:root{
  --c-bg:#f4f6f8; --c-panel:#ffffff; --c-border:#dde3e8; --c-text:#1e2a33;
  --c-muted:#6b7c88; --c-primary:#1a5f7a; --c-primary-dark:#134559;
  --c-success:#1f9d55; --c-danger:#d64545; --c-warn:#e0a020;
  --c-high:#1f9d55; --c-medium:#e0a020; --c-low:#d64545;
  --c-field-border:#3b82f6; --c-field-bg:rgba(59,130,246,.10);
  --c-field-selected:#f97316; --font-ui:'Segoe UI','AppArabic',Tahoma,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{font-family:var(--font-ui);color:var(--c-text);background:var(--c-bg)}
button{font-family:inherit}
.app-shell{display:flex;flex-direction:column;height:100vh}

/* Toolbar */
.toolbar{display:flex;align-items:center;gap:10px;padding:8px 14px;background:var(--c-panel);
  border-bottom:1px solid var(--c-border);flex-wrap:wrap;z-index:20}
.toolbar-group{display:flex;align-items:center;gap:6px}
.brand{font-weight:600;color:var(--c-primary-dark);margin-inline-end:10px}
.brand-icon{font-size:20px}
.sep{width:1px;height:24px;background:var(--c-border);margin:0 4px}
.btn{background:#fff;border:1px solid var(--c-border);border-radius:8px;padding:7px 12px;
  cursor:pointer;font-size:13.5px;color:var(--c-text);transition:.12s}
.btn:hover:not(:disabled){background:#eef3f6;border-color:#c4d0d8}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--c-primary-dark)}
.btn-success{background:var(--c-success);border-color:var(--c-success);color:#fff}
.btn-success:hover:not(:disabled){background:#177c43}
.btn-lg{padding:12px 22px;font-size:15px;border-radius:10px}
.btn-icon{padding:4px 8px}
.tool-btn{width:34px;height:34px;padding:0;display:flex;align-items:center;justify-content:center}
.tool-btn.active{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
#zoomLabel{min-width:44px;text-align:center;font-size:13px;color:var(--c-muted)}
.search-box{display:flex;align-items:center;gap:4px;border:1px solid var(--c-border);border-radius:8px;padding:2px 4px;background:#fff}
.search-input{border:none;outline:none;padding:5px 8px;font-size:13px;width:160px;font-family:inherit}
.search-count{font-size:11.5px;color:var(--c-muted);min-width:44px;text-align:center}
.search-highlight{position:absolute;background:rgba(255,214,0,.55);border:1px solid #e0a800;pointer-events:none;border-radius:2px}
.search-highlight.current{background:rgba(255,140,0,.65);border-color:#c65e00}
.rubber-band{position:absolute;border:1.5px dashed #3b82f6;background:rgba(59,130,246,.12);pointer-events:none;z-index:6}

/* Status bar */
.statusbar{display:flex;align-items:center;gap:16px;padding:5px 14px;background:#eef2f4;
  border-bottom:1px solid var(--c-border);font-size:12.5px;color:var(--c-muted)}
.status-spacer{flex:1}
#statusStats span{margin-inline-start:10px}

/* Main layout */
.main-layout{flex:1;display:flex;overflow:hidden}
.panel{background:var(--c-panel);display:flex;flex-direction:column;overflow:hidden}
.panel-left{width:230px;border-inline-end:1px solid var(--c-border)}
.panel-right{width:290px;border-inline-start:1px solid var(--c-border)}
.panel-header{padding:10px 14px;font-weight:600;border-bottom:1px solid var(--c-border);font-size:13.5px}
.panel-tabs{display:flex;border-bottom:1px solid var(--c-border)}
.panel-tab{flex:1;padding:9px;background:none;border:none;cursor:pointer;font-size:13px;color:var(--c-muted);border-bottom:2px solid transparent}
.panel-tab.active{color:var(--c-primary);border-bottom-color:var(--c-primary);font-weight:600}
.panel-body{flex:1;overflow:auto;padding:10px}
.empty-hint{color:var(--c-muted);font-size:13px;text-align:center;margin-top:20px}

.page-thumb{border:2px solid transparent;border-radius:6px;margin-bottom:10px;cursor:pointer;overflow:hidden}
.page-thumb.active{border-color:var(--c-primary)}
.page-thumb img{width:100%;display:block}
.page-thumb-label{font-size:11px;text-align:center;padding:3px;color:var(--c-muted)}

