:root{color-scheme:dark;--bg:#111f22;--side:#0c171a;--panel:#1a2c30;--raised:#21363a;--line:#30464a;--text:#edf2ef;--muted:#a4b6b5;--accent:#c4db8b;--accent-text:#1a2816;--error:#f0a69e;--font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 var(--font);letter-spacing:.015em}button,input,select{font:inherit}button,a,input,select{ -webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:default;opacity:.48}button,input,select{border-radius:7px}button{border:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:4px}h1,h2,h3,p{margin:0}h1{font-size:30px;font-weight:600;line-height:1.4;letter-spacing:.03em}h2{font-size:20px;font-weight:600}h3{font-size:17px;font-weight:500}.muted{color:var(--muted)}.small-label{font-size:12px;color:var(--muted);letter-spacing:.06em}.sidebar{width:238px;position:fixed;inset:0 auto 0 0;background:var(--side);padding:32px 22px 24px;display:flex;flex-direction:column;z-index:10}.brand{display:block;font-size:23px;line-height:1.4;font-weight:600;letter-spacing:.025em;padding:0 8px}.brand span{display:block;color:var(--muted);font-size:13px;font-weight:400;margin-top:8px}.sidebar nav{display:grid;gap:8px;margin-top:40px}.sidebar nav a{display:flex;gap:14px;align-items:center;padding:13px 14px;border-radius:7px;color:#c4d0ce}.sidebar nav a:hover{background:#16272a}.sidebar nav a.active{background:#263b3b;color:var(--accent)}.nav-icon{width:20px;display:flex}.nav-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.nav-count{margin-left:auto;font-size:12px}.sidebar-bottom{margin-top:auto;padding:26px 8px 0;font-size:12px;color:#9bb0ad}.sidebar-bottom p+p{margin-top:13px}.sidebar-bottom #save-status{display:block;margin-top:22px;font-size:11px;color:#a9bf92}main{margin-left:238px;padding:38px 46px 40px;max-width:1600px;min-height:100vh}.page-header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.page-header .muted{font-size:13px}.primary{padding:12px 23px;background:var(--accent);color:var(--accent-text);font-weight:600;min-height:45px}.primary:hover{background:#d1e5a2}.secondary{padding:10px 18px;background:var(--raised);border:1px solid var(--line);color:var(--text);min-height:43px}.secondary:hover{background:#2a4144}.text-button{color:var(--muted);background:transparent;padding:9px 0;text-align:left}.text-button:hover{color:var(--text)}.button-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.continue-panel{padding:28px 30px;background:var(--raised);border-radius:10px;display:flex;justify-content:space-between;gap:40px;align-items:center;margin-bottom:34px}.continue-info{flex:1;max-width:610px}.continue-info h2{font-size:25px;margin-bottom:5px}.continue-info .small-label{font-size:13px}.continue-info .progress-track{margin:17px 0 8px}.continue-action{min-width:180px;text-align:right}.continue-action .primary{margin-top:15px;min-width:172px}.today{font-size:14px}.today strong{color:var(--accent);font-size:21px;font-weight:500;margin:0 5px}.progress-track{height:6px;background:#3b5153;border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--accent);border-radius:4px;transition:width .2s}.section-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.section-heading span{font-size:12px;color:var(--muted)}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.topic-tile{padding:20px 18px;background:var(--panel);color:var(--text);border:1px solid transparent;text-align:left;display:flex;gap:15px;align-items:center;min-height:91px}.topic-tile:not(:disabled):hover{border-color:#71845b;background:#22383b}.topic-tile:disabled{opacity:.64}.topic-number{font-size:15px;color:var(--muted);font-variant-numeric:tabular-nums;width:24px}.topic-details{flex:1;min-width:0}.topic-top{display:flex;gap:9px;justify-content:space-between;align-items:center;margin-bottom:14px}.topic-top b{font-weight:500;font-size:15px}.topic-top span{font-size:11px;color:var(--muted);white-space:nowrap}.topic-tile .progress-track{height:4px}.bottom-note{margin-top:25px;display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.group-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.group-card{background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:26px}.group-card h2{margin:9px 0 5px}.group-card .progress-track{margin:23px 0 10px}.group-card .button-row{margin-top:24px}.group-card.inactive{opacity:.5}.practice-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.practice-top h1{font-size:23px}.practice-top .small-label{font-size:13px}.practice-progress{margin-bottom:34px}.