:root{--accent:var(--calc-color-math)}body{background:var(--calc-bg-page);color:var(--calc-text-primary);margin:0;padding:0;font-family:Inter,Plus Jakarta Sans,sans-serif;line-height:1.6}.main-container{max-width:1300px;margin:0 auto;padding:0 20px 24px}.calc-breadcrumb{color:var(--calc-text-dim);padding:10px 20px;font-size:.82rem}.calc-breadcrumb a{color:var(--calc-text-faded);text-decoration:none}.calc-breadcrumb a:hover{color:var(--calc-cyan)}.calc-title{text-align:center;letter-spacing:-.02em;color:var(--calc-text-primary);margin:10px 0 4px;font-size:2rem;font-weight:800}.calc-subtitle{text-align:center;color:var(--calc-text-faded);margin:0 0 20px;font-size:1rem}.tab-nav{background:var(--calc-bg-input);border:1px solid var(--calc-border-subtle);border-radius:12px;gap:4px;margin-bottom:20px;padding:4px;display:flex}.tab-btn{color:var(--calc-text-faded);cursor:pointer;background:0 0;border:none;border-radius:8px;flex:1;padding:8px 16px;font-family:inherit;font-size:.9rem;font-weight:600;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.tab-btn:hover{color:var(--calc-text-primary)}.tab-btn.active{background:var(--calc-cyan);color:#000}.tab-content{display:none}.tab-content.active{display:block}.calc-layout{grid-template-columns:1fr 1.4fr;align-items:start;gap:20px;display:grid}@media (width<=768px){.calc-layout{grid-template-columns:minmax(0,1fr);overflow:hidden}}.card{background:var(--calc-bg-card);border:1px solid var(--calc-border-subtle);box-sizing:border-box;border-radius:14px;padding:20px}.input-card{border-left:3px solid var(--calc-cyan)}.result-card{border-left:3px solid var(--calc-purple)}.section-label{color:var(--calc-text-faded);text-transform:uppercase;letter-spacing:.08em;border-bottom:1px solid var(--calc-border-subtle);margin-bottom:10px;padding-bottom:8px;font-size:.72rem;font-weight:700}.form-group{margin-bottom:14px}.form-label{color:var(--calc-text-faded);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px;font-size:.78rem;font-weight:600;display:block}select.glass-input optgroup{color:#88a;font-size:.8rem;font-style:normal;font-weight:700}input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}.btn{cursor:pointer;border:none;border-radius:8px;padding:10px 20px;font-family:inherit;font-size:.9rem;font-weight:600;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.btn-secondary{background:var(--calc-bg-input);color:var(--calc-text-faded);border:1px solid var(--calc-border-default);width:100%;margin-top:8px}.btn-secondary:hover{color:var(--calc-text-primary);border-color:var(--calc-cyan)}.hero-result{text-align:center;padding:20px 10px 16px}.hero-label{color:var(--calc-text-faded);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;font-size:.72rem;font-weight:700}.hero-value{color:var(--calc-text-primary);letter-spacing:-.02em;word-break:break-all;margin-bottom:8px;font-size:2.4rem;font-weight:800;line-height:1.1}.hero-sub{color:var(--calc-text-faded);font-size:.88rem}.stat-grid{gap:10px;margin-top:16px;display:grid}.stat-grid--8{grid-template-columns:repeat(4,1fr)}@media (width<=1024px){.stat-grid--8{grid-template-columns:repeat(2,1fr)}}@media (width<=480px){.stat-grid--8,.stat-grid{grid-template-columns:1fr}}.stat-card{border:1px solid var(--calc-border-subtle);text-align:center;background:#ffffff08;border-radius:10px;padding:12px}.stat-card .s-label{color:var(--calc-text-dim);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.72rem}.stat-card .s-value{color:var(--calc-text-primary);word-break:break-all;font-size:.92rem;font-weight:700;font-family:var(--calc-font-mono)}.preset-chips-label{color:#88a;text-transform:uppercase;letter-spacing:.06em;margin:16px 0 6px;font-size:.72rem;font-weight:700}.preset-chips{flex-wrap:wrap;gap:6px;display:flex}.preset-chip{cursor:pointer;color:#22d3ee;white-space:nowrap;background:#22d3ee14;border:1px solid #22d3ee47;border-radius:20px;padding:5px 13px;font-family:inherit;font-size:.79rem;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.preset-chip:hover{background:#22d3ee2e;border-color:#22d3ee;box-shadow:0 