@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";
html.lenis,html.lenis body{height:auto}.lenis.lenis-smooth{scroll-behavior:auto!important}.lenis.lenis-smooth [data-lenis-prevent]{overscroll-behavior:contain}.lenis.lenis-stopped{overflow:hidden}.lenis.lenis-smooth iframe{pointer-events:none}:root{--brand-blue:#305cde;--brand-navy:#0a1945;--brand-white:#fff;--brand-black:#000;--bg-main:#030712;--bg-gradient:radial-gradient(circle at 15% 15%, #305cde40 0%, transparent 45%), radial-gradient(circle at 85% 85%, #0a1945e6 0%, transparent 55%), linear-gradient(180deg, #000 0%, #030712 100%);--glass-bg:#0a1945a6;--glass-bg-hover:#305cde29;--glass-bg-active:#305cde59;--glass-border:#ffffff1f;--glass-border-glow:#305cde80;--glass-blur:blur(28px) saturate(190%);--glass-shadow:0 16px 40px 0 #0009, inset 0 1px 0 0 #ffffff2e;--text-primary:#fff;--text-secondary:#94a3b8;--text-tertiary:#64748b;--text-accent:#60a5fa;--text-on-accent:#fff;--accent-primary:#305cde;--accent-hover:#4c77f2;--accent-glow:#305cde66;--code-bg:#020617e6;--code-border:#305cde4d;--code-text:#e2e8f0;--sidebar-width:320px;--header-height:74px;--radius-sm:10px;--radius-md:16px;--radius-lg:24px;--radius-full:9999px;--transition-smooth:all .3s cubic-bezier(.16, 1, .3, 1);--transition-spring:all .4s cubic-bezier(.34, 1.56, .64, 1)}[data-theme=light]{--bg-main:#f4f7ff;--bg-gradient:radial-gradient(circle at 10% 20%, #305cde1f 0%, transparent 40%), radial-gradient(circle at 90% 80%, #0a194514 0%, transparent 50%), linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);--glass-bg:#ffffffbf;--glass-bg-hover:#305cde14;--glass-bg-active:#305cde29;--glass-border:#305cde26;--glass-border-glow:#305cde80;--glass-blur:blur(20px) saturate(190%);--glass-shadow:0 16px 40px 0 #0a194512, inset 0 1px 0 0 #ffffffe6;--text-primary:#0a1945;--text-secondary:#475569;--text-tertiary:#64748b;--text-accent:#305cde;--text-on-accent:#fff;--accent-primary:#305cde;--accent-hover:#2144a8;--accent-glow:#305cde40;--code-bg:#0a1945f2;--code-border:#305cde4d;--code-text:#f8fafc}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{letter-spacing:-.01em;background:var(--bg-main);max-width:100vw;height:100%;color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-weight:400;overflow-x:hidden!important}body{background-image:var(--bg-gradient);background-attachment:fixed;position:relative}.liquid-bg-blob{filter:blur(90px);pointer-events:none;z-index:0;opacity:.4;border-radius:50%;animation:20s ease-in-out infinite alternate liquidFloat;position:fixed}.liquid-bg-blob-1{background:radial-gradient(circle, var(--brand-blue) 0%, #305cde00 70%);width:550px;height:550px;top:-120px;left:-120px}.liquid-bg-blob-2{background:radial-gradient(circle, var(--brand-navy) 0%, #0a194500 70%);width:650px;height:650px;animation-delay:-10s;bottom:-180px;right:-180px}@keyframes liquidFloat{0%{transform:translate(0)scale(1)}50%{transform:translate(60px,40px)scale(1.1)}to{transform:translate(-40px,80px)scale(.95)}}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);border-radius:var(--radius-lg);transition:var(--transition-smooth)}.glass-panel-sm{-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:var(--radius-md);background:#0a194573}[data-theme=light] .glass-panel-sm{background:#ffffff8c}.flex-center-gap{align-items:center;gap:6px;display:inline-flex}.app-layout{z-index:1;width:100%;max-width:100vw;min-height:100vh;display:flex;position:relative;overflow-x:hidden}.sidebar-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:90;opacity:0;pointer-events:none;transition:var(--transition-smooth);background:#000000a6;position:fixed;inset:0}.sidebar-overlay.visible{opacity:1;pointer-events:auto}.sidebar{width:var(--sidebar-width);z-index:100;background:var(--glass-bg);height:100vh;-webkit-backdrop-filter:var(--glass-blur);border-right:1px solid