:root{--bg: #fffaf0;--card: #ffffff;--text: #1e293b;--muted: #64748b;--primary: #6366f1;--primary-dark: #4f46e5;--green: #16a34a;--danger: #dc2626;--border: #e2e8f0;--radius: 18px}*{box-sizing:border-box}body{margin:0;font-family:Nunito,system-ui,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--primary-dark);text-decoration:none}h1{font-size:1.9rem;margin:.4em 0 .6em}h2{font-size:1.3rem;margin:1.2em 0 .6em}.card h2{margin-top:0}.muted{color:var(--muted)}.small{font-size:.85rem}.green{color:var(--green)}.danger{color:var(--danger)!important}.grow{flex:1;min-width:0}.center{text-align:center}.center-row{justify-content:center}.loading{padding:40px;text-align:center;color:var(--muted)}.error{background:#fee2e2;color:#991b1b;padding:10px 14px;border-radius:12px;margin:10px 0}.nav{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;padding:12px 24px;background:#fff;border-bottom:3px solid #fde68a;position:sticky;top:0;z-index:10}.logo{font-size:1.5rem;font-weight:800;color:var(--text);display:inline-flex;align-items:center;gap:10px}.logo-mark{display:inline-flex;padding:7px;border-radius:10px;background:var(--primary);color:#fff}.nav-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.nav-links a,.nav-links .btn-link{color:var(--text);font-weight:600;display:inline-flex;align-items:center;gap:6px}.nav-links a.active{color:var(--primary)}.badge{background:#f43f5e;color:#fff;border-radius:99px;padding:0 7px;font-size:.8rem}.page{max-width:1100px;margin:0 auto;padding:20px 16px 60px}.page.narrow{max-width:640px}.card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:0 2px 10px #0000000f;margin-bottom:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--primary);color:#fff;border:0;border-radius:14px;padding:12px 22px;font:inherit;font-weight:800;cursor:pointer;text-align:center;box-shadow:0 4px 0 var(--primary-dark);transition:transform .1s}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(2px);box-shadow:0 2px 0 var(--primary-dark)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn.full{width:100%;margin-top:12px}.btn-green{background:#22c55e;box-shadow:0 4px #15803d}.btn-ghost{background:#eef2ff;color:var(--primary-dark);box-shadow:0 4px #c7d2fe}.small-btn{padding:8px 14px;font-size:.9rem}.btn-link{background:none;border:0;color:var(--primary-dark);font:inherit;font-weight:600;cursor:pointer;padding:4px 6px}.row-gap{display:flex;gap:12px;flex-wrap:wrap}.icon-btn{display:inline-flex;background:none;border:0;padding:6px;border-radius:10px;cursor:pointer;color:var(--muted)}.icon-btn:hover{background:#f1f5f9;color:var(--text)}.inline-icon{display:flex;align-items:center;gap:6px}.center .inline-icon{justify-content:center}.hero{text-align:center;padding:30px 0 10px}.hero h1{font-size:2.4rem}.hero p{font-size:1.15rem;color:var(--muted)}.choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:20px}.choice{border-radius:28px;padding:40px 20px;text-align:center;color:var(--text);box-shadow:0 6px #0000001a;transition:transform .15s}.choice:hover{transform:translateY(-4px) rotate(-1deg)}.choice h2{font-size:2rem;margin:10px 0 4px}.choice-icon{display:inline-flex;padding:18px;border-radius:22px;background:#fff9}.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:18px}.tile{border-radius:24px;padding:26px 10px;color:#fff;font-weight:800;font-size:1.15rem;display:flex;flex-direction:column;align-items:center;gap:6px;box-shadow:0 6px #00000026;transition:transform .15s}.tile:hover{transform:scale(1.05)}.tile-img{border-radius:24px;overflow:hidden;display:block;box-shadow:0 6px #00000026;transition:transform .15s}.tile-img:hover{transform:scale(1.05)}.tile-img img{width:100%;height:auto;display:block}.tile-big{font-size:3rem;line-height:1;display:flex;align-items:center;height:52px}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.chip{display:inline-flex;align-items:center;gap:6px;background:#fff;border:2px