:root{--bg:#f4f7f7;--panel:#fff;--line:#dce5e5;--text:#1d2c2f;--muted:#6a7d80;--brand:#0d777a;--brand2:#0b6467;--green:#2f8f68;--yellow:#b98212;--red:#b94242;--blue:#2d6ca3;--shadow:0 12px 32px rgba(33,61,65,.07);font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.app-shell{min-height:100vh;display:flex}.sidebar{position:fixed;inset:0 auto 0 0;width:230px;background:#10292c;color:#d8e5e5;padding:18px 14px;display:flex;flex-direction:column;z-index:30}.brand{display:flex;align-items:center;gap:10px;padding:5px 7px 20px}.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(145deg,#18a1a5,#0a6669);display:grid;place-items:center;font-weight:800;color:#fff;box-shadow:0 8px 18px rgba(0,0,0,.2)}.brand strong,.brand small{display:block}.brand small{font-size:10px;color:#88a8aa;letter-spacing:1px;margin-top:3px}.sidebar nav{display:grid;gap:5px}.nav-item{padding:12px 13px;border-radius:11px;color:#a8bec0;display:flex;gap:12px;align-items:center;font-size:14px}.nav-item:hover,.nav-item.active{background:#18383b;color:#fff}.sidebar-foot{margin-top:auto;border-top:1px solid #28474a;padding:14px 8px 2px;display:flex;justify-content:space-between;align-items:end}.sidebar-foot b,.sidebar-foot small{display:block}.sidebar-foot small{color:#89a6a8;font-size:11px;margin-top:3px}.sidebar-foot a{font-size:12px;color:#a9bdbf}.main{margin-left:230px;min-width:0;width:calc(100% - 230px)}.topbar{height:62px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 22px;position:sticky;top:0;z-index:20}.topbar b,.topbar small{display:block}.topbar small{font-size:10px;color:var(--muted);margin-top:2px}.top-actions{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.safety-dot{width:8px;height:8px;border-radius:50%;background:var(--green)}.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#e7f2f2;color:var(--brand);font-weight:700}.content{padding:22px;max-width:1600px;margin:auto}.page-head,.workspace-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;margin-bottom:18px}.page-head h1,.workspace-head h1{margin:4px 0 6px;font-size:26px;letter-spacing:-.6px}.page-head p{margin:0;color:var(--muted);font-size:13px}.eyebrow{font-size:10px;letter-spacing:1.5px;color:var(--brand);font-weight:800}.btn,.mini-btn,.tool{border:1px solid transparent;border-radius:9px;padding:10px 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span{font-size:12px;color:var(--muted);margin-top:3px}.project-meta{display:flex;gap:3px;flex-wrap:wrap;margin:8px 0}.project-progress{height:5px;background:#ecf1f1;border-radius:999px;overflow:hidden}.project-progress i,.progress i{display:block;height:100%;background:var(--brand);border-radius:999px}.project-card small{display:block;margin-top:7px;color:var(--muted)}.skill-list{display:grid;gap:9px}.skill-list>div{display:grid;grid-template-columns:95px 1fr 42px;align-items:center;gap:8px;font-size:12px}.progress{height:7px;background:#e8eeee;border-radius:999px;overflow:hidden}.form-stack{display:grid;gap:12px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.form-stack label,.form-grid label{display:grid;gap:6px;font-size:12px;font-weight:650}.form-stack input,.form-stack select,.form-stack textarea,.form-grid input,.form-grid textarea,.form-grid select,.compact-form input,.compact-form select,.boq-row input,.upload-line select,.upload-line input,.review-comment,.check-form textarea{border:1px solid #ccd9da;border-radius:8px;padding:9px 10px;background:#fff;color:var(--text);outline:none}.form-stack textarea,.form-grid textarea,.review-comment{min-height:78px;resize:vertical}.form-stack input:focus,.form-stack textarea:focus,.form-grid input:focus,.form-grid textarea:focus,.boq-row input:focus{border-color:#69aeb0;box-shadow:0 0 0 3px rgba(13,119,122,.08)}.difficulty-cards,.