:root{--blue:#1759ce;--blue-hover:#1049b3;--blue-soft:#edf3ff;--ink:#172642;--muted:#66758e;--line:#dce4ef;--canvas:#f4f7fc;--white:#fff;--radius:14px;--shadow:0 3px 14px #183c7810;font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK JP",sans-serif;color:var(--ink);background:var(--canvas);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;font-size:18px;line-height:1.65}a{color:var(--blue);text-decoration:none}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button,input,textarea,select{border-radius:9px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #7eb0ff;outline-offset:3px}input,textarea,select{min-width:0;width:100%;border:1px solid #bfcde0;background:white;color:var(--ink);padding:11px 13px}textarea{line-height:1.7;resize:vertical;tab-size:16}label{display:grid;gap:8px;font-weight:600;font-size:18px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-weight:600;font-size:18px;margin-bottom:12px}h1,h2,p{margin:0}h1{font-size:34px;font-weight:750;letter-spacing:-.025em;line-height:1.35}h2{font-size:24px;line-height:1.5}form{margin:0}small,.small{font-size:16px}strong{font-weight:700}[hidden]{display:none!important}.muted{color:var(--muted)}.numeric{font-variant-numeric:tabular-nums}.eyebrow{display:block;color:var(--muted);font-size:16px;font-weight:600;letter-spacing:.035em;margin-bottom:6px}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.memory-shell{width:min(1180px,calc(100% - 48px));margin:34px auto 64px}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:10px 19px;font-size:18px;font-weight:650;border:1px solid transparent;white-space:nowrap;border-radius:9px;line-height:1.5}.primary{background:var(--blue);color:white;border-color:var(--blue)}.primary:hover:not(:disabled){background:var(--blue-hover)}.secondary{background:white;color:var(--blue);border-color:#bfd0ed}.secondary:hover:not(:disabled){background:var(--blue-soft)}.quiet{background:var(--blue-soft);border-color:transparent;color:var(--blue)}.back-link{display:inline-block;font-size:18px;margin-bottom:10px}.notice{padding:13px 16px;margin:0 0 18px;border-radius:9px;border:1px solid #c6d9ff;background:var(--blue-soft);font-size:18px}.notice-error{background:#fff1f1;border-color:#f3c3c3;color:#a52d3d}.notice-success{background:#edf8f2;border-color:#baddc9;color:#206542}.panel{padding:24px;background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}.panel-heading p{font-size:18px;color:var(--muted);margin-top:5px}.empty-state{text-align:center;padding:70px 24px;background:white;border:1px solid var(--line);border-radius:var(--radius)}.empty-state h2{font-size:27px}.empty-state p{color:var(--muted);margin:10px auto 24px;max-width:540px;font-size:18px}.empty-state.compact{padding:45px 20px;border:0}.empty-mark{font-size:39px;font-weight:600;background:var(--blue-soft);color:var(--blue);border-radius:16px;width:70px;height:70px;display:grid;place-items:center;margin:0 auto 20px}.status{display:inline-flex;align-items:center;font-size:16px;font-weight:600;line-height:1.4;padding:5px 9px;border-radius:6px;white-space:nowrap;background:#eaf0f8;color:#687991}.status.open,.status.know{background:#eaf2ff;color:#1759ce}.status.open:before{content:"";width:5px;height:5px;background:currentColor;border-radius:50%;margin-right:5px}.status.unsure{color:#945b0d;background:#fff2db}.status.unknown{color:#ab3a4c;background:#ffedf0}progress{width:100%;height:5px;border:0;border-radius:8px;display:block;overflow:hidden;background:#e8eef8;accent-color:var(--blue)}progress::-webkit-progress-bar{background:#e8eef8;border-radius:8px}progress::-webkit-progress-value{background:var(--blue);border-radius:8px}progress::-moz-progress-bar{background:var(--blue);border-radius:8px}
