:root{--accent:var(--calc-color-environment);--bg-app:#050510;--bg-card:#0d0d1f;--bg-input:#111128;--text-primary:#fff;--text-secondary:#88a;--text-muted:#557;--green:#10b981;--cyan:#22d3ee;--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(--calc-text-muted);padding:10px 24px;font-size:.79rem}.calc-breadcrumb a{color:var(--text-secondary)}.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}.tab-nav{border-bottom:1px solid var(--calc-border-default);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:color .2s}.tab-btn:hover{color:var(--text-primary)}.tab-btn.active{color:var(--green);border-bottom-color:var(--green);font-weight:600}.tab-content{display:none}.tab-content.active{display:block}.calc-layout{grid-template-columns:420px 1fr;align-items:start;gap:24px;display:grid}@media (width<=1024px){.calc-layout{grid-template-columns:1fr}}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.input-card{background:#10b9810a;border-color:#10b98126}.result-card{background:var(--bg-card);border-color:var(--border)}.section-title{text-transform:uppercase;letter-spacing:.06em;color:var(--green);margin-bottom:14px;font-size:.85rem;font-weight:700}.form-group{margin-bottom:16px}.form-label{color:var(--text-secondary);margin-bottom:6px;font-size:.84rem;font-weight:600;display:block}.glass-input{background:var(--bg-input);border:1px solid var(--border);width:100%;color:var(--text-primary);border-radius:8px;outline:none;padding:10px 14px;font-family:inherit;font-size:.95rem;transition:border-color .2s}.glass-input:focus{border-color:#10b98180;box-shadow:0 0 0 3px #10b98114}select.glass-input{cursor:pointer}.input-note{color:var(--text-muted);margin-top:4px;font-size:.78rem}.preset-chips-row{margin-bottom:20px}.preset-chips{flex-wrap:wrap;gap:8px;display:flex}.preset-chip{color:var(--text-secondary);cursor:pointer;background:#ffffff0a;border:1px solid #ffffff1a;border-radius:20px;padding:6px 14px;font-family:inherit;font-size:.8rem;font-weight:600;transition:all .2s}.preset-chip:hover,.preset-chip.active{color:var(--green);background:#10b9811f;border-color:#10b98166}.hero-result{border-radius:var(--radius);text-align:center;background:linear-gradient(135deg,#10b98114,#10b98108);border:1px solid #10b98133;margin-bottom:16px;padding:20px}.hero-label{text-transform:uppercase;letter-spacing:.06em;color:var(--green);margin-bottom:8px;font-size:.8rem;font-weight:600}.hero-value{color:#fff;margin-bottom:6px;font-family:JetBrains Mono,monospace;font-size:2.8rem;font-weight:800;line-height:1}.hero-sub{color:var(--text-secondary);font-size:.8rem}.stat-grid{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px;display:grid}.stat-card{text-align:center;background:#ffffff08;border:1px solid #ffffff0f;border-radius:10px;padding:14px}.stat-label{color:var(--text-muted);margin-bottom:6px;font-size:.74rem}.stat-value{color:#fff;font-family:JetBrains Mono,monospace;font-size:1.3rem;font-weight:700}.equiv-strip{flex-wrap:wrap;gap:8px;margin-bottom:14px;display:flex}.equiv-chip{text-align:center;background:#10b9810f;border:1px solid #10b98126;border-radius:10px;flex:1;min-width:100px;padding:10px 14px}.equiv-num{color:var(--green);font-family:JetBrains Mono,monospace;font-size:1.2rem;font-weight:700;display:block}.equiv-label{color:var(--text-secondary);font-size:.72rem}.formula-strip{flex-wrap:wrap;gap:6px;margin-bottom:14px;display:flex}.formula-pill{color:#86efac;background:#10b9810f;border:1px solid #10b98126;border-radius:6px;padding:4px 10px;font-size:.75rem}.action-bar{flex-wrap:wrap;gap:8px;margin-top:16px;display:flex}.form-btn{color:var(--green);cursor:pointer;background:#10b9811a;border:1px solid #10b9814d;border-radius:8px;padding:8px 16px;font-family:inherit;font-size:.84rem;font-weight:600;transition:all .2s}.form-btn:hover{background:#10b9812e}.form-btn.secondary{color:var(--text-secondary);background:#ffffff0a;border-color:#ffffff1a}.form-btn.secondary:hover{color:var(--text-primary);background:#ffffff14}.method-row{border-bottom:1px solid #ffffff0d;justify-content:space-between;align-items:center;padding:8px 0;font-size:.84rem;display:flex}.method-row:last-child{border-bottom:none}.method-row-label{color:var(--text-secondary)}.method-row-value{color:#fff;font-weight:600}.method-row-value.positive{color:var(--green)}.method-row-value.negative{color:#f87171}.env-chart-wrap{background:#0003;border:1px solid #10b98126;border-radius:12px;margin:.8rem 0;padding:1.2rem}.env-interp-card{border-left:4px solid var(--green);background:#10b9810f;border-radius:0 