.header{background:#fff;box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffff2}.nav{display:flex;align-items:center;justify-content:space-between;padding:1rem 0}.logo{display:flex;align-items:center;gap:.75rem;font-size:1.5rem;font-weight:700;color:var(--primary);text-decoration:none;transition:all var(--transition-base)}.logo:hover{transform:scale(1.05)}.logo-text{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;align-items:center;gap:1.5rem}.nav-link{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;color:var(--text);font-weight:500;border-radius:var(--radius-md);transition:all var(--transition-base)}.nav-link:hover{background:var(--surface);color:var(--primary)}@media (max-width: 768px){.logo{font-size:1.25rem}.logo svg{width:24px;height:24px}.nav-link span{display:none}}.card{background:#fff;border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:var(--shadow-base);transition:all var(--transition-base)}.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}@media (max-width: 768px){.card{padding:var(--spacing-lg)}}.tool-card-link{text-decoration:none;color:inherit;display:block}.tool-card{height:100%;display:flex;flex-direction:column;gap:1rem;position:relative;overflow:hidden}.tool-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),var(--secondary),var(--accent));opacity:0;transition:opacity var(--transition-base)}.tool-card:hover:before{opacity:1}.tool-card-icon{display:flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--primary-light) 0%,var(--primary) 100%);color:#fff;transition:transform var(--transition-base)}.tool-card:hover .tool-card-icon{transform:scale(1.1) rotate(5deg)}.tool-card-title{font-size:1.25rem;font-weight:600;color:var(--text);margin:0}.tool-card-description{color:var(--text-secondary);font-size:.9375rem;line-height:1.6;flex-grow:1;margin:0}.tool-card-footer{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;margin-top:auto}.tool-card-tags{display:flex;flex-wrap:wrap;gap:.5rem}.tool-card-tag{padding:.25rem .75rem;background:var(--surface);color:var(--text-secondary);font-size:.75rem;border-radius:var(--radius-md);font-weight:500}.tool-card-arrow{color:var(--primary);transition:transform var(--transition-base);flex-shrink:0}.tool-card:hover .tool-card-arrow{transform:translate(4px)}@media (max-width: 768px){.tool-card{gap:.75rem}.tool-card-icon{width:56px;height:56px}.tool-card-title{font-size:1.125rem}.tool-card-description{font-size:.875rem}}.input-wrapper{display:flex;flex-direction:column;gap:.5rem;margin-bottom:var(--spacing-md)}.input-label{font-size:.875rem;font-weight:500;color:var(--text)}.input{width:100%;padding:.75rem 1rem;font-size:1rem;border:2px solid #e5e7eb;border-radius:var(--radius-md);background:#fff;color:var(--text);transition:all var(--transition-base)}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #6366f11a}.input:disabled{background:var(--surface);cursor:not-allowed;opacity:.6}.input-error{border-color:var(--error)}.input-error:focus{box-shadow:0 0 0 3px #ef44441a}.input-error-message{font-size:.875rem;color:var(--error)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-weight:500;border-radius:var(--radius-md);transition:all var(--transition-base);border:none;cursor:pointer;font-family:var(--font-sans);text-decoration:none}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.btn-md{padding:.75rem 1.5rem;font-size:1rem}.btn-lg{padding:1rem 2rem;font-size:1.125rem}.btn-primary{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover:not(.btn-disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-primary:active:not(.btn-disabled){transform:translateY(0)}.btn-secondary{background:linear-gradient(135deg,var(--secondary) 0%,#7c3aed 100%);color:#fff;box-shadow:var(--shadow-md)}.btn-secondary:hover:not(.btn-disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-outline:hover:not(.btn-disabled){background:var(--primary);color:#fff}.btn-ghost{background:transparent;color:var(--text)}.btn-ghost:hover:not(.btn-disabled){background:var(--surface)}.btn-danger{background:var(--error);color:#fff}.btn-danger:hover:not(.btn-disabled){filter:brightness(1.1)}.btn-disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.normal-distribution{padding:3rem 