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.btn-hint{margin-top:8px}.curr-subject summary{cursor:pointer;list-style:none;min-height:44px;display:flex;align-items:center}.curr-subject summary h3{margin:0}.hint{background:#fff4c7;border-radius:var(--radius-sm);padding:12px 16px;margin:0;font-size:1.1rem}.answer-area{display:grid;gap:16px}.practice-actions{display:flex;justify-content:center}.numpad{display:grid;gap:12px}.numpad-display{min-height:80px;border-radius:var(--radius);background:var(--surface);box-shadow:inset 0 0 0 3px var(--primary);font-size:2.6rem;font-weight:900;display:grid;place-items:center;letter-spacing:.06em}.numpad-display .placeholder{color:#d4cde6}.numpad-keys{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.key{min-height:70px;border:none;border-radius:20px;background:var(--surface);font-size:2rem;font-weight:900;box-shadow:0 5px #e2d9c6;touch-action:manipulation;-webkit-user-select:none;user-select:none}.key:active:not(:disabled){transform:translateY(3px);box-shadow:0 2px #e2d9c6}.key:disabled{opacity:.5}.key-muted{background:var(--bg-2)}.key-go{background:var(--good);color:#fff;box-shadow:0 5px #1f7442}.choices{display:grid;grid-template-columns:1fr 1fr;gap:14px}.choices-symbols{grid-template-columns:repeat(3,1fr)}.choice{min-height:92px;border:3px solid var(--line);border-radius:var(--radius);background:var(--surface);font-size:1.9rem;font-weight:900;box-shadow:0 5px #e2d9c6;touch-action:manipulation}.choices-symbols .choice{font-size:3rem}.choice:active:not(:disabled){transform:translateY(3px);box-shadow:none}.choice.right{border-color:var(--good);background:var(--good-soft)}.choice:disabled:not(.right){opacity:.55}.feedback{display:flex;gap:12px;align-items:flex-start;border-radius:var(--radius);padding:16px 18px;font-size:1.15rem;animation:pop .25s ease}.feedback p{margin:0}.fb-icon{font-size:2rem;line-height:1}.fb-correct{background:var(--good-soft);border:3px solid var(--good)}.fb-retry{background:var(--warn-soft);border:3px solid #ffc04d}.fb-solution{background:var(--primary-soft);border:3px solid var(--primary)}@keyframes pop{0%{transform:scale(.94);opacity:0}}.done{display:grid;gap:20px;max-width:760px;margin:0 auto;width:100%}.big-stars{font-size:2.6rem;letter-spacing:4px;word-break:break-all;animation:pop .5s ease}.done-score{font-size:1.4rem;font-weight:900}.done-mastery{display:flex;justify-content:center;align-items:center;gap:10px;font-weight:800}.frac{display:inline-grid;vertical-align:middle;text-align:center;line-height:1.05;margin:0 .12em;font-size:.85em}.frac>span:first-child{border-bottom:.08em solid currentColor;padding:0 .15em}.frac-blank{display:inline-block;min-width:1em;color:var(--primary)}.b10{display:flex;gap:18px;align-items:flex-end;flex-wrap:wrap;justify-content:center}.b10-col{display:grid;gap:8px;justify-items:center;min-width:70px}.b10-items{display:flex;flex-wrap:wrap;gap:4px;max-width:150px;justify-content:center;align-items:flex-end;min-height:40px}.b10-label{display:grid;justify-items:center;font-size:.85rem;color:var(--ink-2)}.b10-label strong{font-size:1.4rem;color:var(--ink)}.b10-th{width:44px;height:44px;background:#8f7fff;border-radius:6px;box-shadow:5px -5px #6c5ce7;margin:6px 6px 0 0}.b10-h{width:40px;height:40px;background:repeating-linear-gradient(0deg,#ff9f5a 0 3px,#ffb57f 3px 4px),#ffb57f;border-radius:4px;border:2px solid #e57a2e}.b10-t{width:9px;height:40px;background:#2bc4b4;border-radius:3px;border:1px solid #12998b}.b10-o{width:10px;height:10px;background:#ef5da8;border-radius:2px;border:1px solid #c63e86}.array{display:grid;gap:8px}.dot{width:22px;height:22px;border-radius:50%;background:var(--primary)}.fraction-bar{width:min(420px,100%);height:auto}.fb-on{fill:#ff8a3d;stroke:#fff;stroke-width:3}.fb-off{fill:#fff;stroke:#d9cfbc;stroke-width:3}.v-stack{display:grid;gap:10px;width:100%;justify-items:center}.clock{width:min(260px,70vw)}.clock-face{fill:#fff;stroke:var(--ink);stroke-width:5}.tick-major{stroke:var(--ink);stroke-width:3}.tick-minor{stroke:#bdb6d2;stroke-width:1.5}.clock-num{font-size:17px;font-weight:900;text-anchor:middle;fill:var(--ink)}.hand-hour{stroke:var(--ink);stroke-width:8;stroke-linecap:round}.hand-minute{stroke:#ff6b3d;stroke-width:5;stroke-linecap:round}.clock-pin{fill:var(--ink)}.rect-visual{width:min(420px,100%)}.rect-shape{fill:#e9f7f5;stroke:#1fb5a8;stroke-