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

body{
    font-family: "Segoe UI", sans-serif;
    background: linear-gradient(
        135deg,
        #f6f8fb 0%,
        #edf7f6 50%,
        #f8fafc 100%
    );
    overflow-x:hidden;
    color:#1f2937;
}

.launcher-page{
    min-height:100vh;
    position:relative;
    overflow:hidden;
}

/* ORB BACKGROUND */

.orb{
    position:absolute;
    border-radius:50%;
    filter:blur(80px);
    opacity:.35;
}

.orb-one{
    width:500px;
    height:500px;
    background:#6ec6ff;
    top:-120px;
    right:-120px;
}

.orb-two{
    width:420px;
    height:420px;
    background:#7ee8b6;
    left:-100px;
    bottom:-100px;
}

/* LAYOUT */

.launcher-container{
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:80px;
    padding:60px;
    position:relative;
    z-index:2;
}

/* GAMBAR */

.manuscript-visual{
    flex:1;
    display:flex;
    justify-content:center;
}

.circle-frame{
    width:500px;
    height:500px;
    border-radius:50%;
    overflow:hidden;
    border:12px solid rgba(255,255,255,.75);

    box-shadow:
    0 30px 60px rgba(0,0,0,.12),
    0 0 0 30px rgba(255,255,255,.18);

    transition:all .4s ease;
    animation: floatManuscript 5.5s ease-in-out infinite;
}

@keyframes floatManuscript {
    0%, 100% {
        translate: 0 0;
    }
    50% {
        translate: 0 -14px;
    }
}

.circle-frame img{
    width:100%;
    height:100%;
    object-fit:cover;
}

/* TEKS */

.launcher-content{
    flex:1;
    max-width:650px;
    animation:fadeUp 1s ease;
}

.eyebrow{
    color:#0284c7;
    letter-spacing:3px;
    text-transform:uppercase;
    font-size:.8rem;
    font-weight:700;
    margin-bottom:18px;
}

.launcher-content h1{
    font-size:5rem;
    line-height:1;
    margin-bottom:25px;
    color:#0f172a;
}

.lead{
    font-size:1.15rem;
    line-height:1.9;
    margin-bottom:20px;
    color:#334155;
}

.launcher-content p{
    line-height:1.9;
}

/* KARTU PAMERAN */

.exhibition-choices{
    margin-top:35px;
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:18px;
}

.exhibition-card{
    background:rgba(255,255,255,.7);
    backdrop-filter:blur(10px);

    border-radius:20px;
    padding:20px;

    text-decoration:none;
    color:#1e293b;

    transition:.35s ease;
    border:1px solid rgba(255,255,255,.6);
}

.exhibition-card:hover{
    transform:translateY(-8px);
    box-shadow:0 20px 30px rgba(0,0,0,.08);
}

.exhibition-card span{
    font-size:.8rem;
    color:#0284c7;
    font-weight:700;
}

.exhibition-card h3{
    margin:10px 0;
}

/* TOMBOL */

.start-btn{
    display:inline-flex;
    align-items:center;
    gap:12px;

    margin-top:35px;

    background:linear-gradient(
        135deg,
        #0ea5e9,
        #10b981
    );

    color:white;
    text-decoration:none;

    padding:16px 28px;
    border-radius:999px;

    font-weight:600;

    transition:.3s ease;
}

.start-btn:hover{
    transform:translateY(-4px);
    box-shadow:0 18px 30px rgba(14,165,233,.3);
}

/* ANIMASI */

@keyframes fadeUp{
    from{
        opacity:0;
        transform:translateY(30px);
    }
    to{
        opacity:1;
        transform:translateY(0);
    }
}

/* RESPONSIVE */

@media(max-width:1200px){

    .launcher-container{
        flex-direction:column;
        text-align:center;
        gap:40px;
    }

    .launcher-content h1{
        font-size:4rem;
    }

    .circle-frame{
        width:380px;
        height:380px;
    }

    .circle-wrap {
    width: 420px;
    height: 420px;
    }

    .orbit-one {
        width: 420px;
        height: 420px;
    }

    .orbit-two {
        width: 460px;
        height: 460px;
    }

    .orbit-three {
        width: 490px;
        height: 490px;
    }
}

@media(max-width:768px){

    .launcher-container{
        padding:30px;
    }

    .launcher-content h1{
        font-size:3rem;
    }

    .circle-frame{
        width:280px;
        height:280px;
    }

    .exhibition-choices{
        grid-template-columns:1fr;
    }


    .circle-wrap {
        width: 300px;
        height: 300px;
    }

    .orbit-one,
    .orbit-two,
    .orbit-three {
        display: none;
    }

    
    .orbit-svg,
        .manuscript-particle {
            display:none;
        }
}

/* ORB ombak */

.wave-layer {
    position: absolute;
    left: -10%;
    width: 120%;
    height: 220px;
    pointer-events: none;
    opacity: .28;
    z-index: 1;
}

.wave-layer::before {
    content: "";
    position: absolute;
    inset: 0;
    background-repeat: repeat-x;
    background-size: 900px 220px;
    animation: waveMove 18s linear infinite;
}

