:root{--bg: #fafafa;--bg-card: #ffffff;--bg-header: #ffffff;--bg-input: #f4f5f7;--text: #1a1a2e;--text-secondary: #6b7280;--border: #e5e7eb;--accent: #6366f1;--accent-hover: #4f46e5;--shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow-lg: 0 4px 14px rgba(0,0,0,.08);--radius: 12px;--radius-sm: 8px;--transition: .2s ease}[data-theme=dark]{--bg: #0f0f23;--bg-card: #1a1a2e;--bg-header: #16162a;--bg-input: #252542;--text: #e2e8f0;--text-secondary: #94a3b8;--border: #2d2d4a;--shadow: 0 1px 3px rgba(0,0,0,.3);--shadow-lg: 0 4px 14px rgba(0,0,0,.4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);transition:background var(--transition),color var(--transition);-webkit-font-smoothing:antialiased}::selection{background:var(--accent);color:#fff}input,select,button{font-family:inherit}.sidebar{width:200px}.nav-item{display:flex;align-items:center;gap:.625rem;width:100%;padding:.625rem .75rem;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--text-secondary);font-size:.875rem;font-weight:500;cursor:pointer;text-align:left;transition:background .15s,color .15s;white-space:nowrap;overflow:hidden}.nav-item:hover{background:#6366f10f;color:var(--text)}.nav-item-active{background:#6366f11f!important;color:var(--accent)!important;font-weight:600}.nav-icon{font-size:1.1rem;flex-shrink:0}@media(max-width:1100px){.sidebar{width:56px!important;padding:1rem .375rem!important}.nav-label{display:none}.nav-item{justify-content:center;padding:.625rem}}.md-section{margin-bottom:.25rem}.md-section-header{border-radius:var(--radius-sm);padding:.25rem 0}.md-section-header:hover{background:#6366f10a}.md-section-header h2{margin:0;display:inline}.md-block-changed{border-left:3px solid #facc15;padding-left:.5rem;margin-left:-.5rem;border-radius:2px;animation:highlight-fade 4s ease-out forwards}@keyframes highlight-fade{0%{background-color:#facc154d}70%{background-color:#facc151a}to{background-color:transparent}}