/* Home hero in 3D: a pop-up diorama with real books (spine, page edges), depth-sorted petals and sparkles,
   pointer / scroll / drag parallax. Only transform and opacity animate. Static pose under reduced motion. */
.khero.k3 .kstage{perspective:1100px;perspective-origin:50% 40%;overflow:visible;touch-action:pan-y;-webkit-tap-highlight-color:transparent}
.khero.k3 .k3p,.khero.k3 .k3i,.khero.k3 .kfloat{position:absolute;inset:0;transform-style:preserve-3d}
.khero.k3 .k3p{will-change:transform}
.khero.k3 .k3i{animation:k3sway 11s ease-in-out infinite}
@keyframes k3sway{0%,100%{transform:rotateY(-5deg) rotateX(1deg) translateY(0)}50%{transform:rotateY(5deg) rotateX(-1deg) translateY(-7px)}}
.khero.k3 .kfloat{animation:none}

/* the diorama behind the books */
.khero.k3 .kz-scene{position:absolute;left:2%;right:2%;top:3%;bottom:8%;border-radius:28px;overflow:hidden;transform:translateZ(-220px) scale(1.2);
  background:linear-gradient(180deg,#C6E6EB 0%,#F6EBD3 62%,#FBE3C2 100%);box-shadow:0 30px 60px rgba(22,32,44,.14)}
.khero.k3 .kz-scene svg{position:absolute;inset:0;width:100%;height:100%;display:block}
.khero.k3 .kz-sun{transform-origin:300px 112px;animation:k3sun 9s ease-in-out infinite}
@keyframes k3sun{0%,100%{transform:scale(1)}50%{transform:scale(1.07)}}
.khero.k3 .kz-cl1{animation:k3cl 26s linear infinite alternate}.khero.k3 .kz-cl2{animation:k3cl 34s linear infinite alternate-reverse}
@keyframes k3cl{from{transform:translateX(-18px)}to{transform:translateX(26px)}}
.khero.k3 .kz-ground{position:absolute;left:14%;right:14%;bottom:5%;height:34px;border-radius:50%;background:radial-gradient(closest-side,rgba(22,32,44,.30),rgba(22,32,44,0));transform:translateZ(-4px)}

/* books as solid objects */
.khero.k3 .kbook{--t:26px;overflow:visible;background:none;box-shadow:none;border-radius:0;opacity:1;transform-style:preserve-3d;cursor:pointer;
  transition:transform 1s var(--ease);animation:kbIn 1s var(--ease) backwards}
.khero.k3 .kbook:nth-child(1){animation-delay:.05s}.khero.k3 .kbook:nth-child(2){animation-delay:.2s}.khero.k3 .kbook:nth-child(3){animation-delay:.35s}.khero.k3 .kbook:nth-child(4){animation-delay:.5s}
@keyframes kbIn{from{opacity:0;transform:translate3d(-50%,-50%,-460px) rotateY(80deg) rotateX(12deg)}}
.khero.k3 .kbook.p0{transform:translate3d(-50%,-50%,80px) rotateY(-14deg) rotateX(3deg)}
.khero.k3 .kbook.p1{transform:translate3d(8%,-50%,-40px) rotateY(-34deg) scale(.88)}
.khero.k3 .kbook.p2{transform:translate3d(-108%,-50%,-70px) rotateY(28deg) scale(.88)}
.khero.k3 .kbook.p3{transform:translate3d(-50%,-50%,-260px) scale(.7)}
.khero.k3 .kbook>*{position:absolute;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.khero.k3 .kb-f{inset:0;border-radius:5px 14px 14px 5px;overflow:hidden;background:#fff;transform:translateZ(calc(var(--t) / 2));box-shadow:inset 6px 0 8px -6px rgba(0,0,0,.35)}
.khero.k3 .kb-f svg{display:block;width:100%;height:100%}
.khero.k3 .kb-f::before{content:"";position:absolute;left:0;top:0;bottom:0;width:7px;background:linear-gradient(90deg,rgba(0,0,0,.28),rgba(255,255,255,.18) 55%,rgba(0,0,0,0));z-index:2}
.khero.k3 .kb-sh{position:absolute;inset:0;background:#10213A;opacity:0;transition:opacity 1s var(--ease);z-index:3;pointer-events:none}
.khero.k3 .kbook.p1 .kb-sh,.khero.k3 .kbook.p2 .kb-sh{opacity:.16}.khero.k3 .kbook.p3 .kb-sh{opacity:.35}
.khero.k3 .kb-gl{position:absolute;top:-10%;bottom:-10%;left:-60%;width:70%;z-index:4;pointer-events:none;
  background:linear-gradient(100deg,rgba(255,255,255,0),rgba(255,255,255,.34) 50%,rgba(255,255,255,0));transform:translateX(var(--sx,0px)) skewX(-12deg)}
.khero.k3 .kb-b{inset:0;border-radius:14px 5px 5px 14px;background:#1E3A5F;transform:translateZ(calc(var(--t) / -2)) rotateY(180deg)}
.khero.k3 .kb-s{left:calc(var(--t) / -2);top:0;width:var(--t);height:100%;transform:rotateY(-90deg);border-radius:3px;
  background:linear-gradient(180deg,#27487A,#1B3358)}
.khero.k3 .kb-pg,.khero.k3 .kb-tp,.khero.k3 .kb-bm{background:repeating-linear-gradient(90deg,#FBF7EC 0 2px,#E9E1CC 2px 3px)}
.khero.k3 .kb-pg{right:calc(var(--t) / -2);top:1.5%;width:var(--t);height:97%;transform:rotateY(90deg)}
.khero.k3 .kb-tp{top:calc(var(--t) / -2);left:1.5%;width:97%;height:var(--t);transform:rotateX(90deg);background:repeating-linear-gradient(0deg,#FBF7EC 0 2px,#E9E1CC 2px 3px)}
.khero.k3 .kb-bm{bottom:calc(var(--t) / -2);left:1.5%;width:97%;height:var(--t);transform:rotateX(-90deg);background:repeating-linear-gradient(0deg,#F1EAD8 0 2px,#DCD2BA 2px 3px)}