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.difficulty-cards span,.feature{border:1px solid var(--line);border-radius:10px;padding:11px;background:#fafcfc}.difficulty-cards b,.feature b,.feature span{display:block}.feature span,.difficulty-cards span{font-size:11px;color:var(--muted)}.feature b{color:var(--text);font-size:12px;margin-bottom:4px}.blueprint-preview{min-height:320px;position:relative;overflow:hidden;background:#f9fcfc}.bp-grid{position:absolute;inset:28px;background-image:linear-gradient(#d4e0e0 1px,transparent 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small{display:block}.doc-checklist small{font-size:10px;color:var(--muted);margin-top:2px}.doc-checklist .btn{margin-top:5px}.upload-line{display:grid;grid-template-columns:150px 1fr auto;gap:8px}.file-list{display:grid;gap:6px;margin-top:10px}.file-list a{border:1px solid var(--line);border-radius:8px;padding:8px;font-size:11px}.file-list a b{font-size:9px;color:var(--red);margin-right:6px}.file-list small{display:block;color:var(--muted);margin-top:3px}.history-note{background:#f4f8f8;border-radius:8px;padding:9px;margin-top:10px;font-size:11px;color:var(--muted)}.drawing-toolbar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}.tool{padding:8px 10px;font-size:11px}.tool.active{background:#e4f2f2;border-color:#87babc;color:var(--brand)}.drawing-shell{background:#e9eeee;border:1px solid var(--line);border-radius:12px;overflow:hidden}.drawing-shell svg,.drawing-shell canvas{display:block;width:100%;height:auto;background:#fff}.grid-label,.obj-label,.titleblock{font:12px 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textarea{min-height:70px}.timeline{display:grid}.timeline-item{display:grid;grid-template-columns:15px 1fr;gap:7px;padding:7px 0}.timeline-item>i{width:8px;height:8px;border-radius:50%;background:#7fa5a7;margin-top:5px;position:relative}.timeline-item>i:after{content:"";position:absolute;width:1px;background:#d7e2e2;left:3px;top:10px;height:100%}.timeline-item:last-child>i:after{display:none}.timeline-item b{font-size:10px}.timeline-item em{font-style:normal;color:var(--brand);float:right}.timeline-item p{font-size:10px;color:#53676a;line-height:1.4;margin:2px 0}.timeline-item small{font-size:9px;color:#89989a}.timeline-item.critical>i{background:var(--red)}.timeline-item.critical b{color:var(--red)}.review-list{display:grid;gap:9px}.review-card{border:1px solid var(--line);border-radius:10px;padding:11px}.review-card p{font-size:11px;line-height:1.5}.review-card small{display:block;color:var(--muted);font-size:9px}.review-comment{width:100%;min-height:58px}.compact-form{display:grid;grid-template-columns:1fr 1fr 1fr 120px auto;gap:6px;margin-bottom:12px}.hidden{display:none!important}.report-paper{background:#fff;max-width:1000px;margin:auto;padding:50px;box-shadow:var(--shadow);position:relative;overflow:hidden}.report-watermark{position:absolute;top:45%;left:16%;font-size:48px;color:rgba(174,45,45,.08);transform:rotate(-25deg);font-weight:800}.report-title{text-align:center;border-bottom:2px solid #2b4447;padding-bottom:18px}.report-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:24px 0}.report-summary div,.score-grid div{border:1px solid var(--line);padding:12px;text-align:center}.report-summary span,.score-grid span{display:block;color:var(--muted);font-size:10px}.report-summary b{font-size:23px}.score-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.report-paper h2{font-size:15px;margin-top:25px}.login-page{min-height:100vh;background:#eef4f4;display:grid;place-items:center;padding:20px}.login-grid{width:min(1080px,100%);display:grid;grid-template-columns:1.25fr .75fr;background:#fff;border-radius:20px;overflow:hidden;box-shadow:0 25px 70px