*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Segoe UI',Arial,sans-serif;font-size:13px;background:#f0f2f5;color:#1a1a1a;overflow:hidden}
:root{--bg:#fff;--bg2:#f5f6f8;--bg3:#eceef1;--border:#d0d4da;--blue:#1a6fb5;--blue2:#e8f1fb;--green:#1a7a3a;--amber:#b56a00;--red:#c0302a;--text:#1a1a1a;--text2:#555;--panel-w:220px;--ribbon-h:88px;--bottom-h:180px}
.main-layout{display:flex;flex-direction:column;height:100vh;overflow:hidden}

/* ===== App header ===== */
#cr-appbar{display:flex;align-items:center;gap:0;background:linear-gradient(90deg,#0d1f3c 0%,#162d52 60%,#1a3a6b 100%);height:38px;padding:0 14px 0 10px;flex-shrink:0;border-bottom:2px solid #2a6fb5;box-shadow:0 2px 8px rgba(0,0,0,.35);position:relative;z-index:100}
#cr-logo-mark{font-family:'Courier New',monospace;font-size:18px;font-weight:900;color:#fff;letter-spacing:-1px;line-height:1}
#cr-logo-mark span{color:#3fa8ff}
#cr-byline{font-size:10px;color:#6a8cb0;letter-spacing:.5px;margin-left:4px;padding-top:1px}
#cr-title-sep{width:1px;height:20px;background:#2a4a7a;margin:0 12px;flex-shrink:0}
#cr-app-name{font-size:12px;font-weight:600;color:#c5d8ef;letter-spacing:.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0;flex-shrink:1}
#cr-spacer{flex:1}
#cr-version{font-size:10px;color:#4a6a8a;margin-left:10px;letter-spacing:.3px}
#cr-helpbtn{display:flex;align-items:center;gap:5px;padding:5px 13px;background:#1a6fb5;border:1px solid #2a85d0;border-radius:5px;cursor:pointer;color:#fff;font-size:11px;font-weight:600;letter-spacing:.3px;transition:all .15s;user-select:none}
#cr-helpbtn:hover{background:#1e82d4;box-shadow:0 0 0 2px rgba(30,130,212,.3)}
#cr-helpbtn i{font-size:13px}

/* ===== Ribbon ===== */
.ribbon{height:var(--ribbon-h);background:var(--bg);border-bottom:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}
.ribbon-tabs{display:flex;background:#2a3a5c;height:28px}
.rtab{padding:0 14px;color:#a0adc0;font-size:12px;cursor:pointer;display:flex;align-items:center;border-right:1px solid #1e2d48;transition:all .15s;user-select:none}
.rtab.active{background:#1a6fb5;color:#fff}
.ribbon-tools{display:flex;align-items:center;padding:4px 8px;gap:4px;flex:1;overflow-x:auto}
.rtool{display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 8px;border-radius:6px;cursor:pointer;border:1px solid transparent;min-width:52px;transition:all .15s;user-select:none;color:var(--text)}
.rtool:hover{background:var(--bg2);border-color:var(--border)}
.rtool.active{background:var(--blue2);border-color:#90bce8;color:var(--blue)}
.rtool i{font-size:18px}
.rtool span{font-size:10px;text-align:center;line-height:1.2;white-space:nowrap}
.rsep{width:1px;background:var(--border);height:40px;margin:0 4px;flex-shrink:0}
.rnote{padding:0 8px;font-size:11px;color:var(--amber);display:flex;align-items:center;gap:4px;white-space:nowrap}

/* ===== Workspace ===== */
.workspace{display:flex;flex:1;min-height:0;overflow:hidden}
.left-panel{width:var(--panel-w);background:var(--bg);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;flex-shrink:0}
.panel-header{padding:8px 12px;font-weight:600;font-size:12px;color:var(--text2);background:var(--bg2);border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.5px}
.lib-search{padding:6px 8px;border-bottom:1px solid var(--border)}
.lib-search input{width:100%;padding:4px 8px;border:1px solid var(--border);border-radius:4px;font-size:12px;background:var(--bg);color:var(--text)}
.lib-group{overflow-y:auto;flex:1}
.lib-cat{padding:6px 12px 4px;font-size:11px;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.5px;background:var(--bg2);border-bottom:1px solid var(--border)}
.lib-item{display:flex;align-items:center;gap:8px;padding:5px 12px;cursor:grab;border-bottom:1px solid #f0f2f5;transition:background .1s;user-select:none}
.lib-item:hover{background:var(--blue2)}
.lib-item.active{background:var(--blue2);box-shadow:inset 2px 0 0 var(--blue)}
.lib-item:active{cursor:grabbing}
.lib-sym{width:28px;height:24px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.lib-label{font-size:12px;color:var(--text)}

