:root{
  --gold:#d9b26a; --gold-soft:#f0d9a8; --ink:#0b0d11; --panel:rgba(16,18,24,.72);
  --panel-solid:#13161d; --line:rgba(217,178,106,.28); --text:#f2ede3; --muted:#b9b2a4;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;background:#07080b;color:var(--text);
  font-family:"Segoe UI",Roboto,Arial,"Helvetica Neue",sans-serif;-webkit-font-smoothing:antialiased}
body{user-select:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
#app{position:fixed;inset:0;overflow:hidden}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab;touch-action:none}
#gl.dragging{cursor:grabbing}

/* ---------- top bar ---------- */
.topbar{position:absolute;left:0;right:0;top:0;display:flex;justify-content:space-between;align-items:center;
  gap:12px;padding:14px 18px;z-index:30;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,8,11,.78),rgba(7,8,11,0))}
.brand{display:flex;align-items:center;gap:12px;pointer-events:auto}
.brand-mark{width:38px;height:38px;border-radius:50%;flex:none;overflow:hidden;
  background:radial-gradient(circle at 35% 30%,#f6e6c2,#c99b4e 58%,#7d5a22 100%);
  box-shadow:0 0 0 1px rgba(255,255,255,.18) inset,0 6px 18px rgba(0,0,0,.4)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16px;letter-spacing:.4px}
.brand-text small{color:var(--muted);font-size:11px;letter-spacing:.6px;text-transform:uppercase}
.tools{display:flex;gap:8px;pointer-events:auto;flex-wrap:wrap;justify-content:flex-end}
.tool{display:flex;align-items:center;gap:7px;padding:8px 13px;border-radius:999px;color:var(--text);
  background:var(--panel);border:1px solid rgba(255,255,255,.08);backdrop-filter:blur(12px);
  font-size:13px;transition:.18s;box-shadow:0 6px 18px rgba(0,0,0,.28)}
.tool span{font-size:14px}
.tool em{font-style:normal;font-weight:500}
.tool:hover{border-color:var(--line);transform:translateY(-1px)}
.tool-gold{background:linear-gradient(180deg,rgba(217,178,106,.24),rgba(217,178,106,.12));
  border-color:rgba(217,178,106,.5);color:#fff8e7}
.tool-icon{padding:8px 12px}
.tool.off{opacity:.55}

/* ---------- progress ---------- */
.progress{position:absolute;left:18px;top:74px;z-index:25;display:flex;align-items:baseline;gap:4px;
  padding:6px 12px;border-radius:999px;background:var(--panel);border:1px solid rgba(255,255,255,.07);
  backdrop-filter:blur(10px);font-size:13px;color:var(--muted);letter-spacing:.4px}
.progress b{color:var(--gold-soft);font-size:14px}
.progress i{font-style:normal}
.progress span{margin-left:10px;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.8px}

/* ---------- nav arrows ---------- */
.nav-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:26;display:flex;align-items:center;gap:8px;
  padding:10px 14px;border-radius:999px;background:var(--panel);border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(12px);transition:.18s;max-width:34vw}
.nav-arrow span{font-size:26px;line-height:1;color:var(--gold-soft);font-weight:300}
.nav-arrow em{font-style:normal;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:22vw}
.nav-arrow:hover{border-color:var(--line);background:rgba(24,27,34,.85)}
.nav-arrow:disabled{opacity:.25;pointer-events:none}
.nav-prev{left:14px}
.nav-next{right:14px;flex-direction:row-reverse}

/* ---------- subtitle ---------- */
.subtitle{position:absolute;left:50%;bottom:168px;transform:translateX(-50%) translateY(8px);z-index:27;
  width:min(760px,86vw);padding:12px 18px 13px;border-radius:14px;opacity:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(12,13,17,.86),rgba(12,13,17,.74));
  border:1px solid rgba(217,178,106,.35);box-shadow:var(--shadow);transition:opacity .35s,transform .35s;text-align:left}
.subtitle.show{opacity:1;transform:translateX(-50%) translateY(0)}
.subtitle b{display:block;color:var(--gold);font-size:12.5px;letter-spacing:.8px;text-transform:uppercase;margin-bottom:4px}
.subtitle p{margin:0;font-size:15px;line-height:1.55;color:#efe9dd}

