:root{
  --bg:#131417; --bg2:#1c1e22; --bg3:#252830; --panel:#1a1b1f;
  --border:#2d2d2d; --border2:#3a3c45; --text:#d4d4d4; --muted:#9b9dad;
  --accent:#47cf73; --btn:#444857; --btn-h:#5a5f73;
  --preview-bg:#444; --cm-bg:#1d1e22; --danger:#ff6b6b;
}
html[data-ui-theme="light"]{
  --bg:#f4f4f6; --bg2:#ffffff; --bg3:#e9e9ef; --panel:#f0f0f4;
  --border:#d5d5dc; --border2:#c9c9d5; --text:#232335; --muted:#6b6b7a;
  --accent:#1a9c4f; --btn:#d8d8e2; --btn-h:#c4c4d2;
  --preview-bg:#bbb; --cm-bg:#ffffff; --danger:#d92d20;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden}
body{background:var(--bg);color:var(--text);font-family:-apple-system,'Segoe UI',Roboto,Arial,sans-serif;display:flex;flex-direction:column;transition:background .2s,color .2s}

/* header */
.header{height:52px;background:#000;border-bottom:1px solid #2d2d2d;display:flex;align-items:center;padding:0 12px;gap:8px;flex-shrink:0;z-index:30}
html[data-ui-theme="light"] .header{background:#fff;border-color:#d5d5dc}
.header-left{display:flex;align-items:center;gap:10px;min-width:0}
.logo{font-size:22px;cursor:pointer;color:#fff}
html[data-ui-theme="light"] .logo{color:#222}
.pen-info{display:flex;flex-direction:column;min-width:0}
.pen-title-row{display:flex;align-items:center;gap:8px;min-width:0}
.pen-title-input{background:transparent;border:1px solid transparent;color:#fff;font-size:15px;font-weight:700;padding:2px 6px;border-radius:3px;outline:none;width:210px;max-width:26vw}
html[data-ui-theme="light"] .pen-title-input{color:#222}
.pen-title-input:focus,.pen-title-input:hover{background:#1e1e1e;border-color:#444}
html[data-ui-theme="light"] .pen-title-input:focus, html[data-ui-theme="light"] .pen-title-input:hover{background:#f0f0f5;border-color:#bbb}
.pen-title-input:disabled{opacity:.85}
.pen-author{font-size:11px;color:#9b9dad;margin-left:6px}
.header-right{margin-left:auto;display:flex;align-items:center;gap:5px;flex-wrap:wrap}
.hbtn{background:var(--btn);color:var(--text);border:none;border-radius:4px;padding:6px 11px;font-size:12.5px;font-weight:500;cursor:pointer;white-space:nowrap}
.hbtn:hover{background:var(--btn-h)}
.hbtn.green{background:var(--accent);color:#000;font-weight:600}
.hbtn:disabled{opacity:.45;cursor:not-allowed}
.save-status{font-size:11px;color:#777;min-width:60px;text-align:right}

/* settings dropdown */
.dd-wrap{position:relative}
.dd-btn{background:var(--btn);color:var(--text);border:none;border-radius:4px;padding:6px 10px;font-size:13px;cursor:pointer}
.dd-menu{position:absolute;right:0;top:calc(100% + 6px);background:var(--bg3);border:1px solid var(--border2);border-radius:8px;padding:10px;min-width:220px;display:none;z-index:90;box-shadow:0 10px 30px rgba(0,0,0,.45)}
.dd-menu.open{display:block}
.dd-menu label{font-size:11px;color:var(--muted);display:block;margin:8px 0 4px}
.dd-menu select{width:100%;background:var(--bg);border:1px solid var(--border2);color:var(--text);border-radius:5px;padding:6px 8px;font-size:12.5px}
.dd-menu .layout-btns{display:flex;gap:5px}
.dd-menu .layout-btns button{flex:1;background:var(--btn);border:1px solid var(--border2);color:var(--text);border-radius:5px;padding:5px;font-size:11px;cursor:pointer}
.dd-menu .layout-btns button.active{border-color:var(--accent);color:var(--accent);background:rgba(71,207,115,.12)}

.readonly-banner{background:var(--bg3);border-bottom:1px solid var(--border);color:var(--muted);font-size:12px;padding:4px 14px;text-align:center}
.readonly-banner a{color:var(--accent);text-decoration:none}