var(--glass-border);box-shadow:var(--glass-shadow);-webkit-overflow-scrolling:touch;overscroll-behavior:contain;transition:var(--transition-smooth);flex-direction:column;display:flex;position:fixed;top:0;bottom:0;left:0;overflow-x:hidden;overflow-y:auto!important}.sidebar::-webkit-scrollbar{width:6px;display:block}.sidebar::-webkit-scrollbar-track{background:0 0}.sidebar::-webkit-scrollbar-thumb{background:#ffffff40;border-radius:9999px}.sidebar::-webkit-scrollbar-thumb:hover{background:var(--brand-blue)}.sidebar-header{z-index:20;background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--glass-border);flex-direction:column;flex:none;gap:16px;padding:22px 22px 18px;display:flex;position:sticky;top:0}.brand-logo-wrapper{text-decoration:none;transition:transform .3s cubic-bezier(.34,1.56,.64,1);display:inline-block}.brand-logo-wrapper:hover{transform:translateY(-1px)scale(1.02)}.brand-logo-img{object-fit:contain;filter:drop-shadow(0 4px 18px #305cde66);width:auto;max-width:100%;height:48px;transition:filter .3s}.sidebar-search{align-items:center;display:flex;position:relative}.sidebar-search-icon{color:var(--text-tertiary);pointer-events:none;position:absolute;left:14px}.sidebar-search input{border-radius:var(--radius-full);border:1px solid var(--glass-border);width:100%;color:var(--text-primary);transition:var(--transition-smooth);background:#ffffff0d;outline:none;padding:9px 14px 9px 38px;font-size:.84rem;font-weight:300}[data-theme=light] .sidebar-search input{background:#0a19450a}.sidebar-search input:focus{border-color:var(--brand-blue);background:#ffffff14;box-shadow:0 0 15px #305cde4d}.sidebar-nav{flex-direction:column;gap:6px;padding:16px 14px 120px;display:flex}.sidebar-topic{border-radius:var(--radius-md);transition:var(--transition-smooth);overflow:hidden}.sidebar-topic-header{border-radius:var(--radius-md);width:100%;color:var(--text-primary);cursor:pointer;text-align:left;transition:var(--transition-smooth);background:0 0;border:1px solid #0000;align-items:center;gap:12px;padding:10px 12px;display:flex}.sidebar-topic-header:hover{background:var(--glass-bg-hover);border-color:var(--glass-border)}.sidebar-topic-header.active{background:var(--glass-bg-active);border-color:var(--glass-border-glow)}.sidebar-topic-icon{border-radius:var(--radius-sm);width:32px;height:32px;color:var(--brand-blue);background:#305cde26;border:1px solid #305cde4d;justify-content:center;align-items:center;display:flex}.sidebar-topic-info{flex:1;overflow:hidden}.sidebar-topic-title{white-space:nowrap;text-overflow:ellipsis;font-size:.86rem;font-weight:500;overflow:hidden}.sidebar-topic-count{color:var(--text-secondary);font-size:.72rem;font-weight:300}.sidebar-topic-chevron{color:var(--text-tertiary);transition:transform .3s}.sidebar-topic-chevron.open{transform:rotate(90deg)}.sidebar-questions{flex-direction:column;gap:3px;max-height:0;padding-left:10px;transition:max-height .35s cubic-bezier(0,1,0,1);display:flex;overflow:hidden}.sidebar-questions.expanded{max-height:5000px;padding-top:6px;padding-bottom:6px;transition:max-height .5s ease-in-out}.sidebar-question-item{border-radius:var(--radius-sm);width:100%;color:var(--text-secondary);cursor:pointer;text-align:left;transition:var(--transition-smooth);background:0 0;border:none;align-items:center;gap:10px;padding:8px 12px;font-size:.8rem;font-weight:300;display:flex}.sidebar-question-item:hover{color:var(--text-primary);background:#ffffff0f}.sidebar-question-item.active{color:var(--brand-white);background:var(--brand-blue);font-weight:500;box-shadow:0 4px 14px #305cde73}.sidebar-question-num{background:#ffffff1f;border-radius:4px;padding:2px 6px;font-size:.7rem;font-weight:600}.main-content{margin-left:var(--sidebar-width);min-height:100vh;width:calc(100% - var(--sidebar-width));flex-direction:column;flex:1;max-width:100vw;display:flex;overflow-x:hidden}@media (max-width:900px){.main-content{width:100%;max-width:100vw;margin-left:0}.