0 8px #22d3ee40}.preset-chip.active{background:#22d3ee38;border-color:#22d3ee;font-weight:700}.svg-viz-wrap{background:#22d3ee0a;border:1px solid #22d3ee24;border-radius:12px;margin:16px 0 0;padding:14px 16px 12px}.svg-viz-label{color:#88a;text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px;font-size:.72rem;font-weight:700}#scale-svg{width:100%;display:block}.svg-viz-legend{color:#88a;text-align:center;min-height:1.2em;margin-top:6px;font-size:.82rem}.compare-chips{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.compare-chip{cursor:pointer;color:#a855f7;background:#a855f714;border:1px solid #a855f740;border-radius:20px;padding:6px 16px;font-family:inherit;font-size:.84rem;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.compare-chip:hover{background:#a855f72e;border-color:#a855f7}.compare-chip.active{color:#fff;background:#a855f738;border-color:#a855f7;font-weight:700}.compare-hero{text-align:center;background:#22d3ee0f;border:1px solid #22d3ee33;border-radius:12px;margin-bottom:12px;padding:18px}.compare-hero-text{color:#fff;min-height:1.4em;font-size:1.05rem;font-weight:700;line-height:1.5}.compare-item{border-bottom:1px solid #ffffff0d;align-items:center;gap:12px;padding:10px 0;display:flex}.compare-item:last-child{border-bottom:none}.compare-item-icon{text-align:center;flex-shrink:0;width:26px;font-size:1.35rem}.compare-item-label{color:#ccc;font-size:.9rem;font-weight:600}.compare-item-val{color:#88a;font-family:Courier New,monospace;font-size:.82rem}.compare-item-bar-wrap{background:#ffffff14;border-radius:3px;width:80px;margin-top:4px;overflow:hidden}.compare-item-bar{background:#22d3ee;border-radius:3px;min-width:2px;height:5px;transition:width .3s}.how-to-toggle{color:#22d3ee;cursor:pointer;text-align:left;background:0 0;border:1px solid #22d3ee33;border-radius:8px;width:100%;margin-top:14px;padding:10px 14px;font-family:inherit;font-size:.88rem;font-weight:600;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.how-to-toggle:hover{background:#22d3ee0f}.how-to-body{background:#22d3ee08;border:1px solid #22d3ee1a;border-radius:8px;margin-top:6px;padding:14px}.how-to-step{color:#ccc;margin-bottom:8px;font-size:.87rem;line-height:1.6}.how-to-step:last-child{margin-bottom:0}.how-to-step code{color:#22d3ee;background:#22d3ee12;border-radius:4px;padding:2px 6px;font-family:Courier New,monospace;font-size:.84rem}.chart-wrap{background:#ffffff05;border:1px solid #ffffff12;border-radius:12px;margin-top:16px;padding:18px}.chart-wrap h3{color:#88a;text-transform:uppercase;letter-spacing:.05em;margin:0 0 10px;font-size:.78rem;font-weight:700}.ref-table{border-collapse:collapse;width:100%;margin-top:8px;font-size:.88rem}.ref-table th{background:var(--calc-bg-input);color:var(--calc-text-faded);text-transform:uppercase;letter-spacing:.05em;text-align:left;border-bottom:1px solid var(--calc-border-subtle);padding:9px 12px;font-size:.72rem}.ref-table td{color:var(--calc-text-primary);border-bottom:1px solid #ffffff0a;padding:9px 12px}.ref-table tr:hover 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.ref-val{color:#22d3ee;font-size:.95rem;font-weight:700}.conv-table-wrap{margin-top:1rem;overflow-x:auto}.conv-table{border-collapse:collapse;width:100%;font-size:.88rem}.conv-table th{color:#22d3ee;text-align:left;background:#22d3ee1a;border-bottom:1px solid #22d3ee33;padding:.5rem .8rem;font-weight:600}.conv-table td{color:#ccc;cursor:pointer;border-bottom:1px solid #ffffff0d;padding:.45rem .8rem;transition:background .15s}.conv-table tr:hover td{color:#fff;background:#22d3ee0f}.u-section{margin:48px 0 0}.u-title{color:#fff;letter-spacing:-.01em;border-bottom:1px solid #ffffff12;margin:0 0 18px;padding-bottom:10px;font-size:1.3rem;font-weight:800}.upgrade-wrap{max-width:1024px;margin:0 auto;padding:0 20px;overflow-x:hidden}.act-row,.act-row2{flex-wrap:wrap;gap:10px;margin-top:14px;display:flex}.act-btn,.act-btn2{color:#88a;cursor:pointer;background:#ffffff0a;border:1px solid #ffffff1a;border-radius:8px;padding:8px 16px;font-family:inherit;font-size:.84rem;font-weight:600;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.act-btn:hover,.act-btn2:hover{color:#22d3ee;background:#22d3ee14;border-color:#22d3ee4d}.formula-pills2{flex-wrap:wrap;gap:10px;display:flex}.fp2{background:#a855f714;border:1px solid #a855f740;border-radius:10px;flex-direction:column;flex:180px;gap:5px;min-width:160px;padding:13px 16px;display:flex}.fp2-label{color:#a855f7;text-transform:uppercase;letter-spacing:.06em;font-size:.73rem;font-weight:700}.fp2-eq{color:#fff;font-family:Courier New,monospace;font-size:.96rem;font-weight:700}.fp2-desc{color:#88a;margin:0;font-size:.8rem}.gloss-grid2{grid-template-columns:repeat(auto-fit,minmax(195px,1fr));gap:10px;display:grid}.glossary-chip{background:#ffffff05;border:1px solid #ffffff12;border-radius:10px;padding:13px 14px}.glossary-chip dt{color:#22d3ee;margin:0 0 4px;font-size:.85rem;font-weight:700;display:block}.glossary-chip dd{color:#88a;margin:0;font-size:.82rem}.rel-grid2{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;display:grid}.rel-card2{color:#88a;background:#ffffff05;border:1px solid #ffffff12;border-radius:10px;padding:12px 14px;font-size:.87rem;text-decoration:none;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s;display:block}.rel-card2:hover{color:#22d3ee;background:#22d3ee0f;border-color:#22d3ee40}.faq-section-extra .faq-item-enhanced{border:1px solid #ffffff12;border-radius:10px;margin-bottom:8px;overflow:hidden}.faq-section-extra .faq-q{cursor:pointer;color:#fff;text-align:left;background:0 0;border:none;justify-content:space-between;align-items:center;width:100%;padding:14px 16px;font-family:inherit;font-size:.93rem;font-weight:600;display:flex}.faq-section-extra .faq-a{color:#88a;padding:0 16px 14px;font-size:.87rem;line-height:1.65;display:none}.faq-section-extra .faq-item.open .faq-a{display:block}.calc-back-to-top{z-index:998;background:var(--calc-bg-card);border:1px solid var(--calc-border-default);width:40px;height:40px;color:var(--calc-text-faded);cursor:pointer;opacity:0;pointer-events:none;border-radius:50%;justify-content:center;align-items:center;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s;display:flex;position:fixed;bottom:24px;right:24px}.calc-back-to-top.visible{opacity:1;pointer-events:auto}.calc-back-to-top:hover{border-color:var(--calc-cyan);color:var(--calc-cyan)}[data-theme=light]{--accent:var(--calc-color-math)}[data-theme=light] body{color:#0f172a;background:#e8edf5}[data-theme=light] .tab-btn{color:#64748b}[data-theme=light] .tab-btn:hover{color:#0f172a}[data-theme=light] .tab-btn.active{color:#fff;background:#0891b2}[data-theme=light] .card{background:#fff;border-color:#0000001a;box-shadow:0 2px 10px #00000012}[data-theme=light] .input-card{border-left:3px solid #0891b2}[data-theme=light] .result-card{border-left:3px solid #7c3aed}[data-theme=light] select.glass-input optgroup{color:#475569}[data-theme=light] .btn-secondary{color:#334155;background:#f0f4f9;border-color:#00000024}[data-theme=light] .btn-secondary:hover{color:#0f172a;border-color:#0891b2}[data-theme=light] .hero-value{color:#0f172a}[data-theme=light] .hero-sub,[data-theme=light] .hero-label{color:#475569}[data-theme=light] .stat-card{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .stat-card .s-value{color:#0f172a}[data-theme=light] .stat-card .s-label{color:#64748b}[data-theme=light] .section-label{color:#475569;border-bottom-color:#0000001a}[data-theme=light] .preset-chips-label{color:#64748b}[data-theme=light] .preset-chip{color:#0891b2;background:#0891b20f;border-color:#0891b259}[data-theme=light] .preset-chip:hover{box-shadow:none;background:#0891b21f;border-color:#0891b2}[data-theme=light] .preset-chip.active{background:#0891b229;border-color:#0891b2}[data-theme=light] .svg-viz-wrap{background:#0891b20a;border-color:#0891b22e}[data-theme=light] .svg-viz-label{color:#64748b}[data-theme=light] .svg-viz-legend{color:#475569}[data-theme=light] .compare-chips .compare-chip{color:#7c3aed;background:#7c3aed0f;border-color:#7c3aed40}[data-theme=light] .compare-chip:hover{background:#7c3aed1f;border-color:#7c3aed}[data-theme=light] .compare-chip.active{color:#fff;background:#7c3aed;border-color:#7c3aed}[data-theme=light] .compare-hero{background:#0891b20d;border-color:#0891b233}[data-theme=light] .compare-hero-text{color:#0f172a}[data-theme=light] .compare-item{border-bottom-color:#00000012}[data-theme=light] .compare-item-label{color:#0f172a}[data-theme=light] .compare-item-val{color:#0891b2}[data-theme=light] .compare-item-bar{background:#0891b2}[data-theme=light] .compare-item-bar-wrap{background:#00000014}[data-theme=light] .how-to-toggle{color:#0891b2;border-color:#0891b24d}[data-theme=light] .how-to-toggle:hover{background:#0891b20d}[data-theme=light] .how-to-body{background:#0891b208;border-color:#0891b226}[data-theme=light] .how-to-step{color:#334155}[data-theme=light] .how-to-step code{color:#0891b2;background:#0891b212}[data-theme=light] .chart-wrap{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}[data-theme=light] .chart-wrap h3{color:#475569}[data-theme=light] .ref-table th{color:#475569;background:#f0f4f9;border-bottom-color:#0000001a}[data-theme=light] .ref-table td{color:#0f172a;border-bottom-color:#0000000f}[data-theme=light] .ref-table tr:hover td{background:#f0f4f9}[data-theme=light] .formula-box{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .formula-box .f-eq{color:#0891b2}[data-theme=light] .u-title{color:#0f172a;border-bottom-color:#0000001a}[data-theme=light] .ref-card-v{background:#0891b20d;border-color:#0891b226}[data-theme=light] .ref-card-v:hover{background:#0891b21a;border-color:#0891b259}[data-theme=light] .ref-card-v .ref-val{color:#0891b2}[data-theme=light] .ref-card-v .ref-label{color:#64748b}[data-theme=light] .conv-table th{color:#0891b2;background:#0891b214;border-bottom-color:#0891b22e}[data-theme=light] .conv-table td{color:#475569;border-bottom-color:#00000012}[data-theme=light] .conv-table tr:hover td{color:#0f172a;background:#0891b20a}[data-theme=light] .act-btn,[data-theme=light] .act-btn2{color:#475569;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .act-btn:hover,[data-theme=light] .act-btn2:hover{color:#0891b2;background:#0891b214;border-color:#0891b24d}[data-theme=light] .fp2{background:#7c3aed12;border-color:#7c3aed33}[data-theme=light] .fp2-label{color:#7c3aed}[data-theme=light] .fp2-eq{color:#0f172a}[data-theme=light] .glossary-chip{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .glossary-chip dt{color:#0891b2}[data-theme=light] .glossary-chip dd{color:#475569}[data-theme=light] .rel-card2{color:#475569;background:#f0f4f9;border-color:#0000001a}[data-theme=light] .rel-card2:hover{color:#0891b2;background:#0891b20f;border-color:#0891b240}[data-theme=light] .faq-section-extra .faq-item-enhanced{border-color:#0000001a}[data-theme=light] .faq-section-extra .faq-q{color:#0f172a}[data-theme=light] .faq-section-extra .faq-a{color:#475569}[data-theme=light] .faq-item-enhanced{background:#fff;border-color:#0000001a}[data-theme=light] .faq-q{color:#0f172a}[data-theme=light] .faq-q:after{color:#0891b2}[data-theme=light] .faq-a{color:#475569}[data-theme=light] .calc-section__title{color:#0f172a}[data-theme=light] .calc-howto-card{background:#fff;border-color:#0000001a}[data-theme=light] .calc-example-card{background:#fff;border-color:#0000001a #0000001a #0000001a #7c3aed;border-left-style:solid;border-left-width:3px}[data-theme=light] .calc-glossary-item{border-color:#0000001a}[data-theme=light] .calc-formula-box{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .calc-formula-box__equation{color:#0891b2}[data-theme=light] .calc-comparison-table thead th{color:#0f172a;background:#f0f4f9}[data-theme=light] .calc-comparison-table tbody td{color:#334155}[data-theme=light] .calc-back-to-top{color:#475569;background:#fff;border-color:#0000001f}[data-theme=light] .calc-back-to-top:hover{color:#0891b2;border-color:#0891b2}[data-theme=light] .compare-chip{color:#7c3aed}