csharp
using System;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

namespace SecureShell
{
    public class SecureShellForm : Form
    {
        private Panel topPanel;
        private Panel bottomPanel;
        private FlowLayoutPanel appsPanel;
        private Label titleLabel;
        private Label timeLabel;
        private Button adminButton;
        private Timer clockTimer;
        
        private const string AdminPassword = "secure123";

        public SecureShellForm()
        {
            InitializeComponents();
            SetupDarkTheme();
            SetupClock();
            CreateAppIcons();
        }

        private void InitializeComponents()
        {
            // Main form setup
            this.FormBorderStyle = FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
            this.BackColor = Color.FromArgb(30, 30, 30);
            this.Text = "Secure Shell";

            // Top panel
            topPanel = new Panel();
            topPanel.Dock = DockStyle.Top;
            topPanel.Height = 60;
            topPanel.BackColor = Color.FromArgb(43, 87, 154);

            titleLabel = new Label();
            titleLabel.Text = "ЗАЩИЩЕННАЯ ОБОЛОЧКА";
            titleLabel.Font = new Font("Segoe UI", 14, FontStyle.Bold);
            titleLabel.ForeColor = Color.White;
            titleLabel.AutoSize = true;
            titleLabel.Location = new Point(20, 20);

            timeLabel = new Label();
            timeLabel.Font = new Font("Segoe UI", 14, FontStyle.Bold);
            timeLabel.ForeColor = Color.White;
            timeLabel.AutoSize = true;
            timeLabel.Anchor = AnchorStyles.Top | AnchorStyles.Right;

            topPanel.Controls.Add(titleLabel);
            topPanel.Controls.Add(timeLabel);
            this.Controls.Add(topPanel);

            // Bottom panel
            bottomPanel = new Panel();
            bottomPanel.Dock = DockStyle.Bottom;
            bottomPanel.Height = 60;
            bottomPanel.BackColor = Color.FromArgb(43, 87, 154);

            adminButton = new Button();
            adminButton.Text = "АДМИН ДОСТУП";
            adminButton.Font = new Font("Segoe UI", 10, FontStyle.Bold);
            adminButton.ForeColor = Color.White;
            adminButton.BackColor = Color.FromArgb(30, 30, 30);
            adminButton.FlatStyle = FlatStyle.Flat;
            adminButton.FlatAppearance.BorderSize = 0;
            adminButton.Height = 40;
            adminButton.Width = 150;
            adminButton.Anchor = AnchorStyles.None;
            adminButton.Click += AdminButton_Click;

            bottomPanel.Controls.Add(adminButton);
            this.Controls.Add(bottomPanel);

            // Apps panel
            appsPanel = new FlowLayoutPanel();
            appsPanel.Dock = DockStyle.Fill;
            appsPanel.Padding = new Padding(50);
            appsPanel.BackColor = Color.FromArgb(30, 30, 30);
            appsPanel.AutoScroll = true;
            this.Controls.Add(appsPanel);
        }

        private void SetupDarkTheme()
        {
            this.BackColor = Color.FromArgb(30, 30, 30);
            this.ForeColor = Color.White;
        }

        private void SetupClock()
        {
            clockTimer = new Timer();
            clockTimer.Interval = 1000;
            clockTimer.Tick += (s, e) => UpdateTime();
            clockTimer.Start();
            UpdateTime();
        }

        private void UpdateTime()
        {
            timeLabel.Text = DateTime.Now.ToString("HH:mm:ss");
            timeLabel.Location = new Point(
                topPanel.Width - timeLabel.Width - 20,
                (topPanel.Height - timeLabel.Height) / 2
            );
        }

        private void CreateAppIcons()
        {
            // Example apps - in real app you would load these from config
            AddAppIcon("Notepad", "notepad.exe");
            AddAppIcon("Calculator", "calc.exe");
            AddAppIcon("Paint", "mspaint.exe");
            AddAppIcon("Explorer", "explorer.exe");
            AddAppIcon("CMD", "cmd.exe");
            AddAppIcon("Browser", "iexplore.exe");
            AddAppIcon("Word", "winword.exe");
            AddAppIcon("Excel", "excel.exe");
            AddAppIcon("PowerPoint", "powerpnt.exe");
        }

