body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    background: url('background_pc.jpg') no-repeat center center fixed;
    background-size: cover;
}

.container {
    position: relative;
    width: 100%;
    height: 100%;
}

.logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: auto;
}

.start-button {
    position: absolute;
    top: 70%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 10px 20px;
    font-size: 24px;
    background-color: #FFD700;
    border: none;
    cursor: pointer;
    border-radius: 10px;
}

.start-button:hover {
    background-color: #FFA500;
}

.icon {
    width: 50px;
    height: 50px;
    position: absolute;
}

.github-icon {
    bottom: 20px;
    left: 20px;
}

.youtube-icon {
    bottom: 20px;
    right: 20px;
}

.game-container {
    position: relative;
}

canvas {
    background-color: rgba(0, 0, 0, 0.8);
    border: 5px solid #555;
}

.powerup-button {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.powerup-button img {
    width: 50px;
    height: 50px;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
}

.overlay-content {
    text-align: center;
    color: #fff;
}

.hidden {
    display: none;
}

.stage-select-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.stages {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    padding: 20px;
}

.stage-button {
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    background-color: #FFD700;
    border: none;
    border-radius: 5px;
}

.stage-button:hover {
    background-color: #FFA500;
}