/* petals and sparkles at different depths */
.khero.k3 .kz-pt{position:absolute;top:2%;left:var(--x);width:16px;height:16px;opacity:0;animation:k3pt var(--d) linear var(--dl) infinite;transform:translate3d(0,0,var(--z))}
.khero.k3 .kz-pt svg{display:block;width:100%;height:100%}
@keyframes k3pt{0%{opacity:0;transform:translate3d(0,0,var(--z)) rotate(0)}12%{opacity:.95}85%{opacity:.9}100%{opacity:0;transform:translate3d(var(--dx),var(--fall,300px),var(--z)) rotate(520deg)}}
.khero.k3 .kz-sp{position:absolute;left:var(--x);top:var(--y);width:var(--s,14px);height:var(--s,14px);opacity:0;transform:translate3d(0,0,var(--z));animation:k3sp 3.4s ease-in-out var(--dl) infinite}
.khero.k3 .kz-sp svg{display:block;width:100%;height:100%}
@keyframes k3sp{0%,100%{opacity:0;transform:translate3d(0,0,var(--z)) scale(.3) rotate(0)}50%{opacity:1;transform:translate3d(0,0,var(--z)) scale(1) rotate(45deg)}}

/* call-to-action polish */
.khero.k3 .kform button{position:relative;overflow:hidden;transition:transform .25s var(--ease),background .2s,box-shadow .25s}
.khero.k3 .kform button::after{content:"";position:absolute;top:0;bottom:0;left:-70%;width:50%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-18deg);animation:k3shine 6s ease-in-out 1.6s infinite}
@keyframes k3shine{0%,70%{transform:translateX(0) skewX(-18deg)}100%{transform:translateX(520%) skewX(-18deg)}}
.khero.k3 .kform button:hover{box-shadow:0 8px 20px rgba(20,92,99,.35)}

.khero.k3.k3-off *,.khero.k3.k3-off *::after{animation-play-state:paused!important}
.khero.k3.k3-lite .kz-pt,.khero.k3.k3-lite .kz-sp{display:none}

@media (max-width:900px){
  .khero.k3 .kstage{perspective:800px;max-width:520px;width:100%;margin-inline:auto}
  .khero.k3 .kbook{--t:18px}
  .khero.k3 .kz-pt{--fall:210px}
}
@media (prefers-reduced-motion:reduce){
  .khero.k3 .k3i{animation:none;transform:rotateY(-4deg)}
  .khero.k3 .kbook{animation:none;transition:none}
  .khero.k3 .kz-pt,.khero.k3 .kz-sp,.khero.k3 .kform button::after,.khero.k3 .kz-sun,.khero.k3 .kz-cl1,.khero.k3 .kz-cl2{animation:none!important}
  .khero.k3 .kz-pt,.khero.k3 .kz-sp{display:none}
}

