:root{
  --bg:#f4f1ff;--card:#fff;--ink:#241f3d;--muted:#6f6a8a;--line:#e3ddf7;--other:#f1edff;
  --pri:#6c4cf5;--pri2:#9b5cf6;--danger:#e5484d;--ok:#30a46c;
  --wall1:#c9e6ff;--wall2:#e6dcff;--floor1:#c4b2ff;--floor2:#a58ef5;
  --shadow:0 6px 24px rgba(60,40,140,.12);
}
@media (prefers-color-scheme:dark){:root{
  --bg:#14111f;--card:#1e1a2e;--ink:#ece8ff;--muted:#a49dc4;--line:#322b4d;--other:#2a2440;
  --wall1:#26205a;--wall2:#3a2a6b;--floor1:#3b2f72;--floor2:#2a2156;--shadow:0 6px 24px rgba(0,0,0,.45);
}}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font:15px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
button,input,select{font:inherit;color:inherit}
input,select{border:1px solid var(--line);background:var(--card);border-radius:12px;padding:10px 12px;width:100%;min-width:0}
.btn{border:0;border-radius:12px;padding:10px 14px;cursor:pointer;background:var(--other);font-weight:600;white-space:nowrap}
.btn.primary{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff}
.btn.ghost{background:transparent;border:1px solid var(--line)}
.btn.danger{background:var(--danger);color:#fff}
.btn.sm{padding:6px 10px;font-size:13px;border-radius:10px}
.btn.big{width:100%;padding:14px;font-size:16px}
.btn:disabled{opacity:.6;cursor:wait}
button:active{transform:scale(.94)}
:focus-visible{outline:3px solid rgba(108,76,245,.5);outline-offset:2px}
.muted{color:var(--muted);font-size:13px}

/* ---------- Sảnh ---------- */
#lobby{min-height:100%;display:flex;justify-content:center;padding:calc(24px + env(safe-area-inset-top)) 16px calc(40px + env(safe-area-inset-bottom))}
.lobby-card{width:100%;max-width:720px}
.brand{display:flex;gap:14px;align-items:center;margin-bottom:18px}
.logo{font-size:38px;width:64px;height:64px;flex:none;display:grid;place-items:center;border-radius:20px;background:linear-gradient(135deg,var(--pri),var(--pri2));box-shadow:var(--shadow)}
h1{margin:0;font-size:26px}
.brand p{margin:2px 0 0;color:var(--muted)}
.step{background:var(--card);border-radius:20px;padding:18px;box-shadow:var(--shadow);margin-bottom:14px}
.step h2{font-size:16px;margin:0 0 12px}
.editor{display:grid;grid-template-columns:150px 1fr;gap:18px}
@media (max-width:560px){.editor{grid-template-columns:1fr}}
.editor-preview{display:flex;flex-direction:column;align-items:center;gap:8px}
.av-preview{width:130px;height:182px;border-radius:16px;background:radial-gradient(ellipse at 50% 85%,var(--wall2),transparent 70%)}
.av-preview svg{width:100%;height:100%;display:block}
.field{display:block;margin-bottom:12px}
.field>span:first-child{display:block;font-size:13px;color:var(--muted);margin-bottom:4px;font-weight:600}
.row{display:flex;gap:6px}
.opt-row{margin-bottom:10px}
.opt-label{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:4px}
.swatches{display:flex;flex-wrap:wrap;gap:6px}
.sw{border:2px solid transparent;cursor:pointer;background:var(--other);border-radius:999px;padding:0}
.sw.color{width:30px;height:30px;background:var(--c);box-shadow:inset 0 0 0 1px rgba(0,0,0,.12)}
.sw.text{padding:5px 11px;font-size:13px}
.sw[aria-checked=true]{border-color:var(--pri)}
.sw.color[aria-checked=true]{box-shadow:inset 0 0 0 3px var(--card)}
.sw.text[aria-checked=true]{background:var(--pri);color:#fff}
.check{display:flex;gap:8px;align-items:center;font-size:14px;color:var(--muted);cursor:pointer}
.check input{width:auto}
.strength{margin:-6px 0 8px;font-size:13px;font-weight:600;min-height:1em}
.strength.s0{color:var(--danger)}.strength.s1{color:#d9822b}.strength.s2{color:var(--ok)}
.hint{font-size:13px;color:var(--muted);margin:0 0 12px}
.err{color:var(--danger);font-weight:600}
.howto summary{cursor:pointer;font-weight:700}
.howto ul{padding-left:18px;margin:10px 0 0;color:var(--muted)}
.howto li{margin-bottom:6px}
.howto b{color:var(--ink)}

