:root{--bg: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #1c2128;--border: #30363d;--text: #e6edf3;--text-muted: #8b949e;--accent: #58a6ff;--green: #57F287;--yellow: #FEE75C;--red: #ED4245;--orange: #FF9933}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);overflow:hidden}.app{display:flex;flex-direction:column;height:100vh}.header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border);flex-shrink:0}.header-left{display:flex;align-items:center;gap:10px}.header-left h1{font-size:16px;font-weight:600}.header-subtitle{font-size:12px;color:var(--text-muted)}.header-right{display:flex;gap:8px}.btn{display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:6px;border:1px solid var(--border);background:var(--bg-tertiary);color:var(--text);font-size:13px;cursor:pointer;transition:all .15s}.btn:hover{border-color:var(--accent);color:var(--accent)}.btn-primary{background:#238636;border-color:#238636;color:#fff}.btn-primary:hover{background:#2ea043;border-color:#2ea043;color:#fff}.templates-bar{padding:12px 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border);flex-shrink:0}.templates-grid{display:flex;gap:10px;overflow-x:auto}.template-card{display:flex;flex-direction:column;gap:4px;padding:10px 14px;border-radius:8px;border:1px solid var(--border);background:var(--bg-tertiary);color:var(--text);cursor:pointer;min-width:180px;text-align:left;transition:all .15s}.template-card:hover{border-color:var(--accent)}.template-card strong{font-size:13px}.template-card span{font-size:11px;color:var(--text-muted)}.main{display:flex;flex:1;overflow:hidden}.sidebar{width:220px;flex-shrink:0;background:var(--bg-secondary);border-right:1px solid var(--border);overflow-y:auto}.file-tree{padding:8px 0}.tree-header{display:flex;align-items:center;justify-content:space-between;padding:6px 12px;font-size:11px;text-transform:uppercase;color:var(--text-muted);font-weight:600;letter-spacing:.5px}.tree-actions{display:flex;gap:4px}.tree-actions button{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:2px;border-radius:4px}.tree-actions button:hover{color:var(--text);background:var(--bg-tertiary)}.tree-item{display:flex;align-items:center;gap:6px;padding:4px 12px;font-size:13px;cursor:pointer;color:var(--text-muted);position:relative}.tree-item:hover{background:var(--bg-tertiary);color:var(--text)}.tree-item.active{background:var(--bg-tertiary);color:var(--accent)}.tree-children{padding-left:12px}.tree-delete{position:absolute;right:8px;background:none;border:none;color:var(--text-muted);cursor:pointer;opacity:0;padding:2px;border-radius:3px}.tree-item:hover .tree-delete{opacity:1}.tree-delete:hover{color:var(--red)}.editor-pane{flex:1;display:flex;flex-direction:column;min-width:0}.editor-tab-bar{display:flex;background:var(--bg-secondary);border-bottom:1px solid var(--border);flex-shrink:0}.editor-tab{display:flex;align-items:center;gap:6px;padding:8px 16px;font-size:13px;color:var(--text-muted);border-bottom:2px solid transparent}.editor-tab.active{color:var(--text);border-bottom-color:var(--accent);background:var(--bg)}.right-panel{width:340px;flex-shrink:0;background:var(--bg-secondary);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.right-tabs{display:flex;border-bottom:1px solid var(--border);flex-shrink:0}.right-tabs button{flex:1;display:flex;align-items:center;justify-content:center;gap:4px;padding:8px;font-size:12px;background:none;border:none;color:var(--text-muted);cursor:pointer;border-bottom:2px solid transparent}.right-tabs button:hover{color:var(--text)}.right-tabs button.active{color:var(--accent);border-bottom-color:var(--accent)}.right-content{flex:1;overflow-y:auto;padding:12px}.validation-panel{display:flex;flex-direction:column;gap:16px}.grade-badge{display:flex;align-items:center;gap:12px;padding:16px;border-radius:10px;color:#000}.grade-letter{font-size:36px;font-weight:800}.grade-score{font-size:16px;font-weight:600}.val-section