:root{--bg-primary: #0a0e1a;--bg-secondary: #111827;--bg-card: #1a1f35;--bg-card-hover: #222845;--text-primary: #f0f2f5;--text-secondary: #9ca3b0;--text-muted: #636b7d;--accent-blue: #3b82f6;--accent-blue-glow: rgba(59, 130, 246, .3);--accent-green: #22c55e;--accent-green-glow: rgba(34, 197, 94, .15);--accent-yellow: #eab308;--accent-yellow-glow: rgba(234, 179, 8, .15);--accent-red: #ef4444;--accent-red-glow: rgba(239, 68, 68, .15);--accent-purple: #a855f7;--border: rgba(255, 255, 255, .06);--border-hover: rgba(255, 255, 255, .12);--gradient-blue: linear-gradient(135deg, #3b82f6, #6366f1);--gradient-green: linear-gradient(135deg, #22c55e, #06b6d4);--gradient-card: linear-gradient(145deg, rgba(30, 35, 60, .8), rgba(20, 25, 45, .5));--radius: 12px;--radius-sm: 8px;--radius-lg: 16px;--radius-xl: 20px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(59, 130, 246, .15)}[data-theme=light]{--bg-primary: #f5f7fa;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-card-hover: #f0f4f8;--text-primary: #1a202c;--text-secondary: #64748b;--text-muted: #94a3b8;--border: rgba(0, 0, 0, .08);--border-hover: rgba(0, 0, 0, .15);--gradient-card: linear-gradient(145deg, rgba(255, 255, 255, .9), rgba(248, 250, 252, .8));--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12);--shadow-glow: 0 0 20px rgba(59, 130, 246, .1)}[data-theme=light] body:before{background:radial-gradient(ellipse at 20% 20%,rgba(59,130,246,.04) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(139,92,246,.03) 0%,transparent 50%)}[data-theme=light] .form-control{background:#00000008}[data-theme=light] .variant-btn{background:#00000005}[data-theme=light] .q-dot{background:#0000000a}[data-theme=light] .test-bottom-bar{background:#fffffff2}[data-theme=light] .btn-nav{background:#0000000a}[data-theme=light] .lang-toggle{background:#0000000d}[data-theme=light] .navbar{background:#ffffffe6;border-bottom-color:#00000014}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(ellipse at 20% 20%,rgba(59,130,246,.06) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(139,92,246,.04) 0%,transparent 50%);pointer-events:none;z-index:0}#root{position:relative;z-index:1}.container{max-width:960px;margin:0 auto;padding:0 20px}.navbar{background:#111827cc;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:16px 0;position:sticky;top:0;z-index:100}.navbar .container{display:flex;align-items:center;justify-content:space-between}.navbar-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-primary)}.navbar-brand .logo-icon{width:36px;height:36px;border-radius:8px}.navbar-brand h1{font-size:20px;font-weight:700;background:var(--gradient-blue);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-nav{display:flex;gap:4px;list-style:none}.navbar-nav a{text-decoration:none;color:var(--text-secondary);padding:8px 16px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;transition:all .2s}.navbar-nav a:hover,.navbar-nav a.active{color:var(--text-primary);background:#3b82f61a}.navbar-user{display:flex;align-items:center;gap:12px}.navbar-user span{font-size:14px;color:var(--text-secondary)}.btn-logout{background:none;border:1px solid var(--border);color:var(--text-secondary);padding:6px 14px;border-radius:var(--radius-sm);font-size:13px;cursor:pointer;transition:all .2s}.btn-logout:hover{border-color:var(--accent-red);color:var(--accent-red)}.theme-toggle{background:none;border:1px solid var(--border);width:36px;height:36px;border-radius:50%;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.theme-toggle:hover{border-color:var(--accent-blue);transform:scale(1.1)}.login-page{display:flex;min-height:100vh}.login-features{flex:1;background:linear-gradient(135deg,#dbeafe,#eff6ff,#f0fdfa);display:flex;align-items:center;justify-content:center;padding:48px}.login-features-content{max-width:480px}.login-features-content h1{font-size:32px;font-weight:800;color:#1e3a5f;margin-bottom:12px}.login-subtitle{color:#475569;font-size:15px;line-height:1.6;margin-bottom:28px}.features-list{display:flex;flex-direction:column;gap:12px;margin-bottom:32px}.feature-item{display:flex;align-items:center;gap:12px;background:#ffffffb3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:12px 18px;border-radius:12px;border:1px solid rgba(59,130,246,.15);transition:transform .2s}.feature-item:hover{transform:translate(4px)}.feature-icon{font-size:18px;flex-shrink:0}.feature-text{font-size:14px;font-weight:600;color:#1e3a5f}.feature-banner{display:flex;align-items:center;gap:16px;background:#fff9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:20px;border-radius:16px;border:1px solid rgba(59,130,246,.1)}.feature-banner img{width:80px;height:80px;object-fit:cover;border-radius:12px}.feature-banner