@font-face{font-family:Gilroy;src:url(/fonts/gilroy-400.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:Gilroy;src:url(/fonts/gilroy-500.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:Gilroy;src:url(/fonts/gilroy-600.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:HelveticaNeue;src:url(/fonts/dh/hn-light-dh.woff2) format("woff2");font-weight:300;font-display:swap}
@font-face{font-family:HelveticaNeue;src:url(/fonts/dh/hn-regular-dh.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:RMScript;src:url(/fonts/dh/motherland-400-dh.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:RMSerif;src:url(/fonts/dh/blushing-rose-dh.woff2) format("woff2");font-weight:400;font-display:swap}

:root{
  --green:#04291a; --green-2:#0a3a26; --green-3:#124a33;
  --cream:#fff7cf; --gold:#d9b46a; --gold-2:#f1d9a0;
  --u:calc(100vw / 1920); --hd:calc(79*var(--u)); --bar:60px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:#03200f;color:var(--cream);font-family:Gilroy,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-weight:400;
  display:grid;grid-template-rows:var(--hd) 1fr var(--bar);height:100dvh;overflow:hidden;-webkit-tap-highlight-color:transparent;position:relative}
/* banner: project render, darkened toward the edges + green fade so the white book stands out */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(70% 62% at 50% 54%,rgba(3,32,15,.30) 0%,rgba(3,32,15,.55) 60%,rgba(3,32,15,.82) 100%),
    linear-gradient(180deg,rgba(2,18,10,.78) 0%,rgba(3,32,15,.25) 22%,rgba(3,32,15,.35) 62%,rgba(3,32,15,.94) 100%),
    url(/static/flipbook/banner.webp) center 38%/cover no-repeat;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
:focus-visible{outline:2px solid var(--gold-2);outline-offset:2px;border-radius:6px}

/* ---------- header (same as royalmansion.com.vn subpages) ---------- */
.hd{position:relative;z-index:30;height:var(--hd);background:url(/assets/figma/header-bar.png) top center/100% var(--hd) no-repeat}
.hd-logo{position:absolute;left:calc(76*var(--u));top:calc(12*var(--u));width:calc(141*var(--u));height:calc(55*var(--u));display:block}
.hd-logo img{width:100%;height:100%;object-fit:contain;display:block}
.hd-menu{position:absolute;left:calc(850*var(--u));right:calc(136.6*var(--u));top:calc(34*var(--u));display:flex;justify-content:space-between}
.hd-menu a{color:var(--cream);text-decoration:none;font-family:HelveticaNeue,"Helvetica Neue",Helvetica,Arial,sans-serif;font-weight:300;
  font-size:calc(16.67*var(--u));line-height:1;text-transform:uppercase;letter-spacing:0;white-space:nowrap;transition:color .2s}
.hd-menu a:hover{color:var(--gold-2)}
.hd-burger{display:none;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:6px}
.hd-burger span{width:26px;height:1.5px;background:var(--cream);transition:transform .2s,opacity .2s}

/* ---------- stage ---------- */
.stage{position:relative;min-height:0;display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-rows:auto minmax(0,1fr) auto;align-items:center;
  padding:4px clamp(6px,1.4vw,24px) 6px;overflow:hidden}
.title{grid-column:1/-1;text-align:center;padding:.5em 12px 10px;text-shadow:0 2px 14px rgba(0,0,0,.45)}
.title h1{margin:0;font-family:RMSerif,Georgia,serif;font-weight:400;font-size:clamp(24px,2.6vw,46px);line-height:1.35;color:var(--cream);text-transform:uppercase;text-wrap:balance}
.title-sub{display:block;margin-top:6px;font-family:RMSerif,Georgia,serif;font-weight:400;font-size:clamp(13px,1.05vw,18px);letter-spacing:.04em;color:var(--gold-2)}

