@import"https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap";:root{--primary: #0891B2;--primary-hover: #0E7490;--primary-light: #22D3EE;--primary-glow: rgba(8, 145, 178, .2);--accent: #0ea5e9;--accent-hover: #0284c7;--accent-light: #e0f2fe;--success: #22C55E;--success-light: #4ADE80;--warning: #f59e0b;--warning-light: #fef3c7;--danger: #EF4444;--danger-hover: #dc2626;--danger-light: #fee2e2;--bg-body: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 30%, #F8FAFC 70%, #EDE9FE 100%);--bg-card: rgba(255, 255, 255, .85);--bg-hover: rgba(8, 145, 178, .08);--bg-glass: rgba(255, 255, 255, .7);--glass-border: rgba(8, 145, 178, .15);--text-main: #164E63;--text-muted: #64748B;--text-light: #94A3B8;--border: rgba(8, 145, 178, .12);--border-hover: rgba(8, 145, 178, .25);--shadow-sm: 0 2px 8px rgba(8, 145, 178, .08);--shadow-md: 0 4px 16px rgba(8, 145, 178, .12);--shadow-lg: 0 8px 32px rgba(8, 145, 178, .15);--shadow-xl: 0 16px 48px rgba(8, 145, 178, .2);--radius-sm: 8px;--radius: 14px;--radius-lg: 18px;--radius-xl: 24px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .35s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:DM Sans,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:radial-gradient(ellipse at top left,rgba(34,211,238,.2) 0%,transparent 50%),radial-gradient(ellipse at bottom right,rgba(139,92,246,.12) 0%,transparent 50%),linear-gradient(135deg,#f0f9ff,#e0f2fe 30%,#f8fafc 70%,#ede9fe);background-attachment:fixed;color:var(--text-main);line-height:1.6;overflow-x:hidden;min-height:100vh}.app-container{min-height:100vh;padding:24px;display:flex;flex-direction:column;align-items:center}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;letter-spacing:-.025em}h1{font-size:clamp(2rem,4vw,2.75rem);margin-bottom:20px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 50%,#8B5CF6 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:700;letter-spacing:-.03em;text-shadow:0 4px 24px rgba(8,145,178,.15)}h2{font-size:clamp(1.5rem,3vw,1.875rem);color:var(--primary);margin-bottom:16px;font-weight:700}h3{font-size:clamp(1.125rem,2vw,1.25rem);color:var(--text-main);margin-bottom:12px;font-weight:600}.main-container{width:100%;max-width:1400px;display:flex;flex-direction:column;gap:24px}.card{background:var(--bg-card);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:var(--radius-lg);border:1px solid var(--glass-border);box-shadow:var(--shadow-md);padding:24px;transition:all var(--transition)}.card:hover{box-shadow:var(--shadow-lg);border-color:var(--border-hover);transform:translateY(-2px)}.trainer-layout{display:flex;height:750px;min-height:750px;gap:0;background:var(--bg-card);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:var(--radius-xl);border:1px solid var(--glass-border);box-shadow:var(--shadow-xl);overflow:hidden;position:relative}.left-panel{padding:28px;overflow-y:auto;display:flex;flex-direction:column;gap:20px;background:#f8fafcb3;border-right:1px solid var(--glass-border);flex-shrink:0}.right-panel{padding:0;position:relative;background:#fff;flex:1;min-width:0;display:flex;flex-direction:column}.resizer{width:10px;background-color:var(--border);cursor:col-resize;display:flex;align-items:center;justify-content:center;transition:background-color var(--transition);position:relative;flex-shrink:0}.resizer:hover{background-color:var(--accent)}.resizer:hover:after{background-color:#fff}.resizer:after{content:"";height:40px;width:4px;background-color:#9ca3af;border-radius:2px;transition:background-color var(--transition)}.resizing{-webkit-user-select:none;user-select:none;cursor:col-resize}.resizing .calculator-container,.resizing .calculator-container *{pointer-events:none!important}.calculator-container{position:relative;width:100%;height:100%;overflow:hidden;background:#fff;flex:1}.calculator-wrapper{width:100%!important;height:100%!important;min-height:100%;position:relative}.calculator-wrapper>div{width:100%!important;height:100%!important}.reset-button-overlay{position:absolute;top:10px;right:10px;z-index:100}.reset-btn{background:#fff;border:2px solid var(--border);border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:20px;color:var(--text-muted);box-shadow:var(--shadow-md);transition:all