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:26px;align-items:start}.practice-card{padding:38px 40px;background:var(--panel);border-radius:12px;min-height:510px}.listen-row{display:flex;align-items:center;justify-content:space-between;gap:20px}.play-button{background:var(--accent);color:var(--accent-text);font-weight:600;padding:13px 26px;font-size:16px;min-width:150px}.speed-control{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:12px}.speed-control select,select{background:var(--raised);color:var(--text);border:1px solid var(--line);padding:7px 10px}.audio-status{font-size:12px;color:var(--muted);margin-top:11px;min-height:21px}.answer-form{margin-top:38px}.answer-form label{display:block;color:var(--muted);font-size:13px;margin-bottom:10px}.answer-input{width:100%;background:#122124;border:1px solid #52686a;color:var(--text);font-size:24px;letter-spacing:.025em;padding:15px 18px;line-height:1.45;outline:none}.answer-input:focus{border-color:var(--accent)}.answer-input::placeholder{color:#718887;font-size:16px;letter-spacing:0}.answer-input[readonly]{color:var(--muted)}.answer-tools{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:18px}.hint{margin-top:18px;padding:12px 15px;background:#263b3d;color:#d9e3dd;border-radius:6px;font-size:14px}.feedback{margin-top:27px;border-top:1px solid var(--line);padding-top:22px}.result-label{font-size:13px;color:var(--accent);margin-bottom:7px}.feedback.wrong .result-label{color:var(--error)}.answer-word{font-size:27px;font-weight:500;line-height:1.5;overflow-wrap:anywhere}.answer-meaning{margin-top:8px;color:#d5dfdb}.ipa{color:var(--muted);font-size:13px;margin-top:9px;line-height:1.9;letter-spacing:0}.ipa span{display:block;font-family:var(--font)}.source{color:#7e9794;font-size:11px;margin-top:10px}.correction-form{margin-top:19px}.correction-form label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}.correction-form input{background:#122124;border:1px solid var(--line);padding:11px 13px;color:var(--text);width:100%;font-size:18px}.correction-form button{margin-top:13px}.feedback-actions{margin-top:22px}.practice-aside{padding:22px 21px;border:1px solid var(--line);border-radius:9px}.practice-aside h2{font-size:15px;margin-bottom:20px}.stat-row{display:flex;justify-content:space-between;margin-top:12px;color:var(--muted);font-size:13px}.stat-row strong{color:var(--text);font-size:15px;font-weight:500}.aside-note{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.shortcut-note{color:#859d99;font-size:12px;margin-top:20px}.answer-diff{margin-top:8px;color:var(--muted);font-size:15px;overflow-wrap:anywhere}.answer-diff mark{background:#613e37;color:#ffd5ca;border-radius:3px;padding:1px 2px}.message-error{color:var(--error);font-size:13px;margin-top:10px}.summary-panel{padding:32px;background:var(--panel);border-radius:10px}.summary-panel h2{font-size:25px}.summary-stats{display:flex;gap:50px;margin:25px 0 30px}.summary-stats strong{display:block;font-size:34px;font-weight:500;color:var(--accent)}.summary-stats span{color:var(--muted);font-size:13px}.summary-note{margin-top:22px;color:var(--muted);font-size:13px}.table-wrap{overflow:auto;margin-top:23px;border:1px solid var(--line);border-radius:8px}table{border-collapse:collapse;width:100%;text-align:left;white-space:nowrap;font-size:13px}th{font-weight:500;background:var(--raised);color:var(--muted)}th,td{padding:14px 18px;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:0}td.word{font-size:15px}td.error-input{color:var(--error)}.empty{padding:60px 25px;background:var(--panel);border-radius:10px;color:var(--muted);text-align:center}.empty h2{color:var(--text);margin-bottom:9px}.filter-bar{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.filter-bar input{background:var(--panel);border:1px solid var(--line);color:var(--text);padding:8px 12px;min-height:42px}.guide-content{max-width:830px;background:var(--panel);border-radius:10px;padding:32px}.guide-content section+section{margin-top:28px}.guide-content h2{font-size:17px;margin-bottom:10px}.guide-content p{color:var(--muted);margin:8px 0}.backup-panels{display:grid;grid-template-columns:1fr 1fr;gap:20px}.backup-card{padding:30px;background:var(--panel);border:1px solid var(--line);border-radius:10px}.backup-card p{color:var(--muted);margin:12px 0 24px;font-size:14px}.backup-card small{display:block;color:var(--muted);margin-top:17px}.backup-card input[type=file]{width:100%;color:var(--muted);font-size:12px;margin-bottom:14px}.record-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:17px;margin-bottom:28px}.record-stat{padding:23px;background:var(--panel);border-radius:8px}.record-stat strong{font-size:29px;font-weight:500;display:block;color:var(--accent)}.record-stat span{color:var(--muted);font-size:13px}dialog{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:12px;max-width:490px;padding:30px}dialog::backdrop{background:#0009}dialog p{margin:15px 0}dialog .button-row{justify-content:flex-end;margin-top:24px}#toast{position:fixed;bottom:28px;left:calc(50% + 119px);transform:translateX(-50%);background:#e2ecd4;color:#213027;padding:11px 20px;border-radius:7px;font-size:13px;z-index:50;opacity:0;pointer-events:none;transition:opacity .15s;max-width:80vw}#toast.visible{opacity:1}.loading{padding:80px 0;color:var(--muted)}
