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#e8ecf0;flex-wrap:wrap}.learn-topbar-left{margin-right:auto}.learn-greeting{font-size:1.1rem;font-weight:700;color:#333}.learn-subjects{display:flex;gap:8px;flex-wrap:wrap}.learn-subject-btn{padding:7px 16px;border-radius:20px;border:2px solid #d0d7de;background:#fff;font-size:.9rem;cursor:pointer;font-weight:600;color:#555;transition:all .2s;position:relative}.learn-subject-btn.active{background:#4a90d9;border-color:#4a90d9;color:#fff}.learn-subject-btn.disabled{opacity:.5;cursor:default}.learn-body{display:flex;flex:1}.learn-sidebar{width:130px;min-width:130px;background:#fff;border-right:2px solid #e8ecf0;padding:16px 10px;display:flex;flex-direction:column;gap:8px}.learn-sidebar-title{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:#999;font-weight:700;margin:0 0 4px}.learn-grade-btn{width:100%;padding:10px 8px;border-radius:10px;border:2px solid #e0e0e0;background:#fafafa;font-size:.85rem;font-weight:600;color:#555;cursor:pointer;text-align:left;transition:all 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#00000021}.cat-card-header{display:flex;align-items:center;gap:10px;padding:14px 14px 12px;background-color:var(--cat-color, #f8f9fa);color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.2)}.cat-card-emoji{font-size:2rem;line-height:1;flex-shrink:0}.cat-card-letter{font-size:.65rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:#00000073}.cat-card-name{font-size:.9rem;font-weight:700;color:#222;line-height:1.25}.cat-card-lessons{padding:8px 10px 12px;display:flex;flex-direction:column;gap:4px}.cat-lesson-btn{display:flex;align-items:center;gap:8px;background:#f5f7fa;border:none;border-radius:7px;padding:6px 10px;font-size:.85rem;color:#333;cursor:pointer;text-align:left;transition:background .15s,color .15s;font-weight:500}.cat-lesson-emoji{font-size:1.1rem;flex-shrink:0}.cat-lesson-btn:hover{background:var(--cat-color);color:#fff;opacity:.9}.cat-lesson-num{font-size:.7rem;font-weight:700;color:#4a90d9;min-width:24px;flex-shrink:0}.learn-coming-soon-panel{text-align:center;padding:60px 20px;color:#888}.learn-coming-soon-panel h2{color:#555;margin:12px 0 8px}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e0f2fe,#fce4ec);padding:20px}.auth-card{background:#fff;border-radius:20px;padding:clamp(24px,5vw,44px);width:100%;max-width:420px;box-shadow:0 8px 32px #0000001f}.auth-logo{font-size:2rem;text-align:center;margin:0 0 20px}.auth-title{font-size:1.4rem;font-weight:800;margin:0 0 4px;color:#1a1a2e}.auth-subtitle{color:#777;font-size:.9rem;margin:0 0 20px}.auth-tabs{display:flex;border-radius:12px;background:#f5f5f5;padding:4px;gap:4px;margin-bottom:20px}.auth-tab{flex:1;padding:10px;border:none;border-radius:10px;background:transparent;font-size:.9rem;font-weight:600;cursor:pointer;color:#666;transition:background .2s,color .2s}.auth-tab-active{background:#fff;color:#1a1a2e;box-shadow:0 1px 4px #0000001f}.auth-form{display:flex;flex-direction:column;gap:14px}.auth-field{display:flex;flex-direction:column;gap:5px}.auth-field label{font-size:.85rem;font-weight:600;color:#444}.auth-field input,.auth-field select{padding:11px 14px;border:2px solid #e0e0e0;border-radius:10px;font-size:1rem;outline:none;transition:border-color .2s}.auth-field input:focus,.auth-field select:focus{border-color:#6c63ff}.auth-optional{font-weight:400;color:#999;font-size:.8rem}.auth-submit-btn{padding:13px;background:#6c63ff;color:#fff;border:none;border-radius:12px;font-size:1rem;font-weight:700;cursor:pointer;margin-top:4px;transition:background .2s,transform .1s}.auth-submit-btn:hover{background:#574fd6}.auth-submit-btn:active{transform:scale(.97)}.auth-submit-btn:disabled{background:#bbb;cursor:not-allowed}.auth-error{color:#e53935;font-size:.88rem;font-weight:600;margin:0;background:#fff3f3;border-radius:8px;padding:8px 12px}.auth-links{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:4px}.auth-link-btn{background:none;border:none;color:#6c63ff;font-size:.88rem;cursor:pointer;padding:0;font-weight:600;text-decoration:underline}.auth-link-sep{color:#ccc}.auth-back-btn{background:none;border:none;color:#6c63ff;font-size:.9rem;cursor:pointer;padding:0;font-weight:600;margin-bottom:16px;display:block}.auth-success-icon{font-size:3rem;text-align:center;margin-bottom:8px}.auth-success-title{text-align:center;font-size:1.4rem;font-weight:800;color:#2e7d32;margin:0 0 10px}.auth-success-msg{color:#555;text-align:center;line-height:1.5;margin:0 0 20px}.dashboard-page{min-height:100vh;background:#f8f9ff;padding:clamp(16px,4vw,40px);max-width:800px;margin:0 auto}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.dashboard-title{font-size:clamp(1.3rem,4vw,1.8rem);font-weight:800;color:#1a1a2e;margin:0}.dashboard-success{text-align:left;background:#e8f5e9;border-radius:10px;padding:10px 16px;margin-bottom:16px;color:#2e7d32;font-weight:600}.dashboard-section{background:#fff;border-radius:16px;padding:24px;box-shadow:0 