:root{color-scheme:dark;font-family:Arial,Helvetica,sans-serif;color:#f0f1ed;background:#151715;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-height:100svh;background:radial-gradient(ellipse at 50% 45%,#292e24 0,transparent 57%)}header{height:100px;max-width:1320px;margin:auto;padding:0 48px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:12px;align-items:center;font-weight:700;color:inherit;text-decoration:none;font-size:18px}.mark{display:grid;place-items:center;background:#c5fa66;color:#171a13;width:38px;height:38px;border-radius:11px;font-size:22px;letter-spacing:-2px;padding-right:2px}.edition,.eyebrow,.topline,.bottomline,.screen-status{font-family:monospace;letter-spacing:1.4px;font-size:12px}.edition{color:#93988d}main{display:flex;align-items:center;flex-direction:column;padding:28px 20px 56px}.intro{text-align:center;margin-bottom:30px}.eyebrow{color:#c5fa66;margin:0 0 12px}h1{font-size:48px;letter-spacing:-2px;line-height:1.05;margin:0 0 13px;font-weight:600}.intro>p:last-child{color:#a7ada1;font-size:16px;margin:0}.calculator{width:380px;max-width:100%;padding:22px;background:linear-gradient(135deg,#383c35,#282c26);border:1px solid #50564a;border-radius:26px;box-shadow:0 24px 60px #0005,0 3px 0 #0c0e0b,inset 0 1px 0 #ffffff15}.topline{display:flex;justify-content:space-between;align-items:center;color:#c3c9b9;margin-bottom:20px;font-size:12px;letter-spacing:1px}.solar{width:68px;height:18px;border-radius:3px;background:repeating-linear-gradient(90deg,#171b13 0 15px,#353c2a 15px 17px);border:1px solid #171b13}.screen{background:#dce6cb;color:#242e1b;border:3px solid #1e231a;border-radius:12px;padding:17px 17px 12px;box-shadow:inset 0 2px 6px #0002;min-height:141px;overflow:hidden}.expression{min-height:20px;font:14px/20px monospace;white-space:nowrap;overflow-x:auto;text-align:right;scrollbar-width:thin;color:#566347}output{display:block;text-align:right;font-family:monospace;font-size:52px;line-height:1.3;min-height:68px;white-space:nowrap;overflow-x:auto;scrollbar-width:thin;letter-spacing:-2px}.screen-status{display:block;font-size:10px;letter-spacing:1px;opacity:.65;margin-top:6px}.keys{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:20px}button{border:1px solid #555b4e;border-radius:12px;min-height:59px;font:400 24px Arial;background:#454b3f;color:#f5f6ee;cursor:pointer;box-shadow:0 3px 0 #1d211b,inset 0 1px 0 #ffffff09;transition:background .12s,transform .1s,box-shadow .1s;touch-action:manipulation}button:hover{background:#565e4e}button:active,button.pressed{transform:translateY(3px);box-shadow:0 0 0 #1d211b;background:#647052}button:focus-visible,a:focus-visible{outline:3px solid #c5fa66;outline-offset:4px}.utility{background:#353b30;font-size:19px;color:#d7dfcd}.operator{background:#505a43;color:#d6f0b3;font-size:28px}.equals{background:#c5fa66;color:#26321c;border-color:#dafb9b;font-size:30px}.equals:hover,.equals.pressed{background:#dcffa1}.bottomline{display:flex;justify-content:space-between;font-size:9px;letter-spacing:.7px;color:#9da590;margin-top:22px}.keyboard-hint{font-size:12px;color:#9da493;margin:24px 0 0;display:flex;align-items:center;gap:7px}.keycap{border:1px solid #555e49;padding:1px 5px;border-radius:4px}.divider{margin:0 5px;color:#4d5544}footer{max-width:1320px;margin:auto;border-top:1px solid #30352b;padding:24px 48px;display:flex;justify-content:space-between;font-size:12px;color:#92998a}.solved{animation:answer .35s ease-out}@keyframes answer{50%{background:#c5fa66}}@media(max-width:600px){header{height:80px;padding:0 22px}.edition{display:none}main{padding-top:20px;padding-bottom:36px}h1{font-size:40px}.intro{margin-bottom:25px}footer{margin:0 22px;padding:20px 0;gap:16px;font-size:12px}.calculator{padding:18px}.keyboard-hint{font-size:11px;gap:5px}.bottomline{font-size:9px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
