:root{--bg:#f8f9fa;--surface:#fff;--text:#1a1a2e;--text-muted:#6c757d;--border:#dee2e6;--accent:#6366f1;--accent-hover:#4f46e5;--error:#ef4444;--error-bg:#ef444414;--warning:#f59e0b;--warning-bg:#f59e0b14;--success:#22c55e;--success-bg:#22c55e14;--radius:8px;--viewer-bg:#1e1e2e;--viewer-line-nr:#6c7086;--viewer-tag:#89b4fa;--viewer-attr:#a6e3a1;--viewer-value:#f9e2af;--viewer-text:#cdd6f4;--viewer-error-bg:#ef444426;--viewer-error-border:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}.upload-tabs{border-bottom:2px solid var(--border);gap:0;margin-bottom:16px;display:flex}.upload-tab{cursor:pointer;color:var(--text-muted);background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-2px;padding:8px 20px;font-size:14px;font-weight:500}.upload-tab[data-active=true]{color:var(--accent);border-bottom-color:var(--accent)}.upload-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);text-align:center;cursor:pointer;padding:48px 24px;transition:border-color .2s,background .2s}.dropzone:hover,.dropzone[data-dragover=true]{border-color:var(--accent);background:#6366f10a}.dropzone p{color:var(--text-muted);font-size:14px}.dropzone .browse-btn{color:var(--accent);cursor:pointer;font-weight:600;text-decoration:underline}.file-info{background:var(--bg);border-radius:var(--radius);align-items:center;gap:12px;padding:12px;font-size:14px;display:flex}.file-info .filename{font-weight:600}.file-info .filesize{color:var(--text-muted)}.paste-area{border:1px solid var(--border);border-radius:var(--radius);resize:vertical;background:var(--surface);width:100%;min-height:200px;color:var(--text);padding:12px;font-family:SF Mono,Fira Code,monospace;font-size:13px}.validate-btn{background:var(--accent);color:#fff;border-radius:var(--radius);cursor:pointer;border:none;width:100%;margin-top:16px;padding:12px;font-size:16px;font-weight:600;transition:background .2s;display:block}.validate-btn:hover:not(:disabled){background:var(--accent-hover)}.validate-btn:disabled{opacity:.5;cursor:not-allowed}.validate-btn .spinner{vertical-align:middle;border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:16px;height:16px;margin-right:8px;animation:.6s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.layout-toggle{background:var(--bg);border:1px solid var(--border);border-radius:6px;gap:4px;padding:2px;display:flex}.layout-toggle button{cursor:pointer;color:var(--text-muted);background:0 0;border:none;border-radius:4px;padding:6px 10px;font-size:13px}.layout-toggle button[data-active=true]{background:var(--surface);color:var(--text);box-shadow:0 1px 2px #00000014}.results-split{gap:16px;min-height:400px;display:flex}.results-split .xml-panel{flex:1;min-width:0}.results-split .errors-panel{flex-shrink:0;width:360px;max-height:600px;overflow-y:auto}.results-stacked .errors-panel{margin-bottom:16px}.error-list{flex-direction:column;gap:8px;display:flex}.error-item{border-radius:var(--radius);cursor:pointer;border-left:3px solid #0000;padding:10px 12px;transition:background .15s}.error-item:hover,.error-item[data-active=true]{background:var(--bg)}.error-item[data-severity=error]{border-left-color:var(--error)}.error-item[data-severity=warning]{border-left-color:var(--warning)}.error-item .rule-id{font-size:13px;font-weight:700}.error-item[data-severity=error] .rule-id{color:var(--error)}.error-item[data-severity=warning] .rule-id{color:var(--warning)}.error-item .message{color:var(--text);margin-top:2px;font-size:13px}.error-item .location{color:var(--text-muted);margin-top:4px;font-family:monospace;font-size:11px}.xml-viewer{background:var(--viewer-bg);border-radius:var(--radius);max-height:600px;font-family:SF Mono,Fira Code,monospace;font-size:13px;line-height:1.7;overflow:auto}.xml-line{white-space:pre;padding:0 12px;display:flex}.xml-line[data-error=true]{background:var(--viewer-error-bg);border-left:3px solid var(--viewer-error-border)}.xml-line[data-highlight=true]{border-left:3px solid var(--accent);background:#6366f126}.xml-line-nr{color:var(--viewer-line-nr);text-align:right;-webkit-user-select:none;user-select:none;min-width:40px;padding-right:16px}.xml-line-content{color:var(--viewer-text)}.toast{border-radius:var(--radius);margin-bottom:16px;padding:12px 16px;font-size:14px}.toast[data-type=error]{background:var(--error-bg);color:var(--error);border:1px solid var(--error)}@media (max-width:768px){.results-split{flex-direction:column}.results-split .errors-panel{width:100%;max-height:none}}.app-shell{min-height:100vh;display:flex}.main-content{flex-direction:column;flex:1;min-width:0;display:flex}.sidebar{background:var(--surface);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:210px;height:100vh;padding:20px 16px;display:flex;position:sticky;top:0;overflow-y:auto}.sidebar-top{flex:1}.sidebar-logo{align-items:center;gap:8px;margin-bottom:28px;text-decoration:none;display:flex}.sidebar-logo-icon{background:var(--accent);color:#fff;border-radius:8px;justify-content:center;align-items:center;width:30px;height:30px;font-size:15px;font-weight:800;display:flex}.sidebar-logo-text{letter-spacing:-.5px;color:var(--text);font-size:18px;font-weight:800}.sidebar-nav{flex-direction:column;gap:2px;display:flex}.sidebar-link{color:var(--text-muted);border-radius:8px;align-items:center;gap:8px;padding:8px 