:root{
  --bg:#07060b;--panel:#111019;--text:#f7f1ff;--muted:#aaa3b7;
  --pink:#ff4fa3;--violet:#8d62ff;--cyan:#45e0ff;--gold:#ffd46b;
  --line:rgba(255,255,255,.12);--glass:rgba(255,255,255,.06);
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--bg);color:var(--text);
font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;overflow-x:hidden}
a{color:inherit;text-decoration:none} button{font:inherit}
.page{min-height:100vh;position:relative;background:
radial-gradient(circle at 15% 15%,rgba(141,98,255,.10),transparent 28%),
radial-gradient(circle at 85% 35%,rgba(255,79,163,.10),transparent 30%),var(--bg)}
.noise{position:fixed;inset:0;pointer-events:none;z-index:20;opacity:.09;
background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E");mix-blend-mode:soft-light}
#fx{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
.kicker{font-size:11px;letter-spacing:.28em;color:var(--cyan);font-weight:800;text-transform:uppercase}
.topbar,.chapter-nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:20px 4vw;
backdrop-filter:blur(14px);background:linear-gradient(to bottom,rgba(7,6,11,.78),transparent)}
.chapter-nav{font-size:11px;letter-spacing:.18em}.sigil{font-weight:900;letter-spacing:.2em}
.top-actions{display:flex;gap:10px}.top-actions button,.sound-toggle,.nav-open{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--glass);color:#fff;cursor:pointer}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 22px;border-radius:999px;border:1px solid var(--line);cursor:pointer;transition:.25s}
.btn-primary{background:linear-gradient(135deg,var(--pink),var(--violet));box-shadow:0 10px 40px rgba(255,79,163,.25)}
.btn-ghost{background:rgba(255,255,255,.05)}.btn:hover{transform:translateY(-2px) scale(1.01)}
.aurora{position:fixed;inset:-30%;z-index:0;filter:blur(70px);opacity:.22;background:
conic-gradient(from 45deg,var(--pink),var(--violet),var(--cyan),var(--gold),var(--pink));animation:aurora 18s linear infinite}
@keyframes aurora{to{transform:rotate(360deg)}}
.gateway{position:relative;min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;padding:10vh 7vw 6vh;z-index:2}
.gateway-copy{max-width:800px}.gateway-copy h1{font-size:clamp(72px,10vw,170px);line-height:.78;letter-spacing:-.07em;margin:15px 0 34px}
.gateway-copy h1 span{color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.5);text-shadow:0 0 40px rgba(69,224,255,.18)}
.lede{max-width:620px;font-size:17px;line-height:1.8;color:var(--muted)}.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.memory-dial{position:relative;width:min(38vw,520px);aspect-ratio:1;margin:auto;display:grid;place-items:center;filter:drop-shadow(0 0 40px rgba(141,98,255,.25))}
.dial-ring{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.2)}.r1{inset:0;animation:spin 26s linear infinite}.r2{inset:12%;border-style:dashed;animation:spin 18s linear reverse infinite}.r3{inset:27%;animation:pulse 4s ease-in-out infinite}
.dial-ring:before,.dial-ring:after{/* [CHỮ / BIỂU TƯỢNG CSS] Chuỗi sau content là chữ vẽ thêm bằng ::before/::after của bộ chọn này; không phải nội dung album. Chuỗi rỗng tạo lớp trang trí trống. Chỉ đổi phần trong nháy nếu muốn đổi nhãn / biểu tượng. */content:"";position:absolute;width:12px;height:12px;border-radius:50%;background:var(--cyan);box-shadow:0 0 30px var(--cyan)}
.dial-ring:before{top:-6px;left:50%}.dial-ring:after{bottom:-6px;right:20%;background:var(--pink);box-shadow:0 0 30px var(--pink)}
.dial-core{width:34%;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;align-content:center;background:radial-gradient(circle,rgba(255,255,255,.12),rgba(255,255,255,.02));border:1px solid var(--line);backdrop-filter:blur(18px)}
.dial-core span{font-size:58px;font-weight:300}.dial-core small{letter-spacing:.35em;color:var(--muted)}
@keyframes spin{to{transform:rotate(360deg)}} @keyframes pulse{50%{transform:scale(1.08);box-shadow:0 0 80px rgba(255,79,163,.15)}}
.gateway-index{position:absolute;right:3vw;bottom:4vh;display:flex;gap:18px;flex-wrap:wrap;justify-content:flex-end;font-size:10px;letter-spacing:.14em;color:var(--muted)}
.scene-flash{position:fixed;inset:0;background:white;opacity:0;pointer-events:none;z-index:100}

