.sphere-calc-wrapper[data-astro-cid-vwbsri35]{width:100%;margin-inline:auto;min-width:0}.sphere-calc[data-astro-cid-vwbsri35]{display:grid;grid-template-columns:264px minmax(0,1fr) minmax(0,1.15fr);grid-template-areas:"picker inputs stage" "picker details stage";gap:0;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 4px 20px #0f1b2d14;overflow:hidden;max-width:100%;min-width:0}.sphere-calc[data-astro-cid-vwbsri35] fieldset[data-astro-cid-vwbsri35]{min-width:0;max-width:100%}.sphere-calc[data-astro-cid-vwbsri35] .calc-picker[data-astro-cid-vwbsri35]{grid-area:picker;border:none;margin:0;padding:20px 16px;background:#fafbfa;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:16px;min-width:0;max-width:100%}.picker-legend[data-astro-cid-vwbsri35]{font-size:13px;font-weight:700;color:var(--muted);margin-bottom:12px}.shape-cards[data-astro-cid-vwbsri35]{display:flex;flex-direction:column;gap:8px}.shape-card[data-astro-cid-vwbsri35]{position:relative;display:block;cursor:pointer}.shape-card[data-astro-cid-vwbsri35] input[data-astro-cid-vwbsri35]{position:absolute;opacity:0;pointer-events:none}.shape-card-inner[data-astro-cid-vwbsri35]{display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--bg);border:1.5px solid var(--line);border-radius:10px;transition:all .15s ease}.shape-card[data-astro-cid-vwbsri35]:hover .shape-card-inner[data-astro-cid-vwbsri35]{border-color:var(--brass-lt)}.shape-card[data-astro-cid-vwbsri35] input[data-astro-cid-vwbsri35]:focus-visible~.shape-card-inner[data-astro-cid-vwbsri35]{outline:2px solid var(--brass);outline-offset:2px}.shape-card[data-astro-cid-vwbsri35] input[data-astro-cid-vwbsri35]:checked~.shape-card-inner[data-astro-cid-vwbsri35]{background:var(--surface);border-color:var(--brass);box-shadow:0 2px 8px #b8894a1f}.shape-icon[data-astro-cid-vwbsri35]{width:32px;height:32px;flex-shrink:0;color:var(--ink-2)}.shape-card[data-astro-cid-vwbsri35] input[data-astro-cid-vwbsri35]:checked~.shape-card-inner[data-astro-cid-vwbsri35] .shape-icon[data-astro-cid-vwbsri35]{color:var(--brass)}.shape-info[data-astro-cid-vwbsri35]{display:flex;flex-direction:column;min-width:0}.shape-title[data-astro-cid-vwbsri35]{font-size:14px;font-weight:600;color:var(--ink);line-height:1.25}.shape-hint[data-astro-cid-vwbsri35]{font-size:11.5px;color:var(--muted);line-height:1.2;margin-top:2px}.sphere-calc[data-astro-cid-vwbsri35] .calc-inputs[data-astro-cid-vwbsri35]{grid-area:inputs;border:none;margin:0;padding:24px 20px 20px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:16px;min-width:0;max-width:100%}.sphere-calc[data-astro-cid-vwbsri35] .mode-fields[data-astro-cid-vwbsri35],.sphere-calc[data-astro-cid-vwbsri35] #wrap-mass-find-mass[data-astro-cid-vwbsri35],.sphere-calc[data-astro-cid-vwbsri35] #wrap-mass-find-size[data-astro-cid-vwbsri35],.inputs-grid[data-astro-cid-vwbsri35]{display:flex;flex-direction:column;gap:14px;width:100%;min-width:0}.field[data-astro-cid-vwbsri35]{display:flex;flex-direction:column;gap:6px;width:100%;min-width:0}.field[data-astro-cid-vwbsri35] label[data-astro-cid-vwbsri35]{font-size:13.5px;font-weight:600;color:var(--ink-2)}.pair[data-astro-cid-vwbsri35]{display:flex;gap:8px}.pair[data-astro-cid-vwbsri35] input[data-astro-cid-vwbsri35],.select-full[data-astro-cid-vwbsri35]{flex:1;min-width:0;height:42px;padding:0 