.input-row{margin-bottom:10px;position:relative}.input-row input[type=number]{box-sizing:border-box;text-align:center;border:1px solid #ccc;border-radius:4px;width:100%;padding:10px 2.5em;font-size:larger}.random-btn{cursor:pointer;z-index:1;background:0 0;border:none;padding:0;font-size:1.2em;line-height:1;position:absolute;top:50%;right:.5em;transform:translateY(-50%)}.equation-row{cursor:pointer;border-radius:4px;grid-template-columns:30% 30% 40%;align-items:baseline;gap:4px;width:100%;min-width:max-content;padding:12px;transition:box-shadow .1s;display:grid}.equation-row:hover{box-shadow:inset 0 0 0 1px #ffa50099}.equation-row:active{box-shadow:inset 0 0 0 2px #ffa500e6}.equation-row:focus-visible{outline:none;box-shadow:inset 0 0 0 2px #007bffb3}.copy-message-overlay{color:#1a1a1a;pointer-events:none;z-index:10;background:#fff;border-radius:4px;padding:4px 8px;animation:5s ease-in forwards fadeOut;position:absolute;top:50%;left:50%;transform:translate(-150%,100%);box-shadow:0 0 4px #0003}@media only screen and (width<=600px){.copy-message-overlay{transform:translate(-100%,100%)}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}.equation-lhs{text-align:right;justify-self:end}.equation-rhs{text-align:left;justify-self:start}.equation-x-value{text-align:left}.offscreen{width:600px;position:absolute;top:0;left:-9999px}.equation-row-container{width:100%;position:relative}.equation-row-wrapper{width:100%;overflow:auto hidden}.container:has(.solve-toggle.active) .equation-row{grid-template-columns:0fr 1fr 0fr;display:grid}@media only screen and (width>=600px){.container:has(.solve-toggle.active) .equation-row{padding-inline:15%}}.equations-container{flex-direction:column;width:100%;min-height:100px;margin-top:1em;margin-bottom:1em;transition:filter .3s;display:flex}.equation-separator{background-color:#ccc;width:100%;height:.5px}.blurred{filter:blur(2px);opacity:.7;pointer-events:none}.loading-overlay{background:#ffffffb3;flex-direction:column;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.loading-indicator{text-align:center}.loading-hint{color:#6c757d;margin:0;font-size:13px}.message-block{text-align:center;color:#495057;background-color:#f8f9fa;border:1px solid #dee2e6;border-radius:4px;margin-top:15px;padding:15px}.message-block p{margin:5px 0}.message-details{white-space:pre-wrap;word-break:break-word;text-align:left;color:#6c757d;margin:5px 0;font-size:12px}.spinner{border:4px solid #007bff33;border-top-color:#007bff;border-radius:50%;width:40px;height:40px;margin:10px auto;animation:1s ease-in-out infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.ries-panel{background-color:#fff;border:1px solid #ddd;border-radius:4px;width:100%;margin-top:10px;padding:15px}.options-section{margin-bottom:20px}.options-section h3{color:#333;border-bottom:1px solid #eee;margin-top:0;margin-bottom:10px;padding-bottom:5px;font-size:16px}.options-row{gap:20px;display:flex}.options-row .options-section{flex:1}.options-wrapper{flex-wrap:wrap;gap:12px 24px;margin-bottom:15px;display:flex}.select-option{align-items:center;display:flex}.select-option label{align-items:center;gap:8px;font-size:14px;display:flex}.solution-type-select{background-color:#f8f8f8;border:1px solid #ddd;border-radius:4px;width:120px;margin-left:8px;padding:6px 10px;font-size:14px}.search-depth-select{width:auto}.debug-output-section{margin-bottom:20px}.symbol-selection{flex-direction:column;gap:15px;display:flex}.legend-container{background-color:#f8f8f8;border:1px solid #e8e8e8;border-radius:4px;margin-bottom:10px;padding:10px}.legend-title{color:#555;margin-bottom:8px;font-size:14px}.legend{flex-wrap:wrap;gap:12px;display:flex}.legend-item{color:#333;align-items:center;gap:5px;font-size:13px;display:flex}.legend-dot{border:1px solid #ddd;border-radius:50%;width:14px;height:14px}.legend-dot.enabled{background-color:#f8f8f8}.legend-dot.never{background-color:#fcc}.legend-dot.once{background-color:#ffc}.legend-dot.only{background-color:#cfc}.keypad-container{flex-direction:column;gap:8px;margin-bottom:15px;display:flex}.keypad-row{gap:8px;display:flex}.key{cursor:pointer;color:#333;background-color:#f8f8f8;border:1px solid #ddd;border-radius:4px;flex:1;justify-content:center;align-items:center;min-width:0;height:48px;font-size:16px;transition:all .2s;display:flex;position:relative}.key:hover:not(.empty-key){background-color:#eaeaea}.key:active:not(.empty-key){transform:translateY(1px)}.empty-key{cursor:default;background-color:#0000;border-color:#0000}.number-key{background-color:#fff}.operator-key{background-color:#f0f0f0}.function-key{background-color:#e8e8e8}.key.never{background-color:#fcc;border-color:#faa}.key.once{background-color:#ffc;border-color:#ffa}.key.only{background-color:#cfc;border-color:#afa}.key-text{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.state-indicator{color:#fff;text-align:center;background-color:#666;border-radius:50%;width:14px;height:14px;font-size:9px;font-weight:700;line-height:14px;position:absolute;top:3px;right:3px}.command-text,.debug-output{white-space:pre-wrap;word-break:break-word;cursor:default;background-color:#f0f0f0;border:1px solid #ddd;border-radius:4px;margin-bottom:15px;padding:15px;font-family:monospace;font-size:12px}.debug-output{max-height:300px;overflow-y:auto}.checkbox-option{margin-bottom:0}.checkbox-option label{cursor:pointer;align-items:center;gap:6px;font-size:14px;display:flex}.debug-section{border-top:1px solid #eee;margin-top:20px;padding-top:20px}.debug-controls{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:10px;display:flex}.debug-toggle{cursor:pointer;background-color:#f8f8f8;border:1px solid #ddd;border-radius:4px;align-items:center;gap:.5em;padding:6px 12px;font-weight:500;transition:background-color .2s;display:inline-flex}.debug-toggle input{margin:0}.debug-toggle:hover{background-color:#f0f0f0}.debug-toggle.active{color:#fff;background-color:#333;border-color:#333}.debug-toggle.active:hover{background-color:#444}.debug-panel-content{background-color:#f9f9f9;border:1px solid #ddd;border-radius:4px;margin-bottom:20px;padding:15px}@media (width<=768px){.options-row{flex-direction:column;gap:10px}.solution-type-wrapper{margin-top:10px;margin-left:0}}body{background-color:#f9f9f9;flex-direction:column;align-items:center;margin:0;padding:20px;font-family:Helvetica Neue,Helvetica,Arial,sans-serif;display:flex}div{box-sizing:border-box}#root{width:100%}h1{margin-top:0}.container{background-color:#fff;border-radius:8px;flex:1;width:100%;max-width:700px;margin:0 auto;padding:20px;box-shadow:0 2px 8px #0000001a}.hidden{display:none}.button{color:#fff;cursor:pointer;white-space:nowrap;background-color:#007bff;border:none;border-radius:4px;padding:10px 20px;font-size:16px;transition:background-color .2s}.button:hover{background-color:#0056b3}footer{text-align:center;color:#666;margin-top:30px;font-size:14px}footer a{color:#007bff;text-decoration:none}footer a:hover{text-decoration:underline}@media only screen and (width<=600px){body{padding:0}h1{font-size:6.6vw}}