:root{--ink:#20243b;--muted:#62667a;--purple:#4f46df;--purple-dark:#3d34bd;--purple-light:#eeedff;--yellow:#ffdf6d;--line:#e0e2ed;--paper:#fff;--bg:#f5f6fb;--green:#196342;--green-bg:#edf8f0;--orange:#804415;--orange-bg:#fff4e7;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--purple);outline-offset:4px}button{transition:background .15s,transform .15s,border-color .15s}[hidden]{display:none!important}h1,h2,h3,p{margin:0}a{color:inherit}.page{max-width:1220px;margin:0 auto;padding:0 42px}.site-header{height:116px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);gap:24px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none}.brand-icon{display:grid;place-items:center;background:var(--yellow);width:48px;height:52px;border-radius:14px 14px 14px 4px;font-weight:800;font-size:43px;line-height:1;padding-bottom:6px;transform:rotate(-5deg)}.brand strong{font-size:30px;letter-spacing:-1px;line-height:1.1;display:block}.brand-subtitle{display:block;font-size:11px;font-weight:700;letter-spacing:2px;margin-top:5px}.header-note{font-size:14px;color:var(--muted)}.workspace{display:grid;grid-template-columns:264px minmax(0,1fr);gap:62px;padding:40px 0 50px}.sidebar summary{font-size:21px;font-weight:750;list-style:none;margin-bottom:28px;pointer-events:none}.sidebar summary::-webkit-details-marker{display:none}.summary-icon{display:none}fieldset{border:0;padding:0;margin:0 0 23px;min-width:0}legend,.field-label{font-size:14px;font-weight:650;margin-bottom:11px;display:block}.topic-option{display:flex;align-items:center;gap:10px;padding:11px 12px;margin-bottom:7px;border:1px solid var(--line);border-radius:10px;background:transparent;cursor:pointer;min-height:44px}.topic-option:has(input:checked){background:white;border-color:#c3bfef}.topic-option input{accent-color:var(--purple);width:17px;height:17px;margin:0;flex-shrink:0}.topic-option .topic-name{font-size:15px;flex:1;font-weight:550}.topic-option .topic-count{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.topic-option small{font-size:12px;color:var(--muted);font-weight:400}.segmented{display:flex;background:#e9eaf2;padding:4px;border-radius:10px;gap:2px}.segmented label{flex:1;position:relative;cursor:pointer;min-width:0}.segmented input{position:absolute;width:1px;height:1px;opacity:0}.segmented span{font-size:14px;display:block;padding:10px 4px;text-align:center;border-radius:7px;white-space:nowrap}.segmented input:checked+span{background:white;color:var(--purple);box-shadow:0 1px 4px #20243b12;font-weight:650}.segmented input:focus-visible+span{outline:3px solid var(--purple);outline-offset:2px}select{width:100%;background:white;border:1px solid var(--line);border-radius:9px;color:var(--ink);padding:12px 10px;font-size:14px;margin-bottom:20px;min-height:44px}.button{display:inline-flex;justify-content:center;align-items:center;gap:20px;border:1px solid transparent;padding:14px 21px;border-radius:10px;font-weight:650;font-size:15px;min-height:48px;line-height:1.35}.button:active:not(:disabled){transform:translateY(1px)}.primary{background:var(--purple);color:white}.primary:hover:not(:disabled){background:var(--purple-dark)}.primary:disabled{opacity:.55}.secondary{background:white;border-color:var(--line);color:var(--ink)}.secondary:hover{background:var(--bg)}.start-button{width:100%;justify-content:space-between}.settings-message{font-size:12px;color:var(--muted);line-height:1.6;margin-top:11px}.study-note{display:flex;align-items:center;gap:12px;margin-top:27px;padding:18px 0;border-top:1px solid var(--line)}.note-mark{font-size:30px;color:var(--purple)}.study-note p{font-size:13px;color:var(--muted);line-height:1.75}.study-note 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40px #25274b05;min-height:466px}.card-meta{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:40px}.topic-badge{font-size:13px;font-weight:650;background:var(--purple-light);color:var(--purple);padding:7px 11px;border-radius:6px}.direction-badge{font-size:12px;letter-spacing:1px;color:var(--muted);font-weight:600}.answer-instruction{font-size:13px;color:var(--muted);margin-bottom:12px}#question{font-size:clamp(23px,2.5vw,32px);line-height:1.35;font-weight:650;letter-spacing:-.6px;margin-bottom:29px;overflow-wrap:anywhere;outline:none}.choices{display:grid;grid-template-columns:1fr 1fr;gap:11px}.choice{border:1.5px solid var(--line);background:white;border-radius:11px;min-height:65px;text-align:left;padding:14px 13px;display:flex;align-items:center;gap:12px;color:var(--ink);font-size:16px;overflow-wrap:anywhere}.choice .choice-number{display:grid;place-items:center;flex-shrink:0;font-size:12px;color:var(--muted);background:var(--bg);border-radius:5px;width:25px;height:25px}.choice:hover:not(:disabled){background:var(--purple-light);border-color:var(--purple)}.choice.correct{border-color:var(--green);background:var(--green-bg)}.choice.incorrect{border-color:#be7739;background:var(--orange-bg)}.choice:disabled:not(.correct):not(.incorrect){color:#7a7d8e;background:#fafaff}.choice-result{margin-left:auto;font-weight:700}#answer{width:100%;border:1.5px