12px;border:1px solid var(--line);border-radius:8px;font-family:inherit;font-size:15px;color:var(--ink);background:var(--surface);box-sizing:border-box}.pair[data-astro-cid-vwbsri35] select[data-astro-cid-vwbsri35]{width:140px;flex-shrink:0;height:42px;padding:0 8px;border:1px solid var(--line);border-radius:8px;font-family:inherit;font-size:14px;color:var(--ink);background:var(--bg);box-sizing:border-box}.pair[data-astro-cid-vwbsri35] input[data-astro-cid-vwbsri35]:focus,.pair[data-astro-cid-vwbsri35] select[data-astro-cid-vwbsri35]:focus,.select-full[data-astro-cid-vwbsri35]:focus{outline:none;border-color:var(--brass);box-shadow:0 0 0 3px #b8894a26}.field-hint-text[data-astro-cid-vwbsri35]{font-size:12.5px;color:var(--muted);margin:4px 0 0;line-height:1.4}.sub-toggle-row[data-astro-cid-vwbsri35]{margin-bottom:8px}.seg-control[data-astro-cid-vwbsri35]{display:flex;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:3px;gap:4px}.seg-btn[data-astro-cid-vwbsri35]{flex:1;text-align:center;padding:6px 10px;border-radius:6px;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer;transition:all .12s ease}.seg-btn[data-astro-cid-vwbsri35] input[data-astro-cid-vwbsri35]{position:absolute;opacity:0;pointer-events:none}.seg-btn[data-astro-cid-vwbsri35].is-active{background:var(--surface);color:var(--ink);box-shadow:0 1px 4px #0f1b2d14}.btn-cap-action[data-astro-cid-vwbsri35]{display:inline-flex;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:6px 12px;font-size:12.5px;font-weight:600;color:var(--brass-dk);cursor:pointer;margin-top:4px}.btn-cap-action[data-astro-cid-vwbsri35]:hover{background:var(--surface);border-color:var(--brass)}.calc-error-banner[data-astro-cid-vwbsri35]{background:#fff0f0;border:1px solid #FFC9C9;border-radius:8px;padding:10px 14px;color:#c02020;font-size:13px;font-weight:600;margin-top:6px}.sphere-calc[data-astro-cid-vwbsri35] .calc-details[data-astro-cid-vwbsri35]{grid-area:details;padding:16px 20px 24px;background:#fafbfa;border-right:1px solid var(--line);border-top:1px solid var(--line);min-width:0;max-width:100%}.sphere-calc[data-astro-cid-vwbsri35] .details-title[data-astro-cid-vwbsri35]{display:block;font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:10px}.sphere-calc[data-astro-cid-vwbsri35] .details-grid[data-astro-cid-vwbsri35]{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;min-width:0;max-width:100%}.sphere-calc[data-astro-cid-vwbsri35] .detail-cell[data-astro-cid-vwbsri35],.sphere-calc[data-astro-cid-vwbsri35] .detail-cell{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 10px;text-align:left;display:flex;flex-direction:column;gap:2px;cursor:pointer;transition:all .15s ease;font-family:inherit;min-width:0}.sphere-calc[data-astro-cid-vwbsri35] .detail-cell[data-astro-cid-vwbsri35]:hover:not(.static-cell),.sphere-calc[data-astro-cid-vwbsri35] .detail-cell:hover:not(.static-cell){border-color:var(--brass);background:#fdfbf7}.sphere-calc[data-astro-cid-vwbsri35] .detail-cell[data-astro-cid-vwbsri35].static-cell,.sphere-calc[data-astro-cid-vwbsri35] .detail-cell.static-cell{cursor:default;background:#f4f5f2}.sphere-calc[data-astro-cid-vwbsri35] .detail-cell[data-astro-cid-vwbsri35]:focus-visible,.sphere-calc[data-astro-cid-vwbsri35] .detail-cell:focus-visible{outline:2px