Lobby Elevator — Back to the First Floor

Source Code

Copy the HTML, CSS or JavaScript you need for your project.

<!-- TB-2073 / Back to Top: insert before closing body (inside footer for TB-2083) -->
<button type="button" class="tb-btt bt2073" data-backtop aria-label="ページの先頭、1階へ戻る"><span class="floor-led">1F</span><span class="floor-word">LOBBY</span><span class="floor-line"></span><span class="floor-action">PAGE TOP</span></button>

/* TB-2073 : paste only this CSS into the target page. */
.tb-btt{border:0;cursor:pointer;z-index:30;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:transform .35s,opacity .3s,background .3s,color .3s,box-shadow .3s;pointer-events:none;opacity:0;visibility:hidden}.tb-btt.is-visible{pointer-events:auto;opacity:1;visibility:visible}.tb-btt:focus-visible{outline:3px solid #f9af4b;outline-offset:5px}.only-at-end{opacity:1;visibility:visible;pointer-events:auto}
.bt2073{position:fixed;right:22px;bottom:28px;width:70px;height:142px;border-radius:12px;background:#252b28;color:#e9e5d8;box-shadow:0 15px 26px #1118;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}
.bt2073:before{content:"";position:absolute;inset:7px;border:1px solid #9f9d7f77;border-radius:6px}
.floor-led{font:400 34px/1.1 "Courier New",monospace;color:#d7cf8e;letter-spacing:-.12em;position:relative}
.floor-word{font-size:9px;letter-spacing:.22em;position:relative}
.floor-line{width:26px;height:1px;background:#868b76;margin:5px 0}
.floor-action{font-size:8px;letter-spacing:.12em}
.bt2073:hover{background:#3a483d;transform:translateY(-6px)}
.bt2073:hover .floor-led{animation:floorflip .35s ease}
@keyframes floorflip{50%{transform:translateY(-5px);opacity:.4}}
@media (max-width:600px){.bt2073{right:14px;bottom:16px;width:63px;height:122px}}
@media(prefers-reduced-motion:reduce){.tb-btt,.tb-btt *{animation-duration:.01ms!important;transition-duration:.01ms!important}}

(()=>{'use strict';const control=document.querySelector('[data-backtop]');if(!control)return;const reduced=matchMedia('(prefers-reduced-motion: reduce)');const footer=control.classList.contains('only-at-end');let busy=false;function refresh(){busy=false;const max=Math.max(1,document.documentElement.scrollHeight-window.innerHeight);const p=Math.min(1,scrollY/max);document.documentElement.style.setProperty('--page-progress',p.toFixed(4));if(!footer){const show=scrollY>145;control.classList.toggle('is-visible',show);control.tabIndex=show?0:-1;control.setAttribute('aria-hidden',String(!show));}const number=document.querySelector('[data-progress-number]');if(number)number.textContent=Math.round(p*100)+'%';}function onscroll(){if(!busy){busy=true;requestAnimationFrame(refresh)}}addEventListener('scroll',onscroll,{passive:true});addEventListener('resize',onscroll,{passive:true});control.addEventListener('click',()=>window.scrollTo({top:0,behavior:reduced.matches?'instant':'smooth'}));refresh();})();

How to Use

Insert the HTML button near the end of body, load the CSS, and include JavaScript using defer. Test scrolling, returning to the top, and positioning on mobile.

Use Case

Boutique hotels, travel, hospitality.

Technical Notes

Keep controls usable on touch devices. Test keyboard focus and reduced-motion preferences.

Mobile：Check tap target, visibility and positioning on small screens.

Browser：Designed for current Chrome, Edge, Firefox and Safari.

Reduced Motion：CSS animations respect the reduced-motion preference.