: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;--bg-panel:var(--card);--bg-input:var(--input-bg);--text-primary:var(--text-main);--text-secondary:var(--text-dim);--border-subtle:var(--border-mid);--border-focus:var(--cyan);--primary:var(--cyan)}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-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)}.calc-title{text-align:center;letter-spacing:-.02em;color:var(--text-main);margin:10px 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 var(--border);margin-bottom:10px;padding-bottom:8px;font-size:.72rem;font-weight:700}.form-group{margin-bottom:14px}.form-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px;font-size:.78rem;font-weight:600;display:block}.form-input{background:var(--input-bg);border:1px solid var(--border-mid);width:100%;color:var(--text-main);box-sizing:border-box;border-radius:8px;padding:10px 14px;font-family:inherit;font-size:1rem;transition:all .2s}.form-input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px var(--accent-glow);outline:none}select.form-input{-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml;charset=US-ASCII,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'292' height%3D'292'%3E%3Cpath fill%3D'%238888aa' d%3D'M287 69.4a17.6 17.6 0 0 0-13-5.4H18.4c-5 0-9.3 1.8-12.9 5.4A17.6 17.6 0 0 0 0 82.2c0 5 1.8 9.3 5.4 12.9l128 127.9c3.6 3.6 7.8 5.4 12.8 5.4s9.2-1.8 12.8-5.4L287 95c3.5-3.5 5.4-7.8 5.4-12.8 0-5-1.9-9.2-5.5-12.8z'%2F%3E%3C%2Fsvg%3E");background-position:right 12px center;background-repeat:no-repeat;background-size:10px;padding-right:32px}select.form-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:all .2s}.btn-secondary{background:var(--input-bg);color:var(--text-dim);border:1px solid var(--border-mid);width:100%;margin-top:8px}.btn-secondary:hover{color:var(--text-main);border-color:var(--cyan)}.hero-result{text-align:center;padding:20px 10px 16px}.hero-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;font-size:.72rem;font-weight:700}.hero-value{color:var(--text-main);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(--text-dim);font-size:.88rem}.stat-grid{gap:10px;margin-top:16px;display:grid}.stat-grid--8{grid-template-columns:repeat(4,1fr)}@media (width<=900px){.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(--border);text-align:center;background:#ffffff08;border-radius:10px;padding:12px}.stat-card .s-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.72rem}.stat-card .s-value{color:var(--text-main);word-break:break-all;font-size:.92rem;font-weight:700;font-family:var(--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:#00f3ff;white-space:nowrap;background:#00f3ff14;border:1px solid #00f3ff47;border-radius:20px;padding:5px 13px;font-family:inherit;font-size:.79rem;transition:all .18s}.preset-chip:hover{background:#00f3ff2e;border-color:#00f3ff;box-shadow:0 0 8px #00f3ff40}.preset-chip.active{background:#00f3ff38;border-color:#00f3ff;font-weight:700}.svg-viz-wrap{background:#00f3ff0a;border:1px solid #00f3ff24;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:#bc13fe;background:#bc13fe14;border:1px solid #bc13fe40;border-radius:20px;padding:6px 16px;font-family:inherit;font-size:.84rem;transition:all .18s}.compare-chip:hover{background:#bc13fe2e;border-color:#bc13fe}.compare-chip.active{color:#fff;background:#bc13fe38;border-color:#bc13fe;font-weight:700}.compare-hero{text-align:center;background:#00f3ff0f;border:1px solid #00f3ff33;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:#00f3ff;border-radius:3px;min-width:2px;height:5px;transition:width .3s}.how-to-toggle{color:#00f3ff;cursor:pointer;text-align:left;background:0 0;border:1px solid #00f3ff33;border-radius:8px;width:100%;margin-top:14px;padding:10px 14px;font-family:inherit;font-size:.88rem;font-weight:600;transition:all .2s}.how-to-toggle:hover{background:#00f3ff0f}.how-to-body{background:#00f3ff08;border:1px solid #00f3ff1a;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:#00f3ff;background:#00f3ff12;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(--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}.faq-section{max-width:720px;margin:40px auto 0;padding:0 20px 50px}.faq-title{text-align:center;margin-bottom:20px;font-size:1.3rem;font-weight:700}.faq-item{background:var(--card);border:1px solid var(--border);border-radius:10px;margin-bottom:8px;overflow:hidden}.faq-q{width:100%;color:var(--text-main);text-align:left;cursor:pointer;background:0 0;border:none;justify-content:space-between;align-items:center;padding:14px 16px;font-family:inherit;font-size:.95rem;font-weight:600;display:flex}.faq-q:after{content:"+";color:var(--cyan);flex-shrink:0;font-size:1.1rem}.faq-item.open .faq-q:after{content:"−"}.faq-a{color:var(--text-dim);padding:0 16px 14px;font-size:.9rem;line-height:1.6;display:none}.faq-item.open .faq-a{display:block}.ref-grid-visual{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.75rem;margin-top:1rem;display:grid}.ref-card-v{text-align:center;background:#00f3ff0f;border:1px solid #00f3ff2e;border-radius:10px;padding:.9rem 1rem;transition:all .18s}.ref-card-v:hover{background:#00f3ff1f;border-color:#00f3ff66;transform:translateY(-2px)}.ref-card-v .ref-icon{margin-bottom:.3rem;font-size:1.6rem;display:block}.ref-card-v .ref-label{color:#88a;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.2rem;font-size:.75rem;display:block}.ref-card-v .ref-val{color:#00f3ff;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:#00f3ff;text-align:left;background:#00f3ff1a;border-bottom:1px solid #00f3ff33;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:#00f3ff0f}.