:root{--bg: #f7f6f3;--bg-rail: #fbfaf7;--surface: #ffffff;--surface-2: #f1efe9;--ink: #15140f;--ink-2: #5a5852;--ink-3: #9a9890;--line: rgba(21, 20, 15, .1);--line-2: rgba(21, 20, 15, .18);--copper: #b5651d;--copper-2: #d4844a;--copper-soft: rgba(181, 101, 29, .1);--rail-bg: #15140f;--rail-ink: #e8e4d8;--rail-ink-2: #a09b8b;--rail-line: rgba(232, 228, 216, .1);--ok: #3d7a3d;--r: 3px;--density: 1}[data-theme=dark]{--bg: #15140f;--bg-rail: #1d1c16;--surface: #1d1c16;--surface-2: #27261e;--ink: #e8e4d8;--ink-2: #9a9890;--ink-3: #6a695f;--line: rgba(232, 228, 216, .08);--line-2: rgba(232, 228, 216, .16);--copper: #d4844a;--copper-2: #e8a06a;--copper-soft: rgba(212, 132, 74, .14);--rail-bg: #0e0d09;--rail-ink: #e8e4d8;--rail-ink-2: #7a7870;--rail-line: rgba(232, 228, 216, .08)}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--ink);font-family:Inter,system-ui,sans-serif;font-weight:400;-webkit-font-smoothing:antialiased;font-feature-settings:"cv11","ss01"}body{min-height:100vh}button{font-family:inherit;color:inherit;background:none;border:none;cursor:pointer}.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;border-bottom:1px solid var(--line);background:var(--surface);position:sticky;top:0;z-index:50}.topbar-left{display:flex;align-items:center;gap:20px}.topbar-left img{height:36px;width:auto;display:block}[data-theme=dark] .topbar-left img{filter:invert(.92) hue-rotate(180deg) brightness(1.05)}.topbar-title{font-size:13px;color:var(--ink-2);padding-left:14px;border-left:1px solid var(--line);display:flex;align-items:baseline;gap:8px}.topbar-title strong{font-family:Cormorant Garamond,serif;font-weight:500;color:var(--ink);font-size:17px;letter-spacing:.005em}.topbar-title em{font-style:italic;font-family:Cormorant Garamond,serif;color:var(--copper);font-size:15px;font-weight:500}.topbar-title .accent{width:6px;height:6px;border-radius:50%;background:var(--copper)}.topbar-actions{display:flex;align-items:center;gap:2px}.iconbtn{padding:6px 12px;font-size:12.5px;color:var(--ink-2);border-radius:var(--r);display:inline-flex;align-items:center;gap:6px;transition:background .12s,color .12s;font-family:Inter,sans-serif;letter-spacing:0;text-decoration:none}.iconbtn:hover{background:var(--surface-2);color:var(--ink)}.ribbon{display:flex;align-items:center;gap:0;padding:14px 20px;background:var(--bg-rail);border-bottom:1px solid var(--line);overflow-x:auto}.ribbon-step{display:flex;align-items:center;gap:10px;padding:6px 16px 6px 0;font-family:Inter,sans-serif;font-size:12.5px;color:var(--ink-3);position:relative;flex-shrink:0}.ribbon-step+.ribbon-step{padding-left:16px;border-left:1px solid var(--line)}.ribbon-step .n{font-family:Cormorant Garamond,serif;font-style:italic;font-size:13px;color:var(--ink-3);width:20px;height:20px;border:1px solid var(--line-2);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:500;line-height:1}.ribbon-step.done .n{background:var(--copper);color:#fff;border-color:var(--copper)}.ribbon-step.active .n{border-color:var(--copper);color:var(--copper)}.ribbon-step .lbl{font-weight:500;letter-spacing:.005em;color:var(--ink-2)}.ribbon-step.done .lbl,.ribbon-step.active .lbl{color:var(--ink)}.ribbon-step .val{color:var(--ink-3);font-family:JetBrains Mono,monospace;font-size:11.5px;letter-spacing:.02em}.ribbon-step.done .val{color:var(--copper)}.shell{display:grid;grid-template-columns:1fr 460px;min-height:calc(100vh - 113px)}.pane{padding:24px 28px;overflow-y:auto}.rail{background:var(--rail-bg);color:var(--rail-ink);border-left:1px solid var(--line);position:sticky;top:113px;height:calc(100vh - 113px);display:flex;flex-direction:column}.section{margin-bottom:36px}.section.disabled{opacity:.35;pointer-events:none}.section-head{display:flex;align-items:baseline;gap:14px;margin-bottom:14px;flex-wrap:wrap}.section-head .num{font-family:Cormorant Garamond,serif;font-style:italic;font-size:20px;color:var(--copper);line-height:1;font-weight:500;flex-shrink:0;white-space:nowrap;display:inline-flex;align-items:center;gap:10px}.section-head .num:before{content:"";display:inline-block;width:18px;height:1px;background:var(--copper);flex-shrink:0}.section-head h2{font-family:Cormorant Garamond,serif;font-size:22px;font-weight:500;color:var(--ink);letter-spacing:-.005em;line-height:1.1;flex-shrink:1;min-width:0}.section-head .aside{font-family:Inter,sans-serif;font-size:11.5px;color:var(--ink-3);font-style:italic;margin-left:auto;letter-spacing:0;flex-shrink:0}.section-head .aside em{font-style:normal;color:var(--copper);font-weight:500}.section-hint{font-size:13.5px;line-height:1.6;color:var(--ink-2);margin-bottom:16px;max-width:64ch}.section-hint code{font-family:JetBrains Mono,monospace;font-size:11.5px;color:var(--copper);background:var(--copper-soft);padding:1px 5px;border-radius:2px}.family-row{display:flex;gap:10px;align-items:center;max-width:560px}.family-row select{flex:1;padding:9px 32px 9px 12px;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);font-family:Inter,sans-serif;font-size:13px;color:var(--ink);appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23b5651d' stroke-width='1.4' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}.family-row select:focus,.family-row select:hover{outline:none;border-color:var(--copper)}.family-meta{font-family:Inter,sans-serif;font-size:12px;color:var(--ink-3);font-style:italic;letter-spacing:0}.family-meta strong{font-family:JetBrains Mono,monospace;font-style:normal;font-size:11.5px;letter-spacing:.02em;color:var(--copper);font-weight:500}.tokens{display:flex;flex-wrap:wrap;gap:6px}.token{display:inline-flex;align-items:center;gap:8px;padding:6px 10px 6px 8px;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);cursor:pointer;font-family:JetBrains Mono,monospace;font-size:12px;color:var(--ink);transition:all .12s}.token:hover{border-color:var(--copper-2);background:var(--surface-2)}.token.on{border-color:var(--copper);background:var(--copper-soft);color:var(--copper)}.token .check{width:11px;height:11px;border:1px solid var(--line-2);border-radius:2px;flex-shrink:0;position:relative}.token.on .check{background:var(--copper);border-color:var(--copper)}.token.on .check:after{content:"";position:absolute;left:2px;top:1px;width:5px;height:3px;border-left:1.4px solid #fff;border-bottom:1.4px solid #fff;transform:rotate(-45deg)}.token .b-label{font-family:Inter,sans-serif;color:var(--ink-2);font-size:12px;font-weight:400}.token.on .b-label{color:var(--ink)}.token .b-code{font-weight:500}.finish-row{display:flex;flex-wrap:wrap;gap:8px}.finish-chip{display:inline-flex;align-items:center;gap:10px;padding:10px 14px 10px 10px;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);cursor:pointer;transition:all .12s;min-width:170px}.finish-chip:hover{border-color:var(--copper-2)}.finish-chip.on{border-color:var(--copper);background:var(--copper-soft)}.finish-swatch{width:24px;height:24px;border-radius:50%;flex-shrink:0;box-shadow:inset 0 0 0 1px #0000001a;background-image:radial-gradient(circle at 30% 30%,rgba(255,255,255,.35),transparent 60%)}.finish-meta{display:flex;flex-direction:column;gap:1px}.finish-name{font-size:12.5px;font-weight:500;color:var(--ink);line-height:1.1}.finish-code{font-family:JetBrains Mono,monospace;font-size:10.5px;color:var(--ink-3);letter-spacing:.04em}.finish-chip.on .finish-code{color:var(--copper)}.finish-default{font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-left:auto}.brass-note{padding:12px 14px;background:var(--surface);border:1px