rgba(27,62,65,.14)}.login-hero{background:#10292c;color:#e7f3f3;padding:54px}.login-hero h1{font-size:42px;line-height:1.16;letter-spacing:-1.5px;margin:14px 0}.login-hero p{color:#a9c0c2;line-height:1.7;max-width:600px}.risk-legend{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:#bfd0d1;margin:24px 0}.risk-legend span{display:flex;align-items:center;gap:5px}.risk-legend i{width:8px;height:8px;border-radius:50%}.risk-legend .g{background:#48a97f}.risk-legend .y{background:#d9a42a}.risk-legend .r{background:#d45a5a}.watermark-card{border:1px solid #315256;border-radius:12px;padding:18px;text-align:center;color:#799b9d;letter-spacing:2px}.watermark-card b,.watermark-card small{display:block}.watermark-card b{font-size:22px;color:#b06d6d;margin:4px}.watermark-card small{letter-spacing:0;font-size:10px}.login-card{padding:44px}.login-card h2{margin-top:26px}.demo-accounts{display:grid;gap:5px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}.demo-accounts b{font-size:11px}.demo-accounts code{font-size:11px;background:#f3f6f6;padding:6px;border-radius:6px}.login-brand{padding:0}.toast{position:fixed;right:20px;bottom:20px;max-width:420px;background:#17383b;color:#fff;padding:12px 15px;border-radius:10px;box-shadow:0 15px 35px rgba(0,0,0,.2);transform:translateY(20px);opacity:0;pointer-events:none;transition:.2s;z-index:100;font-size:12px}.toast.show{transform:none;opacity:1}.toast.warn{background:#8a6516}.toast.bad{background:#9f3333}.mobile-only{display:none}.icon-btn{border:0;background:transparent;font-size:20px}.no-print{}
@media(max-width:1180px){.workspace-grid{grid-template-columns:190px minmax(0,1fr)}.right-rail{grid-column:1/-1}.right-rail .sticky{position:static;max-height:none}.case-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:.2s}.sidebar.open{transform:none}.main{margin-left:0;width:100%}.mobile-only{display:block}.content{padding:14px}.metric-grid{grid-template-columns:1fr 1fr}.grid-2{grid-template-columns:1fr}.case-grid{grid-template-columns:1fr 1fr}.workspace-grid{grid-template-columns:1fr}.step-panel{position:static}.stage-strip{overflow:auto;grid-template-columns:repeat(8,95px)}.form-grid{grid-template-columns:1fr}.compact-form{grid-template-columns:1fr 1fr}.login-grid{grid-template-columns:1fr}.login-hero{display:none}.login-card{padding:30px}.score-grid{grid-template-columns:1fr 1fr 1fr}.report-paper{padding:25px}}
@media(max-width:560px){.metric-grid{grid-template-columns:1fr 1fr;gap:8px}.metric{padding:12px}.metric strong{font-size:22px}.case-grid{grid-template-columns:1fr}.feature-grid,.difficulty-cards{grid-template-columns:1fr}.page-head,.workspace-head{flex-direction:column}.score-box{width:100%;display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center}.score-box b{font-size:24px}.upload-line{grid-template-columns:1fr}.boq-head{display:none}.boq-row{grid-template-columns:1fr 1fr}.boq-row .remove-row{grid-column:2}.compact-form{grid-template-columns:1fr}.report-summary{grid-template-columns:1fr 1fr}.score-grid{grid-template-columns:1fr 1fr}.topbar{padding:0 12px}.topbar>div:nth-child(2) small{display:none}}
@media print{.sidebar,.topbar,.no-print,.toast{display:none!important}.main{margin:0;width:100%}.content{padding:0}.report-paper{box-shadow:none;max-width:none;padding:20px}}
/* V4 operational extensions */