        private void AddAppIcon(string name, string exePath)
        {
            var iconButton = new Button();
            iconButton.Width = 120;
            iconButton.Height = 120;
            iconButton.FlatStyle = FlatStyle.Flat;
            iconButton.FlatAppearance.BorderSize = 0;
            iconButton.Margin = new Padding(20);
            iconButton.BackColor = Color.FromArgb(50, 50, 50);
            iconButton.ForeColor = Color.White;
            iconButton.Font = new Font("Segoe UI", 10, FontStyle.Regular);
            iconButton.Text = name;
            iconButton.TextAlign = ContentAlignment.BottomCenter;
            iconButton.TextImageRelation = TextImageRelation.ImageAboveText;
            
            try
            {
                var icon = Icon.ExtractAssociatedIcon(exePath);
                iconButton.Image = icon.ToBitmap();
                iconButton.ImageAlign = ContentAlignment.TopCenter;
            }
            catch
            {
                // Use default icon if extraction fails
                iconButton.Image = SystemIcons.Application.ToBitmap();
            }

            iconButton.Click += (s, e) => LaunchApplication(exePath);
            appsPanel.Controls.Add(iconButton);
        }

        private void LaunchApplication(string exePath)
        {
            try
            {
                Process.Start(exePath);
            }
            catch (Exception ex)
            {
                MessageBox.Show($"Error launching application: {ex.Message}", 
                    "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void AdminButton_Click(object sender, EventArgs e)
        {
            using (var passwordForm = new PasswordForm())
            {
                if (passwordForm.ShowDialog() == DialogResult.OK)
                {
                    if (passwordForm.Password == AdminPassword)
                    {
                        MessageBox.Show("Admin access granted!", "Success", 
                            MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    else
                    {
                        MessageBox.Show("Invalid password!", "Error", 
                            MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
        }

        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new SecureShellForm());
        }
    }

    public class PasswordForm : Form
    {
        private TextBox passwordBox;
        private Button okButton;
        private Button cancelButton;

        public string Password { get; private set; }

        public PasswordForm()
        {
            InitializeComponents();
            SetupDarkTheme();
        }

        private void InitializeComponents()
        {
            this.Text = "Admin Access";
            this.FormBorderStyle = FormBorderStyle.FixedDialog;
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.StartPosition = FormStartPosition.CenterScreen;
            this.ClientSize = new Size(300, 150);
            this.AcceptButton = okButton;
            this.CancelButton = cancelButton;

            var label = new Label();
            label.Text = "Enter admin password:";
            label.Location = new Point(20, 20);
            label.AutoSize = true;
            label.ForeColor = Color.White;

            passwordBox = new TextBox();
            passwordBox.Location = new Point(20, 50);
            passwordBox.Size = new Size(260, 20);
            passwordBox.PasswordChar = '*';

            okButton = new Button();
            okButton.Text = "OK";
            okButton.Location = new Point(120, 90);
            okButton.Size = new Size(75, 30);
            okButton.DialogResult = DialogResult.OK;
            okButton.Click += (s, e) => 
            {
                Password = passwordBox.Text;
                this.Close();
            };

            cancelButton = new Button();
            cancelButton.Text = "Cancel";
            cancelButton.Location = new Point(205, 90);
            cancelButton.Size = new Size(75, 30);
            cancelButton.DialogResult = DialogResult.Cancel;

            this.Controls.Add(label);
            this.Controls.Add(passwordBox);
            this.Controls.Add(okButton);
            this.Controls.Add(cancelButton);
        }

        private void SetupDarkTheme()
        {
            this.BackColor = Color.FromArgb(30, 30, 30);
            this.ForeColor = Color.White;
            
            foreach (Control control in this.Controls)
            {
                if (control is Button button)
                {
                    button.BackColor = Color.FromArgb(43, 87, 154);
                    button.ForeColor = Color.White;
                    button.FlatStyle = FlatStyle.Flat;
                    button.FlatAppearance.BorderSize = 0;
                }
                else if (control is TextBox textBox)
                {
                    textBox.BackColor = Color.FromArgb(50, 50, 50);
                    textBox.ForeColor = Color.White;
                    textBox.BorderStyle = BorderStyle.FixedSingle;
                }
            }
        }
    }
}

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