body {
    margin: 0;
    background: #000;
    overflow: hidden;
    font-family: Arial, sans-serif;
}

canvas {
    display: block;
}

/* 鍏ュ彛椤甸潰鏍峰紡 */
#entryScreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #000000, #1a0033);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    color: #fff;
    transition: opacity 0.5s ease-out;
}

#entryText {
    font-size: 1.7rem;
    text-align: center;
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 105, 180, 0.7),
        0 0 20px rgba(255, 105, 180, 0.5),
        0 0 30px rgba(255, 105, 180, 0.3);
    animation: pulse 1.5s infinite alternate;
    margin-bottom: 20px;
}

@keyframes pulse {
    from {
        opacity: 0.7;
        transform: scale(0.98);
    }

    to {
        opacity: 1;
        transform: scale(1.02);
    }
}

#entryHint {
    font-size: 1rem;
    opacity: 0.7;
    text-align: center;
    margin-top: 30px;
}

/* 鏄熸槦鑳屾櫙鍔ㄧ敾 */
.stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.star {
    position: absolute;
    background-color: #fff;
    border-radius: 50%;
    animation: twinkle 1s infinite alternate;
}

@keyframes twinkle {
    from {
        opacity: 0.2;
    }

    to {
        opacity: 0.8;
    }
}

/* 3D鍦烘櫙瀹瑰櫒鏍峰紡 */
#sceneContainer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in;
}

/* 娓愭樉瑕嗙洊灞� */
#fadeOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: black;
    opacity: 1;
    z-index: 999;
    pointer-events: none;
    transition: opacity 1.2s ease-out;
}

.floating-button {
    z-index: 10001;
    position: fixed;
    bottom: 10vh;
    right: 0px;
    background-color: #00000061;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px 0px 0px 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    opacity: 0.5;
    text-transform: uppercase;
    letter-spacing: 1px;
    /*z-index: 999;*/
    transition: transform 0.3s ease-in-out;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.2);
}

.floating-button a {
    color: inherit;
    text-decoration: none;
}

.vertical-text {
    writing-mode: vertical-rl;
    text-align: center;
    margin-left: -13px;
    padding: 5px;
}