.task-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.task-card{display:flex;flex-direction:column;padding:25px;background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.task-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:15px}.task-card .task-top>.status,.task-card .task-top>.small{flex-shrink:0;white-space:nowrap}.task-card h2{font-size:26px;overflow-wrap:anywhere;margin-bottom:0}.task-summary{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.task-summary progress{height:4px;width:100%}.task-progress{display:flex;flex:1;min-width:0;flex-wrap:wrap;align-items:center;justify-content:center;gap:2px 8px;color:var(--muted);font-size:16px;line-height:1.5}.task-progress>span{white-space:nowrap}.task-progress strong{color:var(--ink);margin-left:3px;font-size:18px}.task-actions{display:flex;justify-content:flex-end;flex-wrap:wrap;gap:10px;margin-top:auto;padding-top:18px}.task-actions form{max-width:100%}.memory-button{width:auto;max-width:100%;height:46px;display:flex;align-items:center;justify-content:center;text-align:center;border:1px solid #bfd0ed;font-size:20px;font-weight:700;line-height:1.4;padding:8px 10px}.memory-button-label{display:block;white-space:nowrap;line-height:1.4}.memory-button.primary{border-color:var(--blue)}.memory-button.secondary{background:#bed9fb;border-color:#bed9fb;color:#164b90}.memory-button.secondary:hover:not(:disabled){background:#aacdf8;border-color:#aacdf8}
.study-page{background:#f2f6fd}.study-shell{max-width:780px;margin-top:24px}.study-heading{margin-bottom:13px}.study-heading h1{font-size:22px;line-height:1.5;overflow-wrap:anywhere;margin-bottom:8px}.study-heading>div{display:flex;justify-content:space-between;color:var(--muted);font-size:16px}.study-card{margin-top:22px;background:white;border:1px solid var(--line);border-radius:20px;box-shadow:0 8px 30px #2449810a;overflow:hidden;display:flex;flex-direction:column;min-height:365px}.prompt-side{flex:1;min-height:225px;padding:34px 35px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;text-align:center}.card-note{max-width:100%;padding:6px 12px;border-radius:6px;background:#e8eff9;color:#365577;font-size:18px;font-weight:700;line-height:1.6;white-space:pre-wrap;overflow-wrap:anywhere}#card-prompt{font-size:clamp(40px,5.5vw,56px);font-weight:700;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%;letter-spacing:.025em}.answer-side{border-top:1px solid #e7edf6;background:#fbfcff;min-height:140px;padding:21px 30px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}.answer-side p{font-size:clamp(32px,4.5vw,42px);font-weight:700;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%;color:#981f32}#answer-hidden{display:flex;flex-direction:column;align-items:center;gap:10px;padding:3px 0}#answer-hidden span{height:8px;width:130px;background:#e8eef7;border-radius:10px}#answer-hidden span+span{width:85px}.study-action-wrap{margin-top:21px}.rating-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.rating-button{min-height:84px;display:flex;align-items:center;justify-content:center;gap:13px;border:1px solid transparent;border-radius:12px;font-size:25px;font-weight:700;touch-action:manipulation;transition:background .12s,transform .12s}.rating-button:active:not(:disabled){transform:scale(.98)}.rating-button.know{background:#21834b;color:white;border-color:#21834b}.rating-button.know:hover:not(:disabled){background:#196b3c;border-color:#196b3c}.rating-button.unsure{background:#6b7280;color:white;border-color:#6b7280}.rating-button.unsure:hover:not(:disabled){background:#565e6b;border-color:#565e6b}.rating-button.unknown{background:#c83f4d;color:white;border-color:#c83f4d}.rating-button.unknown:hover:not(:disabled){background:#ad303d;border-color:#ad303d}.next-button{width:100%;min-height:84px;font-size:25px;border-radius:12px}.save-row{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;min-height:30px;padding-top:10px;font-size:16px;color:var(--muted)}.study-error{margin-top:18px}.round-complete{text-align:center;background:white;border:1px solid var(--line);border-radius:20px;margin-top:24px;padding:42px 30px}.complete-mark{background:var(--blue-soft);color:var(--blue);width:66px;height:66px;font-size:36px;display:grid;place-items:center;border-radius:50%;margin:0 auto 20px}.round-complete h2{font-size:32px}.round-complete