solid var(--brass);outline-offset:1px}.sphere-calc[data-astro-cid-vwbsri35] .detail-label[data-astro-cid-vwbsri35],.sphere-calc[data-astro-cid-vwbsri35] .detail-label{display:block;font-size:11px;color:var(--muted);font-weight:500;line-height:1.25;white-space:normal;word-break:break-word}.sphere-calc[data-astro-cid-vwbsri35] .detail-val[data-astro-cid-vwbsri35],.sphere-calc[data-astro-cid-vwbsri35] .detail-val{display:block;font-size:13.5px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.3}.sphere-calc[data-astro-cid-vwbsri35] .calc-stage[data-astro-cid-vwbsri35]{grid-area:stage;background:var(--navy);color:#fff;padding:24px 24px 20px;display:flex;flex-direction:column;gap:16px;position:relative;border-left:1px solid rgba(255,255,255,.08);min-width:0;max-width:100%}.stage-result-block[data-astro-cid-vwbsri35]{display:flex;flex-direction:column;gap:8px;border-bottom:1px solid rgba(218,222,226,.15);padding-bottom:14px}.stage-result-top[data-astro-cid-vwbsri35]{display:flex;justify-content:space-between;align-items:center}.stage-result-label[data-astro-cid-vwbsri35]{font-size:12px;font-weight:700;color:var(--brass-lt);letter-spacing:.04em}.btn-copy[data-astro-cid-vwbsri35]{display:inline-flex;align-items:center;gap:5px;background:#ffffff14;border:1px solid rgba(255,255,255,.15);border-radius:6px;padding:3px 8px;font-size:12px;color:#fff;cursor:pointer;transition:background .15s ease}.btn-copy[data-astro-cid-vwbsri35]:hover{background:#ffffff2e}.ico-copy[data-astro-cid-vwbsri35]{width:13px;height:13px}.stage-big-number-row[data-astro-cid-vwbsri35]{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.big-number[data-astro-cid-vwbsri35]{font-family:var(--font-serif, "Source Serif 4 Variable", Georgia, serif);font-size:34px;font-weight:700;color:#fff;line-height:1;word-break:break-all}.select-result-unit[data-astro-cid-vwbsri35]{height:32px;background:#ffffff1a;color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:6px;font-size:13px;padding:0 8px}.select-result-unit[data-astro-cid-vwbsri35] option[data-astro-cid-vwbsri35]{background:var(--navy);color:#fff}.stage-holds-row[data-astro-cid-vwbsri35]{font-size:13px;color:var(--brass-lt);display:flex;gap:6px}.holds-label[data-astro-cid-vwbsri35]{color:#fff9}.stage-worked-line[data-astro-cid-vwbsri35]{font-size:12px;color:#ffffffb3;font-family:monospace;background:#0003;padding:6px 8px;border-radius:6px;word-break:break-all}.stage-drawing-wrap[data-astro-cid-vwbsri35]{width:100%;display:flex;justify-content:center;background:#00000026;border-radius:10px;padding:10px;box-sizing:border-box}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35]{width:100%;height:auto;max-height:220px;--edge: #FFFFFF;--hid: rgba(255, 255, 255, .35);--f1: rgba(184, 137, 74, .35);--f2: rgba(184, 137, 74, .65);--f3: rgba(255, 255, 255, .08);--ax: rgba(221, 188, 