@media(min-width:1500px){main{padding-left:60px;padding-right:60px}.topic-tile{min-height:102px}}@media(max-width:1150px){.sidebar{width:210px;padding:28px 16px}.brand{font-size:20px}main{margin-left:210px;padding:30px 28px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.practice-layout{grid-template-columns:minmax(0,1fr)}.practice-aside{display:none}.practice-card{max-width:800px}.continue-panel{gap:22px;padding:25px}.topic-tile{padding:17px}#toast{left:calc(50% + 105px)}}@media(max-width:720px){.sidebar{position:static;width:auto;padding:18px 20px 0;display:block}.brand{font-size:20px}.brand span{font-size:11px;display:inline-block;margin:0 0 0 15px}.sidebar nav{margin-top:18px;display:flex;gap:5px;overflow:auto;padding-bottom:12px}.sidebar nav a{padding:8px 10px;white-space:nowrap;font-size:12px;gap:0}.nav-icon{display:none}.nav-count{margin-left:5px}.sidebar-bottom{display:none}main{margin:0;padding:25px 20px 30px;min-height:calc(100vh - 130px)}h1{font-size:25px}.page-header{margin-bottom:22px}.page-header .muted{display:none}.continue-panel{padding:22px;display:block;margin-bottom:27px}.continue-info h2{font-size:22px}.continue-action{text-align:left;display:flex;justify-content:space-between;align-items:center;margin-top:19px;min-width:0}.continue-action .primary{margin:0;min-width:0;padding:10px 17px}.today{font-size:12px}.topic-grid{gap:10px}.topic-tile{padding:15px 12px;gap:9px;min-height:98px}.topic-number{font-size:12px;width:18px}.topic-top{display:block;margin-bottom:9px}.topic-top b{font-size:14px}.topic-top span{display:block;font-size:10px;margin-top:2px}.bottom-note{display:block}.bottom-note span{display:block;margin-top:8px}.group-grid{grid-template-columns:1fr}.practice-top h1{font-size:21px}.practice-progress{margin-bottom:20px}.practice-card{padding:25px 21px;min-height:460px}.listen-row{gap:12px}.play-button{padding:12px 17px;min-width:125px;font-size:15px}.speed-control{gap:5px;font-size:11px}.speed-control select{padding:6px}.answer-form{margin-top:27px}.answer-input{font-size:21px;padding:15px 13px}.answer-tools{align-items:flex-start}.answer-tools .primary{padding:10px 15px}.answer-word{font-size:24px}.shortcut-note{font-size:10px}.summary-stats{gap:25px;flex-wrap:wrap}.summary-stats strong{font-size:28px}.summary-panel{padding:25px}.backup-panels{grid-template-columns:1fr}.record-stats{gap:8px}.record-stat{padding:17px 12px}.record-stat strong{font-size:23px}.record-stat span{font-size:11px}.guide-content{padding:25px}.filter-bar .button-row{gap:8px}.filter-bar button{font-size:12px;padding:9px 12px}#toast{left:50%;bottom:20px;width:max-content}.table-wrap{margin-top:18px}}

.sidebar{overflow-y:auto}.brand span{font-size:12px;letter-spacing:0}.sidebar nav{margin-top:30px}.supplement-empty{padding:75px 25px}.update-label{display:inline-block;padding:4px 13px;background:var(--raised);color:var(--accent);border-radius:5px;font-size:12px;margin-bottom:22px}.supplement-empty p{max-width:470px;margin:0 auto}.supplement-empty h2{font-size:21px;font-weight:500;margin-bottom:14px}@media(max-width:720px){.brand span{display:block;margin:7px 0 0;font-size:11px}.sidebar nav{margin-top:18px}.supplement-empty{padding:55px 24px}}

.page-explanation{color:var(--muted);margin:-10px 0 24px;font-size:14px}.view-tabs{display:flex;gap:10px}.error-selects{display:flex;gap:16px;flex-wrap:wrap}.error-selects label,.date-range label{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px}.date-range{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:18px}.date-range[hidden]{display:none}.date-range input{background:var(--raised);color:var(--text);border:1px solid var(--line);padding:7px 10px}.record-empty{margin-top:22px}#copy-dialog{width:min(800px,calc(100vw - 32px));max-width:800px}#copy-content{display:block;width:100%;height:260px;resize:vertical;background:var(--bg);color:var(--text);border:1px solid var(--line);padding:14px;font:13px/1.7 var(--font);white-space:pre;overflow:auto}#copy-dialog p{font-size:13px;color:var(--muted)}@media(max-width:720px){.page-explanation{font-size:13px}.error-selects{width:100%}.error-selects label{flex:1;min-width:130px;display:block}.error-selects select{display:block;width:100%;margin-top:6px}.date-range label{display:block}.date-range input{display:block;margin-top:6px}.view-tabs button{font-size:12px;padding:9px 13px}.record-stats .record-stat strong{font-size:21px}}

.record-scope{margin-bottom:20px}.record-scope label{color:var(--muted);font-size:13px}.record-scope select{margin-left:8px}.record-stat small{display:block;color:var(--muted);font-size:12px;margin-top:9px;line-height:1.6}.record-stats{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:720px){.record-stats{grid-template-columns:1fr}.record-stat{padding:18px 20px}.record-stat small{font-size:12px}}

@media(max-width:720px){.page-header{flex-wrap:wrap;gap:8px}.page-header .muted{display:block}.section-heading{flex-wrap:wrap;gap:8px}}