10px 10px 0;padding:.9rem 1.1rem}.env-interp-title{color:var(--green);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.35rem;font-size:.85rem;font-weight:700}.env-interp-text{color:#ccc;font-size:.85rem;line-height:1.6}.env-offset-strip{flex-wrap:wrap;gap:.5rem;margin-top:.8rem;display:flex}.env-offset-chip{color:var(--green);white-space:nowrap;background:#10b98114;border:1px solid #10b98138;border-radius:20px;padding:.3rem .75rem;font-size:.82rem}.methane-row{border-bottom:1px solid #ffffff0d;justify-content:space-between;padding:10px 0;font-size:.84rem;display:flex}.methane-row:last-child{border-bottom:none}.data-table{border-collapse:collapse;width:100%;font-size:.86rem}.data-table th{text-align:left;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid #ffffff14;padding:8px 12px;font-size:.8rem;font-weight:600}.data-table td{color:var(--text-primary);border-bottom:1px solid #ffffff0a;padding:10px 12px}.data-table tr:hover td{background:#ffffff05}.table-scroll{overflow-x:auto}.payback-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}@media (width<=480px){.payback-grid{grid-template-columns:1fr}}.payback-item{background:#ffffff05;border:1px solid #ffffff0f;border-radius:10px;padding:14px}.payback-label{color:var(--text-muted);margin-bottom:4px;font-size:.78rem}.payback-value{color:var(--green);font-family:JetBrains Mono,monospace;font-size:1.4rem;font-weight:700}.page-sections-outer{max-width:1600px;margin:0 auto;padding:0 1.5rem 3rem}[data-theme=light]{--bg-app:#f1f5f9;--bg-card:#fff;--bg-input:#e8eef4;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#64748b;--green:#047857;--cyan:#0891b2;--amber:#b45309;--border:#0000001a}[data-theme=light] body{background:var(--bg-app)}[data-theme=light] .input-card{background:#0478570a;border-color:#0478572e}[data-theme=light] .card{background:#fff;border-color:#0000001a;box-shadow:0 2px 10px #0000000f}[data-theme=light] .glass-input{color:#0f172a;background:#e8eef4;border-color:#00000024}[data-theme=light] .glass-input:focus{border-color:#04785780;box-shadow:0 0 0 3px #0478571a}[data-theme=light] select.glass-input option{color:#0f172a;background:#fff}[data-theme=light] .preset-chip{color:#475569;background:#00000008;border-color:#0000001f}[data-theme=light] .preset-chip:hover,[data-theme=light] .preset-chip.active{color:#047857;background:#0478571a;border-color:#04785759}[data-theme=light] .hero-result{background:linear-gradient(135deg,#04785712,#04785708);border-color:#04785733}[data-theme=light] .hero-value{color:#0f172a}[data-theme=light] .stat-card{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .stat-value{color:#0f172a}[data-theme=light] .stat-label{color:#64748b}[data-theme=light] .equiv-chip{background:#0478570f;border-color:#0478572e}[data-theme=light] .equiv-num{color:#047857}[data-theme=light] .equiv-label{color:#475569}[data-theme=light] .formula-pill{color:#047857;background:#04785712;border-color:#04785733}[data-theme=light] .form-btn{color:#047857;background:#04785717;border-color:#0478574d}[data-theme=light] .form-btn:hover{background:#04785729}[data-theme=light] .form-btn.secondary{color:#475569;background:#0000000a;border-color:#0000001f}[data-theme=light] .form-btn.secondary:hover{color:#0f172a;background:#00000014}[data-theme=light] .method-row-label{color:#475569}[data-theme=light] .method-row-value{color:#0f172a}[data-theme=light] .method-row-value.positive{color:#047857}[data-theme=light] .env-chart-wrap{background:#00000005;border-color:#04785733}[data-theme=light] .env-interp-card{background:#0478570f;border-left-color:#047857}[data-theme=light] .env-interp-title{color:#047857}[data-theme=light] .env-interp-text{color:#334155}[data-theme=light] .env-offset-chip{color:#047857;background:#04785712;border-color:#04785733}[data-theme=light] .methane-row{border-bottom-color:#00000012}[data-theme=light] .data-table th{color:#475569;border-bottom-color:#0000001a}[data-theme=light] .data-table td{color:#0f172a;border-bottom-color:#0000000f}[data-theme=light] .data-table tr:hover td{background:#f0f4f9}[data-theme=light] .payback-item{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .payback-label{color:#64748b}[data-theme=light] .payback-value{color:#047857}[data-theme=light] .tab-btn{color:#475569}[data-theme=light] .tab-btn.active{color:#047857;border-bottom-color:#047857}[data-theme=light] .section-title{color:#047857}[data-theme=light] input::placeholder{color:#00000059}[data-theme=light] .calc-breadcrumb a{color:#475569}