body {
    font-family: 'Times New Roman';
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
}

.center-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 430px;
    padding: 0px;
    box-sizing: border-box;
}

h1 {
    font-size: 1.5rem;
    color: #000000;
    text-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    margin: 0 0 15px 0;
    text-align: center;
}

.game-area {
    position: relative;
    width: 430px;
    height: 460px;
    margin: 0 auto;
}

#gameCanvas {
    border: 1px solid #ddd;
    background-color: #000000;
    border-radius: 0px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    display: none;
    width: 100%;
    height: 100%;
}

#startScreen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.8);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

#startButton {
    padding: 0.75rem 1.5rem;
    font-size: 0.8rem;
    color: white;
    background-color: #0008ff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-weight: bold;
}

#startButton:hover {
    background-color: #09ff00;
}

.game-info {
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 15px;
    color: black;
    font-size: 0.8rem;
}

.game-info div {
    background-color: #11ff00;
    padding: 0.4rem;
    border-radius: 5px;
    min-width: 70px;
    text-align: center;
}

#controlsContainer {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 15px;
    width: 100%;
}

#speedControl {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #000;
    font-size: 0.7rem;
    width: 100%;
    justify-content: center;
}

#speedSlider {
    width: 150px;
}

#speedValue {
    font-size: 0.8rem;
    color: #000;
    min-width: 20px;
    display: inline-block;
    text-align: center;
}

.hidden {
    display: none !important;
}

.game-over-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: red;
    font-size: 2rem;
    text-align: center;
    text-shadow: 0 0 5px black;
    z-index: 5;
    width: 100%;
}

.win-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: green;
    font-size: 2rem;
    text-align: center;
    text-shadow: 0 0 5px black;
    z-index: 5;
    width: 100%;
}

@media (max-width: 460px) {
    .center-container {
        width: 100%;
        padding: 10px;
    }
    
    .game-area {
        width: 100%;
        height: auto;
        aspect-ratio: 430/460;
    }
    
    h1 {
        font-size: 1.2rem;
    }
    
    .game-info {
        font-size: 0.6rem;
    }
    
    #startButton {
        padding: 0.5rem 1rem;
        font-size: 0.7rem;
    }
    
    #speedControl {
        flex-direction: column;
        gap: 0.3rem;
    }
    
    #speedSlider {
        width: 120px;
    }
    
    .game-over-text, .win-text {
        font-size: 1.5rem;
    }
}