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.calc-section-content{grid-template-rows:1fr}.calc-section-inner{overflow:hidden;opacity:0;transition:opacity .3s ease}.calc-section.is-open .calc-section-inner{opacity:1;padding-bottom:2rem}.calc-section.is-closed .calc-section-summary{display:block}.calc-section.is-open .calc-section-summary{display:none}.article-accordion{margin:2rem 0;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-secondary)}.article-accordion .calc-section-header{flex-direction:column;align-items:center;text-align:center;padding:2rem 1.5rem;gap:.75rem}.article-accordion .calc-section-header:hover{padding-left:1.5rem}.article-accordion .calc-section-header h3{font-size:1.5rem;letter-spacing:.2em}.article-accordion .calc-section-summary{text-align:center;max-width:600px;font-size:1.25rem}.article-accordion .calc-section-chevron{margin-top:.5rem}.article-accordion .calc-section-inner{padding:0 1.5rem}.article-accordion.is-open .calc-section-inner{padding-bottom:1.5rem}.article-accordion h4{font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:.95rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;margin:2rem 0 1rem;color:var(--text-primary)}.article-accordion h4:first-child{margin-top:0}.article-accordion p{margin:1rem 0}.article-accordion p:first-child{margin-top:0}.calc-grid{display:grid;gap:1.25rem}.calc-grid.two-col{grid-template-columns:repeat(2,1fr);gap:1.25rem 2.5rem}.calc-grid label{display:flex;flex-direction:column;gap:.3rem}.calc-grid label.full-width{grid-column:1 / -1}.calc-label{font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:1rem;color:var(--text-secondary)}.calc-unit{font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:.85rem;color:var(--text-muted);font-style:italic}.calc-grid input,.calc-grid select{font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:1.05rem;padding:.7rem 1rem;border:2px solid var(--border-color);border-radius:8px;background:#ffffff80;color:var(--text-primary);transition:all .3s ease;width:100%;max-width:200px;-moz-appearance:textfield}[data-theme=dark] .calc-grid input,[data-theme=dark] .calc-grid select{background:var(--twilight-water)}.calc-grid input::-webkit-outer-spin-button,.calc-grid input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.calc-grid select{max-width:100%;cursor:pointer}.calc-grid input:focus,.calc-grid select:focus{outline:none;border-color:var(--dawn-copper);box-shadow:0 0 0 4px var(--glow-gold)}.calc-derived{margin-top:1.25rem;padding:0}.calc-derived+.calc-derived{margin-top:.75rem}.derived-row{display:flex;justify-content:space-between;align-items:center;padding:.6rem 0;font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:1rem;color:var(--text-muted);border-bottom:1px solid var(--border-light)}.derived-row:last-child{border-bottom:none}.derived-row span:first-child{flex:1;padding-right:1rem}.derived-row span:last-child{font-weight:600;color:var(--text-primary);text-align:right;white-space:nowrap}.derived-row.highlight{font-weight:500}.derived-row.highlight span:first-child{color:var(--text-primary)}.derived-row.highlight span:last-child{font-size:1.1rem;color:var(--accent)}.calc-slider-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.75rem 3rem}.slider-label{display:flex;flex-direction:column;gap:.75rem}.slider-label .calc-label{display:flex;justify-content:space-between;align-items:baseline;font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:1rem;color:var(--text-secondary)}.slider-value{font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:1rem;font-weight:500;font-style:italic;color:var(--text-primary);background:none;padding:0;min-width:auto;text-align:right}.slider-label input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:2px;background:var(--border-color);border-radius:1px;outline:none;cursor:pointer;transition:background .2s ease;margin:8px 0}.slider-label input[type=range]:hover{background:var(--dawn-copper)}.slider-label input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:12px;height:12px;background:var(--text-primary);border:2px solid var(--parchment);border-radius:50%;cursor:pointer;transition:all .2s ease}.slider-label input[type=range]::-webkit-slider-thumb:hover{background:var(--dawn-copper);transform:scale(1.2)}.slider-label input[type=range]::-webkit-slider-thumb:active{background:var(--dawn-copper)}.slider-label input[type=range]::-moz-range-thumb{width:12px;height:12px;background:var(--text-primary);border:2px solid var(--parchment);border-radius:50%;cursor:pointer;transition:all .2s ease}.slider-label input[type=range]::-moz-range-thumb:hover{background:var(--dawn-copper);transform:scale(1.2)}.slider-label input[type=range]::-moz-range-track{background:var(--border-color);border-radius:1px;height:2px}.slider-label input[type=range]:focus::-webkit-slider-thumb{background:var(--dawn-copper);box-shadow:0 0 0 3px #a85d3b33}.slider-label input[type=range]:focus::-moz-range-thumb{background:var(--dawn-copper);box-shadow:0 0 0 3px #a85d3b33}[data-theme=dark] .slider-label input[type=range]{background:var(--border-light)}[data-theme=dark] .slider-label input[type=range]::-webkit-slider-thumb{background:var(--dawn-gold);border-color:var(--deep-ocean)}[data-theme=dark] .slider-label input[type=range]::-moz-range-thumb{background:var(--dawn-gold);border-color:var(--deep-ocean)}@media(max-width:700px){.calc-slider-grid{grid-template-columns:1fr;gap:1.5rem}}.calc-key-metrics{display:flex;justify-content:space-around;gap:2rem;margin-bottom:3rem;padding:2.5rem;background:transparent;border-radius:12px;border:1px solid var(--border-color)}.key-metric{text-align:center}.key-metric-value{font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:2.5rem;font-weight:500;color:var(--text-primary);display:block;line-height:1.2}.key-metric-unit{font-size:1.1rem;font-weight:400;color:var(--text-muted)}.key-metric-label{font-family:EB Garamond,Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;font-size:.8rem;letter-spacing:.15em;text-transform:uppercase;color:var(--text-muted);margin-top:.6rem;display:block}@media(max-width:700px){.calc-grid.two-col{grid-template-columns:1fr}.calc-section h3{font-size:.9rem}.calc-grid input,.calc-grid select{max-width:100%}.calc-key-metrics{flex-direction:column;gap:1.5rem;padding:1.5rem}.key-metric-value{font-size:2rem}}