.aictaw-challenge{max-width:1200px;margin:0 auto;padding:30px}.challenge-hero{background:linear-gradient(135deg,#0f172a,#1d4ed8,#06b6d4);color:#fff;padding:40px;border-radius:24px;margin-bottom:30px;box-shadow:0 15px 40px rgb(0 0 0 / .15)}.challenge-hero h6{letter-spacing:2px;margin-bottom:10px;opacity:.9}.challenge-hero h1{font-size:42px;margin-bottom:15px;color:#fff}.challenge-hero p{font-size:16px;line-height:1.8;max-width:850px}.challenge-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:25px}.challenge-meta span{background:rgb(255 255 255 / .15);padding:10px 16px;border-radius:50px;font-size:14px;backdrop-filter:blur(8px)}.challenge-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:25px}.challenge-summary{margin-bottom:35px}.challenge-stat{background:#fff;border-radius:20px;padding:25px;text-align:center;box-shadow:0 10px 30px rgb(0 0 0 / .08);transition:.3s}.challenge-stat:hover{transform:translateY(-5px)}.challenge-stat h3{font-size:34px;color:#2563eb;margin-bottom:10px}.challenge-stat p{margin:0;color:#555}.challenge-section-title{text-align:center;margin-bottom:30px}.challenge-section-title h2{font-size:34px;margin-bottom:10px;color:#0f172a}.challenge-section-title p{color:#666}.challenge-card{background:#fff;border-radius:24px;padding:25px;box-shadow:0 12px 30px rgb(0 0 0 / .08);transition:.3s;position:relative;overflow:hidden}.challenge-card:hover{transform:translateY(-8px)}.challenge-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:5px;background:linear-gradient(90deg,#2563eb,#06b6d4)}.challenge-top{display:flex;justify-content:space-between;margin-bottom:15px}.challenge-category{background:#dbeafe;color:#1d4ed8;padding:6px 12px;border-radius:50px;font-size:12px;font-weight:600}.challenge-status{background:#ecfccb;color:#3f6212;padding:6px 12px;border-radius:50px;font-size:12px;font-weight:600}.challenge-card h3{margin-bottom:15px;color:#0f172a;font-size:22px}.challenge-card p{color:#555;line-height:1.7}.challenge-info{display:flex;justify-content:space-between;margin-top:15px;margin-bottom:15px;font-weight:600;color:#2563eb}.challenge-requirement{background:#f8fafc;padding:15px;border-radius:12px;margin-top:15px}.challenge-card button{width:100%;margin-top:18px;padding:14px;border:none;border-radius:12px;background:linear-gradient(135deg,#2563eb,#06b6d4);color:#fff;font-weight:700;cursor:not-allowed;opacity:.95}.challenge-notice{margin-top:40px;background:#fff8e1;border-left:6px solid #f59e0b;padding:25px;border-radius:18px}.challenge-notice h3{margin-bottom:12px;color:#92400e}.challenge-notice p{color:#6b4f1d;line-height:1.8}@media(max-width:768px){.aictaw-challenge{padding:15px}.challenge-hero{padding:25px}.challenge-hero h1{font-size:30px}.challenge-info{flex-direction:column;gap:8px}.challenge-meta{flex-direction:column}}