2px 12px #00000012}.dashboard-section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.dashboard-section-header h2{margin:0;font-size:1.1rem;font-weight:800;color:#1a1a2e}.dashboard-add-btn{background:#6c63ff;color:#fff;border:none;border-radius:10px;padding:8px 16px;font-size:.9rem;font-weight:700;cursor:pointer;transition:background .2s}.dashboard-add-btn:hover{background:#574fd6}.dashboard-kid-form{background:#f8f9ff;border-radius:12px;padding:20px;margin-bottom:20px;display:flex;flex-direction:column;gap:14px}.dashboard-empty{color:#aaa;text-align:center;padding:30px 0;font-size:.95rem}.dashboard-kids-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px}.dashboard-kid-card{background:#f8f9ff;border-radius:14px;padding:20px 12px;text-align:center;border:2px solid #e8e8ff}.dashboard-kid-avatar{font-size:2.4rem;margin-bottom:8px}.dashboard-kid-name{font-size:1rem;font-weight:800;color:#1a1a2e;margin-bottom:4px}.dashboard-kid-grade{font-size:.8rem;color:#888;margin-bottom:8px}.dashboard-kid-status{font-size:.78rem;font-weight:600}.dashboard-kid-status.active{color:#2e7d32}.dashboard-kid-status.inactive{color:#e53935}.learn-topbar-right{display:flex;align-items:center;gap:10px}.stars-btn{background:linear-gradient(135deg,gold,orange);color:#fff;border:none;border-radius:22px;padding:8px 18px;font-size:.9rem;font-weight:700;cursor:pointer;box-shadow:0 3px 10px #ffa50059;transition:transform .15s,box-shadow .15s}.stars-btn:hover{transform:translateY(-2px);box-shadow:0 5px 16px #ffa50073}.rewards-shell{min-height:100vh;padding:0 0 40px;background:linear-gradient(160deg,#fff8ee,#ffefd5,#fde8c8)}.rewards-header{display:flex;align-items:center;gap:16px;padding:18px 28px;background:#fff;border-bottom:2px solid #ffe0a0;flex-wrap:wrap}.rewards-back-btn{background:#f0f0f0;border:none;border-radius:20px;padding:8px 18px;font-size:.9rem;font-weight:700;cursor:pointer;color:#555}.rewards-back-btn:hover{background:#e0e0e0}.rewards-title{flex:1;margin:0;font-size:1.6rem;font-weight:900;color:#1a1a2e}.rewards-total-badge{background:linear-gradient(135deg,gold,orange);color:#fff;border-radius:20px;padding:6px 18px;font-size:1rem;font-weight:800}.rewards-tabs{display:flex;gap:12px;padding:18px 28px 0}.rewards-tab{background:#fff;border:2px solid #ddd;border-radius:24px;padding:8px 22px;font-size:.95rem;font-weight:700;cursor:pointer;color:#666;transition:all .15s}.rewards-tab.active{background:gold;border-color:gold;color:#1a1a2e}.rewards-loading{text-align:center;font-size:1.4rem;padding:60px;color:#888}.rewards-empty{text-align:center;padding:60px 20px;color:#888}.rewards-empty h2{margin:8px 0 4px;color:#555}.rewards-empty p{font-size:.95rem}.rewards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:18px;padding:24px 28px}.reward-card{background:#fff;border-radius:16px;padding:18px 14px;text-align:center;border:2px solid #ffe0a0;box-shadow:0 3px 12px #b4781e1a;transition:transform .15s}.reward-card:hover{transform:translateY(-3px)}.reward-stars{font-size:1.4rem;margin-bottom:8px}.reward-name{font-size:.85rem;font-weight:700;color:#1a1a2e;text-transform:capitalize;margin-bottom:4px}.reward-date{font-size:.75rem;color:#aaa}.progress-list{display:flex;flex-direction:column;gap:12px;padding:24px 28px}.progress-row{background:#fff;border-radius:14px;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px;border:2px solid #eee;box-shadow:0 2px 8px #0000000d}.progress-row.passed{border-color:#c8e6c9}.progress-row.needs-work{border-color:#ffe0b2}.progress-row-left{display:flex;align-items:center;gap:12px}.progress-row-icon{font-size:1.4rem}.progress-row-sub{font-size:.95rem;font-weight:700;color:#1a1a2e;text-transform:capitalize}.progress-row-date{font-size:.78rem;color:#aaa}.progress-row-right{display:flex;flex-direction:column;align-items:flex-end;gap:4px;min-width:130px}.progress-score-bar{width:120px;height:8px;background:#eee;border-radius:4px;overflow:hidden}.progress-score-fill{height:100%;border-radius:4px;transition:width .4s}.progress-score-label{font-size:.8rem;font-weight:700;color:#555}.expvis-container{margin:10px 0;display:flex;flex-direction:column;gap:10px}.expvis-section{background:#fff;border-radius:12px;padding:10px 12px;border:1.5px solid #e0e0e0}.expvis-label{font-size:.78rem;font-weight:700;color:#888;text-transform:uppercase;letter-spacing:.04em;margin-bottom:8px}.expvis-emoji-row{display:flex;flex-wrap:wrap;gap:6px}.expvis-emoji-item{display:flex;flex-direction:column;align-items:center;gap:2px}.expvis-emoji-num{font-size:.7rem;font-weight:800;color:#555;line-height:1}.expvis-emoji-icon{font-size:1.3rem;line-height:1}.expvis-strip{display:flex;flex-wrap:wrap;gap:4px}.expvis-strip-cell{width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:6px;font-size:.85rem;font-weight:700;background:#f5f5f5;color:#555;border:1.5px solid #ddd;transition:transform .2s}.expvis-strip-cell.highlight{background:#4caf50;color:#fff;border-color:#388e3c;transform:scale(1.25);box-shadow:0 