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.course-card{display:flex;flex-direction:column;gap:10px}.course-card h3{margin:0}.course-body{padding:12px;border:1px solid var(--line);background:#f8fbfb;border-radius:12px;color:var(--muted);font-size:13px;line-height:1.65}.course-card .btn{margin-top:auto}.narrow{max-width:620px}.form-grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.case-admin-list{display:grid;gap:8px;max-height:520px;overflow:auto}.case-admin-list a{display:grid;grid-template-columns:70px 1fr auto;gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:inherit;background:#fff}.case-admin-list a:hover{border-color:#8bb9bb;background:#f7fbfb}.case-admin-list small{color:var(--muted)}.zone-canvas-wrap{min-width:0}.zone-canvas-wrap svg{width:100%;border:1px solid var(--line);border-radius:14px;background:white}.zone-grid line{stroke:#d5e0e1;stroke-width:1}.zone-rect{stroke-width:2}.zone-rect.no_drill{fill:rgba(190,45,45,.18);stroke:#b52b2b}.zone-rect.review{fill:rgba(215,154,29,.2);stroke:#bf8518}.zone-rect.approved{fill:rgba(36,145,104,.18);stroke:#238d66}.zone-label{font-size:12px;font-weight:800;fill:#314b50}.zone-list{display:grid;gap:8px}.zone-list>div{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px;border:1px solid var(--line);border-radius:10px}.class-list{display:grid;gap:10px;margin-top:14px}.class-card{border:1px solid var(--line);border-radius:12px;padding:12px;display:grid;gap:8px}.class-card>small{color:var(--muted)}.class-tools{display:grid;grid-template-columns:1fr auto;gap:8px}.class-tools:has(.class-due){grid-template-columns:1fr 150px auto}.switch-line{display:flex!important;align-items:center!important;gap:10px!important}.switch-line input{width:auto!important}.drawing-version-panel{margin-bottom:10px}.version-row{display:flex;gap:8px}.version-row select{flex:1}.admin-inline{margin-top:10px;border-top:1px solid var(--line);padding-top:10px}.admin-inline summary{cursor:pointer;font-weight:700}.version-admin-list{display:grid;gap:7px;margin-top:8px}.version-admin-list>div{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);padding:8px 10px;border-radius:10px}.note-form{display:grid;gap:7px}.note-form textarea{min-height:70px}.mini-notes{display:grid;gap:7px;margin-top:8px}.mini-notes>div{padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:#fafcfc}.mini-notes p{margin:0 0 4px;font-size:12px}.mini-notes small{color:var(--muted);font-size:10px}.top-actions .avatar{text-decoration:none;color:inherit}.badge.red{background:#fdeaea;color:#9d2626}.metric .badge{display:inline-flex}.panel hr{border:0;border-top:1px solid var(--line);margin:14px 0}
@media(max-width:1100px){.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.form-grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.course-grid{grid-template-columns:1fr}.form-grid-4{grid-template-columns:1fr 1fr}.case-admin-list a{grid-template-columns:60px 1fr}.case-admin-list small{grid-column:2}.version-row{flex-direction:column}.class-tools,.class-tools:has(.class-due){grid-template-columns:1fr}.zone-editor .grid-2{grid-template-columns:1fr}}
.dashboard-tasks{margin-bottom:14px}.task-chips{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.task-chips a{display:flex;flex-direction:column;gap:5px;padding:11px 12px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:inherit;background:#fbfdfd}.task-chips span{font-size:12px;color:var(--muted)}@media(max-width:900px){.task-chips{grid-template-columns:1fr 1fr}}@media(max-width:560px){.task-chips{grid-template-columns:1fr}}
#zonePreview{cursor:crosshair;touch-action:none}#draftZone{stroke-dasharray:8 5}
/* V4 interactive drawing workbench */
