@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-cyrillic-ext-400-normal-CWV284fw.woff2) format("woff2"),url(/assets/source-serif-4-cyrillic-ext-400-normal-DLkyKLvH.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-cyrillic-400-normal-C44pakCn.woff2) format("woff2"),url(/assets/source-serif-4-cyrillic-400-normal-B8Z6Jvzv.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-greek-400-normal-Cw5-AHNN.woff2) format("woff2"),url(/assets/source-serif-4-greek-400-normal-BccYJ-vZ.woff) format("woff");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-vietnamese-400-normal-BbG3LG1A.woff2) format("woff2"),url(/assets/source-serif-4-vietnamese-400-normal-DR1UuFon.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-latin-ext-400-normal-Cp7z-ARB.woff2) format("woff2"),url(/assets/source-serif-4-latin-ext-400-normal-CEpydyUl.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-latin-400-normal-DJ5YJwmz.woff2) format("woff2"),url(/assets/source-serif-4-latin-400-normal-Dn3IlU-Z.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(/assets/source-serif-4-cyrillic-ext-600-normal-D_E8FDgP.woff2) format("woff2"),url(/assets/source-serif-4-cyrillic-ext-600-normal-DiT2IGQm.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(/assets/source-serif-4-cyrillic-600-normal-BDP5YDHD.woff2) format("woff2"),url(/assets/source-serif-4-cyrillic-600-normal-DFnC3vAY.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(/assets/source-serif-4-greek-600-normal-DdRkKr-1.woff2) format("woff2"),url(/assets/source-serif-4-greek-600-normal-DhXQw1Kl.woff) format("woff");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(/assets/source-serif-4-vietnamese-600-normal-CznyfUKR.woff2) format("woff2"),url(/assets/source-serif-4-vietnamese-600-normal-B0WJbuqT.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(/assets/source-serif-4-latin-ext-600-normal-0sIUyHMO.woff2) format("woff2"),url(/assets/source-serif-4-latin-ext-600-normal-C6NNqpJh.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:"Source Serif 4";font-style:normal;font-display:swap;font-weight:600;src:url(/assets/source-serif-4-latin-600-normal-DouSKlru.woff2) format("woff2"),url(/assets/source-serif-4-latin-600-normal-DMD1h6_f.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:"Source Serif 4";font-style:italic;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-cyrillic-ext-400-italic-zoDFlEzN.woff2) format("woff2"),url(/assets/source-serif-4-cyrillic-ext-400-italic-Dx4A8QUO.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:"Source Serif 4";font-style:italic;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-cyrillic-400-italic-BLN19cOa.woff2) format("woff2"),url(/assets/source-serif-4-cyrillic-400-italic-Dx8qIUN3.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:"Source Serif 4";font-style:italic;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-greek-400-italic-C7D4Dq0H.woff2) format("woff2"),url(/assets/source-serif-4-greek-400-italic-DcuniPAV.woff) format("woff");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:"Source Serif 4";font-style:italic;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-vietnamese-400-italic-CjUPRDIa.woff2) format("woff2"),url(/assets/source-serif-4-vietnamese-400-italic-DyjhI2GX.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:"Source Serif 4";font-style:italic;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-latin-ext-400-italic-JynPwBMj.woff2) format("woff2"),url(/assets/source-serif-4-latin-ext-400-italic-G7LDTi7t.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:"Source Serif 4";font-style:italic;font-display:swap;font-weight:400;src:url(/assets/source-serif-4-latin-400-italic-0j97Jm6B.woff2) format("woff2"),url(/assets/source-serif-4-latin-400-italic-Dv9jnFA_.