2px 8px #4caf5066}.expvis-tenframe{display:grid;grid-template-columns:repeat(5,32px);gap:5px}.expvis-dot{width:32px;height:32px;border-radius:50%;border:2px solid #aaa}.expvis-dot.filled{background:#1565c0;border-color:#1565c0;box-shadow:0 2px 6px #1565c059}.expvis-dot.empty{background:#f5f5f5}.expvis-block-eq{display:flex;align-items:flex-end;gap:10px;flex-wrap:wrap}.expvis-block-group{display:flex;flex-direction:column;align-items:center;gap:4px}.expvis-block-group>.expvis-block{display:inline-flex}.expvis-block-group{display:flex;flex-direction:column;align-items:center}.expvis-block-group>:not(.expvis-block-eq-num){display:flex;flex-wrap:wrap;gap:3px;justify-content:center}.expvis-block-row{display:flex;flex-wrap:wrap;gap:3px;justify-content:center;max-width:140px}.expvis-block-eq-num{font-size:1rem;font-weight:900;color:#333;margin-top:4px}.expvis-eq-op{font-size:1.6rem;font-weight:900;color:#555;margin-bottom:20px}.expvis-block{width:30px;height:30px;border-radius:6px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 4px #00000026;position:relative}.expvis-block-num{font-size:.7rem;font-weight:800;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.4)}.expvis-color-row{display:flex;flex-wrap:wrap;gap:6px}.geo-visual{display:flex;flex-direction:column;align-items:center;gap:20px;padding:12px 0}.geo-shape-wrap{display:flex;flex-direction:column;align-items:center;gap:8px}.geo-svg{width:120px;height:120px}.geo-shape-label{font-size:1rem;font-weight:700;color:#555;text-transform:capitalize}.geo-options{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.geo-opt-btn{display:flex;align-items:center;gap:8px;padding:12px 22px;border-radius:14px;border:3px solid #ccc;background:#f9f9f9;font-size:1.1rem;font-weight:700;cursor:pointer;transition:border-color .15s,background .15s,transform .1s}.geo-opt-btn:hover{border-color:#42a5f5;background:#e3f2fd;transform:scale(1.04)}.geo-opt-selected{border-color:#1976d2!important;background:#bbdefb!important;box-shadow:0 0 0 3px #1976d240}.geo-opt-icon{font-size:1.4rem}.sb-visual{display:flex;flex-direction:column;align-items:center;gap:18px;padding:8px 0 16px}.sb-scene{display:flex;align-items:center;justify-content:center;width:110px;height:110px;background:linear-gradient(135deg,#e3f2fd,#fce4ec);border-radius:50%;box-shadow:0 4px 12px #0000001f}.sb-scene-emoji{font-size:4rem;line-height:1;-webkit-user-select:none;user-select:none}.sb-hint{font-size:.95rem;font-weight:600;color:#555;text-align:center}.sb-hint-count{color:#1976d2;font-weight:700}.sb-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:14px;width:100%;max-width:420px;padding:0 4px}.sb-card{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px 10px 12px;border-radius:18px;border:3px solid #e0e0e0;background:#fafafa;cursor:pointer;transition:border-color .15s,background .15s,transform .12s,box-shadow .15s;min-height:130px}.sb-card:hover{border-color:#90caf9;background:#e3f2fd;transform:translateY(-3px);box-shadow:0 6px 16px #1976d22e}.sb-card-selected{border-color:#1976d2!important;background:#bbdefb!important;box-shadow:0 0 0 4px #1976d238!important}.sb-card:active{transform:scale(.96)}.sb-checkmark{position:absolute;top:6px;right:10px;font-size:1rem;font-weight:900;color:#1565c0;line-height:1}.sb-shape-icon{width:64px;height:64px;flex-shrink:0}.sb-shape-svg{width:100%;height:100%}.sb-card-label{font-size:.85rem;font-weight:700;color:#333;text-align:center;line-height:1.2}.sb-check-row{margin-top:4px}.sb-check-btn{padding:12px 36px;border-radius:50px;border:3px solid #e0e0e0;background:#f5f5f5;font-size:1rem;font-weight:700;color:#aaa;cursor:not-allowed;transition:all .2s}.sb-check-ready{border-color:#43a047!important;background:#e8f5e9!important;color:#2e7d32!important;cursor:pointer!important;box-shadow:0 3px 10px #43a04740}.sb-check-ready:hover{background:#c8e6c9!important;transform:scale(1.04)}.csd-overlay{position:fixed;inset:0;background:#0006;opacity:0;pointer-events:none;z-index:200;transition:opacity .28s ease}.csd-overlay-visible{opacity:1;pointer-events:all}.csd-drawer{position:fixed;top:0;right:0;height:100%;width:min(520px,96vw);background:#fafafa;box-shadow:-6px 0 32px #00000038;z-index:201;display:flex;flex-direction:column;transform:translate(100%);transition:transform .3s cubic-bezier(.4,0,.2,1);border-radius:20px 0 0 20px}.csd-header{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 16px;border-bottom:2px solid #e8eaf6;background:linear-gradient(135deg,#e8eaf6,#fce4ec);border-radius:20px 0 0;flex-shrink:0}.csd-title{font-size:1.15rem;font-weight:800;color:#1a237e}.csd-header-actions{display:flex;align-items:center;gap:10px}.csd-read-btn{padding:8px 16px;border-radius:22px;border:2px solid #90caf9;background:#e3f2fd;font-size:.9rem;font-weight:700;color:#1565c0;cursor:pointer;transition:background .15s,transform .1s;white-space:nowrap}.csd-read-btn:hover{background:#bbdefb;transform:scale(1.04)}.csd-close-btn{width:36px;height:36px;border-radius:50%;border:2px