/* =====================================================================
   nova — tata SLIDE (buku cerita / stories, satu halaman penuh per bagian)
   ===================================================================== */
.nv-sampul__tgl{font:600 .85rem/1.4 var(--f-label);letter-spacing:.2em;text-transform:uppercase;color:var(--redup)}
.nv-panggung{position:fixed;inset:0;z-index:10;overflow:hidden;perspective:1800px;background:var(--latar)}
.nv-panggung[aria-hidden="true"]{visibility:hidden}

/* progres atas */
.nv-progres{position:absolute;z-index:6;top:max(8px,env(safe-area-inset-top));left:12px;right:12px;display:flex;gap:3px}
.nv-progres i{flex:1;height:3px;border-radius:3px;background:color-mix(in srgb,var(--teks) 16%,transparent);overflow:hidden}
.nv-progres i b{display:block;height:100%;width:0;background:var(--aksen);transition:width .5s}
.nv-progres i.penuh b{width:100%}
.nv-progres i.aktif b{width:100%;transition:width .6s .1s}
.nv-slidebar{position:absolute;z-index:6;top:calc(max(8px,env(safe-area-inset-top)) + 10px);left:12px;right:12px;display:flex;align-items:center;gap:8px}
.nv-slidebar__hitung{margin:0 auto 0 4px;font:600 .72rem/1.3 var(--f-label);letter-spacing:.14em;color:var(--redup);min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nv-slidebar__hitung b{color:var(--teks)}
.nv-slidebar__hitung span{margin-left:.6em;text-transform:uppercase}
.nv-slidebar .nv-bulat{width:40px;height:40px;background:color-mix(in srgb,var(--permukaan) 75%,transparent);backdrop-filter:blur(8px)}

/* halaman */
.nv-slides{position:absolute;inset:0;transform-style:preserve-3d}
.nv-slide{position:absolute;inset:0;display:flex;overflow-y:auto;overflow-x:hidden;padding:84px 22px 104px;visibility:hidden;background:var(--latar);backface-visibility:hidden;scrollbar-width:none}
.nv-slide::-webkit-scrollbar{display:none}
.nv-slide.aktif{visibility:visible;z-index:2}
.nv-slide.keluar{visibility:visible;z-index:1}
.nv-slide__hias{position:absolute;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.nv-slide__hias svg{position:absolute;width:100%;height:100%}
.nv-slide__isi{position:relative;z-index:1;width:100%;max-width:520px;margin:auto;text-align:center}
.nv-slide.aktif .nv-slide__isi>*{animation:nv-naik .8s both}
.nv-slide.aktif .nv-slide__isi>*:nth-child(2){animation-delay:.08s}
.nv-slide.aktif .nv-slide__isi>*:nth-child(3){animation-delay:.16s}
.nv-slide.aktif .nv-slide__isi>*:nth-child(4){animation-delay:.24s}
.nv-slide.aktif .nv-slide__isi>*:nth-child(n+5){animation-delay:.32s}
.nv-gulir{max-height:52vh;overflow-y:auto;text-align:left;padding:2px 4px;overscroll-behavior:contain}
.nv-slide--ucapan .nv-gulir{max-height:62vh}

/* elemen khusus slide */
.nv-potret{margin:0 auto 1.2em;width:min(68vw,300px);aspect-ratio:3/4;overflow:hidden;border-radius:var(--radius);box-shadow:var(--bayang)}
.nv-potret img{width:100%;height:100%;object-fit:cover}
.nv-potret--lebar{width:min(82vw,380px);aspect-ratio:4/5}
.nv-bab-no{font:400 4.6rem/1 var(--f-judul);color:var(--aksen);margin:0 0 .2em}
.nv-bab-no span{font-size:.3em;color:var(--redup);vertical-align:.9em}
.nv-teks--cerita{font:italic 1.12rem/1.8 var(--f-judul);color:var(--teks)}
.nv-tgl-raksasa{font:400 clamp(3rem,15vw,5.2rem)/1 var(--f-judul);letter-spacing:-.02em;margin:.1em 0 .25em;color:var(--teks)}