solid var(--border);border-radius:99px;padding:6px 14px;color:var(--text);font:inherit;font-weight:600;cursor:pointer}.chip.active{background:var(--primary);border-color:var(--primary);color:#fff}.desc-banner{background:linear-gradient(135deg,#fdf4ff,#eff6ff);border:1.5px solid #e0e7ff;border-radius:20px;padding:22px 26px;margin-bottom:26px}.desc-headline{font-size:1.15rem;font-weight:800;color:var(--primary-dark);margin:0 0 8px;line-height:1.4}.desc-body{font-size:1rem;color:var(--text);line-height:1.65;margin:0 0 4px}.desc-footer{font-size:.95rem;font-weight:700;color:var(--primary-dark);margin:10px 0 0;border-top:1.5px dashed #c7d2fe;padding-top:10px}.desc-topics{display:inline-flex;align-items:center;gap:6px;font-size:.9rem;background:#eef2ff;color:var(--primary-dark);border-radius:99px;padding:4px 14px;margin:8px 0 0;font-weight:600}.bundle-hero{display:flex;gap:32px;align-items:flex-start;padding:0;overflow:hidden;margin-top:20px}.bundle-img{width:260px;flex-shrink:0;display:block;object-fit:cover;object-position:center top;border-radius:0;align-self:stretch}@media(max-width:700px){.bundle-hero{flex-direction:column}.bundle-img{width:100%;max-height:260px}}.bundle-info{flex:1;padding:28px 28px 28px 0;display:flex;flex-direction:column;gap:10px;min-width:0}.bundle-label{font-size:1.5rem;font-weight:900;color:var(--primary-dark);letter-spacing:-.5px}.bundle-headline{font-size:1.05rem;font-weight:800;color:var(--text);margin:0;line-height:1.4}.bundle-body{font-size:.97rem;color:var(--muted);line-height:1.65;margin:0}.bundle-topics{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}.bundle-price{font-size:2rem;font-weight:900;color:var(--green);margin-top:6px;display:flex;align-items:baseline;gap:8px}.bundle-price-note{font-size:.9rem;font-weight:600;color:var(--muted);background:#f1f5f9;border-radius:99px;padding:2px 10px}.bundle-btn{margin-top:6px;align-self:flex-start;font-size:1rem}.bundle-btn:disabled{background:var(--green);box-shadow:0 4px #15803d;opacity:1;cursor:default}.suggestions-section{margin-top:36px}.suggestions-title{font-size:1.25rem;font-weight:800;color:var(--primary-dark);margin:0 0 16px;letter-spacing:-.3px}.suggestions-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}.suggestion-card{display:flex;flex-direction:column;overflow:hidden;padding:0;color:var(--text);text-decoration:none;transition:transform .15s,box-shadow .15s}.suggestion-card:hover{transform:translateY(-5px);box-shadow:0 10px 28px #0000001f}.suggestion-img{width:100%;height:140px;object-fit:cover;object-position:center top;display:block}.suggestion-body{padding:12px 14px 14px;display:flex;flex-direction:column;gap:6px}.suggestion-label{font-size:.97rem;font-weight:800;color:var(--primary-dark);line-height:1.3}.suggestion-desc{font-size:.82rem;color:var(--muted);line-height:1.5;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.suggestion-topics{display:flex;gap:5px;flex-wrap:wrap}.suggestion-price{font-size:1rem;font-weight:800;color:var(--green);margin-top:2px}.pill-sm{font-size:.72rem;padding:2px 8px}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px}.product-card{padding:0;overflow:hidden;color:var(--text);transition:transform .15s}.product-card:hover{transform:translateY(-4px)}.product-card .pimg{width:100%;height:190px;object-fit:cover;object-position:center top;border-radius:0}.product-card-body{padding:14px 16px}.product-card h3{margin:0 0 4px;font-size:1.05rem}.price{font-weight:800;color:var(--green);margin-top:6px}.price.big{font-size:1.8rem;margin:12px 