:root{--primary-50: #eff6ff;--primary-100: #dbeafe;--primary-200: #bfdbfe;--primary-300: #93c5fd;--primary-400: #60a5fa;--primary-500: #3b82f6;--primary-600: #2563eb;--primary-700: #1d4ed8;--primary-800: #1e40af;--primary-900: #1e3a8a;--primary-950: #172554;--slate-50: #f8fafc;--slate-100: #f1f5f9;--slate-200: #e2e8f0;--slate-300: #cbd5e1;--slate-400: #94a3b8;--slate-500: #64748b;--slate-600: #475569;--slate-700: #334155;--slate-800: #1e293b;--slate-900: #0f172a;--slate-950: #020617;--success-50: #f0fdf4;--success-500: #22c55e;--success-600: #16a34a;--success-700: #15803d;--warning-50: #fffbeb;--warning-500: #f59e0b;--warning-600: #d97706;--danger-50: #fef2f2;--danger-500: #ef4444;--danger-600: #dc2626;--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 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infinite}.sticker-land__cloud{position:fixed;pointer-events:none;z-index:0;opacity:.5;animation:sticker-float 8s ease-in-out infinite}.sticker-land__cloud--1{top:80px;right:40px;width:160px;height:100px;animation-delay:2s}.sticker-land__cloud--2{top:200px;left:60px;width:120px;height:80px;animation-delay:4s;opacity:.3}.sticker-land__cloud img{width:100%;height:100%;object-fit:contain}.sticker-nav{position:sticky;top:16px;z-index:50;padding:0 16px}.sticker-nav__inner{max-width:960px;margin:0 auto;background:#ffffffe6;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-radius:9999px;padding:8px 16px;box-shadow:0 8px 32px #00000014,0 0 0 4px #fffc;display:flex;align-items:center;justify-content:space-between;gap:8px}.sticker-nav__logo{display:flex;align-items:center;gap:8px;cursor:pointer}.sticker-nav__logo-img{width:48px;height:48px;object-fit:contain;transition:transform .3s;filter:drop-shadow(0 4px 3px rgba(0,0,0,.1))}.sticker-nav__logo:hover .sticker-nav__logo-img{transform:rotate(12deg)}.sticker-nav__logo-text{font-size:1.5rem;font-weight:800;color:#3b82f6;letter-spacing:-.02em;line-height:1}.sticker-nav__logo-accent{color:#f59e0b}.sticker-nav__links{display:none;gap:4px}@media(min-width:768px){.sticker-nav__links{display:flex}}.sticker-nav__link{padding:8px 20px;border-radius:16px;font-weight:800;font-size:1.1rem;color:#64748b;background:transparent;border:2px solid transparent;cursor:pointer;transition:all .2s}.sticker-nav__link:hover{background:#eff6ff;color:#3b82f6;border-color:#dbeafe}.sticker-nav__cta{background:linear-gradient(to bottom,#60a5fa,#2563eb);color:#fff;padding:10px 28px;border-radius:9999px;font-weight:800;font-size:1rem;border:none;border-bottom:4px solid #1D4ED8;box-shadow:0 4px 12px #2563eb4d;cursor:pointer;transition:all .15s}.sticker-nav__cta:hover{filter:brightness(1.1)}.sticker-nav__cta:active{transform:translateY(4px);border-bottom-width:0;box-shadow:none}.sticker-hero{max-width:960px;margin:0 auto;text-align:center;padding:40px 16px 60px;position:relative;z-index:10}.sticker-hero__badge{display:inline-block;background:#fff;padding:10px 28px;border-radius:9999px;box-shadow:0 4px 16px #0000000f;margin-bottom:28px;border:4px solid #FBCFE8;font-weight:800;font-size:1.1rem;color:#ec4899;animation:sticker-bounce 3s ease-in-out infinite}.sticker-hero__title{font-size:3.5rem;font-weight:800;color:#1e293b;margin-bottom:32px;line-height:1.15;letter-spacing:-.02em;text-shadow:0 2px 4px