@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&display=swap');
.cloze{background:#edf2ff;color:#235cea;border-radius:6px;padding:2px 7px;font-weight:600}.cloze.revealed{background:#e4f6ef;color:#20724e}.cloze-tools,.cloze-tabs{display:flex;gap:8px;flex-wrap:wrap}.cloze-preview{background:#f6f8fc;border:1px solid #e0e7f1;border-radius:10px;padding:15px;margin-top:16px}.cloze-tabs{margin:12px 0}.cloze-tabs .selected{color:#235cea;border-color:#235cea;background:#edf2ff}.cloze-sample{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.9}
:root{font-family:'Be Vietnam Pro',sans-serif;color:#17243a;background:#f6f8fc;font-synthesis:none;font-size:16px}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button{cursor:pointer}button,a,input,textarea,select{outline-offset:4px}button{border:0;background:none;color:inherit}.shell{min-height:100vh;display:grid;grid-template-columns:240px 1fr}.sidebar{background:#fff;border-right:1px solid #e6ebf3;padding:36px 22px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.logo{font-size:30px;font-weight:800;letter-spacing:-1.5px;display:flex;gap:12px;align-items:center}.mark{background:#235cea;color:#fff;border-radius:13px;padding:3px 12px;font-size:30px;box-shadow:0 5px 15px #235cea25}.brand-note{color:#8a95a7;font-size:12px;margin:12px 0 42px 4px;letter-spacing:2px}.nav{display:flex;flex-direction:column;gap:8px}.nav button{text-align:left;padding:14px 16px;border-radius:10px;font-weight:500;font-size:14px;display:flex;gap:13px;align-items:center}.nav button.active{background:#edf2ff;color:#235cea}.nav button:hover{background:#f0f4fc}.nav svg{width:19px;height:19px}.side-bottom{margin-top:auto;padding:22px 8px 0;border-top:1px solid #e7edf5;font-size:12px;color:#8190a5;line-height:1.8}.local-dot{color:#2f976c}main{max-width:1200px;width:100%;margin:auto;padding:38px 48px 50px}.topbar{display:flex;justify-content:space-between;align-items:center;color:#7d8a9f;font-size:14px;margin-bottom:38px}.avatar{border:1px solid #dbe4f2;border-radius:50%;width:38px;height:38px;display:grid;place-items:center;background:white;color:#235cea;font-weight:600}.heading{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:28px}h1{font-size:30px;letter-spacing:-1px;margin:0 0 9px}h2{font-size:19px;margin:0}p{line-height:1.7}.muted{color:#7b889c;font-size:14px;margin:0}.primary{background:#235cea;color:white;border-radius:9px;padding:13px 20px;font-weight:600;font-size:14px;box-shadow:0 4px 9px #235cea18}.primary:hover{background:#194bc8}.secondary{border:1px solid #dde5f0;border-radius:9px;padding:11px 16px;background:#fff;font-size:14px}.study-banner{background:#e9f0ff;border:1px solid #d8e4ff;border-radius:16px;display:flex;align-items:center;justify-content:space-between;padding:28px 32px;margin:26px 0;gap:20px}.eyebrow{font-size:12px;font-weight:600;letter-spacing:1.6px;color:#5275b5}.study-banner h2{font-size:24px;margin:10px 0}.study-banner p{color:#60769a;font-size:14px;margin:0}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px}.stat{background:white;border:1px solid #e3e9f2;border-radius:12px;padding:20px 24px}.stat label{font-size:13px;color:#7b889c}.stat strong{display:block;font-size:29px;margin-top:9px;letter-spacing:-1px}.stat small{font-size:12px;font-weight:400;color:#94a0b1;margin-left:8px;letter-spacing:0}.section-line{display:flex;justify-content:space-between;align-items:center;margin:30px 0 18px}.section-line span{font-size:13px;color:#8a96a8}.decks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.deck{background:#fff;border:1px solid #e0e7f1;border-radius:14px;padding:24px;transition:transform .2s,box-shadow .2s}.deck:hover{transform:translateY(-2px);box-shadow:0 8px 25px #192e5410}.deck-top{display:flex;justify-content:space-between;align-items:center}.deck-icon{background:#edf2ff;border-radius:12px;color:#3769d4;font-size:23px;width:49px;height:49px;display:grid;place-items:center}.deck:nth-child(2n) .deck-icon{background:#fff2e8;color:#ba743a}.menu-btn{font-size:20px;color:#8391a5;border-radius:6px;padding:4px 10px}.deck h3{font-size:17px;margin:21px 0 9px}.deck-description{height:40px;font-size:13px;line-height:1.6;color:#8290a3;margin:0 0 17px}.deck-bottom{border-top:1px solid #eef1f6;padding-top:17px;display:flex;justify-content:space-between;align-items:center;gap:8px}.count{font-size:12px;color:#8793a4}.count b{font-size:14px;color:#235cea}.text-btn{color:#235cea;font-weight:600;font-size:13px}.empty{text-align:center;padding:60px 20px;background:#fff;border:1px dashed #d8e2f0;border-radius:14px;color:#7a889d}.footer-note{text-align:center;color:#97a2b2;font-size:12px;margin-top:32px}.toolbar{display:flex;gap:12px;margin-bottom:20px}.toolbar input{flex:1;min-width:0}.field{display:flex;flex-direction:column;gap:8px;margin:18px 0;font-size:14px}input,textarea,select{border:1px