var(--transition)}.reset-btn:hover{background:var(--danger);color:#fff;border-color:var(--danger);transform:rotate(90deg)}.btn{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff;border:none;padding:12px 24px;border-radius:var(--radius);font-weight:600;font-size:14px;cursor:pointer;transition:all var(--transition);box-shadow:0 4px 16px #0891b24d;font-family:DM Sans,sans-serif;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px #0891b266}.btn:active{transform:translateY(0)}.btn-danger{background:linear-gradient(135deg,var(--danger) 0%,#F87171 100%);box-shadow:0 4px 16px #ef44444d}.btn-danger:hover{box-shadow:0 8px 24px #ef444466}.btn-outline{background:var(--bg-glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:2px solid var(--primary);color:var(--primary);box-shadow:none}.btn-outline:hover{background:var(--primary);color:#fff;box-shadow:0 4px 16px #0891b24d}.btn-800{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);border:none;box-shadow:0 4px 20px #0891b266;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-800:hover{box-shadow:0 8px 28px #0891b280}input[type=text]{padding:12px;border:2px solid var(--border);background:#fff;border-radius:var(--radius-sm);font-size:1rem;width:200px;font-family:Inter,sans-serif;transition:all var(--transition)}input[type=text]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}input[type=text]::placeholder{color:var(--text-light)}.category-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer;-webkit-user-select:none;user-select:none}.category-header:hover h3{color:var(--primary-hover)}.category-selection{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px;margin-top:15px;max-height:300px;overflow-y:auto;padding:5px}.cat-item{display:flex;align-items:flex-start;gap:8px;padding:8px;border-radius:var(--radius-sm);background:#f9fafb;border:1px solid var(--border);transition:all var(--transition)}.cat-item:hover{background:#f3f4f6;border-color:var(--primary-light);transform:translate(2px)}.cat-item input[type=checkbox]{margin-top:2px;width:16px;height:16px;cursor:pointer;accent-color:var(--primary)}.cat-item label{cursor:pointer;font-size:.9rem;line-height:1.4}.category-buttons{margin-top:15px;display:flex;gap:10px;justify-content:center}.badge{padding:2px 8px;border-radius:12px;font-size:.75rem;font-weight:700;margin-right:6px;text-transform:uppercase}.badge-easy{background:#d1fae5;color:#065f46}.badge-medium{background:#ffedd5;color:#9a3412}.badge-hard{background:#fee2e2;color:#991b1b}.question-box{font-size:1.2rem;line-height:1.6;text-align:center;min-height:100px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(135deg,#f8fafc,#f1f5f9);border:1px dashed #cbd5e1;border-radius:var(--radius);padding:20px;transition:all var(--transition);overflow-wrap:break-word;word-break:break-word;width:100%;max-width:100%;overflow-x:auto}.question-box:hover{border-color:var(--primary);background:linear-gradient(135deg,#f8fafc,#eef2ff);box-shadow:0 4px 12px #4f46e51a}.category-title{color:var(--accent);font-size:1rem;margin-bottom:12px;font-weight:600}.input-area{display:flex;gap:10px;justify-content:center;align-items:center}.result-area{min-height:40px;font-size:1.5rem;font-weight:700;text-align:center;margin-top:10px;transition:all var(--transition)}.result-area.success{color:var(--success)}.result-area.error{color:var(--danger);animation:shake .5s ease-in-out}.result-area.warning{color:var(--warning)}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-4px)}20%,40%,60%,80%{transform:translate(4px)}}.tips-list{padding-left:20px;color:var(--text-muted);line-height:1.5}.tips-list li{margin-bottom:8px}.stopwatch{position:fixed;top:20px;right:20px;background:#fff;padding:8px 16px;border-radius:20px;font-weight:700;box-shadow:var(--shadow-md);font-family:JetBrains Mono,monospace;font-size:1.2rem;z-index:100;border:1px solid var(--border)}.help-button{position:fixed;top:20px;left:20px;width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;font-weight:700;font-size:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-md);z-index:100;transition:transform var(--transition);border:none}.help-button:hover{transform:scale(1.1)}.correct-counter{font-size:1.1rem;background:linear-gradient(135deg,#dcfce7,#bbf7d0);color:#166534;padding:10px 28px;border-radius:50px;margin-bottom:12px;display:inline-flex;align-items:center;gap:8px;font-weight:700;border:1px