rgba(0,0,0,.06)}@media(min-width:768px){.sticker-hero__title{font-size:5rem}}.sticker-hero__title--blue{color:#3b82f6;display:inline-block;transition:transform .3s;cursor:default}.sticker-hero__title--blue:hover{transform:scale(1.1)}.sticker-hero__title--yellow{color:#f59e0b;display:inline-block;transition:transform .3s;cursor:default}.sticker-hero__title--yellow:hover{transform:scale(1.1)}.sticker-hero__icons{display:flex;justify-content:center;flex-wrap:wrap;gap:24px;margin-bottom:40px;padding:0 16px}@media(min-width:768px){.sticker-hero__icons{gap:48px}}.sticker-hero__icon{width:80px;height:80px;animation:sticker-float 6s ease-in-out infinite;position:relative}@media(min-width:768px){.sticker-hero__icon{width:112px;height:112px}}.sticker-hero__icon:hover{z-index:20}.sticker-hero__btn{display:inline-flex;align-items:center;gap:8px;background:#fbbf24;color:#78350f;padding:16px 40px;border-radius:2rem;font-weight:800;font-size:1.5rem;border:none;border-bottom:8px solid #D97706;box-shadow:0 8px 24px #d977064d;cursor:pointer;transition:all .15s}.sticker-hero__btn:hover{background:#fcd34d}.sticker-hero__btn:active{transform:translateY(8px);border-bottom-width:0;box-shadow:none}.sticker-grades{max-width:960px;margin:0 auto;padding:0 16px 24px;position:relative;z-index:10}.sticker-grades__inner{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;background:#ffffffb3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:24px;padding:12px 16px;box-shadow:0 4px 12px #0000000a}.sticker-grade-pill{padding:8px 20px;border-radius:9999px;font-weight:700;font-size:.9rem;border:2px solid #E2E8F0;background:#fff;color:#64748b;cursor:pointer;transition:all .2s}.sticker-grade-pill:hover{border-color:#3b82f6;color:#3b82f6}.sticker-grade-pill--active{background:#3b82f6;color:#fff;border-color:#3b82f6}.sticker-main{scroll-margin-top:30px;max-width:1100px;margin:0 auto;padding:0 24px 120px;position:relative;z-index:10}.sticker-cards{display:grid;grid-template-columns:1fr;gap:20px}@media(min-width:640px){.sticker-cards{grid-template-columns:repeat(2,1fr)}}@media(min-width:1024px){.sticker-cards{grid-template-columns:repeat(3,1fr)}}.sticker-card{background:#fff;border-radius:16px;padding:16px;box-shadow:0 10px #cbd5e1;border:4px solid white;position:relative;overflow:visible;cursor:pointer;transition:all .2s;text-align:left;display:flex;flex-direction:column}.sticker-card:hover{transform:translateY(-5px);box-shadow:0 16px #94a3b8;z-index:10}.sticker-card:active{transform:translateY(5px);box-shadow:0 4px #94a3b8}.sticker-card--active{border-color:var(--card-color, #3B82F6);box-shadow:0 10px 0 var(--card-color, #3B82F6)}.sticker-card--active:hover{box-shadow:0 16px 0 var(--card-color, #3B82F6)}.sticker-card--highlight{border-color:#fbcfe8;border-width:4px}.sticker-card--highlight:hover{border-color:#f9a8d4}.sticker-card__icon-wrap{position:absolute;top:-30px;left:16px;width:60px;height:60px}.sticker-card__icon{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 6px 4px rgba(0,0,0,.1));transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.sticker-card:hover .sticker-card__icon{transform:scale(1.12) rotate(8deg) translateY(-4px);filter:drop-shadow(0 10px 8px rgba(0,0,0,.12))}.sticker-card__label-wrap{display:flex;justify-content:flex-end;margin-top:24px;margin-bottom:8px}.sticker-card__label{padding:4px 14px;border-radius:12px;font-weight:700;font-size:.95rem;border:2px