solid #dce4ef;background:#fff;border-radius:8px;padding:12px;color:#25354c;width:100%}textarea{resize:vertical;min-height:95px}dialog{width:510px;max-width:calc(100% - 28px);border:1px solid #e2e8f0;border-radius:18px;padding:28px;color:#17243a;box-shadow:0 30px 90px #17243a30}dialog::backdrop{background:#15233c55;backdrop-filter:blur(3px)}.dialog-top{display:flex;justify-content:space-between;align-items:center}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.card-row{display:grid;grid-template-columns:1fr 1fr auto;gap:18px;align-items:center;padding:20px;background:#fff;border-bottom:1px solid #e8edf4;overflow-wrap:anywhere;font-size:14px}.card-row:first-child{border-radius:12px 12px 0 0}.card-row small{display:block;color:#8a96a7;margin-top:8px}.review{max-width:780px;margin:0 auto}.progress{height:5px;border-radius:5px;background:#e4eaf4;margin:26px 0}.progress>div{height:100%;background:#235cea;border-radius:5px;transition:width .2s}.flashcard{min-height:350px;background:white;border:1px solid #dce4f1;border-radius:20px;text-align:center;padding:42px 32px;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 12px 35px #1c397308}.flashcard .front{font-size:30px;white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%}.flashcard .answer{font-size:22px;color:#235cea;border-top:1px solid #e5ebf5;padding-top:24px;margin-top:26px;width:100%;white-space:pre-wrap;overflow-wrap:anywhere}.review-actions{text-align:center;margin:24px 0}.ratings{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.rating{background:#fff;border:1px solid #dce4ee;border-radius:10px;padding:14px 6px;font-size:14px}.rating small{display:block;color:#8b96a7;font-size:12px;margin-top:7px}.rating:nth-child(1){color:#c05b59}.rating:nth-child(2){color:#235cea;background:#edf2ff;border-color:#c9d8ff}.rating:nth-child(3){color:#328668}.notice{background:#fff0d8;padding:14px;border-radius:8px;font-size:14px}.chart{display:flex;align-items:flex-end;height:180px;gap:18px;padding-top:25px}.bar-col{flex:1;text-align:center;height:100%;display:flex;flex-direction:column;justify-content:flex-end;gap:8px;font-size:12px;color:#8b96a6}.bar{background:#7398f5;min-height:3px;border-radius:6px 6px 0 0}.panel{background:white;border:1px solid #e1e8f1;border-radius:14px;padding:25px}.completion{font-size:55px;color:#235cea;margin-bottom:20px}.file-input{display:none}button:disabled{opacity:.45;cursor:not-allowed}@media(min-width:1500px){main{padding-top:50px}}@media(max-width:1000px){.shell{grid-template-columns:190px 1fr}.sidebar{padding:28px 15px}main{padding:28px}.decks{gap:12px}.deck{padding:19px}}@media(max-width:700px){.shell{display:block}.sidebar{position:static;height:auto;padding:18px 20px;border-right:0;border-bottom:1px solid #e1e7f0;display:block}.logo{font-size:24px}.mark{font-size:23px;border-radius:9px}.brand-note,.side-bottom{display:none}.nav{flex-direction:row;margin-top:18px;gap:4px}.nav button{font-size:12px;padding:10px;flex:1;justify-content:center;gap:6px}.nav svg{width:15px}.topbar{margin-bottom:24px}main{padding:23px 18px}h1{font-size:25px}.heading{align-items:flex-start}.heading .primary{padding:11px 13px;white-space:nowrap}.study-banner{padding:23px;display:block}.study-banner .primary{margin-top:20px}.stats{gap:8px}.stat{padding:16px 12px}.stat strong{font-size:24px}.stat label{font-size:12px}.stat small{display:none}.decks{grid-template-columns:1fr}.card-row{grid-template-columns:1fr;gap:8px}.card-row>div:last-child{justify-self:end}.toolbar{flex-wrap:wrap}.toolbar select{width:100%}.ratings{gap:6px}.rating{font-size:12px}.flashcard{padding:26px 20px;min-height:300px}.flashcard .front{font-size:25px}}
.auto-cloze-panel{display:grid;gap:12px;background:#edf2ff;border-radius:10px;padding:15px;margin:12px 0 18px}.auto-cloze-panel label{display:flex;align-items:center;gap:9px;font-size:14px}.auto-cloze-panel input[type=checkbox]{width:17px;height:17px;accent-color:#235cea;flex-shrink:0}.auto-cloze-panel p{font-size:12px}
.flashcard .cloze-input{display:inline-block;width:180px;max-width:100%;font-size:20px;border:2px solid #9bb8ff;background:#f4f7ff;text-align:center;margin:5px 3px;vertical-align:middle}.cloze-input:focus{border-color:#235cea;outline:2px solid #dce7ff}.answer-result{display:inline-flex;flex-direction:column;vertical-align:middle;gap:5px;margin:5px 3px}.answer-result small{font-size:13px;max-width:240px;white-space:pre-wrap;overflow-wrap:anywhere}.answer-result.correct small{color:#20724e}.answer-result.incorrect small{color:#b44343}
.flashcard .front{line-height:1.7}.flashcard .front>.cloze{display:inline;vertical-align:baseline}.answer-feedback{display:block;margin-top:20px;font-size:14px;line-height:1.6;white-space:normal}.answer-feedback>div+div{margin-top:6px}.answer-feedback .correct{color:#20724e}.answer-feedback .incorrect{color:#b44343}