.drawing-workbench{display:grid;gap:10px}.v4-toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;padding:8px;border:1px solid var(--line);border-radius:12px;background:#f8fbfb}.tool-group{display:flex;gap:5px;flex-wrap:wrap;padding-right:8px;border-right:1px solid var(--line)}.tool-group:last-child{border-right:0;padding-right:0}.tool.danger-outline{border-color:#d29a9a;color:#9b3838}.v4-drawing{position:relative;overflow:hidden;border:1px solid #b9cbcd;border-radius:14px;background:#eef4f4}.v4-drawing svg,.v4-drawing canvas{width:100%;height:auto;display:block;min-height:420px;touch-action:none}.v4-drawing canvas{background:#f5f9f9}.maintenance-box{fill:none;stroke:#d7a94a;stroke-width:1.5;stroke-dasharray:6 5;opacity:.7}.training-object{fill:#245963;stroke:#245963;stroke-width:7;stroke-linecap:round}.training-object.column,.training-object.base_plate{stroke-width:1.5}.training-object.tray{stroke:#577ca0;stroke-width:9}.training-object.review{stroke:#c28a1d;fill:#d9a62c}.training-object.blocked{stroke:#b23a3a;fill:#c14c4c;stroke-dasharray:7 5;opacity:.75}.training-route{stroke:#177d83;stroke-width:4;fill:none;stroke-linecap:round}.training-route.review{stroke:#c28a1d;stroke-dasharray:8 5}.training-route.blocked{stroke:#b23a3a;stroke-dasharray:8 5}.annotation circle{fill:#fff;stroke:#4f7074;stroke-width:2}.annotation text{font-size:10px;fill:#445b60;font-weight:700}.annotation.rfi circle{fill:#fff3dd;stroke:#c78e20}.annotation.dimension line{stroke:#526b70;stroke-width:1.4}.annotation.dimension text{font-size:11px;paint-order:stroke;stroke:white;stroke-width:3px}.draft-line{stroke:#2e8285;stroke-width:3;stroke-dasharray:8 6;pointer-events:none}.draft-line.measure{stroke:#5d6b7a;stroke-width:2}.draft-start{fill:#fff;stroke:#2e8285;stroke-width:2;pointer-events:none}.drill-cross circle,.drill-cross line{stroke:#24717a;stroke-width:2;fill:#fff}.drill-cross.bad circle,.drill-cross.bad line{stroke:#b52e2e}.selected-object{filter:drop-shadow(0 0 4px rgba(20,100,110,.7));stroke-width:12!important}.truth-zone{stroke-width:2;stroke-dasharray:7 4}.truth-zone.no_drill{fill:rgba(190,45,45,.18);stroke:#b52b2b}.truth-zone.review{fill:rgba(215,154,29,.2);stroke:#bf8518}.truth-zone.approved{fill:rgba(36,145,104,.18);stroke:#238d66}.truth-zone.cable_no_go{fill:rgba(166,69,134,.16);stroke:#a74686}.truth-label{font-size:11px;font-weight:800;fill:#593c3c}.drawing-statusbar{display:flex;gap:15px;flex-wrap:wrap;align-items:center;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:white;font-size:10px;color:var(--muted)}.drawing-statusbar span:first-child{margin-right:auto;color:#334f54;font-weight:700}.drawing-help-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.drawing-help-grid>div{border:1px solid var(--line);border-radius:10px;padding:9px;background:#fafcfc}.drawing-help-grid b,.drawing-help-grid span{display:block}.drawing-help-grid b{font-size:11px}.drawing-help-grid span{font-size:9.5px;color:var(--muted);line-height:1.45;margin-top:3px}.prework-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.prework-grid textarea,.prework-grid button{grid-column:1/-1}.rfi-thread{display:grid;gap:8px;margin-top:10px}.rfi-card{border:1px solid var(--line);border-radius:10px;padding:10px;background:#fbfdfd}.rfi-card>div:first-child{display:flex;align-items:center;justify-content:space-between;gap:8px}.rfi-card p{font-size:11px;line-height:1.5}.rfi-card blockquote{margin:7px 0 0;padding:8px 10px;border-left:3px solid var(--brand);background:#eef6f6;font-size:10.5px}.rfi-card blockquote small{display:block;color:var(--muted);margin-top:4px}.rfi-reply-form{display:grid;grid-template-columns:1fr 120px auto;gap:6px;margin-top:8px}.rfi-reply-form textarea{min-height:55px}.report-drawing-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.report-drawing-summary>div{border:1px solid var(--line);padding:10px;text-align:center}.report-drawing-summary span{display:block;color:var(--muted);font-size:10px}.report-drawing-summary b{font-size:18px}.report-mini-drawing{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-top:8px}.report-mini-drawing svg{width:100%;height:auto;display:block}.report-object{stroke:#265963;stroke-width:7;fill:#265963}.report-object.blocked{stroke:#b23a3a;fill:#b23a3a;stroke-dasharray:7 5}.report-object.review{stroke:#c08a20;fill:#c08a20}.report-route{stroke:#177d83;stroke-width:4}.report-route.blocked{stroke:#b23a3a;stroke-dasharray:7 5}.report-route.review{stroke:#c08a20;stroke-dasharray:7 5}
