* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family:"Poppins", 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #000;
    color: white;
    overflow: hidden;
}

/* ================= CONTAINER ================= */

.container {
    width: 100%;
    height: 100vh;

    background:
        radial-gradient(
            circle at top,
            rgba(120, 80, 255, 0.18),
            transparent 35%
        ),

        radial-gradient(
            circle at bottom,
            rgba(0, 120, 255, 0.12),
            transparent 40%
        ),

        linear-gradient(
            135deg,
            #090312 0%,
            #12051f 35%,
            #07030d 70%,
            #020104 100%
        );

    position: relative;
    display: flex;
    justify-content: center;
    overflow: hidden;
}

/* SAO NỀN */

.container::before {
    content: "";

    position: absolute;

    width: 100%;
    height: 100%;

    background-image:
        radial-gradient(
            rgba(255,255,255,0.9) 1px,
            transparent 1px
        );

    background-size: 70px 70px;

    opacity: 0.22;

    pointer-events: none;
}

/* GLOW OVERLAY */

.container::after{
    content: "";

    position: absolute;

    inset: 0;

    background:
        radial-gradient(
            circle at center,
            rgba(157,125,255,0.08),
            transparent 60%
        );

    pointer-events: none;
}

/* ================= NAVBAR ================= */

.navbar {
    position: absolute;
    top: 30px;
    right: 60px;

    display: flex;
    gap: 40px;

    z-index: 100;
}

.navbar a {
    color: rgb(168, 165, 165);

    text-decoration: none;

    font-size: 18px;
    font-weight: 500;

    transition: 0.3s ease;
}

.navbar a:hover {
    color: white;
}

/* ================= CONTENT ================= */

.content {
    text-align: center;
    width: 100%;
    padding-top: 80px;
    z-index: 10;
}

.content h1 {
    font-size: 90px;
    margin-bottom: 20px;
    letter-spacing: -2px;
}

/* ================= INFO BOARD ================= */

.info {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 30px;
}

.info span {
    font-size: 16px;
    font-weight: bold;

    display: block;

    margin-bottom: 5px;

    color: #cbbdff;
}

.info h1{
    font-weight: 300;
    font-size: larger;
}

.info h3 {
    font-weight: 300;
    font-size: 14px;

    color: #ddd;

    min-width: 130px;
}

/* ================= MAIN PLANET ================= */

.main-planet-container {
    position: absolute;

    bottom: -600px;

    left: 45%;

    transform: translateX(-50%);

    z-index: 1;

    animation: floating 4s ease-in-out infinite;
}

.main-planet {
    width: 1250px;
    height: 1250px;

    object-fit: contain;

    transition: all 0.5s ease;

    padding-right: 10px;
}

/* ================= SIDE PLANETS ================= */

.side {
    position: absolute;

    width: 700px;
    height: 700px;

    top: 50%;

    transform: translateY(-50%);

    opacity: 0.8;

    z-index: 5;

    pointer-events: none;

    object-fit: contain;
    object-position: center;

    animation: floatingSide 5s ease-in-out infinite;
}

.left {
    left: -300px;

    filter:
        brightness(0.6)
        grayscale(20%);
}

.right {
    right: -250px;

    filter:
        brightness(0.6)
        grayscale(20%);
}

/* ================= BUTTON NAV ================= */

.btn-nav {
    position: absolute;

    top: 0;

    width: 15%;
    height: 100%;

    background: transparent;

    border: none;

    cursor: pointer;

    z-index: 110;
}

.prev {
    left: 0;
}

.next {
    right: 0;
}

/* ================= ANIMATIONS ================= */

@keyframes rotateSun {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes floating {
    0% {
        transform: translate(-50%, 0px);
    }

    50% {
        transform: translate(-50%, -20px);
    }

    100% {
        transform: translate(-50%, 0px);
    }
}

@keyframes floatingSide {
    0% {
        transform: translateY(-50%) translateX(0px);
    }

    50% {
        transform: translateY(-55%) translateX(0px);
    }

    100% {
        transform: translateY(-50%) translateX(0px);
    }
}

/* ================= RESPONSIVE ================= */

@media (max-width: 768px) {

    body {
        overflow: hidden;
    }

    /* NAVBAR */

    .navbar {
        top: 15px;
        right: 15px;

        gap: 15px;
    }

    .navbar a {
        font-size: 14px;
        font-weight: normal;
    }

    /* CONTENT */

    .content {
        padding-top: 60px;
        text-align: center;
    }

    .content h1 {
        font-size: 36px;

        margin-bottom: 25px;

        letter-spacing: normal;
    }

    /* INFO */

    .info {
        display: grid;

        grid-template-columns: 1fr 1fr;

        gap: 20px;

        padding: 0 15px;

        margin-bottom: 30px;
    }

    .info div {
        border:
            1px solid rgba(255, 255, 255, 0.1);

        padding: 10px;

        border-radius: 8px;

        background:
            rgba(255, 255, 255, 0.03);
    }

    .info span {
        font-size: 11px;
        color: #aaa;
    }

    .info h3 {
        font-size: 13px;

        min-width: unset;

        margin-top: 4px;

        color: white;
    }

    /* MAIN PLANET */

    .main-planet-container {
        position: relative;

        display: flex;
        justify-content: center;
        align-items: center;

        bottom: unset;
        left: unset;

        transform: unset;

        margin-top: 20px;

        width: 100%;
        height: auto;
    }

    .main-planet {
        width: 400px;
        height: 400px;

        object-fit: contain;

        padding-right: 0;
    }

    /* SIDE PLANETS */

    .side {
        width: 200px;
        height: 200px;

        opacity: 0.3;

        top: 60%;
    }

    .left {
        left: -50px;
    }

    .right {
        right: -50px;
    }

    /* FLOAT MOBILE */

    @keyframes floating {

        0% {
            transform: translateY(0px);
        }

        50% {
            transform: translateY(-15px);
        }

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

    .main-planet-container {
        animation: floating 4s ease-in-out infinite;
    }
}