:root{--navy:#102a43;--blue:#176b87;--teal:#0b8f87;--green:#23855b;--orange:#d97706;--red:#c53b3b;--ink:#243b53;--muted:#627d98;--line:#d9e2ec;--soft:#f4f8fa;--white:#fff;--shadow:0 8px 28px rgba(16,42,67,.08)}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--ink);background:#edf3f6;line-height:1.5}.topbar{height:82px;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 32px;position:sticky;top:0;z-index:5}.topbar h1{font-size:23px;margin:0}.eyebrow,.step-label{font-size:11px;letter-spacing:.13em;font-weight:800;margin:0 0 2px;color:#6fb7c5}.status-pill{background:#183b56;border:1px solid #2f5b76;border-radius:22px;padding:8px 13px;font-size:13px}.status-pill span{display:inline-block;width:8px;height:8px;background:#55d6be;border-radius:50%;margin-right:7px}.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:calc(100vh - 82px)}.sidebar{background:#fff;border-right:1px solid var(--line);padding:20px 14px}.scope-note{background:#e9f6f5;border-left:3px solid var(--teal);font-size:12px;padding:12px;margin:0 6px 17px}.nav-item{width:100%;display:flex;gap:12px;align-items:center;border:0;background:transparent;color:var(--ink);padding:10px 12px;text-align:left;border-radius:7px;cursor:pointer}.nav-item:hover,.nav-item.active{background:#eaf3f7;color:#075d7a}.nav-item.active{box-shadow:inset 3px 0 var(--blue)}.nav-item b{width:22px;height:22px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font-size:11px;flex:none}.nav-item span{font-size:13px;font-weight:700}.nav-item small{display:block;font-size:10px;color:var(--muted);font-weight:500}.nav-item.locked{opacity:.6}.nav-divider{font-size:9px;letter-spacing:.12em;color:#829ab1;font-weight:800;margin:20px 12px 7px}.workspace{padding:36px;max-width:1250px;width:100%;margin:0 auto}.page{display:none}.page.active{display:block}.page-heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;margin-bottom:23px}.page-heading h2{font-size:30px;color:var(--navy);margin:2px 0 3px}.page-heading p{margin:0;color:var(--muted)}.badge,.tag{display:inline-block;border-radius:4px;background:#e9f2f6;color:#27647b;font-size:10px;font-weight:800;letter-spacing:.06em;padding:6px 9px;white-space:nowrap}.tag{margin-top:7px;padding:4px 7px}.tag.assumption{background:#fff3dc;color:#8a5700}.tag.calculated{background:#e7f5ee;color:#1c6f4c}.tag.methodology,.badge.methodology{background:#eeeafd;color:#5b4ab0}.notice{border-radius:7px;padding:15px 17px;margin:18px 0;background:#eef5f8;border-left:4px solid var(--blue)}.notice strong{text-transform:uppercase;font-size:12px;letter-spacing:.05em}.notice p{margin:3px 0 0;color:#526b7a;font-size:13px}.notice.tip{background:#eaf8f1;border-color:var(--green)}.notice.warning{background:#fff7e8;border-color:var(--orange)}.notice.neutral{background:#f3f5f7;border-color:#829ab1}.notice.pending-match{background:#eef0fa;border-color:#6658b1}.workflow-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:24px 0}.workflow-card,.card,.form-section{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px;box-shadow:var(--shadow)}.workflow-card span{font-size:11px;color:var(--teal);font-weight:800}.workflow-card h3{font-size:15px;margin:8px 0 4px;color:var(--navy)}.workflow-card p{font-size:12px;color:var(--muted);margin:0}.primary,.secondary{border:0;border-radius:6px;padding:11px 17px;font-weight:700;cursor:pointer}.primary{background:var(--blue);color:#fff}.secondary{background:#fff;color:var(--blue);border:1px solid #9fb9c5}.segmented{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}.segmented input{position:absolute;opacity:0}.segmented span{display:block;background:#fff;border:2px solid var(--line);border-radius:8px;padding:15px;font-weight:700;cursor:pointer}.segmented small{display:block;color:var(--muted);font-weight:400}.segmented input:checked+span{border-color:var(--teal);background:#effaf8;box-shadow:0 0 0 2px rgba(11,143,135,.08)}.card{margin:15px 0}.card-title{display:flex;justify-content:space-between;align-items:start;margin-bottom:14px}.card-title h3,.form-section h3{margin:0;color:var(--navy);font-size:17px}.card-title p,.proposed>p{margin:3px 0;color:var(--muted);font-size:12px}.month-grid,.input-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.input-grid.two{grid-template-columns:repeat(2,1fr)}.input-grid.three{grid-template-columns:repeat(3,1fr)}.field{display:flex;flex-direction:column;gap:5px}.field>span{font-size:12px;font-weight:700}.field