solid var(--line-2);border-left:2px solid var(--copper);font-size:12.5px;color:var(--ink-2);line-height:1.55;max-width:600px;border-radius:0 var(--r) var(--r) 0}.brass-note strong{color:var(--ink);font-weight:600}.acc-group{margin-bottom:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px 16px}.acc-group-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}.acc-group-head .dot{width:6px;height:6px;border-radius:50%}.acc-group-head .gtitle{font-family:Cormorant Garamond,serif;font-size:18px;font-weight:500;color:var(--ink);letter-spacing:.005em;white-space:nowrap}.acc-group-head .gcount{font-family:JetBrains Mono,monospace;font-size:10.5px;color:var(--ink-3);letter-spacing:.04em;margin-right:auto}.dot-wall{background:#3a6b3a}.dot-ceil{background:#3a3d7a}.dot-post{background:#7a4a2a}.dot-bilt{background:#6a3a7a}.dot-dec{background:#a0734a}.dot-parts{background:#888}.dot-gas{background:#7a5a2a}.dot-electric{background:#3a3d7a}.acc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:5px}.acc-item{display:flex;flex-direction:column;align-items:flex-start;gap:3px;padding:8px 10px;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r);cursor:pointer;transition:all .12s;font-family:Inter,sans-serif;text-align:left;position:relative}.acc-item:hover{border-color:var(--copper-2);background:var(--surface)}.acc-item.on{border-color:var(--copper);background:var(--copper-soft)}.acc-item.on:after{content:"✓";position:absolute;top:4px;right:6px;font-size:10px;color:var(--copper);font-weight:700;font-family:JetBrains Mono,monospace}.acc-item .a-label{font-size:11.5px;color:var(--ink);line-height:1.3;padding-right:14px}.acc-item.on .a-label{font-weight:500}.acc-item .a-code{font-family:JetBrains Mono,monospace;font-size:10px;color:var(--copper);background:#b5651d1a;padding:1px 5px;border-radius:2px;letter-spacing:.04em}.biltmore-banner{margin-bottom:14px;padding:10px 14px;background:#6a3a7a12;border:1px solid rgba(106,58,122,.22);border-left:2px solid #6a3a7a;font-size:12px;color:var(--ink-2);line-height:1.55;max-width:680px;border-radius:0 var(--r) var(--r) 0}.biltmore-banner strong{color:#6a3a7a;font-weight:600;letter-spacing:.02em}[data-theme=dark] .biltmore-banner strong{color:#c8a3d6}.rail-head{padding:18px 20px 14px;border-bottom:1px solid var(--rail-line)}.rail-label{font-family:Inter,sans-serif;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--rail-ink-2);margin-bottom:8px;display:flex;justify-content:space-between;font-weight:500}.rail-count{font-family:Cormorant Garamond,serif;font-size:48px;font-weight:500;color:var(--copper);line-height:1;letter-spacing:-.01em}.rail-count-sub{margin-left:10px;font-family:Inter,sans-serif;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--rail-ink-2);font-weight:500}.rail-path{margin-top:12px;font-size:12px;line-height:1.55;color:var(--rail-ink-2);font-style:italic}.rail-path code{font-family:JetBrains Mono,monospace;font-size:10.5px;color:var(--copper-2);background:#d4844a1a;padding:1px 5px;border-radius:2px;font-style:normal}.rail-controls{padding:10px 20px;border-bottom:1px solid var(--rail-line);display:flex;gap:6px;align-items:center;background:#00000026}[data-theme=dark] .rail-controls{background:#ffffff05}.rail-controls .search{flex:1;position:relative}.rail-controls .search input{width:100%;padding:6px 10px 6px 26px;background:#e8e4d80f;border:1px solid var(--rail-line);border-radius:var(--r);font-size:12px;color:var(--rail-ink);font-family:JetBrains Mono,monospace}.rail-controls .search input::placeholder{color:var(--rail-ink-2)}.rail-controls .search input:focus{outline:none;border-color:var(--copper)}.rail-controls .search:before{content:"⌕";position:absolute;left:8px;top:50%;transform:translateY(-50%);font-size:13px;color:var(--rail-ink-2)}.rail-controls