:root{--accent-green:#10b981;--accent-green-dark:#059669;--accent-green-light:rgba(16,185,129,0.08);--text-primary:#0a0a0a;--text-secondary:#666666;--bg-primary:#fafafa;--bg-secondary:#ffffff;--bg-subtle:rgba(0,0,0,0.05);--bg-hero:linear-gradient(135deg,#f8fafc,#f1f5f9);--bg-cta:linear-gradient(135deg,#ecfdf5,#d1fae5);--border-color:#e5e5e5;--border-cta:#a7f3d0;--shadow-card:0 1px 3px rgba(0,0,0,0.06);--shadow-card-hover:0 8px 24px rgba(0,0,0,0.08);--shadow-sticky:0 -4px 20px rgba(0,0,0,0.1);--radius-sm:6px;--radius-md:10px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:20px;--radius-pill:100px;--transition-fast:0.15s ease;--transition-base:0.2s ease;--transition-slow:0.3s ease;--color-correct:#10b981;--color-correct-bg:rgba(16,185,129,0.1);--color-correct-border:#dcfce7;--color-incorrect:#ef4444;--color-incorrect-bg:rgba(239,68,68,0.1);--color-selected-bg:rgba(16,185,129,0.05);--explanation-bg:#f0fdf4;--explanation-border:#dcfce7;--explanation-title:#15803d;--header-height:72px;--header-height-mobile:60px;--header-bg:rgba(255,255,255,0.8);--header-bg-scrolled:rgba(255,255,255,0.95);--header-border-scrolled:#E7EBF0;--accent-blue:#3b82f6;--accent-yellow:#fbbf24;--gradient-hero:linear-gradient(180deg,#ffffff,#f0f9ff 50%,#ffffff);--gradient-green-blue:linear-gradient(135deg,#10b981,#3b82f6);--gradient-cta:linear-gradient(135deg,#10b981,#059669);--bg-gray:#f9fafb;--text-tertiary:#9ca3af;--text-link:#0066cc}.prose-content{color:var(--text-primary);line-height:1.85;font-size:17px}.prose-content h2{font-size:24px;font-weight:700;margin-top:40px;margin-bottom:16px}.prose-content h3{font-size:20px;font-weight:600;margin-top:24px;margin-bottom:12px}.prose-content p{margin-bottom:16px}.prose-content ol,.prose-content ul{margin-bottom:16px;padding-left:24px}.prose-content li{margin-bottom:8px}.prose-content strong{font-weight:600}.prose-content code{background:#f3f4f6;padding:2px 6px;border-radius:4px;font-size:14px}.prose-content table{width:100%;border-collapse:collapse;margin-bottom:24px}.prose-content td,.prose-content th{padding:12px;text-align:left;border-bottom:1px solid var(--border-color)}.prose-content th{font-weight:600;background:#f9fafb}.prose-content blockquote{border-left:4px solid var(--accent-green);padding-left:16px;margin:16px 0;font-style:italic;color:var(--text-secondary)}*{box-sizing:border-box}body,html{overflow-x:hidden;width:100%;max-width:100vw;position:relative}body{color:var(--text-primary);background:var(--bg-primary);font-family:Arial,Helvetica,sans-serif;margin:0;padding:0}html{scroll-behavior:smooth}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#aaa}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.header_header__ZYf69{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--header-bg);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid transparent;transition:all .3s cubic-bezier(.4,0,.2,1)}.header_header__ZYf69[data-scrolled=true]{background:var(--header-bg-scrolled);border-bottom-color:var(--header-border-scrolled);box-shadow:0 4px 24px -1px rgba(11,18,33,.08)}.header_headerContainer__GcVez{max-width:1200px;margin:0 auto;padding:0 24px;height:var(--header-height);display:flex;align-items:center;justify-content:space-between}.header_logoLink__3vH4K{display:flex;align-items:center;text-decoration:none}.header_desktopNav__8UkPq{display:flex;gap:.5rem;align-items:center}.header_navLink__e80Ce{color:#1C2333;text-decoration:none;font-size:15px;font-weight:500;padding:.625rem 1rem;border-radius:var(--radius-md);transition:all