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--ink: #0a0a0a;--ink-2: #3a3a3a;--ink-3: #767676;--hairline: #dddddd;--bg: #ffffff;--surface: #ffffff;--accent: #1e3a5f;--wash-right: #f4f8f4;--wash-wrong: #fbf4f4;--sp-xs: 4px;--sp-sm: 8px;--sp-md: 16px;--sp-lg: 24px;--sp-xl: 32px;--sp-xxl: 48px;--fs-small: 14px;--lh-small: 1.45;--fs-body: 16px;--lh-body: 1.5;--fs-h3: 20px;--lh-h3: 1.4;--fs-h2: 24px;--lh-h2: 1.35;--fs-h1: 32px;--lh-h1: 1.25;--max-content: 720px;--page-padding-inline: var(--sp-lg);--motion-fade-in: .15s ease-out}@media(max-width:600px){:root{--page-padding-inline: var(--sp-md)}}@media(prefers-color-scheme:dark){:root{--ink: #e8e6e3;--ink-2: #a8a6a3;--ink-3: #6e6c6a;--hairline: #2a2a2a;--bg: #161616;--surface: #1f1f1f;--accent: #6b8fb8;--wash-right: #1a2620;--wash-wrong: #2a1a1a}}@media(prefers-reduced-motion:reduce){:root{--motion-fade-in: 0ms}}html{color-scheme:light dark}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:"Source Serif 4",Georgia,Times New Roman,serif;font-size:var(--fs-body);line-height:var(--lh-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#app{min-height:100vh;min-height:100svh}main{max-width:var(--max-content);margin-inline:auto;padding-inline:var(--page-padding-inline);padding-block:var(--sp-xl)}h1{font-size:var(--fs-h1);line-height:var(--lh-h1);font-weight:600;margin:0 0 var(--sp-md)}h2{font-size:var(--fs-h2);line-height:var(--lh-h2);font-weight:600;margin:var(--sp-xl) 0 var(--sp-sm)}h3{font-size:var(--fs-h3);line-height:var(--lh-h3);font-weight:600;margin:var(--sp-lg) 0 var(--sp-sm)}p{margin:0 0 var(--sp-md)}small,.small{font-size:var(--fs-small);line-height:var(--lh-small);color:var(--ink-3)}a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}button{font:inherit;font-family:inherit;background:var(--bg);color:var(--ink);border:1px solid var(--ink);border-radius:0;padding:var(--sp-sm) var(--sp-md);min-height:44px;cursor:pointer}button:disabled{border-color:var(--hairline);color:var(--ink-3);cursor:not-allowed}input[type=text],input[type=number],input:not([type]){font-family:inherit;font-size:var(--fs-body);background:var(--bg);color:var(--ink);border:1px solid var(--hairline);border-radius:0;padding:var(--sp-sm) var(--sp-md);min-height:44px}:focus-visible{outline:2px solid var(--accent);outline-offset:1px}hr{border:0;border-top:1px solid var(--hairline);margin:var(--sp-lg) 0}.tabular{font-variant-numeric:tabular-nums}.home-list,.topic-list{list-style:none;margin:0;padding:0}.home-list li,.topic-list li{border-bottom:1px solid var(--hairline);padding:var(--sp-md) 0;display:flex;flex-direction:column;gap:var(--sp-xs)}.home-list a,.topic-list a{font-size:var(--fs-h3);text-decoration:none}.home-list a:hover,.topic-list a:hover{text-decoration:underline}.home-list__hint,.topic-list__example{display:block}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--sp-md)}.topic-label{text-transform:none}.problem-prompt{font-size:var(--fs-h2);line-height:var(--lh-h2);font-weight:400;margin:var(--sp-lg) 0 var(--sp-md)}.answer-row{display:flex;flex-wrap:wrap;gap:var(--sp-md);align-items:flex-start;margin:var(--sp-md) 0}.number-input{display:flex;flex-direction:column;gap:var(--sp-xs)}.number-input input{min-width:200px}.number-input--error input{border-color:var(--ink);border-bottom-color:#a22a2a}.number-input__error{font-size:var(--fs-small);color:#a22a2a}.link-button{background:transparent;border:0;padding:0;min-height:0;color:var(--accent);text-decoration:underline;text-underline-offset:2px;cursor:pointer;font-family:inherit;font-size:inherit}.link-button:hover{color:var(--accent)}.grade,.help-block{margin-top:var(--sp-lg);padding:var(--sp-md);border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline)}.grade--right{background:var(--wash-right)}.grade--wrong{background:var(--wash-wrong)}.grade__label{font-size:var(--fs-h3);font-weight:600;margin:0 