/* kolase galeri per halaman */
.nv-kolase{display:grid;gap:10px;margin:0 auto;width:100%;max-width:460px}
.nv-kolase__item{padding:0;border:0;background:var(--permukaan-2);overflow:hidden;cursor:zoom-in;border-radius:var(--radius-kecil)}
.nv-kolase__item img{width:100%;height:100%;object-fit:cover}
.nv-kolase--trio.nv-kolase--n3{grid-template-columns:1.3fr 1fr;grid-template-rows:1fr 1fr;height:min(110vw,520px)}
.nv-kolase--trio.nv-kolase--n3 .nv-kolase__item--1{grid-row:span 2}
.nv-kolase--n2{grid-template-columns:1fr 1fr;height:min(70vw,360px)}
.nv-kolase--n1{height:min(110vw,520px)}
/* selotip: foto berserakan dengan selotip */
.nv-kolase--selotip{position:relative;display:block;height:min(118vw,540px)}
.nv-kolase--selotip .nv-kolase__item{position:absolute;width:62%;aspect-ratio:4/5;height:auto;border:10px solid #fffdf7;border-bottom-width:34px;border-radius:2px;box-shadow:0 10px 24px rgba(40,25,10,.28);overflow:visible}
.nv-kolase--selotip .nv-kolase__item::before{content:"";position:absolute;top:-16px;left:50%;width:84px;height:26px;margin-left:-42px;background:rgba(235,222,190,.82);transform:rotate(-4deg);z-index:2;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.nv-kolase--selotip .nv-kolase__item--1{left:2%;top:2%;transform:rotate(-6deg)}
.nv-kolase--selotip .nv-kolase__item--2{right:2%;top:16%;transform:rotate(5deg);z-index:2}
.nv-kolase--selotip .nv-kolase__item--3{left:18%;bottom:0;transform:rotate(-1.5deg);z-index:3}
.nv-kolase--selotip.nv-kolase--n1 .nv-kolase__item--1{left:19%;top:6%}
/* film: strip film vertikal */
.nv-kolase--film{background:#141414;padding:16px 26px;border-radius:6px;position:relative;gap:12px;grid-template-columns:1fr}
.nv-kolase--film::before,.nv-kolase--film::after{content:"";position:absolute;top:0;bottom:0;width:12px;background:repeating-linear-gradient(#141414 0 6px,#f5f0e6 6px 14px,#141414 14px 20px)}
.nv-kolase--film::before{left:7px}.nv-kolase--film::after{right:7px}
.nv-kolase--film .nv-kolase__item{aspect-ratio:16/10;border-radius:2px}
/* jendela: bingkai lengkung berderet */
.nv-kolase--jendela{grid-auto-flow:column;grid-auto-columns:1fr;align-items:end;height:min(96vw,440px)}
.nv-kolase--jendela .nv-kolase__item{border-radius:999px 999px 10px 10px;height:100%;border:4px solid var(--permukaan)}
.nv-kolase--jendela .nv-kolase__item--2{height:84%}
.nv-kolase--jendela .nv-kolase__item--3{height:70%}
/* neon: bingkai bercahaya diagonal */
.nv-kolase--neon{grid-template-columns:1fr 1fr;gap:14px}
.nv-kolase--neon .nv-kolase__item{aspect-ratio:3/4;border:2px solid var(--aksen);box-shadow:0 0 18px color-mix(in srgb,var(--aksen) 60%,transparent)}
.nv-kolase--neon .nv-kolase__item--1{grid-column:span 2;aspect-ratio:16/10;border-color:var(--aksen-2);box-shadow:0 0 18px color-mix(in srgb,var(--aksen-2) 60%,transparent)}
.nv-kolase--neon.nv-kolase--n2 .nv-kolase__item--1{grid-column:auto;aspect-ratio:3/4}
/* papan herbarium */
.nv-kolase--papan{grid-template-columns:1fr 1fr;gap:14px}
.nv-kolase--papan .nv-kolase__item{aspect-ratio:3/4;padding:10px 10px 30px;background:#fbf8f1;border:1px solid rgba(0,0,0,.12);border-radius:2px;position:relative;box-shadow:0 6px 14px rgba(0,0,0,.08)}
.nv-kolase--papan .nv-kolase__item img{height:100%}
.nv-kolase--papan .nv-kolase__item::after{content:"No. " attr(data-lihat);position:absolute;left:0;right:0;bottom:7px;font:italic .72rem/1 var(--f-judul);color:#7a6d5f}
.nv-kolase--papan .nv-kolase__item--1{grid-column:span 2;aspect-ratio:16/11}
.nv-kolase--papan.nv-kolase--n2 .nv-kolase__item--1{grid-column:auto;aspect-ratio:3/4}

/* navigasi bawah */
.nv-slidenav{position:absolute;z-index:6;left:12px;right:12px;bottom:max(14px,env(safe-area-inset-bottom));display:flex;align-items:center;gap:10px}
.nv-slidenav__petunjuk{flex:1;text-align:center;margin:0;font-size:.74rem;color:var(--redup);transition:opacity .5s}
.nv-slidenav__petunjuk.hilang{opacity:0}
.nv-slidenav .nv-bulat{background:color-mix(in srgb,var(--permukaan) 80%,transparent);backdrop-filter:blur(8px)}
.nv-bulat--utama{background:var(--aksen)!important;color:var(--aksen-teks);border-color:var(--aksen)}

/* daftar isi */
.nv-daftar{position:absolute;inset:0;z-index:20;background:rgba(0,0,0,.5);display:flex;justify-content:flex-end;animation:nv-pudar .25s both}
.nv-daftar__isi{width:min(86vw,360px);height:100%;overflow:auto;background:var(--latar);padding:18px 16px 28px;animation:nv-masuk-kanan .35s both}
@keyframes nv-masuk-kanan{from{transform:translateX(40px);opacity:0}to{transform:none;opacity:1}}
.nv-daftar__kepala{display:flex;justify-content:space-between;align-items:center;margin:0 0 .8em;font:400 1.3rem var(--f-judul)}
.nv-daftar ol{list-style:none;margin:0;padding:0}
.nv-daftar button{display:flex;gap:.9em;align-items:baseline;width:100%;text-align:left;border:0;background:none;padding:.75em .4em;border-bottom:1px solid var(--garis);cursor:pointer;font:400 1rem var(--f-teks)}
.nv-daftar button span{font:600 .72rem var(--f-label);letter-spacing:.12em;color:var(--aksen)}
.nv-daftar button.aktif{color:var(--aksen);font-weight:600}