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}}.main-header{height:var(--header-height);z-index:80;background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--glass-border);box-shadow:var(--glass-shadow);box-sizing:border-box;grid-template-columns:auto 1fr auto;align-items:center;gap:24px;width:100%;max-width:100vw;padding:0 32px;display:grid;position:sticky;top:0}.header-left{align-items:center;gap:16px;display:flex}.menu-toggle{border:1px solid var(--glass-border);color:var(--text-primary);border-radius:var(--radius-sm);cursor:pointer;background:0 0;padding:8px;display:none}@media (max-width:900px){.menu-toggle{display:block}}.mode-switcher{border:1px solid var(--glass-border);border-radius:var(--radius-full);background:#0000004d;align-items:center;gap:4px;padding:4px;display:flex}[data-theme=light] .mode-switcher{background:#0a19450d}.mode-tab-btn{border-radius:var(--radius-full);color:var(--text-secondary);cursor:pointer;transition:var(--transition-smooth);background:0 0;border:none;align-items:center;gap:8px;padding:8px 18px;font-size:.83rem;font-weight:400;display:flex}.mode-tab-btn:hover{color:var(--text-primary)}.mode-tab-btn.active{background:var(--brand-blue);color:var(--brand-white);font-weight:500;box-shadow:0 4px 14px #305cde66}.header-center{justify-content:center;align-items:center;display:flex}.platform-hero-badge{border-radius:var(--radius-full);transition:var(--transition-smooth);background:linear-gradient(135deg,#305cde2e 0%,#0a194573 100%);border:1px solid #305cde61;align-items:center;gap:9px;padding:7px 20px;display:inline-flex;box-shadow:0 4px 20px #305cde33,inset 0 1px #ffffff40}.platform-hero-badge:hover{border-color:#305cdea6;box-shadow:0 6px 26px #305cde59,inset 0 1px #ffffff59}.badge-glow-dot{background:#60a5fa;border-radius:50%;width:7px;height:7px;animation:2s infinite pulseDot;box-shadow:0 0 10px #60a5fa}@keyframes pulseDot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.85)}}.badge-sparkle-icon{color:var(--brand-blue)}.badge-text{letter-spacing:-.01em;color:var(--text-primary);white-space:nowrap;margin:0;padding:0;font-size:.88rem;font-weight:600;line-height:1}.header-right{align-items:center;gap:20px;display:flex}.header-progress{color:var(--text-secondary);align-items:center;gap:10px;font-size:.8rem;font-weight:400;display:flex}.header-progress-bar{border-radius:var(--radius-full);background:#ffffff1a;width:100px;height:5px;overflow:hidden}[data-theme=light] .header-progress-bar{background:#0a19451a}.header-progress-fill{background:linear-gradient(90deg, var(--brand-blue), #60a5fa);border-radius:var(--radius-full);height:100%;transition:width .4s}.theme-toggle-btn{border-radius:var(--radius-full);border:1px solid var(--glass-border);width:38px;height:38px;color:var(--text-primary);cursor:pointer;transition:var(--transition-smooth);background:#ffffff0f;justify-content:center;align-items:center;display:flex}.theme-toggle-btn:hover{background:var(--glass-bg-hover);border-color:var(--brand-blue);transform:rotate(15deg)}.content-area{box-sizing:border-box;flex:1;width:100%;max-width:100vw;padding:40px 32px 110px;overflow-y:auto}.content-wrapper{box-sizing:border-box;width:100%;max-width:900px;margin:0 auto}.question-card{box-sizing:border-box;word-wrap:break-word;overflow-wrap:anywhere;word-break:break-word;width:100%;padding:36px;position:relative;overflow:hidden}.question-card:before{content:"";background:linear-gradient(90deg, var(--brand-blue), #60a5fa, var(--brand-navy));height:3px;position:absolute;top:0;left:0;right:0}.question-card-header{margin-bottom:28px}.question-meta{flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px;display:flex}.question-badge{border-radius:var(--radius-full);color:var(--text-accent);background:#305cde26;border:1px solid #305cde4d;align-items:center;gap:6px;padding:5px 14px;font-size:.78rem;font-weight:400;display:inline-flex}.question-number{color:var(--text-tertiary);margin-left:auto;font-size:.78rem;font-weight:300}.question-title{color:var(--text-primary);letter-spacing:-.02em;word-wrap:break-word;overflow-wrap:anywhere;font-size:1.55rem;font-weight:600;line-height:1.38}.question-card-body{box-sizing:border-box;flex-direction:column;gap:24px;width:100%;display:flex}.answer-section{border-radius:var(--radius-md);border:1px