:root{--accent:#10b981;--bg-app:#050510;--bg-card:#0d0d1f;--bg-input:#111128;--text-primary:#fff;--text-secondary:#88a;--text-muted:#557;--cyan:#00f3ff;--purple:#bc13fe;--green:#10b981;--red:#f43f5e;--amber:#f59e0b;--border:#ffffff14;--radius:12px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-app);color:var(--text-primary);min-height:100vh;font-family:Inter,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}.calc-breadcrumb{color:var(--text-muted);padding:10px 24px;font-size:.79rem}.calc-breadcrumb a{color:var(--text-secondary)}.calc-breadcrumb a:hover{color:var(--accent)}.main-container{max-width:1200px;margin:0 auto;padding:24px}.calc-title{margin-bottom:8px;font-size:2rem;font-weight:700}.calc-subtitle{color:var(--text-secondary);margin-bottom:24px;font-size:.95rem}.tab-nav{border-bottom:1px solid var(--border);margin-bottom:24px;display:flex}.tab-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 22px;font-family:inherit;font-size:.9rem;transition:all .2s}.tab-btn:hover{color:var(--text-primary)}.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.tab-content{display:none}.tab-content.active{display:block}.calc-layout{grid-template-columns:320px 1fr;align-items:start;gap:20px;display:grid}@media (width<=900px){.calc-layout{grid-template-columns:1fr}}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.input-card{border-left:3px solid var(--cyan)}.form-group{margin-bottom:16px}.form-label{color:var(--text-secondary);margin-bottom:6px;font-size:.82rem;font-weight:500;display:block}.form-input,.form-select{background:var(--bg-input);border:1px solid var(--border);width:100%;color:var(--text-primary);border-radius:8px;padding:10px 14px;font-family:inherit;font-size:.92rem;transition:border-color 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var(--purple);border-radius:var(--radius);padding:13px}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:5px;font-size:.71rem}.stat-value{color:var(--text-primary);font-size:1.05rem;font-weight:700}.formula-strip{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex;overflow-x:auto}.formula-pill{color:var(--accent);white-space:nowrap;background:#10b9811a;border:1px solid #10b9814d;border-radius:20px;flex-shrink:0;padding:5px 14px;font-size:.75rem}.action-bar{flex-wrap:wrap;gap:10px;margin-bottom:20px;display:flex}.btn-action{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:#ffffff0a;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-family:inherit;font-size:.82rem;transition:all .2s;display:flex}.btn-action:hover{border-color:var(--accent);color:var(--accent)}.btn-action 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var(--border);border-radius:var(--radius);padding:18px}.prog-card__title{color:var(--accent);margin-bottom:4px;font-size:.95rem;font-weight:700}.prog-card__desc{color:var(--text-muted);margin-bottom:14px;font-size:.78rem;line-height:1.4}.prog-week{border-bottom:1px solid #ffffff0a;justify-content:space-between;align-items:center;padding:7px 0;font-size:.83rem;display:flex}.prog-week:last-child{border-bottom:none}.prog-week__label{color:var(--text-secondary)}.prog-week__val{color:var(--text-primary);text-align:right;font-family:Courier New,monospace;font-size:.85rem;font-weight:600}.reverse-solver{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.reverse-inputs{grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;display:grid}@media (width<=600px){.reverse-inputs{grid-template-columns:1fr}}.reverse-result{text-align:center;background:#10b98114;border:1px solid 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var(--border);cursor:pointer;opacity:0;visibility:hidden;width:40px;height:40px;color:var(--text-secondary);z-index:99;border-radius:50%;justify-content:center;align-items:center;transition:all .3s;display:flex;position:fixed;bottom:24px;right:24px}.calc-back-to-top.visible{opacity:1;visibility:visible}.calc-back-to-top:hover{border-color:var(--accent);color:var(--accent)}.calc-back-to-top svg{width:18px;height:18px}.calc-content-wrapper{max-width:1200px;margin:48px auto 0;padding:0 24px}.calc-section{margin-bottom:48px}.calc-section__title{color:var(--text-primary);margin-bottom:20px;font-size:1.4rem;font-weight:700}.calc-howto-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}@media (width<=768px){.calc-howto-grid{grid-template-columns:1fr}}.calc-howto-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.calc-howto-card__number{color:var(--accent);margin-bottom:8px;font-size:1.8rem;font-weight:800}.calc-howto-card__title{margin-bottom:8px;font-weight:700}.calc-howto-card__body{color:var(--text-secondary);font-size:.87rem;line-height:1.5}.calc-formula-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;padding:18px}.calc-formula-box