.streak-badge{display:inline-block;background:var(--gradient-gold);color:var(--color-white);font-family:Fredoka,sans-serif;font-size:1.25rem;font-weight:700;padding:10px 24px;border-radius:var(--radius-pill);box-shadow:0 2px 12px #ffd16680}.grade-card{display:flex;flex-direction:column;align-items:center;text-align:center;padding:var(--space-4);width:100%;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,filter .15s ease;background:var(--color-white);border-radius:var(--radius-md);box-shadow:0 4px 24px #c89aff2e;border:1.5px solid rgba(200,154,255,.2)}.grade-card:hover{transform:translateY(-4px) scale(1.02);box-shadow:0 10px 32px #c89aff59;filter:brightness(1.02)}.grade-card:active{transform:scale(.97)}.grade-card__emoji{font-size:3.5rem;line-height:1;margin-bottom:var(--space-2)}.grade-card__title{font-family:Fredoka,sans-serif;font-size:1.75rem;font-weight:600;color:var(--color-purple);margin-bottom:var(--space-2)}.grade-card__progress-track{width:100%;height:12px;border-radius:var(--radius-pill);background:#c89aff33;margin-bottom:var(--space-1);overflow:hidden}.grade-card__progress-fill{height:100%;border-radius:var(--radius-pill);background:var(--gradient-progress);transition:width .5s ease}.grade-card__count{font-family:Nunito,sans-serif;font-size:.95rem;font-weight:700;color:#5c3d8f99;margin-bottom:var(--space-2)}.grade-card__cta{font-family:Nunito,sans-serif;font-size:1rem;font-weight:800;color:var(--color-lavender)}.home-page__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-2);flex-wrap:wrap;gap:var(--space-2)}.home-page__title{font-family:Fredoka,sans-serif;font-size:2.5rem;font-weight:700;color:var(--color-purple)}.home-page__subtitle{font-family:Nunito,sans-serif;font-size:1.1rem;font-weight:600;color:#5c3d8fb3;margin-bottom:var(--space-4)}.home-page__grade-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:var(--space-3)}.home-page--loading{display:flex;justify-content:center;align-items:center;min-height:60vh;font-family:Fredoka,sans-serif;font-size:1.5rem;color:var(--color-purple)}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.06)}}.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,48px);gap:6px;justify-content:center;margin:var(--space-2) 0}.lesson-cell{width:48px;height:48px;border-radius:var(--radius-cell);font-family:Nunito,sans-serif;font-size:.85rem;font-weight:700;border:none;cursor:pointer;transition:transform .1s ease}.lesson-cell--completed{background:linear-gradient(135deg,#c89aff,#ff85c8,#ffd166,#a8edba);color:var(--color-white)}.lesson-cell--completed:hover{transform:scale(1.08)}.lesson-cell--next{background:var(--gradient-unicorn);color:var(--color-white);animation:pulse 1.2s ease-in-out infinite;box-shadow:0 2px 10px #c89aff80}.lesson-cell--locked{background:#c89aff1f;color:#5c3d8f4d;cursor:default}.grade-section{margin-bottom:var(--space-4)}.grade-section__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-2)}.grade-section__title{font-family:Fredoka,sans-serif;font-size:1.75rem;font-weight:600;color:var(--color-purple);display:flex;align-items:center;gap:var(--space-1)}.grade-section__count{font-family:Nunito,sans-serif;font-size:1rem;font-weight:700;color:#5c3d8f99}.grade-section__progress-track{height:14px;border-radius:var(--radius-pill);background:#c89aff33;margin-bottom:var(--space-2);overflow:hidden}.grade-section__progress-fill{height:100%;border-radius:var(--radius-pill);background:var(--gradient-progress);transition:width .5s