*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#f2f2f2;height:100vh;overflow:hidden}.container{display:flex;height:100vh;max-width:80%;margin:0 auto;padding-top:60px}.header{position:fixed;top:0;left:0;right:0;height:60px;background:#333;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:1000}.header-left{display:flex;align-items:center;gap:16px}.header-title{font-size:18px;font-weight:600;color:#fff}.header-logo{width:32px;height:32px;background:linear-gradient(135deg,#3b82f6,#1d4ed8);border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px}.header-right{display:flex;align-items:center;gap:16px}.back-link{color:#6b7280;text-decoration:none;font-size:14px}.back-link:hover{color:#374151}.user-avatar{width:36px;height:36px;background:#3b82f6;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:14px}.sidebar{width:280px;padding-top:60px;overflow-y:auto}.sidebar-nav{padding:24px 0;background:#fff;border:1px solid #e5e7eb;border-radius:10px}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 24px;color:#6b7280;text-decoration:none;font-size:14px;font-weight:500;transition:all .2s ease;border-left:3px solid transparent}.nav-item:hover{background-color:#f9fafb;color:#374151}.nav-item.active{background-color:#eff6ff;color:#1d4ed8;border-left-color:#3b82f6}.nav-item.active .nav-icon{color:#3b82f6}.nav-icon{width:20px;height:20px;display:flex;align-items:center;justify-content:center}.main-content{flex:1;padding-top:60px;overflow-y:auto}.content-wrapper{height:100%;display:flex;flex-direction:column}@media (max-width: 768px){.sidebar{width:240px;display:none}.container{max-width:100%}.header{padding:0 16px}.main-content{padding-top:0}}