.fields-filter{display:flex;gap:6px;margin-bottom:10px;flex-wrap:wrap}
.chip{border:1px solid var(--c-border);background:#fff;border-radius:999px;padding:4px 10px;font-size:11.5px;cursor:pointer}
.chip.active{background:var(--c-text);color:#fff;border-color:var(--c-text)}
.chip-high{color:var(--c-high)} .chip-medium{color:var(--c-medium)} .chip-low{color:var(--c-low)}
.fields-list{display:flex;flex-direction:column;gap:6px}
.field-row{border:1px solid var(--c-border);border-radius:6px;padding:7px 9px;cursor:pointer;font-size:12.5px}
.field-row:hover{background:#f6f9fa}
.field-row.selected{border-color:var(--c-primary);background:#eaf3f6}
.field-row .fname{font-weight:600;display:block}
.field-row .fmeta{color:var(--c-muted);font-size:11px}
.conf-badge{display:inline-block;border-radius:4px;padding:1px 6px;font-size:10.5px;font-weight:600;color:#fff;margin-inline-start:4px}
.conf-HIGH{background:var(--c-high)} .conf-MEDIUM{background:var(--c-medium)} .conf-LOW{background:var(--c-low)}

/* Canvas area */
.canvas-area{flex:1;overflow:hidden;position:relative;background:#c9d2d8}
.canvas-scroll{height:100%;overflow:auto;padding:24px;display:flex;flex-direction:column;align-items:center}
.empty-state{max-width:460px;text-align:center;margin-top:80px;color:var(--c-muted)}
.empty-state-icon{font-size:56px}
.empty-state h2{color:var(--c-text);margin:6px 0}
.pages-container{display:flex;flex-direction:column;gap:22px;align-items:center}

.page-wrap{position:relative;background:#fff;box-shadow:0 2px 14px rgba(0,0,0,.18)}
.page-wrap canvas{display:block}
.page-overlay{position:absolute;inset:0}

.field-box{position:absolute;border:1.5px solid var(--c-field-border);background:var(--c-field-bg);
  cursor:move;font-size:10px;overflow:hidden}
.field-box .flabel{position:absolute;top:-16px;right:0;background:var(--c-field-border);color:#fff;
  padding:1px 5px;border-radius:3px 3px 0 0;white-space:nowrap;pointer-events:none}
.field-box.selected{border-color:var(--c-field-selected);background:rgba(249,115,22,.14);z-index:5}
.field-box.selected .flabel{background:var(--c-field-selected)}
.field-box.conf-LOW{border-style:dashed}
.resize-handle{position:absolute;width:9px;height:9px;background:var(--c-field-selected);
  border:1px solid #fff;border-radius:2px}
.rh-se{right:-5px;bottom:-5px;cursor:se-resize}
.rh-sw{left:-5px;bottom:-5px;cursor:sw-resize}
.rh-ne{right:-5px;top:-5px;cursor:ne-resize}
.rh-nw{left:-5px;top:-5px;cursor:nw-resize}

/* Properties panel */
.prop-group{margin-bottom:14px}
.prop-label{font-size:11.5px;color:var(--c-muted);display:block;margin-bottom:4px}
.prop-input,.prop-select{width:100%;padding:6px 8px;border:1px solid var(--c-border);border-radius:6px;font-size:13px}
.prop-row{display:flex;gap:8px}
.prop-row > *{flex:1}
.prop-check{display:flex;align-items:center;gap:6px;font-size:13px;margin-bottom:8px}
.prop-actions{display:flex;gap:6px;margin-top:14px}

/* Modals */
.modal-overlay{position:fixed;inset:0;background:rgba(15,25,32,.5);display:flex;
  align-items:center;justify-content:center;z-index:100}
.modal-box{background:#fff;border-radius:12px;padding:24px;min-width:280px;text-align:center;box-shadow:0 10px 40px rgba(0,0,0,.25)}
.modal-box-lg{min-width:520px;max-width:80vw;max-height:80vh;text-align:start;display:flex;flex-direction:column;padding:0}
.modal-header{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--c-border);font-weight:600}
.modal-body{padding:16px 18px;overflow:auto}
.spinner{width:34px;height:34px;border:3px solid #dde3e8;border-top-color:var(--c-primary);
  border-radius:50%;margin:0 auto 14px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.error-box{background:#fdecec;border:1px solid #f3b8b8;color:#8a2020;border-radius:8px;padding:12px 14px;font-size:13.5px;line-height:1.6}
.summary-stats{display:flex;gap:14px;margin-bottom:14px}
.stat-card{flex:1;text-align:center;border:1px solid var(--c-border);border-radius:8px;padding:10px}
.stat-card .n{font-size:22px;font-weight:700}
.stat-card .l{font-size:11.5px;color:var(--c-muted)}

.proj-row{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--c-border);
  border-radius:8px;padding:10px 12px;margin-bottom:8px}
.proj-row .pname{font-weight:600;font-size:13.5px}
.proj-row .pmeta{font-size:11.5px;color:var(--c-muted)}