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

body {
    background-color: #e9ecef;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 10px;
}

.container {
    text-align: center;
    width: 100%;
    max-width: 500px;
    background: #fff;
    border: 1px solid #ced4da;
    border-radius: 15px;
    box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.1);
    padding: 20px 15px;
    color: #343a40;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: auto;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

h1 {
    font-size: 24px;
    margin-bottom: 10px;
    font-weight: bold;
    text-transform: uppercase;
}

.subtitle, #hint, #message {
    font-size: 14px;
    margin-bottom: 10px;
    color: rgba(52, 58, 64, 0.7);
}

#hint {
    color: #007bff;
    font-weight: 600;
}

#forcaCanvas {
    display: block;
    margin: 10px auto;
    background: #fff;
    border-radius: 10px;
    width: 100%;
    max-width: 250px;
    aspect-ratio: 1;
}

.word-display {
    font-size: 20px;
    letter-spacing: 2px;
    margin: 10px 0;
    font-weight: bold;
}

#restartBtn {
    background: #007bff;
    color: white;
    font-size: 14px;
    padding: 8px 16px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
    margin-top: 10px;
    display: inline-block;
}

#restartBtn:hover {
    background: #0056b3;
    transform: scale(1.05);
}

.letters {
    display: grid;
    grid-template-columns: repeat(13, 1fr);
    gap: 5px;
    margin-top: 10px;
    width: 100%;
    max-width: 400px;
}

.letters button {
    background: #6c757d;
    color: white;
    font-size: 14px;
    padding: 6px 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
}

.letters button:hover {
    background: #545b62;
    transform: scale(1.1);
}

.letters button:disabled {
    background: #adb5bd;
    cursor: not-allowed;
}

.letters button.active {
    background: #28a745;
    transform: scale(1.1);
}

@media (min-width: 768px) {
    .container {
        max-width: 600px;
    }
}

@media (max-width: 600px) {
    h1 {
        font-size: 20px;
    }

    .subtitle, #hint, .word-display, #message {
        font-size: 12px;
    }

    .letters button {
        font-size: 12px;
        padding: 4px 8px;
    }

    #restartBtn {
        font-size: 12px;
        padding: 6px 12px;
    }
}

@media (max-width: 400px) {
    h1 {
        font-size: 18px;
    }

    .subtitle, #hint, .word-display, #message {
        font-size: 10px;
    }

    .letters button {
        font-size: 10px;
        padding: 3px 6px;
    }

    #restartBtn {
        font-size: 10px;
        padding: 5px 10px;
    }
}