solid #e0e0e0;background:#fff;font-size:1.1rem;font-weight:700;color:#555;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s,color .15s}.csd-close-btn:hover{background:#ffebee;color:#c62828;border-color:#ef9a9a}.csd-body{flex:1;overflow-y:auto;padding:16px 18px 28px;display:flex;flex-direction:column;gap:16px}.csd-section-card{background:#fff;border-radius:18px;border:2px solid #e8eaf6;padding:16px 18px 18px;box-shadow:0 2px 8px #0000000f;display:flex;flex-direction:column;align-items:center;gap:10px}.csd-shape-wrap{display:flex;align-items:center;justify-content:center;width:160px;height:160px;background:linear-gradient(135deg,#f5f5f5,#e8eaf6);border-radius:50%;box-shadow:0 4px 14px #0000001a;flex-shrink:0}.csd-shape-svg{width:110px;height:110px}.csd-heading{font-size:1.05rem;font-weight:800;color:#1a237e;margin:0;text-align:center}.csd-para{font-size:.92rem;color:#444;line-height:1.6;margin:0;align-self:flex-start;width:100%}.csd-bullet{display:flex;gap:8px;font-size:.92rem;color:#444;line-height:1.55;align-self:flex-start;width:100%}.csd-bullet-dot{color:#42a5f5;font-size:.8rem;margin-top:3px;flex-shrink:0}.quiz-top-left{display:flex;align-items:center;gap:10px}.csd-tips-btn{padding:7px 14px;border-radius:20px;border:2px solid #ffcc02;background:#fffde7;font-size:.85rem;font-weight:700;color:#f57f17;cursor:pointer;transition:background .15s,transform .1s;white-space:nowrap}.csd-tips-btn:hover{background:#fff9c4;transform:scale(1.05)}.geo-opt-btn{position:relative}.geo-opt-text{flex:1}.geo-voice-btn{margin-left:6px;padding:2px 6px;border-radius:10px;border:none;background:transparent;font-size:1rem;cursor:pointer;opacity:.55;transition:opacity .15s,transform .1s;flex-shrink:0}.geo-voice-btn:hover{opacity:1;transform:scale(1.18)}.pat-visual{display:flex;flex-direction:column;align-items:center;gap:24px;padding:8px 0 16px}.pat-strip-wrap{display:flex;flex-direction:column;align-items:center;gap:0;width:100%}.pat-strip{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center;background:var(--lesson-surface-bg);border-radius:18px;border:1.5px solid var(--lesson-surface-border);padding:16px 20px;box-shadow:inset 0 1px 3px #0000000d}.pat-arrow{font-size:1.6rem;color:#aaa;font-weight:700}.pat-dot{border-radius:14px;display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0;transition:transform .12s;padding:0 6px;text-align:center}.pat-dot-lg{width:64px;height:64px;font-size:1.6rem}.pat-dot-md{width:48px;height:48px;font-size:1.2rem}.pat-dot-sm{width:36px;height:36px;font-size:1rem}.pat-dot-text{line-height:1;font-weight:800;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pat-dot-question{background:#fff!important;border:3px dashed #bbb!important;color:#999;font-size:1.8rem;font-weight:900}.pat-options{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.pat-opt-btn{display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px 18px;border-radius:18px;border:2px solid var(--lesson-surface-border);background:var(--lesson-surface-bg);cursor:pointer;font-size:1rem;font-weight:700;min-width:90px;transition:transform .12s,border-color .15s,box-shadow .15s}.pat-opt-btn:hover{transform:translateY(-3px);border-color:#90caf9}.pat-opt-selected{transform:scale(1.06)!important}.pat-opt-label{font-size:.88rem;font-weight:700;color:inherit}.sb-scene{width:140px;height:140px}.sb-scene-emoji{font-size:5.5rem}.exp-steps{display:flex;flex-direction:column;gap:8px;margin:10px 0 6px}.exp-step{display:flex;align-items:flex-start;gap:10px}.exp-step-badge{width:26px;height:26px;border-radius:50%;background:#1565c0;color:#fff;font-size:.78rem;font-weight:900;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}.exp-step-text{font-size:.95rem;line-height:1.55;color:#333}.exp-step-math{font-family:Courier New,Courier,monospace;font-weight:700;font-size:1rem;color:#1565c0;letter-spacing:.5px}.exp-step-answer{background:#e8f5e9;border-left:3px solid #43a047;border-radius:0 8px 8px 0;padding:5px 10px 5px 6px}.exp-step-answer .exp-step-badge{background:#43a047;font-size:.95rem}.exp-step-answer .exp-step-text{font-weight:700;color:#2e7d32}.sc-wrap{width:100%;display:flex;flex-direction:column;align-items:center;gap:14px;margin-top:4px}.sc-mode-pill{font-size:.9rem;font-weight:900;padding:6px 12px;border-radius:999px;border:2px solid transparent}.sc-prompt{margin:0;font-size:1.2rem;font-weight:800;color:#37474f;text-align:center}.sc-track{width:min(100%,720px);display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;padding:16px;border-radius:16px;border:1.5px solid #f9e4b7;background:#fff8ed}.sc-chip{min-width:56px;height:56px;border-radius:14px;background:#e3f2fd;color:#0d47a1;border:2px solid #90caf9;display:flex;align-items:center;justify-content:center;font-size:1.35rem;font-weight:900;box-shadow:0 2px #0d47a124}.sc-missing{background:#fff3e0;color:#e65100;border-color:#ffb74d}.sc-arrow{font-size:1.2rem;font-weight:900;color:#7e57c2}.sc-options{display:grid;grid-template-columns:repeat(3,minmax(86px,1fr));gap:10px;width:min(100%,420px)}.sc-option{min-height:52px;border:2px solid #cfd8dc;border-radius:12px;background:#fff;color:#263238;font-size:1.25rem;font-weight:900;cursor:pointer;transition:transform .12s ease,box-shadow .12s ease,border-color .12s ease}.sc-option:hover:not(:disabled){transform:translateY(-2px);border-color:#90caf9;box-shadow:0 4px 10px #2196f329}.sc-opt-correct{background:#e8f5e9!important;border-color:#43a047!important;color:#1b5e20!important}.sc-opt-correct-lite{background:#f1f8e9;border-color:#9ccc65}.sc-opt-wrong{background:#ffebee!important;border-color:#e53935!important;color:#b71c1c!important}.sc-checking{font-size:.95rem;font-weight:800;color:#5e35b1;background:#ede7f6;border-radius:999px;padding:8px 12px}.sc-mode-2 .sc-mode-pill,.sc-mode-2 .sc-chip{background:#e3f2fd;border-color:#90caf9;color:#0d47a1}.sc-mode-5 .sc-mode-pill{background:#e8f5e9;border-color:#a5d6a7;color:#1b5e20}.sc-mode-5 .sc-chip{background:#e8f5e9;border-color:#81c784;color:#1b5e20}.sc-mode-10 .sc-mode-pill,.sc-mode-10 .sc-chip{background:#e8eaf6;border-color:#9fa8da;color:#283593}.sc-mode-100 .sc-mode-pill{background:#fff3e0;border-color:#ffcc80;color:#e65100}.sc-mode-100 .sc-chip{min-width:74px;background:#fff3e0;border-color:#ffb74d;color:#e65100}.sc-mode-100 .sc-option{font-size:1.1rem}.c120x-wrap{width:100%;display:flex;flex-direction:column;align-items:center;gap:12px}.c120x-no-title{gap:18px}.c120x-inline-only{width:min(100%,760px);align-items:flex-start}.c120x-seq-question{margin:0;font-size:1.15rem;font-weight:900;color:#37474f;text-align:left}.c120x-inline-seq-line{width:100%;display:flex;align-items:center;justify-content:flex-start;gap:8px;flex-wrap:wrap}.c120x-inline-num{font-size:1.12rem;font-weight:900;color:#37474f;min-width:24px;text-align:center}.c120x-inline-comma{font-size:1.15rem;font-weight:900;color:#546e7a}.c120x-seq-input{width:62px;height:42px;border:2px solid #ffb74d;border-radius:8px;background:#fffdf7;text-align:center;font-size:1.02rem;font-weight:900;color:#263238;outline:none}.c120x-seq-input:focus{border-color:#ef6c00;box-shadow:0 0 0 3px #ef6c002e}.c120x-prompt{margin:0;font-size:1.18rem;font-weight:900;color:#37474f;text-align:center}.c120x-title{font-size:1.15rem;font-weight:900;color:#37474f}.c120x-label{font-size:.95rem;font-weight:700;color:#607d8b;text-align:center}.c120x-card{width:min(100%,560px);border-radius:14px;border:2px solid #d1c4e9;background:#faf5ff;padding:12px;text-align:center}.c120x-word{margin-top:8px;font-size:1.35rem;font-weight:900;color:#6a1b9a;text-transform:capitalize}.c120x-word-standalone{margin-top:0;padding:10px 14px;border-radius:12px;border:2px solid #d1c4e9;background:#faf5ff}.c120x-chart-grid{width:min(100%,820px);max-height:none;overflow:visible;padding:10px;border:2px solid #d7ccc8;border-radius:14px;background:#fffdf7;display:grid;grid-template-columns:repeat(10,minmax(34px,1fr));gap:6px}.c120x-chart-layout{width:min(100%,980px);display:flex;align-items:flex-start;gap:18px;justify-content:center}.c120x-input-panel{width:180px;display:flex;flex-direction:column;gap:10px;padding:14px;border-radius:14px;border:2px solid #d1c4e9;background:#faf5ff;flex:0 0 auto}.c120x-chart-cell{min-height:42px;border-radius:8px;border:2px solid #e0e0e0;background:#fff;color:#37474f;font-weight:800;font-size:.98rem;cursor:pointer}.c120x-chart-cell:hover:not(:disabled){border-color:#90caf9;background:#f5fbff}.c120x-chart-picked{border-color:#43a047!important;background:#e8f5e9!important;color:#1b5e20!important}.c120x-chart-miss{border-color:#ffb74d!important;background:#fff3e0!important;color:transparent!important;box-shadow:inset 0 0 0 3px #e6510024}.c120x-answer-input{width:180px;background:#fff}.c120x-input-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center}.c120x-two-inputs{gap:8px}.c120x-input{width:140px;height:44px;border:2px solid #b0bec5;border-radius:10px;text-align:center;font-size:1.1rem;font-weight:800;color:#263238;outline:none}.c120x-input:focus{border-color:#42a5f5;box-shadow:0 0 0 3px #42a5f533}.c120x-seq-line{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px}.c120x-seq-5{gap:6px}.c120x-seq-pill{min-width:56px;height:48px;border-radius:10px;border:2px solid #cfd8dc;background:#fff;display:flex;align-items:center;justify-content:center;font-size:1.08rem;font-weight:900;color:#37474f}.c120x-seq-miss{border-color:#ffb74d;background:#fff3e0;color:#e65100}.c120x-seq-arrow{color:#7e57c2;font-size:1rem;font-weight:900}.c120x-checking{font-size:.95rem;font-weight:800;color:#5e35b1;background:#ede7f6;border-radius:999px;padding:8px 