:root{--bg-dark:#050510;--card:#0d0d1f;--input-bg:#111827;--text-main:#fff;--text-dim:#88a;--text-muted:#666;--cyan:#00f3ff;--purple:#bc13fe;--border:#ffffff12;--border-mid:#ffffff1f;--accent:var(--cyan);--accent-glow:#00f3ff1f;--font-mono:"JetBrains Mono","Courier New",monospace}body{background:var(--bg-dark);color:var(--text-main);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-title{text-align:center;letter-spacing:-.02em;color:var(--text-main);margin:14px 0 4px;font-size:2rem;font-weight:800}.calc-subtitle{text-align:center;color:var(--text-dim);margin:0 0 20px;font-size:1rem}.tab-nav{background:var(--input-bg);border:1px solid var(--border);border-radius:12px;gap:4px;margin-bottom:20px;padding:4px;display:flex}.tab-btn{color:var(--text-dim);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:all .2s}.tab-btn:hover{color:var(--text-main)}.tab-btn.active{background:var(--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<=700px){.calc-layout{grid-template-columns:minmax(0,1fr);overflow:hidden}}.card{background:var(--card);border:1px solid var(--border);box-sizing:border-box;border-radius:14px;padding:20px}.input-card{border-left:3px solid var(--cyan)}.result-card{border-left:3px solid var(--purple)}.section-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;border-bottom:1px solid 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14px;font-size:.85rem;display:none}.live-formula.visible{display:block}.act-bar{flex-wrap:wrap;gap:8px;margin-top:14px;display:none}.act-bar.visible{display:flex}.act-btn{border:1px solid var(--border-mid);color:var(--text-dim);cursor:pointer;background:#ffffff0a;border-radius:8px;padding:7px 14px;font-family:inherit;font-size:.82rem;font-weight:600;transition:all .2s}.act-btn:hover{color:var(--cyan);background:#00f3ff14;border-color:#00f3ff4d}.domain-badge{text-transform:uppercase;letter-spacing:.05em;border-radius:20px;padding:2px 8px;font-size:.68rem;font-weight:700;display:inline-block}.domain-physics{color:#00f3ff;background:#00f3ff1f}.domain-food{color:#10b981;background:#10b9811f}.domain-electrical{color:#fbbf24;background:#fbbf241f}.domain-industrial{color:#f97316;background:#f973161f}.domain-mechanical{color:#bc13fe;background:#bc13fe1f}.all-conv-table{border-collapse:collapse;width:100%;margin-top:8px;font-size:.88rem}.all-conv-table th{color:var(--cyan);text-align:left;text-transform:uppercase;letter-spacing:.05em;background:#00f3ff14;border-bottom:1px solid #00f3ff26;padding:9px 12px;font-size:.72rem;font-weight:700}.all-conv-table td{border-bottom:1px solid var(--border);color:var(--text-dim);cursor:pointer;vertical-align:middle;padding:9px 12px;transition:background .15s}.all-conv-table tr:hover td{color:var(--text-main);background:#00f3ff0d}.all-conv-table .unit-name{color:var(--text-main);font-weight:600}.all-conv-table .unit-value{font-family:var(--font-mono);color:var(--cyan)}.all-conv-table tr.active-row td{background:#00f3ff14}.all-conv-table tr.active-row .unit-value{color:#fff}.table-hint{color:var(--text-muted);text-align:center;margin:8px 0 0;font-size:.78rem}.scale-chart-wrap{height:240px;position:relative}.ref-table{border-collapse:collapse;width:100%;margin-top:8px;font-size:.88rem}.ref-table th{background:var(--input-bg);color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em;text-align:left;border-bottom:1px solid var(--border);padding:9px 12px;font-size:.72rem}.ref-table td{color:var(--text-main);border-bottom:1px solid #ffffff0a;padding:9px 12px}.ref-table tr:hover td{background:#ffffff08}.formula-box{background:var(--input-bg);border:1px solid var(--border);border-radius:10px;margin-bottom:10px;padding:14px 16px}.formula-box .f-title{color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px;font-size:.75rem;font-weight:700}.formula-box .f-eq{font-family:var(--font-mono);color:var(--cyan);font-size:.95rem}.fp-row{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.fp{background:#bc13fe14;border:1px solid #bc13fe38;border-radius:8px;align-items:baseline;gap:8px;padding:9px 