.t31 .calc-page{padding:calc(var(--header-h) + clamp(28px,5vw,56px)) 0 clamp(64px,8vw,112px);background:linear-gradient(180deg,#F2F8FE,#EAF4FD);min-height:70vh}.t31 .calc-head{margin-bottom:clamp(24px,3.5vw,40px)}.t31 .calc-tabs{display:inline-flex;gap:6px;padding:6px;margin-bottom:24px;border-radius:16px;background:var(--white);border:1px solid var(--line);box-shadow:var(--sh-1)}.t31 .calc-tabs button{padding:12px 24px;border-radius:12px;font-size:15.5px;font-weight:700;color:var(--deep);transition:background .2s,color .2s}.t31 .calc-tabs button:hover{background:var(--mist)}.t31 .calc-tabs button[aria-selected=true]{background:var(--grad);color:#fff}.t31 .calc-grid{display:grid;gap:22px;align-items:start}@media (min-width:1000px){.t31 .calc-grid{grid-template-columns:1.05fr .95fr}}.t31 .calc-in{background:var(--white);border:1px solid var(--line);border-radius:28px;box-shadow:var(--sh-1);padding:clamp(22px,3.4vw,40px)}.t31 .calc-fields{display:grid;gap:28px}.t31 .calc-sec-t{margin:0 0 14px;font-family:var(--f-sans);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--royal)}.t31 .calc-cols{display:grid;gap:18px 20px}@media (min-width:640px){.t31 .calc-cols{grid-template-columns:repeat(2,1fr)}}.t31 .calc-f{min-width:0}.t31 .calc-f label,.t31 .calc-lab{display:block;font-size:14.5px;font-weight:700;color:var(--ink)}.t31 .calc-hint{display:block;margin-top:2px;font-size:12.5px;line-height:1.45;color:var(--muted)}.t31 .calc-box{display:flex;align-items:stretch;margin-top:8px;border:1.5px solid var(--line-strong);border-radius:12px;background:var(--white);overflow:hidden;transition:border-color .2s,box-shadow .2s}.t31 .calc-box:focus-within{border-color:var(--royal);box-shadow:0 0 0 3px rgba(46,143,218,.25)}.t31 .calc-box.is-off{opacity:.5}.t31 .calc-box input{flex:1;min-width:0;padding:12px 14px;border:0;outline:0;background:transparent;font-family:var(--f-sans);font-size:16px;font-weight:600;color:var(--ink)}.t31 .calc-pre,.t31 .calc-suf{display:flex;align-items:center;padding:0 14px;font-size:14.5px;font-weight:700;color:var(--muted);background:var(--mist)}.t31 .calc-words-in{display:block;margin-top:6px;font-size:13px;font-weight:600;color:var(--royal)}.t31 .calc-seg{display:inline-flex;gap:6px;margin-top:8px;padding:5px;border-radius:12px;background:var(--mist);border:1.5px solid var(--line-strong)}.t31 .calc-seg button{min-width:64px;padding:9px 18px;border-radius:9px;font-size:14.5px;font-weight:700;color:var(--deep)}.t31 .calc-seg button.on{background:var(--grad);color:#fff}.t31 .calc-reset{margin-top:26px;font-size:14px;font-weight:700;color:var(--royal);text-decoration:underline;text-underline-offset:3px}.t31 .calc-out{background:var(--grad);color:var(--on-royal);border-radius:28px;box-shadow:var(--sh-2);padding:clamp(24px,3.6vw,44px)}@media (min-width:1000px){.t31 .calc-out{position:sticky;top:calc(var(--header-h) + 16px)}}.t31 .calc-k{font-size:15px;font-weight:600;color:var(--ice)}.t31 .calc-big{margin-top:6px;font-family:var(--f-serif);font-size:clamp(40px,5vw,60px);line-height:1.05;overflow-wrap:anywhere}.t31 .calc-words{margin:8px 0 0;font-size:15.5px;line-height:1.5;color:var(--on-royal-2)}.t31 .calc-div{height:1px;margin:24px 0;background:rgba(220,238,251,.22)}.t31 .calc-msg{margin:14px 0 0;padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.1);font-size:16.5px;font-weight:600;line-height:1.5}.t31 .calc-err{margin-top:10px}.t31 .calc-maths{margin-top:22px;border-top:1px solid rgba(220,238,251,.22);padding-top:16px}.t31 .calc-maths summary{cursor:pointer;font-size:15px;font-weight:700;color:var(--white);list-style:none;display:flex;align-items:center;justify-content:space-between}.t31 .calc-maths summary::-webkit-details-marker{display:none}.t31 .calc-maths summary:after{content:"+";font-size:22px;line-height:1;transition:transform .25s}.t31 .calc-maths[open] summary:after{transform:rotate(45deg)}.t31 .calc-maths dl{margin:14px 0 0;display:grid;gap:10px}.t31 .calc-step{display:flex;justify-content:space-between;gap:16px;padding-bottom:10px;border-bottom:1px solid rgba(220,238,251,.14)}.t31 .calc-step dt{font-size:14.5px;font-weight:600;color:var(--white)}.t31 .calc-step dt small{display:block;margin-top:2px;font-size:12px;font-weight:400;line-height:1.4;color:var(--on-royal-2)}.t31 .calc-step dd{margin:0;font-size:14.5px;font-weight:700;text-align:right;white-space:nowrap}.t31 .calc-method{margin:14px 0 0;font-size:12.5px;line-height:1.6;color:var(--on-royal-2)}.t31 .calc-disc{margin:22px 0 0;font-size:12.5px;line-height:1.6;color:var(--ice)}@media (max-width:520px){.t31 .calc-step{flex-direction:column;gap:2px}.t31 .calc-step dd{text-align:left}}