@media(max-width:900px){.drawing-help-grid{grid-template-columns:1fr 1fr}.v4-drawing svg,.v4-drawing canvas{min-height:360px}.tool-group{border-right:0;padding-right:0}.prework-grid{grid-template-columns:1fr}.rfi-reply-form{grid-template-columns:1fr}.report-drawing-summary{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.drawing-help-grid{grid-template-columns:1fr}.v4-toolbar{gap:5px}.tool-group{width:100%}.tool-group .tool{flex:1;white-space:nowrap}.v4-drawing svg,.v4-drawing canvas{min-height:300px}.drawing-statusbar span:first-child{width:100%;margin-right:0}}


/* V5 drawing, versioning and polygon ground-truth extensions */
.v5-zone-editor .zone-canvas-wrap{display:grid;gap:8px}.zone-editor-help{display:flex;gap:10px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.zone-rect.hidden_utility,.truth-zone.hidden_utility{fill:rgba(191,53,53,.2);stroke:#a42c2c}.zone-rect.maintenance_clearance,.truth-zone.maintenance_clearance{fill:rgba(225,155,39,.15);stroke:#c48a26}.zone-rect.fire_route,.truth-zone.fire_route{fill:rgba(216,86,63,.15);stroke:#c65542}.zone-rect.crane_exclusion,.truth-zone.crane_exclusion{fill:rgba(99,89,173,.15);stroke:#6659ad}.zone-rect.cable_no_go,.truth-zone.cable_no_go{fill:rgba(166,69,134,.16);stroke:#a74686}.zone-rect{stroke-width:2}.zone-rect[points]{stroke-linejoin:round}.polygon-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.form-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.v5-version-row{grid-template-columns:minmax(240px,1fr) auto minmax(190px,.65fr)!important}.v5-workbench{position:relative}.sheet-tabs{display:flex;gap:6px;flex-wrap:wrap;padding:6px;border:1px solid var(--line);border-radius:12px;background:#f7fafa}.sheet-tab{border:1px solid transparent;background:transparent;border-radius:9px;padding:8px 11px;font-size:11px;font-weight:800;color:#50656a;cursor:pointer}.sheet-tab.active{background:#fff;border-color:#86b4b7;color:#0d6f73;box-shadow:0 1px 3px rgba(0,0,0,.05)}.v5-sheet{display:none}.v5-sheet.active{display:block}.readonly-sheet{border:1px solid #b9cbcd;border-radius:14px;overflow:hidden;background:#eef4f4}.readonly-sheet svg{width:100%;height:auto;display:block;min-height:420px}.datum-line{stroke:#526b70;stroke-width:2}.elev-column{stroke:#455c61;stroke-width:7}.v5-user-elev{stroke:#245963;stroke-width:8}.v5-user-elev.review,.v5-user-tray.review{stroke:#c28a1d;stroke-dasharray:8 5}.v5-user-elev.blocked,.v5-user-tray.blocked{stroke:#b23a3a;stroke-dasharray:8 5}.v5-user-tray{stroke:#577ca0;stroke-width:8}.section-frame{fill:none;stroke:#4b6267;stroke-width:6}.section-beam{stroke:#4b6267;stroke-width:8}.section-tray{fill:none;stroke:#1f7f83;stroke-width:9}.sld rect{fill:#f7fbfb;stroke:#36575d;stroke-width:2}.sld line{stroke:#36575d;stroke-width:4}.sld text{font-size:13px;font-weight:800;fill:#36575d}.sld-note{font-size:12px;font-weight:700;fill:#526b70}.section-line{stroke:#7b6969;stroke-width:1.5;stroke-dasharray:8 5}.section-bubble{fill:white;stroke:#7b6969;stroke-width:1.5}.section-text{font-weight:900;font-size:12px;fill:#5f5050}
.revision-overlay{opacity:.36!important;stroke:#6e7779!important;fill:#798385!important;stroke-dasharray:8 6!important}.training-route.lifting{stroke:#705ca0;stroke-width:4;stroke-dasharray:10 5}.training-route.lifting.blocked{stroke:#b23a3a}.selected-object{filter:drop-shadow(0 0 5px rgba(20,100,110,.85))}.replay-pop{filter:drop-shadow(0 0 8px rgba(19,127,132,.9));opacity:1!important}