/* ---------- Phòng ---------- */
#room{display:flex;flex-direction:column;height:100vh;height:100dvh}
.room-head{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:calc(8px + env(safe-area-inset-top)) calc(12px + env(safe-area-inset-right)) 8px calc(12px + env(safe-area-inset-left));background:var(--card);border-bottom:1px solid var(--line);flex-wrap:wrap}
.room-title{display:flex;align-items:center;gap:8px;min-width:0}
.room-title b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:40vw}
.dot{width:9px;height:9px;border-radius:50%;background:var(--danger);flex:none}
.dot.on{background:var(--ok)}
.head-actions{display:flex;gap:6px;flex-wrap:wrap}
.room-body{flex:1;display:grid;grid-template-columns:minmax(0,1fr) 380px;min-height:0}
@media (max-width:860px){.room-body{grid-template-columns:minmax(0,1fr);grid-template-rows:38vh minmax(0,1fr)}}
.room-body>*{min-width:0}

.scene{position:relative;isolation:isolate;overflow:hidden;cursor:pointer;user-select:none;-webkit-user-select:none;touch-action:manipulation;
  background:linear-gradient(180deg,var(--wall1) 0,var(--wall2) 34%,var(--floor1) 34%,var(--floor2) 100%)}
.window{position:absolute;left:8%;top:5%;width:20%;max-width:160px;aspect-ratio:4/3;border-radius:12px;border:6px solid rgba(255,255,255,.7);
  background:linear-gradient(rgba(255,255,255,.7),rgba(255,255,255,.7)) center/4px 100% no-repeat,
             linear-gradient(rgba(255,255,255,.7),rgba(255,255,255,.7)) center/100% 4px no-repeat,
             linear-gradient(160deg,#9fd8ff,#ffd6f5)}
/* ---------- Cảnh ---------- */
.decor{position:absolute;inset:0;pointer-events:none;z-index:0;animation:fadeIn .5s ease}
@keyframes fadeIn{from{opacity:0}}
.scene{--dk:1;transition:background .5s}
@media (max-width:860px){.scene{--dk:.68}}
.deco{position:absolute;transform:translateX(-50%);line-height:1;pointer-events:none}
.deco.drift{animation:drift 10s ease-in-out infinite}
.deco.twinkle{animation:twinkle 2.4s ease-in-out infinite}
.deco.flutter{animation:flutter 3s ease-in-out infinite}
.deco.flicker{animation:flicker .6s ease-in-out infinite}
.deco.swing{animation:swing 3s ease-in-out infinite;transform-origin:50% 0}
.deco.fall{animation:fall 7s linear infinite;opacity:0}
.deco.bob{animation:bob 3s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translateX(-50%)}50%{transform:translateX(-10%)}}
@keyframes twinkle{50%{opacity:.25}}
@keyframes flutter{0%,100%{transform:translate(-50%,0) rotate(-10deg)}50%{transform:translate(-10%,-16px) rotate(10deg)}}
@keyframes flicker{0%,100%{transform:translateX(-50%) scale(1)}50%{transform:translateX(-50%) scale(1.14)}}
@keyframes swing{0%,100%{transform:translateX(-50%) rotate(-7deg)}50%{transform:translateX(-50%) rotate(7deg)}}
@keyframes fall{0%{transform:translate(-50%,-20px);opacity:0}10%{opacity:1}100%{transform:translate(-20%,60vh) rotate(180deg);opacity:0}}
@keyframes bob{0%,100%{transform:translateX(-50%)}50%{transform:translate(-50%,-6px)}}

