.fs-frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;line-height:1;margin:0 .12em}.fs-frac>.fs-num{padding:0 .3em}.fs-frac>.fs-den{padding:0 .3em}.fs-frac>.fs-bar{height:2px;width:100%;min-width:1.1em;background:currentColor;border-radius:2px;margin:3px 0}.fs-inline{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;font-size:.82em;line-height:1.05;margin:0 .12em}.fs-inline>span:first-child{border-bottom:1px solid currentColor;padding:0 .28em}.fs-inline>span:last-child{padding:0 .28em}.fs-tab{border-radius:.9rem;padding:.5rem .95rem;font-size:.875rem;font-weight:600;color:var(--color-ink-500);background:#fff9;border:1px solid rgba(255,255,255,.7);transition:all .2s}.fs-tab:hover{color:var(--color-brand-700)}.fs-tab.is-active{color:#fff;background:linear-gradient(135deg,var(--color-brand-500),var(--color-accent-500));box-shadow:0 8px 20px -8px #7c3aed99}.fs-sub{border-radius:.6rem;padding:.35rem .8rem;font-weight:600;color:var(--color-ink-500);transition:all .2s}.fs-sub.is-active{background:#fff;color:var(--color-brand-700);box-shadow:var(--shadow-soft)}.fs-op{height:2.1rem;width:2.1rem;border-radius:.7rem;font-size:1.05rem;font-weight:700;color:var(--color-ink-500);background:#ffffffb3;border:1px solid var(--color-ink-200);transition:all .15s}.fs-op:hover{color:var(--color-brand-700);border-color:var(--color-brand-300)}.fs-op.is-active{color:#fff;background:linear-gradient(135deg,var(--color-brand-500),var(--color-accent-500));border-color:transparent}.fs-field{display:flex;align-items:center;gap:.4rem}.fs-frac-input{display:inline-flex;flex-direction:column;align-items:center;padding:.3rem .5rem;border-radius:.9rem;background:#fff;border:1px solid var(--color-ink-200);transition:border-color .2s,box-shadow .2s}.fs-frac-input:focus-within{border-color:var(--color-brand-400);box-shadow:0 0 0 3px #7c3aed1f}.fs-frac-input input{width:3.2rem;border:none;background:transparent;text-align:center;font-weight:600;color:var(--color-ink-900);outline:none;font-size:1rem}.fs-frac-input input.num{padding-bottom:2px}.fs-frac-input input.den{padding-top:2px}.fs-frac-input .fs-rule{width:100%;height:2px;background:var(--color-ink-300);border-radius:2px}.fs-frac-input--lg input{width:3.6rem;font-size:1.15rem}.fs-input,.operand .whole{border-radius:.8rem;border:1px solid var(--color-ink-200);background:#fff;padding:.55rem .8rem;outline:none;color:var(--color-ink-900);font-weight:600;transition:border-color .2s,box-shadow .2s}.fs-input:focus,.operand .whole:focus{border-color:var(--color-brand-400);box-shadow:0 0 0 3px #7c3aed1f}.fs-chip{border-radius:9999px;border:1px solid var(--color-ink-200);background:#fff;padding:.3rem .75rem;font-size:.8rem;color:var(--color-ink-600);transition:all .2s}.fs-chip:hover{border-color:var(--color-brand-300);color:var(--color-brand-700)}.fs-btn-primary{border-radius:.9rem;padding:.6rem 1.2rem;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--color-brand-500),var(--color-accent-500));box-shadow:0 8px 20px -8px #7c3aed99;transition:all .2s}.fs-btn-primary:hover{filter:brightness(1.05)}.fs-btn-primary:active{transform:scale(.97)}.fs-btn-ghost{border-radius:.9rem;padding:.55rem 1rem;font-weight:600;color:var(--color-ink-600);background:#ffffffb3;border:1px solid var(--color-ink-200);transition:all .2s}.fs-btn-ghost:hover{color:var(--color-brand-700);border-color:var(--color-brand-300)}.fs-btn-ghost:disabled{opacity:.45;cursor:not-allowed}.fs-tape{display:flex;width:100%;height:1.4rem;border-radius:.5rem;overflow:hidden;border:1px solid var(--color-ink-200)}.fs-tape>i{flex:1;border-right:1px solid rgba(255,255,255,.7)}.fs-tape>i:last-child{border-right:none}.fs-tape>i.on{background:linear-gradient(135deg,var(--color-brand-400),var(--color-accent-400))}.fs-tape>i.off{background:var(--color-ink-100)}.fs-step{border-left:2px solid var(--color-brand-200);padding:.5rem 0 .5rem .9rem;margin-top:.6rem}.fs-step:first-child{margin-top:0}.fs-step b{color:var(--color-brand-700)}.fs-copy-btn{transition:color .2s}.fs-copy-btn:hover{color:var(--color-brand-700)}
