body {
    font-family: 'Montserrat', sans-serif;
    background-color: #282c34;
    color: #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.container {
    background-color: #3a3f47;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

h1 {
    color: #61dafb;
    margin-bottom: 10px;
    font-size: 2.2em;
}

.instructions {
    font-size: 1.1em;
    color: #bbbbbb;
    margin-bottom: 30px;
}

#gameArea {
    margin-bottom: 30px;
}

#instructionDisplay {
    font-size: 1.8em;
    font-weight: 700;
    margin-bottom: 20px;
    color: #e0e0e0;
}

.btn {
    padding: 12px 25px;
    font-size: 1.1em;
    font-weight: 700;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background-color: #4CAF50; /* Green for 'Done' button */
    color: white;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.1s ease;
}

.btn:hover {
    background-color: #388E3C;
    transform: translateY(-2px);
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2em;
    font-weight: 700;
    color: #e0e0e0;
    margin-top: 20px;
}

.score-display, .timer-display {
    font-size: 1.5em;
}

.back-btn {
    display: inline-block;
    margin-top: 20px;
    color: #61dafb;
    text-decoration: none;
    font-size: 1em;
    transition: color 0.2s ease;
}

.back-btn:hover {
    color: #21a1f1;
}