:root{--bg-dark:#050510;--card:#ffffff0a;--input-bg:#ffffff0f;--border:#ffffff14;--cyan:#00f3ff;--purple:#bc13fe;--accent:#3b82f6;--accent-dim:#3b82f62e;--text-main:#fff;--text-dim:#88a;--text-muted:#666680;--font-sans:"Plus Jakarta Sans", "Inter", sans-serif;--font-mono:"JetBrains Mono", monospace;--radius:12px;--radius-sm:8px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-dark);color:var(--text-main);font-family:var(--font-sans);min-height:100vh;font-size:.95rem;line-height:1.6}.glass-navbar{z-index:100;backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#050510eb;align-items:center;gap:1.5rem;padding:.65rem 1.5rem;display:flex;position:sticky;top:0}.nav-link.active{color:var(--accent)}.calc-wrapper{max-width:1200px;margin:0 auto;padding:1.5rem 1.5rem 2rem}.page-title{color:var(--text-main);margin-bottom:.25rem;font-size:clamp(1.5rem,3vw,2rem);font-weight:700}.page-desc{color:var(--text-dim);margin-bottom:1.5rem;font-size:.9rem}.outer-tabs{border-radius:var(--radius);border:1px solid var(--border);background:#ffffff0a;gap:4px;width:fit-content;margin-bottom:1.5rem;padding:4px;display:flex}.outer-tab{border-radius:var(--radius-sm);color:var(--text-dim);font-family:var(--font-sans);cursor:pointer;white-space:nowrap;background:0 0;border:none;padding:.45rem 1.1rem;font-size:.85rem;font-weight:600;transition:background .2s,color .2s}.outer-tab:hover{color:var(--text-main);background:#ffffff0f}.outer-tab.active{background:var(--accent);color:#fff;box-shadow:0 2px 8px #3b82f659}.tab-panel{display:none}.tab-panel.active{display:block}.calc-grid{grid-template-columns:1fr 1fr;align-items:start;gap:1.25rem;display:grid}@media (width<=900px){.calc-grid{grid-template-columns:1fr}}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}.card-title{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--text-dim);margin-bottom:1rem;font-size:.7rem}.input-card{border-left:3px solid var(--cyan)}.result-card{border-left:3px solid var(--purple)}.mode-toggle{border-radius:var(--radius-sm);border:1px solid var(--border);background:#ffffff0d;gap:3px;margin-bottom:1.25rem;padding:3px;display:flex}.mode-btn{color:var(--text-dim);font-family:var(--font-sans);cursor:pointer;text-align:center;background:0 0;border:none;border-radius:6px;flex:1;padding:.4rem .6rem;font-size:.8rem;font-weight:600;transition:background .2s,color 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1.25rem}.ops-result-label{font-size:.7rem;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin-bottom:.3rem}.ops-result-sci{font-family:var(--font-mono);color:var(--accent);margin-bottom:.15rem;font-size:1.4rem;font-weight:700}.ops-result-sci sup{vertical-align:super;font-size:.6em;line-height:0}.ops-result-std{color:var(--text-dim);font-size:.85rem;font-family:var(--font-mono)}.ops-row{grid-template-columns:1fr auto 1fr;align-items:end;gap:.75rem;margin-bottom:1.25rem;display:grid}.ops-op-col{flex-direction:column;align-items:center;display:flex}.ops-op-label{font-size:.7rem;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim);margin-bottom:.35rem}.glass-select{background:var(--input-bg);border:1px solid 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li{color:var(--text-dim);font-size:.85rem;line-height:1.6}.steps-list strong{color:var(--text-main)}.steps-list sup{vertical-align:super;font-size:.65em;line-height:0}.action-row{border-top:1px solid var(--border);gap:.6rem;margin-top:1rem;padding-top:1rem;display:flex}.btn-action{border-radius:var(--radius-sm);border:1px solid var(--border);color:var(--text-dim);font-family:var(--font-sans);cursor:pointer;background:0 0;align-items:center;gap:.4rem;padding:.45rem .9rem;font-size:.8rem;font-weight:600;transition:border-color .2s,color .2s,background .2s;display:flex}.btn-action:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}.scale-section{flex-direction:column;gap:1.5rem;display:flex}.scale-input-row{flex-wrap:wrap;align-items:center;gap:.75rem;display:flex}.scale-input-row .glass-input{max-width:240px}.scale-msg{color:var(--text-dim);flex:1;min-width:160px;font-size:.85rem}.scale-track-wrap{height:56px;margin:.5rem 0 1rem;position:relative}.scale-track{background:linear-gradient(90deg,#3b82f64d 0%,#3b82f6b3 50%,#3b82f64d 100%);border-radius:3px;height:6px;position:absolute;top:16px;left:0;right:0}.scale-tick{background:var(--border);width:2px;height:14px;position:absolute;top:-4px;transform:translate(-50%)}.scale-tick-label{font-family:var(--font-mono);color:var(--text-muted);white-space:nowrap;font-size:.6rem;position:absolute;top:16px;left:50%;transform:translate(-50%)}#scale-dot{background:var(--accent);z-index:2;border:2px solid #fff;border-radius:50%;width:16px;height:16px;transition:left .3s;position:absolute;top:8px;transform:translate(-50%);box-shadow:0 0 10px #3b82f699}#scale-dot-label{font-family:var(--font-mono);color:var(--accent);white-space:nowrap;background:var(--bg-dark);pointer-events:none;border-radius:4px;padding:1px 4px;font-size:.65rem;position:absolute;top:-22px;transform:translate(-50%)}#scale-dot-label sup{vertical-align:super;font-size:.65em;line-height:0}.scale-table-wrap{border:1px solid var(--border);border-radius:var(--radius);overflow-x:auto}#scale-table{border-collapse:collapse;width:100%;font-size:.82rem}#scale-table th{color:var(--text-dim);font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.08em;text-align:left;border-bottom:1px solid var(--border);background:#ffffff0d;padding:.5rem .75rem;font-size:.7rem}#scale-table td{color:var(--text-dim);border-bottom:1px solid #ffffff0a;padding:.45rem .75rem}#scale-table td:first-child{font-family:var(--font-mono);color:var(--accent);white-space:nowrap;font-size:.8rem;font-weight:600}#scale-table tbody tr:hover{background:#ffffff08}#scale-table tbody tr:last-child td{border-bottom:none}.scale-row-active{background:#3b82f61a!important}.scale-row-active td{color:var(--text-main)!important}.page-sections-outer{max-width:1600px;margin:0 auto;padding:0 1.5rem 3rem}.calc-section{border-top:1px solid var(--border);margin-bottom:2.5rem;padding-top:1.5rem}.calc-section__title{color:var(--text-main);margin-bottom:1rem;font-size:1.15rem;font-weight:700}.how-steps{flex-direction:column;gap:1rem;display:flex}.how-step{align-items:flex-start;gap:1rem;display:flex}.how-step-num{background:var(--accent);width:28px;height:28px;font-family:var(--font-mono);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.75rem;font-weight:700;display:flex}.how-step-text{color:var(--text-dim);padding-top:3px;font-size:.9rem;line-height:1.7}.how-step-text strong{color:var(--text-main)}.formula-pills{flex-wrap:wrap;gap:.6rem;display:flex}.formula-pill{border-radius:var(--radius-sm);font-family:var(--font-mono);color:var(--accent);background:#3b82f61a;border:1px solid #3b82f640;padding:.4rem .9rem;font-size:.85rem}.formula-pill sup{vertical-align:super;font-size:.65em;line-height:0}.gloss-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.75rem;display:grid}.gloss-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.75rem 1rem}.gloss-term{color:var(--accent);margin-bottom:.25rem;font-size:.85rem;font-weight:700}.gloss-def{color:var(--text-dim);font-size:.8rem;line-height:1.5}.examples-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:.75rem;display:grid}.example-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.9rem 