.modern-sidebar{background-color:#fff;border-radius:10px;box-shadow:0 0 15px rgba(0,0,0,.1);padding:20px 0;position:relative;transition:all .3s ease;width:250px;margin-bottom:20px;margin-top:25px}.modern-sidebar.collapsed{padding:20px 10px;width:80px}.collapse-btn{position:absolute;top:20px;right:-15px;width:30px;height:30px;border-radius:50%;background-color:#fff;border:1px solid #e0e0e0;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:10;box-shadow:0 2px 5px rgba(0,0,0,.1);transition:all .3s ease}.collapse-btn:hover{background-color:#f8f9fa}.sidebar-header{padding:0 20px 20px;border-bottom:1px solid #f0f0f0;margin-bottom:20px;text-align:center}.user-avatar{margin:0 auto 15px;width:60px;height:60px;border-radius:50%;overflow:hidden;display:flex;align-items:center;justify-content:center;background-color:#f0f0f0}.modern-sidebar.collapsed .user-avatar{width:40px;height:40px}.avatar-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background-color:#007bff;color:white;font-size:24px;font-weight:700}.modern-sidebar.collapsed .avatar-placeholder{font-size:18px}.user-info{text-align:center}.user-name{font-size:16px;font-weight:600;margin-bottom:5px}.user-email{font-size:12px;color:#6c757d;margin-bottom:0;word-break:break-all}.sidebar-nav{padding:0 10px}.nav-item{margin-bottom:5px}.nav-link{display:flex;align-items:center;padding:10px;border-radius:8px;color:#495057;transition:all .2s ease}.nav-link.active{color:#007bff;font-weight:500}.nav-link i{font-size:18px;min-width:24px;text-align:center;margin-right:10px}.modern-sidebar.collapsed .nav-link i{margin-right:0}.nav-link span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.logout-item{margin-top:20px}.logout-btn{width:100%;text-align:left;background:none;border:none;color:#dc3545}.logout-btn:hover{background-color:#fff5f5}@media (max-width:768px){.modern-sidebar{width:100%;margin-bottom:20px}.modern-sidebar.collapsed{width:80px}.collapse-btn{display:none}}