*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
*{scrollbar-width:thin;scrollbar-color:var(--border2) transparent}
:root{
  --bg:#0a0a0c;
  --bg-soft:#141416;
  --surface:#1a1a1e;
  --surface2:#242428;
  --surface3:#2a2a30;
  --border:#2e2e34;
  --border2:#3a3a42;
  --accent:#3b82f6;
  --accent-hover:#2563eb;
  --text:#f5f5f7;
  --text-muted:#9a9aa0;
  --text-faint:#6b6b72;
  --success:#22c55e;
  --danger:#ef4444;
  --warning:#f59e0b;
  --sidebar-width:360px;
  --radius:14px;
  --radius-sm:10px;
}
html,body{height:100%;overflow:hidden}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);color:var(--text);
  height:100vh;display:flex;flex-direction:column;
}
/* Header - mimic Whirl top bar: minimal, dark */
header{
  background:var(--bg);border-bottom:1px solid var(--border);
  padding:12px 20px;display:flex;align-items:center;gap:12px;
  position:sticky;top:0;z-index:100;
}
.app-footer{text-align:center;padding:10px;font-size:11px;color:var(--text-faint);border-top:1px solid var(--border);background:var(--bg);letter-spacing:0.02em}
.app-footer strong{color:var(--text-muted);font-weight:700}
header .logo-img{width:36px;height:36px;object-fit:contain;border-radius:8px;background:#fff;padding:2px;border:1px solid var(--border)}
.header-text{display:flex;flex-direction:column;line-height:1.1}
.header-text h1{font-size:15px;font-weight:800;letter-spacing:-0.02em}
.header-text span{font-size:11px;color:var(--text-muted)}
.header-hint{font-size:11px;color:var(--text-faint);margin-left:8px}
header h1{font-size:14px;font-weight:700;letter-spacing:-0.02em}
header span{font-size:12px;color:var(--text-muted)}


/* Layout with gap like Whirl card layout */
.app{display:flex;flex:1;overflow:hidden;gap:12px;padding:12px;background:var(--bg);height:calc(100vh - 57px)}
.sidebar{
  width:var(--sidebar-width);min-width:var(--sidebar-width);
  background:var(--bg-soft);border:1px solid var(--border);
  border-radius:var(--radius);overflow-y:auto;display:flex;flex-direction:column;
}
.sidebar{scrollbar-width:thin;scrollbar-color:transparent transparent}
.sidebar:hover{scrollbar-color:var(--border2) transparent}
.sidebar::-webkit-scrollbar{width:5px}
.sidebar::-webkit-scrollbar-track{background:transparent}
.sidebar::-webkit-scrollbar-thumb{background:transparent;border-radius:99px}
.sidebar:hover::-webkit-scrollbar-thumb{background:var(--border2)}
.sidebar::-webkit-scrollbar-thumb:hover{background:var(--text-faint)}
/* global overlay scrollbars */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:99px;border:1px solid transparent;background-clip:padding-box}
::-webkit-scrollbar-thumb:hover{background:var(--text-faint)}
.section{padding:16px 16px;border-bottom:1px solid var(--border)}
.section:last-child{border-bottom:none}
.section-title{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:0.1em;color:var(--text-muted);margin-bottom:12px;display:flex;align-items:center;gap:6px}
.section-title svg{opacity:0.6}
.field{margin-bottom:12px}
.field:last-child{margin-bottom:0}
label{display:block;font-size:11px;color:var(--text-muted);margin-bottom:6px;font-weight:500}
input[type="text"],input[type="number"],input[type="email"],input[type="password"],textarea{
  width:100%;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--text);
  padding:9px 11px;font-size:13px;font-family:inherit;outline:none;transition:border-color 0.15s;
}
input:focus,textarea:focus{border-color:var(--accent)}
textarea{resize:vertical;min-height:90px;line-height:1.6}
.row{display:flex;gap:8px}.row .field{flex:1}
.color-row{display:flex;align-items:center;gap:8px}
input[type="color"]{width:36px;height:36px;padding:3px;border:1px solid var(--border);border-radius:10px;background:var(--surface);cursor:pointer;flex-shrink:0}
.btn-group{display:flex;gap:6px}
.toggle-btn{
