.rotate-btn{position:fixed;z-index:999999;border-radius:50%;background:linear-gradient(135deg,#4b9bff,#2f6bff);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(0,0,0,.2);-webkit-user-select:none;user-select:none;-webkit-user-drag:none;touch-action:none;left:0;top:0;transform:translateZ(0);will-change:transform;isolation:isolate;opacity:.7}.rotate-btn.landscape{background:linear-gradient(135deg,#ff6b6b,#ee5a24)}.rotate-btn .icon{font-size:16px;font-weight:600;letter-spacing:2px;transition:all .3s ease}.rotate-btn.landscape .icon{transform:rotate(-90deg)}