solid}.sticker-card__title{font-size:1.5rem;font-weight:800;color:#1e293b;margin-bottom:4px;transition:color .2s}.sticker-card:hover .sticker-card__title{color:var(--card-color, #3B82F6)}.sticker-card__desc{color:#64748b;font-weight:600;font-size:1rem;margin-bottom:24px;flex-grow:1}.sticker-card__btn{width:100%;text-align:center;padding:14px;border-radius:16px;font-weight:800;font-size:1.1rem;box-shadow:0 2px 8px #0000001a;border-bottom:4px solid;transition:all .15s}.sticker-card:active .sticker-card__btn{border-bottom-width:0;transform:translateY(4px)}.sticker-search{margin-top:40px;position:relative;max-width:480px}.sticker-search__icon{position:absolute;left:20px;top:50%;transform:translateY(-50%);width:20px;height:20px;color:#94a3b8}.sticker-search__input{width:100%;padding:14px 20px 14px 52px;border-radius:24px;border:4px solid #E2E8F0;background:#fff;font-size:1rem;font-weight:600;color:#334155;font-family:inherit;outline:none;transition:all 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#cbd5e1}.sticker-quiz-item:active{transform:translateY(3px);box-shadow:0 1px #cbd5e1}.sticker-quiz-item__stripe{position:absolute;top:0;left:0;right:0;height:4px;border-radius:20px 20px 0 0}.sticker-quiz-item__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.sticker-quiz-item__emoji{width:36px;height:36px;object-fit:contain;filter:drop-shadow(0 3px 2px rgba(0,0,0,.08))}.sticker-quiz-item__lock{width:16px;height:16px;color:#f59e0b}.sticker-quiz-item__title{font-size:1rem;font-weight:700;color:#1e293b;margin-bottom:8px;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.sticker-quiz-item__meta{display:flex;gap:12px;font-size:.8rem;font-weight:600;color:#94a3b8;margin-bottom:12px}.sticker-quiz-item__meta span{display:flex;align-items:center;gap:4px}.sticker-quiz-item__cta{display:flex;align-items:center;gap:4px;font-weight:800;font-size:.85rem;transition:gap .2s}.sticker-quiz-item:hover .sticker-quiz-item__cta{gap:8px}.sticker-empty{grid-column:1 / -1;text-align:center;padding:48px 16px}.sticker-empty__img{width:80px;height:80px;object-fit:contain;margin:0 auto 16px;filter:drop-shadow(0 4px 3px rgba(0,0,0,.1))}.sticker-empty__title{font-size:1.25rem;font-weight:800;color:#1e293b;margin-bottom:4px}.sticker-empty__text{color:#94a3b8;font-weight:600}@media(max-width:639px){.sticker-hero__title{font-size:2.5rem}.sticker-hero__btn{font-size:1.2rem;padding:12px 32px;border-bottom-width:6px}.sticker-nav__logo-text{font-size:1.2rem}.sticker-nav__cta{padding:8px 20px;font-size:.9rem}.sticker-land__sun{width:200px;height:200px;top:-80px;left:-80px}.sticker-land__cloud--1{width:100px;right:10px}.sticker-land__cloud--2{display:none}.sticker-card__icon-wrap{width:60px;height:60px;top:-28px}}.quiz-list-page{font-family:"Baloo 2",cursive,system-ui,sans-serif;background-color:#e0f2fe;background-image:radial-gradient(#BAE6FD 20%,transparent 20%),radial-gradient(#FEF3C7 20%,transparent 20%);background-size:60px 60px;background-position:0 0,30px 30px;background-attachment:fixed;min-height:100vh;padding:24px 16px 80px;position:relative}.quiz-list-deco{position:fixed;pointer-events:none;z-index:0;opacity:.6}.quiz-list-deco--sun{top:-100px;left:-100px;width:250px;height:250px;animation:sticker-sun-spin 60s linear infinite}.quiz-list-deco--cloud-1{top:80px;right:40px;width:140px;animation:sticker-float 8s ease-in-out