:root {
    --first-color: #00796b;
    --second-color:#ff5722;
    --third-color:#004d40;
    --white-color: #fff;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #eaeff2;
}

.main {
    max-width: 700px;
    margin: 40px auto;
    padding: 20px;
    background-color: var(--white-color);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    position: relative;
}

.main h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--first-color);
    text-align: center;
    margin-bottom: 15px;
}

.main .controls {
    text-align: center;
    margin-bottom: 20px;
}

.main .controls p {
    font-size: 18px;
    color: #555;
    margin-bottom: 12px;
}

.main .controls select {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    border: 2px solid var(--first-color);
    border-radius: 4px;
    outline: none;
    background-color: #e0f2f1;
}

.main .message {
    text-align: center;
    font-size: 16px;
    color: var(--first-color);
    margin-bottom: 20px;
    font-weight: 700;
}

.main .message .level,
.main .message .seconds {
    font-weight: 700;
    color: var(--second-color);
    text-transform: capitalize;
    font-size: 18px;
}

.main .start-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: var(--first-color);
    color: var(--white-color);
    font-size: 18px;
    font-weight: 700;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: background-color 0.3s;
}

.main .start-btn:hover {
    background-color: var(--third-color);
}

.main .word-display {
    text-align: center;
    font-weight: bold;
    font-size: 60px;
    color: var(--second-color);
    user-select: none;
    margin-bottom: 10px;
}

.main input[type="text"] {
    display: none;
    width: 100%;
    padding: 10px;
    font-size: 18px;
    border: 2px solid var(--first-color);
    border-radius: 4px;
    outline: none;
    margin-bottom: 20px;
    background-color: #e0f2f1;
    text-align: center;
    caret-color: var(--first-color);
}

.main .upcoming-words {
    text-align: center;
    margin-top: 20px;
}

.main .upcoming-words div {
    display: inline-block;
    background-color: #b2dfdb;
    color: var(--first-color);
    font-weight: 700;
    margin: 4px;
    padding: 8px;
    border-radius: 4px;
}


.main .stats {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    color: #555;
    font-size: 16px;
    font-weight: bold;
}

.main .how-to-play-btn {
    padding: 8px 16px;
    background-color: var(--first-color);
    color: var(--white-color);
    font-size: 16px;
    font-weight: 700;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 20px;
    transition: background-color 0.3s;
}

.main .how-to-play-btn.disabled {
    background-color: rgba(0, 0, 0, 0.1); 
    color: rgba(255, 255, 255, 0.5); 
    cursor: not-allowed;
    pointer-events: none;
}

.main .how-to-play-btn:hover {
    background-color: var(--third-color);
}

.how-to-play-div {
    max-width: 600px;
    margin: 40px auto;
    padding: 20px;
    background-color: var(--white-color);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    display: none;
}

.how-to-play-div h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--first-color);
    text-align: center;
    margin-bottom: 20px;
}

.how-to-play-div ul {
    margin: 20px;
}

.how-to-play-div .close-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: var(--first-color);
    color: var(--white-color);
    font-size: 18px;
    font-weight: 700;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.how-to-play-div .close-btn:hover {
    background-color: var(--third-color);
}

.result-main {
    display: none;
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    background-color: var(--white-color);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.result-main h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.result-main p {
    font-size: 18px;
    margin-bottom: 20px;
}

.result-main p span{
    font-weight: bold;
    color: var(--first-color);
    font-size: 20px;
}

.result-main .play-again-btn {
    padding: 10px 20px;
    font-size: 16px;
    background-color: var(--first-color);
    color: var(--white-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.result-main .play-again-btn:hover {
    background-color: var(--third-color);
}