ease}.grade-section__action{display:flex;justify-content:center;margin-top:var(--space-3)}.grade-section__complete-msg{font-family:Fredoka,sans-serif;font-size:1.5rem;font-weight:600;color:var(--color-purple)}.grade-page__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-3);flex-wrap:wrap;gap:var(--space-2)}.grade-page__title{font-family:Fredoka,sans-serif;font-size:2rem;font-weight:700;color:var(--color-purple);margin-bottom:var(--space-3)}.grade-page--loading{display:flex;justify-content:center;align-items:center;min-height:60vh;font-family:Fredoka,sans-serif;font-size:1.5rem;color:var(--color-purple)}.problem-display{text-align:center}.problem-display__counter{font-family:Nunito,sans-serif;font-size:1rem;font-weight:600;color:#5c3d8f99;margin-bottom:var(--space-2)}.problem-display__prompt{font-family:Fredoka,sans-serif;font-size:3rem;font-weight:600;color:var(--color-purple);line-height:1.2;white-space:nowrap}@media (max-width: 600px){.problem-display__prompt{font-size:3.5rem}}.answer-input{display:flex;flex-direction:column;align-items:center;gap:var(--space-2)}.answer-input__field{font-family:Fredoka,sans-serif;font-size:2.5rem;font-weight:600;text-align:center;width:160px;padding:12px 16px;border:3px solid var(--color-lavender);border-radius:var(--radius-sm);background:var(--color-white);color:var(--color-purple);outline:none;transition:border-color .15s ease,box-shadow .15s ease;-moz-appearance:textfield}.answer-input__field::-webkit-outer-spin-button,.answer-input__field::-webkit-inner-spin-button{-webkit-appearance:none}.answer-input__field:focus{border-color:var(--color-pink);box-shadow:0 0 0 4px #ff85c840}.answer-input__field:disabled{opacity:.5}.answer-input__submit{min-width:160px}@media (max-width: 600px){.answer-input{width:100%}.answer-input__field{width:100%;font-size:3rem}.answer-input__submit{width:100%}}@keyframes popIn{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.feedback{display:flex;flex-direction:column;align-items:center;gap:var(--space-1);border-radius:var(--radius-md);padding:var(--space-4);text-align:center}.feedback--correct{background:#a8edbaf2;animation:popIn .2s ease-out}.feedback--wrong{background:#ffe4f3f2;animation:shake .4s ease-in-out}.feedback__emoji{font-size:5rem;line-height:1}.feedback--wrong .feedback__emoji{font-size:3rem}.feedback__message{font-family:Fredoka,sans-serif;font-size:2rem;font-weight:600;color:var(--color-purple)}.feedback--wrong .feedback__message{font-family:Nunito,sans-serif;font-size:1.25rem;font-weight:700}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.lesson-complete{background:var(--gradient-unicorn);border-radius:var(--radius-md);padding:var(--space-5) var(--space-4);text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-3)}.lesson-complete__emojis{font-size:4rem;animation:bounce 1.4s ease-in-out infinite}.lesson-complete__title{font-family:Fredoka,sans-serif;font-size:2.5rem;font-weight:700;color:var(--color-white)}.lesson-complete__streak{font-family:Fredoka,sans-serif;font-size:2rem;font-weight:700;color:var(--color-white)}.lesson-complete__unlock{display:flex;align-items:center;gap:var(--space-1);background:var(--gradient-gold);color:var(--color-white);font-family:Fredoka,sans-serif;font-size:1.5rem;font-weight:700;padding:14px 28px;border-radius:var(--radius-md);box-shadow:0 2px 12px #ffd16680}.lesson-complete .btn-secondary{color:var(--color-white);border-color:var(--color-white)}.lesson-complete .btn-secondary:hover{background:#fff3}.lesson-page__nav{display:flex;align-items:center;gap:var(--space-2);margin-bottom:var(--space-3)}.lesson-page__lesson-title{font-family:Fredoka,sans-serif;font-size:1.25rem;font-weight:600;color:var(--color-purple)}@media (max-width: 600px){.lesson-page__nav{flex-direction:column;align-items:flex-start;gap:var(--space-1);margin-bottom:var(--space-2)}.lesson-page__lesson-title{font-size:1.1rem;padding-left:2px}}.lesson-page__card{max-width:900px;margin:0 auto;min-height:320px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-3)}@media (max-width: 600px){.lesson-page__card{min-height:0;padding:var(--space-4) var(--space-3);gap:var(--space-4)}}.lesson-page__locked{max-width:420px;margin:var(--space-5) auto;text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-3)}.lesson-page__locked-emoji{font-size:4rem}.lesson-page__locked h2{font-family:Fredoka,sans-serif;font-size:2rem;color:var(--color-purple)}.lesson-page__locked p{font-size:1rem;color:#5c3d8fb3}.lesson-page--loading{display:flex;justify-content:center;align-items:center;min-height:60vh;font-family:Fredoka,sans-serif;font-size:1.5rem;color:var(--color-purple)}:root{--color-lavender: #C89AFF;--color-pink: #FF85C8;--color-gold: #FFD166;--color-gold-dark: #FFB347;--color-sky: #85DEFF;--color-mint: #A8EDBA;--color-blush: #FFE4F3;--color-purple: #5C3D8F;--color-white: #FFFFFF;--gradient-unicorn: linear-gradient(135deg, #C89AFF, #FF85C8);--gradient-gold: linear-gradient(135deg, #FFD166, #FFB347);--gradient-progress: linear-gradient(90deg, #C89AFF, #FF85C8, #FFD166);--gradient-page: linear-gradient(160deg, #FDF0FF 0%, #FFF0F8 100%);--radius-sm: 16px;--radius-md: 24px;--radius-pill: 999px;--radius-cell: 12px;--space-1: 8px;--space-2: 16px;--space-3: 24px;--space-4: 32px;--space-5: 48px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:Nunito,sans-serif;background:var(--gradient-page);background-attachment:fixed;color:var(--color-purple);min-height:100vh}h1,h2,h3{font-family:Fredoka,sans-serif}button{cursor:pointer;font-family:Nunito,sans-serif;border:none}.btn-primary{background:var(--gradient-unicorn);color:var(--color-white);font-family:Nunito,sans-serif;font-size:1.25rem;font-weight:800;padding:16px 40px;border-radius:var(--radius-pill);border:none;box-shadow:0 4px 16px #c89aff73;transition:filter .15s ease,box-shadow .15s ease,transform .1s ease}.btn-primary:hover:not(:disabled){filter:brightness(1.08);box-shadow:0 6px 20px #c89aff8c}.btn-primary:active:not(:disabled){transform:scale(.97)}.btn-primary:disabled{opacity:.45;cursor:default}.btn-secondary{background:transparent;color:var(--color-lavender);font-family:Nunito,sans-serif;font-size:1rem;font-weight:700;padding:10px 28px;border-radius:var(--radius-pill);border:2.5px solid var(--color-lavender);transition:background .15s ease}.btn-secondary:hover{background:#c89aff1f}.card{background:var(--color-white);border-radius:var(--radius-md);padding:var(--space-3);box-shadow:0 4px 24px #c89aff2e;border:1.5px solid rgba(200,154,255,.2)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.page{max-width:900px;margin:0 auto;padding:var(--space-3);animation:fadeIn .2s ease}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-3)}.login-card{background:var(--color-white);border-radius:24px;padding:48px 40px;text-align:center;box-shadow:0 4px 24px #c89aff2e;border:1.5px solid rgba(200,154,255,.2);max-width:360px;width:100%}.login-logo{font-size:4rem;margin-bottom:var(--space-2)}.login-title{font-family:Fredoka,sans-serif;font-size:2.5rem;font-weight:700;color:var(--color-deep-purple);margin:0 0 var(--space-1)}.login-subtitle{font-family:Nunito,sans-serif;font-size:1rem;font-weight:600;color:var(--color-deep-purple);margin:0 0 var(--space-4)}.login-button-wrapper{display:flex;justify-content:center}