:root{--w9:#000;--NT:#fff;--A1:#f5f5f5;--ET:#e0e0e0;--pu:#d8d8d8;--ib:#888888;--HR:inherit;--XO:#f5f5f5;--w1:#ced2e0;--GD:#eeeeee;--uC:#e8e8e8;--hc:inherit;--TN:inherit;--BN:grey;--du:inherit;--XS:#387d9b;--iH:inherit;--U8:#8b8eae;--TV:#fff;--Vn:#7d7d7d;--po:#a9b2e0;--NP:#fff;--Go:#9bb1ea;--dd:#f5f5f5;--Fs:#040404;--wq:gray;--y9:#fff;--wn:#353535;--R9:#000;--Ij:#c8cadd;--cb:none;--VA:#212121;--Dq:#c8cadd;--h6:#dedfe9;--r5:#3a84f3;--I3:#6f6f6f;--zI:inherit;--go:#a7a7a766;--CV:#646161;--kb:#698ad3;--MY:#698ad3;--q0:#b7b7b7;--wU:#dedede;--DW:#3a3a3a;--py:#ccc;--Um:#d0d0d0;--St:shaker,twcham;--Q3:#6f6f6f47;--_M:none;--ki:#d4d4d4;--ZQ:inherit;--rn:invert(1);--Gx:inherit;--SW:#dedede;--bS:#212121;--t3:#676767;--E5:#608392;--tl:#bdcdd4;--l6:none;--eQ:#fff;--et:none;--w4:none;--ri:#ededf0;--VE:none;--mO:silver;--fE:none;--NI:lightgray;--HZ:#fff;--AD:#fefefe;--lj:#577996;--LH:#353535}body.tb{--w9:#c1bebe;--NT:#151515;--A1:#2a2a2a;--ET:#666666;--pu:#404262;--ib:#8082b3;--HR:#cecece;--XO:#252525;--w1:#5f5f5f;--GD:#3e3e3e;--uC:#262626;--hc:#c5c5c5;--TN:#393939;--BN:#464646;--du:#272727;--XS:#df9273;--iH:#191a1c;--U8:#42424f;--TV:#000;--Vn:#ededed;--po:#606473;--NP:#171717;--Go:#5f6c8c;--dd:#272727;--Fs:#e0e0e0;--wq:#898989;--y9:#232323;--wn:#b5b4b4;--R9:#dddddd;--Ij:#2a2a32;--cb:invert(0.8);--VA:#dedede;--Dq:#454545;--h6:#222222;--r5:#5380c3;--I3:#4e4e4e;--zI:#151515;--go:#27272766;--CV:#7c7c7c;--kb:#617bb5;--MY:#657bab;--q0:#2a2a2a;--wU:#212121;--DW:#fff;--py:#1d1d1d;--Um:#3c3c3c;--St:shaker,tbcham;--Q3:#6f6f6f24;--_M:invert(0.15);--ki:#313131;--ZQ:#171717;--rn:contrast(2);--Gx:#202124;--SW:#010101;--bS:#c2c2c2;--t3:#c4c4c4;--E5:#8c4a2d;--tl:#9f7c6d;--l6:brightness(190%);--eQ:#24262b;--et:invert(1);--w4:scaleX(-1);--ri:#393939;--VE:brightness(0) 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var(--ki);border-radius:2px;background:var(--ZQ);cursor:pointer;-webkit-user-select:none;user-select:none}#clear-input:hover>img{filter:hue-rotate(115deg) brightness(1.5) saturate(3)}#random-input{display:flex;align-items:center;justify-content:center;padding:0 10px;border:1px solid var(--ki);border-radius:2px;background:var(--ZQ);cursor:pointer}#random-input:hover>img{filter:var(--rn)}#smart-transform{display:flex;align-items:center;justify-content:center;padding:0 24px 0 20px;border:1px solid var(--ki);border-radius:2px;background:var(--ZQ);cursor:pointer}#smart-transform>img{transition:opacity 0.3s ease,filter 0.3s ease}#random-input{padding:0 16px}#start-drawing{border-radius:12px 0 0 12px}#load-image:hover,#start-drawing:hover,#last-uploaded-image:hover{background:var(--AD)}#bookmark-container{display:flex;justify-content:center;padding:5px 0}.bookmark-line{font-family:'Roboto',sans-serif;font-size:1em;color:var(--w9);padding:12px 24px;border:1px solid var(--U8);background:var(--Gx);border-radius:32px}.bformula{font-family:'Roboto',sans-serif;font-size:0.9em;margin:0 4px 0 4px;padding:2px 8px 2px 8px;border:1px solid gray;border-radius:10px;box-shadow:1px 1px 1px var(--SW)}.bookmark-line::first-letter{color:var(--XS)}.info-text .katex{font-size:1.05em;font-weight:600}#tohome{text-decoration:none}.inline-block{display:inline-block}.privacy{color:inherit;white-space:nowrap}.flex{display:flex}@media (max-width:600px){.plot-bottom{flex-direction:column;width:100%}#coord-label{border-width:0 1px 1px 1px}.plot-funcs{border-width:0 1px 1px 1px;margin:inherit}#download-graph{display:none}}.a-name{display:inline-flex;align-items:center;color:var(--bS);padding:8px 16px 8px 8px;border:1px solid var(--kb);border-radius:8px}/**/.to-complex{cursor:pointer}#last-uploaded-image{display:flex;align-items:center;justify-content:center;width:28px;border:1.5px solid #a9b2e0;border-width:2px 0 2px 2px;cursor:pointer}@media (max-width:450px){#last-uploaded-image{display:none}}@media (max-width:360px){#calc-settings-content{padding:10px 