:root{--brand-primary:#213d5e;--brand-primary-light:#213d5e;--brand-primary-dark:#213d5e;--brand-sec1:#c6c6c6;--brand-sec1-light:#f9f9f9;--brand-sec1-dark:#959595;--brand-sec2:#fff200;--brand-sec2-light:#ffff57;--brand-sec2-dark:#c7c000;--brand-sec3:#00a7e0;--brand-sec3-light:#62d8ff;--brand-sec3-dark:#0078ae;--font-sans:Arial, Helvetica, sans-serif;--font-heading:Arial, Helvetica, sans-serif;--sidebar-width:260px;--header-height:70px;--mobile-header-height:58px;--bottom-nav-height:64px;--course-player-sidebar-width:320px;--radius-lg:16px;--radius-md:10px;--radius-sm:6px;--transition-fast:.15s ease;--transition-normal:.25s ease;--transition-slow:.4s cubic-bezier(.16, 1, .3, 1)}:root[data-theme=light],[data-theme=light]{--bg-primary:var(--brand-sec1-light);--bg-secondary:#fff;--bg-tertiary:var(--brand-sec1);--card-bg:#fff;--card-border:var(--brand-sec1);--card-hover-border:var(--brand-primary-light);--text-primary:var(--brand-primary-dark);--text-secondary:#334155;--text-muted:var(--brand-sec1-dark);--primary:var(--brand-primary-light);--primary-hover:var(--brand-sec3);--primary-glow:#4671af33;--secondary:var(--brand-sec3);--secondary-hover:var(--brand-sec3-dark);--success:#10b981;--success-bg:#10b98126;--success-border:#10b9814d;--warning:var(--brand-sec2-dark);--warning-bg:#c7c00026;--warning-border:#c7c0004d;--danger:#ef4444;--danger-bg:#ef444426;--danger-border:#ef44444d;--badge-success-text:#065f46;--badge-success-bg:#d1fae5;--badge-warning-text:#92400e;--badge-warning-bg:#fef3c7;--badge-danger-text:#991b1b;--badge-danger-bg:#fee2e2;--badge-info-text:#1e40af;--badge-info-bg:#dbeafe;--badge-neutral-text:#374151;--badge-neutral-bg:#f3f4f6}:root,:root[data-theme=dark],[data-theme=dark]{--bg-primary:#000c1e;--bg-secondary:var(--brand-primary-dark);--bg-tertiary:var(--brand-primary);--card-bg:#00467f40;--card-border:#4671af33;--card-hover-border:var(--brand-primary-light);--text-primary:var(--brand-sec1-light);--text-secondary:var(--brand-sec1);--text-muted:var(--brand-sec1-dark);--primary:var(--brand-primary-light);--primary-hover:var(--brand-sec3-light);--primary-glow:#4671af4d;--secondary:var(--brand-sec3);--secondary-hover:var(--brand-sec3-light);--success:#10b981;--success-bg:#10b98126;--success-border:#10b9814d;--warning:var(--brand-sec2);--warning-bg:#fff20026;--warning-border:#fff2004d;--danger:#ef4444;--danger-bg:#ef444426;--danger-border:#ef44444d;--badge-success-text:#a7f3d0;--badge-success-bg:#10b98126;--badge-warning-text:#fde68a;--badge-warning-bg:#f59e0b26;--badge-danger-text:#fca5a5;--badge-danger-bg:#ef444426;--badge-info-text:#93c5fd;--badge-info-bg:#3b82f626;--badge-neutral-text:#d1d5db;--badge-neutral-bg:#9ca3af26}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;overflow-x:hidden}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#00000026;border-radius:999px}::-webkit-scrollbar-thumb{background:var(--text-muted);background-clip:padding-box;border:2px 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0;font-size:.68rem;font-weight:500;text-decoration:none;display:flex;position:relative}.mobile-bottom-nav-item:active{transform:scale(.95)}.mobile-bottom-nav-item.active{color:var(--primary);font-weight:700}.mobile-bottom-nav-item.active:after{content:"";background:var(--primary);border-radius:0 0 4px 4px;width:24px;height:3px;position:absolute;top:0;left:50%;transform:translate(-50%)}.course-player-shell{z-index:2000;background:var(--bg-primary);width:100vw;height:100dvh;display:flex;position:fixed;top:0;left:0;overflow:hidden}.course-player-sidebar{width:var(--course-player-sidebar-width);flex:0 0 var(--course-player-sidebar-width);background:var(--brand-primary-dark);border-right:1px solid var(--card-border);height:100%;transition:transform var(--transition-normal);flex-direction:column;padding:1.25rem 1rem;display:flex;position:relative;overflow-y:auto}.course-player-main{background:var(--bg-primary);min-width:0;height:100%;transition:margin-left var(--transition-normal);flex-direction:column;flex:1;display:flex;overflow-y:hidden}@media (width<=768px){.course-player-sidebar{z-index:2100;width:300px;max-width:85vw;box-shadow:none;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%)}.course-player-sidebar.mobile-open{transform:translate(0);box-shadow:10px 0 40px #000000b3}.course-player-main{margin-left:0!important;padding:0!important}}.course-player-mobile-bar{background:var(--bg-secondary);border-bottom:1px solid var(--card-border);z-index:100;flex-shrink:0;justify-content:space-between;align-items:center;gap:.5rem;min-height:48px;padding:.5rem .75rem;display:none}@media (width<=768px){.course-player-mobile-bar{display:flex}}.course-player-mobile-footer{background:var(--bg-secondary);border-top:1px solid var(--card-border);min-height:52px;padding:.5rem .75rem;padding-bottom:env(safe-area-inset-bottom,.5rem);flex-shrink:0;justify-content:space-between;align-items:center;gap:.5rem;display:none}@media (width<=768px){.course-player-mobile-footer{display:flex}}.responsive-iframe-wrapper{-webkit-overflow-scrolling:touch;background:#fff;flex:1;width:100%;height:100%;min-height:0;position:relative}.responsive-iframe-wrapper iframe{border:none;width:100%;height:100%;display:block}.question-pills-strip{scrollbar-width:none;-ms-overflow-style:none;-webkit-overflow-scrolling:touch;gap:.4rem;padding:.5rem .25rem;display:flex;overflow-x:auto}.question-pills-strip::-webkit-scrollbar{display:none}.question-pill-btn{border-radius:var(--radius-sm);border:1px solid var(--card-border);background:var(--bg-secondary);min-width:32px;height:32px;color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0;justify-content:center;align-items:center;padding:0 .35rem;font-size:.75rem;font-weight:600;display:inline-flex}.question-pill-btn:active{transform:scale(.92)}.question-pill-btn.current{font-weight:700;border:2px solid var(--primary)!important;background:var(--primary-glow)!important;color:var(--primary)!important}.question-pill-btn.answered{color:var(--success);background:#10b9811f;border-color:#10b98166}.question-pill-btn.unanswered-required{border-color:#ef444466}@media (width<=640px){.modal-overlay{padding:.5rem}.modal-content{max-height:calc(100dvh - 1rem);padding:1.25rem;width:100%!important;max-width:100%!important}.login-card{padding:1.5rem 1.25rem!important}}.login-split-container{background:var(--bg-primary);width:100vw;min-height:100dvh;color:var(--text-primary);display:flex;overflow:hidden auto}.login-form-side{box-sizing:border-box;z-index:10;flex-direction:column;flex:0 0 400px;justify-content:space-between;width:100%;max-width:480px;padding:2.5rem 2rem;display:flex;overflow-y:auto}.login-billboard-side{background-position:50%;background-size:cover;flex:1;justify-content:center;align-items:center;display:flex;position:relative}@media (width<=768px){.login-split-container{flex-direction:column}.login-form-side{flex:auto;width:100%;min-width:0;max-width:100%;padding:1.75rem 1.25rem}.login-billboard-side{display:none}}.test-interface-container{gap:2rem;width:100%;height:100%;min-height:0;display:flex}.test-interface-left{border-right:1px solid var(--card-border);flex-direction:column;flex:1;justify-content:space-between;min-width:0;height:100%;padding-right:2rem;display:flex;overflow-y:auto}.test-interface-right{flex-direction:column;flex:0 0 250px;align-items:center;height:100%;display:flex;overflow-y:auto}.mobile-only-test-submit,.mobile-close-drawer-btn,.mobile-brand-title{display:none}@media (width<=1024px){.mobile-close-drawer-btn,.mobile-brand-title{display:flex!important}}@media (width<=768px){.test-interface-container{flex-direction:column;gap:1rem;height:auto;min-height:100%;overflow-y:auto}.test-interface-left{border-right:none;height:auto;padding-right:0;overflow-y:visible}.test-interface-right{display:none!important}.mobile-only-test-submit{display:block!important}.courses-grid{grid-template-columns:1fr;gap:1rem}}.mobile-only-warning-banner{display:none}@media (width<=768px){.mobile-only-warning-banner{display:flex!important}}.responsive-pagination-wrapper{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;width:100%;margin-top:1.5rem;padding:.5rem 0;display:flex}.pagination-info{color:var(--text-secondary);font-size:.85rem}.pagination-controls{flex-wrap:wrap;align-items:center;gap:.35rem;display:flex}.pagination-numbers-strip{align-items:center;gap:.25rem;display:flex}.pagination-nav-btn{font-weight:600;padding:.3rem .65rem!important;font-size:.8rem!important}.pagination-page-btn{justify-content:center;align-items:center;min-width:32px;height:32px;font-weight:600;display:inline-flex;border-radius:var(--radius-md)!important;padding:.3rem .55rem!important;font-size:.8rem!important}.pagination-ellipsis{color:var(--text-muted);-webkit-user-select:none;user-select:none;padding:0 .3rem;font-size:.85rem;font-weight:700}@media (width<=640px){.responsive-pagination-wrapper{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:.75rem}.pagination-controls{justify-content:center;width:100%}.pagination-page-btn{min-width:28px;height:28px;padding:.2rem .4rem!important;font-size:.75rem!important}.pagination-nav-btn{padding:.25rem .5rem!important;font-size:.75rem!important}}