/* ===== desktop only (>=1100px): a full-bleed hero that fills the first screen ===== */
.khero .kbg,.khero .kcap{display:none}
@media (min-width:1100px){
  :root{--kpad:clamp(28px,3.2vw,72px)}
  html[data-kview="library"] main{max-width:none;padding-inline:var(--kpad)}
  html[data-kview="library"] .khero{margin:-24px calc(var(--kpad) * -1) 0;border-radius:0;border-width:0 0 1px;box-shadow:none;
    min-height:clamp(600px,calc(100vh - 57px),980px);display:flex;align-items:center}
  .khero.k3 .kgrid{width:100%;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(24px,4vw,80px);padding:clamp(44px,6vh,96px) clamp(40px,6vw,150px)}
  .khero.k3 .kcopy{gap:clamp(18px,2.4vh,30px)}
  .khero.k3 h1{font-size:clamp(60px,5.9vw,116px);line-height:1.01;max-width:10.5ch;letter-spacing:-.015em}
  .khero.k3 .klede{font-size:clamp(18px,1.35vw,25px);max-width:38ch}
  .khero.k3 .kpill{height:36px;font-size:14px}
  .khero.k3 .kform{max-width:min(660px,100%);padding:8px;border-radius:22px}
  .khero.k3 .kform label{font-size:13px}
  .khero.k3 .kform input{height:56px;font-size:clamp(20px,1.5vw,26px)}
  .khero.k3 .kform button{height:56px;padding:0 28px;font-size:17px;border-radius:15px}
  .khero.k3 .kstats b{font-size:clamp(32px,2.8vw,54px)}
  .khero.k3 .kstats>span{padding:0 clamp(22px,2.4vw,44px);font-size:14px}
  .khero.k3 .kstats>span:first-child{padding-left:0}
  .khero.k3 .kstage{height:clamp(500px,68vh,860px);perspective:1500px}
  .khero.k3 .kbook{width:clamp(250px,20.5vw,420px);--t:36px}
  .khero.k3 .kz-scene{display:none}
  .khero.k3 .kz-ground{height:60px;left:8%;right:8%}
  /* backdrop landscape across the full hero, with a wash so the headline stays crisp */
  .khero .kbg{display:block;position:absolute;inset:0;z-index:-1;overflow:hidden;background:linear-gradient(180deg,#CBE8EE 0%,#F5EBD3 60%,#FBE2C0 100%)}
  .khero .kbg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.92) 0%,rgba(255,255,255,.62) 34%,rgba(255,255,255,0) 60%)}
  .khero .kbg svg{position:absolute;inset:0;width:100%;height:100%;display:block}
  .khero .kbs{transform-origin:1240px 250px;animation:k3sun 9s ease-in-out infinite}
  .khero .kbc1{animation:k3cl 28s linear infinite alternate}.khero .kbc2{animation:k3cl 36s linear infinite alternate-reverse}
  .khero .kbh{will-change:transform}
  .khero .kbh1{transform:translate3d(calc(var(--hx,0) * -10px),calc(var(--hy,0) * -4px),0)}
  .khero .kbh2{transform:translate3d(calc(var(--hx,0) * -24px),calc(var(--hy,0) * -8px),0)}
  .khero .kbh3{transform:translate3d(calc(var(--hx,0) * -42px),calc(var(--hy,0) * -12px),0)}
  .khero .kbh{transition:transform .5s cubic-bezier(.2,.8,.2,1)}
  .khero::before,.khero::after{display:none}
  /* now-showing caption */
  .khero.k3 .kcap{display:flex;position:absolute;left:50%;bottom:22px;transform:translateX(-50%);z-index:7;align-items:center;gap:12px;padding:10px 12px 10px 20px;border-radius:999px;cursor:pointer;
    background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.9);box-shadow:0 12px 36px rgba(22,32,44,.16);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);white-space:nowrap}
  .khero.k3 .kcap-t{font:600 17px var(--ui);color:var(--ink);max-width:22ch;overflow:hidden;text-overflow:ellipsis}
  .khero.k3 .kcap-p{font:600 12px var(--ui);padding:4px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
  .khero.k3 .kcap-go{font:600 14px var(--ui);padding:9px 16px;border-radius:999px;background:var(--accent);color:#fff;font-style:normal}
  .khero.k3 .kcap.kcap-in{animation:kcapIn .6s var(--ease) both}
  @keyframes kcapIn{from{opacity:0;transform:translateX(-50%) translateY(14px)}}
  .khero.k3 .kdots{bottom:2px}
}
@media (min-width:1100px) and (prefers-reduced-motion:reduce){.khero .kbs,.khero .kbc1,.khero .kbc2{animation:none}}
@media (min-width:1700px){.khero.k3 .kstage{height:clamp(560px,70vh,900px)}}