10px}}#start-drawing,#start-photo,#load-image{display:flex;align-items:center;justify-content:center;min-height:3rem;min-width:6rem}#start-drawing{min-width:3rem}#start-photo{display:none!important}#start-drawing,#load-image{position:relative;border:dotted;border-width:2px 0 2px 2px;cursor:pointer}#start-drawing{border-style:solid}#load-image.active-drag img{display:none}#load-image::before{position:absolute;top:2px;color:var(--t3);font-family:'Roboto',sans-serif;font-size:0.7em;content:"Print Screen &"}.macintosh #load-image::before{display:none}#load-image::after{position:absolute;bottom:0;color:var(--t3);font-family:'Roboto',sans-serif;font-size:0.7em;content:"CTRL+V"}.macintosh #load-image::after{content:"\2318+V"}#load-image.active-drag{border-color:var(--E5)!important;background:var(--tl)!important}#load-image,#last-uploaded-image,#start-drawing{border-color:var(--po)}#start-photo,#load-image{background:var(--NP)}.photo-svg{height:24px;filter:var(--l6)}.tooltip-btn{transition:all 0.2s ease}.tooltip-btn:active{transform:translateY(0)}#load-image>input[type="file"]{display:none}.input-main{display:flex;flex-grow:1}/**/@media (max-width:1040px){#header-middle,#menu-calc-middle{border-width:0!important}#middle-content{padding:8px 8px 64px 8px;border-width:0 0}}@media (max-width:800px){#start-drawing{flex-grow:1}#middle-content{padding:8px 0 64px 0}#load-image{min-width:70px}}@media (max-width:450px){#start-drawing{display:none}}#watch-pixel{position:absolute;width:1px;height:1px;top:500px;left:0;z-index:2147483647}/*qr*/#link-qrcode{display:none}@media (min-width:1000px){#link-qrcode{display:block;position:relative;height:0}#link-qrcode>div{position:absolute;top:0;right:0;z-index:1;background:#edf0ff;border-radius:50%;filter:var(--et)}#link-qrcode>div:not(:empty){padding:8px}#link-on-solve::after{display:inline-block}}#keyboard-button{transition:transform .4s ease-in-out}body.fully-scrolled:not(.inrender) #keyboard-button{transform:translate(0,100%)}.calc-method{display:flex;gap:4px;margin-right:2px;margin-left:auto}.switch{position:relative;display:flex;align-items:center;justify-content:end;width:64px;height:100%;cursor:pointer}.switch>img{padding-right:8px;width:16px;height:16px;z-index:1;filter:var(--VE)}.switch>input{opacity:0;width:0;height:0}.slider{position:absolute;display:flex;align-items:center;width:64px;top:0;left:0;right:0;bottom:0;border:1px solid var(--ki);border-radius:24px}.slider:before{position:absolute;content:"";height:24px;width:24px;left:4px;background-color:var(--mO);transition:transform .4s,background .4s;border-radius:50%}input:checked + .slider:before{transform:translateX(32px);background-color:var(--t3)}#math-canvas:empty,#math-generated-canvas:empty{display:none!important}/**/#keyboard-button{position:fixed;bottom:0;right:20%;padding:6px;width:60px;height:24px;background:url(/logo/keyboard.svg) 50% / 54% no-repeat, var(--HZ);border:1px solid var(--NI);border-width:1px 1px 0 1px;border-radius:2px 2px 0 0;cursor:pointer;z-index:18}button,input,select{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}button{-webkit-appearance:button}button::-moz-focus-inner{border-style:none;padding:0}button:-moz-focusring{outline:1px dotted ButtonText}[type="checkbox"],[type="radio"]{box-sizing:border-box;padding:0}body.is-app #download-graph,body.is-app #arrow-top{display:none!important}.calc-settings-funcs{height:32px;width:100px;font-size:1.1em;font-family:'Roboto',sans-serif;color:var(--Fs);background:var(--y9);border:2px solid var(--po);border-radius:8px;text-align:center;transition:all 0.2s ease;outline:2px solid var(--lj)}.calc-settings-funcs:focus{outline:2px solid var(--lj)}.set-limits{height:32px;width:100px;margin-right:-3px;font-family:'Roboto',sans-serif;font-size:1.1em;color:var(--LH);border:1px solid #616161;border-radius:8px;background-color:var(--y9);text-align:center;border:2px solid var(--po);background:var(--NP);transition:all 