  flex:1;background:var(--surface);border:1px solid var(--border);color:var(--text-muted);
  border-radius:10px;padding:7px 8px;font-size:13px;cursor:pointer;transition:all 0.15s;
}
.toggle-btn:hover{border-color:var(--border2);color:var(--text)}
.toggle-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}
.pos-display{display:flex;gap:8px}
.pos-badge{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:7px 10px;font-size:11px;color:var(--text-muted);flex:1;text-align:center;font-variant-numeric:tabular-nums}
.pos-badge span{color:var(--text);font-weight:700}
.name-count{display:inline-flex;align-items:center;background:var(--accent);color:#fff;border-radius:20px;padding:2px 8px;font-size:11px;font-weight:700;margin-left:auto}
.switch-row{display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none;font-size:12px;color:var(--text)}
.switch-track{position:relative;width:38px;height:22px;background:var(--surface);border:1px solid var(--border);border-radius:99px;flex-shrink:0;transition:all 0.2s}
.switch-track input{display:none}
.switch-thumb{position:absolute;top:2px;left:2px;width:16px;height:16px;background:var(--text-muted);border-radius:50%;transition:all 0.2s}
.switch-track:has(input:checked){background:var(--accent);border-color:var(--accent)}
.switch-track:has(input:checked) .switch-thumb{transform:translateX(16px);background:#fff}
.shadow-controls{margin-top:12px;display:flex;flex-direction:column;gap:0;overflow:hidden;max-height:0;opacity:0;transition:max-height 0.25s,opacity 0.2s}
.shadow-controls.visible{max-height:240px;opacity:1}
.slider-row{display:flex;align-items:center;gap:10px}
input[type="range"]{flex:1;accent-color:var(--accent);height:4px;cursor:pointer}
.slider-val{font-size:12px;color:var(--text);font-weight:600;min-width:34px;text-align:right}
.font-picker{position:relative}
.font-trigger{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--text);padding:10px 12px;font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:8px;transition:border-color 0.15s}
.font-trigger:hover,.font-trigger.open{border-color:var(--accent)}
.font-dropdown{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--surface2);border:1px solid var(--border);border-radius:12px;max-height:300px;overflow-y:auto;z-index:300;display:none;box-shadow:0 16px 40px rgba(0,0,0,0.5);padding:6px 0}
.font-dropdown.open{display:block}
.font-category-label{font-size:9px;font-weight:800;text-transform:uppercase;letter-spacing:0.12em;color:var(--text-muted);padding:10px 14px 4px}
.font-item{padding:8px 14px;cursor:pointer;font-size:16px;color:var(--text);display:flex;align-items:center;justify-content:space-between}
.font-item:hover{background:var(--surface3)}
.font-item.active{color:var(--accent);background:rgba(59,130,246,0.12)}
.font-item-check{width:14px;height:14px;flex-shrink:0;opacity:0}
.font-item.active .font-item-check{opacity:1}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:10px 16px;border:none;border-radius:10px;font-size:13px;font-weight:600;cursor:pointer;transition:all 0.15s;font-family:inherit}
.btn-outline{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-outline:hover{border-color:var(--text-muted);background:var(--surface2)}
.btn-success{background:var(--accent);color:#fff}
.btn-success:hover{background:var(--accent-hover)}
.btn:disabled{opacity:0.35;cursor:not-allowed}
.btn-group-action{display:flex;flex-direction:column;gap:8px}
.progress-wrap{display:none;flex-direction:column;gap:6px;margin-top:8px}
.progress-wrap.visible{display:flex}
.progress-bar-track{background:var(--surface);border-radius:99px;height:6px;overflow:hidden}
.progress-bar-fill{background:var(--accent);height:100%;border-radius:99px;width:0%;transition:width 0.2s}
.progress-label{font-size:11px;color:var(--text-muted);text-align:center}
