.scroll-top-btn{z-index:200;background:var(--text-primary);color:#fff;cursor:pointer;width:48px;height:48px;font-family:var(--font-body);font-weight:var(--fw-body-bold);letter-spacing:.1em;transition:background var(--transition-fast),transform var(--transition-fast);border:none;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;gap:2px;font-size:9px;animation:.25s fadeInBtn;display:flex;position:fixed;bottom:32px;right:28px;box-shadow:0 4px 16px #0003}.scroll-top-btn:hover{background:var(--primary-red);transform:translateY(-2px)}@keyframes fadeInBtn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}