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#7c6ef099}.modal{z-index:300;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal.hidden{display:none}.modal-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000000b3;position:absolute;inset:0}.modal-box{border-radius:var(--radius-xl);width:100%;max-width:380px;padding:28px;position:relative}.modal-title{margin-bottom:8px;font-size:1.1rem;font-weight:700}.modal-desc{color:var(--text-2);margin-bottom:20px;font-size:.85rem}.modal-actions{justify-content:flex-end;gap:10px;display:flex}.topic-nav-footer{border-top:1px solid var(--glass-border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:32px;padding-top:20px;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:.3s forwards fadeIn}.hidden{display:none!important}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:99px}::-webkit-scrollbar-thumb:hover{background:#ffffff2e}@media (max-width:768px){#app-sidebar.sidebar{width:min(var(--sidebar-width), 85vw)}#app-sidebar.sidebar.open{z-index:250;box-shadow:4px 0 40px #00000080}.sidebar-overlay.active{z-index:240;display:block}.topbar{gap:8px;padding:8px 12px}.breadcrumb-part:not(:last-child),.breadcrumb-part:last-child .breadcrumb-sep{display:none}.main-content{padding:16px 16px 60px}.categories-grid{grid-template-columns:1fr}.home-title{font-size:1.6rem}.section-card,.interview-card{padding:16px}.topic-header-main{flex-direction:column;gap:8px}.section-content table{font-size:.75rem}.section-content th,.section-content td{padding:6px 8px}.quiz-option{padding:9px 12px}code.block-code{font-size:.76rem}}@media (max-width:480px){.home-hero{padding:20px 0 28px}.topic-title{font-size:1.2rem}.topic-nav-footer{flex-direction:column}.topbar-reset-label{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.topbar-reset-btn{position:relative}}.search-highlight{color:var(--warning);background:#f59e0b40;border-radius:2px}.empty-state{text-align:center;color:var(--text-3);padding:48px 20px}.empty-state-icon{margin-bottom:12px;font-size:3rem}.empty-state-text{font-size:.9rem}.stats-bar{flex-wrap:wrap;gap:12px;margin-bottom:28px;display:flex}.stat-chip{background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-2);border-radius:99px;align-items:center;gap:6px;padding:6px 12px;font-size:.78rem;display:flex}.stat-chip strong{color:var(--text-1)}