@import url("https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&family=DM+Sans:wght@300;400;500;600&display=swap");:root{--bg-deep:#0a0f0f;--bg-main:#0f1818;--bg-card:rgba(20,35,35,.85);--bg-card-hover:rgba(30,50,50,.9);--bg-elevated:rgba(35,55,55,.95);--gold-start:#c9a962;--gold-mid:#e8d5a3;--gold-end:#b8956a;--gold-glow:rgba(201,169,98,.4);--teal:#3d8b8b;--teal-light:#5ab0b0;--teal-glow:rgba(90,176,176,.3);--text-bright:#f4f8f8;--text-main:#d0dede;--text-soft:#9eb5b5;--text-muted:#6a8585;--border-glass:hsla(0,0%,100%,.08);--border-glow:rgba(201,169,98,.3);--shadow-soft:0 8px 32px rgba(0,0,0,.4);--shadow-glow:0 0 40px rgba(201,169,98,.15);--sidebar-width:220px;--radius:16px;--radius-lg:24px}*{margin:0;padding:0;box-sizing:border-box}body,html{overscroll-behavior:none;overflow-x:hidden;scroll-behavior:smooth}body{font-family:DM Sans,-apple-system,sans-serif;background:var(--bg-deep);background-image:radial-gradient(ellipse 80% 50% at 50% 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var(--teal-glow)}.answer-letter{font-family:Playfair Display,Georgia,serif;font-size:1.1rem;font-weight:600;background:linear-gradient(135deg,var(--gold-start),var(--gold-mid));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;width:24px}.answer-row .form-input{flex:1 1}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted);font-size:15px}.loading{display:flex;align-items:center;justify-content:center;padding:60px;color:var(--text-soft);font-size:15px}.loading:before{content:"";width:24px;height:24px;border:2px solid var(--border-glass);border-top-color:var(--gold-start);border-radius:50%;margin-right:12px;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.difficulty-dot{display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:8px;flex-shrink:0}.difficulty-dot.difficulty-easy{background:#4ade80;box-shadow:0 0 6px rgba(74,222,128,.5)}.difficulty-dot.difficulty-medium{background:#fbbf24;box-shadow:0 0 6px rgba(251,191,36,.5)}.difficulty-dot.difficulty-hard{background:#f87171;box-shadow:0 0 6px hsla(0,91%,71%,.5)}.mobile-nav{display:none;position:fixed;bottom:16px;left:50%;transform:translateX(-50%);z-index:100;padding-bottom:env(safe-area-inset-bottom)}.mobile-nav-pill{display:flex;background:rgba(25,32,28,.9);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-glass);border-radius:100px;padding:3px;gap:2px;box-shadow:0 4px 20px rgba(0,0,0,.5)}.mobile-nav-tab{text-align:center;padding:8px 24px;color:var(--text-muted);text-decoration:none;font-size:12px;font-weight:500;border-radius:100px;transition:all .3s ease;white-space:nowrap}.mobile-nav-tab.active{color:var(--bg-dark);background:linear-gradient(135deg,var(--gold-light),var(--gold-mid));box-shadow:0 2px 8px rgba(201,169,98,.3)}@media (max-width:1024px){body,html{scroll-behavior:auto!important}.main,.questions-list{overflow-anchor:none}.sidebar{width:80px}.logo-text,.sidebar-footer span{display:none}.logo{padding:24px 16px}.logo,.nav-item{justify-content:center}.nav-item{padding:14px;font-size:0}.nav-item:after{font-size:18px}.main{margin-left:80px;padding:24px}.stats-grid{grid-template-columns:repeat(3,1fr);gap:14px}}@media (max-width:768px){body,html{scroll-behavior:auto!important}.sidebar{display:none}.mobile-nav{display:block}.main{margin-left:0;padding:20px 20px 80px}.main,.questions-list{overflow-anchor:none}.section-header{flex-direction:column;align-items:stretch;gap:16px}.section-header h1{font-size:1.5rem;text-align:center}.header-actions{justify-content:center}.form-row{grid-template-columns:1fr}.filters-bar{flex-direction:column}.filter-input,.filter-select{width:100%;min-width:auto}.stats-grid{grid-template-columns:1fr;gap:12px}.stat-card{padding:20px;flex-direction:row;justify-content:space-between;align-items:center;text-align:left}.stat-value{font-size:2rem;order:2}.stat-label{order:1;font-size:13px;letter-spacing:1px}.question-card{padding:18px}.question-meta{gap:8px}.question-meta span{padding:4px 10px;font-size:11px}.modal-backdrop{padding:0;align-items:stretch;overflow-y:auto}.modal-container{max-height:none;height:100vh;margin:0;border-radius:0;display:flex;flex-direction:column}.modal-body{padding:20px;flex:1 1;overflow-y:scroll;-webkit-overflow-scrolling:touch;min-height:0}.modal-header{padding:16px 20px;position:-webkit-sticky;position:sticky;top:0;z-index:10;flex-shrink:0;box-shadow:0 2px 10px rgba(0,0,0,.3)}.modal-body,.modal-footer,.modal-header{background:var(--bg-main)}.modal-footer{padding:16px 20px calc(16px + env(safe-area-inset-bottom));flex-shrink:0;border-top:1px solid var(--border-glass)}.topics-grid{grid-template-columns:1fr 1fr;gap:10px}.topic-card{padding:14px}.topic-name{font-size:12px}.topic-count{font-size:1.2rem}.pagination{gap:12px;margin-bottom:70px}.pagination-btn{padding:6px 12px;font-size:12px}.pagination-info{font-size:11px}.card-header{padding:18px 20px}.card-body{padding:20px}.answer-row{flex-wrap:wrap}.answer-row .form-input{width:100%;margin-top:8px}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-soft)}::selection{background:var(--gold-glow);color:var(--text-bright)}a{text-decoration:none;color:inherit}