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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Georgia, "Times New Roman", serif;
    background: #020812;
    color: white;
}


/* BACKGROUND */

body::before {
    content: "";
    position: fixed;
    inset: 0;

    background-image:
        radial-gradient(#12385c 1px, transparent 1px);

    background-size: 38px 38px;

    opacity: 0.55;
    pointer-events: none;
}


/* AREA UTAMA */

.page {
    width: 100%;
    min-height: 100vh;

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

    padding: 25px 10px;
}


/* KARTU */

.container {
    position: relative;

    width: 340px;
    min-height: 650px;

    padding: 20px 15px;

    background:
        linear-gradient(
            145deg,
            #030a14,
            #061b35 50%,
            #020812
        );

    border: 1px solid #087cff;
    border-radius: 22px;

    box-shadow:
        0 0 10px rgba(0, 120, 255, .45),
        0 0 35px rgba(0, 100, 255, .18);

    overflow: hidden;
}


/* GARIS BIRU ATAS */

.container::before {
    content: "";

    position: absolute;
    top: 0;
    left: 40px;
    right: 40px;

    height: 2px;

    background: #00bfff;

    box-shadow:
        0 0 10px #00bfff,
        0 0 25px #0077ff;
}


/* LOGO */

.logo {
    width: 180px;
    height: 55px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin: 0 auto;
}

.logo img {
    width: 170px;
    height: 50px;
    object-fit: contain;
    display: block;
}


/* SUBTITLE */

.subtitle {
    text-align: center;

    font-size: 10px;
    font-weight: bold;

    color: #56dfff;

    letter-spacing: 2px;

    margin-bottom: 18px;

    text-shadow:
        0 0 6px rgba(0, 170, 255, .6);
}

.subtitle span {
    color: #a6edff;
}


/* BANNER */

.banner {
    width: 100%;

    border-radius: 17px;

    overflow: hidden;

    border: 2px solid #008cff;

    box-shadow:
        0 0 10px rgba(0, 140, 255, .8),
        0 0 25px rgba(0, 100, 255, .3),
        inset 0 0 20px #000;
}

.banner img {
    display: block;

    width: 100%;
    height: auto;
}


/* BUTTON AREA */

.buttons {
    margin-top: 18px;
}


/* BUTTON */

.btn {
    position: relative;

    display: flex;

    width: 100%;
    height: 44px;

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

    margin-bottom: 18px;

    border-radius: 25px;

    text-decoration: none;

    font-size: 13px;
    font-weight: bold;

    letter-spacing: 2px;

    color: white;

    background:
        linear-gradient(
            135deg,
            #35dce8,
            #087fd5
        );

    border: 1px solid #00cfff;

    box-shadow:
        0 0 10px rgba(0, 160, 255, .65),
        0 0 20px rgba(0, 100, 255, .2),
        inset 0 0 15px rgba(255,255,255,.1);

    transition: .25s;
}


/* HOVER */

.btn:hover {
    transform: scale(1.03);

    background:
        linear-gradient(
            135deg,
            #5cecff,
            #078cff
        );

    box-shadow:
        0 0 15px rgba(0, 200, 255, .95),
        0 0 30px rgba(0, 120, 255, .5);
}


/* DESKRIPSI */

.description {
    margin-top: 5px;

    padding: 12px;

    text-align: center;

    font-size: 9px;
    line-height: 18px;

    color: #82ddff;

    border: 1px dashed #17679c;

    background:
        rgba(0, 70, 130, .18);

    border-radius: 5px;

    box-shadow:
        inset 0 0 15px rgba(0, 120, 255, .06);
}

.description strong {
    color: #00d9ff;

    text-shadow:
        0 0 7px rgba(0, 190, 255, .8);
}


/* FOOTER */

footer {
    margin-top: 25px;

    padding-top: 15px;

    border-top: 1px solid #123452;

    text-align: center;

    font-size: 9px;

    color: #52718c;
}


/* RESPONSIVE */

@media (max-width: 500px) {

    .page {
        padding: 15px 8px;
    }

    .container {
        width: 100%;
        max-width: 350px;
    }

    .logo {
        font-size: 28px;
    }

}/* =========================
   NAVIGASI BAWAH
========================= */

.bottom-nav {
    position: fixed;
    z-index: 9999;

    left: 50%;
    bottom: 0;

    transform: translateX(-50%);

    width: 100%;
    max-width: 900px;
    height: 72px;

    display: grid;
    grid-template-columns: repeat(4, 1fr);

    background: #031946;
    border-top: 2px solid #111;

    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.35);
}

.bottom-item {
    position: relative;

    border: 0;
    border-right: 1px solid #000d28;

    background: #031946;
    color: #fff;

    display: flex;
    flex-direction: column;

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

    padding-bottom: 8px;

    cursor: pointer;
}

.bottom-item:last-child {
    border-right: none;
}

.nav-icon {
    position: absolute;
    top: -25px;

    width: 42px;
    height: 42px;

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

    font-size: 28px;

    background: #fff;
    border-radius: 9px;

    box-shadow: 0 2px 5px rgba(0,0,0,.35);
}

.bottom-item small {
    font-size: 11px;
    font-weight: 900;
}

.bottom-item.active {
    background: #08285e;
}

.bottom-item:hover {
    background: #0a326e;
}