/* ---------- carousel ---------- */
.carousel{position:absolute;left:0;right:0;bottom:0;z-index:28;display:flex;gap:10px;padding:14px 18px 16px;
  overflow-x:auto;scrollbar-width:none;background:linear-gradient(0deg,rgba(7,8,11,.92) 30%,rgba(7,8,11,0))}
.carousel::-webkit-scrollbar{display:none}
.card{flex:0 0 auto;width:104px;border-radius:12px;overflow:hidden;background:rgba(22,25,32,.8);
  border:1px solid rgba(255,255,255,.08);transition:.18s;position:relative}
.card img{display:block;width:100%;height:58px;object-fit:cover;opacity:.85}
.card figcaption{padding:6px 7px 7px;font-size:10.5px;line-height:1.25;color:var(--muted);height:34px;overflow:hidden}
.card .num{position:absolute;top:5px;left:6px;font-size:10px;color:#fff;background:rgba(0,0,0,.45);
  padding:1px 5px;border-radius:6px;letter-spacing:.5px}
.card:hover{border-color:var(--line);transform:translateY(-2px)}
.card.active{border-color:var(--gold);box-shadow:0 0 0 1px rgba(217,178,106,.45),0 8px 20px rgba(0,0,0,.45)}
.card.active img{opacity:1}
.card.active figcaption{color:var(--gold-soft)}

/* ---------- info card ---------- */
.info-card{position:absolute;right:16px;top:86px;z-index:29;width:min(380px,88vw);max-height:min(62vh,560px);
  overflow:auto;padding:18px 18px 14px;border-radius:16px;background:linear-gradient(180deg,rgba(18,20,26,.96),rgba(14,16,21,.94));
  border:1px solid var(--line);box-shadow:var(--shadow);transform:translateX(16px);opacity:0;pointer-events:none;transition:.25s}
.info-card.show{opacity:1;transform:none;pointer-events:auto}
.info-close{position:absolute;right:10px;top:8px;color:var(--muted);font-size:15px;padding:4px 7px;border-radius:8px}
.info-close:hover{color:#fff;background:rgba(255,255,255,.07)}
.info-chapter{font-size:10.5px;letter-spacing:1.2px;text-transform:uppercase;color:var(--gold);margin-bottom:6px}
.info-title{margin:0 0 8px;font-size:20px;line-height:1.3;color:#fff}
.info-text{margin:0 0 12px;font-size:13.5px;line-height:1.65;color:#ddd6c8}
.info-actions{display:flex;gap:8px;flex-wrap:wrap}
.chip{padding:7px 12px;border-radius:999px;font-size:12px;background:rgba(217,178,106,.12);
  border:1px solid rgba(217,178,106,.35);color:var(--gold-soft);transition:.18s}
.chip:hover{background:rgba(217,178,106,.22)}

/* ---------- sheets / modal ---------- */
.sheet{position:absolute;left:0;top:0;bottom:0;width:min(360px,86vw);z-index:40;display:flex;flex-direction:column;
  background:linear-gradient(180deg,#12151b,#0d0f14);border-right:1px solid rgba(255,255,255,.07);
  transform:translateX(-102%);transition:transform .28s ease;box-shadow:24px 0 60px rgba(0,0,0,.45)}
.sheet.show{transform:none}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 10px}
.sheet-head h3{margin:0;font-size:15px;letter-spacing:.3px}
.sheet-close{color:var(--muted);font-size:16px;padding:4px 8px;border-radius:8px}
.sheet-close:hover{color:#fff;background:rgba(255,255,255,.07)}
.sheet-body{overflow:auto;padding:4px 12px 20px}
.chapter{margin:10px 0 6px;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--gold)}
.menu-item{display:flex;align-items:center;gap:10px;width:100%;text-align:left;padding:9px 10px;border-radius:10px;
  color:#e8e2d6;font-size:13.5px;transition:.15s}
.menu-item:hover{background:rgba(255,255,255,.05)}
.menu-item.active{background:rgba(217,178,106,.14);color:#fff}
.menu-item b{font-size:11px;color:var(--muted);width:20px;flex:none}

.modal{position:absolute;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:20px;
  background:rgba(4,5,8,.82);backdrop-filter:blur(6px);opacity:0;pointer-events:none;transition:.22s}
.modal.show{opacity:1;pointer-events:auto}
.modal-box{width:min(1000px,94vw);max-height:92vh;overflow:auto;border-radius:16px;padding:14px 16px 16px;
  background:#101319;border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow)}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.modal-head h3{margin:0;font-size:16px}
#vid{width:100%;max-height:64vh;border-radius:12px;background:#000;display:block}
.video-chapters{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 4px}
.modal-note{margin:8px 0 0;font-size:12px;color:var(--muted);line-height:1.5}

