Elevator Lobby — Back to Lobby

Source Code

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

<button class="btt-control btt-hotel" data-btt type="button" aria-label="ページの先頭へ戻る・Back to Lobby"><span class="h-panel-top">MAISON AOBA <i class="h-status" aria-hidden="true"></i></span><span class="h-floor-current" aria-hidden="true">05</span><span class="h-floor-line"><i aria-hidden="true"></i><span>FLOOR</span></span><span class="h-lobby-destination"><b>1F</b><span>LOBBY</span></span><span class="h-back-label">BACK TO<br>LOBBY <small>PAGE TOP</small></span></button>

/* Isolated button CSS, extracted from approved original demo */
.btt-control,.btt-control *, .btt-control *::before,.btt-control *::after{box-sizing:border-box}.btt-control{font-family:Arial,"Noto Sans CJK JP","Yu Gothic",sans-serif}
.btt-control:focus-visible{outline:3px solid #f0ad4d;outline-offset:5px}
.btt-hotel{position:fixed;z-index:30;right:clamp(15px,2.3vw,36px);top:50%;width:88px;min-height:276px;transform:translate(18px,-50%);opacity:0;visibility:hidden;pointer-events:none;cursor:pointer;border:1px solid #746b55;border-radius:14px;background:linear-gradient(125deg,#252b27,#111917);color:#e4d8bb;box-shadow:0 16px 45px rgba(0,0,0,.35),inset 0 0 0 3px #303c36;padding:14px 9px;display:flex;flex-direction:column;align-items:center;gap:7px;transition:opacity .3s,transform .35s,visibility .3s,box-shadow .35s}
.btt-hotel.is-visible{opacity:1;visibility:visible;pointer-events:auto;transform:translate(0,-50%)}
.h-panel-top{font:600 6.8px Arial;letter-spacing:.11em;white-space:nowrap;border-bottom:1px solid #5e6258;padding-bottom:11px;width:100%;text-align:center}
.h-status{display:inline-block;width:4px;height:4px;border-radius:100%;background:#dcc081;box-shadow:0 0 7px #ecd497;animation:h-glow 3s ease-in-out infinite;margin-left:3px}
.h-floor-current{font:400 48px/.94 Georgia,serif;color:#eee1bd;margin-top:8px;font-variant-numeric:tabular-nums;letter-spacing:-.09em}
.h-floor-line{display:flex;align-items:center;gap:6px;font:700 7px Arial;letter-spacing:.13em;color:#b2a58c}
.h-floor-line i{width:18px;height:1px;background:#b2a58c}
.h-lobby-destination{background:#dbc096;color:#223027;border-radius:4px;width:100%;padding:8px 2px;display:grid;place-items:center;box-shadow:0 0 15px rgba(221,184,118,.24);transition:background .3s}
.h-lobby-destination b{font:700 22px/1 Georgia,serif}
.h-lobby-destination span{font:700 8px/1.3 Arial;letter-spacing:.14em}
.h-back-label{display:block;text-align:center;font:700 9px/1.15 Arial,sans-serif;letter-spacing:.08em;margin-top:auto;color:#efe6cd}
.h-back-label small{display:block;margin-top:5px;font-size:7px;letter-spacing:.08em;color:#b2ab99}
.btt-hotel:hover{box-shadow:0 18px 55px rgba(0,0,0,.5),0 0 0 2px rgba(233,201,148,.48)}
.btt-hotel:hover .h-lobby-destination{background:#f4d9a7}
.btt-hotel.is-going .h-floor-current{color:#f6d5a0}
@keyframes h-glow{0%,100%{opacity:.4}50%{opacity:1}}
@media (max-width:900px){.btt-hotel{top:auto;bottom:20px;width:76px;min-height:190px;right:15px;transform:translateY(16px);padding:10px 7px}
.btt-hotel.is-visible{transform:none}
.h-floor-current{font-size:31px;margin-top:0}
.h-panel-top{font-size:5.7px;padding-bottom:5px}
.h-back-label{font-size:8px}
.h-lobby-destination{padding:5px}
.h-lobby-destination b{font-size:18px}
.h-back-label small{font-size:6px}}
.btt-hotel{box-sizing:border-box;max-height:calc(100dvh - 28px);justify-content:space-between;gap:8px}
.h-panel-top{white-space:normal;overflow-wrap:normal;line-height:1.25;min-height:16px;display:flex;justify-content:center;align-items:center;gap:4px}
.h-panel-top .h-status{flex:none;margin-left:0}
.h-back-label{line-height:1.3;white-space:normal;overflow-wrap:normal}
@media  (max-width:900px){.btt-hotel{width:90px;min-height:212px;padding:10px 8px;right:12px;bottom:16px;gap:6px}
.h-panel-top{font-size:7.3px;letter-spacing:.035em;padding-bottom:7px}
.h-floor-current{font-size:35px}
.h-lobby-destination b{font-size:21px}
.h-lobby-destination span{font-size:9px}
.h-back-label{font-size:9px;letter-spacing:.045em}
.h-back-label small{font-size:8px;letter-spacing:.04em}}
@media (max-height:450px){.btt-hotel{width:80px;min-height:178px;padding:6px;gap:3px}
.h-floor-current{font-size:27px}
.h-panel-top{font-size:6px;padding-bottom:3px}
.h-back-label{font-size:8px}}

(()=>{'use strict';const el=document.querySelector('[data-btt]');if(!el)return;const cur=el.querySelector('.h-floor-current');const reduce=matchMedia('(prefers-reduced-motion: reduce)');let raf=0;function update(){raf=0;const y=scrollY;let p=y/Math.max(1,document.documentElement.scrollHeight-innerHeight);p=Math.min(1,Math.max(0,p));el.classList.toggle('is-visible',y>170);el.tabIndex=y>170?0:-1;el.setAttribute('aria-hidden',String(!(y>170)));const floor=Math.min(9,Math.max(1,Math.ceil(1+p*8)));cur.textContent=String(floor).padStart(2,'0');}addEventListener('scroll',()=>{if(!raf)raf=requestAnimationFrame(update)},{passive:true});addEventListener('resize',update,{passive:true});el.addEventListener('click',()=>{el.classList.add('is-going');window.scrollTo({top:0,behavior:reduce.matches?'auto':'smooth'});setTimeout(()=>el.classList.remove('is-going'),1100)});update()})();

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

Hotels, hospitality and architectural websites.

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.