.book-wrap{grid-column:2;grid-row:2;position:relative;justify-self:center;align-self:center;max-width:100%;touch-action:none;transform-origin:0 0;will-change:transform}
.book-wrap.zoomed{z-index:6;cursor:grab}
.book-wrap.zoomed:active{cursor:grabbing}
.zreset{position:absolute;z-index:8;top:10px;left:50%;translate:-50% 0;display:none;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:999px;
  background:rgba(4,41,26,.88);color:var(--cream);border:1px solid rgba(241,217,160,.5);font-size:13px;box-shadow:0 6px 18px rgba(0,0,0,.35)}
.zreset svg{width:18px;height:18px}
body.is-zoomed .zreset{display:inline-flex}
body.is-zoomed .title,body.is-zoomed .hint,body.is-zoomed .nav{visibility:hidden}
.book{filter:drop-shadow(0 18px 30px rgba(0,0,0,.45))}
.book.is-cover{transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.page{background:#fff;overflow:hidden}
.page img{width:100%;height:100%;display:block;object-fit:contain;user-select:none;-webkit-user-drag:none;pointer-events:none}
.page.--left::after,.page.--right::after{content:"";position:absolute;top:0;bottom:0;width:7%;pointer-events:none}
.page.--left::after{right:0;background:linear-gradient(to left,rgba(0,0,0,.16),transparent)}
.page.--right::after{left:0;background:linear-gradient(to right,rgba(0,0,0,.16),transparent)}

.loading{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:12px;font-size:14px;color:var(--gold-2)}
.loading span{width:34px;height:34px;border:2px solid rgba(241,217,160,.25);border-top-color:var(--gold-2);border-radius:50%;animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(1turn)}}

.nav{grid-row:2;width:clamp(40px,3.6vw,56px);height:clamp(40px,3.6vw,56px);border-radius:50%;display:grid;place-items:center;color:var(--cream);
  border:1px solid rgba(217,180,106,.45);background:rgba(4,41,26,.55);transition:background .2s,transform .2s,opacity .2s;z-index:5}
.nav svg{width:26px;height:26px}
.nav:hover{background:var(--gold);color:var(--green)}
.nav:active{transform:scale(.94)}
.nav[disabled]{opacity:.25;pointer-events:none}
.nav-prev{grid-column:1}.nav-next{grid-column:3}
.hint{grid-column:1/-1;grid-row:3;margin:6px 0 0;text-align:center;font-size:12.5px;color:rgba(255,247,207,.6);transition:opacity .4s}
.hint.off{opacity:0}

/* ---------- toolbar ---------- */
.bar{z-index:20;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 clamp(8px,2vw,32px) env(safe-area-inset-bottom);
  background:#03200f;border-top:1px solid rgba(217,180,106,.3)}
.bar-group{display:flex;align-items:center;gap:4px;flex:1}
.bar-group:last-child{justify-content:flex-end}
.bar-pager{flex:none;justify-content:center}
.tb{height:44px;min-width:44px;padding:0 12px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:14px;color:var(--cream);transition:background .15s,color .15s}
.tb.ic{padding:0}
.tb:hover{background:rgba(217,180,106,.16);color:var(--gold-2)}
.tb[aria-pressed="true"]{background:var(--gold);color:var(--green)}
.tb[disabled]{opacity:.3;pointer-events:none}
.pager{display:flex;align-items:center;gap:6px;font-size:14px;color:rgba(255,247,207,.75);padding:0 4px;font-variant-numeric:tabular-nums}
.pager input{width:58px;height:34px;text-align:center;font:inherit;color:var(--cream);background:rgba(255,255,255,.06);border:1px solid rgba(217,180,106,.4);border-radius:6px}
.pager input:focus{outline:none;border-color:var(--gold-2);background:rgba(255,255,255,.1)}

