:root{font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:#142430;background:#eff5f4;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:#125e6d}header,main,footer{max-width:1180px;margin:auto}header{padding:18px 24px;display:flex;justify-content:space-between;align-items:center}header>a{font-weight:850;text-decoration:none}nav{display:flex;gap:18px;font-size:14px}.intro{padding:22px 22px 8px;max-width:680px}.intro h1{font-size:clamp(28px,5vw,44px);margin:2px 0 8px;letter-spacing:-1.7px}.intro p{line-height:1.55}.eyebrow{color:#417870;font-size:11px;font-weight:800;letter-spacing:1.5px}.layout{padding:20px;display:grid;grid-template-columns:minmax(330px,500px) minmax(250px,1fr);gap:42px;align-items:start}.handheld{padding:24px 20px 22px;background:linear-gradient(145deg,#445b64,#1d3039 72%);border-radius:32px;border:2px solid #15242c;box-shadow:0 22px 45px #17323834,inset 0 1px #fff4;color:#eaf4f5}.badge{display:flex;justify-content:space-between;align-items:end;padding:0 7px 15px}.badge span{font-weight:900;letter-spacing:4px;color:#85e0d1}.badge small{font-size:10px;color:#c5d5d7}.display{background:#17262b;border:7px solid #111d21;border-radius:15px;padding:8px;box-shadow:inset 0 1px 5px #0009}.lcd-top{display:flex;justify-content:space-between;padding:2px 5px 5px;font:11px ui-monospace,monospace;color:#e6f6d0;letter-spacing:.7px}.screen{background:linear-gradient(135deg,#e9f6ce,#addbd1);color:#112e36;min-height:252px;border-radius:7px;padding:10px;outline:none;overflow:auto}.softkeys{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;padding-top:6px}.softkeys button{background:#39525a;color:white;border:1px solid #668089;border-radius:4px;font-size:10px;padding:5px 2px;min-height:27px}.top-row{display:grid;grid-template-columns:repeat(7,1fr);gap:7px;margin:14px 0 10px}.top-row button,.nav-row button,.keys button{border:1px solid #607780;border-bottom:3px solid #10222a;border-radius:7px;background:#354c56;color:#fff;min-height:35px;font-weight:700;cursor:pointer}.top-row button{font-size:10px;text-transform:uppercase}.nav-row{display:grid;grid-template-columns:repeat(4,1fr) 1.6fr;gap:8px;margin-bottom:12px}.nav-row .second{background:#e6bc5f;color:#27220f}.nav-row .alpha{background:#75c7d3;color:#13313a}.dpad{display:grid;grid-template-columns:repeat(3,1fr);gap:2px}.dpad button{min-height:26px;padding:2px;border-radius:4px}.dpad button:first-child{grid-column:2}.dpad button:nth-child(2){grid-column:1}.dpad button:last-child{grid-column:2}.keys{display:grid;grid-template-columns:repeat(5,1fr);gap:9px}.keycap{position:relative;min-width:0}.keycap small{display:block;height:13px;color:#90e9d8;text-align:center;font-size:10px;white-space:nowrap;overflow:hidden}.keys button{width:100%;font-size:15px}.keys .number{background:#e4edef;color:#18313d;border-color:#c3d3d7;border-bottom-color:#13252e;font-size:20px}.keys .op{background:#a9d0d2;color:#153941}.keys .enter{background:#7bdbbd;color:#173b31}.keys button:hover,.top-row button:hover,.nav-row button:hover,.softkeys button:hover{filter:brightness(1.13)}button:active{transform:translateY(1px)}button:focus-visible,.screen:focus-visible,a:focus-visible{outline:3px solid #edbc52;outline-offset:3px}.side{display:grid;gap:16px;padding-top:8px}.card{background:white;border:1px solid #ccdeda;border-radius:14px;padding:20px}.card h2{margin:0 0 10px;font-size:20px}.card p{font-size:14px;line-height:1.6}.small{color:#5d7372;font-size:12px!important}.card button{font:inherit;border:1px solid #b8ccc8;background:#fff;border-radius:7px;padding:9px;color:#204c46}.card .danger{color:#8a2d2d}.screen h2{font-size:17px;margin:0 0 8px}.screen p{font-size:12px;line-height:1.45}.