@import "https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Nunito:wght@700;800;900&display=swap";:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}:root{--sky-bg:linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f1f5f9 100%);--sky-top:#e0f2fe;--grass-green:#38bdf8;--grass-dark:#0284c7;--primary:#4f46e5;--primary-pop:#6366f1;--accent-yellow:#ffd54f;--accent-orange:#ff7043;--success-green:#66bb6a;--purple-pop:#9c27b0;--card-bg:#fff;--card-radius:28px;--card-shadow:0 12px 0 #00000014, 0 20px 30px #0000000f;--text-main:#1e293b;--text-muted:#64748b;--font-family:"Fredoka", "Nunito", -apple-system, sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;touch-action:manipulation;margin:0;padding:0}html,body,#root{width:100%;height:100%;font-family:var(--font-family);background:var(--sky-bg);color:var(--text-main);-webkit-font-smoothing:antialiased;overflow:hidden}.mobile-app-shell{background:var(--sky-bg);flex-direction:column;width:100vw;height:100vh;display:flex;position:relative;overflow:hidden}.cloud-header-bg{opacity:.45;pointer-events:none;z-index:1;background-image:radial-gradient(25px at 20px 30px,#fff 99%,#0000 0),radial-gradient(35px at 60px 20px,#fff 99%,#0000 0),radial-gradient(30px at 110px 30px,#fff 99%,#0000 0),radial-gradient(25px at 80% 25px,#fff 99%,#0000 0),radial-gradient(35px at 85% 15px,#fff 99%,#0000 0);height:60px;position:absolute;top:10px;left:0;right:0}.native-header{-webkit-backdrop-filter:blur(12px);z-index:20;background:#ffffffe0;border-bottom:3px solid #ffffffe6;justify-content:space-between;align-items:center;height:68px;padding:0 20px;display:flex;box-shadow:0 4px 16px #0000000f}.header-brand{align-items:center;gap:10px;display:flex}.avatar-badge{background:#fff;border:2px solid #cbd5e1;border-radius:30px;align-items:center;gap:8px;padding:4px 14px 4px 6px;display:flex;box-shadow:0 4px #e2e8f0}.avatar-badge-text{color:var(--text-main);white-space:nowrap;font-size:1.05rem;font-weight:700}@media (width<=599px){.native-header{padding:0 12px}.avatar-badge{gap:6px;padding:3px 10px 3px 5px}.avatar-badge img{width:26px!important;height:26px!important}.avatar-badge-text{font-size:.85rem}}.pill-btn{height:42px;color:var(--primary-pop);cursor:pointer;background:#fff;border:2px solid #e2e8f0;border-radius:24px;align-items:center;gap:6px;padding:0 16px;font-size:.95rem;font-weight:700;transition:transform .12s;display:flex;box-shadow:0 4px #cbd5e1}.pill-btn:active{transform:translateY(3px);box-shadow:0 1px #cbd5e1}.app-screen-body{z-index:5;scrollbar-width:none;flex-direction:column;flex:1;padding:20px;display:flex;position:relative;overflow-y:auto}.app-screen-body::-webkit-scrollbar{display:none}.section-header-box{text-align:center;margin-bottom:20px}.section-title{color:#0277bd;text-shadow:0 2px 4px #0277bd1f;letter-spacing:-.5px;font-size:2.2rem;font-weight:800}.section-subtitle{color:#0288d1;margin-top:2px;font-size:1.1rem;font-weight:700}.native-table-grid{grid-template-columns:repeat(2,1fr);gap:16px;padding-bottom:20px;display:grid}@media (width>=600px){.native-table-grid{grid-template-columns:repeat(3,1fr);gap:20px}}@media (width>=900px){.native-table-grid{grid-template-columns:repeat(5,1fr);gap:24px}}.native-table-card{cursor:pointer;background:#fff;border:3px solid #e0f7fa;border-radius:28px;flex-direction:column;justify-content:center;align-items:center;padding:22px 16px;transition:transform .12s,box-shadow .12s;display:flex;position:relative;box-shadow:0 8px #29b6f6,0 16px 24px #00000014}.native-table-card:active{transform:translateY(6px);box-shadow:0 2px #29b6f6,0 6px 12px #00000014}.card-table-number{color:#0288d1;font-size:3rem;font-weight:700;line-height:1.1}.card-status-pill{color:#0288d1;background:#e1f5fe;border-radius:20px;margin-top:8px;padding:5px 14px;font-size:.85rem;font-weight:700}.card-status-pill.mastered{color:#33691e;background:#dcedc8}.sheet-backdrop{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:100;background:#0f172a8c;justify-content:center;align-items:flex-end;padding-bottom:88px;display:flex;position:fixed;inset:0}@media (width>=600px){.sheet-backdrop{align-items:center;padding:24px}}.sheet-card{background:#fff;border-top-left-radius:36px;border-top-right-radius:36px;width:100%;max-width:520px;max-height:calc(100vh - 88px);padding:32px 24px 40px;overflow-y:auto;box-shadow:0 -10px 40px #0003}@media (width>=600px){.sheet-card{border-radius:36px;max-height:calc(100vh - 48px)}}.sheet-handle{background:#e2e8f0;border-radius:3px;width:48px;height:6px;margin:0 auto 20px}.sheet-title{text-align:center;color:var(--text-main);font-size:1.8rem;font-weight:700}.sheet-subtitle{color:var(--text-muted);text-align:center;margin-bottom:24px;font-size:1.05rem}.sheet-actions{flex-direction:column;gap:16px;display:flex}.action-btn-large{cursor:pointer;border:none;border-radius:32px;justify-content:center;align-items:center;gap:12px;width:100%;height:64px;font-size:1.2rem;font-weight:700;transition:transform .12s;display:flex}.action-btn-large.primary{color:#fff;background:#8bc34a;box-shadow:0 6px #558b2f}.action-btn-large.primary:active{transform:translateY(4px);box-shadow:0 2px #558b2f}.action-btn-large.secondary{color:#fff;background:#29b6f6;box-shadow:0 6px #0288d1}.action-btn-large.secondary:active{transform:translateY(4px);box-shadow:0 2px #0288d1}.guided-container{flex-direction:column;justify-content:flex-start;width:100%;max-width:640px;margin:0 auto;display:flex}.quiz-screen-card{width:100%;max-width:640px;box-shadow:var(--card-shadow);background:#fff;border-radius:36px;flex-direction:column;flex:1;align-items:center;margin:0 auto;padding:28px 24px;display:flex;position:relative}.progress-bar-track{background:#e1f5fe;border:2px solid #b3e5fc;border-radius:12px;width:100%;height:14px;margin-bottom:20px;overflow:hidden}.progress-bar-fill{background:linear-gradient(90deg,#29b6f6,#0288d1);border-radius:10px;height:100%;transition:width .3s}.quiz-header-row{justify-content:space-between;align-items:center;width:100%;margin-bottom:16px;display:flex}.quiz-badge{color:#f57f17;background:#fff9c4;border:2px solid #fff176;border-radius:20px;padding:6px 18px;font-size:1rem;font-weight:700}.problem-text-large{color:#0288d1;letter-spacing:2px;margin:10px 0 24px;font-size:4rem;font-weight:700}@media (width>=768px){.problem-text-large{font-size:5rem}}.answer-box{color:#0288d1;border-bottom:6px solid #0288d1;justify-content:center;align-items:center;min-width:100px;height:80px;padding:0 16px;display:inline-flex}.native-mc-grid{grid-template-columns:repeat(2,1fr);gap:18px;width:100%;margin-top:10px;display:grid}.native-mc-btn{color:#0288d1;cursor:pointer;background:#fff;border:3px solid #e1f5fe;border-radius:42px;justify-content:center;align-items:center;height:84px;font-size:2.4rem;font-weight:700;transition:transform .12s,box-shadow .12s;display:flex;box-shadow:0 8px #b3e5fc}.native-mc-btn:active{background:#e1f5fe;transform:translateY(6px);box-shadow:0 2px #b3e5fc}.native-keypad-grid{grid-template-columns:repeat(3,1fr);gap:14px;width:100%;max-width:440px;margin-top:auto;display:grid}.native-key-btn{height:64px;color:var(--text-main);cursor:pointer;background:#f8fafc;border:2px solid #e2e8f0;border-radius:24px;justify-content:center;align-items:center;font-size:1.9rem;font-weight:700;display:flex;box-shadow:0 5px #cbd5e1}.native-key-btn:active{transform:translateY(4px);box-shadow:0 1px #cbd5e1}.native-key-btn.action{color:var(--text-muted);font-size:1.15rem}.native-key-btn.submit{color:#fff;background:#8bc34a;border:none;border-radius:30px;grid-column:span 3;height:62px;margin-top:4px;font-size:1.35rem;font-weight:700;box-shadow:0 6px #558b2f}.native-key-btn.submit:active{transform:translateY(4px);box-shadow:0 2px #558b2f}.native-tab-bar{-webkit-backdrop-filter:blur(20px);z-index:20;background:#fffffff0;border:2px solid #ffffffe6;border-radius:28px;justify-content:space-around;align-items:center;height:64px;margin:0 16px 12px;padding:4px;display:flex;box-shadow:0 8px 24px #00000014}@media (width>=768px){.native-tab-bar{border-radius:32px;max-width:540px;height:72px;margin:0 auto 16px;box-shadow:0 12px 30px #0000001a}}.tab-item{color:#64748b;cursor:pointer;background:0 0;border:none;border-radius:22px;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;height:100%;font-size:.85rem;font-weight:800;display:flex;position:relative}.tab-item.active{color:#0288d1}.active-pill-indicator{z-index:1;background:#e1f5fe;border:none;border-radius:22px;position:absolute;inset:0}.mascot-banner{justify-content:center;align-items:center;gap:12px;margin-top:10px;display:flex;position:relative}.speech-bubble{color:var(--text-main);background:#fff;border-radius:18px;padding:8px 16px;font-size:.95rem;font-weight:700;position:relative;box-shadow:0 4px #cbd5e1}.speech-bubble:before{content:"";border:6px solid #0000;border-left-width:0;border-right:8px solid #fff;position:absolute;top:50%;left:-8px;transform:translateY(-50%)}.modal-backdrop{-webkit-backdrop-filter:blur(10px);z-index:200;background:#0f172aa6;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.hint-modal-card{text-align:center;background:#fff;border-radius:36px;flex-direction:column;align-items:center;width:100%;max-width:480px;padding:32px 28px;display:flex;box-shadow:0 20px 60px #0000004d,0 0 0 4px #fff9c4}.hint-icon{margin-bottom:8px;font-size:3.5rem;line-height:1}.hint-title{color:#0288d1;margin-bottom:12px;font-size:1.7rem;font-weight:700}.hint-text{color:var(--text-main);background:#f0f9ff;border:2px solid #bae6fd;border-radius:20px;width:100%;margin-bottom:16px;padding:16px;font-size:1.15rem;font-weight:600;line-height:1.5}.hint-strategy{color:#d97706;background:#fef3c7;border:2px solid #fde68a;border-radius:16px;width:100%;margin-bottom:20px;padding:10px 18px;font-size:1.1rem;font-weight:700}.dashboard-container{flex-direction:column;gap:20px;width:100%;max-width:860px;margin:0 auto;padding-bottom:24px;display:flex}.dash-card{box-shadow:var(--card-shadow);background:#fff;border:2px solid #e1f5fe;border-radius:28px;padding:24px}.dash-title{color:#0288d1;margin-bottom:8px;font-size:1.6rem;font-weight:700}.matrix-grid-10x10{grid-template-columns:repeat(10,1fr);gap:6px;margin-top:12px;display:grid}@media (width<=599px){.matrix-grid-10x10{grid-template-columns:repeat(5,1fr);gap:8px}.matrix-cell{font-size:.95rem}}.matrix-cell{aspect-ratio:1;color:#fff;cursor:pointer;border-radius:10px;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;transition:transform .1s;display:flex;box-shadow:0 3px #0000001f}.matrix-cell:active{transform:scale(.92)}.tier-1{background:#ff7043;border:1px solid #e64a19}.tier-2{background:#ffa726;border:1px solid #f57c00}.tier-3{background:#42a5f5;border:1px solid #1976d2}.tier-4{background:#66bb6a;border:1px solid #388e3c}@keyframes countdown-bar-shrink{0%{transform:scaleX(1)}to{transform:scaleX(0)}}