p{font-size:18px;color:var(--muted);margin-top:10px}.complete-counts{display:grid;grid-template-columns:repeat(3,1fr);margin:30px auto;max-width:460px}.complete-counts>div{display:grid;gap:4px;border-right:1px solid var(--line)}.complete-counts>div:last-child{border:0}.complete-counts strong{font-size:36px;font-variant-numeric:tabular-nums}.complete-counts span{font-size:18px;color:var(--muted)}.complete-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.admin-task-list{display:grid;gap:14px}.admin-task-card{display:grid;grid-template-columns:minmax(240px,1fr) auto auto;align-items:center;gap:30px;padding:23px 25px;background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.admin-task-main .task-top{justify-content:flex-start;margin-bottom:8px}.admin-task-main h2{font-size:23px;overflow-wrap:anywhere}.class-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.class-chips span{font-size:16px;padding:3px 8px;border-radius:5px;background:#f0f4f9;color:var(--muted)}.admin-task-numbers{display:flex;gap:25px;text-align:center}.admin-task-numbers>div{display:grid;gap:3px}.admin-task-numbers strong{font-size:28px;line-height:1.3}.admin-task-numbers small{font-size:18px;font-weight:400;color:var(--muted)}.admin-task-numbers span{font-size:16px;color:var(--muted)}.admin-task-actions{display:flex;gap:8px}.admin-task-actions .button{padding:8px 12px}.editor-form{display:grid;gap:20px}.editor-settings{display:grid;gap:23px}.editor-settings>label:first-child{max-width:750px}.class-picker{display:flex;flex-wrap:wrap;gap:9px}.class-picker label{display:flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:8px;padding:9px 12px;font-size:18px;font-weight:500}.class-picker label:has(input:checked){border-color:#7da7ed;background:var(--blue-soft);color:var(--blue)}input[type=checkbox]{width:17px;height:17px;padding:0;accent-color:var(--blue);flex-shrink:0}.class-picker small{margin-left:3px;color:var(--muted);font-size:16px}.check-label{display:flex;gap:10px;align-items:flex-start}.check-label small{display:block;color:var(--muted);font-weight:400;font-size:16px;margin-top:4px}.format-guide{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));max-width:650px;background:var(--blue-soft);padding:9px 15px;color:#49648d;font-size:16px;border-radius:8px;margin-bottom:12px}.editor-footer{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:16px}.publish-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 22px;background:white;border:1px solid var(--line);border-radius:var(--radius)}.count-pill{display:inline-block;vertical-align:middle;margin-left:7px;background:var(--blue-soft);color:var(--blue);font-size:16px;font-weight:500;padding:3px 8px;border-radius:6px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:18px}th{color:var(--muted);font-size:16px;font-weight:600;background:#f7f9fc;white-space:nowrap}td,th{padding:14px 16px;border-bottom:1px solid #e8edf5;vertical-align:top}td{overflow-wrap:anywhere;min-width:95px;max-width:360px;white-space:pre-wrap}td strong{font-weight:600}td small{display:block;color:var(--muted);font-size:16px;line-height:1.6;margin-top:4px}tbody tr:last-child td{border-bottom:0}.time-cell{white-space:nowrap}.preview-table{max-height:550px}.preview-table th{position:sticky;top:0}.filter-bar{display:grid;grid-template-columns:minmax(180px,1.4fr) minmax(140px,1fr) minmax(160px,1fr) auto;align-items:end;gap:15px;padding:20px;margin-bottom:20px}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.stat-grid>div{padding:20px 22px;background:white;border:1px solid var(--line);border-radius:12px;display:grid;gap:7px}.stat-grid span{color:var(--muted);font-size:16px}.stat-grid strong{font-size:32px;font-variant-numeric:tabular-nums}.stat-grid small{font-size:16px;font-weight:400;color:var(--muted)}.stats-help{margin-top:12px}.tabs{display:flex;gap:7px;margin:24px 0 15px;border-bottom:1px solid var(--line)}.tabs a{display:block;padding:12px 16px;color:var(--muted);font-size:18px;border-bottom:3px solid transparent;margin-bottom:-1px}.tabs