strong{display:block;font-size:16px;color:#1e3a5f;margin-bottom:4px}.feature-banner p{font-size:13px;color:#64748b;line-height:1.4;margin:0}.login-form-side{flex:1;display:flex;align-items:center;justify-content:center;padding:48px;background:var(--bg-primary)}.login-card{background:var(--gradient-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:48px;width:100%;max-width:440px;box-shadow:var(--shadow-lg)}.login-card .logo{text-align:center;margin-bottom:32px}.login-card .logo h2{font-size:22px;font-weight:800;color:var(--text-primary);margin-bottom:10px}.login-card .logo p{color:var(--text-secondary);font-size:14px;line-height:1.5}.form-hint{display:block;font-size:12px;color:var(--text-muted);margin-top:6px}@media(max-width:900px){.login-page{flex-direction:column}.login-features{padding:32px 24px}.login-features-content h1{font-size:24px}.login-form-side,.login-card{padding:32px 24px}}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.form-control{width:100%;padding:14px 16px;background:#0000004d;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:15px;font-family:inherit;transition:all .2s;outline:none}.form-control:focus{border-color:var(--accent-blue);box-shadow:0 0 0 3px var(--accent-blue-glow)}.form-control::placeholder{color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 24px;border-radius:var(--radius);font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s;border:none;outline:none;text-decoration:none}.btn-primary{background:var(--gradient-blue);color:#fff;width:100%;box-shadow:0 4px 16px #3b82f64d}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 24px #3b82f666}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.telegram-login-divider{display:flex;align-items:center;gap:12px;margin:20px 0;color:var(--text-muted);font-size:13px}.telegram-login-divider:before,.telegram-login-divider:after{content:"";flex:1;height:1px;background:var(--border)}.telegram-login-widget{display:flex;justify-content:center;min-height:40px}.social-login-buttons{display:flex;flex-direction:column;align-items:center;gap:12px;margin-bottom:8px}.google-login-widget{display:flex;justify-content:center;min-height:44px}.btn-secondary{background:#ffffff0d;border:1px solid var(--border);color:var(--text-primary)}.btn-secondary:hover{background:#ffffff1a;border-color:var(--border-hover)}.error-message{background:var(--accent-red-glow);border:1px solid rgba(239,68,68,.3);color:var(--accent-red);padding:12px 16px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:20px}.page-header{padding:32px 0 24px}.page-header h2{font-size:28px;font-weight:800;margin-bottom:4px}.page-header p{color:var(--text-secondary);font-size:15px}.tests-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;padding-bottom:40px}.test-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 16px;text-align:center;cursor:pointer;transition:all .25s;text-decoration:none;color:var(--text-primary);position:relative;overflow:hidden}.test-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-blue);opacity:0;transition:opacity .25s}.test-card:hover{border-color:var(--border-hover);transform:translateY(-2px);box-shadow:var(--shadow-glow)}.test-card:hover:before{opacity:1}.test-card .number{font-size:28px;font-weight:800;margin-bottom:8px;background:var(--gradient-blue);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.test-card .score{font-size:12px;color:var(--text-secondary);font-weight:500}.test-card.perfect{border-color:#22c55e4d;background:linear-gradient(145deg,rgba(34,197,94,.08),var(--bg-card))}.test-card.perfect .number{background:var(--gradient-green);-webkit-background-clip:text;background-clip:text}.test-card.perfect:before{background:var(--gradient-green);opacity:1}.test-card.attempted{border-color:#eab30833;background:linear-gradient(145deg,rgba(234,179,8,.05),var(--bg-card))}.test-card.attempted .number{background:linear-gradient(135deg,#eab308,#f59e0b);-webkit-background-clip:text;background-clip:text}.test-card.attempted:before{background:linear-gradient(135deg,#eab308,#f59e0b);opacity:1}.