.main{flex:1;display:flex;overflow:hidden;min-height:0;position:relative}
.sidebar{width:220px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;z-index:20;transition:width .2s ease,border-color .2s ease;overflow:hidden}
.sidebar-toggle{position:absolute;left:220px;top:50%;transform:translate(-50%,-50%);z-index:35;width:26px;height:54px;border:1px solid var(--border2);border-radius:0 8px 8px 0;background:var(--bg3);color:var(--accent);font-size:24px;font-weight:800;line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.25);transition:left .2s ease,background .15s ease,color .15s ease,border-radius .2s ease}
.sidebar-toggle:hover{background:var(--btn-h);color:var(--text)}
.main.sidebar-collapsed .sidebar{width:0;border-right-color:transparent}
.main.sidebar-collapsed .sidebar-toggle{left:0;transform:translate(0,-50%);border-radius:0 8px 8px 0}
.sidebar-header{padding:10px 12px;font-size:11px;text-transform:uppercase;color:var(--muted);letter-spacing:.6px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border)}
.sidebar-header button{background:var(--btn);border:none;color:var(--text);cursor:pointer;font-size:18px;line-height:1;border-radius:3px;width:24px;height:24px}
.sidebar-header button:disabled{opacity:.3;cursor:not-allowed}
.project-list{overflow-y:auto;flex:1;padding:6px 0}
.project-item{padding:7px 12px;font-size:13px;cursor:pointer;border-left:3px solid transparent;display:flex;align-items:center;justify-content:space-between;gap:6px;color:var(--muted)}
.project-item:hover{background:var(--bg3)}
.project-item.active{background:var(--bg3);border-left-color:var(--accent);color:var(--text)}
.project-item .name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.project-item .del{color:#888;font-size:17px;padding:0 2px;opacity:0}
.project-item:hover .del{opacity:1}
.project-item .del:hover{color:var(--danger)}
.empty-list{padding:12px;color:var(--muted);font-size:13px}

.workspace{flex:1;display:flex;min-width:0;background:var(--bg);overflow:hidden}
.workspace.layout-top{flex-direction:column}
.workspace.layout-left{flex-direction:row}
.workspace.layout-right{flex-direction:row-reverse}

.editors-area{display:flex;background:var(--cm-bg);position:relative;overflow:hidden;flex-shrink:0}
.workspace.layout-top .editors-area{width:100%;flex-direction:row;height:46vh;min-height:200px}
.workspace.layout-left .editors-area,.workspace.layout-right .editors-area{height:100%;flex-direction:column;width:52%;min-width:280px}

.editor-pane{flex:1 1 0;display:flex;flex-direction:column;min-width:120px;min-height:120px;position:relative;overflow:hidden}
.editor-tab{height:32px;background:var(--panel);border-bottom:1px solid #00000022;display:flex;align-items:center;justify-content:space-between;padding:0 10px;flex-shrink:0;user-select:none}
.editor-tab-left{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:var(--muted)}
.ec{padding:3px 10px;width:auto;height:15px;border-radius:3px;display:inline-flex;align-items:center;justify-content:center;font-size:10px;font-weight:900;color:#000}
.ec.html{background:#ff5f56;color:#fff}
.ec.css{background:#47a3ff;color:#fff}
.ec.js{background:gold;color:#fff}
.editor-tab .note-btn{font-size:11px;color:#888;background:none;border:1px solid var(--border2);border-radius:3px;padding:1px 6px;cursor:pointer}
.editor-tab .note-btn.has-notes{color:var(--accent);border-color:var(--accent)}
.editor-body{flex:1;position:relative;overflow:hidden;min-height:80px}
.CodeMirror{height:100% !important;font-size:13px;background:var(--cm-bg) !important}
html[data-ui-theme="light"] .CodeMirror{color:#222}
.CodeMirror-gutters{background:var(--cm-bg) !important;border-right:none !important}

/* annotation marker on line numbers */
.line-note-number{display:flex;align-items:center;justify-content:flex-end;gap:3px;color:#ffbf2a;font-weight:700;cursor:pointer;padding-right:2px;text-shadow:0 0 4px rgba(255,191,42,.35)}
.line-note-number .flag{font-size:10px;color:#ffbf2a;text-shadow:0 0 4px rgba(255,191,42,.45)}

.e-resizer{background:var(--bg);z-index:5;flex-shrink:0}
.e-resizer.v{width:7px;cursor:col-resize}
.e-resizer.h{height:7px;cursor:row-resize}
.e-resizer:hover,.e-resizer.dragging{background:#3a3c47}
.splitter{background:var(--bg);z-index:10;flex-shrink:0}
.splitter.h{height:8px;cursor:row-resize;width:100%}
.splitter.v{width:8px;cursor:col-resize}
.splitter:hover,.splitter.dragging{background:#3a3c47}