.canvas-wrap{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:16px;padding:20px;overflow:auto;position:relative;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius)}
.canvas-container{position:relative;display:inline-block;box-shadow:0 12px 40px rgba(0,0,0,0.4);border-radius:12px;overflow:hidden;cursor:crosshair;background:#fff}
#previewCanvas{display:block}
.canvas-hint{font-size:11px;color:var(--text-muted);display:flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--border);padding:8px 12px;border-radius:20px}
.zoom-controls{position:absolute;bottom:16px;right:16px;display:flex;gap:6px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:4px}
.zoom-btn{width:30px;height:30px;background:transparent;border:none;border-radius:8px;color:var(--text);font-size:16px;cursor:pointer;display:grid;place-items:center}
.zoom-btn:hover{background:var(--surface2)}
.zoom-level{color:var(--text-muted);font-size:11px;display:grid;place-items:center;padding:0 8px;min-width:44px}
#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:10px 18px;border-radius:10px;font-size:12px;opacity:0;pointer-events:none;transition:all 0.25s;z-index:999}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.upload-area{position:relative;border:1px dashed var(--border2);border-radius:12px;padding:16px;text-align:center;cursor:pointer;transition:all 0.2s;background:var(--surface)}
.upload-area:hover,.upload-area.drag-over{border-color:var(--accent);background:rgba(59,130,246,0.08)}
.upload-area input[type="file"]{position:absolute;inset:0;opacity:0;width:100%;height:100%;cursor:pointer;z-index:1}
.upload-inner{display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none}
.upload-inner svg{color:var(--text-muted)}
.upload-inner span{font-size:11px;color:var(--text-muted)}
.excel-preview-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-size:11px;color:var(--text-muted)}
.excel-table-wrap{overflow:auto;max-height:260px;border-radius:10px;border:1px solid var(--border);background:var(--surface)}
.excel-table{width:100%;border-collapse:collapse;font-size:12px}
.excel-table th{background:var(--surface2);color:var(--text-muted);font-size:10px;letter-spacing:0.06em;text-transform:uppercase;font-weight:700;padding:7px 10px;text-align:left;border-bottom:1px solid var(--border)}
.excel-table td{padding:6px 10px;border-bottom:1px solid var(--border);color:var(--text);white-space:nowrap;max-width:160px;overflow:hidden;text-overflow:ellipsis}
.excel-table tbody tr:hover{background:var(--surface2)}
.chip-btn{border:none;border-radius:20px;padding:4px 10px;font-size:11px;font-weight:600;cursor:pointer}
.chip-btn.danger{background:rgba(239,68,68,0.12);color:var(--danger)}
.smtp-status-badge{margin-left:auto;font-size:9px;font-weight:700;padding:2px 7px;border-radius:20px}
.smtp-status-badge.configured{background:rgba(34,197,94,0.14);color:var(--success)}
.smtp-status-badge.unconfigured{background:var(--surface);color:var(--text-muted)}
.field-hint{font-size:11px;color:var(--text-muted);margin-top:4px;line-height:1.5}
.var-chips{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:6px}
.var-chip{background:rgba(59,130,246,0.12);color:var(--accent);border:1px solid rgba(59,130,246,0.3);border-radius:20px;padding:3px 9px;font-size:11px;font-family:monospace;font-weight:600;cursor:pointer}
.var-chip:hover{background:var(--accent);color:#fff}
.btn-email{background:var(--accent);color:#fff}
.btn-email:hover{background:var(--accent-hover)}
.email-log{max-height:160px;overflow-y:auto;border:1px solid var(--border);border-radius:10px;background:var(--surface);padding:6px;display:flex;flex-direction:column;gap:3px}
.log-row{display:flex;align-items:center;gap:6px;font-size:11px;padding:3px 4px}
