.floating-back-button{z-index:35;left:max(6vw, calc(env(safe-area-inset-left,0px) + 16px));bottom:calc(20px + env(safe-area-inset-bottom,0px));background:var(--ink);min-height:48px;color:var(--cream);border:1px solid #faf6ef33;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:0 20px;font-size:14px;font-weight:600;line-height:1.4;transition:transform .22s,opacity .18s,background .18s;display:inline-flex;position:fixed;box-shadow:0 6px 24px #35333029}.floating-back-button.is-hidden{transform:translateY(calc(100% + 32px + env(safe-area-inset-bottom,0px)));opacity:0;pointer-events:none}.floating-back-button:focus-visible{opacity:1;pointer-events:auto;transform:none}@media (hover:hover){.floating-back-button:hover{background:var(--blue)}}@media (prefers-reduced-motion:reduce){.floating-back-button{transition:none}}