.canvas-area{flex:1;position:relative;overflow:hidden;background:#f0f2f5}
#main-canvas{position:absolute;top:0;left:0;width:100%;height:100%;touch-action:none;cursor:crosshair;z-index:2}
#three-container{position:absolute;inset:0;display:none;z-index:1;background:#f7f9fb}
#three-container canvas{display:block;width:100%;height:100%;outline:none}
.canvas-toolbar{position:absolute;top:8px;left:50%;transform:translateX(-50%);display:flex;gap:4px;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:4px;box-shadow:0 2px 8px rgba(0,0,0,.1);z-index:10}
.ctool{width:30px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:4px;cursor:pointer;border:1px solid transparent;transition:all .15s;color:var(--text)}
.ctool:hover{background:var(--bg2);border-color:var(--border)}
.ctool.active{background:var(--blue2);border-color:#90bce8;color:var(--blue)}
.ctool i{font-size:15px}
.view-toggle{position:absolute;top:8px;right:8px;display:flex;background:var(--bg);border:1px solid var(--border);border-radius:6px;overflow:hidden;z-index:10;box-shadow:0 2px 8px rgba(0,0,0,.1)}
.vtbtn{padding:5px 11px;font-size:11px;cursor:pointer;border:none;background:transparent;color:var(--text2);transition:all .15s;border-right:1px solid var(--border)}
.vtbtn:last-child{border-right:none}
.vtbtn.active{background:var(--blue);color:#fff}
.nav-hint{position:absolute;top:48px;right:8px;background:#fff;border:1px solid var(--border);border-radius:6px;padding:5px 8px;font-size:11px;color:#555;z-index:10;box-shadow:0 2px 8px rgba(0,0,0,.08);max-width:220px;text-align:right}
.grid-coords{position:absolute;bottom:8px;left:8px;font-size:11px;color:#888;pointer-events:none;z-index:5;background:rgba(255,255,255,.7);padding:2px 6px;border-radius:4px}
.canvas-hint{position:absolute;bottom:8px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.6);color:#fff;font-size:11px;padding:4px 10px;border-radius:10px;pointer-events:none;z-index:5;white-space:nowrap;display:none}
.conn-pending{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);background:#1a6fb5;color:#fff;font-size:12px;padding:5px 14px;border-radius:12px;z-index:20;pointer-events:none;display:none}
.view3d-badge{position:absolute;top:48px;left:8px;background:rgba(26,111,181,.12);border:1px solid #90bce8;border-radius:6px;padding:6px 10px;z-index:10;font-size:11px;color:#555;display:none;max-width:240px}
.view3d-badge strong{color:var(--blue);display:block;font-size:11px;margin-bottom:2px}