0}.pimg{display:flex;align-items:center;justify-content:center;object-fit:cover;border-radius:14px;flex-shrink:0;color:#fff}.pimg-md{height:190px}.pimg-lg{width:280px;height:320px;object-fit:cover;border-radius:18px}.pimg-sm{width:56px;height:56px;object-fit:cover}.pimg-xs{width:36px;height:36px;object-fit:cover;border-radius:8px}.pimg-md .pimg-icon{width:56px;height:56px}.pimg-lg .pimg-icon{width:104px;height:104px}.pimg-sm .pimg-icon{width:26px;height:26px}.pimg-xs .pimg-icon{width:18px;height:18px}.product-detail{display:flex;gap:28px;flex-wrap:wrap}.product-info{flex:1;min-width:260px}.product-info h1{margin-top:0}.pills{display:flex;gap:8px}.pill{background:#f1f5f9;border-radius:99px;padding:4px 12px;font-weight:600;font-size:.9rem;white-space:nowrap}.solve-box{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}.cart-row{display:flex;align-items:center;gap:14px;padding:10px 0;border-bottom:1px solid var(--border)}.cart-total,.line{display:flex;justify-content:space-between;padding:8px 0}.cart-total{font-size:1.2rem}.line.total{font-size:1.3rem;font-weight:800;border-top:2px solid var(--border);margin-top:6px}.checkout-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px;align-items:start}@media(max-width:800px){.checkout-grid{grid-template-columns:1fr}}.coupon-row{display:flex;gap:8px;margin:14px 0}.coupon-row input{flex:1}.student-options{display:grid;gap:8px;margin-bottom:12px}.radio-card{display:flex;align-items:center;gap:10px;border:2px solid var(--border);border-radius:14px;padding:12px;cursor:pointer;font-weight:600}.radio-card.active{border-color:var(--primary);background:#eef2ff}.result-badge-wrap{display:flex;flex-direction:column;align-items:center}.result-label{font-size:2rem;font-weight:800;color:var(--primary-dark);margin:4px 0}.result-icon{width:88px;height:88px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;margin:12px 0 8px;box-shadow:0 4px 14px #0000001f}@keyframes trophyBounce{0%{transform:scale(.3) rotate(-12deg);opacity:0}50%{transform:scale(1.22) rotate(6deg)}70%{transform:scale(.92) rotate(-3deg)}to{transform:scale(1) rotate(0);opacity:1}}@keyframes trophyGlow{0%,to{box-shadow:0 0 20px #eab30873,0 0 45px #eab30840}50%{box-shadow:0 0 35px #eab308bf,0 0 65px #eab30873}}@keyframes starPop{0%{transform:scale(0);opacity:0}60%{transform:scale(1.4);opacity:1}to{transform:scale(1);opacity:1}}@keyframes labelSlide{0%{transform:translateY(12px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes tagPulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.icon-bounce{animation:trophyBounce .7s cubic-bezier(.34,1.56,.64,1) forwards,trophyGlow 2.2s infinite ease-in-out}.stars-row{display:flex;gap:10px;justify-content:center;margin:4px 0 6px;font-size:2.2rem;line-height:1}.star-sparkle{display:inline-block}.star-sparkle.star-active{color:#f59e0b;text-shadow:0 2px 10px rgba(245,158,11,.6);animation:starPop .5s cubic-bezier(.34,1.56,.64,1) both}.star-sparkle.star-inactive{color:#cbd5e1}.label-pop{animation:labelSlide .5s ease-out .2s both}.high-score-tag{background:linear-gradient(135deg,#f59e0b,#ef4444);color:#fff;font-weight:800;font-size:.92rem;padding:6px 18px;border-radius:99px;margin:8px 0 12px;letter-spacing:.5px;box-shadow:0 4px 15px #f59e0b66;animation:tagPulse 1.8s infinite ease-in-out}.form{display:flex;flex-direction:column;gap:12px}.form label{display:flex;flex-direction:column;gap:4px;font-weight:600;font-size:.95rem}.form label.check{flex-direction:row;align-items:center;gap:8px}.row{display:flex;gap:12px;flex-wrap:wrap}.row>label{flex:1;min-width:140px}.align-center{align-items:center}input,select,textarea{font:inherit;padding:10px 12px;border:2px solid var(--border);border-radius:12px;background:#fff;color:var(--text)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary)}.tabs{display:flex;gap:6px;background:#f1f5f9;padding:4px;border-radius:14px}.tabs button{flex:1;border:0;background:none;padding:10px;border-radius:10px;font:inherit;font-weight:700;cursor:pointer;color:var(--muted)}.tabs