;
    gap: 1rem;

    p {
        display: flex;
        flex-direction: column;
        width: 50%;
    }
}

.kun {
    color: var(--teal);
}

.on {
    color: var(--orange);
}

.quiz.active {
    display: block;
}

.answers {
    margin-block-start: 2rem;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    max-width: 30rem;
    margin-inline: auto;
    
    button {
        font-size: 1.1rem;
        border: none; 
        padding: .5rem 1rem;
        border-radius: .3rem;
        color: #212121;
        background-color: #e9ecef;
        transition: .1s linear;

        &:hover {
            background-color: var(--cream);
        }
    }
}

.quiz footer {
    max-width: 10rem;
    margin-inline: auto;
    margin-block: 1rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-weight: bold;
    background-color: #ffe5da;
    padding: .5rem 1rem;
    border-radius: 1rem;
}

.correct-score {
    color: white;
    font-weight: bold;
    aspect-ratio: 1;
    width: 1.4rem;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background-color: var(--green);
}

.incorrect-score {
    color: white;
    background-color: var(--reddish);
    font-weight: bold;
    border-radius: 50%;
    aspect-ratio: 1;
    width: 1.4rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

button.correct {
    background-color: var(--green);
    animation: rightAnswerAnimation .8s linear;
    &:hover {
        background-color: var(--green);
    }
}

button.incorrect {
    background-color: var(--reddish);
    animation: wrongAnswerAnimation .8s linear; 
    &:hover {
        background-color: var(--reddish);
    }
}

@keyframes wrongAnswerAnimation {
    10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% {
        transform: translateX(3px);
    }

    5%, 15%, 25%, 35%, 45%, 55%, 65%, 75%, 85%, 95% {
        transform: translateX(-3px);
    }

    100% {
        transform: translateX(0);
    }
}

@keyframes rightAnswerAnimation {
    30% {
        transform: scale(.9);
    }

    60% {
        transform: scale(1.04);
    }

    100% {
        transform: scale(1);
    }
}

/* results */
.results {
    display: none;
    background-color: white;
    padding-bottom: 1.5rem;
    border-radius: .5rem;
    max-width: 25rem;
    margin-inline: auto;
    margin-block: 3rem;
    box-shadow: .3rem .3rem 10px #44444450; 

}

.result-message {
    background: url(./images/confetti.png) no-repeat;
    background-size: cover;
    padding-inline: 1rem;

    img {
        width: 10rem; 
    }

    h3 {
        margin-block: .3rem;
    }

    .score {
        margin-block: 0; 
        color: blueviolet;
    }

    .message {
        margin-block: .1rem 2rem;
    }

}

.play-again-btn {
    border: none;
    background-color: transparent;
    text-decoration: underline;
    color: var(--orange); 
    font-weight: bold;
    font-size: 1.1rem;

    &:hover {
        color: var(--teal);
    }
}

.results.active {
    display: block;
}

footer {
    font-size: .8rem;
}


/* media queries */
@media screen and (min-width: 600px) {
    .levels {
        display: grid;
        grid-template-columns: repeat(4, calc(25% - .75rem));
        grid-template-rows: repeat(2, 10rem);
        gap: 1rem;
        max-width: 50rem;
        margin-inline: auto;

        button {
            width: 100%;
            height: 100%;
        }
    
        button:first-of-type, 
        button:nth-of-type(2),
        button:nth-of-type(4) {
            grid-column: span 2;
        }

        button:nth-of-type(3),
        button:nth-of-type(5) {
            background-size: 80%;
            background-position: -130%;
        }
    }

    .quiz {
        background: url(./images/question-mark.png), url(./images/question-mark-2.png);
        background-repeat: no-repeat;
        background-position: 150% 200%, -40% -30%; 
        background-size: 60%, 50%;
    }
}

@media (prefers-reduced-motion: reduce) {
  .dots span,
  button.correct,
  button.incorrect {
    animation: none !important;
  }
}