h3{margin-bottom:6px;font-size:.92rem;font-weight:700}.calc-formula-box__equation{color:var(--cyan);background:#00f3ff0f;border-radius:6px;margin:8px 0;padding:8px 14px;font-family:Courier New,monospace;font-size:.9rem}.calc-formula-box__description{color:var(--text-secondary);font-size:.84rem}.calc-glossary-item{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;grid-template-columns:140px 1fr;align-items:start;gap:12px;margin-bottom:8px;padding:14px;display:grid}@media 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var(--border);border-radius:var(--radius);padding:18px}.calc-example-card__number{color:var(--text-muted);text-transform:uppercase;letter-spacing:.07em;margin-bottom:6px;font-size:.72rem;font-weight:700}.calc-example-card__scenario{margin-bottom:6px;font-size:.95rem;font-weight:700}.calc-example-card__inputs{color:var(--text-secondary);margin-bottom:6px;font-size:.83rem}.calc-example-card__result{color:var(--accent);font-size:.84rem}.calc-comparison-table-wrapper{overflow-x:auto}.calc-comparison-table{border-collapse:collapse;width:100%;font-size:.87rem}.calc-comparison-table th{color:var(--accent);text-align:left;border-bottom:1px solid var(--border);background:#10b9811a;padding:10px 14px;font-weight:600}.calc-comparison-table td{color:var(--text-secondary);border-bottom:1px solid #ffffff0a;padding:9px 14px}.calc-related__grid{grid-template-columns:repeat(auto-fill,minmax(185px,1fr));gap:12px;display:grid}.calc-related__grid a{background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);border-radius:8px;padding:13px;font-size:.87rem;transition:all .2s;display:block}.calc-related__grid a:hover{border-color:var(--accent);color:var(--text-primary)}.calc-article h3{color:var(--text-primary);margin:20px 0 8px;font-size:1rem;font-weight:700}.calc-article p{color:var(--text-secondary);margin-bottom:12px;font-size:.87rem;line-height:1.6}@media (width<=768px){.main-container{padding:16px}.calc-title{font-size:1.5rem}.tab-btn{padding:8px 12px;font-size:.81rem}.hero-value{font-size:2rem}}[data-theme=light]{--bg-app:#f1f5f9;--bg-panel:#fff;--bg-card:#fff;--bg-input:#e2e8f0;--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#475569;--border:#0000001f;--border-subtle:#0000001f;--border-focus:#4f46e5;--bg-dark:#f1f5f9;--card-bg:#fff}[data-theme=light] body{color:#0f172a;background-color:#f1f5f9;background-image:none}[data-theme=light] input,[data-theme=light] select{color-scheme:light}[data-theme=light] .card{background:#fff;border-color:#0000001f;box-shadow:0 2px 8px #00000014}[data-theme=light] .tab-btn{color:#334155;background:#e2e8f0}[data-theme=light] .tab-btn.active{color:#fff}[data-theme=light] .stat-card{background:#fff;border-color:#0000001f}[data-theme=light] .stat-label{color:#475569}[data-theme=light] .stat-value{color:#0f172a}[data-theme=light] .formula-pill{color:#334155;background:#0000000f;border-color:#00000026}[data-theme=light] .formula-strip{background:#0000000a;border-color:#00000014}[data-theme=light] .alert-box,[data-theme=light] .alert-item{color:#334155;background:#0000000a;border-color:#0000001a}[data-theme=light] .how-to-card,[data-theme=light] .faq-item{color:#0f172a;background:#fff;border-color:#00000014}[data-theme=light] .faq-question{color:#0f172a}[data-theme=light] .faq-answer,[data-theme=light] .breadcrumb{color:#475569}[data-theme=light] .breadcrumb a:hover{color:#4f46e5}[data-theme=light] .toast-notification{color:#0f172a;background:#fff;border-color:#0000001f}[data-theme=light] .mobile-nav{background:#fffffffa}[data-theme=light] .mobile-nav .nav-link{color:#334155}[data-theme=light] .action-bar{background:#ffffffe6;border-color:#0000001f}[data-theme=light] .related-card{color:#334155;background:#fff;border-color:#0000001f}[data-theme=light] .glossary-card,[data-theme=light] .example-card{color:#0f172a;background:#fff;border-color:#00000014}[data-theme=light] .section-title{color:#0f172a}[data-theme=light] .data-table th{color:#0f172a;background:#0000000f;border-color:#0000001a}[data-theme=light] .data-table td{color:#334155;border-color:#00000014}[data-theme=light] .data-table tr:hover{background:#00000008}[data-theme=light] .shape-chip{color:#334155;background:#e2e8f0;border-color:#00000026}[data-theme=light] .hero-box{background:#fff;border-color:#0000001f}[data-theme=light] .result-label{color:#475569}