var(--transition-base)}.header_navLink__e80Ce:hover{color:#0B1221;background:#F7F9FB}.header_separator__mrK3p{width:1px;height:24px;background:#E7EBF0;margin:0 .5rem}.header_authShimmer__F2uNG{width:90px;height:40px;background:rgba(0,0,0,.04);border-radius:var(--radius-md);animation:header_shimmer__QZgz9 2s infinite}.header_loginBtn__ZxTMv{background:#2E7BFF;border:none;color:white;font-weight:600;font-size:15px;padding:.625rem 1.25rem;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);box-shadow:0 4px 14px rgba(46,123,255,.25);display:flex;align-items:center;gap:.5rem}.header_loginBtn__ZxTMv:hover{transform:translateY(-2px);background:#1A4EB0;box-shadow:0 6px 20px rgba(46,123,255,.35)}.header_adminBadge__e6BBb{background:linear-gradient(135deg,rgba(251,191,36,.12),rgba(251,191,36,.08));color:#fbbf24;text-decoration:none;font-size:15px;font-weight:600;padding:.625rem 1rem;border-radius:var(--radius-md);border:1px solid rgba(251,191,36,.2);transition:all var(--transition-base)}.header_adminBadge__e6BBb:hover{background:linear-gradient(135deg,rgba(251,191,36,.2),rgba(251,191,36,.15));border-color:rgba(251,191,36,.3);transform:translateY(-1px)}.header_profileBtn__OX_u4{display:flex;align-items:center;gap:.625rem;text-decoration:none;padding:.5rem .875rem;border-radius:var(--radius-md);background:#F7F9FB;border:1px solid #e7ebf0;transition:all var(--transition-base)}.header_profileBtn__OX_u4:hover{background:#E7EBF0;border-color:#8992A3;transform:translateY(-1px)}.header_profileAvatar__cTJ0H{width:32px;height:32px;background:linear-gradient(135deg,#00C18A,#2E7BFF);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:white;box-shadow:0 2px 8px rgba(0,193,138,.3)}.header_profileName__0jvRQ{color:#0B1221;font-size:15px;font-weight:600}.header_logoutBtn__aBiRj{background:transparent;border:1px solid #e7ebf0;color:#8992A3;font-weight:500;font-size:15px;padding:.625rem 1rem;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);margin-left:.25rem}.header_logoutBtn__aBiRj:hover{background:#F7F9FB;border-color:#8992A3;color:#0B1221}.header_mobileAvatar__yi4Li{display:none;width:28px;height:28px;background:linear-gradient(135deg,#00C18A,#2E7BFF);border-radius:50%;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:white;flex-shrink:0}.header_mobileMenuBtn__HqiAo{display:none;background:#F7F9FB;border:none;border-radius:var(--radius-md);padding:.625rem;cursor:pointer;transition:all var(--transition-base);width:40px;height:40px;align-items:center;justify-content:center;color:var(--text-primary)}.header_mobileMenuBtn__HqiAo:hover{background:rgba(0,0,0,.1)}.header_backdrop__pbVa_{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:999;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.header_sidebar__vhNpX{position:fixed;top:0;right:0;bottom:0;width:280px;max-width:80vw;background:rgba(255,255,255,.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);z-index:1001;box-shadow:-4px 0 24px rgba(0,0,0,.15);display:flex;flex-direction:column;animation:header_slideIn__RINS3 .3s ease;border-left:1px solid rgba(0,0,0,.1)}.header_sidebarHeader__CCj_W{padding:1.25rem 1.5rem;border-bottom:1px solid rgba(0,0,0,.1);display:flex;align-items:center;justify-content:space-between}.header_sidebarTitle___WCFx{font-size:18px;font-weight:700;color:var(--text-primary)}.header_sidebarClose__OER8t{background:transparent;border:none;cursor:pointer;padding:.5rem;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--text-primary)}.header_sidebarUserInfo__HGFQk{padding:1rem 1.5rem;border-bottom:1px solid