12px}@media(max-width:640px){.c120x-inline-only{width:100%}.c120x-chart-layout{flex-direction:column;align-items:center}.c120x-input-panel{width:min(100%,320px)}.c120x-chart-grid{grid-template-columns:repeat(10,minmax(0,1fr));width:100%}.c120x-chart-cell{min-height:38px;font-size:.9rem}.c120x-input{width:120px}.c120x-seq-input{width:54px;height:40px;font-size:.95rem}}@media(max-width:640px){.sc-prompt{font-size:1.05rem}.sc-chip{min-width:48px;height:48px;font-size:1.15rem}.sc-options{width:min(100%,340px);grid-template-columns:repeat(3,minmax(76px,1fr))}}.eo-wrap{width:100%;display:flex;flex-direction:column;align-items:center;gap:14px}.eo-prompt{margin:0;text-align:center;font-size:23px;font-weight:800;color:#37474f}.eo-scene{width:min(100%,820px);background:linear-gradient(180deg,#fffef7,#f5f9ff);border:3px solid #dbeafe;border-radius:24px;padding:16px 14px;display:flex;flex-direction:column;align-items:center;gap:14px}.eo-number-chip{min-width:96px;padding:12px 16px;text-align:center;font-size:34px;font-weight:900;color:#0d47a1;border:3px solid #90caf9;border-radius:18px;background:#fff;cursor:grab;-webkit-user-select:none;user-select:none}.eo-drop-row{width:100%;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.eo-drop-zone,.eo-target-box{min-width:220px;min-height:62px;padding:12px;border:3px solid #b39ddb;border-radius:16px;background:#faf7ff;color:#5e35b1;font-size:20px;font-weight:800;display:flex;align-items:center;justify-content:center;text-align:center}.eo-options-row{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.eo-option-card{min-width:88px;padding:12px 14px;border-radius:14px;border:3px solid #b3e5fc;background:#fff;color:#0277bd;font-size:28px;font-weight:900;text-align:center;cursor:grab;-webkit-user-select:none;user-select:none}.eo-picked{background:#c8e6c9!important;border-color:#43a047!important;color:#1b5e20!important}.eo-checking{font-size:15px;font-weight:800;color:#5e35b1;background:#ede7f6;border-radius:999px;padding:8px 12px}@media(max-width:640px){.eo-prompt{font-size:19px}.eo-option-card{min-width:74px;font-size:24px}.eo-drop-zone,.eo-target-box{min-width:170px;font-size:18px}}.pv-visual{display:flex;flex-direction:column;align-items:center;gap:22px;padding:8px 0 20px}.pv-big-number{display:flex;gap:4px;font-size:5rem;font-weight:900;letter-spacing:10px}.pv-big-digit{display:inline-block;animation:pv-drop .4s ease backwards}.pv-big-digit:nth-child(1){animation-delay:0s}.pv-big-digit:nth-child(2){animation-delay:.1s}.pv-big-digit:nth-child(3){animation-delay:.2s}@keyframes pv-drop{0%{transform:translateY(-18px);opacity:0}to{transform:translateY(0);opacity:1}}.pv-cards{display:flex;gap:14px}.pv-card{display:flex;flex-direction:column;align-items:center;gap:2px;width:96px;padding:12px 8px 14px;border-radius:18px;border:3px solid var(--c);background:#fff;box-shadow:0 6px 0 var(--c);cursor:pointer;transition:transform .12s,box-shadow .12s,background .15s;position:relative}.pv-card:hover:not(.pv-card-picked){transform:translateY(-5px);box-shadow:0 11px 0 var(--c)}.pv-card.pv-card-picked{background:var(--bg);transform:translateY(4px);box-shadow:0 2px 0 var(--c)}.pv-card-place{font-size:.68rem;font-weight:800;color:var(--c);text-transform:uppercase;letter-spacing:.5px}.pv-card-digit{font-size:3rem;font-weight:900;color:var(--c);line-height:1.1}.pv-card-check{position:absolute;top:6px;right:9px;font-size:1rem;font-weight:900;color:var(--c)}.pv-blocks{display:flex;gap:6px;align-items:stretch;padding:14px 20px 10px;background:#ffffffa6;border-radius:18px;border:2px solid #f0e0c0}.pv-block-col{display:flex;flex-direction:column;align-items:center;gap:6px;min-width:72px}.pv-block-title{font-size:.68rem;font-weight:800;text-transform:uppercase;letter-spacing:.4px}.pv-block-group{display:flex;flex-wrap:wrap;gap:4px;justify-content:center;min-height:48px;align-items:flex-end}.pv-block-value{font-size:.85rem;font-weight:800}.pv-block-divider{width:1px;background:#e0d0b0;margin:0 4px;border-radius:1px}.pv-h-block{width:44px;height:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:2px;padding:4px;background:#fff3e0;border:2px solid #e65100;border-radius:6px}.pv-h-dot{background:#e65100;border-radius:1px}.pv-t-block{width:14px;height:44px;display:flex;flex-direction:column;gap:2px;padding:3px;background:#e3f2fd;border:2px solid #1565c0;border-radius:4px}.pv-t-dot{flex:1;background:#1565c0;border-radius:1px}.pv-o-block{width:14px;height:14px;background:#2e7d32;border:2px solid #1b5e20;border-radius:3px}.pv-place-labels{display:flex;gap:28px;margin-top:-10px}.pv-place-label-text{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.5px;width:60px;text-align:center}.pv-input-wrap{display:flex;flex-direction:column;align-items:center;gap:10px;margin-top:6px}.pv-input-label{font-size:1rem;font-weight:700;color:#5d4037}.pv-answer-box{width:100px;height:100px;font-size:3.5rem;font-weight:900;color:#e65100;text-align:center;border:4px dashed #e65100;border-radius:18px;background:#fff8f0;outline:none;transition:border-color .15s,box-shadow .15s;appearance:textfield;-moz-appearance:textfield}.pv-answer-box::-webkit-outer-spin-button,.pv-answer-box::-webkit-inner-spin-button{-webkit-appearance:none}.pv-answer-box:focus{border-color:#bf360c;box-shadow:0 