.log-row.ok{color:var(--success)}.log-row.fail{color:var(--danger)}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);backdrop-filter:blur(6px);z-index:1000;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity 0.2s;padding:16px}
.modal-overlay.open{opacity:1;pointer-events:all}
.modal{background:var(--surface2);border:1px solid var(--border);border-radius:16px;width:480px;max-width:100%;max-height:calc(100vh - 48px);display:flex;flex-direction:column;overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,0.6);transform:translateY(10px);transition:transform 0.2s}
.modal-overlay.open .modal{transform:translateY(0)}
.modal-wide{width:660px}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--border);flex-shrink:0}
.modal-title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--text)}
.modal-close{width:28px;height:28px;background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--text-muted);font-size:16px;cursor:pointer;display:grid;place-items:center}
.modal-close:hover{border-color:var(--danger);color:var(--danger)}
.modal-body{padding:20px;overflow-y:auto;flex:1}
.modal-footer{padding:14px 20px;border-top:1px solid var(--border);display:flex;gap:8px;justify-content:flex-end}
.modal-footer .btn{width:auto;padding:9px 18px}
.rich-toolbar{display:flex;align-items:center;gap:2px;padding:6px 8px;background:var(--surface);border:1px solid var(--border);border-bottom:none;border-radius:10px 10px 0 0;flex-wrap:wrap}
.rich-btn{background:transparent;border:1px solid transparent;border-radius:7px;color:var(--text);cursor:pointer;font-size:13px;min-width:28px;height:28px;padding:0 6px;display:inline-flex;align-items:center;justify-content:center}
.rich-btn:hover{background:var(--surface2);border-color:var(--border)}.rich-btn.active{background:var(--accent);color:#fff}
.rich-divider{width:1px;height:20px;background:var(--border);margin:0 4px}
.email-body-editor{min-height:260px;padding:12px 14px;background:var(--surface);border:1px solid var(--border);border-radius:0 0 10px 10px;color:var(--text);font-size:14px;line-height:1.65;outline:none;white-space:pre-wrap}
.email-body-editor:focus{border-color:var(--accent)}
.email-body-editor:empty::before{content:attr(data-placeholder);color:var(--text-muted);pointer-events:none;white-space:pre-line}
.template-select{background:var(--surface);border:1px solid var(--border);border-radius:7px;color:var(--text);font-size:11px;padding:0 6px;height:28px;max-width:150px}
.btn-done{background:var(--accent);color:#fff}
.compose-btn{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.compose-btn:hover{border-color:var(--accent);color:var(--accent)}
.compose-summary{font-size:10px;color:var(--text-muted);padding:6px 10px;background:var(--surface);border:1px solid var(--border);border-radius:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.var-chip-hint{font-size:11px;color:var(--text-muted);font-style:italic}
.column-chips{display:flex;flex-wrap:wrap;gap:6px}
.col-chip{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--border);color:var(--text);border-radius:20px;padding:6px 11px;font-size:12px;font-weight:500;cursor:grab;user-select:none;transition:all 0.15s}
.col-chip:hover{border-color:var(--accent);background:rgba(59,130,246,0.12);color:var(--accent)}
.col-chip.dragging{opacity:0.4}
.active-field-label{margin-left:auto;font-size:9px;font-weight:700;padding:3px 8px;border-radius:20px;background:var(--surface);color:var(--text-muted);max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.active-field-label.has-field{background:var(--accent);color:#fff}
.btn-remove-field{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;margin-top:10px;padding:8px 14px;border:1px solid rgba(239,68,68,0.3);border-radius:10px;background:rgba(239,68,68,0.08);color:var(--danger);font-size:11px;font-weight:700;cursor:pointer}
.btn-remove-field:hover{background:var(--danger);color:#fff}
