*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.5 var(--font);min-height:100vh;display:flex;flex-direction:column;
  padding-left:env(safe-area-inset-left,0px);padding-right:env(safe-area-inset-right,0px)}
[hidden]{display:none!important}
h1,h2,h3{line-height:1.25;margin:0 0 .5em;text-wrap:balance}
h1{font-size:1.45rem}h2{font-size:1.15rem}h3{font-size:1rem}
p{margin:.3em 0}a{color:var(--pri)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--acc);outline-offset:2px}
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:14px;padding:8px var(--gut);padding-top:calc(8px + env(safe-area-inset-top,0px));background:var(--surface);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--fg);flex:none}
.logo{font-size:1.7rem}.bt{display:flex;flex-direction:column;line-height:1.1}.bt b{font-size:1.02rem}.bt small{color:var(--mute);font-size:.72rem}
.nav{display:flex;gap:4px;flex:1;min-width:0;overflow-x:auto;scrollbar-width:none}
.nav a{padding:8px 13px;border-radius:999px;text-decoration:none;color:var(--mute);font-weight:600;white-space:nowrap}
.nav a:hover{background:var(--surface2)}.nav a.on{background:var(--pri-t);color:var(--pri-d)}
.who{display:flex;align-items:center;gap:8px;flex:none}
.wrap{flex:1;width:100%;max-width:1180px;margin:0 auto;padding:18px var(--gut) 90px;outline:none}
.foot{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:12px var(--gut);color:var(--mute);font-size:.8rem;border-top:1px solid var(--line)}
.bnav{display:none}
@media (max-width:760px){
  .nav{display:none}.bt small{display:none}
  .bnav{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:25;background:var(--surface);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px)}
  .bnav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:1px;padding:7px 2px;text-decoration:none;color:var(--mute);font-size:.7rem;font-weight:600}
  .bnav a i{font-style:normal;font-size:1.25rem}.bnav a.on{color:var(--pri-d)}
  .foot{padding-bottom:70px}
}
.grow{flex:1}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row.end{justify-content:flex-end}
.mute{color:var(--mute)}.sm{font-size:.86rem}.b{font-weight:700}
.stack{display:flex;flex-direction:column;gap:12px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.spin{width:30px;height:30px;border:3px solid var(--line);border-top-color:var(--pri);border-radius:50%;animation:sp .8s linear infinite;margin:0 auto 8px}
@keyframes sp{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spin{animation:none}}