.scene.sc-bien{background:linear-gradient(180deg,#8fd3ff 0,#d0efff 26%,#2c9fd6 26%,#5cc6ea 40%,#f7e3a8 40%,#eccb80 100%)}
.scene.sc-vuon{background:linear-gradient(180deg,#9fd8ff 0,#e4f6ff 32%,#93d66e 32%,#5bb046 100%)}
.scene.sc-dem{background:
  radial-gradient(1.6px 1.6px at 12% 9%,#fff 99%,transparent),radial-gradient(1.2px 1.2px at 28% 22%,#fff 99%,transparent),
  radial-gradient(1.8px 1.8px at 46% 12%,#fff 99%,transparent),radial-gradient(1.2px 1.2px at 63% 26%,#fff 99%,transparent),
  radial-gradient(1.5px 1.5px at 74% 8%,#fff 99%,transparent),radial-gradient(1.2px 1.2px at 92% 20%,#fff 99%,transparent),
  radial-gradient(1.4px 1.4px at 36% 4%,#fff 99%,transparent),radial-gradient(1.2px 1.2px at 6% 28%,#fff 99%,transparent),
  linear-gradient(180deg,#0a0f2e 0,#232766 36%,#2a3a2c 36%,#16241a 100%)}
.scene.sc-cafe{background:repeating-linear-gradient(90deg,rgba(0,0,0,.08) 0 2px,transparent 2px 72px) bottom/100% 64% no-repeat,
  linear-gradient(180deg,#6e4430 0,#8f5e40 36%,#c48b58 36%,#a46c40 100%)}
.scene.sc-tuyet{background:linear-gradient(180deg,#bcd6ef 0,#eaf3fc 34%,#fff 34%,#dfe9f4 100%)}

.scene-btn{position:absolute;left:8px;bottom:8px;z-index:5000;border:0;border-radius:999px;padding:6px 12px;background:rgba(20,16,40,.6);color:#fff;font-size:13px;font-weight:600;cursor:pointer}
.scene-picker{position:absolute;left:8px;bottom:46px;z-index:5001;display:grid;grid-template-columns:repeat(3,auto);gap:6px;background:var(--card);padding:8px;border-radius:16px;box-shadow:var(--shadow);cursor:default}
.scene-picker button{display:flex;flex-direction:column;align-items:center;gap:2px;border:2px solid transparent;background:var(--other);border-radius:12px;padding:6px 8px;cursor:pointer;font-size:12px;color:var(--ink);min-width:80px}
.scene-picker button span{font-size:24px;line-height:1.1}
.scene-picker button[aria-pressed=true]{border-color:var(--pri)}
@media (max-width:860px){.scene-picker button{min-width:70px;padding:4px 6px}.scene-picker button span{font-size:20px}}
.rug{position:absolute;left:50%;top:70%;width:62%;height:36%;transform:translate(-50%,-50%);border-radius:50%;
  background:radial-gradient(rgba(255,255,255,.28),rgba(255,255,255,.1) 68%,transparent 70%);pointer-events:none}
.scene-hint{position:absolute;right:8px;bottom:10px;margin:0;font-size:12px;color:#fff;background:rgba(20,16,40,.5);padding:2px 9px;border-radius:999px;pointer-events:none;z-index:4999}

.avatar{position:absolute;width:86px;transform:translate(-50%,-100%);transition:left 1.1s ease,top 1.1s ease}
.av-body{width:86px;height:120px}
.av-body svg{width:100%;height:100%;display:block}
@media (max-width:860px){.avatar,.av-body{width:62px}.av-body{height:87px}}
.tag{position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);white-space:nowrap;font-size:12px;font-weight:700;background:rgba(0,0,0,.5);color:#fff;padding:1px 8px;border-radius:999px;max-width:140px;overflow:hidden;text-overflow:ellipsis}
.avatar.me .tag{background:var(--pri)}
.bubble{position:absolute;left:50%;bottom:100%;transform:translate(-50%,8px) scale(.85);opacity:0;transition:.2s;background:#fff;color:#241f3d;padding:6px 10px;border-radius:14px;font-size:13px;width:max-content;max-width:180px;box-shadow:0 4px 14px rgba(0,0,0,.18);pointer-events:none;overflow-wrap:anywhere}
.bubble::after{content:"";position:absolute;left:50%;top:100%;border:6px solid transparent;border-top-color:#fff;transform:translateX(-50%)}
.bubble.show{opacity:1;transform:translate(-50%,-2px) scale(1)}

.anim-vui .av-body,.anim-cuoi .av-body{animation:bounce .45s ease 3}
.anim-gian .av-body{animation:shake .12s linear 6}
.anim-buon .av-body{animation:droop 1.2s ease}
.anim-ngac .av-body{animation:jump .5s ease}
.anim-yeu .av-body,.anim-ngai .av-body{animation:sway .9s ease 2}
.walk .av-body{animation:walk .3s ease-in-out infinite}
@keyframes bounce{50%{transform:translateY(-12px)}}
@keyframes shake{25%{transform:translateX(-4px) rotate(-3deg)}75%{transform:translateX(4px) rotate(3deg)}}
@keyframes droop{50%{transform:translateY(5px) scaleY(.95)}}
@keyframes jump{40%{transform:translateY(-22px)}}
@keyframes sway{25%{transform:rotate(-6deg)}75%{transform:rotate(6deg)}}
@keyframes walk{50%{transform:translateY(-4px) rotate(2deg)}}
.fly{position:absolute;font-size:28px;pointer-events:none;animation:fly 1.9s ease-out forwards;z-index:1000}
@keyframes fly{0%{opacity:0;transform:translate(-50%,0) scale(.5)}15%{opacity:1;transform:translate(-50%,-10px) scale(1.2)}100%{opacity:0;transform:translate(calc(-50% + var(--dx,0px)),-150px) scale(1)}}