/* preview */
.preview-area{flex:1 1 0;display:flex;flex-direction:column;min-width:200px;min-height:200px;background:#e8e8e8;position:relative;overflow:hidden}
.preview-toolbar{display:flex;align-items:center;gap:5px;padding:5px 8px;background:var(--bg3);border-bottom:1px solid var(--border);color:var(--muted);font-size:11.5px;flex-wrap:wrap;flex-shrink:0}
.preview-toolbar .spacer{flex:1}
.pt-btn{background:var(--btn);border:1px solid var(--border2);color:var(--text);border-radius:4px;padding:3px 8px;font-size:11.5px;cursor:pointer;white-space:nowrap}
.pt-btn:hover{background:var(--btn-h)}
.pt-btn.active{background:rgba(71,207,115,.15);border-color:var(--accent);color:var(--accent)}
.pt-btn:disabled{opacity:.38;cursor:not-allowed}
.pt-size{background:var(--bg);border:1px solid var(--border2);color:var(--text);border-radius:4px;padding:3px 6px;font-size:11.5px;width:64px}
.dev-orient-group{display:flex;border:1px solid var(--border2);border-radius:4px;overflow:hidden}
.dev-orient-group button{border:none;background:var(--btn);color:var(--text);padding:3px 9px;font-size:13px;cursor:pointer}
.dev-orient-group button+button{border-left:1px solid var(--border2)}
.dev-orient-group button.active{background:rgba(71,207,115,.18);color:var(--accent)}
.dev-orient-group button:disabled{opacity:.35;cursor:not-allowed}
.preview-frame-wrap{flex:1;position:relative;overflow:auto;background:var(--preview-bg);display:flex;justify-content:center;align-items:flex-start;padding:18px;min-height:120px}
#preview{background:#fff;border:none;display:block;box-shadow:0 4px 30px rgba(0,0,0,.35);flex-shrink:0}
.preview-frame-wrap.full #preview{width:100% !important;height:100% !important;box-shadow:none}
.preview-frame-wrap.full{padding:0}

.error-console{position:absolute;left:10px;right:10px;bottom:10px;background:#2b1a1a;border:1px solid #6d2a2a;color:#ffb8b8;border-radius:6px;padding:8px 11px;font-size:12px;font-family:ui-monospace,Consolas,monospace;max-height:140px;overflow:auto;display:none;z-index:15}
.error-console.open{display:block}
.error-console b{color:#ff6b6b}
.error-console .ec-close{float:right;cursor:pointer;padding:0 4px}
.error-console pre{white-space:pre-wrap;margin:4px 0 0}

@media(max-width:900px){ .pen-title-input{width:130px}.project-category-select{max-width:115px;font-size:10.5px;padding-left:8px} .hbtn span.hide-sm{display:none} .sidebar{width:210px} .sidebar-toggle{left:210px} .main.sidebar-collapsed .sidebar-toggle{left:0} }

/* toast */
#toastStack{position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;gap:8px;z-index:200}
.toast{background:#252830;color:#e6e6e6;border:1px solid #3a3c45;border-radius:8px;padding:10px 14px;font-size:13px;box-shadow:0 8px 30px rgba(0,0,0,.45);min-width:200px;max-width:360px;animation:toastIn .18s ease;opacity:.97}
html[data-ui-theme="light"] .toast{background:#fff;color:#222;border-color:#ccc;box-shadow:0 8px 30px rgba(0,0,0,.18)}
.toast.ok{border-left:3px solid var(--accent)}
.toast.err{border-left:3px solid var(--danger)}
@keyframes toastIn{from{transform:translateY(8px);opacity:0}to{transform:none;opacity:.97}}
@keyframes toastOut{to{opacity:0;transform:translateY(6px)}}

/* modals */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:100}
.modal-backdrop.open{display:flex}
.modal{background:var(--bg3);border:1px solid var(--border2);border-radius:10px;padding:22px 24px;width:100%;color:var(--text);box-shadow:0 20px 60px rgba(0,0,0,.5)}
.modal h3{font-size:16px;margin-bottom:14px}
.modal label{font-size:12px;color:var(--muted);display:block;margin-bottom:5px}
.modal input[type=text], .modal textarea, .modal select{width:100%;background:var(--bg);border:1px solid var(--border2);color:var(--text);border-radius:6px;padding:9px 11px;font-size:13px;outline:none;font-family:inherit}
.modal textarea{min-height:120px;resize:vertical}
.share-url-row{display:flex;gap:8px;margin-bottom:12px}
.share-url-row input{flex:1}
.copy-btn{background:var(--btn);color:var(--text);border:none;border-radius:6px;padding:9px 14px;font-size:13px;cursor:pointer;white-space:nowrap}
.copy-btn.copied{background:#1a5c35;color:#fff}
.modal-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;margin-top:14px}
.mbtn{background:var(--btn);color:var(--text);border:none;border-radius:6px;padding:8px 14px;font-size:13px;cursor:pointer}
.mbtn.primary{background:var(--accent);color:#000;font-weight:600}
.mbtn.danger{background:#c73838;color:#fff}
.share-hint{font-size:12px;color:var(--muted);margin-top:10px}
.rev-list{max-height:360px;overflow:auto;border:1px solid var(--border2);border-radius:6px;background:var(--bg)}
.rev-item{padding:10px 12px;border-bottom:1px solid var(--border);font-size:13px;display:flex;align-items:center;gap:10px}
.rev-item:last-child{border-bottom:none}
.rev-item small{color:var(--muted)}
.rev-item .rbtn{margin-left:auto;background:var(--btn);border:1px solid var(--border2);color:var(--text);border-radius:5px;padding:4px 10px;font-size:12px;cursor:pointer}
.rev-item .rbtn.restore{background:var(--accent);color:#000;border-color:transparent;font-weight:600}