.right-panel{width:250px;background:var(--bg);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;flex-shrink:0}
.prop-group{padding:8px 10px;border-bottom:1px solid #f0f0f0}
.prop-group-label{font-size:10px;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}
.prop-row{display:flex;align-items:center;gap:6px;margin-bottom:5px}
.prop-label{width:96px;font-size:11px;color:var(--text2);flex-shrink:0}
.prop-input{flex:1;padding:3px 6px;border:1px solid var(--border);border-radius:3px;font-size:11px;background:var(--bg);color:var(--text);min-width:0}
.prop-input:focus{outline:none;border-color:var(--blue)}
.prop-input[readonly]{background:#f1f3f5;color:#666}
.prop-select{flex:1;padding:3px 6px;border:1px solid var(--border);border-radius:3px;font-size:11px;background:var(--bg);color:var(--text)}
.prop-check{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--text);margin-bottom:5px}
.no-sel{padding:20px 12px;text-align:center;color:var(--text2);font-size:12px;line-height:1.6}
.prop-btn{width:100%;padding:5px 8px;border:1px solid var(--border);border-radius:4px;background:#fff;cursor:pointer;font-size:11px;color:var(--text);margin-top:4px}
.prop-btn:hover{background:var(--blue2);border-color:#90bce8;color:var(--blue)}
.prop-btn.danger{color:var(--red);border-color:#e8b8b4}
.prop-btn.danger:hover{background:#fbeceb}
.dir-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin:8px 0 12px}
.dirbtn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;padding:10px 4px;border:1px solid var(--border);border-radius:6px;background:#fff;cursor:pointer;color:var(--text);transition:all .15s;user-select:none}
.dirbtn:hover{background:var(--blue2);border-color:#90bce8}
.dirbtn.active{background:var(--blue);border-color:var(--blue);color:#fff}
.dirbtn i{font-size:18px}
.dirbtn span{font-size:10px;font-weight:600;text-align:center;line-height:1.2}
.turn-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:8px 0 4px}
.angle-presets{display:flex;gap:6px;margin:6px 0 10px}
.angle-preset{flex:1;padding:4px 0;border:1px solid var(--border);border-radius:4px;background:#fff;cursor:pointer;font-size:11px;color:var(--text2);text-align:center}
.angle-preset:hover{background:var(--blue2);border-color:#90bce8;color:var(--blue)}
.angle-preset.active{background:var(--blue2);border-color:#90bce8;color:var(--blue);font-weight:600}
.pill{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:10px;font-size:10px;font-weight:600}
.pill.ok{background:#e6f4e6;color:var(--green)}
.pill.warn{background:#fff3cd;color:var(--amber)}
.pill.err{background:#f8d7da;color:var(--red)}
.pill.muted{background:var(--bg3);color:var(--text2)}

/* ===== Bottom panel ===== */
.bottom-panel{background:var(--bg);border-top:1px solid var(--border);flex-shrink:0;transition:height .2s}
.bottom-tabs{display:flex;align-items:center;border-bottom:1px solid var(--border);background:var(--bg2)}
.btab{display:flex;align-items:center;gap:6px;padding:7px 12px;font-size:12px;cursor:pointer;color:var(--text2);border-right:1px solid var(--border);user-select:none}
.btab.active{background:var(--bg);color:var(--text);font-weight:600;box-shadow:inset 0 -2px 0 var(--blue)}
.btab .badge{padding:0 6px;border-radius:8px;font-size:10px;font-weight:700;background:var(--bg3);color:var(--text2)}
.btab .badge.issues{background:#fbeceb;color:var(--red)}
.bcollapse{margin-left:auto;padding:0 10px;cursor:pointer;color:var(--text2);font-size:16px;display:flex;align-items:center}
.bottom-content{height:152px;overflow-y:auto;padding:8px 12px}
.issue-item{display:flex;align-items:flex-start;gap:8px;padding:4px 0;border-bottom:1px solid #f5f5f5;font-size:12px}
.issue-dot{width:6px;height:6px;border-radius:50%;margin-top:4px;flex-shrink:0}
.issue-dot.err{background:var(--red)}
.issue-dot.warn{background:#e8a020}
.issue-dot.ok{background:var(--green)}
.status-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:6px}
.status-card{background:var(--bg2);border:1px solid var(--border);border-radius:6px;padding:8px 10px}
.status-card .val{font-size:20px;font-weight:600;margin-bottom:2px}
.status-card .lbl{font-size:11px;color:var(--text2)}
.status-card.ok .val{color:var(--green)}
.status-card.warn .val{color:var(--amber)}
.status-card.err .val{color:var(--red)}
.wf-step{display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px solid #f0f0f0;font-size:12px}
.wf-num{width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:600;flex-shrink:0}
.wf-num.done{background:#d4edda;color:var(--green)}
.wf-num.active{background:var(--blue);color:#fff}
.wf-num.todo{background:var(--bg3);color:var(--text2)}
.log-item{font-size:11px;color:var(--text2);padding:2px 0;border-bottom:1px solid #f7f7f7;font-family:'Courier New',monospace}