solid var(--glass-border);box-sizing:border-box;word-wrap:break-word;overflow-wrap:anywhere;background:#ffffff08;width:100%;padding:24px}[data-theme=light] .answer-section{background:#0a194505}.answer-label{text-transform:uppercase;letter-spacing:.06em;color:var(--brand-blue);align-items:center;gap:8px;margin-bottom:12px;font-size:.8rem;font-weight:600;display:flex}.answer-text{color:var(--text-primary);white-space:pre-line;word-wrap:break-word;overflow-wrap:anywhere;font-size:1.02rem;font-weight:300;line-height:1.68}.example-box{border-radius:var(--radius-md);color:var(--text-primary);box-sizing:border-box;word-wrap:break-word;overflow-wrap:anywhere;background:#f59e0b14;border:1px solid #f59e0b40;width:100%;padding:20px 24px}.example-label{color:#f59e0b;text-transform:uppercase;letter-spacing:.06em;align-items:center;gap:6px;margin-bottom:8px;font-size:.78rem;font-weight:600;display:flex}.example-text{color:var(--text-primary);word-wrap:break-word;overflow-wrap:anywhere;font-size:.95rem;font-weight:300;line-height:1.58}.code-block{border-radius:var(--radius-md);background:var(--code-bg);border:1px solid var(--code-border);box-sizing:border-box;width:100%;overflow:hidden;box-shadow:0 12px 30px #00000059}.code-header{border-bottom:1px solid var(--code-border);background:#0006;justify-content:space-between;align-items:center;padding:12px 18px;display:flex}.code-dots{gap:6px;display:flex}.code-dot{background:#fff3;border-radius:50%;width:10px;height:10px}.code-dot:first-child{background:#ef4444}.code-dot:nth-child(2){background:#f59e0b}.code-dot:nth-child(3){background:#10b981}.code-language{text-transform:uppercase;color:var(--brand-blue);letter-spacing:.08em;align-items:center;gap:6px;font-size:.72rem;font-weight:600;display:flex}.code-content{-webkit-overflow-scrolling:touch;padding:20px;overflow-x:auto}.code-content pre{color:var(--code-text);white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;font-family:JetBrains Mono,Fira Code,Consolas,monospace;font-size:.88rem;font-weight:400;line-height:1.6}.nav-bar{bottom:24px;left:calc(var(--sidebar-width) + (100% - var(--sidebar-width)) / 2);z-index:80;border-radius:var(--radius-full);background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);box-sizing:border-box;justify-content:center;align-items:center;gap:16px;width:auto;padding:10px 22px;display:inline-flex;position:fixed;transform:translate(-50%);box-shadow:0 20px 50px #00000080,inset 0 1px #fff3}@media (max-width:900px){.nav-bar{z-index:100;gap:14px;width:auto;max-width:fit-content;padding:8px 18px;bottom:16px;left:50%}}.nav-btn{border-radius:var(--radius-full);border:1px solid var(--glass-border);color:var(--text-primary);cursor:pointer;transition:var(--transition-smooth);background:#ffffff0f;align-items:center;gap:8px;padding:9px 20px;font-size:.85rem;font-weight:400;display:inline-flex}.nav-btn:hover:not(:disabled){background:var(--glass-bg-hover);border-color:var(--brand-blue);transform:translateY(-2px)}.nav-btn:disabled{opacity:.4;cursor:not-allowed}.nav-btn-primary{background:var(--brand-blue);color:var(--brand-white);border-color:var(--brand-blue);font-weight:500;box-shadow:0 4px 18px #305cde73}.nav-btn-primary:hover:not(:disabled){background:var(--accent-hover);box-shadow:0 6px 24px #305cde99}.nav-counter{color:var(--text-secondary);font-size:.82rem;font-weight:500}.quiz-container{box-sizing:border-box;width:100%;max-width:850px;margin:0 auto;padding:10px 0}.quiz-setup-card{box-sizing:border-box;flex-direction:column;gap:32px;width:100%;padding:38px;display:flex}.quiz-badge{border-radius:var(--radius-full);color:var(--brand-blue);background:#305cde26;border:1px solid #305cde4d;align-items:center;gap:8px;margin-bottom:12px;padding:5px 