@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Libre+Caslon+Display&display=swap');
:root{--paper:#f8f8f5;--white:#fff;--ink:#272633;--muted:#85848e;--purple:#6755a6;--light:#efecf7;--border:#e7e6e9;--green:#477264;--pink:#a46369}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',system-ui,sans-serif;font-size:14px;line-height:1.6}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #b7a4ee;outline-offset:3px}button{color:inherit}.sidebar{width:248px;position:fixed;inset:0 auto 0 0;background:#fff;border-right:1px solid var(--border);padding:35px 23px;display:flex;flex-direction:column;z-index:4}.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;letter-spacing:-.7px}.brand-mark{font-size:37px;line-height:1;color:var(--purple);font-weight:400}.brand-light{font-weight:450}.brand small{display:block;font-size:8px;letter-spacing:1.8px;color:var(--muted);margin-top:2px}.side-label{font-size:9px;letter-spacing:1.8px;font-weight:650;color:#a09eaa;margin:49px 12px 14px}nav{display:grid;gap:7px}nav a{display:flex;align-items:center;gap:12px;padding:12px 15px;border-radius:7px;font-size:13px;color:#75737f}nav a>span{font-size:19px;line-height:1;width:21px;text-align:center}nav a.active{background:var(--light);color:var(--purple);font-weight:650}nav a:hover{background:#f5f3fa}nav a small{font-size:10px;margin-left:auto;background:#f3f2f5;border-radius:5px;padding:1px 6px}.sidebar-bottom{margin-top:auto;padding:26px 12px 0}.progress-orbit{font-size:27px;color:var(--purple);margin-bottom:12px}.sidebar-bottom strong{font-size:13px}.sidebar-bottom p{font-size:12px;color:var(--muted);line-height:1.8;margin:6px 0 18px}.progress-track{height:4px;background:var(--light);border-radius:5px;overflow:hidden}.progress-track span{height:100%;display:block;background:var(--purple);transition:width .3s}.sidebar-bottom>small{display:block;font-size:10px;color:var(--muted);margin-top:9px}.text-button{padding:0;border:0;background:none;color:var(--purple);font-size:11px;text-align:left}.sidebar-bottom .text-button{margin-top:30px}.workspace{margin-left:248px}.topbar{height:84px;border-bottom:1px solid var(--border);padding:0 48px;display:flex;align-items:center;justify-content:space-between;gap:15px}.breadcrumb{font-size:9px;letter-spacing:1.4px;color:#7d7a87;font-weight:600}.breadcrumb span{margin:0 14px;color:#c5c1cc}.daily-button{background:transparent;border:1px solid #dedbe7;border-radius:6px;padding:8px 14px;font-size:11px;color:var(--purple)}main{padding:43px 48px 50px;max-width:1510px;margin:auto;min-height:calc(100vh - 160px)}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--purple);font-weight:650;margin:0 0 10px}.hero{display:flex;justify-content:space-between;align-items:center;gap:25px;margin-bottom:30px}.hero h1{font-family:'Libre Caslon Display',Georgia,serif;font-weight:400;letter-spacing:-1.2px;font-size:52px;line-height:1.12;margin:0 0 13px}.hero p:not(.eyebrow){color:#85828e;font-size:13px;margin:0;max-width:570px}.hero-art{flex-shrink:0;width:146px;height:121px;position:relative;color:#7d6aaf}.orbit{width:107px;height:107px;border:1px solid #d6cee8;border-radius:50%;position:absolute;top:5px;left:20px}.orbit:before,.orbit:after{content:'';position:absolute;width:107px;height:39px;border:1px solid #d6cee8;border-radius:50%;top:33px;left:-1px;transform:rotate(55deg)}.orbit:after{transform:rotate(-55deg)}.orbit span{position:absolute;font-size:44px;left:33px;top:15px}.star{position:absolute;font-size:19px;right:5px;top:0}.star.two{left:0;top:90px;font-size:13px}.stats-row{display:flex;gap:26px;align-items:center;border-bottom:1px solid var(--border);padding-bottom:23px;margin-bottom:25px}.stat{font-size:11px;color:var(--muted);display:flex;align-items:center;gap:7px}.stat b{font-size:14px;color:#514b65;font-weight:600}.stat-dot{width:6px;height:6px;background:#b7a6d4;border-radius:50%}.stat-dot.green{background:#a9c2b4}.stat-dot.rose{background:#d4b2b4}.toolbar{display:flex;align-items:center;gap:10px;margin:0 0 20px;flex-wrap:wrap}.search-wrap{display:flex;align-items:center;gap:10px;background:white;border:1px solid var(--border);border-radius:6px;padding:10px 14px;flex:1;min-width:200px;color:#a4a0ac}.search-wrap