Keyboard Avoidance

<div class="stage"><div class="phone"><div class="notch"></div><div class="screen" id="screen">
<div class="kbcontent" id="kbcontent">
  <div class="msg left"></div><div class="msg right"></div><div class="msg left"></div>
</div>
<div class="inputrow" id="inputrow">
  <div class="inputfake" id="inputfake">Message...</div><div class="sendbtn">&#8593;</div>
</div>
<div class="keyboard" id="keyboard"></div></div><div class="home"></div></div></div>

.stage{position:absolute;inset:0;display:grid;place-items:center;overflow:hidden}
.phone{position:relative;height:90vmin;max-height:640px;aspect-ratio:9/19.5;background:#08080c;
  border-radius:20%/8.6%;box-shadow:0 0 0 2px rgba(255,255,255,.08) inset,0 12px 30px rgba(0,0,0,.35)}
.phone .notch{position:absolute;left:50%;top:0;transform:translateX(-50%);width:38%;height:5.6%;
  background:#08080c;border-radius:0 0 46% 46%;z-index:80}
.phone .screen{position:absolute;top:7.6%;left:3%;right:3%;bottom:3%;border-radius:11%/4.6%;overflow:hidden;
  background:var(--surface);color:var(--fg)}
.phone .home{position:absolute;left:50%;bottom:1.1%;transform:translateX(-50%);width:32%;height:3px;
  border-radius:2px;background:rgba(255,255,255,.45);z-index:80}
.pfx{position:absolute;left:0;top:0;width:16px;height:16px;margin:-8px 0 0 -8px;border-radius:50%;
  background:color-mix(in srgb,var(--accent) 55%,transparent);
  box-shadow:0 0 0 6px color-mix(in srgb,var(--accent) 15%,transparent);pointer-events:none;z-index:999;
  transition:opacity .2s}
.pfx.hold{width:30px;height:30px;margin:-15px 0 0 -15px;
  box-shadow:0 0 0 9px color-mix(in srgb,var(--accent) 20%,transparent);
  transition:width .5s linear,height .5s linear,margin .5s linear,box-shadow .5s linear,opacity .2s}

.kbcontent{position:absolute;top:0;left:0;right:0;bottom:16%;overflow:hidden;padding:6% 7%;
  display:grid;align-content:end;gap:5%;transition:bottom .3s cubic-bezier(.2,.8,.2,1)}
.msg{max-width:64%;height:clamp(10px,7vmin,18px);border-radius:10px;background:var(--line)}
.msg.right{justify-self:end;background:color-mix(in srgb,var(--accent) 30%,var(--line))}
.inputrow{position:absolute;left:0;right:0;bottom:3%;height:11%;display:flex;align-items:center;gap:4%;
  padding:0 6%;transition:bottom .3s cubic-bezier(.2,.8,.2,1);z-index:10}
.inputfake{flex:1;height:78%;border-radius:999px;border:1px solid var(--line);display:flex;align-items:center;
  padding:0 6%;font-size:clamp(6px,2.2vmin,8.5px);color:var(--muted)}
.sendbtn{width:16%;aspect-ratio:1;border-radius:50%;background:var(--accent);color:#fff;
  display:grid;place-items:center;font-size:clamp(7px,2.6vmin,10px);flex:none}
.keyboard{position:absolute;left:0;right:0;bottom:0;height:42%;background:var(--line);
  border-radius:8% 8% 0 0;transform:translateY(100%);transition:transform .3s cubic-bezier(.2,.8,.2,1);z-index:5}
.keyboard.show{transform:translateY(0)}

const pfx=document.createElement('div');pfx.className='pfx';document.body.appendChild(pfx);
const screenEl=document.getElementById('screen');
let pfxAuto=true;
function pfxHide(){pfx.style.opacity='0';}
addEventListener('pointerdown',()=>{pfxAuto=false;pfxHide();},{capture:true});
function pfxAt(fx,fy){
  const r=screenEl.getBoundingClientRect();
  const x=r.left+r.width*fx, y=r.top+r.height*fy;
  pfx.style.transform='translate('+x+'px,'+y+'px)';
  return {x,y};
}
function pfxWalk(x0,y0,x1,y1,ms){
  return new Promise(res=>{
    const start=performance.now();
    function step(now){
      if(!pfxAuto) return res();
      const p=Math.min(1,(now-start)/ms), e=1-Math.pow(1-p,3);
      pfxAt(x0+(x1-x0)*e, y0+(y1-y0)*e);
      if(p<1) requestAnimationFrame(step); else res();
    }
    requestAnimationFrame(step);
  });
}
function pfxWait(ms){
  return new Promise(res=>{
    const start=performance.now();
    function step(now){ if(!pfxAuto) return res(); if(now-start<ms) requestAnimationFrame(step); else res(); }
    requestAnimationFrame(step);
  });
}

const inputfake=document.getElementById('inputfake'), inputrow=document.getElementById('inputrow'),
  keyboard=document.getElementById('keyboard'), kbcontent=document.getElementById('kbcontent');
function setKb(show){
  keyboard.classList.toggle('show',show);
  inputrow.style.bottom= show?'45%':'3%';
  kbcontent.style.bottom= show?'58%':'16%';
}
inputfake.addEventListener('pointerdown',()=>{ pfxAuto=false; pfxHide(); setKb(true); });
kbcontent.addEventListener('pointerdown',()=>{ pfxAuto=false; pfxHide(); setKb(false); });
function fracOf(el){ const r=el.getBoundingClientRect(), sr=screenEl.getBoundingClientRect();
  return {x:(r.left+r.width/2-sr.left)/sr.width,y:(r.top+r.height/2-sr.top)/sr.height}; }
async function autoSeq(){
  while(pfxAuto){
    setKb(false);
    let f=fracOf(inputfake);
    await pfxWalk(f.x,f.y,f.x,f.y,400); if(!pfxAuto)break;
    setKb(true);
    await pfxWait(1100); if(!pfxAuto)break;
    await pfxWalk(f.x,f.y,0.5,0.3,300); if(!pfxAuto)break;
    setKb(false);
    await pfxWait(700);
  }
}
autoSeq();