* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    background-color: black;
    color: #fff;
}

.bg-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: 0;
    pointer-events: none;
}

.return-btn {
    border-radius: 2px;
    position: fixed;
    right: 55px;
    bottom: 50px;
    width: 90px;
    height: 60px;
    border: none;
    vertical-align: bottom;
    background-color: transparent; 
    color: #fff;
    font-size: 2.6rem;
    cursor: pointer;
    z-index: 20;

    transition: opacity 0.2s ease, transform 0.2s ease;
}

.return-btn:hover {
    transform: scale(1.1);
    border: solid;
    border-color: rgb(255, 76, 0);
}

.container {
    height: 100vh;
    display: flex;
}

.page {
    display: none;
    margin-top: 10px;
    margin-left: 50px;
    padding: 80px 20px 100px;
    z-index: 10;
}

.page.active {
    display: flex;
}

.center {
    position: fixed;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    inset: 0;
    color: rgb(222, 222, 222);
    background: radial-gradient(
        circle at center,
        rgba(0,0,0,0.15) 0%,
        rgba(0,0,0,0.55) 60%,
        rgba(0,0,0,0.85) 100%
    );
    animation: shadow-flicker 2.5s infinite alternate;
}

@keyframes shadow-flicker {
    0%   { text-shadow: 3px 1px 2px rgb(150, 10, 10); }
    25%  { text-shadow: -3px 1px 2px rgb(150, 117, 10); }
    50%  { text-shadow: 3px 1px -2px rgb(150, 10, 131); }
    75%  { text-shadow: 3px -1px 2px rgb(10, 10, 150); }
    100% { text-shadow: -3px 1px -2px rgb(15, 150, 10); }
}

.catch {
    font-size: 3vw;
    font-weight: normal;
    transform: translateY(-7%);
}

.title {
    font-size: 0.8vw;
    font-weight: normal;
    transform: translateY(1%);
}

.release {
    font-size: 0.8vw;
    font-weight: normal;
    transform: translateY(4%);
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 5px 20px;
    text-align: center;
    background: rgb(0, 0, 0);
    color: rgba(255, 255, 255, 0.6);
    font-size: 11px;
    z-index: 1000;
    backdrop-filter: blur(5px);
}