.annot-pop{position:absolute;background:var(--bg3);border:1px solid var(--border2);border-radius:8px;padding:10px;z-index:50;box-shadow:0 10px 30px rgba(0,0,0,.4);width:260px}
.annot-pop textarea{width:100%;height:70px;background:var(--bg);border:1px solid var(--border2);color:var(--text);border-radius:5px;padding:6px;font-size:12.5px;font-family:inherit;resize:vertical}
.annot-pop .ap-actions{display:flex;gap:6px;justify-content:flex-end;margin-top:7px}
.annot-pop button{background:var(--btn);border:none;color:var(--text);border-radius:4px;padding:4px 9px;font-size:12px;cursor:pointer}
.annot-pop button.save{background:var(--accent);color:#000;font-weight:600}.logo{text-decoration:none}
.role-badge{color:var(--accent);font-size:10px;background:rgba(71,207,115,.12);padding:1px 5px;border-radius:2px;margin-left:4px}
.settings-reset-row{margin-top:10px;display:flex;gap:6px}
.reset-layout-btn{flex:1;background:var(--btn);border:1px solid var(--border2);color:var(--text);border-radius:5px;padding:5px}
.no-underline{text-decoration:none}
.modal-share{max-width:480px}
.modal-history{max-width:620px}
.modal-notes{max-width:560px}
.muted-pad{padding:12px;color:var(--muted)}
.rev-save-row{display:flex;gap:8px;margin-top:12px;align-items:center}
.rev-note-input{flex:1;background:var(--bg);border:1px solid var(--border2);color:var(--text);border-radius:6px;padding:8px 10px}
.notes-help{font-size:12px;color:var(--muted);margin-top:8px}
.db-error{color:#ff6b6b}
.toolbar-sep{width:1px;height:16px;background:var(--border2);margin:0 4px;display:inline-block}
.toolbar-sep.small{margin:0 2px}
.dim-sep{color:#888}
.device-select{width:auto;min-width:165px}
.annot-line-title{font-size:11px;color:var(--muted);margin-bottom:4px}

body.is-resizing{cursor:grabbing;user-select:none}
body.is-resizing iframe{pointer-events:none}
body.is-resizing .CodeMirror{pointer-events:none}
.project-category-select{height:24px;max-width:150px;background:linear-gradient(180deg,var(--bg3),var(--bg2));border:1px solid var(--border2);color:var(--text);border-radius:999px;padding:2px 24px 2px 10px;font-size:11.5px;outline:none;cursor:pointer;box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}
.project-category-select:hover,.project-category-select:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(71,207,115,.12)}
.project-category-select:disabled{opacity:.7;cursor:default}
.sidebar-tools{padding:8px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:6px}
.sidebar-select{width:100%;background:var(--bg);border:1px solid var(--border2);color:var(--text);border-radius:5px;padding:6px 7px;font-size:12px}
.side-tool-btn{background:var(--btn);border:1px solid var(--border2);color:var(--text);border-radius:5px;padding:5px 7px;font-size:12px;cursor:pointer;text-align:left}
.side-tool-btn:hover,.side-tool-btn.active{background:rgba(71,207,115,.14);border-color:var(--accent);color:var(--accent)}
.project-item .cat-pill{font-size:10px;color:var(--muted);background:rgba(155,157,173,.12);border:1px solid var(--border2);border-radius:999px;padding:1px 5px;max-width:82px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex-shrink:0}
.project-item .restore{color:var(--accent);font-size:16px;padding:0 3px;opacity:.7;cursor:pointer}
.project-item:hover .restore{opacity:1}
.project-item .purge{color:var(--danger);opacity:.65}
#errorConsole b{display:block;margin-bottom:2px}