0.2s ease;box-sizing:border-box}.set-limits:focus{color:var(--R9)!important;outline:2px solid var(--lj);color:var(--R9);border-color:var(--Go);box-shadow:0 0 0 3px rgba(155, 177, 234, 0.15);outline:none}.set-limits:hover{border-color:var(--Go)}.set-limits::placeholder{color:var(--wn);opacity:0.4}/*app*/.app-banner{display:flex;justify-content:center;width:100%;padding:20px 32px;border:solid var(--w1);border-width:1px 0 0 0;background:var(--NT);box-sizing:border-box}body.inrender .app-banner{display:none}.macintosh .app-banner,.macintosh .app-float-btn,body.is-app .app-banner,body.is-app .app-float-btn{display:none!important}.app-banner-inner{display:flex;align-items:center;justify-content:space-between;max-width:1000px;width:100%;gap:16px;flex-wrap:wrap;box-sizing:border-box}.app-banner-text{font-family:'Roboto', sans-serif;font-size:1.15em;font-weight:500;color:var(--bS);flex-shrink:0}.app-banner-links{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0}.app-banner-link{display:inline-flex;align-items:center;gap:12px;padding:12px 28px;padding-right:44px;font-family:'Roboto', sans-serif;font-size:1em;font-weight:500;color:#f3f3f3;text-decoration:none;border:none;border-radius:12px;background:#303030;box-shadow:0 4px 12px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.08);box-sizing:border-box;transition:transform 200ms ease, box-shadow 200ms ease, background 200ms ease;white-space:nowrap;cursor:pointer;-webkit-tap-highlight-color:#0000}.app-banner-icon{flex-shrink:0;filter:brightness(0) invert(1)}.app-banner-link:hover{color:#fff;transform:translateY(-2px);background:#212121;box-shadow:0 6px 18px rgba(0, 0, 0, 0.22), 0 2px 5px rgba(0, 0, 0, 0.1)}body.tb .app-banner-link{background:#393939;box-shadow:0 4px 12px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2)}body.tb .app-banner-link:hover{background:#414141;box-shadow:0 6px 18px rgb(48 48 48 / 40%), 0 2px 5px rgba(0, 0, 0, 0.25)}@media screen and (max-width:600px){.app-banner{padding:16px}.app-banner-inner{flex-direction:column;align-items:stretch;text-align:center}.app-banner-links{flex-direction:column}.app-banner-link{justify-content:center}}/*app-button*/.app-float-btn{position:fixed;bottom:26px;left:18px;display:flex;align-items:center;gap:0;text-decoration:none;z-index:18;-webkit-tap-highlight-color:#0000;touch-action:manipulation;cursor:pointer;outline:none}.app-float-btn-ring{position:absolute;inset:-4px;border-radius:18px;border:2px solid var(--kb);opacity:0;animation:app-ring 2.8s ease-out 1.5s 2 forwards;pointer-events:none}@keyframes app-ring{0%{opacity:0;transform:scale(0.85)}30%{opacity:0.5}100%{opacity:0;transform:scale(1.15)}}.app-float-btn-body{position:relative;display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:15px;background:var(--eQ);border:1px solid var(--w1);box-shadow:0 1px 3px rgba(0,0,0,0.06),0 4px 12px rgba(0,0,0,0.08);transition:transform 250ms cubic-bezier(.4,.0,.2,1),box-shadow 250ms cubic-bezier(.4,.0,.2,1),border-color 250ms ease;flex-shrink:0}.app-float-btn-icon{position:absolute;color:var(--w9);opacity:0.55;transition:opacity 250ms ease, transform 250ms ease}.app-float-btn-droid{position:absolute;width:38px;height:38px;opacity:0.7;transform:scale(0.9);transition:opacity 250ms ease, transform 250ms ease}.app-float-btn-label{position:absolute;left:54px;top:0;white-space:nowrap;font-family:'Roboto',sans-serif;font-size:0.82em;font-weight:500;letter-spacing:0.01em;color:var(--w9);background:var(--eQ);border:1px solid var(--w1);border-radius:10px;padding:6px 14px;box-shadow:0 2px 8px rgba(0,0,0,0.08);opacity:0;transform:translateX(-8px);pointer-events:none;transition:opacity 200ms ease,transform 200ms cubic-bezier(.4,.0,.2,1)}.app-float-btn-label::before{content:"";position:absolute;left:-5px;top:50%;transform:translateY(-50%) rotate(45deg);width:8px;height:8px;background:var(--eQ);border-left:1px solid