0;min-height:100vh}.controls-card{margin-bottom:2rem}.controls-card h2,.chart-card h2{margin-bottom:1.5rem;font-size:1.5rem}.dimension-selector{margin-bottom:1.5rem}.control-label{display:block;font-weight:500;margin-bottom:.5rem}.dimension-buttons{display:flex;gap:.5rem}.sample-controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}.checkbox-wrapper{display:flex;align-items:center;gap:.5rem;padding-top:1.75rem}.checkbox-wrapper input[type=checkbox]{width:20px;height:20px;cursor:pointer}.checkbox-wrapper label{cursor:pointer;-webkit-user-select:none;user-select:none}.distributions-config{margin-top:2rem}.distributions-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.distributions-header h3{margin:0;font-size:1.25rem}.distribution-item{background:var(--surface);border-radius:var(--radius-md);padding:1rem;margin-bottom:1rem}.distribution-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}.distribution-color{width:24px;height:24px;border-radius:var(--radius-sm);flex-shrink:0}.distribution-name{font-weight:500;flex-grow:1}.distribution-inputs{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem}.chart-card{margin-bottom:2rem}.chart-wrapper{width:100%}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}.stats-card{background:var(--surface)}.stats-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}.stats-header h3{margin:0;font-size:1.125rem}.stats-list{display:flex;flex-direction:column;gap:.75rem}.stat-item{display:flex;justify-content:space-between;align-items:center;padding:.5rem 0;border-bottom:1px solid #e5e7eb}.stat-item:last-child{border-bottom:none}.stat-label{color:var(--text-secondary);font-size:.9375rem}.stat-value{font-weight:600;color:var(--text);font-family:var(--font-mono)}@media (max-width: 768px){.normal-distribution{padding:2rem 0}.page-header h1{font-size:2rem}.page-description{font-size:1rem}.sample-controls,.distribution-inputs,.stats-grid{grid-template-columns:1fr}.chart-wrapper{overflow-x:auto}}.elliptical-distribution{padding:3rem 0;min-height:100vh}.page-header{margin-bottom:2rem}.page-header h1{margin-bottom:.5rem}.page-description{color:var(--text-secondary);font-size:1.125rem;max-width:800px}.control-section{margin-bottom:2rem}.control-section h3{font-size:1.25rem;margin-bottom:1rem;color:var(--text)}.control-section h4{font-size:1.125rem;margin-top:1.5rem;margin-bottom:.75rem;color:var(--text-secondary)}.dimension-selector,.dist-type-selector{display:flex;flex-direction:column;gap:1rem}.select-input{padding:.75rem 1rem;border:2px solid #e5e7eb;border-radius:var(--radius-md);font-size:1rem;background-color:#fff;color:var(--text);cursor:pointer;transition:border-color var(--transition-base)}.select-input:hover{border-color:var(--primary-light)}.select-input:focus{outline:none;border-color:var(--primary)}.slider-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.slider-control{display:flex;flex-direction:column;gap:.5rem}.slider-control label{font-size:.9375rem;font-weight:500;color:var(--text)}.slider-control input[type=range]{width:100%;height:6px;border-radius:3px;background:linear-gradient(to right,#e5e7eb,#e5e7eb);outline:none;-webkit-appearance:none}.slider-control input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);cursor:pointer;box-shadow:0 2px 4px #0003;transition:transform var(--transition-fast)}.slider-control input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.1)}.slider-control input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);cursor:pointer;border:none;box-shadow:0 2px 4px #0003;transition:transform var(--transition-fast)}.slider-control input[type=range]::-moz-range-thumb:hover{transform:scale(1.1)}.checkbox-control{margin-top:1rem}.checkbox-control label{display:flex;align-items:center;gap:.5rem;font-size:.9375rem;color:var(--text);cursor:pointer}.checkbox-control input[type=checkbox]{width:18px;height:18px;cursor:pointer}.covariance-section{padding:1rem;background-color:var(--surface);border-radius:var(--radius-md)}.export-section{margin-top:2rem;padding-top:1.5rem;border-top:2px solid #e5e7eb}.chart-container{width:100%;margin-top:1.5rem}.chart-note{margin-top:1rem;font-size:.875rem;color:var(--text-secondary);font-style:italic}.stats-text{margin-top:.5rem;font-size:.875rem;color:var(--text-secondary);font-family:var(--font-mono)}.variable-selection{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem;padding:1rem;background-color:var(--surface);border-radius:var(--radius-md);flex-wrap:wrap}.variable-selection>label{font-weight:600;color:var(--text)}.checkbox-label{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background-color:#fff;border:2px solid #e5e7eb;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base)}.checkbox-label:hover{border-color:var(--primary-light);background-color:#f8fafc}.checkbox-label input[type=checkbox]{width:16px;height:16px;cursor:pointer}.density-curves-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:2rem;margin-top:1.5rem}.density-chart h3{font-size:1.125rem;margin-bottom:1rem;color:var(--text);text-align:center}.marginal-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:2rem;margin-top:1.5rem}.marginal-chart h3{font-size:1.125rem;margin-bottom:1rem;color:var(--text);text-align:center}@media (max-width: 768px){.elliptical-distribution{padding:2rem 0}.page-header h1{font-size:2rem}.page-description{font-size:1rem}.slider-grid,.density-curves-grid,.marginal-grid{grid-template-columns:1fr}.variable-selection{flex-direction:column;align-items:flex-start}.chart-container{overflow-x:auto}}@media (max-width: 1024px) and (min-width: 769px){.density-curves-grid{grid-template-columns:1fr}.marginal-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}}.cost-averaging{padding:2rem 0;min-height:100vh}.page-header{margin-bottom:1.5rem}.page-header h1{margin-bottom:.5rem;font-size:1.75rem}.page-description{color:var(--text-secondary);font-size:.9375rem;line-height:1.5}.calculator-compact{max-width:500px;margin:0 auto}.section-header{margin:1.5rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid var(--primary)}.section-header h3{margin:0;font-size:1rem;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.5px}.compact-row{display:flex;align-items:center;gap:1rem;margin-bottom:.75rem}.compact-label{flex:0 0 100px;font-size:.9375rem;font-weight:500;color:var(--text)}.label-hint{display:block;font-size:.75rem;color:var(--text-light);font-weight:400;margin-top:.125rem}.compact-input{width:140px;padding:.625rem .75rem;border:2px solid #e5e7eb;border-radius:var(--radius-md);font-size:1rem;font-family:var(--font-mono);font-weight:500;color:var(--text);background-color:#fff;transition:border-color var(--transition-base)}.compact-input:focus{outline:none;border-color:var(--primary)}.compact-input.with-currency{padding-left:2rem}.compact-input.centered{text-align:center}.compact-select{flex:1;padding:.625rem .75rem;border:2px solid #e5e7eb;border-radius:var(--radius-md);font-size:.9375rem;background-color:#fff;color:var(--text);cursor:pointer;transition:border-color var(--transition-base)}.compact-select:focus{outline:none;border-color:var(--primary)}.input-with-currency{position:relative;display:inline-block}.currency-symbol{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);font-size:.9375rem;font-weight:600;color:var(--text-secondary);pointer-events:none}.info-box{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border-radius:var(--radius-md);border-left:3px solid var(--info);margin:1rem 0}.info-label{font-size:.875rem;font-weight:500;color:var(--text-secondary)}.info-value{font-size:1rem;font-weight:700;color:var(--text);font-family:var(--font-mono)}.input-with-buttons{display:flex;align-items:center;gap:.5rem;flex:1}.adjust-btn{padding:.5rem!important;min-width:36px;flex-shrink:0}.error-display{text-align:center;padding:2rem 1rem;color:var(--error)}.error-display svg{margin-bottom:.75rem;opacity:.8}.error-display h3{margin:.5rem 0;font-size:1.125rem;color:var(--error)}.error-display p{margin:0;font-size:.9375rem;color:var(--text-secondary)}.results-compact{max-width:600px;margin:0 auto}.main-result-compact{display:flex;align-items:center;gap:1rem;padding:1.25rem;border-radius:var(--radius-lg);margin-bottom:1.5rem;position:relative}.main-result-compact.averaging-down{background:linear-gradient(135deg,#ecfdf5,#d1fae5);border-left:4px solid var(--success)}.main-result-compact.averaging-up{background:linear-gradient(135deg,#fef3c7,#fde68a);border-left:4px solid