*{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;--green2:#e7f6ec;--amber:#b56a00;--amber2:#fff6e3;--red:#c0302a;--red2:#fdeceb;--text:#1a1a1a;--text2:#5a6270;--panel-w:236px;--ribbon-h:84px;--bottom-h:210px}
html,body{height:100%}
.app{display:flex;flex-direction:column;height:100vh}

/* 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:#1c3457;height:28px;align-items:center;width:100%}
.brand{color:#fff;font-weight:700;font-size:12.5px;padding:0 14px;display:flex;align-items:center;gap:6px;letter-spacing:.3px}
.brand i{color:#5ea4e0}
.rtab{padding:0 11px;color:#9fb0c8;font-size:12px;cursor:pointer;display:flex;align-items:center;border-right:1px solid #15294630;transition:all .15s;height:100%}
.rtab.active{background:var(--blue);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 7px;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:42px;margin:0 4px;flex-shrink:0}

/* WORKSPACE */
.workspace{display:flex;flex:1;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;transition:width .18s ease,opacity .18s ease}
.panel-header{padding:8px 12px;font-weight:600;font-size:11.5px;color:var(--text2);background:var(--bg2);border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.5px}
.lib-group{overflow-y:auto;flex:1}
.lib-cat{padding:6px 12px 4px;font-size:11px;font-weight:700;color:#3a5a82;text-transform:uppercase;letter-spacing:.5px;background:var(--bg2);border-bottom:1px solid var(--border);border-top:1px solid var(--border)}
.lib-item{display:flex;align-items:center;gap:8px;padding:6px 12px;cursor:pointer;border-bottom:1px solid #f0f2f5;transition:background .1s;user-select:none}
.lib-item:hover{background:var(--blue2)}
.lib-sym{width:26px;height:26px;border-radius:50%;border:2px solid #6a7686;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:9px;font-weight:700;color:#6a7686;background:#fff}
.lib-label{font-size:12px;color:var(--text);line-height:1.3}
.lib-sub{font-size:10px;color:var(--text2)}
.lib-note{padding:10px 12px;font-size:11px;color:var(--text2);line-height:1.5;background:#fbfbfc;border-top:1px solid var(--border)}

.canvas-area{flex:1;position:relative;overflow:hidden;background:#dde5ec}
.app.hide-left .left-panel{display:none!important;width:0!important;min-width:0!important;flex-basis:0!important;border-right:0!important;opacity:0;pointer-events:none}
.app.hide-right .right-panel{display:none!important;width:0!important;min-width:0!important;flex-basis:0!important;border-left:0!important;opacity:0;pointer-events:none}
.panel-toggle{position:absolute;top:50%;transform:translateY(-50%);z-index:14;width:24px;height:54px;border:1px solid var(--border);background:rgba(255,255,255,.96);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.12);color:var(--text2)}
.panel-toggle:hover{background:var(--blue2);color:var(--blue)}
.panel-toggle.left{left:0;border-radius:0 7px 7px 0}
.panel-toggle.right{right:0;border-radius:7px 0 0 7px}
#svg{cursor:grab}
#view2d, #view3d-wrap{position:absolute;inset:0}
#view3d-wrap{display:none}
#view3d-wrap canvas{display:block;width:100%;height:100%}
.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,.12);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:6px 16px;font-size:12px;cursor:pointer;border:none;background:transparent;color:var(--text2);transition:all .15s;font-weight:600}
.vtbtn.active{background:var(--blue);color:#fff}
.scale-badge{position:absolute;bottom:10px;left:10px;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:4px 10px;font-size:11px;color:var(--text2);z-index:10}
.hint-badge{position:absolute;bottom:10px;right:10px;background:rgba(255,255,255,.92);border:1px solid var(--border);border-radius:6px;padding:5px 10px;font-size:11px;color:var(--text2);z-index:10;max-width:280px;line-height:1.4}
.canvas-footer-brand{position:absolute;bottom:10px;left:50%;transform:translateX(-50%);z-index:11;pointer-events:none;font-size:11px;font-weight:600;letter-spacing:.15px;color:var(--text2);background:rgba(21,26,34,.78);border:1px solid var(--border);border-radius:6px;padding:4px 10px;white-space:nowrap;box-shadow:0 1px 5px rgba(0,0,0,.25)}
@media print{.canvas-footer-brand{display:none!important}}


