body{font-family:Arial,sans-serif;margin:0;padding:20px;background-color:#f5f5f5;color:#333}#gallery-wall-calculator{max-width:700px;margin:0 auto;padding:20px;border:1px solid #ddd;border-radius:8px;background-color:#fff;box-shadow:0 4px 8px rgba(0,0,0,.1)}form label{display:block;font-weight:700;margin-bottom:5px}form input{width:calc(100% - 20px);padding:8px 10px;margin-bottom:15px;border:1px solid #ccc;border-radius:4px;font-size:14px;box-sizing:border-box}button{padding:10px 15px;font-size:14px;border:none;border-radius:4px;cursor:pointer}button:hover{background-color:#0056b3}#generate-layout{background-color:#007bff;color:#fff}#reset-layout{background-color:#dc3545;color:#fff}#reset-layout:hover{background-color:#a71d2a}.action-buttons{display:flex;gap:10px;margin-top:20px}.tooltip{display:inline-block;position:relative;cursor:pointer;color:#007bff;font-weight:700;margin-left:5px}.tooltip::after{content:attr(data-tooltip);position:absolute;left:50%;bottom:125%;transform:translateX(-50%);background-color:#333;color:#fff;padding:5px 10px;border-radius:4px;white-space:nowrap;font-size:12px;opacity:0;visibility:hidden;transition:opacity 0.2s ease,visibility 0.2s ease}.tooltip:hover::after{opacity:1;visibility:visible}#wall{position:relative;width:100%;height:400px;background-color:#eaeaea;border:1px solid #ccc;margin:20px 0;display:flex;flex-direction:column;justify-content:flex-start;align-items:center;overflow:hidden}.level{display:flex;justify-content:center;align-items:center;width:100%;margin-bottom:10px}.piece{background-color:#007bff;color:#fff;text-align:center;display:flex;justify-content:center;align-items:center;margin:5px;box-shadow:0 2px 5px rgba(0,0,0,.2);font-size:12px;border-radius:4px}