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:32px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;text-align:center}.stat-card .value{font-size:36px;font-weight:800;margin-bottom:6px}.stat-card .label{font-size:13px;color:var(--text-secondary);font-weight:500;text-transform:uppercase;letter-spacing:.5px}.stat-card.blue .value{color:var(--accent-blue)}.stat-card.green .value{color:var(--accent-green)}.stat-card.yellow .value{color:var(--accent-yellow)}.stat-card.red .value{color:var(--accent-red)}.stat-card.purple .value{color:var(--accent-purple)}.test-page{padding-bottom:100px}.test-header{padding:24px 0;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);margin-bottom:24px}.test-header h2{font-size:22px;font-weight:700}.test-progress{display:flex;align-items:center;gap:12px}.progress-bar{width:120px;height:6px;background:#ffffff0f;border-radius:100px;overflow:hidden}.progress-bar .fill{height:100%;background:var(--gradient-blue);border-radius:100px;transition:width .3s ease}.progress-text{font-size:14px;color:var(--text-secondary);font-weight:600}.question-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;margin-bottom:24px;animation:fadeSlideIn .3s ease}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.question-number{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--gradient-blue);color:#fff;border-radius:50%;font-size:14px;font-weight:700;margin-bottom:16px}.question-text{font-size:17px;font-weight:500;line-height:1.7;margin-bottom:20px}.question-image{margin:0 auto 20px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);max-width:500px;text-align:center}.question-image img{width:100%;display:block;cursor:zoom-in}.lightbox-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000e6;display:flex;align-items:center;justify-content:center;z-index:9999;cursor:zoom-out;animation:fadeIn .2s ease;padding:20px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.lightbox-overlay img{max-width:90vw;max-height:90vh;object-fit:contain;border-radius:var(--radius);box-shadow:0 20px 60px #00000080}.lightbox-close{position:absolute;top:20px;right:20px;width:44px;height:44px;border-radius:50%;border:none;background:#ffffff26;color:#fff;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.lightbox-close:hover{background:#ffffff4d}.variants-list{display:flex;flex-direction:column;gap:10px}.variant-btn{display:flex;align-items:flex-start;gap:14px;padding:16px 20px;background:#0003;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:15px;font-family:inherit;text-align:left;cursor:pointer;transition:all .2s;line-height:1.5;width:100%}.variant-btn:hover{border-color:var(--accent-blue);background:#3b82f60f}.variant-btn.selected{border-color:var(--accent-blue);background:#3b82f61a;box-shadow:0 0 0 2px var(--accent-blue-glow)}.variant-btn.correct{border-color:var(--accent-green);background:#22c55e1a}.variant-btn.incorrect{border-color:var(--accent-red);background:#ef44441a}.variant-btn.show-correct{border-color:var(--accent-green);background:#22c55e14}.variant-letter{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:28px;border-radius:50%;border:1px solid var(--border);font-size:13px;font-weight:700;color:var(--text-secondary);flex-shrink:0;margin-top:1px}.variant-btn.selected .variant-letter{background:var(--accent-blue);border-color:var(--accent-blue);color:#fff}.variant-btn.correct .variant-letter{background:var(--accent-green);border-color:var(--accent-green);color:#fff}.variant-btn.incorrect .variant-letter{background:var(--accent-red);border-color:var(--accent-red);color:#fff}.variant-btn.show-correct .variant-letter{background:var(--accent-green);border-color:var(--accent-green);color:#fff}.question-nav{display:flex;flex-wrap:wrap;gap:6px;padding:16px 0;margin-bottom:16px}.q-dot{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:#0003;color:var(--text-secondary);font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.q-dot:hover{border-color:var(--accent-blue)}.q-dot.current{background:var(--accent-blue);color:#fff;border-color:var(--accent-blue)}.q-dot.answered{background:#3b82f626;border-color:#3b82f666;color:var(--accent-blue)}.q-dot.correct-dot{background:#22c55e26;border-color:#22c55e66;color:var(--accent-green)}.q-dot.incorrect-dot{background:#ef444426;border-color:#ef444466;color:var(--accent-red)}.test-bottom-bar{position:fixed;bottom:0;left:0;right:0;background:#111827f2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:1px solid var(--border);padding:16px 20px;z-index:100}.test-bottom-bar .container{display:flex;align-items:center;justify-content:space-between}.btn-nav{padding:10px 24px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;border:1px solid var(--border);background:#ffffff0d;color:var(--text-primary);font-family:inherit}.btn-nav:hover{background:#ffffff1a}.btn-submit{background:var(--gradient-green);border:none;color:#fff;padding:10px 28px;border-radius:var(--radius-sm);font-size:14px;font-weight:700;cursor:pointer;font-family:inherit;box-shadow:0 4px 16px #22c55e4d;transition:all .2s}.btn-submit:hover{transform:translateY(-1px);box-shadow:0 6px 24px #22c55e66}.settings-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000b3;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;z-index:500;padding:20px;animation:fadeIn .3s ease}.settings-card{background:var(--gradient-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px;width:100%;max-width:460px;box-shadow:var(--shadow-lg);text-align:center}.settings-icon{font-size:48px;margin-bottom:8px}.settings-card