/* ===== Calc results drawer ===== */
.calc-results-drawer{position:fixed;top:96px;right:262px;height:calc(100vh - 200px);width:min(640px,calc(100vw - 540px));min-width:420px;min-height:260px;max-width:calc(100vw - 280px);max-height:calc(100vh - 120px);background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.18);z-index:60;display:none;flex-direction:column;overflow:hidden;resize:both}
.calc-results-drawer.open{display:flex}
.calc-drawer-head{display:flex;align-items:center;gap:8px;padding:10px 12px;background:#f8fafc;border-bottom:1px solid var(--border);cursor:move;user-select:none}
.calc-drawer-title{font-weight:700;font-size:13px;color:var(--text);flex:1}
.calc-drawer-actions{display:flex;gap:6px}
.calc-mini-btn{border:1px solid var(--border);background:#fff;border-radius:5px;padding:5px 8px;font-size:11px;cursor:pointer;color:var(--text)}
.calc-mini-btn:hover{background:var(--blue2);border-color:#90bce8;color:var(--blue)}
.calc-drawer-body{padding:10px 12px;overflow-y:auto;flex:1;background:#fff}
.calc-summary-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-bottom:10px}
.calc-summary-cards.inputs{grid-template-columns:repeat(3,minmax(0,1fr))}
.calc-summary-card .big.compact{font-size:14px;line-height:1.25;word-break:break-word}
.segment-selection-top{background:#eef6ff;border-bottom:1px solid #c9ddf1}
.segment-selection-top .prop-row{display:block;margin-bottom:8px}
.segment-selection-top .prop-label{display:block;width:auto;margin-bottom:3px;font-weight:600;color:#334}
.segment-selection-top .prop-select,.segment-selection-top .prop-input{width:100%;display:block;min-height:30px}
.calc-summary-card{border:1px solid var(--border);border-radius:8px;background:#f8fafc;padding:9px 10px}
.calc-summary-card .big{font-size:18px;font-weight:700;color:var(--blue);line-height:1.1}
.calc-summary-card .small{font-size:10px;text-transform:uppercase;letter-spacing:.4px;color:var(--text2);margin-top:3px}
.calc-card{border:1px solid var(--border);border-radius:8px;margin-bottom:10px;background:#fff;overflow:hidden}
.calc-card-head{display:flex;align-items:center;gap:8px;background:#f5f6f8;padding:8px 10px;border-bottom:1px solid var(--border)}
.calc-card-title{font-size:13px;font-weight:700;flex:1;color:var(--text)}
.calc-card-result{font-size:15px;font-weight:800;color:var(--blue);white-space:nowrap}
.calc-card-body{padding:10px;font-size:12px;line-height:1.55}
.calc-kv{display:grid;grid-template-columns:150px 1fr;gap:5px 8px;margin-bottom:8px}
.calc-kv .k{font-weight:600;color:var(--text2)}
.calc-kv .v{color:var(--text)}
.calc-empty{border:1px dashed var(--border);border-radius:8px;padding:18px;text-align:center;color:var(--text2);font-size:12px;background:#fafafa}
.calc-action-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;margin-bottom:10px}
.calc-btn{padding:7px 8px;border:1px solid var(--border);border-radius:6px;background:#fff;cursor:pointer;font-size:11px;text-align:left;color:var(--text)}
.calc-btn:hover{background:var(--blue2);border-color:#90bce8;color:var(--blue)}
.sparkline{width:100%;height:54px}

/* ===== Modals (templates / help / report) ===== */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(5,15,35,.55);z-index:8500;align-items:center;justify-content:center;backdrop-filter:blur(2px)}
.modal-overlay.open{display:flex}
.modal-box{width:min(940px,96vw);max-height:88vh;background:#fff;border:1px solid #c8d4e2;border-radius:12px;box-shadow:0 22px 60px rgba(0,0,0,.35);display:flex;flex-direction:column;overflow:hidden}
.modal-head{display:flex;align-items:center;gap:10px;padding:14px 18px;background:#f6f9fd;border-bottom:1px solid #d8e2ee}
.modal-title{font-weight:800;color:#17385f;font-size:15px;flex:1}
.modal-close{border:1px solid #ccd6e2;background:#fff;border-radius:6px;padding:6px 10px;cursor:pointer}
.modal-body{padding:14px 18px 18px;overflow-y:auto}
.report-page{background:#fff;color:#111;padding:18px;line-height:1.45;font-size:12px}
.report-page h1{font-size:22px;margin-bottom:6px;color:#1a3f67}
.report-page h2{font-size:15px;margin:14px 0 6px;color:#1a3f67;border-bottom:1px solid #cfd6df;padding-bottom:3px}
.report-page table{width:100%;border-collapse:collapse;margin:6px 0 10px;font-size:11px}
.report-page th,.report-page td{border:1px solid #bbb;padding:5px;text-align:left;vertical-align:top}
.report-page th{background:#eef3f8}
.report-note{border-left:4px solid var(--amber);background:#fff8e8;padding:7px 10px;margin:8px 0}