width:4}.rect-label{font-size:17px;font-weight:800;text-anchor:middle;fill:var(--ink)}.rect-label.end{text-anchor:end}.rect-label.start{text-anchor:start}.number-line{width:min(520px,100%)}.nl-axis{stroke:var(--ink);stroke-width:3}.nl-tick{stroke:var(--ink);stroke-width:2}.nl-label{font-size:15px;font-weight:800;text-anchor:middle;fill:var(--ink)}.nl-mark{fill:#ff6b3d}.nl-mark-label{font-size:17px;font-weight:900;text-anchor:middle;fill:#d14f20}.column-calc{display:grid;gap:4px;font-size:2rem;font-weight:900;font-variant-numeric:tabular-nums;justify-items:center}.col-head{font-size:.8rem;color:var(--muted)}.col-op{color:var(--primary)}.col-rule{height:4px;background:var(--ink);border-radius:2px;width:100%}.col-blank{width:2.2rem;height:2.4rem;border:2px dashed #cfc5b2;border-radius:8px}.groups{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.group{border:3px dashed #f3a6c8;border-radius:50%;min-width:86px;min-height:86px;padding:12px;display:flex;flex-wrap:wrap;gap:2px;justify-content:center;align-content:center;font-size:1.2rem;max-width:120px}.ask-fab{position:fixed;right:20px;bottom:calc(20px + env(safe-area-inset-bottom));z-index:20;min-height:64px;padding:0 22px;border:none;border-radius:999px;background:var(--ink);color:#fff;font-weight:900;font-size:1.1rem;box-shadow:0 6px 18px #2b23504d;display:flex;align-items:center;gap:8px}.ask-fab span{font-size:1.7rem}.ask-panel{position:fixed;right:20px;bottom:96px;z-index:21;width:min(420px,calc(100vw - 40px));max-height:min(620px,calc(100dvh - 130px));background:var(--surface);border-radius:var(--radius);box-shadow:0 20px 60px #2b23504d;display:grid;grid-template-rows:auto 1fr auto auto auto;overflow:hidden}.ask-head{display:flex;gap:10px;align-items:center;padding:12px 16px;background:var(--primary-soft)}.ask-head strong{flex:1;font-size:1.15rem}.ask-list{overflow-y:auto;padding:14px;display:grid;gap:10px;align-content:start;min-height:160px}.msg{max-width:85%;padding:10px 14px;border-radius:18px}.msg-teacher{background:var(--bg-2);border-top-left-radius:4px}.msg-child{background:var(--primary);color:#fff;justify-self:end;border-top-right-radius:4px}.ask-quick{display:flex;gap:8px;overflow-x:auto;padding:4px 14px 8px}.chip{white-space:nowrap;border:2px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;font-weight:700;min-height:44px}.ask-form{display:flex;gap:8px;padding:0 14px 8px}.ask-form input{flex:1;min-width:0}.ask-note{font-size:.75rem;color:var(--muted);padding:0 14px 12px;margin:0}.parent-bg{background:linear-gradient(160deg,#eeeaff,var(--bg))}.login-card{width:min(420px,100%);display:grid;gap:8px;text-align:left}.login-card h1,.login-card .lock{text-align:center}.lock{font-size:3rem}.parent{max-width:1200px;margin:0 auto;padding:20px 24px 60px;font-size:16px}.parent-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.tab{min-height:52px;padding:0 20px;border-radius:999px;border:2px solid var(--line);background:var(--surface);font-weight:800;display:flex;gap:8px;align-items:center}.tab.on{background:var(--ink);border-color:var(--ink);color:#fff}.badge-alert{background:var(--bad);color:#fff;border-radius:999px;padding:2px 8px;font-size:.8rem;font-weight:900}.report{display:grid;gap:20px}.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}.tile{background:var(--surface);border-radius:var(--radius-sm);padding:16px;box-shadow:var(--shadow-sm);display:grid;gap:2px}.tile-value{font-size:1.5rem;font-weight:900}.tile-label{color:var(--ink-2);font-size:.9rem}.report-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.table{width:100%;border-collapse:collapse;font-size:.95rem}.table th{text-align:left;color:var(--ink-2);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;padding:8px 6px;border-bottom:2px solid var(--line)}.table td{padding:10px 6px;border-bottom:1px solid var(--line);vertical-align:top}.plain{padding-left:1.2em;margin:0 0 8px}.plain li{margin-bottom:6px}.week-chart{padding-top:8px}.wc-plot{position:relative;height:200px;display:grid;grid-template-columns:repeat(7,1fr);gap:8px;align-items:end;border-bottom:2px solid var(--line)}.wc-col{position:relative;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center}.wc-bar{width:min(36px,70%);background:var(--primary);border-radius:4px 4px 0 0;min-height:0;transition:height .5s