.side{display:flex;flex-direction:column;min-height:0;background:var(--card);border-left:1px solid var(--line)}
.log{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px}
.msg{display:flex;gap:6px;align-items:flex-end;max-width:92%;transition:opacity .5s}
.msg.mine{align-self:flex-end;flex-direction:row-reverse}
.msg.gone{opacity:0}
.mini{width:34px;height:35px;flex:none}
.mini svg{width:100%;height:100%;display:block}
.body{background:var(--other);padding:7px 11px;border-radius:16px 16px 16px 4px;min-width:0}
.mine .body{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border-radius:16px 16px 4px 16px}
.name{font-size:12px;font-weight:700;color:var(--pri)}
.mine .name{display:none}
.text{white-space:pre-wrap;overflow-wrap:anywhere}
.meta{font-size:11px;opacity:.7;margin-top:2px}
.reacts{display:flex;gap:4px;flex-wrap:wrap;margin-top:4px}
.reacts:empty{display:none}
.chip{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:0 7px;font-size:12px;cursor:pointer}
.chip.on{border-color:var(--pri);background:var(--other)}
.react-btn{opacity:0;border:0;background:none;cursor:pointer;font-size:15px;padding:4px;color:var(--muted);transition:opacity .15s;flex:none}
.msg:hover .react-btn,.react-btn:focus-visible{opacity:1}
@media (hover:none){.react-btn{opacity:.65}}
.sys{align-self:center;font-size:12px;color:var(--muted);background:var(--other);padding:3px 10px;border-radius:999px;text-align:center}
.typing{min-height:18px;font-size:12px;color:var(--muted);padding:0 14px}
.bars{border-top:1px solid var(--line);padding:8px 10px calc(8px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:6px}
.emo-bar,.icon-bar{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.emo-bar::-webkit-scrollbar,.icon-bar::-webkit-scrollbar{display:none}
.emo-bar button{flex:none;border:1px solid var(--line);background:var(--card);border-radius:12px;font-size:20px;width:40px;height:38px;cursor:pointer;padding:0}
.emo-bar button[aria-pressed=true]{border-color:var(--pri);background:var(--other);box-shadow:0 0 0 2px rgba(108,76,245,.25)}
.icon-bar button{flex:none;border:0;background:transparent;font-size:22px;width:38px;height:34px;cursor:pointer;padding:0;border-radius:10px}
.icon-bar button:hover{background:var(--other)}
.send{display:flex;gap:6px}
.send select{width:auto;flex:none;padding:10px 6px;font-size:13px}

.picker{position:fixed;z-index:50;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:999px;padding:4px;display:flex;gap:2px}
.picker button{border:0;background:none;font-size:22px;padding:4px 5px;cursor:pointer;border-radius:50%}
.picker button:hover{background:var(--other)}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);display:grid;place-items:center;z-index:60;padding:16px}
.modal-card{background:var(--card);border-radius:20px;padding:18px;width:100%;max-width:640px;max-height:90vh;overflow:auto}
.modal-actions{display:flex;justify-content:flex-end;margin-top:8px}
.veil{position:fixed;inset:0;z-index:10000;background:var(--bg);display:grid;place-items:center;text-align:center;padding:16px}
.unlock{display:flex;flex-direction:column;align-items:center;gap:10px;width:min(320px,100%)}
.unlock p{margin:0;color:var(--muted)}
.unlock p b{color:var(--ink);font-size:18px}
.veil-ico{font-size:52px}
.bio-row{margin:0 0 12px;color:var(--ink)}
.hint-inline{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#241f3d;color:#fff;padding:10px 16px;border-radius:12px;z-index:70;max-width:calc(100% - 32px);font-size:14px;box-shadow:var(--shadow)}
@media (max-width:520px){.head-actions .btn.sm{padding:5px 8px;font-size:12px}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}