button.active{background:#fff;color:var(--text);box-shadow:0 1px 4px #0000001a}.modal-bg{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a80;display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}.modal{background:#fff;border-radius:var(--radius);padding:24px;width:100%;max-width:420px;max-height:90vh;overflow:auto}.modal.wide{max-width:760px}.modal-head{display:flex;justify-content:space-between;align-items:center}.modal-head h2{margin:0}.play-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}.progress-bar{height:14px;background:#e2e8f0;border-radius:99px;overflow:hidden;margin-bottom:16px}.progress-bar div{height:100%;background:linear-gradient(90deg,#22c55e,#84cc16);transition:width .3s}.progress-bar.thin{height:8px;margin:6px 0 0}.question{text-align:center;padding:40px 20px}.question-text{font-size:2.6rem;font-weight:800;margin-bottom:30px;line-height:1.5;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px}.options{display:grid;grid-template-columns:1fr 1fr;gap:14px}.option{font:inherit;font-size:1.6rem;font-weight:800;padding:18px;border-radius:18px;border:0;cursor:pointer;background:#fef3c7;box-shadow:0 5px #fcd34d;color:var(--text);display:flex;align-items:center;justify-content:center}.option:nth-child(2){background:#dbeafe;box-shadow:0 5px #93c5fd}.option:nth-child(3){background:#dcfce7;box-shadow:0 5px #86efac}.option:nth-child(4){background:#fce7f3;box-shadow:0 5px #f9a8d4}.option:active{transform:translateY(3px)}.answer-row{display:flex;gap:12px;align-items:center;padding:6px 0;border-bottom:1px solid var(--border)}.frac-display{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;margin:0 3px;line-height:1.1}.frac-num{font-size:.72em;font-weight:800;padding:0 4px 2px;border-bottom:2.5px solid currentColor;display:block;text-align:center;min-width:1.2em}.frac-den{font-size:.72em;font-weight:800;padding:2px 4px 0;display:block;text-align:center;min-width:1.2em}.frac-line{display:none}.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px;margin-bottom:10px}.stat{background:#fff;border-radius:var(--radius);padding:18px;box-shadow:0 2px 10px #0000000f;color:var(--muted);font-weight:600}.stat span{display:block;font-size:1.6rem;font-weight:800;color:var(--text)}.app-progress-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:14px}.app-progress{display:flex;align-items:center;gap:12px;margin:0}.table-wrap{overflow-x:auto;padding:8px 16px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--border);font-size:.95rem;vertical-align:middle}th{color:var(--muted);font-weight:700;font-size:.85rem;text-transform:uppercase}tr.dim td{opacity:.55}td.actions{white-space:nowrap}.status{padding:2px 10px;border-radius:99px;font-size:.8rem;font-weight:700;background:#f1f5f9}.status.paid{background:#dcfce7;color:#166534}.status.pending{background:#fef9c3;color:#854d0e}.status.failed{background:#fee2e2;color:#991b1b}.admin{display:flex;min-height:calc(100vh - 64px)}.sidebar{width:230px;background:#fff;border-right:1px solid var(--border);padding:16px 10px;display:flex;flex-direction:column;gap:4px;flex-shrink:0}.sidebar a{padding:10px 14px;border-radius:12px;color:var(--text);font-weight:600;display:flex;align-items:center;gap:10px}.sidebar a svg{color:var(--muted);flex-shrink:0}.sidebar a.active svg{color:var(--primary-dark)}.sidebar a.active{background:#eef2ff;color:var(--primary-dark)}.admin-main{flex:1;padding:20px 28px;min-width:0}.title-row{display:flex;justify-content:space-between;align-items:center;gap:12px}@media(max-width:760px){.admin{flex-direction:column}.sidebar{width:auto;flex-direction:row;overflow-x:auto;border-right:0;border-bottom:1px solid var(--border)}.sidebar a{white-space:nowrap}.admin-main{padding:16px}.pimg-lg{width:100%}}