/* ---- Canvas maximise (fullscreen) state ---- */
/* canvas-max only triggers browser fullscreen (hides address bar); all panels remain visible */
.app.canvas-max .workspace { flex:1; }
.app.canvas-max .canvas-area { flex:1; }
/* Exit hint shown only in fullscreen */
.canvas-exit-hint{display:none;position:absolute;top:8px;left:50%;transform:translateX(-50%);background:rgba(26,111,181,.92);color:#fff;border-radius:6px;padding:5px 12px;font-size:11px;z-index:15;pointer-events:none;white-space:nowrap}
.app.canvas-max .canvas-exit-hint{display:block}

.right-panel{width:400px;background:var(--bg);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto;flex-shrink:0;transition:width .18s ease,opacity .18s ease}
.prop-group{padding:9px 11px;border-bottom:1px solid #eef0f3}
.prop-group-label{font-size:10.5px;font-weight:700;color:#3a5a82;text-transform:uppercase;letter-spacing:.5px;margin-bottom:7px}
.prop-row{display:flex;align-items:center;gap:6px;margin-bottom:6px}
.prop-label{width:130px;font-size:11px;color:var(--text2);flex-shrink:0}
.prop-input{flex:1;padding:4px 6px;border:1px solid var(--border);border-radius:4px;font-size:11.5px;background:var(--bg);color:var(--text);min-width:0}
.prop-input:focus{outline:none;border-color:var(--blue)}
.prop-select{flex:1;padding:4px 6px;border:1px solid var(--border);border-radius:4px;font-size:11.5px;background:var(--bg);color:var(--text)}
.no-sel{padding:24px 14px;text-align:center;color:var(--text2);font-size:12px;line-height:1.7}
.no-sel i{font-size:30px;color:#c4cbd6;display:block;margin-bottom:8px}
.btn{padding:6px 12px;border-radius:5px;border:1px solid var(--border);background:var(--bg);cursor:pointer;font-size:11.5px;color:var(--text);font-weight:600}
.btn:hover{background:var(--bg2)}
.btn.primary{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn.primary:hover{background:#155a91}
.btn.danger{background:var(--red2);color:var(--red);border-color:#f0bcb8}
.btn-row{display:flex;gap:6px;padding:9px 11px}
.chip{display:inline-block;padding:2px 7px;border-radius:10px;font-size:10px;font-weight:700}
.chip.ok{background:var(--green2);color:var(--green)}
.chip.warn{background:var(--amber2);color:var(--amber)}
.chip.bad{background:var(--red2);color:var(--red)}

/* BOTTOM PANEL */
.bottom-panel{background:var(--bg);border-top:1px solid var(--border);flex-shrink:0;height:var(--bottom-h);display:flex;flex-direction:column;overflow:hidden;position:relative;min-height:32px;max-height:90vh}
.bp-resize-handle{position:absolute;top:0;left:0;right:0;height:5px;cursor:ns-resize;background:transparent;z-index:20;transition:background .15s}
.bp-resize-handle:hover,.bp-resize-handle.dragging{background:var(--blue)}
.bp-maximize{display:flex;align-items:center;padding:0 8px;cursor:pointer;color:var(--text2);margin-left:4px;font-size:13px}
.bp-maximize:hover{color:var(--blue)}
.bp-tabs{display:flex;background:var(--bg2);border-bottom:1px solid var(--border);flex-shrink:0}
.bptab{padding:7px 16px;font-size:11.5px;cursor:pointer;color:var(--text2);font-weight:600;border-right:1px solid var(--border)}
.bptab.active{background:var(--bg);color:var(--blue);border-bottom:2px solid var(--blue);margin-bottom:-1px}
.bp-body{flex:1;overflow:auto;padding:10px 14px}
.bp-collapse{margin-left:auto;display:flex;align-items:center;padding:0 10px;cursor:pointer;color:var(--text2)}
table.results{width:100%;border-collapse:collapse;font-size:11.5px}
table.results th{position:sticky;top:0;z-index:2;text-align:left;background:var(--bg2);padding:6px 8px;border-bottom:2px solid var(--border);color:var(--text2);font-weight:700;white-space:nowrap}
table.results td{padding:5px 8px;border-bottom:1px solid #eef0f3;white-space:nowrap}
table.results tr:hover td{background:#f7fafd}
.summary-cards{display:flex;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.scard{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:9px 14px;min-width:130px}
.scard .v{font-size:19px;font-weight:700;color:var(--blue)}
.scard .l{font-size:10.5px;color:var(--text2);text-transform:uppercase;letter-spacing:.4px;margin-top:2px}
.scard.warn .v{color:var(--amber)}
.scard.bad .v{color:var(--red)}
.disclaimer-box{background:#1a1a2e;color:#e8e8f0;border-left:4px solid #c0302a;padding:8px 12px;font-size:10.5px;font-weight:600;line-height:1.5;letter-spacing:.1px;margin-bottom:6px}
.disclaimer-box.bottom{margin-top:8px;margin-bottom:0}
.note-box{background:var(--amber2);border-left:3px solid var(--amber);padding:8px 10px;font-size:11px;color:#6a4a00;line-height:1.5;margin-bottom:8px;border-radius:0 4px 4px 0}
.breakdown-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:8px}
.bd-card{border:1px solid var(--border);border-radius:7px;padding:8px 10px;background:#fff}
.bd-card h4{font-size:11.5px;margin-bottom:5px;color:var(--text)}
.bd-card .row{display:flex;justify-content:space-between;font-size:10.5px;color:var(--text2);padding:1px 0}
.bd-card .row b{color:var(--text);font-weight:600}


