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var(--sidebar-width);background:linear-gradient(180deg,var(--blue-900),var(--blue-800));color:#fff;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:10px;padding:22px 20px;font-size:19px;font-weight:700;letter-spacing:.5px}.brand-logo{width:32px;height:32px;display:block;object-fit:contain}.sidebar-nav{flex:1;padding:10px 12px}.nav-item{display:flex;align-items:center;gap:10px;padding:11px 14px;margin-bottom:4px;border-radius:10px;color:#ffffffc7;text-decoration:none;font-size:14px;transition:background .15s ease,color .15s ease}.nav-item:hover{background:#ffffff14;color:#fff}.nav-item.active{background:linear-gradient(90deg,var(--blue-600),var(--blue-500));color:#fff;box-shadow:0 6px 16px #2563eb59}.sidebar-footer{padding:14px;border-top:1px solid rgba(255,255,255,.12);color:#ffffffb8;font-size:13px}.main{flex:1;min-width:0;display:flex;flex-direction:column}.topbar{height:64px;background:#fff;border-bottom:1px solid 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