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.app-grid button{border:1px solid #458281;background:#f5fff3;border-radius:6px;color:#123f48;min-height:48px;padding:5px;font-size:11px;font-weight:700}.screen label{font-size:11px;font-weight:700;display:block;margin:7px 0 3px}.screen input,.screen select,.screen textarea{width:100%;border:1px solid #5b9793;border-radius:4px;background:#fbfff9;color:#133d44;padding:5px;font:12px ui-monospace,monospace}.screen textarea{min-height:60px;resize:vertical}.screen .button-row{display:flex;flex-wrap:wrap;gap:6px;margin:9px 0}.screen .button-row button,.screen .tool-form button{border:1px solid #327574;background:#e8fff2;color:#123d43;border-radius:5px;padding:5px 8px;font-size:11px;font-weight:700}.screen pre{margin:8px 0;white-space:pre-wrap;font:12px/1.45 ui-monospace,monospace}.graph-canvas{display:block;width:100%;height:auto;background:#f9fff7;border:1px solid #639c91;margin-top:8px}.function-row{display:grid;grid-template-columns:20px 1fr 29px;gap:5px;align-items:center;margin:4px 0}.swatch{width:14px;height:14px;border-radius:50%}.expr{min-width:0}.screen table{width:100%;border-collapse:collapse;font:11px ui-monospace,monospace}.screen td,.screen th{border-bottom:1px solid #82aaa1;padding:3px;text-align:right}.screen .error{color:#a11d1d;font-weight:700}.screen .success{color:#075b4a;font-weight:700}.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:white;padding:8px;z-index:9}footer{text-align:center;padding:30px;color:#607877;font-size:12px}@media(max-width:780px){header{padding:15px}main{padding:0}.layout{grid-template-columns:minmax(0,1fr);padding:12px;gap:20px;max-width:510px;margin:auto}.handheld{padding:19px 14px 16px;border-radius:24px}.keys{gap:7px}.top-row{gap:5px}.top-row button{font-size:8px}.screen{min-height:246px}.intro{padding:15px}.badge small{display:none}}@media(max-width:390px){.layout{padding:7px}.handheld{padding:14px 10px}.keys{gap:5px}.keys button{min-height:34px;font-size:13px}.keys .number{font-size:18px}.nav-row{gap:5px}.app-grid{grid-template-columns:repeat(2,1fr)}}
/* Advanced Calculator application screens */
.c0{background:#ce3f65}.c1{background:#126a97}.c2{background:#a3630a}.c3{background:#147a62}.c4{background:#6d4ea8}.c5{background:#d0462c}.segmented{display:flex;gap:3px;overflow:auto;padding-bottom:3px}.segmented button{white-space:nowrap;border:1px solid #4e8881;background:#effff5;color:#16434a;border-radius:4px;padding:4px 6px;font-size:10px}.segmented button[aria-pressed=true]{background:#28736d;color:#fff}.transform{display:grid;grid-template-columns:1fr 1fr;gap:3px;margin-top:7px}.transform label{display:grid!important;grid-template-columns:16px 1fr;align-items:center;gap:3px}.transform input{padding:0!important}.list-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px}.list-grid textarea{min-height:44px!important}.tool-list{display:grid;grid-template-columns:1fr 1fr;gap:4px;margin:6px 0}.tool-list button{border:1px solid #669b91;background:#f5fff5;border-radius:5px;padding:6px;text-align:left;font-size:10px;color:#16434a}.tool-list small{display:block;font-weight:400;font-size:9px;opacity:.8}.screen details{margin:5px 0}.screen summary{font-size:12px;font-weight:800;cursor:pointer}.embed header,.embed .intro,.embed .side,.embed footer{display:none}.embed .layout{grid-template-columns:minmax(0,500px);padding:0}.embed .handheld{border-radius:0;box-shadow:none}@media(max-width:390px){.tool-list{grid-template-columns:1fr}.transform{grid-template-columns:1fr}.screen{padding:8px}}
/* Keep the calculator itself in the first desktop viewport. */
header{padding-top:10px!important;padding-bottom:10px!important}.intro{padding-top:8px!important;padding-bottom:0!important}.intro h1{font-size:clamp(25px,3vw,34px)!important;margin:0 0 4px!important}.intro p{margin:4px 0!important}.layout{padding-top:10px!important}
@media(max-width:390px){.top-row{grid-template-columns:repeat(7,minmax(0,1fr))!important}.top-row button{min-width:0;padding:2px 0;font-size:7px!important;overflow:hidden}.badge{padding-bottom:8px}.display{padding:6px}}

.top-row{grid-template-columns:repeat(7,minmax(0,1fr))}.top-row button{min-width:0;padding:4px 0;font-size:9px;overflow:hidden}.screen{max-height:440px;overflow:auto}.table-scroll{overflow:auto}.screen textarea#program-source{min-height:140px}.screen [role=status]{overflow-wrap:anywhere}.screen .button-row label{flex:1;min-width:80px}.screen button:disabled{opacity:.5}.embed .layout{margin:auto}.keycap small{min-height:13px}

.python-runtime{position:fixed;width:1px;height:1px;opacity:0;pointer-events:none;left:0;bottom:0;border:0}
.top-row button{font-size:.6rem;padding:.4rem .12rem;overflow:hidden}

.top-row button{font-size:10px!important;padding:7px 1px!important}