/* VALIDATION TEMPLATE SELECTOR */
.validation-grid{display:grid;grid-template-columns:repeat(3,minmax(150px,1fr));gap:10px;margin:10px 0 14px}
.validation-grid label{display:flex;flex-direction:column;gap:5px;font-size:11px;font-weight:700;color:var(--text2)}
.validation-grid select{padding:7px 8px;border:1px solid var(--border);border-radius:5px;background:var(--bg);color:var(--text)}
.validation-note{padding:9px 11px;border:1px solid var(--border);border-radius:6px;background:var(--bg2);font-size:11px;line-height:1.5;color:var(--text2)}
@media(max-width:650px){.validation-grid{grid-template-columns:1fr}}

/* MODAL */
.modal-ov{position:fixed;inset:0;background:rgba(20,30,45,.45);display:none;align-items:center;justify-content:center;z-index:100}
.modal{background:#fff;border-radius:10px;max-width:560px;width:92%;max-height:82vh;overflow:auto;box-shadow:0 12px 40px rgba(0,0,0,.25)}
.modal-head{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.modal-head h3{font-size:15px;color:#17385f}
.modal-body{padding:16px 18px;font-size:12px;line-height:1.6;color:var(--text2)}
.modal-body h4{color:var(--text);margin:10px 0 4px;font-size:12.5px}
.close-x{cursor:pointer;color:var(--text2);font-size:18px}

::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#c5cbd4;border-radius:5px}
::-webkit-scrollbar-track{background:transparent}

/* IEEE Validation Suite — wide desktop layout */
#ieee-validation-modal{
  padding:10px;
}
#ieee-validation-modal .ieee-validation-modal-wide{
  width:calc(100vw - 20px);
  max-width:1600px;
  max-height:calc(100vh - 20px);
  border-radius:9px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
#ieee-validation-modal .modal-head{
  flex:0 0 auto;
  padding:10px 16px;
}
#ieee-validation-modal .modal-body{
  flex:1 1 auto;
  overflow:auto;
  padding:10px 14px 14px;
}
#ieee-validation-modal table.results{
  table-layout:auto;
  width:100%;
  min-width:0;
  font-size:10.5px;
}
#ieee-validation-modal table.results th,
#ieee-validation-modal table.results td{
  padding:4px 6px;
  white-space:normal !important;
  vertical-align:top;
}
#ieee-validation-modal table.results th{
  line-height:1.2;
}
#ieee-validation-modal table.results td{
  line-height:1.3;
}
#ieee-validation-modal .btn{
  padding:5px 8px;
  font-size:10.5px;
}
#ieee-validation-modal .summary-cards{
  gap:7px;
  margin-bottom:7px;
}
#ieee-validation-modal .scard{
  padding:6px 10px;
  min-width:115px;
}
#ieee-validation-modal .scard .v{
  font-size:16px;
}
#ieee-validation-modal .note-box{
  padding:6px 9px;
  margin-bottom:6px;
  line-height:1.35;
}
#ieee-validation-modal h4{
  margin:7px 0 4px;
}
#ieee-validation-modal .btn-row{
  gap:5px;
  flex-wrap:wrap;
}
@media(max-width:900px){
  #ieee-validation-modal{
    padding:4px;
  }
  #ieee-validation-modal .ieee-validation-modal-wide{
    width:calc(100vw - 8px);
    max-height:calc(100vh - 8px);
  }
  #ieee-validation-modal .modal-body{
    padding:8px;
  }
}