:root,[data-theme=dark]{--bg-image-fallback:radial-gradient(circle at 15% 50%, #67e8f90a, transparent 25%), radial-gradient(circle at 85% 30%, #ffffff05, transparent 25%);--bg-body:#070b11;--bg-overlay:#02050ae0;--bg-glass:#080e14eb;--bg-glass-hover:#101824f2;--primary-50:#67e8f90d;--primary-500:#67e8f9;--primary-600:#22d3ee;--primary-glow:0 0 15px #67e8f933;--text-main:#f0f9ff;--text-secondary:#f0f9ffa6;--text-inverse:#070b11;--text-muted:#f0f9ff59;--success:#4ade80;--success-bg:#4ade801f;--error:#f87171;--error-bg:#f871711f;--warning:#fb923c;--border-glass:#f0f9ff14;--backdrop-blur:blur(12px);--radius-none:0px;--radius-xs:4px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:999px;--elevation-1:0 1px 3px #0006, 0 1px 2px #0000004d;--elevation-2:0 3px 6px #0006, 0 2px 4px #0000004d;--elevation-3:0 8px 16px #0006, 0 4px 8px #0003;--header-height:48px;--header-height-mobile:44px;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:48px;--space-3xl:64px;--surface:#121212fa;--surface-container:#1c1c1cf2;--surface-high:#282828eb;--on-surface-variant:#fff9;--font-sans:"Inter", system-ui, -apple-system, sans-serif;--font-mono:"JetBrains Mono", monospace;--font-h1:clamp(1.5rem, 3vw, 1.75rem);--font-h2:clamp(1.15rem, 2.5vw, 1.35rem);--font-h3:clamp(.95rem, 2vw, 1.05rem);--font-body:clamp(.85rem, 1.5vw, .9rem);--font-small:.75rem;--font-tiny:.7rem;--transition-fast:.15s ease;--ease-out-expo:cubic-bezier(.19, 1, .22, 1)}[data-theme=light]{--primary-500:#0e7490;--primary-600:#155e75;--primary-glow:0 0 12px #0e749033;--primary-50:#0e74900f;--text-main:#0c1a22;--text-secondary:#000000a6;--text-muted:#0000006b;--text-inverse:#fff;--bg-glass:#ffffffe0;--bg-glass-hover:#fffffff7;--surface:#edf4f8fa;--surface-container:#dcebf2f5;--surface-high:#c8dceaf0;--border-glass:#0000001a;--bg-overlay:#c8dce8cc;--success:#15803d;--success-bg:#15803d1a;--error:#dc2626;--error-bg:#dc26261a;--warning:#c2410c;--elevation-1:0 1px 3px #00000014, 0 1px 2px #0000000d;--elevation-2:0 3px 6px #00000014, 0 2px 4px #0000000d;--elevation-3:0 8px 16px #00000014, 0 4px 8px #0000000a}[data-theme=light] body{background-color:#b8ceae}[data-theme=light] .header{background:#e6f2f8f7;border-bottom:1px solid #0000000f}[data-theme=light] .neon-text{color:var(--primary-500);text-shadow:none}[data-theme=light] .logo-abbr .q{color:var(--text-main)}[data-theme=light] .logo-abbr .l{color:var(--primary-500);text-shadow:none}[data-theme=light] .btn-primary{color:#fff;box-shadow:0 0 10px #0e74902e}[data-theme=light] .btn-primary:hover{background:var(--primary-600);color:#fff;box-shadow:0 4px 12px #0e749047}[data-theme=light] .btn-secondary{color:var(--text-main);border-color:var(--border-glass);background:#0000000d}[data-theme=light] .btn-secondary:hover{background:#00000017}[data-theme=light] .btn-ghost{color:var(--text-secondary)}[data-theme=light] .btn-ghost:hover{color:var(--primary-500);filter:none;background:#0e749012}[data-theme=light] .question-text{color:var(--text-main)}[data-theme=light] .alternative{background:#00000005}[data-theme=light] .alternative:hover:not(.disabled){background:#0e74900d}[data-theme=light] .modal-card{background:#fff}[data-theme=light] .modal-overlay{background:#00000073}[data-theme=light] .toast{color:var(--text-main);background:#fff;box-shadow:0 10px 30px #0000001f}[data-theme=light] .input-field{color:var(--text-main);background-color:#fffc}[data-theme=light] .input-field::placeholder{color:var(--text-muted)}[data-theme=light] .feedback-message.correct{background:var(--success-bg);color:var(--success);border-color:var(--success)}[data-theme=light] .feedback-message.incorrect{background:var(--error-bg);color:var(--error);border-color:var(--error)}[data-theme=light] .badge{color:var(--primary-500);background:#0e749014;border-color:#0e749040}[data-theme=light] .progress-track{background:#00000014}*{box-sizing:border-box;-webkit-font-smoothing:antialiased