.main-layout:fullscreen{width:100vw;height:100vh;background:#f0f2f5}

/* ===== Editable engineering library ===== */
.library-modal-box{width:min(1120px,97vw);height:min(780px,92vh)}
.library-editor-tabs{display:flex;gap:4px;padding:8px 12px;background:#eef3f8;border-bottom:1px solid var(--border);flex-wrap:wrap}
.library-editor-tab{padding:7px 12px;border:1px solid var(--border);border-radius:6px;background:#fff;cursor:pointer;font-size:12px;font-weight:600;color:var(--text2)}
.library-editor-tab.active{background:var(--blue);border-color:var(--blue);color:#fff}
.library-toolbar{display:flex;align-items:center;gap:7px;margin-bottom:10px;flex-wrap:wrap}
.library-toolbar .spacer{flex:1}
.library-table-wrap{overflow:auto;border:1px solid var(--border);border-radius:8px;max-height:530px}
.library-table{width:100%;border-collapse:collapse;font-size:11px;min-width:820px}
.library-table th{position:sticky;top:0;background:#eaf0f7;color:#294663;z-index:2;text-align:left;padding:7px 6px;border-bottom:1px solid var(--border);white-space:nowrap}
.library-table td{padding:5px 6px;border-bottom:1px solid #edf0f3;vertical-align:middle}
.library-table input,.library-table select{width:100%;min-width:72px;padding:4px 5px;border:1px solid var(--border);border-radius:4px;font-size:11px;background:#fff}
.library-table input:focus,.library-table select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 2px rgba(26,111,181,.12)}
.library-delete{border:1px solid #e3b4b1;background:#fff;color:var(--red);border-radius:5px;padding:4px 7px;cursor:pointer}
.library-delete:hover{background:#fbeceb}
.library-footer{display:flex;gap:8px;align-items:center;padding:10px 14px;border-top:1px solid var(--border);background:#f8fafc}
.library-footer .spacer{flex:1}
.library-primary{border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:6px;padding:7px 12px;cursor:pointer;font-weight:600}
.library-secondary{border:1px solid var(--border);background:#fff;color:var(--text);border-radius:6px;padding:7px 12px;cursor:pointer}
.library-note{font-size:11px;color:var(--text2);line-height:1.45;margin-bottom:10px}
.defaults-grid{display:grid;grid-template-columns:repeat(3,minmax(180px,1fr));gap:10px}
.default-card{border:1px solid var(--border);border-radius:7px;padding:9px;background:#fafbfd}
.default-card label{display:block;font-size:10px;text-transform:uppercase;color:var(--text2);font-weight:700;margin-bottom:4px}
.default-card input,.default-card select{width:100%;padding:6px;border:1px solid var(--border);border-radius:5px;background:#fff}
@media(max-width:850px){.defaults-grid{grid-template-columns:1fr 1fr}}

@media print{.ribbon,.left-panel,.right-panel,.canvas-area,.bottom-panel,#cr-appbar{display:none!important}}

/* ===== ManholeCheck extension ===== */
.mh-badge{position:absolute;right:8px;bottom:8px;left:auto;top:auto;z-index:9;pointer-events:none;max-width:min(46%,420px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;background:rgba(255,255,255,.90);border:1px solid #b9c8d8;border-radius:6px;padding:4px 8px;font-size:10px;color:#294663;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.mh-route-banner{position:absolute;left:50%;bottom:38px;transform:translateX(-50%);z-index:30;background:#17385f;color:white;padding:7px 14px;border-radius:14px;font-size:11px;display:none}
.mh-form{display:grid;grid-template-columns:1fr 1fr;gap:9px}.mh-form label{font-size:10px;font-weight:700;text-transform:uppercase;color:#526477}.mh-form input,.mh-form select{width:100%;margin-top:3px;padding:6px;border:1px solid var(--border);border-radius:5px}.mh-full{grid-column:1/-1}.mh-help{font-size:11px;line-height:1.5;color:#59697a;background:#eef5fb;border-left:4px solid var(--blue);padding:8px;margin-bottom:10px}

/* Keep the primary wire command visible at the start of Home. */