.calculator-simulator-section{color:#fff;background:var(--ink);padding:92px 6vw}.simulator-shell{grid-template-columns:minmax(300px,.72fr) minmax(520px,1fr);align-items:start;gap:6vw;display:grid}.simulator-copy>span{color:var(--mint);letter-spacing:.14em;font:900 10px/1.2 ui-monospace,monospace}.simulator-copy h2{letter-spacing:-.045em;max-width:650px;margin:16px 0 20px;font:900 clamp(40px,5vw,68px)/1.05 Noto Serif SC,serif}.simulator-copy>p{color:#ffffff94;max-width:650px;font-size:14px;line-height:1.75}.calculator-challenges{border-top:1px solid #ffffff29;margin-top:35px}.calculator-challenges button{color:#fff;cursor:pointer;text-align:left;background:0 0;border:0;border-bottom:1px solid #ffffff29;grid-template-columns:38px 100px 1fr;align-items:center;gap:10px;width:100%;min-height:73px;padding:13px 11px;display:grid}.calculator-challenges button:hover,.calculator-challenges button.active{background:#ffffff12}.calculator-challenges button.active{box-shadow:inset 4px 0 var(--orange)}.calculator-challenges b{color:var(--orange);font:900 11px ui-monospace,monospace}.calculator-challenges span{font-size:12px;font-weight:900}.calculator-challenges small{color:#ffffffa3;font-size:11px;line-height:1.45}.challenge-check{min-height:45px;color:var(--ink);background:var(--orange);cursor:pointer;border:0;margin-top:20px;padding:0 17px;font-size:12px;font-weight:900}.scientific-calculator{max-width:720px;color:var(--ink);background:#d9dde2;border-radius:22px 22px 30px 30px;padding:24px;box-shadow:0 26px 70px #00000057,inset 0 1px #ffffffbf}.calculator-topline{justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px;display:flex}.calculator-topline b{color:#25334a;letter-spacing:.05em;font:900 13px ui-monospace,monospace}.calculator-topline span{color:#697384;letter-spacing:.11em;font:800 7px ui-monospace,monospace}.calculator-display{color:#17291e;background:#b9d5b7;border:8px solid #3b4553;border-radius:8px;flex-direction:column;min-height:156px;padding:16px 18px;display:flex;overflow:hidden;box-shadow:inset 0 2px 8px #00000047}.calculator-display>div{justify-content:space-between;font:900 9px ui-monospace,monospace;display:flex}.calculator-display p{overflow-wrap:anywhere;min-height:23px;margin:15px 0 5px;font:700 14px/1.45 ui-monospace,monospace}.calculator-display strong{overflow-wrap:anywhere;text-align:right;align-self:flex-end;font:900 clamp(25px,3vw,38px)/1.2 ui-monospace,monospace}.calculator-display small{opacity:.72;margin-top:auto;font-size:11px;line-height:1.4}.calculator-keypad{grid-template-columns:repeat(5,1fr);gap:8px;margin-top:18px;display:grid}.calc-key{color:#fff;cursor:pointer;background:#354054;border:0;border-radius:8px 8px 12px 12px;min-height:48px;padding:5px;font:900 12px/1 ui-monospace,monospace;transition:transform 80ms,box-shadow 80ms;box-shadow:0 3px #151c29}.calc-key:hover{filter:brightness(1.12)}.calc-key:active{transform:translateY(2px);box-shadow:0 1px #151c29}.key-number{color:#101a28;background:#f7f8f9;font-size:15px;box-shadow:0 3px #9aa2ad}.key-operator{background:#657086}.key-function{background:#273246;font-size:10px}.key-memory,.key-mode{color:#17243a;background:var(--mint);font-size:9px;box-shadow:0 3px #4b9470}.key-control{background:#c05c44;font-size:9px;box-shadow:0 3px #783425}.key-equals{color:var(--ink);background:var(--orange);font-size:17px;box-shadow:0 3px #9a3519}.calculator-history{color:#fff;background:#263247;border-radius:10px;margin-top:18px;padding:15px}.calculator-history>div{justify-content:space-between;align-items:center;display:flex}.calculator-history span{color:var(--mint);letter-spacing:.1em;font:900 8px ui-monospace,monospace}.calculator-history button{color:#ffffffb3;cursor:pointer;background:0 0;border:0;padding:4px;font-size:10px}.calculator-history p{color:#ffffffbd;overflow-wrap:anywhere;border-top:1px solid #ffffff1f;margin:7px 0 0;padding-top:7px;font:11px/1.55 ui-monospace,monospace}@media (max-width:1050px){.simulator-shell{grid-template-columns:1fr}.scientific-calculator{max-width:760px}}@media (max-width:650px){.calculator-simulator-section{padding:68px 20px}.scientific-calculator{border-radius:14px 14px 22px 22px;padding:16px 12px}.calculator-display{min-height:135px}.calculator-keypad{gap:6px}.calc-key{min-height:44px;font-size:10px}.key-number{font-size:14px}.calculator-challenges button{grid-template-columns:30px 85px 1fr}}