;margin:0;padding:0}html,body{max-width:100vw;overflow-x:hidden}body{font-family:var(--font-sans);background-color:var(--bg-body);background-image:var(--bg-image-fallback);background-image:linear-gradient(var(--bg-overlay), var(--bg-overlay)), url(./background-IxCOjpx3.jpg), var(--bg-image-fallback);color:var(--text-main);min-height:100vh;padding-top:calc(var(--header-height-mobile) + var(--space-lg));line-height:1.4;font-size:var(--font-body);background-position:50%;background-size:cover;background-attachment:scroll;position:relative}body:before{display:none}h1,h2,h3{letter-spacing:-.02em;line-height:1.2}.neon-text{color:var(--primary-500);text-shadow:var(--primary-glow)}.container{width:100%;max-width:var(--container-width);padding:0 var(--space-lg);flex-direction:column;margin:0 auto;display:flex}.content{width:100%;max-width:900px;padding-bottom:var(--space-2xl);min-width:0;margin:0 auto}.header{z-index:1000;-webkit-backdrop-filter:var(--backdrop-blur);box-shadow:var(--elevation-2);width:100%;max-width:100%;height:var(--header-height-mobile);padding:0 var(--space-md);transition:all .3s var(--ease-out-expo);background:#050505f2;border-bottom:none;border-radius:0;justify-content:space-between;align-items:center;display:flex;position:fixed;top:0;left:50%;transform:translate(-50%)}.header.header-hidden{transform:translate(-50%,-100%)}.header-brand{align-items:center;gap:var(--space-sm);color:var(--text-main);letter-spacing:-.02em;cursor:pointer;font-size:.95rem;font-weight:800;line-height:1;display:flex}.icon-logo{width:20px;height:20px}.logo-container{height:auto;min-height:1.2rem;font-family:var(--font-mono);align-items:center;display:inline-flex;position:relative}.logo-full{white-space:nowrap;border-right:2px solid var(--primary-500);width:0;animation:2s steps(7,end) forwards typing,.8s step-end infinite blink,.5s 4s forwards hideFull;display:inline-block;overflow:hidden}.logo-abbr{opacity:0;font-weight:800;animation:.5s 4.5s forwards showAbbr;display:flex;position:absolute;left:0}.logo-abbr .q{color:#fff}.logo-abbr .l{color:var(--primary-500);text-shadow:var(--primary-glow)}@keyframes typing{0%{width:0}to{width:100%}}@keyframes blink{0%,to{border-color:#0000}50%{border-color:var(--primary-500)}}@keyframes hideFull{to{opacity:0;visibility:hidden;width:0}}@keyframes showAbbr{to{opacity:1}}.header-subtitle{font-family:var(--font-mono);font-size:var(--font-tiny);color:var(--primary-500);border-radius:var(--radius-sm);background:#c4ff000d;border:1px solid #c4ff004d;padding:1px 8px}.btn{justify-content:center;align-items:center;gap:var(--space-sm);border-radius:var(--radius-full);cursor:pointer;font-size:.8rem;font-weight:600;font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.01em;white-space:nowrap;text-align:center;min-height:40px;transition:all var(--transition-fast);border:none;flex-shrink:0;padding:10px 24px;line-height:1.2;display:inline-flex;position:relative;overflow:hidden}.btn-primary{background:var(--primary-500);color:var(--text-inverse);box-shadow:var(--primary-glow)}.btn-primary:hover{background:#fff;transform:translateY(-1px);box-shadow:0 4px 15px #ffffff4d}.btn-secondary{color:var(--text-main);border:1px solid var(--border-glass);background:#ffffff14}.btn-secondary:hover{border-color:var(--text-secondary);background:#ffffff1f}.btn-outline{border:1px solid var(--primary-500);color:var(--primary-500);background:0 0}.btn-outline:hover{background:var(--primary-500);color:var(--text-inverse)}.btn-ghost{color:var(--text-secondary);padding:var(--space-sm);border-radius:var(--radius-md);background:0 0;justify-content:center;align-items:center;min-height:40px;display:inline-flex}.btn-ghost:hover{color:var(--primary-500);filter:drop-shadow(0 0 8px var(--primary-500));background:#ffffff0d}.header .btn{width:auto;min-width:40px;height:auto;min-height:40px;padding:0 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