  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Segoe UI', sans-serif;
    }

    body {
      display: flex;
      min-height: 100vh;
      background-color: #f5f7fa;
      font-family: 'Segoe UI', sans-serif;
    }

    /* Sidebar */
    .sidebar {
      width: 250px;
      background-color: #2f3542;
      color: #fff;
      display: flex;
      flex-direction: column;
    }

    .sidebar h2 {
      text-align: center;
      padding: 1rem;
      background-color: #1e272e;
      margin-bottom: 1rem;
    }

    .sidebar a {
      padding: 0.75rem 1rem;
      color: #dcdde1;
      text-decoration: none;
      display: block;
      transition: background 0.3s;
    }

    .sidebar a:hover {
      background-color: #57606f;
    }

    .dropdown {
      cursor: pointer;
    }

    .submenu {
      display: none;
      flex-direction: column;
      background-color: #404756;
    }

    .submenu a {
      padding-left: 2rem;
    }

    .dropdown.open + .submenu {
      display: flex;
    }

    /* Main content */
    .main {
      flex: 1;
      padding: 20px;
    }

    .topbar {
      background-color: #fff;
      padding: 15px 20px;
      margin-bottom: 20px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }

    .main h3 {
      margin-bottom: 20px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      background-color: #fff;
      box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
    }

    th, td {
      padding: 12px 15px;
      border-bottom: 1px solid #ddd;
      text-align: left;
    }

    th {
      background-color: #f1f2f6;
    }

    tr:hover {
      background-color: #f9f9f9;
    }

    .btn {
      padding: 6px 12px;
      border: none;
      background-color: #3742fa;
      color: white;
      border-radius: 4px;
      cursor: pointer;
    }

    .btn:hover {
      background-color: #2f36d6;
    }

    @media (max-width: 768px) {
      .sidebar {
        display: none;
      }

      .main {
        padding: 10px;
      }
    }
.login-form {
  background: #fff;
  width: 500px;
  margin: 65px auto;
  display: -webkit-box;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
          flex-direction: column;
  border-radius: 4px;
  box-shadow: 0 2px 25px rgba(0, 0, 0, 0.2);
}
.login-form h1 {
  padding: 35px 35px 0 35px;
  font-weight: 300;
}
.login-form .content {
  padding: 35px;
  text-align: center;
}
.login-form .input-field {
  padding: 12px 5px;
}
.login-form .input-field input {
  font-size: 16px;
  display: block;
  font-family: 'Rubik', sans-serif;
  width: 100%;
  padding: 10px 1px;
  border: 0;
  border-bottom: 1px solid #747474;
  outline: none;
  -webkit-transition: all .2s;
  transition: all .2s;
}
.login-form .input-field input::-webkit-input-placeholder {
  text-transform: uppercase;
}
.login-form .input-field input::-moz-placeholder {
  text-transform: uppercase;
}
.login-form .input-field input:-ms-input-placeholder {
  text-transform: uppercase;
}
.login-form .input-field input::-ms-input-placeholder {
  text-transform: uppercase;
}
.login-form .input-field input::placeholder {
  text-transform: uppercase;
}
.login-form .input-field input:focus {
  border-color: #222;
}
.login-form a.link {
  text-decoration: none;
  color: #747474;
  letter-spacing: 0.2px;
  text-transform: uppercase;
  display: inline-block;
  margin-top: 20px;
}
.login-form .action {
  display: -webkit-box;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
          flex-direction: row;
}
.login-form .action button {
  width: 100%;
  border: none;
  padding: 18px;
  font-family: 'Rubik', sans-serif;
  cursor: pointer;
  text-transform: uppercase;
  background: #e8e9ec;
  color: #777;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 0;
  letter-spacing: 0.2px;
  outline: 0;
  -webkit-transition: all .3s;
  transition: all .3s;
}
.login-form .action button:hover {
  background: #d8d8d8;
}
.login-form .action button:nth-child(2) {
  background: #2d3b55;
  color: #fff;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 4px;
}
.login-form .action button:nth-child(2):hover {
  background: #3c4d6d;
}
  </style>