var(--warning)}.result-icon{flex-shrink:0}.averaging-down .result-icon{color:var(--success)}.averaging-up .result-icon{color:var(--warning)}.result-content{flex:1}.result-label{font-size:.8125rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary);margin-bottom:.25rem}.result-main{font-size:1.25rem;font-weight:400;color:var(--text);margin-bottom:.25rem}.result-main strong{font-weight:700;color:var(--text)}.result-detail{font-size:.875rem;color:var(--text-secondary)}.check-icon{color:var(--success);flex-shrink:0}.share-buttons{display:flex;gap:.75rem;justify-content:center;margin-bottom:1.5rem}.share-buttons button{flex:1;max-width:150px}.metrics-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;margin-bottom:1.5rem}.metric-card{padding:1rem;background-color:var(--surface);border-radius:var(--radius-md);border:1px solid #e5e7eb}.metric-label{font-size:.8125rem;color:var(--text-secondary);margin-bottom:.5rem;font-weight:500}.metric-value{font-size:1.125rem;font-weight:700;color:var(--text);font-family:var(--font-mono)}.metric-value.highlight{color:var(--primary)}.metric-value.positive{color:var(--success)}.metric-value.negative{color:var(--error)}.comparison-compact{padding:1rem;background-color:var(--surface);border-radius:var(--radius-md);border:1px solid #e5e7eb}.comparison-header{font-size:.875rem;font-weight:600;color:var(--text);margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:2px solid #e5e7eb}.comparison-row{display:grid;grid-template-columns:90px 1fr auto 1fr;align-items:center;gap:.5rem;padding:.5rem 0;font-size:.875rem}.comparison-row:not(:last-child){border-bottom:1px solid #f3f4f6}.comparison-label{font-weight:500;color:var(--text-secondary)}.comparison-before{font-family:var(--font-mono);color:var(--text-secondary);text-align:right}.comparison-arrow{color:var(--primary);font-weight:700;text-align:center}.comparison-after{font-family:var(--font-mono);color:var(--text);font-weight:600}.info-section{max-width:600px;margin:0 auto}.info-header{display:flex;align-items:center;gap:.5rem;margin-bottom:1rem;color:var(--primary)}.info-header h3{margin:0;font-size:1.125rem}.info-text{margin:0 0 .75rem;font-size:.9375rem;line-height:1.6;color:var(--text-secondary)}.info-tips{margin-top:1rem;padding:.75rem 1rem;background-color:var(--surface);border-radius:var(--radius-md);border-left:3px solid var(--primary)}.tip{font-size:.875rem;color:var(--text-secondary);line-height:1.6;padding:.25rem 0}@media (min-width: 768px){.cost-averaging{padding:3rem 0}.page-header h1{font-size:2.5rem}.page-description,.section-header h3{font-size:1.125rem}.calculator-compact{max-width:600px}.compact-input{width:160px}.results-compact{max-width:700px}.main-result-compact{padding:1.5rem}.result-main{font-size:1.5rem}.metrics-grid{grid-template-columns:repeat(4,1fr);gap:1rem}}@media (max-width: 767px){.cost-averaging{padding:1.5rem 0}.page-header{margin-bottom:1rem}.page-header h1{font-size:1.5rem}.page-description{font-size:.875rem}.compact-row{gap:.75rem}.compact-label{flex:0 0 85px;font-size:.875rem}.compact-input{width:120px;padding:.5rem .625rem;font-size:.9375rem}.compact-select{font-size:.875rem;padding:.5rem .625rem}.section-header{margin:1.25rem 0 .75rem}.section-header h3{font-size:.875rem}.info-box{padding:.625rem .75rem}.info-label{font-size:.8125rem}.info-value{font-size:.9375rem}.input-with-buttons{gap:.375rem}.adjust-btn{padding:.375rem!important;min-width:32px}.share-buttons{gap:.5rem}.share-buttons button{font-size:.875rem!important}.main-result-compact{padding:1rem;gap:.75rem}.result-icon svg{width:28px;height:28px}.result-label{font-size:.75rem}.result-main{font-size:1.125rem}.result-detail{font-size:.8125rem}.check-icon{width:20px;height:20px}.metrics-grid{grid-template-columns:1fr;gap:.625rem}.metric-card{padding:.75rem}.metric-label{font-size:.75rem}.metric-value{font-size:1rem}.comparison-compact{padding:.75rem}.comparison-header{font-size:.8125rem}.comparison-row{grid-template-columns:75px 1fr auto 1fr;font-size:.8125rem;gap:.375rem}.info-header h3{font-size:1rem}.info-text{font-size:.875rem}.tip{font-size:.8125rem}}@media (max-width: 374px){.compact-label{flex:0 0 70px;font-size:.8125rem}.compact-input{width:100px;font-size:.875rem}.comparison-row{grid-template-columns:65px 