14px;font-size:.8rem;font-weight:500;display:inline-flex}.quiz-setup-title{letter-spacing:-.03em;color:var(--text-primary);margin-bottom:8px;font-size:1.85rem;font-weight:600}.quiz-setup-subtitle{color:var(--text-secondary);font-size:.95rem;font-weight:300;line-height:1.5}.quiz-setup-body{box-sizing:border-box;flex-direction:column;gap:36px;width:100%;display:flex}.quiz-form-group{box-sizing:border-box;flex-direction:column;gap:16px;width:100%;margin-top:12px;display:flex}.quiz-form-group+.quiz-form-group{border-top:1px solid #ffffff14;padding-top:24px;margin-top:32px!important}label.quiz-form-label,.quiz-form-label{color:var(--text-primary);align-items:center;gap:10px;margin-bottom:8px;font-size:.95rem;font-weight:600;display:flex}.label-icon-lucide{color:var(--brand-blue)}.quiz-topic-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;display:grid}.quiz-topic-chip{border-radius:var(--radius-md);border:1px solid var(--glass-border);color:var(--text-primary);cursor:pointer;text-align:left;transition:var(--transition-smooth);background:#ffffff0a;align-items:center;gap:12px;padding:14px;display:flex}[data-theme=light] .quiz-topic-chip{background:#0a194508}.quiz-topic-chip:hover{background:var(--glass-bg-hover);border-color:var(--brand-blue)}.quiz-topic-chip.active{background:var(--glass-bg-active);border-color:var(--brand-blue);box-shadow:0 0 16px #305cde4d}.chip-lucide-icon{color:var(--brand-blue);justify-content:center;align-items:center;display:flex}.chip-info{flex-direction:column;display:flex}.chip-title{font-size:.85rem;font-weight:500}.chip-count{color:var(--text-tertiary);font-size:.72rem;font-weight:300}.quiz-count-options,.quiz-mode-toggle{flex-wrap:wrap;gap:12px;display:flex}.quiz-count-btn,.quiz-mode-btn{border-radius:var(--radius-md);border:1px solid var(--glass-border);color:var(--text-secondary);cursor:pointer;transition:var(--transition-smooth);background:#ffffff0a;align-items:center;gap:8px;padding:11px 18px;font-size:.85rem;font-weight:400;display:inline-flex}[data-theme=light] .quiz-count-btn,[data-theme=light] .quiz-mode-btn{background:#0a194508}.quiz-count-btn:hover,.quiz-mode-btn:hover{color:var(--text-primary);border-color:var(--brand-blue)}.quiz-count-btn.active,.quiz-mode-btn.active{background:var(--brand-blue);color:var(--brand-white);border-color:var(--brand-blue);font-weight:500;box-shadow:0 4px 16px #305cde66}.quiz-setup-footer{border-top:1px solid var(--glass-border);justify-content:flex-end;padding-top:24px;display:flex;margin-top:36px!important}.glass-btn{border-radius:var(--radius-full);cursor:pointer;transition:var(--transition-spring);border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:12px 26px;font-size:.9rem;font-weight:500;display:inline-flex}.glass-btn-primary{background:var(--brand-blue);color:var(--brand-white);box-shadow:0 8px 24px #305cde73}.glass-btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px)scale(1.02);box-shadow:0 12px 30px #305cde99}.glass-btn-secondary{border-color:var(--glass-border);color:var(--text-primary);background:#ffffff14}.glass-btn-secondary:hover{background:#ffffff26}.glass-btn-outline{border-color:var(--brand-blue);color:var(--brand-blue);background:0 0}.glass-btn-outline:hover{background:#305cde26}.quiz-active-card{box-sizing:border-box;width:100%;padding:34px;position:relative}.quiz-header-bar{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.quiz-topic-tag{color:var(--brand-blue);margin-right:12px;font-size:.84rem;font-weight:500}.quiz-counter-tag{color:var(--text-tertiary);font-size:.8rem;font-weight:400}.quiz-timer-badge{border-radius:var(--radius-full);color:var(--text-accent);background:#305cde26;border:1px solid #305cde4d;align-items:center;gap:6px;padding:5px 12px;font-size:.82rem;font-weight:500;display:flex}.quiz-timer-badge.warning{color:#ef4444;background:#ef444433;border-color:#ef444480;animation:1s infinite pulse}@keyframes 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