a[aria-current=page]{color:var(--blue);font-weight:650;border-color:var(--blue)}.results-panel{padding:0;overflow:hidden}.number-accent{color:var(--blue);font-size:23px}.pagination{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding:17px 20px;border-top:1px solid var(--line);font-size:16px;color:var(--muted)}.pagination>div{display:flex;gap:10px}.login-panel{display:grid;grid-template-columns:1.1fr 1fr;background:white;border:1px solid var(--line);border-radius:20px;overflow:hidden;max-width:860px;margin:85px auto;box-shadow:0 8px 40px #1747870d}.login-heading{padding:54px 40px;background:#edf3ff;display:flex;flex-direction:column;justify-content:center}.login-heading h1{font-size:39px;line-height:1.5;margin:9px 0 18px}.login-heading p{font-size:18px;color:var(--muted)}.login-form{padding:45px 36px;display:grid;gap:20px}.login-form .button{font-size:18px;min-height:48px;margin-top:5px}
@media(min-width:900px) and (min-height:800px){.study-card{min-height:420px}.prompt-side{min-height:270px}.study-shell{margin-top:32px}}
@media(max-width:1050px){.admin-task-card{grid-template-columns:minmax(180px,1fr) auto;gap:20px}.admin-task-actions{grid-column:1/-1;justify-content:flex-end;padding-top:14px;border-top:1px solid var(--line)}}
@media(max-width:767px){.memory-shell{width:calc(100% - 32px);margin-top:23px;margin-bottom:35px}.page-heading{margin-bottom:20px;align-items:center}h1{font-size:29px}.page-heading>.muted{font-size:16px}.task-grid{grid-template-columns:1fr;gap:16px}.task-card{padding:20px}.task-card h2{font-size:25px;margin-bottom:0}.task-top{margin-bottom:13px}.study-shell{width:calc(100% - 28px);margin-top:18px}.study-heading h1{font-size:18px}.study-card{margin-top:18px;min-height:355px;border-radius:17px}.prompt-side{padding:25px 22px;min-height:220px;gap:15px}.answer-side{padding:18px 22px;min-height:135px}#card-prompt{font-size:44px}.study-action-wrap{position:sticky;bottom:0;padding:13px 0 max(8px,env(safe-area-inset-bottom));margin-top:6px;background:#f2f6fdf5;z-index:2}.rating-buttons{gap:9px}.rating-button{min-height:80px;gap:8px;font-size:23px;border-radius:11px}.next-button{min-height:80px}.keyboard-hint{display:none}.save-row{justify-content:center;font-size:16px}.round-complete{padding:32px 18px}.round-complete h2{font-size:29px}.admin-task-card{padding:19px;gap:17px;grid-template-columns:minmax(0,1fr)}.admin-task-numbers{justify-content:flex-start;text-align:left;gap:35px}.admin-task-actions{justify-content:stretch;gap:9px}.admin-task-actions>*{flex:1}.admin-task-actions form .button{width:100%}.panel{padding:19px}.panel-heading{align-items:flex-start;gap:10px}.panel-heading h2{font-size:23px}.panel-heading .button{font-size:16px;padding:8px 10px}.editor-footer{align-items:flex-start;flex-direction:column;gap:12px}.editor-footer .button{align-self:flex-end}.publish-bar{padding:17px;gap:10px;align-items:flex-end}.publish-bar .button{padding:10px 15px}.format-guide{font-size:16px;padding:8px 10px;gap:5px}textarea{font-size:18px;min-height:240px}.class-picker label{font-size:16px;padding:8px 10px}.filter-bar{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;padding:16px}.filter-bar .button{width:100%}.stat-grid{grid-template-columns:1fr 1fr;gap:10px}.stat-grid>div{padding:15px 17px}.stat-grid strong{font-size:29px}.tabs{gap:0}.tabs a{font-size:18px;padding:11px 12px;flex:1;text-align:center}.results-panel{padding:0}td,th{padding:12px;min-width:105px}.preview-table td:first-child{min-width:50px}.login-panel{grid-template-columns:1fr;margin:36px auto;max-width:460px}.login-heading{padding:28px}.login-heading h1{font-size:33px;margin:4px 0 12px}.login-form{padding:28px;gap:19px}}
@media(max-width:360px){.task-card .task-top{gap:6px}.task-card .task-top>.status{padding-inline:6px}.task-progress{column-gap:4px}.rating-button{font-size:22px;gap:5px}.rating-buttons{gap:7px}.task-card{padding:17px}.memory-button{font-size:18px;padding-inline:5px}.task-actions{gap:6px}.page-heading>.button{padding:9px 12px}.study-card{min-height:320px}.prompt-side{min-height:190px}#card-prompt{font-size:38px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}