12px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,color .15s;display:flex}.sidebar-link:hover{background:var(--bg);color:var(--text)}.sidebar-link.active{color:var(--accent);background:#6366f114;font-weight:600}.sidebar-bottom{border-top:1px solid var(--border);padding-top:16px}.sidebar-formats{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.format-badge{background:var(--bg);color:var(--text-muted);border-radius:10px;padding:2px 8px;font-size:11px}.format-badge.active{color:var(--accent);background:#6366f114}.sidebar-footer{flex-direction:column;display:flex}.sidebar-footer a{color:var(--text-muted);padding:4px 12px;font-size:12px;text-decoration:none}.sidebar-footer a:hover{color:var(--text)}.upload-centered{flex-direction:column;flex:1;justify-content:center;align-items:center;padding:32px;display:flex}.upload-heading{text-align:center;margin-bottom:24px}.upload-heading h2{color:var(--text);margin:0;font-size:22px;font-weight:700}.upload-heading p{color:var(--text-muted);margin-top:6px;font-size:14px}.upload-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;width:100%;max-width:560px;padding:24px}.dropzone-icon{width:48px;height:48px;color:var(--accent);background:#6366f114;border-radius:12px;justify-content:center;align-items:center;margin:0 auto 12px;display:flex}.dropzone-hint{color:var(--text-muted);margin-top:4px;font-size:13px}.file-remove-btn{border:1px solid var(--border);cursor:pointer;color:var(--text-muted);background:0 0;border-radius:4px;padding:4px 12px;font-size:13px}.file-remove-btn:hover{background:var(--bg)}.upload-bar{background:var(--surface);border-bottom:1px solid var(--border);align-items:center;gap:10px;padding:12px 20px;display:flex}.upload-bar-info{background:var(--bg);border:1px solid var(--border);color:var(--text-muted);cursor:pointer;border-radius:8px;flex:1;align-items:center;gap:10px;padding:8px 14px;font-size:13px;display:flex}.upload-bar-info:hover{border-color:var(--accent)}.upload-bar-icon{opacity:.4;flex-shrink:0}.upload-bar-filename{color:var(--text);font-weight:500}.upload-bar-sep{color:var(--border)}.upload-bar-hint{color:var(--text-muted);margin-left:auto;font-size:12px}.upload-bar-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:8px 20px;font-size:13px;font-weight:600;transition:background .2s}.upload-bar-btn:hover:not(:disabled){background:var(--accent-hover)}.upload-bar-btn:disabled{opacity:.5;cursor:not-allowed}.status-row{border-bottom:1px solid var(--border);background:var(--surface);align-items:center;padding:10px 20px;display:flex}.status-row-left{align-items:center;gap:10px;display:flex}.status-icon{border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;font-size:13px;font-weight:700;display:flex}.status-icon.valid{background:var(--success-bg);color:var(--success)}.status-icon.invalid{background:var(--error-bg);color:var(--error)}.status-label{font-size:14px;font-weight:700}.status-sep{color:var(--border)}.status-format{color:var(--accent);font-size:13px;font-weight:500}.status-errors{color:var(--error);font-size:13px}.status-warnings{color:var(--warning);font-size:13px}.status-version{color:var(--text-muted);font-size:13px}.results{flex-direction:column;flex:1;display:flex}.results-toolbar{justify-content:space-between;align-items:center;display:flex}.error-list-header{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:12px;font-size:11px;font-weight:600}.error-list-empty{color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;padding:40px 20px;display:flex}.error-list-empty-icon{background:var(--success-bg);width:40px;height:40px;color:var(--success);border-radius:50%;justify-content:center;align-items:center;margin-bottom:8px;font-size:20px;font-weight:700;display:flex}.error-item-header{justify-content:space-between;align-items:center;display:flex}.error-line{color:var(--text-muted);font-family:SF Mono,Fira Code,monospace;font-size:11px}.prose{max-width:720px;color:var(--text);padding:32px;font-size:15px;line-height:1.7}.prose h1{margin-bottom:8px;font-size:28px;font-weight:800}.prose h2{margin-top:32px;margin-bottom:12px;font-size:20px;font-weight:700}.prose h3{margin-top:24px;margin-bottom:8px;font-size:16px;font-weight:600}.prose p{margin-bottom:16px}.prose a{color:var(--accent);text-decoration:none}.prose a:hover{text-decoration:underline}.prose ul,.prose ol{margin-bottom:16px;padding-left:24px}.prose li{margin-bottom:4px}.prose code{background:var(--bg);color:var(--accent);border-radius:4px;padding:2px 6px;font-family:SF Mono,Fira Code,monospace;font-size:13px}.prose pre{color:#cdd6f4;background:#1e1e2e;border-radius:8px;margin-bottom:16px;padding:16px;font-size:13px;line-height:1.6;overflow-x:auto}.prose pre code{color:inherit;background:0 0;padding:0}.prose table{border-collapse:collapse;width:100%;margin-bottom:16px;font-size:14px}.prose th{text-align:left;border-bottom:2px solid var(--border);color:var(--text);padding:8px 12px;font-weight:600}.prose td{border-bottom:1px solid var(--border);padding:8px 12px}.prose td code{font-size:12px}.prose .muted{color:var(--text-muted)}