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:900px;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:all .2s}.act-btn:hover,.act-btn2:hover{color:#00f3ff;background:#00f3ff14;border-color:#00f3ff4d}.formula-pills2{flex-wrap:wrap;gap:10px;display:flex}.fp2{background:#bc13fe14;border:1px solid #bc13fe40;border-radius:10px;flex-direction:column;flex:180px;gap:5px;min-width:160px;padding:13px 16px;display:flex}.fp2-label{color:#bc13fe;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}.g-item2{background:#ffffff05;border:1px solid #ffffff12;border-radius:10px;padding:13px 14px}.g-item2 dt{color:#00f3ff;margin:0 0 4px;font-size:.85rem;font-weight:700;display:block}.g-item2 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:all .2s;display:block}.rel-card2:hover{color:#00f3ff;background:#00f3ff0f;border-color:#00f3ff40}.faq-section-extra .faq-item{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}.page-sections-outer{max-width:1300px;margin:0 auto;padding:0 20px 3rem}.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;--bg-panel:#fff;--bg-input:#f0f4f9;--text-primary:#0f172a;--text-secondary:#334155;--border-subtle:#00000024;--border-focus:#0e7490;--primary:#0e7490}[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] .result-card{border-left:3px solid #7c3aed}[data-theme=light] .form-input{color:#0f172a;background:#f0f4f9;border-color:#00000024}[data-theme=light] .form-input:focus{border-color:#0e7490;box-shadow:0 0 0 3px #0e74901f}[data-theme=light] select.form-input{background-image:url("data:image/svg+xml;charset=US-ASCII,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' width%3D'292' height%3D'292'%3E%3Cpath fill%3D'%2364748B' d%3D'M287 69.4a17.6 17.6 0 0 0-13-5.4H18.4c-5 0-9.3 1.8-12.9 5.4A17.6 17.6 0 0 0 0 82.2c0 5 1.8 9.3 5.4 12.9l128 127.9c3.6 3.6 7.8 5.4 12.8 5.4s9.2-1.8 12.8-5.4L287 95c3.5-3.5 5.4-7.8 5.4-12.8 0-5-1.9-9.2-5.5-12.8z'%2F%3E%3C%2Fsvg%3E")}[data-theme=light] select.form-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:#0e7490}[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:#0e7490;background:#0e74900f;border-color:#0e749059}[data-theme=light] .preset-chip:hover{box-shadow:none;background:#0e74901f;border-color:#0e7490}[data-theme=light] .preset-chip.active{background:#0e749029;border-color:#0e7490}[data-theme=light] .svg-viz-wrap{background:#0e74900a;border-color:#0e74902e}[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:#0e74900d;border-color:#0e749033}[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:#0e7490}[data-theme=light] .compare-item-bar{background:#0e7490}[data-theme=light] .compare-item-bar-wrap{background:#00000014}[data-theme=light] .how-to-toggle{color:#0e7490;border-color:#0e74904d}[data-theme=light] .how-to-toggle:hover{background:#0e74900d}[data-theme=light] .how-to-body{background:#0e749008;border-color:#0e749026}[data-theme=light] .how-to-step{color:#334155}[data-theme=light] .how-to-step code{color:#0e7490;background:#0e749012}[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:#0e7490}[data-theme=light] .u-title{color:#0f172a;border-bottom-color:#0000001a}[data-theme=light] .ref-card-v{background:#0e74900d;border-color:#0e749026}[data-theme=light] .ref-card-v:hover{background:#0e74901a;border-color:#0e749059}[data-theme=light] .ref-card-v .ref-val{color:#0e7490}[data-theme=light] .ref-card-v .ref-label{color:#64748b}[data-theme=light] .conv-table th{color:#0e7490;background:#0e749014;border-bottom-color:#0e74902e}[data-theme=light] .conv-table td{color:#475569;border-bottom-color:#00000012}[data-theme=light] .conv-table tr:hover td{color:#0f172a;background:#0e74900a}[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:#0e7490;background:#0e749014;border-color:#0e74904d}[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] .g-item2{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .g-item2 dt{color:#0e7490}[data-theme=light] .g-item2 dd{color:#475569}[data-theme=light] .rel-card2{color:#475569;background:#f0f4f9;border-color:#0000001a}[data-theme=light] .rel-card2:hover{color:#0e7490;background:#0e74900f;border-color:#0e749040}[data-theme=light] .faq-section-extra .faq-item{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{background:#fff;border-color:#0000001a}[data-theme=light] .faq-q{color:#0f172a}[data-theme=light] .faq-q:after{color:#0e7490}[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:#0e7490}[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:#0e7490;border-color:#0e7490}