solid var(--success);box-shadow:0 4px 16px #22c55e33}.streak{margin-left:12px;color:#f59e0b;font-weight:700}.control-buttons{text-align:center;padding:10px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.times-list{list-style:none;padding:0}.times-list li{border-bottom:1px solid var(--border);padding:8px 0}.explanation-img{width:100%;height:auto;border-radius:var(--radius)}.help-content p{margin-bottom:10px}.help-content ul{margin-left:20px}.help-content li{margin-bottom:5px}.left-panel::-webkit-scrollbar,.category-selection::-webkit-scrollbar{width:8px}.left-panel::-webkit-scrollbar-track,.category-selection::-webkit-scrollbar-track{background:#f1f1f1;border-radius:4px}.left-panel::-webkit-scrollbar-thumb,.category-selection::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.left-panel::-webkit-scrollbar-thumb:hover,.category-selection::-webkit-scrollbar-thumb:hover{background:#555}@media(max-width:900px){.trainer-layout{flex-direction:column;height:auto}.resizer{width:100%;height:5px;cursor:row-resize}.resizer:after{width:40px;height:4px}.left-panel{width:100%!important;height:auto!important;border-right:none;border-bottom:1px solid var(--border)}.right-panel{width:100%!important;height:500px!important}.input-area{flex-direction:column}input[type=text]{width:100%}.control-buttons{flex-direction:column}.control-buttons .btn{width:100%}}hr{border:0;border-top:1px solid var(--border);width:100%;margin:16px 0}.aq-layout{--aq-primary: #0891B2;--aq-primary-light: #22D3EE;--aq-primary-dark: #0E7490;--aq-secondary: #06B6D4;--aq-success: #22C55E;--aq-success-light: #4ADE80;--aq-danger: #EF4444;--aq-warning: #F59E0B;--aq-bg-gradient-start: #ECFEFF;--aq-bg-gradient-mid: #F0FDFA;--aq-bg-gradient-end: #F5F3FF;--aq-text-dark: #164E63;--aq-text-muted: #0E7490;--aq-glass-bg: rgba(255, 255, 255, .7);--aq-glass-border: rgba(8, 145, 178, .15);--aq-glass-shadow: 0 8px 32px rgba(8, 145, 178, .12);--aq-transition: all .3s cubic-bezier(.4, 0, .2, 1)}.aq-layout{position:fixed;top:0;left:0;right:0;bottom:0;display:flex;background:radial-gradient(ellipse at top left,rgba(34,211,238,.15) 0%,transparent 50%),radial-gradient(ellipse at bottom right,rgba(139,92,246,.1) 0%,transparent 50%),linear-gradient(135deg,var(--aq-bg-gradient-start) 0%,var(--aq-bg-gradient-mid) 50%,var(--aq-bg-gradient-end) 100%);z-index:1000;font-family:DM 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8px;border-radius:6px}.aq-sidebar-hide:hover{color:var(--aq-primary);background:#0891b21a}.aq-sidebar-grid{flex:1;overflow-y:auto;padding:16px;display:grid;grid-template-columns:repeat(5,1fr);gap:8px;align-content:start}.aq-sidebar-item{width:100%;aspect-ratio:1;border-radius:10px;border:1px solid rgba(8,145,178,.1);background:#fff;font-size:12px;font-weight:600;color:var(--aq-text-dark);cursor:pointer;transition:var(--aq-transition);display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px #0000000a}.aq-sidebar-item:hover{background:linear-gradient(135deg,#ecfeff,#cffafe);border-color:var(--aq-primary-light);transform:translateY(-2px);box-shadow:0 4px 12px #0891b226}.aq-sidebar-item.current{background:linear-gradient(135deg,var(--aq-primary) 0%,var(--aq-primary-dark) 100%);color:#fff;border-color:transparent;box-shadow:0 4px 16px 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.aq-opt-icon{opacity:1}.aq-input-section{display:flex;flex-direction:column;gap:14px}.aq-answer-input{padding:16px 20px;border:2px solid rgba(8,145,178,.15);border-radius:14px;font-size:17px;font-weight:500;width:100%;transition:var(--aq-transition);background:#fff}.aq-answer-input:focus{outline:none;border-color:var(--aq-primary);box-shadow:0 0 0 4px #0891b226}.aq-answer-input.correct{border-color:var(--aq-success);background:linear-gradient(135deg,#dcfce7,#f0fdf4);box-shadow:0 0 0 4px #22c55e26}.aq-answer-input.incorrect{border-color:var(--aq-danger);background:linear-gradient(135deg,#fecaca,#fef2f2);box-shadow:0 0 0 4px #ef444426}.aq-correct-ans{color:var(--aq-success);font-weight:600;font-size:15px}.aq-feedback{margin-top:24px;padding:20px 32px;border-radius:16px;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;gap:12px}.aq-feedback svg{flex-shrink:0}@keyframes 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