0 var(--sp-sm)}.explanation p{margin:0 0 var(--sp-sm)}.explanation p:last-child{margin-bottom:0}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0a0a80;display:flex;align-items:center;justify-content:center;z-index:100}.modal-panel{background:var(--surface);border:1px solid var(--ink);padding:var(--sp-lg);max-width:480px;width:calc(100% - 2 * var(--sp-md));outline:none}.modal-panel h2{margin-top:0}.modal-buttons{display:flex;gap:var(--sp-md);margin-top:var(--sp-lg)}.pomodoro-start{background:transparent;border:1px solid var(--hairline);padding:var(--sp-xs) var(--sp-sm);min-height:32px;color:var(--ink);font-size:var(--fs-small)}.pomodoro-chip{position:fixed;bottom:var(--sp-md);right:var(--sp-md);background:var(--surface);border:1px solid var(--hairline);padding:var(--sp-sm) var(--sp-md);font-size:var(--fs-body);z-index:50;display:flex;align-items:center;gap:var(--sp-md)}.pomodoro-chip--break{font-style:italic}.pomodoro-chip__resume{background:transparent;border:1px solid var(--ink);padding:var(--sp-xs) var(--sp-sm);min-height:32px;font-size:var(--fs-small)}.pomodoro-overlay{position:fixed;bottom:var(--sp-xl);left:50%;transform:translate(-50%);background:var(--surface);border:1px solid var(--ink);padding:var(--sp-lg);max-width:360px;width:calc(100% - 2 * var(--sp-md));z-index:50;animation:fade-in var(--motion-fade-in)}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.pomodoro-overlay__message{margin:0 0 var(--sp-md)}.pomodoro-overlay__buttons{display:flex;gap:var(--sp-sm)}.toast{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--hairline);padding:var(--sp-sm) var(--sp-lg);font-size:var(--fs-small);text-align:center;z-index:60}.aufgabe-list{list-style:none;margin:0;padding:0}.aufgabe-list__item{border-top:1px solid var(--hairline);padding:var(--sp-lg) 0;display:grid;grid-template-columns:100px 1fr;grid-template-areas:"number prompt" ".      input";gap:var(--sp-sm) var(--sp-md)}.aufgabe-list__item:last-child{border-bottom:1px solid var(--hairline)}.aufgabe-list__number{grid-area:number;padding-top:var(--sp-xs)}.aufgabe-list__prompt{grid-area:prompt;font-size:var(--fs-body);line-height:var(--lh-body)}.aufgabe-list__input{grid-area:input}@media(max-width:600px){.aufgabe-list__item{grid-template-columns:1fr;grid-template-areas:"number" "prompt" "input"}}.submit-row{margin-top:var(--sp-xl)}.result-summary{font-size:var(--fs-body);line-height:var(--lh-body);margin:0 0 var(--sp-sm)}.result-elapsed{margin:0 0 var(--sp-md)}.result-rows{list-style:none;margin:0;padding:0;border-top:1px solid var(--hairline)}.result-row{border-bottom:1px solid var(--hairline)}.result-row--right{background:var(--wash-right)}.result-row--wrong{background:var(--wash-wrong)}.result-row__head{width:100%;background:transparent;border:0;padding:var(--sp-sm) var(--sp-md);min-height:44px;display:grid;grid-template-columns:100px 32px 1fr;align-items:center;text-align:left;font-family:inherit;font-size:var(--fs-body);color:var(--ink);cursor:pointer}.result-row__head:hover{text-decoration:none}.result-row__label{font-weight:600}.result-row__mark{font-family:inherit}.result-row__mark--wrong{font-style:italic}.result-row__points{text-align:right;font-variant-numeric:tabular-nums}.result-row__body{padding:0 var(--sp-md) var(--sp-md);border-top:1px dashed var(--hairline)}.result-row__body p{margin:var(--sp-sm) 0}.result-cta{margin-top:var(--sp-xl);font-size:var(--fs-body)}