.v5-drawing-bottom{display:grid;grid-template-columns:.8fr 1.15fr 1.15fr 1fr;gap:10px}.panel-lite{border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px;min-width:0}.panel-lite h4{margin:0;font-size:12px}.layer-control{border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px}.layer-control summary{font-size:12px;font-weight:800;cursor:pointer}.layer-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:9px}.layer-grid label{display:flex;align-items:center;gap:6px;font-size:10.5px;color:#50656a}.layer-grid input{width:auto}.object-inspector .form-stack{gap:7px}.object-inspector textarea{min-height:54px}.collision-panel{max-height:290px;overflow:auto}.collision-item{display:grid;gap:3px;border-left:3px solid #b9c8ca;padding:7px 8px;margin-top:6px;background:#fafcfc;border-radius:6px}.collision-item b{font-size:10px}.collision-item span{font-size:10px;line-height:1.45;color:#53676a}.collision-item.block,.collision-item.critical{border-left-color:#b23a3a;background:#fff5f5}.collision-item.warning{border-left-color:#c28a1d;background:#fffaf0}.mini-success{padding:8px;border-radius:8px;background:#eff9f5;color:#28785e;font-size:10.5px}.replay-controls{display:flex;gap:5px;flex-wrap:wrap;margin:8px 0}.replay-controls select{width:auto;min-width:65px}.model3d-tools{display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding:7px 8px;border:1px solid var(--line);border-radius:10px;background:#fafcfc;margin-bottom:7px}.model3d-tools span{font-size:10px;color:var(--muted);margin-left:auto}.model-view.active{background:#e7f4f4;border-color:#76b0b4;color:#0c7074}
@media(max-width:1180px){.v5-drawing-bottom{grid-template-columns:1fr 1fr}.v5-version-row{grid-template-columns:1fr auto!important}.v5-version-row #compareRevision{grid-column:1/-1}.readonly-sheet svg{min-height:360px}}
@media(max-width:720px){.v5-drawing-bottom{grid-template-columns:1fr}.form-grid-2{grid-template-columns:1fr}.v5-version-row{grid-template-columns:1fr!important}.v5-version-row>*{width:100%}.sheet-tabs{overflow-x:auto;flex-wrap:nowrap}.sheet-tab{white-space:nowrap}.readonly-sheet svg{min-height:300px}.layer-grid{grid-template-columns:1fr 1fr}}

/* V6 operational traceability, Training Twin and evidence extensions */
.twin-create-panel{margin-bottom:16px;border-color:#d7c58e;background:linear-gradient(180deg,#fffdf7,#fff)}.twin-create-panel .panel-head small,.twin-status-card small{color:var(--muted);font-size:10.5px}.twin-status-card{margin-top:14px;border-left:4px solid #c48a26}.snapshot-bar{margin-top:12px;border-top:1px solid var(--line);padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.snapshot-bar b,.snapshot-bar small{display:block}.snapshot-bar small{font-size:10px;color:var(--muted);margin-top:3px}.snapshot-actions{display:flex;gap:6px}.snapshot-actions input{border:1px solid #ccd9da;border-radius:8px;padding:7px 9px;min-width:180px}.snapshot-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin-top:8px}.snapshot-list>div{border:1px solid var(--line);border-radius:9px;background:#fafcfc;padding:8px}.snapshot-list b,.snapshot-list span,.snapshot-list small{display:block}.snapshot-list b{font-size:10.5px}.snapshot-list span,.snapshot-list small{font-size:9.5px;color:var(--muted);margin-top:3px}.test-values{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:6px 0}.test-values label,.wide-field{display:grid!important;gap:5px!important;font-size:10.5px!important}.test-values input,.wide-field select{border:1px solid #ccd9da;border-radius:8px;padding:8px;background:#fff}.energization-grid{margin-top:8px}.secondary-summary{margin-top:10px}.report-twin{border:1px solid #d9c78e;background:#fffaf0;padding:10px 12px;margin:12px 0;display:flex;justify-content:space-between;gap:12px}.report-twin b{color:#8a6417}.report-twin span{font-size:11px;color:#675b41}.three-picked{outline:2px solid #111}.review-target{font-size:10px;color:#5f7376;background:#f1f6f6;padding:4px 7px;border-radius:6px;display:inline-flex;margin-top:5px}.evidence-chip{display:inline-flex;padding:4px 7px;border-radius:999px;background:#edf6f6;color:#1b696d;font-size:9.5px;font-weight:700}.gate.twin-wait{border-color:#d7c58e}