ease}.wc-val{font-size:.8rem;font-weight:800;color:var(--ink-2);margin-bottom:4px}.wc-day{position:absolute;bottom:-26px;font-size:.8rem;color:var(--ink-2)}.wc-limit{position:absolute;left:0;right:0;border-top:2px dashed #c9c2dd;z-index:1;pointer-events:none}.wc-limit span{position:absolute;right:0;top:-20px;font-size:.75rem;color:var(--muted);background:var(--surface);padding:0 4px}.week-chart{margin-bottom:30px}.curr-subject{margin-top:16px}.curr-subject h3{display:flex;align-items:center;gap:8px}.curr-unit{margin:8px 0 16px}.curr-unit-title{font-weight:800;color:var(--ink-2);font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px}.curr-row{display:grid;grid-template-columns:1fr 120px 200px;gap:12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}.curr-row.dim{grid-template-columns:1fr auto;opacity:.6}.curr-skill{display:grid}.curr-bar{display:grid;gap:2px}.chip-level{font-size:.8rem;font-weight:800;padding:4px 10px;border-radius:999px;text-align:center}.lvl-not-started{background:var(--bg-2);color:var(--ink-2)}.lvl-learning{background:var(--warn-soft);color:var(--warn)}.lvl-practising{background:#e7f0ff;color:#2c63c9}.lvl-mastered{background:var(--good-soft);color:var(--good)}.chat-log{list-style:none;padding:0;margin:12px 0 0;display:grid;gap:8px;max-height:420px;overflow-y:auto}.chat-log li{padding:10px 14px;border-radius:var(--radius-sm);background:var(--bg-2)}.chat-log li.teacher{background:var(--primary-soft)}.chat-log li p{margin:2px 0 0}.chat-log li.flagged{border-left:6px solid var(--warn)}.chat-log li.new{background:var(--warn-soft)}.flag-note{font-size:.9rem;color:var(--warn)}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.danger-zone{margin-top:20px;border-top:2px solid var(--line);padding-top:12px}.danger-zone summary{cursor:pointer;font-weight:800;color:var(--bad);min-height:44px;display:flex;align-items:center}.notice{border-radius:var(--radius-sm);padding:12px 16px;font-weight:700}.notice.ok{background:var(--good-soft);color:#1d6b3d}.notice.bad{background:var(--bad-soft);color:#a32f2f}.notice.warn{background:var(--warn-soft);color:#7a4a00}.btn-inline{background:none;border:none;color:var(--primary);font-weight:800;text-decoration:underline;padding:4px;min-height:44px}.warn-text{color:var(--warn);font-weight:700}.code-box{font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:clamp(1.1rem,5vw,1.6rem);font-weight:800;letter-spacing:.06em;background:var(--bg-2);border-radius:var(--radius-sm);padding:14px;text-align:center;margin:8px 0;display:flex;flex-wrap:wrap;justify-content:center;gap:4px 14px}.code-group{white-space:nowrap}.code-input{font-family:ui-monospace,SF Mono,Menlo,monospace;text-transform:uppercase;flex:1;min-width:0}.sync-list{margin-top:12px}.chooser{border:2px solid var(--line);border-radius:var(--radius-sm);padding:8px 16px;margin:12px 0}.chooser legend{font-weight:800;padding:0 6px}.chooser-avatar{width:36px;height:36px;border-radius:50%;display:inline-grid;place-items:center;font-size:1.3rem}.send-progress{display:grid;justify-items:center;gap:4px}.forgot{margin-top:8px}.forgot summary{cursor:pointer;font-weight:700;color:var(--ink-2);min-height:44px;display:flex;align-items:center}@media(max-width:860px){.practice-grid,.report-grid,.settings-grid{grid-template-columns:1fr}.curr-row{grid-template-columns:1fr;gap:6px}.page-body{padding:12px 16px}.child-head{padding:10px 16px}}@media(max-width:600px){body{font-size:16px}.child-head{padding-right:72px;gap:8px}.child-stats .stat-pill{padding:6px 10px;font-size:.9rem}.child-avatar{width:40px;height:40px;font-size:1.5rem}.ask-fab{top:calc(10px + env(safe-area-inset-top));bottom:auto;right:12px;width:52px;height:52px;min-height:52px;padding:0;justify-content:center;font-size:0}.ask-fab span{font-size:1.8rem}.ask-panel{inset:0;width:100%;max-height:none;height:100dvh;border-radius:0}.page{padding-bottom:24px}.lesson-practice .lesson-title{display:none}.lesson-body{gap:12px}.question-card{min-height:0;padding:16px}.question{font-size:1.6rem}.visual-wrap{padding:8px;margin:8px 0}.dot{width:14px;height:14px}.array{gap:5px}.clock{width:190px}.numpad-display{min-height:56px;font-size:2rem}.numpad-keys{gap:8px}.key{min-height:56px;font-size:1.7rem}.choice{min-height:72px;font-size:1.5rem}.qdot{width:24px;height:24px}.card{padding:18px}.bubble{font-size:1rem}.learn-text{font-size:1.1rem}.profile-card{width:42vw}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}