/* ---------- intro ---------- */
.intro{position:absolute;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;padding:22px;
  background:radial-gradient(120% 120% at 50% 20%,rgba(23,26,33,.9),rgba(5,6,9,.96));transition:opacity .5s}
.intro.hide{opacity:0;pointer-events:none}
.intro-card{width:min(680px,94vw);text-align:left;padding:30px 30px 24px;border-radius:20px;
  background:linear-gradient(180deg,rgba(20,23,30,.92),rgba(12,14,19,.96));border:1px solid var(--line);
  box-shadow:0 30px 80px rgba(0,0,0,.6)}
.intro-eyebrow{font-size:10.5px;letter-spacing:2px;color:var(--gold);margin-bottom:10px}
.intro-card h1{margin:0 0 12px;font-size:clamp(24px,4.4vw,38px);line-height:1.15;letter-spacing:.2px}
.intro-card h1 span{color:var(--gold);margin:0 10px;font-weight:400}
.intro-desc{margin:0 0 16px;color:#d8d2c5;font-size:14px;line-height:1.65}
.intro-meta{display:flex;gap:26px;margin:0 0 20px;padding:0;list-style:none}
.intro-meta li{display:flex;flex-direction:column}
.intro-meta b{font-size:20px;color:var(--gold-soft)}
.intro-meta span{font-size:11px;color:var(--muted);letter-spacing:.4px}
.intro-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn-primary{padding:12px 22px;border-radius:999px;font-size:14px;font-weight:600;color:#241a08;
  background:linear-gradient(180deg,#f2dbab,#d9b26a);box-shadow:0 10px 26px rgba(217,178,106,.28)}
.btn-primary:hover{filter:brightness(1.05)}
.btn-ghost{padding:12px 20px;border-radius:999px;font-size:14px;color:var(--gold-soft);
  border:1px solid rgba(217,178,106,.45);background:rgba(217,178,106,.06)}
.btn-ghost:hover{background:rgba(217,178,106,.14)}
.intro-hint{margin:16px 0 0;font-size:11.5px;color:var(--muted)}

/* ---------- loading / toast ---------- */
.loading{position:absolute;inset:0;z-index:70;display:flex;align-items:center;justify-content:center;background:#07080b;transition:opacity .4s}
.loading.hide{opacity:0;pointer-events:none}
.loading-inner{text-align:center}
.spinner{width:42px;height:42px;margin:0 auto 14px;border-radius:50%;
  border:2px solid rgba(217,178,106,.2);border-top-color:var(--gold);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
#loading-text{color:var(--muted);font-size:13px;margin:0}
.toast{position:absolute;left:50%;bottom:190px;transform:translate(-50%,10px);z-index:80;padding:9px 16px;border-radius:999px;
  background:rgba(15,17,22,.94);border:1px solid var(--line);color:var(--gold-soft);font-size:12.5px;
  opacity:0;pointer-events:none;transition:.25s}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- hotspots ---------- */
#hotspots{position:absolute;inset:0;z-index:20;pointer-events:none}
.hs{position:absolute;left:0;top:0;transform:translate(-50%,-50%);pointer-events:auto;cursor:pointer;
  display:flex;align-items:center;gap:8px;will-change:transform,opacity}
.hs .dot{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(8,10,14,.72);border:1px solid rgba(217,178,106,.72);backdrop-filter:blur(6px);
  box-shadow:0 8px 20px rgba(0,0,0,.4);transition:.18s;font-size:17px;color:var(--gold-soft)}
.hs .hs-ico{width:46px;height:46px;pointer-events:none}
.hs .hs-ico svg{width:24px;height:24px;display:block;pointer-events:none}
.hs .lbl{padding:5px 10px;border-radius:8px;background:rgba(10,12,16,.84);border:1px solid rgba(255,255,255,.14);
  font-size:12px;color:#f2ede3;white-space:nowrap;opacity:0;transform:translateX(-4px);transition:.18s;pointer-events:none;
  text-shadow:0 1px 3px rgba(0,0,0,.95),0 0 8px rgba(0,0,0,.7);box-shadow:0 4px 14px rgba(0,0,0,.45)}
.hs:hover .dot{background:rgba(217,178,106,.9);color:#241a08;transform:scale(1.06)}
.hs:hover .lbl{opacity:1;transform:none}
.hs.hidden{display:none}
.hs.kind-overview .dot{width:36px;height:36px;font-size:13px}
.hs.kind-overview .hs-ico svg{width:20px;height:20px}
.hs.kind-video .dot{background:rgba(217,178,106,.92);color:#231a08;border-color:#f5e2b6}