136, .8)}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .e[data-astro-cid-vwbsri35]{stroke:var(--edge);stroke-width:1.5;fill:none}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .h[data-astro-cid-vwbsri35]{stroke:var(--hid);stroke-width:1.2;stroke-dasharray:4,4;fill:none}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .ax[data-astro-cid-vwbsri35]{stroke:var(--ax);stroke-width:1.2;stroke-dasharray:2,4;fill:none}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .f1[data-astro-cid-vwbsri35]{fill:var(--f1)}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .f2[data-astro-cid-vwbsri35]{fill:var(--f2)}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .f3[data-astro-cid-vwbsri35]{fill:var(--f3)}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .d[data-astro-cid-vwbsri35]{stroke:var(--brass-lt);stroke-width:1.5;fill:none}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .x[data-astro-cid-vwbsri35]{stroke:#ffffff4d;stroke-width:1;stroke-dasharray:2,2}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .pill[data-astro-cid-vwbsri35] rect[data-astro-cid-vwbsri35]{fill:#0f1b2de6;stroke:var(--brass-lt);stroke-width:1}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .pill[data-astro-cid-vwbsri35] text[data-astro-cid-vwbsri35]{fill:#fff;font-weight:600}.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .dim[data-astro-cid-vwbsri35]:hover .pill[data-astro-cid-vwbsri35] rect[data-astro-cid-vwbsri35],.stage-drawing-wrap[data-astro-cid-vwbsri35] svg[data-astro-cid-vwbsri35] .dim[data-astro-cid-vwbsri35]:focus-visible .pill[data-astro-cid-vwbsri35] rect[data-astro-cid-vwbsri35]{fill:var(--brass-dk);stroke:#fff}.stage-caption[data-astro-cid-vwbsri35]{font-size:12.5px;color:#ffffffb3;text-align:center;line-height:1.35}@media(min-width:760px)and (max-width:1099px){.sphere-calc[data-astro-cid-vwbsri35]{grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);grid-template-areas:"picker picker" "inputs stage" "details stage"}.sphere-calc[data-astro-cid-vwbsri35] .calc-picker[data-astro-cid-vwbsri35]{border-right:none;border-bottom:1px solid var(--line);padding:10px 18px;display:flex;flex-direction:row;justify-content:space-between;align-items:center;gap:16px}.sphere-calc[data-astro-cid-vwbsri35] .picker-legend[data-astro-cid-vwbsri35]{display:none}.sphere-calc[data-astro-cid-vwbsri35] .shape-cards[data-astro-cid-vwbsri35]{display:flex;flex-direction:row;flex-wrap:nowrap;overflow-x:auto;scroll-snap-type:x proximity;scrollbar-width:thin;padding-bottom:0;gap:8px}.sphere-calc[data-astro-cid-vwbsri35] .shape-card[data-astro-cid-vwbsri35]{flex:0 0 auto;min-width:auto}.sphere-calc[data-astro-cid-vwbsri35] .shape-card-inner[data-astro-cid-vwbsri35]{padding:6px 12px;font-size:13px;white-space:nowrap}}@media(max-width:759px){.sphere-calc[data-astro-cid-vwbsri35]{grid-template-columns:minmax(0,1fr);grid-template-areas:"picker" "inputs" "stage" "details";border-radius:12px;max-width:100%;overflow:hidden}.sphere-calc[data-astro-cid-vwbsri35] fieldset[data-astro-cid-vwbsri35]{min-width:0;max-width:100%}.sphere-calc[data-astro-cid-vwbsri35] .calc-picker[data-astro-cid-vwbsri35]{border-right:none;border-bottom:1px solid var(--line);padding:8px 12px;min-width:0;max-width:100%;overflow:hidden;gap:6px}.sphere-calc[data-astro-cid-vwbsri35] .picker-legend[data-astro-cid-vwbsri35]{display:none}.sphere-calc[data-astro-cid-vwbsri35] .shape-cards[data-astro-cid-vwbsri35]{display:flex;flex-direction:row;overflow-x:auto;gap:6px;padding-bottom:4px}.sphere-calc[data-astro-cid-vwbsri35] .shape-card[data-astro-cid-vwbsri35]{flex:0 