1fr auto 1fr;font-size:.75rem}}.home{min-height:100vh;display:flex;flex-direction:column}.hero{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:6rem 0 4rem;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");opacity:.4}.hero-content{position:relative;z-index:1;text-align:center;max-width:800px;margin:0 auto}.hero-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#fff3;border-radius:var(--radius-full);font-size:.875rem;font-weight:500;margin-bottom:2rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.hero-title{font-size:3.5rem;font-weight:700;margin-bottom:1.5rem;line-height:1.1}.hero-gradient{background:linear-gradient(135deg,#fff,#e0e7ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-description{font-size:1.25rem;line-height:1.6;opacity:.95;max-width:600px;margin:0 auto}.tools-section{padding:4rem 0;flex-grow:1}.tools-controls{margin-bottom:3rem;display:flex;flex-direction:column;gap:1.5rem}.search-wrapper{position:relative;max-width:600px;margin:0 auto;width:100%}.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--text-light);pointer-events:none}.search-input{width:100%;padding:1rem 1rem 1rem 3rem;font-size:1rem;border:2px solid #e5e7eb;border-radius:var(--radius-lg);background:#fff;transition:all var(--transition-base)}.search-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #6366f11a}.category-filters{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}.category-btn{padding:.5rem 1.25rem;border:2px solid #e5e7eb;border-radius:var(--radius-full);background:#fff;color:var(--text);font-weight:500;font-size:.9375rem;transition:all var(--transition-base);text-transform:capitalize}.category-btn:hover{border-color:var(--primary);color:var(--primary)}.category-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:2rem;animation:fadeIn .5s ease-out}.no-results{text-align:center;padding:4rem 2rem;color:var(--text-secondary)}.footer{background:var(--surface);padding:2rem 0;margin-top:4rem}.footer-text{text-align:center;color:var(--text-secondary);margin:0}@media (max-width: 768px){.hero{padding:4rem 0 3rem}.hero-title{font-size:2.5rem}.hero-description{font-size:1.125rem}.tools-section{padding:3rem 0}.tools-grid{grid-template-columns:1fr;gap:1.5rem}.category-filters{gap:.5rem}.category-btn{padding:.5rem 1rem;font-size:.875rem}}@media (max-width: 480px){.hero-title{font-size:2rem}.hero-description{font-size:1rem}}*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--secondary: #8b5cf6;--accent: #ec4899;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--info: #3b82f6;--background: #ffffff;--surface: #f8fafc;--text: #1f2937;--text-secondary: #6b7280;--text-light: #9ca3af;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Monaco, Consolas, monospace;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-base: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--transition-fast: .15s;--transition-base: .2s;--transition-slow: .3s}body{font-family:var(--font-sans);color:var(--text);background-color:var(--background);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;color:var(--text)}h1{font-size:3rem}h2{font-size:2.25rem}h3{font-size:1.875rem}h4{font-size:1.5rem}h5{font-size:1.25rem}h6{font-size:1.125rem}p{margin-bottom:1rem}a{color:var(--primary);text-decoration:none;transition:color var(--transition-base)}a:hover{color:var(--primary-dark)}button{font-family:var(--font-sans);cursor:pointer;border:none;background:none;transition:all var(--transition-base)}input,textarea,select{font-family:var(--font-sans);font-size:1rem}.container{width:100%;max-width:1280px;margin:0 auto;padding:0 var(--spacing-md)}.text-center{text-align:center}.text-primary{color:var(--primary)}.text-secondary{color:var(--text-secondary)}.bg-primary{background-color:var(--primary)}.bg-surface{background-color:var(--surface)}@media (max-width: 768px){h1{font-size:2.25rem}h2{font-size:1.875rem}h3{font-size:1.5rem}h4{font-size:1.25rem}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn var(--transition-slow) ease-out}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--surface)}::-webkit-scrollbar-thumb{background:var(--text-light);border-radius:var(--radius-md)}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}