rgba(0,0,0,.1);display:flex;align-items:center;gap:.75rem}.header_sidebarAvatar__L5ZYE{width:36px;height:36px;background:linear-gradient(135deg,#00C18A,#2E7BFF);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:white;flex-shrink:0}.header_sidebarUserMeta__IcA74{min-width:0}.header_sidebarUserName__CfGDh{font-size:14px;font-weight:600;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header_sidebarUserEmail__UGFVi{font-size:12px;color:rgba(0,0,0,.45);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header_sidebarMenu__fS3x_{flex:1 1;overflow-y:auto;padding:1rem}.header_sidebarLink__WqQ2k{display:flex;align-items:center;gap:.75rem;padding:.875rem 1rem;border-radius:var(--radius-md);text-decoration:none;color:rgba(10,10,10,.9);font-size:15px;font-weight:500;margin-bottom:.5rem;background:rgba(0,0,0,.04);border-left:3px solid transparent;transition:all var(--transition-base)}.header_sidebarLink__WqQ2k[data-active=true]{color:var(--accent-green);font-weight:600;background:rgba(16,185,129,.1);border-left-color:var(--accent-green)}.header_sidebarAdminLink__iqHeS{display:flex;align-items:center;gap:.75rem;padding:.875rem 1rem;border-radius:var(--radius-md);text-decoration:none;color:#fbbf24;font-size:15px;font-weight:600;margin-bottom:.5rem;background:linear-gradient(135deg,rgba(251,191,36,.12),rgba(251,191,36,.08));border:1px solid rgba(251,191,36,.2);border-left:3px solid transparent}.header_sidebarAdminLink__iqHeS[data-active=true]{border-left-color:#fbbf24}.header_sidebarDivider__sjqsd{height:1px;background:rgba(0,0,0,.1);margin:1rem 0}.header_sidebarLogout__iad13{display:flex;align-items:center;gap:.75rem;padding:.875rem 1rem;border-radius:var(--radius-md);color:#ef4444;font-size:15px;font-weight:500;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);cursor:pointer;width:100%;text-align:left}.header_footer__Dz8jm{background:#F7F9FB;color:#0B1221;padding:3rem 0 2rem;border-top:1px solid #e7ebf0}.header_footerInner__gm5OR{max-width:1200px;margin:0 auto;padding:0 24px}.header_footerLinks__qTAxy{display:flex;justify-content:center;flex-wrap:wrap;gap:1.5rem;margin-bottom:1.5rem}.header_footerLink__Un8mg{color:#8992A3;text-decoration:none;font-size:14px;font-weight:500;transition:color var(--transition-base)}.header_footerLink__Un8mg:hover{color:#0B1221}.header_footerDot__UxIDD{color:#E7EBF0}.header_footerDisclaimer__SaKeQ{text-align:center;margin-bottom:1rem;padding:0 2rem}.header_footerDisclaimerText__QphNw{color:#8992A3;font-size:12px;line-height:1.6}.header_footerCopyright__A1sZD{text-align:center;color:#8992A3;font-size:14px}@keyframes header_shimmer__QZgz9{0%{opacity:1}50%{opacity:.4}to{opacity:1}}@keyframes header_slideIn__RINS3{0%{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}@media (max-width:768px){.header_headerContainer__GcVez{padding:0 1rem;height:64px}.header_desktopNav__8UkPq{gap:.25rem}.header_desktopNav__8UkPq>a,.header_desktopNav__8UkPq>button{padding:.5rem .625rem;font-size:13px}.header_mobileAvatar__yi4Li,.header_mobileMenuBtn__HqiAo{display:flex}.header_adminBadge__e6BBb,.header_logoutBtn__aBiRj,.header_navLink__e80Ce[href="/admin"],.header_navLink__e80Ce[href="/dashboard"],.header_profileBtn__OX_u4,.header_separator__mrK3p{display:none}}@media (max-width:640px){.header_headerContainer__GcVez{padding:0 .75rem;height:var(--header-height-mobile)}.header_navLink__e80Ce[href="/certifications"]{display:none}.header_desktopNav__8UkPq{gap:.5rem}.header_footerLinks__qTAxy{gap:1rem;font-size:13px}.header_footerDot__UxIDD{display:none}.header_footerLink__Un8mg{font-size:13px}}