/* ===== v1.6: cú mèo biểu tượng + cú kéo được ===== */
.brand .logo{display:inline-flex;flex:none;width:42px;height:42px;background:radial-gradient(circle at 50% 35%,#fff,var(--pri-t));border-radius:50%;box-shadow:0 0 0 2px var(--pri),0 2px 6px rgba(0,0,0,.18);overflow:hidden;align-items:center;justify-content:center;font-size:0;line-height:0}
.brand .logo svg{width:38px;height:38px;display:block;overflow:visible}
.brand .logo .ow-eye{animation:owBlink 5s infinite}
#owlPet{position:fixed;left:0;top:0;width:78px;z-index:10;touch-action:none;cursor:grab;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent;outline:0}
#owlPet[hidden]{display:none}
#owlPet.drag{cursor:grabbing;z-index:11}
#owlPet.back{transition:left 1.4s cubic-bezier(.45,.05,.25,1),top 1.4s cubic-bezier(.3,-.45,.3,1.25)}
#owlPet .op-in{transform-origin:50% 90%;transition:transform .25s ease}
#owlPet.drag .op-in{transform:scale(1.14) rotate(var(--tilt,0deg));transition:transform .08s linear}
#owlPet svg{width:100%;height:auto;display:block;overflow:visible;pointer-events:none;filter:drop-shadow(0 4px 5px rgba(0,0,0,.2))}
#owlPet:focus-visible .op-in{outline:3px solid #f4c430;outline-offset:2px;border-radius:14px}
#owlPet .ow-wing,#owlPet .ow-wing2{transform-box:fill-box;transform-origin:85% 12%}
#owlPet .ow-wing2{animation:none}
#owlPet.drag .ow-wing,#owlPet.go .ow-wing{animation:owFlap .16s ease-in-out infinite alternate}
#owlPet.drag .ow-wing2,#owlPet.go .ow-wing2{animation:owFlap .16s ease-in-out infinite alternate-reverse}
#owlPet.drag .ow-bob,#owlPet.go .ow-bob{animation:none}
#owlPet.drag .ow-sh,#owlPet.go .ow-sh{opacity:.05}
#owlPet.hop .op-in{animation:owHop .5s cubic-bezier(.3,.7,.4,1)}
#owlPet.land .op-in{animation:owLand .55s ease-out}
#owlPet .op-bub{position:absolute;right:70%;bottom:78%;width:max-content;max-width:190px;background:#fff;color:var(--fg);border:2px solid var(--pri);border-radius:14px 14px 4px 14px;padding:6px 10px;font:700 .82rem/1.35 inherit;box-shadow:0 3px 10px rgba(0,0,0,.18);opacity:0;transform:translateY(6px) scale(.9);transform-origin:100% 100%;transition:opacity .2s,transform .2s;pointer-events:none}
#owlPet .op-bub.on{opacity:1;transform:none}
#owlPet.lf .op-bub{right:auto;left:70%;border-radius:14px 14px 14px 4px;transform-origin:0 100%}
.owsp{position:fixed;z-index:12;pointer-events:none;font-size:14px;line-height:1;color:#f4c430;text-shadow:0 0 4px rgba(244,196,48,.9);animation:owSp .9s ease-out forwards}
@keyframes owFlap{from{transform:rotate(-8deg)}to{transform:rotate(26deg)}}
@keyframes owHop{0%{transform:translateY(0) scale(1,1)}25%{transform:translateY(-18px) scale(.95,1.08)}55%{transform:translateY(0) scale(1.08,.92)}75%{transform:translateY(-6px)}100%{transform:none}}
@keyframes owLand{0%{transform:scale(1.12,.84)}35%{transform:scale(.94,1.08)}65%{transform:scale(1.03,.98)}100%{transform:none}}
@keyframes owSp{0%{opacity:1;transform:translate(0,0) scale(.6) rotate(0)}100%{opacity:0;transform:translate(var(--dx,0),var(--dy,-24px)) scale(1.1) rotate(80deg)}}
@media (max-width:560px){#owlPet{width:62px}.brand .logo{width:36px;height:36px}.brand .logo svg{width:32px;height:32px}}
@media (prefers-reduced-motion:reduce){#owlPet.back{transition:left .3s linear,top .3s linear}#owlPet.drag .ow-wing,#owlPet.go .ow-wing,#owlPet.drag .ow-wing2,#owlPet.go .ow-wing2,#owlPet.hop .op-in,#owlPet.land .op-in,.brand .logo .ow-eye{animation:none}.owsp{display:none}}

#owlPet .op-ring{position:absolute;left:50%;top:55%;width:120%;aspect-ratio:1;margin:-60% 0 0 -60%;border-radius:50%;border:3px solid #f4c430;opacity:0;pointer-events:none}
#owlPet.drag .op-ring{animation:owRing .85s ease-out infinite}
#owlPet.drag svg{filter:drop-shadow(0 0 8px rgba(244,196,48,.95)) drop-shadow(0 0 20px rgba(255,140,0,.7))}
@keyframes owRing{0%{opacity:.9;transform:scale(.55)}100%{opacity:0;transform:scale(1.7)}}
.owtr{position:fixed;z-index:9;pointer-events:none;width:26px;height:26px;border-radius:50%;background:radial-gradient(circle,rgba(244,196,48,.75),rgba(244,196,48,0) 70%);animation:owTr .7s ease-out forwards}
@keyframes owTr{0%{opacity:.9;transform:scale(1)}100%{opacity:0;transform:scale(2.2)}}
@media (prefers-reduced-motion:reduce){#owlPet.drag .op-ring{animation:none}.owtr{display:none}}

.ow-bob{animation:owBob 2.8s ease-in-out infinite;transform-origin:80px 150px}
.ow-eye{animation:owBlink 5s infinite;transform-box:fill-box;transform-origin:center}
@keyframes owBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
@keyframes owBlink{0%,92%,100%{transform:scaleY(1)}95%{transform:scaleY(.08)}}
@media (prefers-reduced-motion:reduce){.ow-bob,.ow-eye{animation:none}}