:root{--color-bg: #f4f5f7;--color-surface: #ffffff;--color-sidebar-bg: #1a1d23;--color-sidebar-text: #a8b2c1;--color-sidebar-active: #ffffff;--color-primary: #3b82f6;--color-primary-dark: #2563eb;--color-danger: #ef4444;--color-success: #22c55e;--color-warning: #f59e0b;--color-border: #e5e7eb;--color-text: #111827;--color-text-muted: #6b7280;--sidebar-width: 240px;--topbar-height: 56px;--radius: 8px}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;color:var(--color-text);background:var(--color-bg)}.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:var(--radius);border:none;cursor:pointer;font-size:13px;font-weight:500;transition:background .15s,opacity 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10px;font-size:12px}.btn-icon{padding:6px;border-radius:6px;background:transparent;border:none;cursor:pointer;color:var(--color-text-muted)}.btn-icon:hover{background:var(--color-border)}.form-group{display:flex;flex-direction:column;gap:4px;margin-bottom:14px}.form-label{font-size:12px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.4px}.form-control{padding:8px 12px;border:1px solid var(--color-border);border-radius:var(--radius);font-size:14px;color:var(--color-text);background:var(--color-surface);width:100%;transition:border-color .15s}.form-control:focus{outline:none;border-color:var(--color-primary)}.form-control::placeholder{color:var(--color-text-muted)}select.form-control{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 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var(--color-border);display:flex;justify-content:flex-end;gap:8px}.page-layout{display:flex;height:100vh}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--color-sidebar-bg);display:flex;flex-direction:column;overflow-y:auto;flex-shrink:0}.sidebar-logo{padding:18px 16px 14px;font-size:16px;font-weight:800;color:#fff;letter-spacing:-.3px;border-bottom:1px solid rgba(255,255,255,.07)}.sidebar-logo span{color:var(--color-primary)}.sidebar-section-title{padding:16px 16px 4px;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:#a8b2c180}.sidebar-item{display:flex;align-items:center;gap:10px;padding:10px 16px;color:var(--color-sidebar-text);text-decoration:none;font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,color .15s;border-right:3px solid transparent}.sidebar-item svg{flex-shrink:0;opacity:.7}.sidebar-item:hover{background:#ffffff0f;color:#fff}.sidebar-item.active{background:#3b82f626;color:#fff;border-right-color:var(--color-primary)}.sidebar-item.active svg{opacity:1}.sidebar-footer{margin-top:auto;padding:12px 16px;border-top:1px solid rgba(255,255,255,.07)}.sidebar-user{color:var(--color-sidebar-text);font-size:12px;margin-bottom:8px}.sidebar-user strong{color:#fff;display:block;font-size:13px}.shell-content{flex:1;display:flex;flex-direction:column;overflow:hidden}.topbar{height:var(--topbar-height);background:var(--color-surface);border-bottom:1px solid var(--color-border);display:flex;align-items:center;padding:0 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