0 auto}.sphere-calc[data-astro-cid-vwbsri35] .shape-card-inner[data-astro-cid-vwbsri35]{padding:6px 10px;font-size:12px}.sphere-calc[data-astro-cid-vwbsri35] .calc-inputs[data-astro-cid-vwbsri35]{border-right:none;border-bottom:1px solid var(--line);padding:16px}.sphere-calc[data-astro-cid-vwbsri35] .calc-stage[data-astro-cid-vwbsri35]{padding:16px;border-left:none;border-bottom:1px solid rgba(255,255,255,.08)}.sphere-calc[data-astro-cid-vwbsri35] .calc-details[data-astro-cid-vwbsri35]{border-right:none;border-top:1px solid var(--line);padding:16px}.sphere-calc[data-astro-cid-vwbsri35] .details-grid[data-astro-cid-vwbsri35]{grid-template-columns:1fr}.sphere-calc[data-astro-cid-vwbsri35] .big-number[data-astro-cid-vwbsri35]{font-size:28px}.sphere-calc[data-astro-cid-vwbsri35] .pair[data-astro-cid-vwbsri35] select[data-astro-cid-vwbsri35]{width:115px}}.sphere-page[data-astro-cid-ap556yej]{width:100%;min-height:100vh;background:var(--bg);color:var(--ink)}.breadcrumbs-wrap[data-astro-cid-ap556yej]{padding-top:4px;padding-bottom:2px;max-width:1100px;margin:0 auto;padding-inline:24px}.breadcrumbs-list[data-astro-cid-ap556yej]{display:flex;align-items:center;gap:8px;list-style:none;margin:0;padding:0;font-size:13.5px;color:var(--muted)}.crumb-item[data-astro-cid-ap556yej] a[data-astro-cid-ap556yej]{color:var(--muted);text-decoration:none;transition:color .12s ease}.crumb-item[data-astro-cid-ap556yej] a[data-astro-cid-ap556yej]:hover{color:var(--brass-dk);text-decoration:underline}.crumb-separator[data-astro-cid-ap556yej]{color:var(--line-2)}.hero-header[data-astro-cid-ap556yej]{max-width:1100px;margin:0 auto 6px;padding-inline:24px}.hero-title[data-astro-cid-ap556yej]{font-family:var(--font-serif, "Source Serif 4 Variable", Georgia, serif);font-size:34px;font-weight:700;line-height:1.15;color:var(--ink);margin:0 0 6px;letter-spacing:-.02em}.hero-lede[data-astro-cid-ap556yej]{font-size:16.5px;line-height:1.4;color:var(--ink-2);margin:0;max-width:820px}.calc-container-wrap[data-astro-cid-ap556yej]{max-width:1100px;margin:0 auto;padding-inline:24px}.sphere-content-flow[data-astro-cid-ap556yej]{padding-bottom:64px;width:100%;box-sizing:border-box}.sphere-content-flow[data-astro-cid-ap556yej] .wrap[data-astro-cid-ap556yej]{max-width:100%;padding-inline:0}.section-wrap[data-astro-cid-ap556yej]{margin-top:48px;max-width:100%;padding-inline:0}.intro-section[data-astro-cid-ap556yej]{margin-top:24px}.content-intro-lede[data-astro-cid-ap556yej]{font-size:19px;line-height:1.55;color:var(--ink-2);margin:0 0 20px}.prose[data-astro-cid-ap556yej]{max-width:760px;width:100%;margin-inline:auto;color:var(--ink-2);font-size:16.5px;line-height:1.6}.prose[data-astro-cid-ap556yej] p[data-astro-cid-ap556yej],.prose[data-astro-cid-ap556yej] ul[data-astro-cid-ap556yej],.prose[data-astro-cid-ap556yej] ol[data-astro-cid-ap556yej],.prose[data-astro-cid-ap556yej] li[data-astro-cid-ap556yej]{max-width:100%;width:100%}.prose[data-astro-cid-ap556yej] h2[data-astro-cid-ap556yej]{font-family:var(--font-serif, "Source Serif 4 Variable", 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