/* --- icon hotspot động: mỗi icon 1 hiệu ứng riêng (CONTRACT.md §11) --- */
.hs-ico svg *{transform-box:fill-box;transform-origin:center}
.icon-arrow svg{animation:hs-nudge-r 1.5s ease-in-out infinite}
.icon-arrow-back svg{animation:hs-nudge-l 1.5s ease-in-out infinite}
.icon-360 svg{animation:hs-spin 4s linear infinite}
.icon-pulse .core{animation:hs-beat 1.6s ease-in-out infinite}
.icon-radar .r1,.icon-radar .r2{opacity:.7}
.icon-radar .r1{animation:hs-wave 2.4s ease-out infinite}
.icon-radar .r2{animation:hs-wave 2.4s ease-out 1.2s infinite}
.icon-bounce svg{animation:hs-bounce 1.6s ease-in-out infinite}
.icon-play .ring{animation:hs-ring 2s ease-in-out infinite}
.icon-info .spark{opacity:.7;animation:hs-sparkle 2.8s ease-in-out infinite}
.icon-photo .sun{animation:hs-glint 2.2s ease-in-out infinite}
.icon-audio .e1{animation:hs-eq .9s ease-in-out infinite}
.icon-audio .e2{animation:hs-eq .9s ease-in-out .15s infinite}
.icon-audio .e3{animation:hs-eq .9s ease-in-out .3s infinite}
.icon-map .pin{animation:hs-pin 1.8s ease-in-out infinite}
.icon-star svg{animation:hs-twinkle 2.4s ease-in-out infinite}

@keyframes hs-nudge-r{0%,100%{transform:translateX(-2px)}50%{transform:translateX(2px)}}
@keyframes hs-nudge-l{0%,100%{transform:translateX(2px)}50%{transform:translateX(-2px)}}
@keyframes hs-spin{to{transform:rotate(360deg)}}
@keyframes hs-beat{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.78)}}
@keyframes hs-wave{0%{transform:scale(.45);opacity:.9}100%{transform:scale(1.12);opacity:0}}
@keyframes hs-bounce{0%,100%{transform:translateY(1.5px)}45%{transform:translateY(-3px)}}
@keyframes hs-ring{0%,100%{opacity:.3;transform:scale(.92)}50%{opacity:.95;transform:scale(1.04)}}
@keyframes hs-sparkle{0%,100%{opacity:.25;transform:scale(.7)}50%{opacity:1;transform:scale(1)}}
@keyframes hs-glint{0%,100%{opacity:.55;transform:scale(.9)}50%{opacity:1;transform:scale(1.15)}}
@keyframes hs-eq{0%,100%{transform:scaleY(.45)}50%{transform:scaleY(1)}}
@keyframes hs-pin{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(1.6)}}
@keyframes hs-twinkle{0%,100%{opacity:.6;transform:scale(.94)}50%{opacity:1;transform:scale(1.06)}}

@media (prefers-reduced-motion: reduce){
  .hs .hs-ico,.hs .hs-ico svg,.hs .hs-ico svg *{animation:none!important;transition:none!important}
}

@media (max-width:720px){
  .brand-text small{display:none}
  .tool em{display:none}
  .tool{padding:9px 11px}
  .progress{top:70px;left:12px}
  .nav-arrow em{display:none}
  .nav-arrow{padding:9px 12px}
  .subtitle{bottom:150px;font-size:13px}
  .info-card{top:auto;bottom:150px;right:10px;left:10px;width:auto;max-height:46vh}
  .intro-card{padding:22px 20px 18px}
  .intro-meta{gap:18px}
  .card{width:88px}
  .card img{height:50px}
}

/* ---------- mobile nhỏ ---------- */
@media (max-width:520px){
  .topbar{padding:10px 12px;gap:8px}
  .brand{gap:8px}
  .brand-mark{width:30px;height:30px}
  .brand-text b{font-size:14px;white-space:nowrap}
  .brand-text small{display:none}
  .tools{gap:6px}
  .tools .tool{padding:8px 9px}
  .tool em{display:none}
  #btn-fs{display:none}
  .progress{top:62px;left:10px;font-size:12px;padding:5px 10px}
  .progress span{display:none}
  .nav-arrow{padding:8px 11px}
  .nav-arrow span{font-size:22px}
  .subtitle{bottom:140px;width:calc(100vw - 20px);padding:10px 12px;border-radius:12px}
  .subtitle b{font-size:11px}
  .subtitle p{font-size:13px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
  .card{width:84px}
  .card img{height:48px}
  .card figcaption{font-size:10px;height:30px}
  .carousel{padding:10px 10px 12px;gap:8px}
  .info-card{bottom:132px;max-height:44vh;padding:14px}
  .intro-card{padding:20px 16px 16px}
  .intro-meta{gap:14px}
  .intro-meta b{font-size:17px}
}

/* --- khuôn dùng chung: ẩn phần tử khi khu không có phim/nhạc, dòng ghi chú rỗng --- */
[hidden]{display:none!important}
.modal-note:empty{display:none}
.brand-mark img{width:100%;height:100%;object-fit:contain;display:block}
.brand-mark.has-logo{background:#f7f3ea}