.content-wrapper{max-width:1400px;margin:0 auto;padding:20px}body{margin:0;padding:0;min-height:100vh;padding-top:var(--header-height);display:flex;flex-direction:column;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--background-color);color:var(--text-color)}.main-container{flex:1;width:100%;padding:1.5rem;display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:.5rem;min-height:calc(100vh - var(--header-height) - var(--footer-height));box-sizing:border-box}.params-container{background:#fff;padding:2rem;border-radius:var(--border-radius);box-shadow:var(--shadow);max-height:calc(100vh - var(--header-height) - var(--footer-height) - 3rem);overflow-y:auto}.params-container::-webkit-scrollbar{width:6px}.params-container::-webkit-scrollbar-track{background:#f1f1f1;border-radius:3px}.params-container::-webkit-scrollbar-thumb{background:#ccc;border-radius:3px}.params-container::-webkit-scrollbar-thumb:hover{background:#bbb}.section-header{color:var(--text-color);margin-bottom:1.5rem;font-size:1.3rem}h2{color:var(--text-color);font-size:1.1rem;margin:1.5rem 0 1rem;font-weight:600;opacity:.8}.centered{text-align:center}.distribution-select-container{margin-bottom:1.5rem;display:flex;justify-content:left}select{width:auto;min-width:200px;max-width:300px;padding:.7rem 2.5rem .7rem 1rem;border:1px solid #ddd;border-radius:var(--border-radius);background-color:#fff;font-size:.9rem;cursor:pointer;transition:all .3s ease;appearance:none;background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right .7rem center;background-size:1em}select:hover{border-color:var(--primary-color);transform:translateY(-1px);box-shadow:0 4px 8px #0000001a}select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #2196f333}.param-inputs{display:flex;flex-direction:column;gap:1rem;margin-top:1rem;align-items:left}.parameter-group{margin-bottom:1rem;width:60%}.parameter-group label{display:block;margin-bottom:.5rem;font-size:.95rem;color:var(--text-color)}.slider-container{display:flex;align-items:center;gap:.8rem;width:100%}input[type=range]{flex:1;height:4px;background:#e0e0e0;border-radius:2px;appearance:none;cursor:pointer}input[type=range]::-webkit-slider-thumb{appearance:none;width:16px;height:16px;background:var(--primary-color);border-radius:50%;cursor:pointer;transition:background .3s;border:2px solid white;box-shadow:0 1px 3px #0003}input[type=range]::-webkit-slider-thumb:hover{background:var(--primary-color-dark)}input[type=range]::-moz-range-thumb{width:16px;height:16px;background:var(--primary-color);border-radius:50%;cursor:pointer;transition:background .3s;border:2px solid white;box-shadow:0 1px 3px #0003}input[type=range]::-moz-range-thumb:hover{background:var(--primary-color-dark)}.value-display{min-width:45px;padding:4px 8px;background:#f5f5f5;border-radius:4px;text-align:center;font-size:.9em;color:#666;margin-left:auto}.canvas-container{background:#fff;padding:1.5rem;border-radius:var(--border-radius);box-shadow:var(--shadow);height:calc(100vh - var(--header-height) - var(--footer-height) - 3rem);display:flex;flex-direction:column;align-items:stretch;overflow-y:auto}#plot-container{flex:1;width:100%;background-color:#fff;border-radius:8px}h3{color:var(--primary-color);font-size:1.1rem;margin:0 0 .8rem;font-weight:600;padding-bottom:.4rem;border-bottom:2px solid var(--primary-color)}h4{color:var(--text-color);font-size:1rem;margin:1.2rem 0 .5rem;font-weight:600}.formula-section{margin:1.5rem 0;padding:.8rem;background-color:#f8f9fa;border-radius:var(--border-radius);box-shadow:var(--shadow);overflow:hidden}.formula-section h3{margin-top:0;margin-bottom:.8rem;border-bottom-color:#2196f34d}.formula{position:relative;width:100%;box-sizing:border-box;overflow-x:auto;padding:.8rem;background-color:#fff;border-radius:var(--border-radius);font-size:1rem;box-shadow:inset 0 1px 3px #0000001a;margin:0;-webkit-overflow-scrolling:touch;white-space:nowrap}.distribution-info{margin-top:1.5rem}.features-container{padding:1.2rem;background-color:#fff;border-radius:var(--border-radius);box-shadow:var(--shadow)}#distribution-description{color:var(--text-color);line-height:1.5;font-size:.9rem}#distribution-description p{margin:.8rem 0;font-size:.9rem}.reference{margin-top:1.2rem;padding-top:1rem;border-top:1px solid var(--border-color)}.reference a{color:var(--primary-color);text-decoration:none;font-size:.9em;display:inline-flex;align-items:center;transition:color .3s}.reference a:hover{color:var(--primary-color-dark);text-decoration:underline}.expectation{display:flex;align-items:center;gap:2rem;width:100%;position:relative}#expectation-formula{flex:1;max-width:50%}#expectation-value{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center;gap:.5rem}.expectation:after{content:"\2192";position:absolute;left:50%;transform:translate(-50%);color:#2196f3;font-size:1.5rem;font-weight:700}#expectation-value div:first-child{color:#666;font-size:.9rem;margin-bottom:.5rem}#expectation-value div:last-child{color:var(--text-color);font-size:1.1rem;font-weight:700;text-align:center}@media (max-width: 1024px){.main-container{grid-template-columns:1fr;gap:1rem}.params-container,.canvas-container{max-height:none;height:auto}#plot-container{height:500px}}@media (max-width: 768px){.main-container,.params-container,.canvas-container{padding:1rem}#plot-container{height:400px}.section-header{font-size:1.2rem}select{min-width:150px}}.feature-item{margin-bottom:1rem;line-height:1.6}.feature-label{font-weight:600;color:var(--primary-color);margin-right:.5rem}.distribution-name{color:var(--primary-color);margin:0 0 1rem;font-size:1.2rem;font-weight:600}.features-content{margin:1rem 0}.link-container{margin-top:1.5rem;text-align:center}.statistics-school-link{display:inline-flex;align-items:center;justify-content:center;padding:.8rem 1.5rem;background:linear-gradient(135deg,#2196f3,#1976d2);color:#fff;text-decoration:none;border-radius:var(--border-radius);transition:all .3s ease;font-weight:500;box-shadow:0 2px 4px #2196f34d}.statistics-school-link:hover{background-color:var(--primary-color-dark);transform:translateY(-2px);box-shadow:0 4px 8px #0003}.link-text{font-size:.9rem}.disclaimer{font-size:.85rem;color:#666;margin:-.5rem 0 1rem;line-height:1.4;padding-left:1rem;border-left:3px solid var(--border-color);font-style:italic}.parameter-descriptions{margin-bottom:2rem;padding:1rem;background:#f8f9fa;border-radius:8px;border-left:4px solid var(--primary-color)}.parameter-description{margin-bottom:1rem;line-height:1.5;font-size:.95rem;display:grid;grid-template-columns:auto 1fr;gap:.8rem;align-items:baseline}.parameter-description .math{color:var(--primary-color);padding-right:.5rem;border-right:2px solid #e0e0e0;min-width:120px;font-family:inherit;font-weight:500}.parameter-description .description{color:#555}.parameter-description:last-child{margin-bottom:0}.parameter-tooltip,.parameter-label,.parameter-name{display:none}