body{background:#f6f8fb;font-family:Tahoma,Arial,sans-serif}.hero{background:linear-gradient(135deg,#0d6efd,#6f42c1);color:#fff;border-radius:24px;padding:48px 28px}.card{border:0;border-radius:18px;box-shadow:0 8px 30px rgba(0,0,0,.06)}.quiz-option{display:block;border:1px solid #dee2e6;border-radius:12px;padding:12px;margin:8px 0;cursor:pointer}.quiz-option:hover{background:#eef5ff}.ad-slot{text-align:center;overflow:hidden}.stat{font-size:1.8rem;font-weight:700}.admin-sidebar{min-height:100vh;background:#172033;color:#fff}.admin-sidebar a{color:#dce5f5;text-decoration:none;display:block;padding:10px 14px;border-radius:9px}.admin-sidebar a:hover{background:#26334d}