/* ---------- transisi ---------- */
.nv-panggung .nv-slide.aktif,.nv-panggung .nv-slide.keluar{animation-duration:.7s;animation-fill-mode:both;animation-timing-function:cubic-bezier(.6,.05,.3,1)}
/* kabur (bunga kering) */
.trans-kabur .nv-slide.aktif{animation-name:tk-masuk}
.trans-kabur .nv-slide.keluar{animation-name:tk-keluar}
@keyframes tk-masuk{from{opacity:0;filter:blur(10px);transform:translateY(24px) scale(.98)}to{opacity:1;filter:none;transform:none}}
@keyframes tk-keluar{from{opacity:1}to{opacity:0;filter:blur(10px);transform:scale(1.03)}}
/* zoom (neon kota) */
.trans-zoom [data-arah="maju"] .nv-slide.aktif,.trans-zoom[data-arah="maju"] .nv-slide.aktif{animation-name:tz-masuk}
.trans-zoom[data-arah="maju"] .nv-slide.keluar{animation-name:tz-keluar}
.trans-zoom[data-arah="mundur"] .nv-slide.aktif{animation-name:tz-masuk-m}
.trans-zoom[data-arah="mundur"] .nv-slide.keluar{animation-name:tz-keluar-m}
@keyframes tz-masuk{from{opacity:0;transform:scale(1.35);filter:blur(6px)}to{opacity:1;transform:none;filter:none}}
@keyframes tz-keluar{to{opacity:0;transform:scale(.7)}}
@keyframes tz-masuk-m{from{opacity:0;transform:scale(.7)}to{opacity:1;transform:none}}
@keyframes tz-keluar-m{to{opacity:0;transform:scale(1.35);filter:blur(6px)}}
/* ombak (samudra): halaman baru tersingkap dari bawah/atas */
.trans-ombak[data-arah="maju"] .nv-slide.aktif{animation-name:to-masuk;animation-duration:.9s}
.trans-ombak[data-arah="mundur"] .nv-slide.aktif{animation-name:to-masuk-m;animation-duration:.9s}
.trans-ombak .nv-slide.keluar{animation-name:to-keluar;animation-duration:.9s}
@keyframes to-masuk{from{clip-path:ellipse(0% 0% at 50% 100%)}to{clip-path:ellipse(150% 150% at 50% 100%)}}
@keyframes to-masuk-m{from{clip-path:ellipse(0% 0% at 50% 0%)}to{clip-path:ellipse(150% 150% at 50% 0%)}}
@keyframes to-keluar{from{transform:none}to{transform:translateY(-6%) scale(.96);opacity:.5}}
/* kubus (batik) */
.trans-kubus[data-arah="maju"] .nv-slide.aktif{animation-name:tc-masuk;transform-origin:0 50%}
.trans-kubus[data-arah="maju"] .nv-slide.keluar{animation-name:tc-keluar;transform-origin:100% 50%}
.trans-kubus[data-arah="mundur"] .nv-slide.aktif{animation-name:tc-masuk-m;transform-origin:100% 50%}
.trans-kubus[data-arah="mundur"] .nv-slide.keluar{animation-name:tc-keluar-m;transform-origin:0 50%}
@keyframes tc-masuk{from{transform:translateX(100%) rotateY(90deg)}to{transform:none}}
@keyframes tc-keluar{to{transform:translateX(-100%) rotateY(-90deg)}}
@keyframes tc-masuk-m{from{transform:translateX(-100%) rotateY(-90deg)}to{transform:none}}
@keyframes tc-keluar-m{to{transform:translateX(100%) rotateY(90deg)}}
/* balik halaman (album kenangan) */
.trans-balik[data-arah="maju"] .nv-slide.keluar{animation-name:tb-keluar;transform-origin:0 50%;z-index:3;animation-duration:.9s}
.trans-balik[data-arah="maju"] .nv-slide.aktif{animation-name:tb-bawah;animation-duration:.9s}
.trans-balik[data-arah="mundur"] .nv-slide.aktif{animation-name:tb-masuk;transform-origin:0 50%;z-index:3;animation-duration:.9s}
.trans-balik[data-arah="mundur"] .nv-slide.keluar{animation-name:tb-bawah-k;animation-duration:.9s}
@keyframes tb-keluar{from{transform:none;filter:brightness(1)}to{transform:rotateY(-100deg);filter:brightness(.55)}}
@keyframes tb-masuk{from{transform:rotateY(-100deg);filter:brightness(.55)}to{transform:none;filter:brightness(1)}}
@keyframes tb-bawah{from{filter:brightness(.75)}to{filter:none}}
@keyframes tb-bawah-k{to{filter:brightness(.75)}}