em{font-style:normal;color:var(--muted);font-weight:500}.field input,.field textarea{border:1px solid #bcccdc;border-radius:5px;padding:10px;background:#fbfdfe;color:var(--ink);font:inherit;width:100%}.field input:focus,.field textarea:focus{outline:2px solid rgba(23,107,135,.2);border-color:var(--blue)}.field small{font-size:10px;color:var(--muted)}.field.compact{max-width:260px}.field.readonly strong{font-size:25px;color:var(--navy)}.result-row,.comparison-grid{display:grid;gap:12px;margin:16px 0}.result-row.three{grid-template-columns:repeat(3,1fr)}.result-row.four,.comparison-grid{grid-template-columns:repeat(4,1fr)}.metric{background:#fff;border:1px solid var(--line);border-radius:7px;padding:17px}.metric.accent{border-top:3px solid var(--teal)}.metric span{display:block;text-transform:uppercase;color:var(--muted);font-weight:700;font-size:10px;letter-spacing:.05em}.metric strong{display:block;color:var(--navy);font-size:25px;margin-top:5px}.metric small{font-size:11px;color:var(--muted)}.explain{background:#fff;border:1px solid var(--line);border-radius:7px;margin:10px 0}.explain summary{padding:13px 16px;cursor:pointer;font-size:12px;text-transform:uppercase;letter-spacing:.04em;font-weight:800;color:#345c70}.explain[open] summary{border-bottom:1px solid var(--line)}.explain>p,.calc-body,.source-list,.series-parallel{padding:15px 18px;margin:0;font-size:13px}.calc-body{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:15px}.calc-body p{margin:0}.calc-body b{font-size:11px;text-transform:uppercase;color:var(--muted)}.source-list p{display:flex;justify-content:space-between;border-bottom:1px solid #edf2f5;padding:8px 0;margin:0}.source-list span{font-size:10px;font-weight:800;color:var(--muted)}.page-actions{display:flex;justify-content:space-between;margin-top:24px}.hero-result{background:linear-gradient(120deg,#0d647b,#0b8f87);color:#fff;border-radius:8px;padding:24px;text-align:center;margin:17px 0}.hero-result>span{display:block;text-transform:uppercase;font-size:11px;letter-spacing:.1em}.hero-result strong{font-size:48px}.hero-result small{font-size:15px}.form-section{margin:14px 0}.form-section h3 small{font-weight:400;color:var(--muted);font-size:11px}.source-confirm{display:flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--line);padding:13px;border-radius:7px;font-size:13px}.array-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.array-summary div{padding:12px;background:var(--soft);border-radius:5px}.array-summary span,.array-summary small{display:block;font-size:10px;color:var(--muted);text-transform:uppercase}.array-summary strong{font-size:17px}.configuration-inputs{display:flex;align-items:end;gap:15px;margin-top:16px}.configuration-inputs .field{max-width:220px}.operator{font-size:25px;padding-bottom:7px;color:var(--muted)}.config-total{padding:5px 0}.config-total strong{display:block;font-size:24px}.config-total small{color:var(--muted)}.config-status{margin-top:15px;padding:12px;border-radius:5px;font-size:12px;font-weight:800}.config-status.pending{background:#eef2f5;color:#627d98}.config-status.pass{background:#e5f7ed;color:#18714b}.config-status.fail{background:#fdeaea;color:#a72727}.series-parallel{display:flex;gap:35px;border-top:1px solid var(--line)}.hidden{display:none!important}.empty-state{text-align:center;background:#fff;border:1px solid var(--line);padding:70px 25px;border-radius:9px}.empty-state span{color:var(--orange);font-weight:800;font-size:11px;letter-spacing:.1em}.empty-state h2{color:var(--navy)}.empty-state p{color:var(--muted)}.muted{color:var(--muted)}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{position:static;border-right:0;border-bottom:1px solid var(--line);overflow:auto}.scope-note,.nav-divider,.nav-item small{display:none}#mainNav{display:flex;min-width:800px}.nav-item{width:auto}.workspace{padding:22px}.workflow-grid{grid-template-columns:repeat(2,1fr)}.month-grid,.input-grid,.input-grid.five,.result-row.four,.comparison-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.topbar{padding:0 16px}.status-pill{display:none}.workspace{padding:15px}.page-heading{display:block}.badge{margin-top:10px}.workflow-grid,.month-grid,.input-grid,.input-grid.two,.input-grid.three,.result-row.three,.result-row.four,.comparison-grid,.array-summary{grid-template-columns:1fr}.segmented{grid-template-columns:1fr}.configuration-inputs{flex-wrap:wrap}.page-actions{gap:10px}.hero-result strong{font-size:38px}}