:root{--sky:#38bdf8;--sky-dark:#0284c7;--sun:#fbbf24;--grass:#34d399;--berry:#f472b6;--ink:#1e293b;--paper:#fff;--cloud:#f1f5f9;--radius:18px;--shadow:0 4px 14px #0f172a14;--font-fun:"Baloo 2", cursive;--font-body:"Nunito", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);color:var(--ink);background:linear-gradient(#e0f2fe 0%,#f0fdf4 100%);min-height:100vh}h1,h2,h3{font-family:var(--font-fun)}button{font-family:var(--font-fun);cursor:pointer;border:none;font-size:1rem}button:disabled{cursor:not-allowed;opacity:.55}.btn-primary{background:var(--sky-dark);color:#fff;border-radius:999px;padding:10px 20px;font-weight:700;transition:transform .1s;box-shadow:0 3px #075985}.btn-primary:hover:not(:disabled){transform:translateY(-2px)}.btn-primary.big{padding:14px 28px;font-size:1.2rem}.btn-secondary{background:var(--sun);color:#78350f;border-radius:999px;padding:10px 20px;font-weight:700;box-shadow:0 3px #b45309}.btn-secondary:hover{transform:translateY(-2px)}.btn-ghost{color:var(--sky-dark);background:0 0;border:2px solid #0000;border-radius:999px;padding:8px 16px;font-weight:700}.btn-ghost:hover{border-color:var(--sky)}.btn-ghost.small{padding:5px 12px;font-size:.85rem}.btn-nav{color:var(--sky-dark);box-shadow:var(--shadow);background:#fff;border-radius:999px;padding:8px 16px;font-weight:700}.btn-nav.active{background:var(--sun);color:#78350f}.loading-screen{flex-direction:column;justify-content:center;align-items:center;gap:14px;min-height:100vh;display:flex}.loading-screen p{font-family:var(--font-fun);color:var(--sky-dark);font-size:1.2rem;font-weight:700}.auth-screen{flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:40px;max-width:1100px;margin:0 auto;padding:50px 24px;display:flex}.auth-hero{text-align:center;max-width:420px}.auth-hero .bird-wrap{margin:0 auto}.logo{color:var(--ink);font-size:4rem;line-height:1}.logo span{color:var(--sky-dark)}.tagline{color:#475569;margin-top:10px;font-size:1.1rem;font-weight:600}.hero-pills{flex-wrap:wrap;justify-content:center;gap:8px;margin-top:18px;display:flex}.pill{box-shadow:var(--shadow);background:#fff;border-radius:999px;padding:7px 14px;font-size:.9rem;font-weight:700}.auth-card{background:var(--paper);border-radius:var(--radius);box-shadow:var(--shadow);width:460px;max-width:100%;padding:28px}.auth-tabs{gap:8px;margin-bottom:20px;display:flex}.auth-tabs button{background:var(--cloud);color:#64748b;border-radius:12px;flex:1;padding:10px;font-weight:700}.auth-tabs button.active{background:var(--sky-dark);color:#fff}.auth-form{flex-direction:column;gap:14px;display:flex}.auth-form h3{margin-top:6px}.auth-form label{color:#475569;flex-direction:column;gap:5px;font-size:.9rem;font-weight:700;display:flex}.auth-form input,.auth-form select{font-size:1rem;font-family:var(--font-body);border:2px solid #e2e8f0;border-radius:12px;padding:11px 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auto;display:flex}.vis-emoji{font-size:1.9rem}.vis-emoji.faded{opacity:.25;filter:grayscale();position:relative}.vis-emoji.faded:after{content:"✖";color:#dc2626;font-size:1.1rem;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.pop{animation:.3s backwards popIn}@keyframes popIn{0%{transform:scale(0)}to{transform:scale(1)}}.vis-groups{flex-wrap:wrap;justify-content:center;gap:22px;display:flex}.vis-group{background:#f8fafc;border:2px dashed #cbd5e1;border-radius:12px;flex-wrap:wrap;justify-content:center;gap:5px;max-width:170px;padding:10px;display:flex}.vis-share{flex-direction:column;align-items:center;gap:10px;display:flex}.vis-baskets{font-weight:800;font-family:var(--font-fun);color:#475569;font-size:1.15rem}.vis-svg{margin:0 auto;display:block}.vis-coin{width:56px;height:56px;font-weight:800;font-family:var(--font-fun);box-shadow:var(--shadow);border:3px solid 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.1s,border-color .1s;display:flex}.option:hover:not(:disabled){border-color:var(--sky);transform:translateY(-2px)}.option-letter{width:32px;height:32px;font-family:var(--font-fun);box-shadow:var(--shadow);background:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:800;display:inline-flex}.option.right{background:#dcfce7;border-color:#22c55e}.option.right .option-letter{color:#fff;background:#22c55e}.option.wrong{background:#fee2e2;border-color:#ef4444;animation:.4s shake}.option.wrong .option-letter{color:#fff;background:#ef4444}.option.dim{opacity:.5}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-6px)}75%{transform:translate(6px)}}.btn-hint{color:#854d0e;text-align:left;font-weight:700;font-family:var(--font-body);background:#fef9c3;border-radius:12px;padding:12px 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1fr;gap:16px;margin-bottom:16px;display:grid}@media (width<=800px){.panel-grid{grid-template-columns:1fr}}.panel{border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;margin-bottom:16px;padding:20px}.panel h2{margin-bottom:6px;font-size:1.2rem}.panel-sub{color:#94a3b8;margin-bottom:14px;font-size:.82rem;font-weight:600}.panel-empty{color:#94a3b8;padding:10px 0;font-size:.9rem;font-weight:600}.panel-note{color:#94a3b8;margin-top:10px;font-size:.8rem;font-weight:600}.chart-bars{align-items:flex-end;gap:6px;display:flex}.chart-col{flex-direction:column;flex:1;align-items:center;gap:4px;display:flex}.chart-stack{align-items:flex-end;width:100%;display:flex}.chart-attempts{background:#bae6fd;border-radius:6px 6px 0 0;align-items:flex-end;width:100%;min-height:2px;display:flex}.chart-correct{background:var(--sky-dark);border-radius:6px 6px 0 0;width:100%}.chart-label{color:#94a3b8;font-size:.62rem;font-weight:700}.strand-bars{flex-direction:column;gap:12px;display:flex}.strand-bar-row{grid-template-columns:150px 1fr 48px 52px;align-items:center;gap:10px;display:grid}.strand-bar-name{font-size:.85rem;font-weight:800;font-family:var(--font-fun)}.strand-bar-track{background:var(--cloud);border-radius:99px;height:16px;overflow:hidden}.strand-bar-fill{border-radius:99px;height:100%;transition:width .6s}.strand-bar-pct{font-size:.9rem;font-weight:800}.strand-bar-n{color:#94a3b8;font-size:.72rem;font-weight:700}.topic-list{flex-direction:column;gap:8px;list-style:none;display:flex}.topic-list li{background:#f8fafc;border-radius:10px;flex-wrap:wrap;justify-content:space-between;gap:10px;padding:8px 10px;font-weight:700;display:flex}.topic-list-stats{color:#64748b;font-size:.85rem;font-weight:700}.good-text{color:#16a34a}.bad-text{color:#dc2626}.topic-table{border-collapse:collapse;width:100%;font-size:.88rem}.topic-table th{text-align:left;color:#64748b;text-transform:uppercase;letter-spacing:.04em;border-bottom:2px solid var(--cloud);padding:8px 10px;font-size:.75rem}.topic-table td{border-bottom:1px solid var(--cloud);padding:9px 10px;font-weight:600}.topic-table .row-dim{opacity:.5}.strand-chip{border-radius:99px;padding:3px 10px;font-size:.72rem;font-weight:800}.mono{color:#94a3b8;font-family:monospace;font-size:.78rem}.stars-cell{color:var(--sun);letter-spacing:.1em;font-size:1rem}.activity-list{flex-direction:column;gap:8px;list-style:none;display:flex}.activity-list li{background:#f8fafc;border-radius:10px;flex-wrap:wrap;align-items:center;gap:12px;padding:8px 10px;font-weight:700;display:flex}.activity-list li>span:nth-child(2){flex:1}.activity-date{background:var(--cloud);color:#64748b;border-radius:8px;padding:3px 9px;font-size:.75rem}.parent-foot{border-radius:var(--radius);color:#92400e;background:#fffbeb;padding:16px 20px;font-weight:600}.print-only{display:none}@media print{body{background:#fff}.no-print{display:none!important}.print-only{margin-bottom:18px;display:block}.panel,.sum-card,.results-card{box-shadow:none;border:1px solid #e2e8f0}.panel-grid{grid-template-columns:1fr 1fr}.parent-main{max-width:100%;padding:0}}@media (width<=640px){.options{grid-template-columns:1fr}.question-prompt{font-size:1.25rem}.logo{font-size:2.8rem}.row2{grid-template-columns:1fr}.strand-bar-row{grid-template-columns:110px 1fr 42px 46px}.topic-table{font-size:.75rem}.topbar{gap:8px}}