:root{--blue:#2764dc;--ink:#123b70;--sky:#6fb2f4;--card:#f8fcff;--mint:#bff2df;--gold:#ffd85c;--purple:#7058ed}*{box-sizing:border-box}body{margin:0;font-family:"Segoe UI",Tahoma,Arial,sans-serif;background:radial-gradient(circle at 20% 10%,#bfeeff 0 13%,transparent 31%),linear-gradient(135deg,#68b9f6,#7987ef);color:var(--ink);min-height:100vh}.hub-shell{width:min(1120px,94vw);margin:auto;padding:24px 0 60px}.hub-top{display:flex;align-items:center;justify-content:space-between;background:#ffffffeb;border:2px solid #fff;border-radius:28px;padding:14px 22px;box-shadow:0 9px 0 #2f70c9,0 20px 40px #174f8c38}.hub-top img{width:68px;height:68px;object-fit:contain}.hub-top a{color:var(--ink);text-decoration:none;font-weight:900;background:#e7f8ff;border-radius:18px;padding:13px 18px}.hero{text-align:center;padding:42px 12px 22px}.hero h1{font-size:clamp(2rem,5vw,3.7rem);margin:0;text-shadow:0 3px #fff}.hero p{font-size:clamp(1rem,2vw,1.35rem);font-weight:700}.hub-card{background:#f8fcfff2;border:2px solid #fff;border-radius:30px;padding:24px;margin:18px 0;box-shadow:0 10px 0 #275cb8,0 20px 45px #183a7430}.tabs{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.tabs button,.primary{border:0;border-radius:18px;padding:14px 24px;font-weight:900;font-size:1rem;color:#fff;background:linear-gradient(135deg,#237cf0,#6b55ee);box-shadow:0 6px 0 #174ead;cursor:pointer}.tabs button[aria-selected=true]{background:linear-gradient(135deg,#18b99e,#42cf83);box-shadow:0 6px 0 #087b68}.panel[hidden]{display:none}.section-title{font-size:1.6rem;margin:22px 0 12px}.sound-grid,.word-grid,.metric-grid,.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}.sound-card,.word-card,.metric,.product{border:2px solid #d6ecff;border-radius:20px;background:#fff;padding:16px;box-shadow:0 5px 0 #b8d7ee;text-align:center}.sound-card{cursor:pointer}.sound-card b{display:block;font-size:2rem;color:#5b48dd}.sound-card span{font-size:1.15rem;font-weight:800}.word-card b{display:block;font-size:1.25rem;direction:ltr}.word-card span{color:#5b4a29}.metric strong{font-size:2rem;display:block}.progress{height:14px;border-radius:20px;background:#dfeaf1;overflow:hidden;margin-top:10px}.progress i{display:block;height:100%;background:linear-gradient(90deg,#22c59b,#65d773);width:var(--p,0%)}.switch-row{display:flex;align-items:center;justify-content:space-between;padding:18px;border-bottom:1px solid #dceaf5;font-size:1.1rem;font-weight:800}.switch-row input{width:54px;height:28px}.daily-question{font-size:1.35rem;text-align:center}.daily-options{display:grid;gap:12px;margin-top:18px}.daily-options button{padding:15px;border:2px solid #b8dbf7;border-radius:16px;background:#fff;color:var(--ink);font-size:1.05rem;font-weight:800;cursor:pointer}.product h3{font-size:1.35rem}.product .emoji{font-size:3rem}.status{padding:12px;border-radius:15px;background:#dff8ed;margin-top:15px;font-weight:800}.dark body,body.dark{background:#122541;color:#eef7ff}.dark .hub-card,.dark .sound-card,.dark .word-card,.dark .metric,.dark .product,body.dark .hub-card,body.dark .sound-card,body.dark .word-card,body.dark .metric,body.dark .product{background:#19385d;color:#eef7ff;border-color:#315a87}@media(max-width:600px){.hub-shell{width:96vw;padding-top:8px}.hub-card{padding:15px;border-radius:22px}.sound-grid,.word-grid{grid-template-columns:repeat(2,1fr)}.hub-top{padding:8px 12px}.hub-top img{width:52px;height:52px}}