14px;display:inline-flex}.fp-eq{font-family:var(--font-mono);color:var(--purple);font-size:.85rem}.fp-desc{color:var(--text-muted);font-size:.77rem}.ref-grid-visual{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin-top:10px;display:grid}.ref-card-v{text-align:center;background:#00f3ff0a;border:1px solid #00f3ff24;border-radius:10px;padding:14px}.ref-card-v .ref-icon{margin-bottom:6px;font-size:1.7rem;display:block}.ref-card-v .ref-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.72rem;display:block}.ref-card-v .ref-val{color:var(--cyan);font-size:.9rem;font-weight:700}.conv-table-wrap{margin-top:10px;overflow-x:auto}.conv-table{border-collapse:collapse;width:100%;font-size:.86rem}.conv-table th{color:var(--cyan);text-align:left;background:#00f3ff17;border-bottom:1px solid #00f3ff2e;padding:8px 10px;font-weight:600}.conv-table td{border-bottom:1px solid var(--border);color:var(--text-dim);cursor:pointer;padding:7px 10px;transition:background .15s}.conv-table tr:hover td{color:var(--text-main);background:#00f3ff0d}.u-section{margin-bottom:28px}.u-title{color:var(--text-main);letter-spacing:-.01em;border-bottom:1px solid var(--border);margin:0 0 14px;padding-bottom:8px;font-size:1.1rem;font-weight:800}.toast{background:var(--card);border:1px solid var(--border-mid);color:var(--text-main);opacity:0;pointer-events:none;border-radius:10px;align-items:center;gap:8px;min-width:160px;padding:10px 16px;font-size:.85rem;transition:opacity .25s,transform .25s;display:flex;transform:translate(20px);box-shadow:0 4px 20px #0006}.toast.show{opacity:1;transform:translate(0)}.toast-success{border-left:3px solid #10b981}.toast-warn{border-left:3px solid #f59e0b}.toast-error{border-left:3px solid #ef4444}.page-sections-outer{max-width:1300px;margin:0 auto;padding:0 20px 3rem}.calc-breadcrumb{color:var(--text-muted);padding:10px 20px;font-size:.82rem}.calc-breadcrumb a{color:var(--text-dim);text-decoration:none}.calc-breadcrumb a:hover{color:var(--cyan)}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid var(--border)}.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(--cyan)}.faq-item__question:hover{color:var(--cyan)}.faq-item__answer{color:var(--text-dim);padding:0 4px 14px;font-size:.84rem;line-height:1.75}.calc-back-to-top{z-index:998;background:var(--card);border:1px solid var(--border-mid);width:40px;height:40px;color:var(--text-dim);cursor:pointer;opacity:0;pointer-events:none;border-radius:50%;justify-content:center;align-items:center;transition:all .2s;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(--cyan);color:var(--cyan)}[data-theme=light]{--bg-dark:#e8edf5;--card:#fff;--input-bg:#f0f4f9;--text-main:#0f172a;--text-dim:#334155;--text-muted:#64748b;--cyan:#0e7490;--purple:#7c3aed;--border:#0000001a;--border-mid:#00000024;--accent:var(--cyan);--accent-glow:#0e74901f}[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:#0e7490}[data-theme=light] .card{background:#fff;border-color:#0000001a;box-shadow:0 2px 10px #00000012}[data-theme=light] .input-card{border-left:3px solid #0e7490}[data-theme=light] 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.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] .live-formula{color:#7c3aed;background:#7c3aed12;border-color:#7c3aed33}[data-theme=light] .act-btn{color:#475569;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .act-btn:hover{color:#0e7490;background:#0e749014;border-color:#0e74904d}[data-theme=light] .domain-physics{color:#0e7490;background:#0e74901a}[data-theme=light] .domain-food{color:#047857;background:#0596691a}[data-theme=light] .domain-electrical{color:#92400e;background:#a162071a}[data-theme=light] .domain-industrial{color:#9a3412;background:#c2410c1a}[data-theme=light] .domain-mechanical{color:#6d28d9;background:#6d28d91a}[data-theme=light] .all-conv-table th{color:#0e7490;background:#0e749014;border-bottom-color:#0e749033}[data-theme=light] .all-conv-table td{color:#475569;border-bottom-color:#00000012}[data-theme=light] 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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:#0e7490;border-color:#0e7490}