h3{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:600;margin-bottom:8px;color:var(--text)}.val-item{display:flex;align-items:flex-start;gap:6px;padding:4px 8px;border-radius:4px;font-size:12px;margin-bottom:4px}.val-error{background:#ed424526;color:#f97583}.val-warning{background:#fee75c1a;color:#e3b341}.val-info{background:#58a6ff1a;color:var(--accent)}.val-pass{background:#57f2871a;color:var(--green)}.val-info-msg{color:var(--text-muted);text-align:center;padding:40px 0;font-size:13px}.progress-bar{height:6px;background:var(--bg);border-radius:3px;margin-bottom:8px;overflow:hidden}.progress-fill{height:100%;background:var(--green);border-radius:3px;transition:width .3s}.preview-meta{padding:16px;background:var(--bg-tertiary);border-radius:8px;margin-bottom:16px}.preview-meta h2{font-size:18px;margin-bottom:4px}.preview-desc{font-size:13px;color:var(--text-muted);margin-bottom:8px}.preview-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.tag{padding:2px 8px;border-radius:12px;font-size:11px;background:#58a6ff26;color:var(--accent)}.tag-version{background:#57f28726;color:var(--green)}.tag-author{background:#fee75c1a;color:#e3b341}.preview-perms{font-size:12px;color:var(--text-muted)}.preview-body{font-size:14px;line-height:1.6}.preview-body h1,.preview-body h2,.preview-body h3{margin:16px 0 8px}.preview-body ul,.preview-body ol{padding-left:20px}.preview-body li{margin-bottom:4px}.preview-body code{background:var(--bg-tertiary);padding:2px 6px;border-radius:4px;font-size:13px}.preview-body pre{background:var(--bg-tertiary);padding:12px;border-radius:6px;overflow-x:auto;margin:8px 0}.preview-body pre code{background:none;padding:0}.preview-body table{width:100%;border-collapse:collapse;margin:8px 0}.preview-body th,.preview-body td{padding:6px 10px;border:1px solid var(--border);font-size:13px;text-align:left}.preview-body th{background:var(--bg-tertiary)}.test-harness h3{display:flex;align-items:center;gap:6px;font-size:14px;margin-bottom:4px}.test-help{font-size:11px;color:var(--text-muted);margin-bottom:12px}.test-case{display:flex;flex-direction:column;gap:6px;padding:10px;background:var(--bg-tertiary);border-radius:6px;margin-bottom:8px}.test-case input{width:100%;padding:6px 10px;border-radius:4px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:13px}.test-case input:focus{outline:none;border-color:var(--accent)}.test-actions{display:flex;gap:6px}.test-actions button{padding:4px 12px;border-radius:4px;border:1px solid var(--border);background:var(--bg-secondary);color:var(--text);font-size:12px;cursor:pointer}.test-actions button:hover{border-color:var(--accent)}.btn-danger{color:var(--red)!important}.btn-danger:hover{border-color:var(--red)!important}.test-result{padding:8px;border-radius:4px;font-size:12px}.test-result.pass{background:#57f2871a}.test-result.fail{background:#ed42451a}.btn-add-test{width:100%;padding:8px;border-radius:6px;border:1px dashed var(--border);background:none;color:var(--text-muted);font-size:12px;cursor:pointer}.btn-add-test:hover{border-color:var(--accent);color:var(--accent)}.simulate-panel h3{display:flex;align-items:center;gap:6px;font-size:14px;margin-bottom:12px}.sim-section{margin-bottom:16px}.sim-section h4{font-size:12px;color:var(--text-muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}.sim-item{display:flex;align-items:center;gap:6px;font-size:13px;padding:2px 0}.sim-step{font-size:13px;padding:2px 0;color:var(--text-muted)}.dim{font-size:12px;color:var(--text-muted);font-style:italic}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}