:root{--primary:#1a56db;--primary-light:#e8eefb;--sidebar-bg:#1e293b;--sidebar-text:#cbd5e1;--sidebar-hover:#334155;--sidebar-active:#2563eb;--bg:#f8fafc;--card-bg:#fff;--text:#1e293b;--text-secondary:#64748b;--border:#e2e8f0;--code-bg:#f1f5f9;--success:#059669}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;display:flex;min-height:100vh}
.sidebar{width:280px;min-width:280px;background:var(--sidebar-bg);color:var(--sidebar-text);height:100vh;position:fixed;overflow-y:auto;transition:transform .3s;z-index:100}
.sidebar-header{padding:24px 20px;border-bottom:1px solid rgba(255,255,255,.1)}
.sidebar-header h1{color:#fff;font-size:1.25rem;font-weight:700}
.sidebar-header p{color:var(--sidebar-text);font-size:.8rem;margin-top:4px}
.sidebar-search{padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.1)}
.sidebar-search input{width:100%;padding:8px 12px;border:1px solid rgba(255,255,255,.15);border-radius:6px;background:rgba(255,255,255,.08);color:#fff;font-size:.875rem;outline:none}
.sidebar-search input::placeholder{color:rgba(255,255,255,.4)}
.sidebar-search input:focus{border-color:var(--sidebar-active)}
.nav-category{padding:12px 16px 4px;font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:rgba(255,255,255,.4);cursor:pointer;user-select:none;display:flex;justify-content:space-between;align-items:center}
.nav-category:hover{color:rgba(255,255,255,.6)}
.nav-category .arrow{transition:transform .2s;font-size:.6rem}
.nav-category.collapsed .arrow{transform:rotate(-90deg)}
.nav-links{list-style:none}
.nav-links.collapsed{display:none}
.nav-links a{display:block;padding:6px 16px 6px 24px;color:var(--sidebar-text);text-decoration:none;font-size:.85rem;border-left:3px solid transparent;transition:all .15s}
.nav-links a:hover{background:var(--sidebar-hover);color:#fff}
.nav-links a.active{background:rgba(37,99,235,.15);border-left-color:var(--sidebar-active);color:#fff}
.main{margin-left:280px;flex:1;min-width:0}
.topbar{background:var(--card-bg);border-bottom:1px solid var(--border);padding:12px 32px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:50}
.topbar .breadcrumb{font-size:.85rem;color:var(--text-secondary)}
.topbar .breadcrumb a{color:var(--primary);text-decoration:none}
.menu-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}
.content{max-width:900px;margin:0 auto;padding:32px}
.content h2{font-size:1.75rem;font-weight:700;margin:32px 0 16px;padding-bottom:8px;border-bottom:2px solid var(--border);color:var(--text)}
.content h2:first-child{margin-top:0}
.content h3{font-size:1.35rem;font-weight:600;margin:24px 0 12px;color:var(--text)}
.content h4{font-size:1.1rem;font-weight:600;margin:20px 0 8px;color:var(--text)}
.content h5,.content h6{font-size:1rem;font-weight:600;margin:16px 0 8px}
.content p{margin-bottom:12px}
.content a{color:var(--primary);text-decoration:none}
.content a:hover{text-decoration:underline}
.content ul,.content ol{margin:8px 0 16px 24px}
.content li{margin-bottom:4px}
.content pre{background:var(--code-bg);border:1px solid var(--border);border-radius:8px;padding:16px;overflow-x:auto;margin:12px 0;font-size:.85rem;line-height:1.6}
.content code{background:var(--code-bg);padding:2px 6px;border-radius:4px;font-size:.875em;font-family:'Fira Code',Consolas,monospace}
.content pre code{background:none;padding:0;border-radius:0}
.content strong{font-weight:600}
.home-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-top:24px}
.home-card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:20px;transition:all .2s}
.home-card:hover{border-color:var(--primary);box-shadow:0 4px 12px rgba(0,0,0,.08);transform:translateY(-2px)}
.home-card h3{font-size:1rem;margin:0 0 8px;color:var(--primary);border:none}
.home-card ul{list-style:none;margin:0;padding:0}
.home-card li{margin-bottom:4px}
.home-card a{color:var(--text);text-decoration:none;font-size:.875rem}
.home-card a:hover{color:var(--primary)}

/* User info in topbar */
.user-info{display:flex;align-items:center;gap:12px;font-size:.85rem}
.user-badge{display:flex;align-items:center;gap:8px}
.user-avatar{width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700}
.user-name{color:var(--text);font-weight:600}
.user-link{color:var(--primary);text-decoration:none;font-size:.8rem;padding:4px 10px;border-radius:6px;transition:all .15s}
.user-link:hover{background:var(--primary-light);text-decoration:none}
.user-logout{color:var(--text-secondary)}
.user-logout:hover{color:#dc2626;background:#fef2f2}

@media(max-width:768px){.sidebar{transform:translateX(-100%)}.sidebar.open{transform:translateX(0)}.main{margin-left:0}.menu-toggle{display:block}.content{padding:20px 16px}.user-name{display:none}}
@media print{.sidebar,.topbar{display:none}.main{margin-left:0}}