body {
    background: #0a0a0a;
    background-image:
        radial-gradient(2px 2px at 20px 30px, #eee, transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(1px 1px at 90px 40px, #fff, transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(2px 2px at 160px 30px, #fff, transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: twinkle 4s ease-in-out infinite alternate;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    color: #e6e6fa;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

@keyframes twinkle {
    0% {
        opacity: 0.8;
    }

    100% {
        opacity: 1;
    }
}

.space-container {
    background: linear-gradient(135deg,
            rgba(25, 25, 112, 0.3) 0%,
            rgba(72, 61, 139, 0.2) 25%,
            rgba(25, 25, 112, 0.4) 50%,
            rgba(0, 0, 0, 0.8) 100%);
    border-radius: 20px;
    padding: 2rem;
    margin: 2rem;
    box-shadow:
        0 0 50px rgba(138, 43, 226, 0.3),
        inset 0 0 50px rgba(72, 61, 139, 0.1);
    border: 1px solid rgba(138, 43, 226, 0.2);
}

.nav-bar {
    background: linear-gradient(90deg,
            rgba(75, 0, 130, 0.6),
            rgba(138, 43, 226, 0.4));
    border-radius: 15px;
    padding: 1rem;
    margin-bottom: 2rem;
    box-shadow: 0 5px 20px rgba(138, 43, 226, 0.3);
    border: 1px solid rgba(186, 85, 211, 0.3);
}

.main-card {
    background: linear-gradient(145deg,
            rgba(25, 25, 112, 0.4),
            rgba(72, 61, 139, 0.3),
            rgba(147, 0, 211, 0.2));
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow:
        0 10px 40px rgba(138, 43, 226, 0.4),
        inset 0 1px 10px rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(186, 85, 211, 0.4);
    position: relative;
    overflow: hidden;
}

.main-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.6),
            transparent);
}

.nav-bar a {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    background: rgba(138, 43, 226, 0.3);
    border: 1px solid rgba(186, 85, 211, 0.4);
    margin: 0 0.5rem;
    font-weight: 500;
    display: inline-block;
}

.nav-bar a:hover {
    color: #fff;
    background: linear-gradient(45deg, #8a2be2, #ba55d3);
    box-shadow: 0 5px 15px rgba(138, 43, 226, 0.5);
    transform: translateY(-2px);
}

.nav-bar a.active {
    background: linear-gradient(45deg, #8a2be2, #ba55d3);
    box-shadow: 0 3px 10px rgba(138, 43, 226, 0.4);
}

.content-list {
    color: #e6e6fa;
    line-height: 1.8;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.content-list li {
    margin-bottom: 0.5rem;
}

video {
    max-width: 100%;
    border-radius: 10px;
    margin: 1rem 0;
    border: 1px solid rgba(186, 85, 211, 0.3);
}

.title-text {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(45deg, #fff, #e6e6fa, #dda0dd);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(221, 160, 221, 0.5);
    margin-bottom: 1rem;
}

.content-text {
    color: #e6e6fa;
    line-height: 1.6;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.shooting-star {
    position: fixed;
    top: 0;
    left: 0;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: shoot 3s linear infinite;
    z-index: 1;
}

@keyframes shoot {
    0% {
        transform: translateX(-100px) translateY(-100px);
        opacity: 1;
    }

    70% {
        opacity: 1;
    }

    100% {
        transform: translateX(1000px) translateY(1000px);
        opacity: 0;
    }
}