.story-shell{padding-top:80px}.story-hero{min-height:100vh;position:relative;display:grid;place-items:center;padding:7vw;overflow:hidden;perspective:1200px}
.story-copy{position:relative;z-index:5;max-width:850px;text-align:center}.story-copy h1{font-size:clamp(58px,8vw,132px);line-height:.9;margin:12px 0 25px}.story-copy p:last-child{max-width:650px;margin:auto;color:var(--muted);line-height:1.8}
.depth-card{position:absolute;width:36vw;height:48vh;border:1px solid var(--line);background:rgba(255,255,255,.025);backdrop-filter:blur(8px);transform-style:preserve-3d}
.depth-1{transform:rotateX(58deg) rotateZ(18deg) translateZ(-100px);left:7%;top:15%}.depth-2{transform:rotateX(68deg) rotateZ(-23deg) translateZ(-180px);right:8%;bottom:10%}
.floating-photo{position:absolute;width:180px;aspect-ratio:4/5;padding:8px;background:#f5f0e7;box-shadow:0 30px 80px rgba(0,0,0,.5);transform-style:preserve-3d}
.floating-photo img{width:100%;height:100%;object-fit:cover;filter:saturate(.9)}.p1{left:7%;top:20%;transform:rotate(-12deg) translateZ(120px)}.p2{right:8%;top:25%;transform:rotate(9deg) translateZ(180px)}.p3{right:18%;bottom:10%;transform:rotate(-6deg) translateZ(80px)}
.timeline-immersive{width:min(1240px,92%);margin:auto;padding:80px 0 160px;display:grid;gap:180px}
.memory-beat{display:grid;grid-template-columns:90px 1.1fr .9fr;gap:36px;align-items:center}.memory-beat.reverse{grid-template-columns:90px .9fr 1.1fr}.memory-beat.reverse .beat-media{order:3}.memory-beat.reverse .beat-text{order:2}
.beat-number{font-size:12px;letter-spacing:.2em;color:var(--cyan);writing-mode:vertical-rl}.beat-media{border-radius:26px;overflow:hidden;box-shadow:0 40px 120px rgba(0,0,0,.45);transform:rotate(-2deg)}.beat-media img{display:block;width:100%;height:520px;object-fit:cover}
.beat-text h2{font-size:clamp(38px,5vw,72px);line-height:1;margin:0 0 18px}.beat-text p{color:var(--muted);line-height:1.9}
.portal-next{padding:120px 20px 160px;text-align:center}.portal-next p{color:var(--muted)}.portal{display:inline-block;margin-top:18px;font-size:clamp(24px,4vw,54px);letter-spacing:-.03em}

.gallery-world{padding:120px 4vw 80px;min-height:100vh;overflow:hidden}.gallery-intro{max-width:900px}.gallery-intro h1{font-size:clamp(58px,8vw,130px);line-height:.88;margin:16px 0 20px}.gallery-intro p:last-child{color:var(--muted)}
.polaroid-field{position:relative;min-height:1500px;margin-top:40px;border-top:1px solid var(--line);background:
linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:40px 40px}
.polaroid{position:absolute;width:230px;background:#efe9df;padding:10px 10px 42px;color:#221d1c;box-shadow:0 20px 70px rgba(0,0,0,.45);cursor:grab;user-select:none;touch-action:none;transition:box-shadow .2s}
.polaroid:active{cursor:grabbing;box-shadow:0 30px 100px rgba(0,0,0,.7)}.polaroid img{width:100%;height:260px;object-fit:cover;display:block}.polaroid .cap{font-family:Georgia,serif;padding:10px 4px 0;font-size:14px}
.lightbox{position:fixed;inset:0;background:rgba(4,3,8,.92);z-index:90;display:none;place-items:center;padding:40px;backdrop-filter:blur(20px)}.lightbox.open{display:grid}.lightbox img{max-width:90vw;max-height:78vh;box-shadow:0 50px 140px #000}.lightbox-close{position:absolute;top:25px;right:28px;width:50px;height:50px;border-radius:50%;background:rgba(255,255,255,.1);border:1px solid var(--line);color:#fff;font-size:28px}.lightbox #lightboxCaption{margin-top:14px;color:var(--muted)}

.page-cinema{background:#030304}.cinema-grain{position:fixed;inset:0;pointer-events:none;z-index:3;background:repeating-linear-gradient(0deg,rgba(255,255,255,.025) 0 1px,transparent 1px 3px);mix-blend-mode:overlay}
.cinema-shell{padding:130px 4vw 120px}.cinema-title{max-width:900px}.cinema-title h1{font-family:Georgia,serif;font-weight:400;font-size:clamp(56px,7vw,110px);line-height:.95;margin:12px 0 50px}
.screen-room{position:relative;width:min(1200px,95vw);margin:auto;padding:3vw;background:linear-gradient(145deg,#111,#050505);border:1px solid #222;box-shadow:0 50px 150px #000}
.screen-room video{width:100%;display:block;aspect-ratio:16/9;background:#000;position:relative;z-index:2}.screen-glow{position:absolute;inset:8%;background:radial-gradient(circle,var(--violet),transparent 65%);filter:blur(80px);opacity:.28}
.screen-reflection{height:120px;background:linear-gradient(to bottom,rgba(255,255,255,.06),transparent);filter:blur(20px);transform:perspective(500px) rotateX(70deg);opacity:.2}
.reel{display:flex;gap:18px;overflow-x:auto;padding:30px 2vw 50px}.reel-item{min-width:280px;border:1px solid var(--line);padding:10px;background:#0d0d10;cursor:pointer}.reel-item img{width:100%;height:160px;object-fit:cover}.reel-item b{display:block;padding:12px 4px}
.audio-room{width:min(900px,92%);margin:100px auto 0;padding:50px;border:1px solid var(--line);background:rgba(255,255,255,.035);text-align:center}.audio-room h2{font-size:44px;margin:0 0 10px}.audio-room p{color:var(--muted)}