input{border:none;outline:none;background:none;width:100%;font-size:12px;color:var(--ink)}.search-wrap:focus-within{border-color:var(--purple)}.search-wrap input::placeholder{color:#a4a0ac}select{border:1px solid var(--border);background:white;border-radius:6px;padding:10px 12px;font-size:12px;color:#6d687b;max-width:100%}.view-tabs{display:flex;padding:3px;gap:2px;border:1px solid var(--border);border-radius:6px;background:#fff}.view-tabs button{border:0;background:none;padding:7px 12px;color:var(--muted);border-radius:4px;font-size:11px}.view-tabs button.active{background:var(--light);color:var(--purple)}.filter-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:24px}.filter-chip{border:1px solid var(--border);border-radius:99px;background:transparent;padding:6px 13px;font-size:10px;color:#85808e}.filter-chip.active{background:#6d5b9c;border-color:#6d5b9c;color:white}.results-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;gap:12px;color:#9a96a1;font-size:10px;letter-spacing:.2px}.results-meta strong{color:#706a7b;font-weight:500}.cluster-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.cluster-card{background:white;border:1px solid var(--border);border-radius:9px;overflow:hidden;transition:box-shadow .18s,border-color .18s}.cluster-card:hover{box-shadow:0 6px 24px #42336008;border-color:#cfc6df}.card-top{padding:21px 22px 15px;display:flex;align-items:center;gap:12px}.group-number{font-family:Georgia,serif;font-size:23px;color:#d1c8e2;min-width:29px}.card-top h2{font-size:15px;font-weight:550;letter-spacing:-.25px;line-height:1.4;margin:0}.card-top .badge{margin-left:auto;white-space:nowrap}.badge{font-size:8px;text-transform:uppercase;letter-spacing:.7px;background:#f4f1f9;color:#9382b1;padding:4px 7px;border-radius:3px}.meaning-sides{display:grid;grid-template-columns:1fr 1fr;padding:0 22px 19px;gap:20px}.meaning-sides.single{grid-template-columns:1fr}.meaning-side+ .meaning-side{border-left:1px solid #eeecf2;padding-left:18px}.side-heading{font-size:9px;letter-spacing:1px;text-transform:uppercase;color:var(--green);margin:0 0 10px;font-weight:600;display:flex;gap:6px;align-items:center}.side-heading:before{content:'';width:5px;height:5px;border-radius:50%;background:#9ebeb1;flex-shrink:0}.meaning-side:nth-child(2) .side-heading{color:var(--pink)}.meaning-side:nth-child(2) .side-heading:before{background:#cca6a9}.word-chip{border:0;border-radius:4px;background:#f2f6f3;color:#557767;padding:4px 8px;font-size:11px;margin:0 5px 6px 0;line-height:1.4;transition:background .15s}.word-chip:hover{background:#deeadf}.meaning-side:nth-child(2) .word-chip{background:#faf1f0;color:#a06a6e}.meaning-side:nth-child(2) .word-chip:hover{background:#f0dfdd}.card-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #efedf2;padding:11px 22px;background:#fdfcfefa}.card-bottom span{font-size:9px;color:#a39baa}.card-bottom button{font-size:10px;color:var(--purple);border:0;background:none;padding:0}.cluster-note{font-size:11px;color:#8b8295;padding:0 22px 17px;margin:0;line-height:1.7}.study-banner{background:#eeeaf4;padding:22px 27px;border-radius:8px;display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:28px}.study-banner h3{font-family:Georgia,serif;font-weight:400;font-size:20px;margin:0 0 3px}.study-banner p{font-size:11px;color:#8a8099;margin:0}.btn{border:1px solid var(--border);border-radius:6px;background:white;padding:10px 18px;font-size:12px;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn.primary{background:var(--purple);border-color:var(--purple);color:white}.btn.primary:hover{background:#57468f}.btn.ghost{background:transparent;color:var(--purple);border-color:#d8d1e5}.btn.small{padding:7px 12px;font-size:11px}.pagination{display:flex;justify-content:center;align-items:center;gap:16px;margin:26px 0 0;font-size:12px;color:var(--muted)}footer{max-width:1510px;margin:auto;border-top:1px solid var(--border);padding:20px 48px;color:#a7a2ad;font-size:10px;display:flex;justify-content:space-between;gap:10px}.word-list{background:white;border:1px solid var(--border);border-radius:8px;overflow:hidden}.word-row{display:flex;align-items:center;gap:18px;padding:17px 