select{padding:6px 22px 6px 10px;background:#e8e4d80f;border:1px solid var(--rail-line);border-radius:var(--r);font-size:12px;color:var(--rail-ink);font-family:Inter,sans-serif;letter-spacing:0;appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23d4844a' stroke-width='1.4' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center}.rail-list{flex:1;overflow-y:auto;padding:6px 0;min-height:0;font-family:JetBrains Mono,monospace}.rail-empty{padding:32px 20px;text-align:center;font-size:12.5px;color:var(--rail-ink-2);font-family:Cormorant Garamond,serif;font-style:italic;letter-spacing:0}.sku-row{display:flex;align-items:center;gap:8px;padding:5px 20px;border-bottom:1px solid var(--rail-line);transition:background .12s}.sku-row:hover{background:#e8e4d80a}.sku-row-num{font-size:9.5px;color:var(--rail-ink-2);min-width:30px;text-align:right}.sku-row-num:before{content:"#";opacity:.55}.sku-row-val{flex:1;font-size:11.5px;color:var(--copper-2);letter-spacing:.02em;word-break:break-all;line-height:1.4}.sku-row-val mark{background:#d4844a47;color:var(--rail-ink);padding:0 2px;border-radius:1px}.sku-row-copy{padding:3px 6px;border-radius:2px;color:var(--rail-ink-2);font-size:11px;opacity:0;transition:opacity .12s,background .12s,color .12s;font-family:JetBrains Mono,monospace}.sku-row:hover .sku-row-copy{opacity:1}.sku-row-copy:hover{background:#e8e4d81a;color:var(--rail-ink)}.sku-row-copy.ok{color:#9ad29a;opacity:1}.rail-foot{padding:12px 20px 16px;border-top:1px solid var(--rail-line);display:grid;gap:6px;background:#00000026}[data-theme=dark] .rail-foot{background:#ffffff05}.rf-row{display:grid;grid-template-columns:1fr 1fr;gap:6px}.btn{padding:9px 12px;font-family:Inter,sans-serif;font-size:12.5px;letter-spacing:.01em;border-radius:var(--r);font-weight:500;transition:all .12s;border:1px solid transparent;display:flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:var(--copper);color:#fff}.btn-primary:hover{background:var(--copper-2)}.btn-primary:disabled{background:#e8e4d814;color:var(--rail-ink-2);cursor:not-allowed}.btn-primary.ok{background:#3d7a3d}.btn-ghost{background:transparent;color:var(--copper-2);border-color:#d4844a52}.btn-ghost:hover{background:var(--copper-soft)}.btn-ghost:disabled{color:var(--rail-ink-2);border-color:var(--rail-line);cursor:not-allowed}.btn-text{font-family:Inter,sans-serif;font-size:11.5px;color:var(--rail-ink-2);padding:6px;letter-spacing:.01em;text-align:center;font-style:italic}.btn-text:hover{color:var(--copper-2)}.rail-contact{display:block;margin-top:4px;padding:8px 6px 2px;text-align:center;font-family:Cormorant Garamond,serif;font-style:italic;font-size:12.5px;color:var(--rail-ink-2);text-decoration:none;border-top:1px solid var(--rail-line);transition:color .12s}.rail-contact span{font-family:JetBrains Mono,monospace;font-style:normal;font-size:11px;color:var(--copper-2);letter-spacing:.01em;margin-left:4px}.rail-contact:hover{color:var(--rail-ink)}.empty-notice{padding:13px 16px;background:var(--surface);border:1px dashed var(--line-2);border-radius:var(--r);font-size:13px;color:var(--ink-3);font-style:italic;max-width:600px}.toast{position:fixed;bottom:18px;left:50%;transform:translate(-50%) translateY(20px);padding:9px 20px;background:var(--ink);color:var(--bg);border-radius:99px;font-family:Inter,sans-serif;font-size:12.5px;letter-spacing:.01em;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none;z-index:100}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}@media(max-width:1100px){.shell{grid-template-columns:1fr}.rail{position:relative;height:auto;top:auto;border-left:none;border-top:1px solid var(--line)}}@media(max-width:720px){.pane{padding:18px}.ribbon{padding:10px 18px}}