0 0 4px #e6510033}.pv-answer-box:disabled{opacity:.6;cursor:not-allowed}.pv-check-btn{padding:14px 40px;font-size:1.2rem;font-weight:800;color:#fff;background:#43a047;border:none;border-radius:14px;box-shadow:0 5px #2e7d32;cursor:pointer;transition:transform .1s,box-shadow .1s}.pv-check-btn:hover{transform:translateY(-3px);box-shadow:0 8px #2e7d32}.pv-check-btn:active{transform:translateY(3px);box-shadow:0 2px #2e7d32}.pv-visual{display:flex;flex-direction:column;align-items:flex-start;gap:14px;padding:4px 0 8px}.pv-number-display{font-size:1.5rem;font-weight:700;color:#222;letter-spacing:2px}.pv-input-row{display:flex;align-items:center;gap:12px}.pv-answer-input{width:58px;height:48px;font-size:1.6rem;font-weight:800;color:#333;text-align:center;border:2px solid #bbb;border-radius:10px;background:#fff;outline:none;transition:border-color .15s,box-shadow .15s;appearance:textfield;-moz-appearance:textfield}.pv-answer-input::-webkit-outer-spin-button,.pv-answer-input::-webkit-inner-spin-button{-webkit-appearance:none}.pv-answer-input:focus{border-color:#e65100;box-shadow:0 0 0 3px #e6510022}.pv-answer-input:disabled{background:#f5f5f5;color:#999}.pv-check-btn{padding:10px 24px;font-size:1rem;font-weight:800;color:#fff;background:#43a047;border:none;border-radius:10px;box-shadow:0 4px #2e7d32;cursor:pointer;transition:transform .1s,box-shadow .1s}.pv-check-btn:hover{transform:translateY(-2px);box-shadow:0 6px #2e7d32}.pv-check-btn:active{transform:translateY(2px);box-shadow:0 2px #2e7d32}.acv-container{display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin:4px 0 8px}.acv-notebook{background:#fdfdf5;border:2px solid #d4c5a9;border-radius:14px;padding:16px 20px 16px 16px;box-shadow:0 4px 14px #00000017;background-image:repeating-linear-gradient(transparent,transparent 55px,#ddd8cc 55px,#ddd8cc 57px)}.acv-row{display:flex;align-items:center}.acv-sign-col{width:32px;flex-shrink:0;display:flex;align-items:center;justify-content:flex-end;padding-right:3px;height:42px}.acv-digit-col{width:44px;flex-shrink:0;display:flex;align-items:center;justify-content:center;height:42px}.acv-hdr{font-size:.78rem;font-weight:900;color:#aaa;text-transform:uppercase;letter-spacing:1px;height:26px!important}.acv-plus{font-size:1.7rem;font-weight:900;color:#1565c0}.acv-minus{font-size:1.7rem;font-weight:900;color:#c62828}.acv-num{font-size:1.7rem;font-weight:800;color:#222;font-family:Courier New,Courier,monospace}.acv-line{height:3px;background:#333;border-radius:2px;margin:3px 0 0}.acv-box{width:38px;height:38px;font-size:1.6rem;font-weight:800;color:#1565c0;border:2px dashed #bbb;border-radius:8px;background:#f8f9ff;cursor:pointer;-webkit-user-select:none;user-select:none;transition:border-color .12s,background .12s,box-shadow .12s}.acv-box-active{border:2.5px solid #1565c0!important;background:#e3f2fd!important;box-shadow:0 0 0 3px #1565c033}.acv-box-filled{border:2px solid #42a5f5;background:#e8f4fd;color:#0d47a1}.acv-ans-row{margin-top:5px}.bnp-bar{position:fixed;bottom:0;left:0;right:0;z-index:999;background:#fff;border-top:3px solid #e0e0e0;box-shadow:0 -4px 20px #00000021;padding:8px 14px;display:flex;align-items:center;gap:5px;flex-wrap:nowrap;overflow-x:auto}.bnp-display{display:flex;align-items:center;justify-content:center;min-width:72px;height:50px;font-size:1.6rem;font-weight:900;color:#1565c0;background:#e3f2fd;border:2.5px solid #1565c0;border-radius:10px;padding:0 12px;margin-right:10px;flex-shrink:0}.bnp-empty{color:#bbb;font-size:1.2rem}.bnp-key{width:50px;height:50px;font-size:1.3rem;font-weight:700;color:#333;background:#f5f5f5;border:2px solid #e0e0e0;border-radius:10px;cursor:pointer;transition:background .1s,transform .08s;flex-shrink:0}.bnp-key:hover:not(:disabled){background:#e8eaf6;border-color:#7986cb;transform:translateY(-2px)}.bnp-key:active:not(:disabled){transform:scale(.91)}.bnp-key:disabled{opacity:.38;cursor:not-allowed}.bnp-del{background:#fff3e0;border-color:#ffb74d;color:#e65100}.bnp-del:hover:not(:disabled){background:#ffe0b2}.bnp-submit{height:50px;padding:0 22px;font-size:1rem;font-weight:900;color:#fff;background:#43a047;border:none;border-radius:10px;box-shadow:0 4px #2e7d32;cursor:pointer;transition:transform .1s,box-shadow .1s;margin-left:8px;flex-shrink:0;white-space:nowrap}.bnp-submit:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px #2e7d32}.bnp-submit:active:not(:disabled){transform:translateY(2px);box-shadow:0 2px #2e7d32}.bnp-submit:disabled{background:#bdbdbd;box-shadow:0 4px #9e9e9e;cursor:not-allowed}.theme-grade-3 .learn-shell{background:#f0f4f8;background-image:radial-gradient(#d1d9e6 .5px,transparent .5px);background-size:20px 20px}.theme-grade-3 .cat-card{border-radius:6px;border:1px solid #e2e8f0;box-shadow:0 4px 6px -1px #0000001a}.theme-grade-3 .learn-grade-btn.active{background:#4f46e5;color:#fff}.theme-grade-3 .cat-lesson-btn{background:#fff;border:1px solid #edf2f7;border-radius:4px}.theme-grade-3 .cat-card-name{color:#1a202c;letter-spacing:-.01em}.theme-grade-3 .cat-lesson-btn:hover{color:#000;opacity:1}.csd-overlay{position:fixed;inset:0;background:#0000;opacity:0;pointer-events:none;transition:opacity .3s ease;z-index:999}.csd-overlay-visible{background:#00000080;opacity:1;pointer-events:auto}.csd-drawer{position:fixed;top:0;right:0;width:100%;max-width:460px;height:100vh;background:linear-gradient(180deg,#fffef9,#f5f7fa);box-shadow:-8px 0 32px #0000001f;display:flex;flex-direction:column;transform:translate(100%);transition:transform .3s cubic-bezier(.4,0,.2,1);z-index:1000;border-radius:12px 0 0 12px}.csd-drawer-open{transform:translate(0)}.csd-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:2px solid #e6eef6;background:linear-gradient(90deg,#ffeaa7,#fab1a0);flex:0 0 auto}.csd-title{font-size:22px;font-weight:900;color:#2c3e50;margin:0}.csd-header-actions{display:flex;gap:8px;align-items:center}.csd-read-btn,.csd-close-btn{padding:8px 12px;border:none;border-radius:8px;background:#fff;color:#2c3e50;font-size:16px;font-weight:700;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 8px #0000001a}.csd-read-btn:hover,.csd-close-btn:hover{background:#f0f0f0;transform:scale(1.05)}.csd-close-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;padding:0}.csd-body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.csd-body::-webkit-scrollbar{width:8px}.csd-body::-webkit-scrollbar-track{background:transparent}.csd-body::-webkit-scrollbar-thumb{background:#d0d7e0;border-radius:4px}.csd-body::-webkit-scrollbar-thumb:hover{background:#b0b7c0}.csd-pv-example{background:linear-gradient(135deg,#e3f2fd,#f3e5f5);border:3px solid #90caf9;border-radius:16px;padding:20px;margin-bottom:12px;box-shadow:0 4px 16px #42a5f526}.csd-pv-title{font-size:18px;font-weight:900;color:#1565c0;margin-bottom:14px;text-align:center}.csd-pv-number{display:flex;justify-content:center;gap:6px;margin-bottom:16px;font-size:48px;font-weight:900}.csd-pv-digit{min-width:60px;text-align:center}.csd-pv-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}.csd-pv-card{padding:12px;border-radius:12px;background:var(--bg);border:3px solid var(--c);text-align:center;display:flex;flex-direction:column;gap:6px}.csd-pv-card-place{font-size:12px;font-weight:700;color:var(--c);text-transform:uppercase}.csd-pv-card-digit{font-size:32px;font-weight:900;color:var(--c)}.csd-pv-card-means{font-size:11px;font-weight:600;color:#555}.pv-blocks{display:flex;justify-content:space-around;gap:8px;flex-wrap:wrap;margin-bottom:12px}.pv-block-col{text-align:center;flex:0 1 auto}.pv-block-title{font-size:13px;font-weight:800;margin-bottom:6px}.pv-block-group{display:flex;flex-wrap:wrap;gap:4px;justify-content:center;margin-bottom:6px}.pv-h-block,.pv-t-block{display:grid;gap:2px;padding:4px;background:#fff;border-radius:4px;border:1px solid #ccc}.pv-h-block{grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);width:52px;height:52px}.pv-t-block{grid-template-columns:repeat(5,1fr);width:48px;height:20px}.pv-h-dot,.pv-t-dot{width:100%;height:100%;background:#ff9800;border-radius:2px}.pv-o-block{width:14px;height:14px;background:#43a047;border-radius:50%;display:inline-block}.pv-block-divider{width:1px;height:80px;background:#ccc}.pv-block-value{font-size:16px;font-weight:900}.csd-pv-tip{padding:12px;border-radius:10px;background:#fff9c4;border-left:4px solid #f9a825;font-size:13px;font-weight:600;color:#555;line-height:1.5}.csd-section-card{background:#fff;border:2px solid #e6eef6;border-radius:14px;padding:16px;box-shadow:0 2px 8px #0000000d;transition:all .2s ease}.csd-section-card:hover{box-shadow:0 4px 16px #0000001a;transform:translateY(-2px)}.csd-shape-wrap{width:100%;display:flex;justify-content:center;margin-bottom:12px}.csd-shape-svg{max-width:120px;height:auto;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1))}.csd-heading{margin:0 0 12px;font-size:18px;font-weight:900;color:#2c3e50;display:flex;align-items:center;gap:8px}.csd-section-card .csd-heading{color:#2c3e50}.csd-section-card:has(.csd-heading:contains("Even")) .csd-heading{color:#1b5e20}.csd-section-card:nth-child(1) .csd-heading{color:#1b5e20}.csd-section-card:nth-child(2) .csd-heading{color:#e65100}.csd-bullet{display:flex;gap:10px;margin-bottom:8px;font-size:14px;line-height:1.6;color:#555}.csd-bullet-dot{color:#ff9800;font-weight:900;flex:0 0 auto;margin-top:2px}.csd-para{margin:0 0 8px;font-size:14px;line-height:1.6;color:#555}.csd-section-card strong{font-weight:900;color:#2c3e50}.csd-bullet strong,.csd-para strong{font-size:16px;color:#ff9800}.csd-section-card:nth-child(1) strong{color:#2e7d32}.csd-section-card:nth-child(2) strong{color:#ff6f00}@media(max-width:768px){.csd-drawer{max-width:100%}.csd-header{padding:12px 16px}.csd-title{font-size:18px}.csd-body{padding:12px}.csd-pv-number{font-size:36px}.csd-pv-cards{grid-template-columns:1fr}.pv-blocks{flex-direction:column}.csd-section-card{padding:12px}}