body {
    font-family: 'Arial', sans-serif;
    background: #1a1a2e;
    color: #eee;
    text-align: center;
    padding: 10px;
    margin: 0;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    color: #ffd700;
    font-size: 1.8em;
    margin: 10px 0;
}

#roulette {
    border: 5px solid #ffd700;
    border-radius: 50%;
    margin: 10px auto;
    display: block;
    width: 95%;
    height: auto;
    max-width: 500px;
}

#result {
    font-size: 1.5em;
    margin: 15px 0;
    font-weight: bold;
    color: #ffd700;
    min-height: 40px;
    padding: 0 10px;
}

#spin-btn {
    background: #ffd700;
    color: #1a1a2e;
    font-size: 1.3em;
    font-weight: bold;
    padding: 15px 40px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.1s;
    margin-bottom: 20px;
}

#spin-btn:hover {
    transform: scale(1.05);
    background: #ffed4a;
}

#spin-btn:active {
    transform: scale(0.95);
}

/* Mobile optimization */
@media (max-width: 600px) {
    body {
        padding: 5px;
    }

    .container {
        max-width: 100%;
        padding: 0 10px;
    }

    h1 {
        font-size: 1.4em;
        margin: 5px 0;
    }

    #roulette {
        width: 90%;
        margin: 5px auto;
    }

    #result {
        font-size: 1.2em;
        margin: 10px 0;
    }

    #spin-btn {
        font-size: 1.1em;
        padding: 12px 30px;
        width: 80%;
        max-width: 250px;
    }
}

@media (max-width: 400px) {
    h1 {
        font-size: 1.2em;
    }

    #roulette {
        width: 85%;
    }

    #result {
        font-size: 1em;
    }

    #spin-btn {
        font-size: 1em;
        padding: 10px 25px;
    }
}