22px;border-bottom:1px solid #f0eef3}.word-row:last-child{border:0}.word-row .word-open{width:155px;flex-shrink:0;border:0;padding:0;background:none;text-align:left;font-family:Georgia,serif;font-size:21px;color:#514668}.word-row .definition{font-size:12px;color:#88818e;flex:1}.word-row .pos{font-size:9px;letter-spacing:1px;color:#aaa2b1;margin-right:7px}.save-button{border:0;background:none;font-size:23px;line-height:1;color:#b2a5c4;padding:4px 6px}.save-button.saved{color:var(--purple)}.empty{padding:50px 25px;text-align:center;background:white;border:1px dashed #d9d1e3;border-radius:8px;color:#89818f}.empty h2{font:30px Georgia,serif;color:#504460}.practice-config{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:22px 0}.practice-config label{font-size:12px;color:var(--muted)}.practice-config select{flex:1;min-width:180px;max-width:420px}.practice-stage{max-width:760px;margin:35px auto}.stage-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:15px}.flashcard{display:flex;align-items:center;justify-content:center;flex-direction:column;width:100%;min-height:310px;border:1px solid #dcd4e8;background:#fff;border-radius:13px;box-shadow:0 10px 35px #6755a608;padding:40px;text-align:center}.flashcard .big-word{font-family:'Libre Caslon Display',Georgia,serif;font-size:56px;line-height:1.1;letter-spacing:-1px}.flashcard .flash-definition{font-family:Georgia,serif;font-size:25px;line-height:1.5;max-width:550px}.flashcard .flash-zh{font-size:14px;color:#91829e;margin-top:18px}.flash-hint{margin-top:30px;font-size:10px;color:#b0a4bd;letter-spacing:.3px}.flash-actions{display:flex;gap:10px;align-items:center;justify-content:center;margin-top:20px;flex-wrap:wrap}.shortcut{text-align:center;font-size:10px;color:#a299ae;margin-top:18px}.quiz-progress{height:4px;background:#e8e2f0;border-radius:5px;overflow:hidden;margin:10px 0 30px}.quiz-progress span{display:block;height:100%;background:var(--purple)}.quiz-question{font-family:Georgia,serif;font-weight:400;font-size:28px;line-height:1.5;margin:10px 0 26px}.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:12px}.quiz-option{border:1px solid var(--border);border-radius:7px;padding:17px 18px;text-align:left;background:white;display:flex;align-items:center;gap:14px;font-size:16px}.quiz-option .key{border:1px solid #e7e0ed;border-radius:4px;width:25px;height:25px;font-size:11px;display:grid;place-items:center;color:#9b8daa}.quiz-option:hover:not(:disabled){border-color:var(--purple)}.quiz-option.correct{background:#edf6ef;border-color:#82aa8a;color:#376747}.quiz-option.incorrect{background:#fcf0f0;border-color:#cfa3a8;color:#9c555e}.quiz-option:disabled{opacity:1}.feedback{padding:18px 0;font-size:13px;min-height:70px}.feedback.correct{color:#477264}.feedback.incorrect{color:#a46369}.score{text-align:center;padding:35px;background:white;border-radius:12px;border:1px solid var(--border)}.score-number{font:76px 'Libre Caslon Display',Georgia,serif;color:var(--purple);line-height:1.2}.score h2{font:30px Georgia,serif}.score p{color:var(--muted)}.score .btn{margin:10px 4px}.session-word{display:flex;gap:14px;align-items:center;padding:9px 0;border-bottom:1px solid var(--border);font-size:12px;text-align:left}.session-word strong{min-width:95px}.session-word span{color:var(--muted)}.review-list{margin-top:22px}.review-list h3{font-size:12px;font-weight:500;color:var(--muted)}dialog{border:1px solid var(--border);border-radius:14px;max-width:610px;width:calc(100% - 32px);padding:38px;max-height:85vh;overflow:auto;color:var(--ink);box-shadow:0 30px 100px #27203522}dialog::backdrop{background:#30294255;backdrop-filter:blur(4px)}.dialog-close{position:absolute;top:13px;right:15px;border:0;background:none;color:#998ba7;font-size:25px;padding:3px 8px}.dialog-word{font:55px 'Libre Caslon Display',Georgia,serif;margin:5px 0 20px;line-height:1.15}.dialog-sense{border-top:1px solid var(--border);padding:18px 0}.dialog-sense p{font-size:17px;margin:5px 0}.dialog-sense .zh{font-size:13px;color:#a191aa}.source-ref{font-size:10px;color:#a196ac;display:block;margin-top:8px}.dialog-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.related-groups{margin-top:15px}.related-groups