/* ---------- thumbnails ---------- */
.thumbs{position:fixed;left:0;right:0;bottom:var(--bar);z-index:15;background:rgba(3,32,15,.96);border-top:1px solid rgba(217,180,106,.3);
  transform:translateY(100%);transition:transform .3s cubic-bezier(.2,.7,.2,1);padding-bottom:env(safe-area-inset-bottom)}
.thumbs.open{transform:none}
.thumbs-in{display:flex;gap:12px;overflow-x:auto;padding:14px clamp(12px,2vw,32px);scroll-snap-type:x proximity;scrollbar-color:var(--gold) transparent;scrollbar-width:thin}
.th{flex:none;scroll-snap-align:center;display:grid;gap:6px;justify-items:center;font-size:12px;color:rgba(255,247,207,.7)}
.th img{height:118px;width:auto;aspect-ratio:595/842;display:block;background:#fff;border:2px solid transparent;border-radius:2px;transition:border-color .15s,transform .15s}
.th:hover img{transform:translateY(-3px)}
.th.on img{border-color:var(--gold-2)}
.th.on{color:var(--gold-2)}

/* ---------- zoom ---------- */
.zoom{position:fixed;inset:0;z-index:50;background:rgba(2,20,12,.97);display:grid;grid-template-rows:1fr auto}
.zoom[hidden]{display:none}
.zoom-scroll{overflow:auto;cursor:grab;display:grid;-webkit-overflow-scrolling:touch}
.zoom-scroll.drag{cursor:grabbing}
.zoom-pages{margin:auto;display:flex;padding:20px;gap:0}
.zoom-pages img{display:block;background:#fff;user-select:none;-webkit-user-drag:none;box-shadow:0 10px 40px rgba(0,0,0,.5)}
.zoom-bar{display:flex;align-items:center;justify-content:center;gap:8px;height:var(--bar);background:#03200f;border-top:1px solid rgba(217,180,106,.3);padding-bottom:env(safe-area-inset-bottom)}
.zoom-bar span{min-width:54px;text-align:center;font-size:14px;font-variant-numeric:tabular-nums}

.toast{position:fixed;left:50%;bottom:calc(var(--bar) + 18px);transform:translate(-50%,12px);opacity:0;pointer-events:none;z-index:60;
  background:var(--cream);color:var(--green);font-size:14px;font-weight:500;padding:10px 18px;border-radius:999px;transition:opacity .25s,transform .25s}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- fullscreen ---------- */
body.fs{grid-template-rows:0 1fr var(--bar)}
body.fs .hd{display:none}
body.fs .title{display:none}

/* ---------- mobile ---------- */
@media (max-width:860px){
  :root{--hd:54px;--bar:56px}
  .hd{background:rgba(0,22,10,.35);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
  .hd{display:flex;align-items:center;justify-content:space-between;padding:0 18px 0 21px}
  .hd-logo{position:static;width:auto;height:30px}
  .hd-logo img{width:auto}
  body::before{background:
    linear-gradient(180deg,rgba(2,18,10,.8) 0%,rgba(3,32,15,.35) 20%,rgba(3,32,15,.45) 60%,rgba(3,32,15,.95) 100%),
    url(/static/flipbook/banner-m.webp) center/cover no-repeat}
  .hd-burger{display:flex}
  .hd-menu{position:absolute;top:100%;right:0;left:0;flex-direction:column;gap:0;background:#06301f;border-bottom:1px solid rgba(217,180,106,.3);
    padding:6px 20px 14px;display:none}
  .hd.open .hd-menu{display:flex}
  .hd-menu a{padding:14px 0;font-size:14px;letter-spacing:.06em;border-bottom:1px solid rgba(255,247,207,.08)}
  .hd-menu a::after{display:none}
  .hd.open .hd-burger span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
  .hd.open .hd-burger span:nth-child(2){opacity:0}
  .hd.open .hd-burger span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
  .stage{grid-template-columns:minmax(0,1fr);padding:8px 8px 4px}
  .book-wrap{grid-column:1}
  .nav{display:none}
  .tb span{display:none}
  .tb{padding:0}
  .bar-group{gap:0}
  #first,#last,#btnShare{display:none}
  .pager input{width:46px}
  .th img{height:92px}
  .title h1{font-size:23px}
  .title-sub{font-size:13px}
}
@media (max-height:520px){
  .title,.hint{display:none}
  :root{--hd:50px;--bar:50px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation-duration:.01ms!important}}

/* one page at a time: no spine shadow */
body.portrait .page::after{display:none}