solid #c9cbdc;border-radius:10px;font-size:21px;padding:17px;color:var(--ink);background:white;min-width:0}#answer:disabled{background:var(--bg)}.accent-row{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin:13px 0}.accent-row>span{font-size:12px;color:var(--muted)}#accent-buttons{display:flex;gap:5px;flex-wrap:wrap}.accent-key{border:1px solid var(--line);border-radius:6px;min-width:32px;min-height:34px;color:var(--ink);background:var(--bg);font-size:15px}.accent-key:hover:not(:disabled){border-color:var(--purple);color:var(--purple)}.typing-hint{color:var(--muted);font-size:12px;line-height:1.6;margin:12px 0}.input-error{color:#9b351d;font-size:14px;margin-bottom:10px}.input-error:empty{display:none}.check-button{margin-top:7px}.feedback{margin-top:21px;background:var(--green-bg);color:var(--green);border-radius:10px;padding:16px 18px;line-height:1.6;border-left:3px solid var(--green)}.feedback.missed{background:var(--orange-bg);color:var(--orange);border-color:#be7739}.feedback strong{font-size:16px}.feedback p{font-size:14px}.feedback p:empty{display:none}#feedback-answer{font-weight:600;margin:4px 0}.card-footer{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:23px;min-height:42px}.text-button{border:0;background:transparent;color:var(--muted);font-size:13px;padding:10px 0;text-align:left}.text-button:hover{color:var(--purple)}.keyboard-hint{font-size:12px;color:var(--muted);text-align:center;margin-top:22px}.results{background:white;border:1px solid var(--line);border-radius:19px;padding:32px;text-align:center}.result-mark{display:inline-grid;place-items:center;background:var(--yellow);color:var(--ink);font-size:48px;width:65px;height:65px;border-radius:20px;transform:rotate(-8deg);font-weight:800;margin-bottom:22px;padding-bottom:10px}.results h2{font-size:30px;letter-spacing:-.7px;margin:10px 0}.result-score{font-size:26px;font-weight:700;color:var(--purple);margin:15px 0 10px}#result-note{font-size:15px;line-height:1.6;color:var(--muted)}.result-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:26px 0}#missed-section{text-align:left;margin-top:26px;border-top:1px solid var(--line);padding-top:23px}#missed-section h3{font-size:16px}#missed-list{list-style:none;padding:0;margin:12px 0 0}#missed-list li{padding:13px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.55}#missed-list li:last-child{border:0}#missed-list strong{display:block;color:var(--purple);font-size:16px;margin-top:3px}.load-error{background:white;border:1px solid var(--line);padding:28px;border-radius:15px}.load-error p{line-height:1.7;margin:16px 0}.page-footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px;padding:24px 0 30px}.page-footer>span:last-child{color:var(--purple);font-weight:650}.page-footer>span:last-child span{margin-left:7px}.muted{color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-100px;padding:12px;background:white;z-index:10}.skip-link:focus{top:12px}
@media(min-width:1500px){.page{max-width:1300px}.workspace{gap:78px;grid-template-columns:285px minmax(0,1fr)}}
@media(max-width:950px){.page{padding:0 25px}.workspace{gap:30px;grid-template-columns:230px minmax(0,1fr)}.flashcard{padding:25px}.header-note{font-size:12px}h1{font-size:25px}.choices{grid-template-columns:1fr}.card-meta{margin-bottom:27px}}
@media(max-width:700px){.page{padding:0 20px}.site-header{height:89px}.brand strong{font-size:26px}.brand-icon{width:40px;height:44px;font-size:37px}.brand-subtitle{font-size:9px;letter-spacing:1.5px}.header-note{display:none}.workspace{display:flex;flex-direction:column;gap:25px;padding:22px 0 32px}.sidebar{border:1px solid var(--line);border-radius:12px;padding:0 16px;background:#f0f0f9}.sidebar summary{display:flex;align-items:center;justify-content:space-between;pointer-events:auto;cursor:pointer;font-size:16px;margin:0;min-height:53px}.summary-icon{display:block}.sidebar details[open] summary{margin-bottom:18px}.sidebar details[open] .summary-icon{transform:rotate(180deg)}#categories{display:grid;grid-template-columns:1fr 1fr;gap:6px}.topic-option{margin:0;padding:10px 8px}.topic-option .topic-name{font-size:13px}.topic-option .topic-count{display:none}.study-note{display:none}.settings-message{margin-bottom:18px}.round-header{margin-bottom:20px}h1{font-size:25px}.round-stats{margin-bottom:18px}.flashcard{padding:24px 20px;min-height:430px}.card-meta{margin-bottom:30px}.choices{grid-template-columns:1fr 1fr;gap:9px}.choice{padding:12px 10px;gap:8px;font-size:15px}.choice .choice-number{width:22px;height:24px;font-size:11px}#question{font-size:26px}.page-footer{font-size:11px;padding:22px 0}.results{padding:28px 20px}.card-footer{flex-wrap:wrap}}
@media(max-width:380px){.page{padding:0 14px}.choices{grid-template-columns:1fr}.round-header{gap:8px}h1{font-size:23px}.round-count{font-size:12px}.page-footer{flex-direction:column;gap:9px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}