1rem}.example-title{color:var(--text-main);margin-bottom:.3rem;font-size:.85rem;font-weight:700}.example-val{font-family:var(--font-mono);color:var(--accent);margin-bottom:.25rem;font-size:1rem;font-weight:700}.example-val sup{vertical-align:super;font-size:.65em;line-height:0}.example-note{color:var(--text-dim);font-size:.78rem}.calc-article{color:var(--text-dim);font-size:.88rem;line-height:1.8}.calc-article p{margin-bottom:.85rem}.calc-article strong{color:var(--text-main)}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid #ffffff0f}.faq-item__question{cursor:pointer;color:var(--text-main);user-select:none;justify-content:space-between;align-items:center;padding:14px 4px;font-size:.9rem;font-weight:600;list-style:none;transition:color .2s;display:flex}.faq-item__question::-webkit-details-marker{display:none}.faq-item__question:after{content:"+";font-family:var(--font-mono);color:var(--text-dim);flex-shrink:0;margin-left:16px;font-size:1.1rem;transition:color .2s}.faq-item[open] .faq-item__question:after{content:"−";color:var(--accent)}.faq-item__question:hover{color:var(--accent)}.faq-item__answer{color:var(--text-dim);padding:0 4px 14px;font-size:.85rem;line-height:1.75}.calc-related__grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.75rem;display:grid}.toast{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-main);opacity:0;z-index:9999;background:#1e293b;padding:.7rem 1rem;font-size:.85rem;transition:opacity .25s,transform .25s;position:fixed;bottom:1.5rem;right:1.5rem;transform:translateY(8px);box-shadow:0 4px 20px #0006}.toast.show{opacity:1;transform:none}.toast-success{border-left:3px solid var(--cyan)}.toast-warn{border-left:3px solid #fbbf24}.toast-error{border-left:3px solid #f87171}.calc-back-to-top{border:1px solid var(--border);width:40px;height:40px;color:var(--text-dim);cursor:pointer;opacity:0;pointer-events:none;background:#ffffff12;border-radius:50%;justify-content:center;align-items:center;font-size:1.3rem;transition:opacity .3s;display:flex;position:fixed;bottom:1.5rem;left:1.5rem}[data-theme=light]{--bg-dark:#e8edf5;--card:#fffffff2;--input-bg:#e8eef4;--border:#0000001a;--accent:#1d4ed8;--accent-dim:#1d4ed81a;--text-main:#0f172a;--text-dim:#334155;--text-muted:#64748b}[data-theme=light] body{background:#e8edf5}[data-theme=light] .glass-navbar{backdrop-filter:blur(12px);background:#f8fafcf2;border-bottom:1px solid #0000001a}[data-theme=light] .card{background:#fff;border-color:#0000001f;box-shadow:0 2px 10px #00000012}[data-theme=light] .outer-tabs{background:#0000000a;border-color:#0000001a}[data-theme=light] .outer-tab:hover{background:#0000000f}[data-theme=light] .outer-tab.active{background:#1d4ed8;box-shadow:0 2px 8px #1d4ed84d}[data-theme=light] .mode-toggle{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .mode-btn.active{background:#1d4ed8}[data-theme=light] .glass-input{color:#0f172a;background:#f0f4f9;border-color:#0000001f}[data-theme=light] 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.faq-item:hover{border-color:#1d4ed859;box-shadow:0 2px 10px #1d4ed814}[data-theme=light] .faq-item[open]{border-color:#1d4ed866 #1d4ed866 #1d4ed866 #1d4ed8;border-left-style:solid;border-left-width:3px;box-shadow:0 2px 12px #1d4ed81a}[data-theme=light] .faq-item__question{color:#0f172a;padding:14px 16px}[data-theme=light] .faq-item__question:after{color:#64748b}[data-theme=light] .faq-item[open] .faq-item__question:after,[data-theme=light] .faq-item__question:hover{color:#1d4ed8}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f;padding:12px 16px 16px}[data-theme=light] .toast{color:#0f172a;background:#fff;border-color:#0000001f;box-shadow:0 4px 20px #00000026}