@media(max-width:900px){.snapshot-list{grid-template-columns:1fr 1fr}.snapshot-bar{align-items:flex-start;flex-direction:column}.snapshot-actions{width:100%}.snapshot-actions input{flex:1}.test-values{grid-template-columns:1fr}.report-twin{flex-direction:column}}
@media(max-width:560px){.snapshot-list{grid-template-columns:1fr}.snapshot-actions{flex-direction:column}.snapshot-actions input,.snapshot-actions button{width:100%}}


/* V8 */
.file-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px;align-items:center}.file-row>.file-annotate{white-space:nowrap;text-decoration:none}.mep-obstacle{stroke-width:1.5}.mep-obstacle.duct{fill:#d6e4e7;stroke:#668b92}.mep-obstacle.fire_pipe{fill:#f4dada;stroke:#b64848}.mep-obstacle.process_pipe{fill:#eadfce;stroke:#9b7041}.mep-obstacle.hot_zone{fill:rgba(222,145,42,.18);stroke:#ce861e;stroke-dasharray:5 4}.mep-label{font-size:8.5px;font-weight:800;fill:#546a6d}.three-stage{position:relative;min-height:480px;background:#eef4f4}.three-stage canvas{width:100%;display:block}.three-webgl{display:block!important;width:100%!important;min-height:480px}.three-badge{position:absolute;top:10px;right:10px;background:rgba(255,255,255,.88);border:1px solid #b9cbcd;border-radius:999px;padding:5px 9px;font-size:9.5px;color:#5b6d70;pointer-events:none}.three-badge.active{color:#116f72;border-color:#6fabaf}.three-shell{overflow:hidden}.model3d-tools #threeEditToggle.active{background:#fff0d6;border-color:#d3a34a;color:#8b6115;font-weight:800}
@media(max-width:640px){.file-row{grid-template-columns:1fr}.file-row>.file-annotate{justify-self:start}.three-stage,.three-webgl{min-height:400px}}

/* V9 engineering drawing + offline WebGL */
.v9-component-picker{align-items:center}.v9-component-picker select{max-width:250px;border:1px solid var(--line);border-radius:8px;padding:7px 9px;background:#fff;font-size:10.5px}.component-library-panel{grid-column:1/-1}.component-chip-list{display:flex;gap:5px;flex-wrap:wrap}.component-chip-list span{border:1px solid var(--line);background:#f8fbfb;border-radius:999px;padding:5px 8px;font-size:9.5px;color:#53676a}.component-chip-list b{color:#0b6d70}.object-refline{display:flex;gap:7px;align-items:center}.object-refline span:first-child{background:#e8f3f4;color:#0b6d70;border-radius:6px;padding:4px 7px;font-size:10px;font-weight:800}.object-refline span:last-child{font-size:10.5px;color:var(--muted)}.form-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.collision-item[role],button.collision-item{width:100%;text-align:left;border-top:0;border-right:0;border-bottom:0;cursor:pointer}.collision-item small{font-size:9px;color:#7b6464}.rfi-object-ref{display:inline-flex;margin:3px 0 7px;padding:3px 6px;border-radius:5px;background:#eef4f7;color:#476774}.local-webgl-canvas{display:block;width:100%;min-height:480px;background:#f5f9f9}.three-badge.ok{color:#0a7377;border-color:#6eafb2;background:rgba(245,255,255,.92)}.training-object.device circle{fill:#eff8f8;stroke:#245d63;stroke-width:4}.training-object.brace{stroke-dasharray:8 4}.training-object.handrail{stroke-width:4}.training-object.grating{stroke-width:12;opacity:.7}.report-components{margin:12px 0}.report-components h3{font-size:13px;margin:0 0 6px}.report-components table{font-size:9.5px}.component-library-panel+.object-inspector{margin-top:0}@media(max-width:760px){.form-grid-3{grid-template-columns:1fr}.v9-component-picker select{max-width:none;flex:1}.local-webgl-canvas{min-height:380px}}