.wave-one {
    bottom: 0;
}

.wave-one::before {
    background-image: radial-gradient(
        50% 90% at 50% 100%,
        rgba(14,165,233,.28) 0%,
        rgba(14,165,233,.16) 45%,
        transparent 46%
    );
}

.wave-two {
    bottom: 45px;
    opacity: .18;
}

.wave-two::before {
    background-image: radial-gradient(
        50% 90% at 50% 100%,
        rgba(16,185,129,.26) 0%,
        rgba(16,185,129,.12) 45%,
        transparent 46%
    );
    animation-duration: 26s;
    animation-direction: reverse;
}

.wave-three {
    bottom: 90px;
    opacity: .12;
}

.wave-three::before {
    background-image: radial-gradient(
        50% 90% at 50% 100%,
        rgba(15,23,42,.18) 0%,
        rgba(15,23,42,.08) 42%,
        transparent 43%
    );
    animation-duration: 34s;
}

@keyframes waveMove {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-450px);
    }
}


/* gelombang */
.wave-bg{
    position:absolute;
    inset:0;
    z-index:0;
    overflow:hidden;
    pointer-events:none;
}

.wave-bg svg{
    width:100%;
    height:100%;
}

.wave-line{
    fill:none;

    stroke:rgba(14,165,233,.18);

    stroke-width:2;

    stroke-linecap:round;

    stroke-dasharray:8 12;

    animation:waveFlow 18s linear infinite;
}

.wave-line:nth-child(2){
    animation-duration:24s;
    stroke:rgba(16,185,129,.15);
}

.wave-line:nth-child(3){
    animation-duration:30s;
    stroke:rgba(14,165,233,.12);
}

.wave-line:nth-child(4){
    animation-duration:36s;
    stroke:rgba(16,185,129,.10);
}

@keyframes waveFlow{

    from{
        stroke-dashoffset:0;
    }

    to{
        stroke-dashoffset:-400;
    }
}

/* aksara keliling */

.orbit-svg {
    position: absolute;
    pointer-events: none;
    overflow: visible;
    transform-origin: center;
}

.orbit-svg text {
    font-weight: 700;
    letter-spacing: 5px;
    text-shadow: 0 0 10px rgba(14,165,233,.18);
}

.orbit-svg-one {
    width: 555px;
    height: 555px;
    animation: orbitRotate 38s linear infinite;
}

.orbit-svg-one text {
    font-size: 16px;
    fill: rgba(2,132,199,.32);
}

.orbit-svg-two {
    width: 625px;
    height: 625px;
    animation: orbitRotateReverse 56s linear infinite;
}

.orbit-svg-two text {
    font-size: 13px;
    fill: rgba(16,185,129,.24);
}

.orbit-svg-three {
    width: 700px;
    height: 700px;
    animation: orbitRotate 74s linear infinite;
}

.orbit-svg-three text {
    font-size: 12px;
    fill: rgba(15,23,42,.18);
    letter-spacing: 7px;
}

.orbit-svg-four {
    width: 760px;
    height: 760px;
    animation: orbitRotateReverse 96s linear infinite;
}

.orbit-svg-four text {
    font-size: 11px;
    fill: rgba(14,165,233,.15);
    letter-spacing: 8px;
}

@keyframes orbitRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes orbitRotateReverse {
    from { transform: rotate(360deg); }
    to { transform: rotate(0deg); }
}


/* partikel */
.manuscript-particle {
    position: absolute;
    color: rgba(14,165,233,.45);
    font-size: 16px;
    pointer-events: none;
    animation: particleFloat 5s ease-in-out infinite;
}

.particle-one {
    top: 70px;
    right: 90px;
    animation-delay: 0s;
}

.particle-two {
    bottom: 90px;
    left: 70px;
    animation-delay: 1.2s;
}

.particle-three {
    top: 120px;
    left: 80px;
    animation-delay: 2s;
}

.particle-four {
    bottom: 130px;
    right: 75px;
    animation-delay: 2.8s;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: .35;
    }
    50% {
        transform: translateY(-14px) scale(1.2);
        opacity: .75;
    }
}


/* TRansisi efek */
.page-transition {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: radial-gradient(
        circle at center,
        rgba(255,255,255,.96),
        rgba(237,247,246,.98)
    );
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transition: opacity .45s ease;
}

.page-transition p {
    margin-top: 22px;
    color: #0f766e;
    font-weight: 600;
    letter-spacing: 1px;
}

.transition-orb {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    border: 3px solid rgba(14,165,233,.2);
    border-top-color: #0ea5e9;
    border-right-color: #10b981;
    animation: transitionSpin 1s linear infinite;
}

body.is-leaving .page-transition {
    opacity: 1;
    pointer-events: auto;
}

body.is-leaving .launcher-content {
    opacity: 0;
    transform: translateY(18px);
    transition: .45s ease;
}

body.is-leaving .circle-frame {
    transform: scale(1.18);
    opacity: .18;
    transition: .7s ease;
}

body.is-leaving .orbit-svg,
body.is-leaving .manuscript-particle,
body.is-leaving .wave-bg,
body.is-leaving .orb {
    opacity: 0;
    transition: .45s ease;
}

@keyframes transitionSpin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}