button{margin:4px 4px 0 0;font-size:10px;border:1px solid var(--border);background:#f8f5fc;border-radius:4px;padding:6px 9px;color:var(--purple)}#about-dialog h2{font:36px Georgia,serif;line-height:1.2}#about-dialog p:not(.eyebrow){font-size:13px;color:#80758a;line-height:1.9}#toast{position:fixed;bottom:25px;left:calc(50% + 124px);transform:translate(-50%,15px);background:#423553;color:#fff;padding:11px 20px;border-radius:6px;font-size:12px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:10}#toast.show{opacity:1;transform:translate(-50%,0)}.group-detail{border:1px solid var(--border);border-radius:10px;background:white;padding:28px}.group-detail .meaning-sides{padding:15px 0 20px}.group-detail .word-chip{font-size:14px;padding:7px 12px}.group-detail .cluster-note{font-size:13px;padding:20px 0;border-top:1px solid var(--border)}.group-back{font-size:11px;color:var(--purple);margin-bottom:20px;display:inline-block}.section-subtitle{font-size:12px;color:var(--muted)}
@media(min-width:1550px){main{padding-top:55px}.hero{margin-bottom:38px}.cluster-card .card-top{padding-top:25px}.meaning-sides{padding-bottom:24px}}
@media(max-width:1150px){.sidebar{width:210px;padding:28px 15px}.brand{font-size:17px}.workspace{margin-left:210px}main{padding:35px 28px}.topbar{padding:0 28px}.hero h1{font-size:45px}.card-top{padding:18px 16px 14px}.meaning-sides{padding:0 16px 14px;gap:10px}.meaning-side+ .meaning-side{padding-left:10px}.card-bottom{padding:11px 16px}.cluster-note{padding:0 16px 15px}.badge{font-size:7px}footer{padding:20px 28px}#toast{left:calc(50% + 105px)}}
@media(max-width:900px){.hero-art{display:none}.cluster-grid{grid-template-columns:1fr}.hero h1{font-size:44px}.word-row .word-open{width:120px}.breadcrumb{font-size:8px}.daily-button{font-size:10px;padding:7px 10px}.stats-row{gap:18px}.stat{font-size:10px}.card-top h2{font-size:17px}}
@media(max-width:650px){.sidebar{position:static;width:100%;padding:18px 18px 0;border-right:0;border-bottom:1px solid var(--border)}.brand{font-size:19px}.side-label,.sidebar-bottom{display:none}nav{display:flex;gap:5px;overflow:auto;margin-top:17px;padding-bottom:12px}nav a{padding:8px 10px;font-size:10px;white-space:nowrap;gap:5px}nav a>span{font-size:15px;width:16px}nav a small{display:none}.workspace{margin-left:0}.topbar{height:52px;padding:0 20px}.breadcrumb{font-size:7px;letter-spacing:.8px}.breadcrumb span{margin:0 7px}.daily-button{font-size:9px;padding:6px 8px}main{padding:29px 20px}.hero{margin-bottom:25px}.hero h1{font-size:41px}.hero p:not(.eyebrow){font-size:12px}.stats-row{gap:14px;flex-wrap:wrap;padding-bottom:18px;margin-bottom:20px}.stat{gap:5px;font-size:9px}.stat b{font-size:12px}.toolbar{gap:8px}.search-wrap{flex-basis:100%}.view-tabs{flex:1}.view-tabs button{flex:1}.filter-row{gap:6px}.filter-chip{font-size:9px;padding:5px 10px}.card-top h2{font-size:15px}.meaning-sides{gap:13px;padding-bottom:18px}.meaning-side+ .meaning-side{padding-left:13px}.word-chip{font-size:11px;margin-right:4px}.cluster-note{font-size:10px}.study-banner{padding:20px;align-items:flex-start;flex-direction:column;gap:13px}.study-banner h3{font-size:20px}.word-row{padding:15px;gap:12px;flex-wrap:wrap}.word-row .word-open{width:auto;flex:1;font-size:23px}.word-row .definition{order:3;flex-basis:100%}.word-row .save-button{order:2}.flashcard{min-height:280px;padding:25px}.flashcard .big-word{font-size:43px}.flashcard .flash-definition{font-size:22px}.quiz-options{grid-template-columns:1fr}.quiz-question{font-size:24px}.quiz-option{padding:13px 16px}.practice-stage{margin:25px auto}.flash-actions .btn{padding:10px 12px;font-size:11px}.score{padding:25px 20px}dialog{padding:30px 24px}.dialog-word{font-size:45px}.group-detail{padding:20px}.group-detail .meaning-sides{gap:14px}.group-detail .word-chip{font-size:12px;padding:5px 8px}.group-detail .cluster-note{font-size:12px}.section-subtitle{font-size:11px}footer{padding:18px 20px;font-size:9px;flex-direction:column;gap:4px}#toast{left:50%;width:max-content;max-width:calc(100% - 30px);text-align:center}#about-dialog h2{font-size:30px}.practice-config select{max-width:100%;width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}