.cosmos{position:relative;min-height:100vh;overflow:hidden}.cosmos canvas{position:absolute;inset:0;width:100%;height:100%}.cosmos-copy{position:absolute;left:6vw;top:16vh;z-index:3;max-width:680px;pointer-events:none}.cosmos-copy h1{font-size:clamp(58px,8vw,120px);line-height:.9;margin:10px 0 22px}.cosmos-copy p:last-child{color:var(--muted);line-height:1.8}.star-note{position:fixed;z-index:10;right:4vw;bottom:5vh;width:min(430px,90vw);padding:24px;border:1px solid var(--line);background:rgba(9,8,15,.72);backdrop-filter:blur(18px);opacity:0;transform:translateY(20px);transition:.35s}.star-note.show{opacity:1;transform:none}.star-note h3{margin:0 0 8px}.star-note p{margin:0;color:var(--muted)}

.letters-shell{padding:130px 5vw 130px}.letters-intro{max-width:960px}.letters-intro h1{font-family:Georgia,serif;font-weight:400;font-size:clamp(60px,8vw,120px);line-height:.95;margin:15px 0 80px}
.letter-stack{display:grid;gap:80px;width:min(900px,94%);margin:auto}.letter-card{position:relative;background:#eee7d8;color:#241e1c;padding:60px clamp(28px,7vw,90px);box-shadow:0 40px 110px rgba(0,0,0,.38);transform:rotate(-1deg);font-family:Georgia,serif}
.letter-card:nth-child(2){transform:rotate(1.2deg)}.letter-card:nth-child(3){transform:rotate(-.5deg)}.letter-card h2{font-size:42px;font-weight:400}.letter-card p{font-size:19px;line-height:1.9}.wax{position:absolute;right:32px;top:28px;width:54px;height:54px;border-radius:50%;background:#6c0f23;color:#f4c5cf;display:grid;place-items:center;box-shadow:inset 0 0 15px #2d020b}
.typewriter-panel{width:min(900px,94%);margin:100px auto 0;padding:35px;border-left:1px solid var(--cyan);color:var(--muted);font-family:ui-monospace,monospace;min-height:150px;line-height:1.8}

.finale-shell{min-height:100vh;display:grid;place-items:center;padding:90px 20px;overflow:hidden}.finale-stage{position:relative;z-index:2;max-width:1000px;text-align:center}.finale-stage h1{font-size:clamp(62px,9vw,140px);line-height:.86;letter-spacing:-.06em;margin:15px 0 30px}.finale-copy{max-width:720px;margin:0 auto 30px;color:var(--muted);line-height:1.9}.finale-halo{position:absolute;z-index:-1;width:70vw;height:70vw;border-radius:50%;left:50%;top:50%;transform:translate(-50%,-50%);background:conic-gradient(from 180deg,var(--pink),transparent,var(--cyan),transparent,var(--violet));filter:blur(80px);opacity:.18;animation:spin 22s linear infinite}
.closing-sequence{position:fixed;inset:0;z-index:80;background:#000;display:none;place-items:center;overflow:hidden}.closing-sequence.active{display:grid}.closing-line{position:absolute;width:1px;height:0;background:#fff;box-shadow:0 0 40px #fff}.closing-message{opacity:0;font-family:Georgia,serif;font-size:clamp(34px,6vw,82px);text-align:center}

.magnetic{will-change:transform}
@media(max-width:800px){
.gateway{grid-template-columns:1fr;padding-top:120px}.memory-dial{width:78vw;margin-top:80px}.gateway-index{position:relative;right:auto;bottom:auto;margin-top:50px;justify-content:flex-start}
.memory-beat,.memory-beat.reverse{grid-template-columns:1fr}.memory-beat.reverse .beat-media,.memory-beat.reverse .beat-text{order:initial}.beat-number{writing-mode:horizontal-tb}.beat-media img{height:420px}
.floating-photo{width:120px}.p1{left:2%}.p2{right:2%}.p3{right:8%}
.polaroid-field{min-height:2200px}.polaroid{width:180px}.polaroid img{height:210px}
}