var(--w1);border-bottom:1px solid var(--w1)}.app-float-btn:hover .app-float-btn-body,.app-float-btn:focus-visible .app-float-btn-body{transform:translateY(-2px) scale(1.04);border-color:var(--kb);box-shadow:0 2px 6px rgba(0,0,0,0.08),0 8px 24px rgba(0,0,0,0.12)}.app-float-btn:hover .app-float-btn-icon{opacity:0;transform:scale(0.6)}.app-float-btn:hover .app-float-btn-droid{opacity:1;transform:scale(1.05)}.app-float-btn:hover .app-float-btn-label,.app-float-btn:focus-visible .app-float-btn-label{opacity:1;transform:translateX(0)}.app-float-btn:active .app-float-btn-body{transform:translateY(0) scale(0.97);box-shadow:0 1px 3px rgba(0,0,0,0.10)}body.tb .app-float-btn-body{box-shadow:0 1px 3px rgba(0,0,0,0.15),0 4px 12px rgba(0,0,0,0.2)}body.tb .app-float-btn:hover .app-float-btn-body{box-shadow:0 2px 6px rgba(0,0,0,0.2),0 8px 24px rgba(0,0,0,0.3)}body.tb .app-float-btn-label{box-shadow:0 2px 8px rgba(0,0,0,0.2)}@media screen and (max-width:600px){.app-float-btn-droid{width:34px;height:34px}}@media screen and (max-width:400px){.app-float-btn{bottom:18px;left:12px}.app-float-btn-body{width:42px;height:42px;border-radius:13px}.app-float-btn-icon{width:18px;height:18px}.app-float-btn-label{left:48px;font-size:0.78em;padding:5px 12px}.app-float-btn-ring{border-radius:16px}}.app-float-btn.at-footer{opacity:0;pointer-events:none;transition:opacity 300ms ease}.app-float-btn{opacity:1;pointer-events:auto;transition:opacity 350ms ease,transform 400ms cubic-bezier(.4,.0,.2,1)}body.fully-scrolled .app-float-btn,body.inrender .app-float-btn,.app-float-btn.hide-app-button{opacity:0;pointer-events:none}/*app*/.promo-showcase-main{display:flex;justify-content:center;align-items:center;width:100%;padding:0 2px;box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin-bottom:12px}.promo-link-main{display:block;width:800px;max-width:100%;border-radius:10px;overflow:hidden;position:relative}.promo-visual-main{position:relative;width:100%;border-radius:10px;overflow:hidden;transition:filter 0.3s ease, transform 0.3s ease}.promo-visual-main{background:#f6f6f6}.tb .promo-visual-main{background:#282828}.tb .promo-img-main{filter:invert(1)}.promo-img-main,.promo-img-first,.promo-img-second{display:block;width:100%;height:auto;border-radius:10px}.promo-img-first,.promo-img-second{position:absolute;top:0;left:0;background:none}.promo-img-first{animation:phone-first 6s ease-in-out infinite}.promo-img-second{animation:phone-second 6s ease-in-out infinite}@keyframes phone-first{0%{transform:translate(12px, 12px) scale(1) rotate(0deg)}25%{transform:translate(18px, 20px) scale(1.015) rotate(0.5deg)}50%{transform:translate(10px, 24px) scale(0.99) rotate(-0.3deg)}75%{transform:translate(5px, 16px) scale(1.01) rotate(0.2deg)}100%{transform:translate(12px, 12px) scale(1) rotate(0deg)}}@keyframes phone-second{0%{transform:translate(12px, 12px) scale(1) rotate(0deg)}25%{transform:translate(7px, 6px) scale(0.985) rotate(-0.4deg)}50%{transform:translate(15px, 2px) scale(1.012) rotate(0.3deg)}75%{transform:translate(18px, 9px) scale(0.99) rotate(-0.2deg)}100%{transform:translate(12px, 12px) scale(1) rotate(0deg)}}.promo-mobile .promo-link-main{min-width:320px;max-width:420px;width:100%;box-shadow:2px 2px 1px var(--uC)}.promo-mobile .promo-visual-main{min-width:320px;max-width:420px;width:100%}.promo-label-main{position:absolute;top:8px;left:10px;font-family:"Roboto", sans-serif;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:0.6px;color:rgba(255, 255, 255, 0.85);background:#8080806e;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);padding:3px 8px;border-radius:4px;pointer-events:none;user-select:none}.tb .promo-label-main{background:#5353536e}.promo-mobile .promo-label-main{font-size:8px;display:flex;align-items:center;justify-content:center;padding:2px 5px;top:5px;left:6px;border-radius:16px}.promo-link-main:hover .promo-visual-main{transform:scale(1.01)}