infinite;animation-delay:2s}.quiz-list-deco--cloud-2{top:200px;left:60px;width:100px;animation:sticker-float 8s ease-in-out infinite;animation-delay:4s;opacity:.3}.quiz-list-container{max-width:1100px;margin:0 auto;position:relative;z-index:10}.quiz-list-breadcrumb{display:inline-flex;align-items:center;gap:8px;background:#ffffffe6;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:12px 24px;border-radius:9999px;box-shadow:0 4px 16px 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span{display:flex;align-items:center;gap:4px}.quiz-list-card__cta{display:flex;align-items:center;gap:4px;font-weight:800;font-size:.9rem;transition:gap .2s}.quiz-list-card:hover .quiz-list-card__cta{gap:8px}.quiz-list-empty{grid-column:1 / -1;text-align:center;padding:60px 16px}.quiz-list-empty__img{width:120px;height:120px;object-fit:contain;margin:0 auto 20px;filter:drop-shadow(0 4px 3px rgba(0,0,0,.1))}.quiz-list-empty__title{font-size:1.5rem;font-weight:800;color:#1e293b;margin-bottom:8px}.quiz-list-empty__text{color:#94a3b8;font-weight:600;font-size:1rem}.leaderboard-page{max-width:960px;margin:0 auto;padding:24px 16px 120px;position:relative;z-index:10}.leaderboard-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;gap:16px}.leaderboard-loading__icon{width:80px;height:80px;object-fit:contain;animation:sticker-bounce 2s ease-in-out infinite}.leaderboard-loading p{font-weight:700;color:#64748b;font-size:1.1rem}.leaderboard-header{margin-bottom:32px}.leaderboard-header__back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:12px;font-weight:700;font-size:.9rem;color:#64748b;background:#fffc;border:2px solid #E2E8F0;cursor:pointer;transition:all .2s;margin-bottom:16px}.leaderboard-header__back:hover{background:#fff;color:#3b82f6;border-color:#93c5fd}.leaderboard-header__title{display:flex;align-items:center;gap:16px}.leaderboard-header__icon{width:64px;height:64px;object-fit:contain;filter:drop-shadow(0 6px 4px rgba(0,0,0,.1));animation:sticker-float 4s ease-in-out infinite}.leaderboard-header__title h1{font-size:2rem;font-weight:800;color:#1e293b;margin:0;line-height:1.2}.leaderboard-header__title p{font-size:1rem;font-weight:600;color:#64748b;margin:4px 0 0}.leaderboard-podium{position:relative;margin-bottom:32px;padding:24px 0}@keyframes confetti-fall{0%{transform:translateY(-20px) rotate(0);opacity:1}to{transform:translateY(200px) rotate(360deg);opacity:0}}.leaderboard-podium__stage{display:flex;justify-content:center;align-items:flex-end;gap:12px;padding:0 8px}.podium-card{display:flex;flex-direction:column;align-items:center;background:#fff;border-radius:20px;padding:16px 14px 0;position:relative;transition:transform .3s;width:140px}.podium-card:hover{transform:translateY(-6px)}@media(min-width:640px){.podium-card{width:170px;padding:20px 16px 0}}.podium-card__medal,.podium-card__crown{width:40px;height:40px;object-fit:contain;margin-bottom:8px;filter:drop-shadow(0 4px 3px rgba(0,0,0,.08))}.podium-card__crown{width:48px;height:48px;animation:sticker-float 3s ease-in-out infinite}.podium-card__avatar{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.4rem;color:#fff;margin-bottom:8px;box-shadow:0 4px 12px #00000026}.podium-card__avatar--lg{width:64px;height:64px;font-size:1.7rem}.podium-card__name{font-weight:800;font-size:.95rem;color:#1e293b;text-align:center;line-height:1.2;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.podium-card__class{font-weight:600;font-size:.8rem;color:#94a3b8;margin-top:2px}.podium-card__score{display:flex;align-items:center;gap:4px;font-weight:800;font-size:1.1rem;color:#f59e0b;margin:8px 0 12px}.podium-card__star{width:20px;height:20px;object-fit:contain}.podium-card__pedestal{width:calc(100% + 28px);margin:0 -14px;text-align:center;font-weight:900;font-size:1.3rem;color:#fff;border-radius:0 0 20px 20px;padding:8px 0}@media(min-width:640px){.podium-card__pedestal{width:calc(100% + 32px);margin:0 -16px}}.podium-card__pedestal--gold{background:linear-gradient(135deg,gold,#ffa000);height:80px;display:flex;align-items:flex-start;justify-content:center;padding-top:10px;box-shadow:0 8px #b8860b}.podium-card__pedestal--silver{background:linear-gradient(135deg,silver,#9e9e9e);height:55px;display:flex;align-items:flex-start;justify-content:center;padding-top:8px;box-shadow:0 6px #757575}.podium-card__pedestal--bronze{background:linear-gradient(135deg,#cd7f32,sienna);height:40px;display:flex;align-items:flex-start;justify-content:center;padding-top:6px;box-shadow:0 4px #8b4513}.podium-card--gold{border:4px solid #FFD700;box-shadow:0 10px 30px #ffd70033;z-index:2}.podium-card--silver{border:3px solid #C0C0C0;box-shadow:0 8px 20px #c0c0c033}.podium-card--bronze{border:3px solid #CD7F32;box-shadow:0 6px 16px #cd7f3233}.leaderboard-filters{display:flex;flex-direction:column;gap:12px;margin-bottom:24px;background:#ffffffb3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:20px;padding:14px 16px;box-shadow:0 4px 12px #0000000a}@media(min-width:640px){.leaderboard-filters{flex-direction:row;align-items:center;justify-content:space-between}}.leaderboard-filters__grades{display:flex;flex-wrap:wrap;gap:6px}.leaderboard-filter-pill{padding:6px 16px;border-radius:9999px;font-weight:700;font-size:.85rem;border:2px solid #E2E8F0;background:#fff;color:#64748b;cursor:pointer;transition:all .2s}.leaderboard-filter-pill:hover{border-color:#3b82f6;color:#3b82f6}.leaderboard-filter-pill--active{background:#3b82f6;color:#fff;border-color:#3b82f6}.leaderboard-filters__time{display:flex;align-items:center;gap:6px;color:#64748b}.leaderboard-time-select{padding:6px 12px;border-radius:12px;border:2px solid 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p{font-weight:800;font-size:1.2rem;color:#1e293b;margin-bottom:4px}.leaderboard-empty span{font-weight:600;color:#94a3b8}.leaderboard-footer{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:24px;padding:12px;background:#ffffffb3;border-radius:12px;color:#64748b;font-weight:600;font-size:.9rem}.leaderboard-footer strong{color:#3b82f6}.avatar-modal{position:relative;width:100%;max-width:480px;max-height:85vh;background:#fff;border-radius:28px;padding:24px;box-shadow:0 12px #00000014,0 20px 40px #0000001f;overflow-y:auto;z-index:10}.avatar-modal__close{position:absolute;top:12px;right:12px;padding:8px;color:#94a3b8;background:none;border:none;border-radius:50%;cursor:pointer;transition:all .2s}.avatar-modal__close:hover{background:#f1f5f9;color:#475569}.avatar-modal__header{text-align:center;margin-bottom:20px}.avatar-modal__preview{width:80px;height:80px;margin:0 auto 12px;border-radius:50%;background:linear-gradient(135deg,#fff7ed,#ffedd5);border:3px solid 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