h2{font-size:22px;font-weight:800;margin-bottom:28px;color:var(--text-primary)}.settings-list{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}.setting-item{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#0003;border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;text-align:left}[data-theme=light] .setting-item{background:#00000008}.setting-info{display:flex;align-items:flex-start;gap:12px;flex:1}.setting-emoji{font-size:22px;flex-shrink:0;margin-top:2px}.setting-info strong{display:block;font-size:14px;font-weight:700;color:var(--text-primary);margin-bottom:4px}.setting-info p{font-size:12px;color:var(--text-secondary);line-height:1.4;margin:0}.toggle-switch{position:relative;width:48px;height:26px;border-radius:100px;border:none;background:#ffffff1a;cursor:pointer;flex-shrink:0;transition:background .3s;padding:0}[data-theme=light] .toggle-switch{background:#0000001f}.toggle-switch.on{background:var(--accent-blue)}.toggle-knob{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .3s;box-shadow:0 1px 4px #0000004d}.toggle-switch.on .toggle-knob{transform:translate(22px)}.settings-start{margin-bottom:16px}.settings-back{background:none;border:none;color:var(--text-secondary);font-size:14px;font-family:inherit;cursor:pointer;padding:8px 16px;transition:color .2s}.settings-back:hover{color:var(--text-primary)}@media(max-width:768px){.settings-card{padding:28px 20px}}.result-hero{text-align:center;padding:48px 0 32px}.result-score{font-size:72px;font-weight:800;margin-bottom:8px}.result-score.pass{background:var(--gradient-green);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.result-score.fail{background:linear-gradient(135deg,var(--accent-red),#f97316);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.result-label{color:var(--text-secondary);font-size:16px;margin-bottom:24px}.result-actions{display:flex;gap:12px;justify-content:center;margin-bottom:32px}.lang-toggle{display:flex;background:#0000004d;border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;flex-shrink:0}.lang-btn{padding:8px 16px;font-size:13px;font-weight:600;border:none;background:none;color:var(--text-secondary);cursor:pointer;transition:all .2s;font-family:inherit}.lang-btn.active{background:var(--accent-blue);color:#fff}.loading{display:flex;align-items:center;justify-content:center;padding:80px 0;color:var(--text-secondary);font-size:16px;gap:12px}.spinner{width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--accent-blue);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:768px){.navbar .container{flex-wrap:wrap;gap:8px}.navbar-nav{order:3;width:100%;justify-content:center}.tests-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}.test-card .number{font-size:22px}.test-card{padding:14px 10px}.stats-grid{grid-template-columns:1fr 1fr;gap:10px}.question-card{padding:20px}.login-card{padding:32px 24px}.stat-card .value{font-size:28px}}.page-tabs{display:flex;gap:4px;margin:24px 0 8px;background:var(--surface);border-radius:12px;padding:4px;border:1px solid var(--border)}.page-tab{flex:1;padding:12px 20px;border:none;background:transparent;color:var(--text-muted);font-size:15px;font-weight:600;border-radius:10px;cursor:pointer;transition:all .2s}.page-tab:hover{color:var(--text-primary);background:var(--bg-primary)}.page-tab.active{background:var(--gradient-blue);color:#fff;box-shadow:0 2px 8px #6366f14d}.categories-grid{display:flex;flex-direction:column;gap:8px}.category-card{display:flex;align-items:center;gap:16px;padding:16px 20px;background:var(--surface);border:1px solid var(--border);border-radius:12px;text-decoration:none;color:var(--text-primary);transition:all .2s}.category-card:hover{border-color:var(--accent-blue);transform:translate(4px);box-shadow:0 4px 12px #6366f126}.category-order{width:40px;height:40px;border-radius:10px;background:var(--gradient-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}.category-info{flex:1;min-width:0}.category-name{font-weight:600;font-size:14px;line-height:1.4;margin-bottom:2px}.category-count{font-size:12px;color:var(--text-muted)}.category-arrow{font-size:18px;color:var(--text-muted);flex-shrink:0;transition:transform .2s}.category-card:hover .category-arrow{transform:translate(4px);color:var(--accent-blue)}.category-progress{display:flex;align-items:center;gap:8px;margin-top:4px}.category-progress-bar{flex:1;height:4px;background:var(--border);border-radius:2px;overflow:hidden}.category-progress-fill{height:100%;background:var(--gradient-blue);border-radius:2px;transition:width .3s ease}.category-percent{font-size:11px;font-weight:600;color:var(--text-muted);min-width:30px;text-align:right}