.sidebar {
    height: 100vh;
    position: fixed;
    width: 240px;
    background: linear-gradient(180deg, #1a1a1a, #2e2e2e);
    color: #e0e0e0;
    color: white;
    padding: 15px;
    transition: width 0.3s ease, transform 0.3s ease;
    overflow-x: hidden;
}

.sidebar.collapsed {
    width: 70px;
}

.sidebar.collapsed .nav-link span,
.sidebar.collapsed .sidebar-title span,
.sidebar.collapsed .profile-details {
    display: none;
}

.sidebar.collapsed .profile-img {
    width: 40px;
    height: 40px;
    margin: 0 auto;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.sidebar-title {
    margin: 0;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-logo {
    font-weight: bold;
    color: #1a73e8;
}

.user-info {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
}

.username {
    font-weight: 600;
}

.user-status {
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-icon {
    font-size: 0.55rem;
}

.status-icon.offline { color: #888; }
.status-icon.online { color: #2e7d32; }

.profile-section {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    padding: 10px;
    background: #2e2e2e;
    border-radius: 8px;
}

.profile-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid #1a73e8;
    transition: all 0.3s ease;
}

.profile-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.profile-stats {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.8rem;
    color: #bbb;
}

.profile-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.auth-btn {
    padding: 4px 12px;
    font-size: 0.8rem;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.auth-btn:hover {
    transform: translateY(-2px);
}

.nav-link {
    color: #a3a3d4;
    padding: 8px 15px;
    border-radius: 6px;
    margin: 3px 5px;
    display: flex;
    align-items: center;
    transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    background-color: #2e2e2e;
    color: white;
}

 @media (max-width: 768px) {
    .sidebar {
        width: 70px;
        transform: translateX(0);
    }

    .sidebar.collapsed {
        transform: translateX(-100%);
    }
    
    .sidebar-title span,
    .profile-details {
        display: none;
    }

    .profile-img {
        width: 40px;
        height: 40px;
        margin: 0 auto;
    }
}