#previewCanvas.drop-over{outline:2px dashed var(--accent);outline-offset:-2px}
.row-indicator{display:flex;align-items:center;gap:8px;background:rgba(59,130,246,0.12);border:1px solid rgba(59,130,246,0.3);border-radius:10px;padding:8px 12px;font-size:11px;color:var(--accent);width:100%;max-width:800px}
.row-indicator-btn{display:inline-flex;align-items:center;gap:5px;background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:10px;font-weight:600;padding:4px 10px;cursor:pointer}
.row-indicator-btn:hover{border-color:var(--accent);color:var(--accent)}
.row-indicator-btn.danger{color:var(--danger)}
.excel-table tbody tr[data-row-idx]{cursor:pointer}
.excel-table tbody tr.active{background:rgba(59,130,246,0.14) !important}
.excel-table tbody tr.active td{color:var(--accent)}
.excel-table tbody tr.customized td:first-child::after{content:'✦';margin-left:5px;color:var(--warning);font-size:9px}
.cert-drop-zone{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:10;cursor:pointer}
.cert-drop-zone input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer;z-index:1}
.cert-drop-inner{display:flex;flex-direction:column;align-items:center;gap:10px;padding:44px 48px;border:1.5px dashed var(--border2);border-radius:16px;text-align:center;transition:all 0.2s;pointer-events:none;max-width:400px;background:var(--surface)}
.cert-drop-zone:hover .cert-drop-inner,.cert-drop-zone.drag-active .cert-drop-inner{border-color:var(--accent);background:rgba(59,130,246,0.06)}
.cert-drop-icon{color:var(--text-muted);opacity:0.5}
.cert-drop-title{font-size:15px;font-weight:700;color:var(--text)}
.cert-drop-sub{font-size:12px;color:var(--text-muted);margin-top:-4px}
.cert-drop-formats{font-size:10px;color:var(--text-faint);letter-spacing:0.08em}
.change-template-btn{display:none;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--text-muted);font-size:11px;padding:7px 12px;cursor:pointer;z-index:5}
.header-change-btn{margin-left:auto}
.change-template-btn:hover{border-color:var(--accent);color:var(--accent)}
.change-template-btn.visible{display:flex}
.smtp-test-result{display:flex;gap:7px;font-size:12px;padding:8px 10px;border-radius:8px;margin-top:8px}
.smtp-test-result.success{background:rgba(34,197,94,0.08);border:1px solid rgba(34,197,94,0.25);color:var(--success)}
.smtp-test-result.fail{background:rgba(239,68,68,0.08);border:1px solid rgba(239,68,68,0.25);color:var(--danger)}
.btn-test{background:var(--surface);color:var(--text-muted);border:1px solid var(--border)}
.btn-test:hover{border-color:var(--accent);color:var(--text)}

/* Mobile */
.mobile-menu-btn{display:none;width:36px;height:36px;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--text);cursor:pointer;flex-shrink:0}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:90;opacity:0;transition:opacity 0.2s}
.sidebar-overlay.open{display:block;opacity:1}

@media(max-width:900px){
  .header-hint{display:none}
  :root{--sidebar-width:320px}
}
@media(max-width:768px){
  html,body{height:auto;overflow:auto}
  body{height:auto;min-height:100vh}
  header{padding:10px 12px;gap:8px;flex-wrap:wrap}
  .header-text span{font-size:10px}
  .mobile-menu-btn{display:none !important}
  .sidebar-overlay{display:none !important}
  .app{flex-direction:column;height:auto;overflow:visible;padding:8px}
  .canvas-wrap{order:1;width:100%;min-height:320px;padding:12px}
  .sidebar{order:2;width:100%;min-width:0;max-height:none;transform:none;position:static;border-radius:var(--radius)}
  .canvas-container{max-width:100%}
  #previewCanvas{max-width:100%;height:auto}
  .cert-drop-inner{padding:28px 20px}
  .zoom-controls{position:static;margin-top:4px}
  .modal{width:100%}
  .modal-wide{width:100%}
}
@media(max-width:480px){
  .row{flex-direction:column}
  .cert-drop-title{font-size:13px}
  .header-change-btn{font-size:10px;padding:6px 8px}
}