body {
  margin: 0;
  padding: 0;
  background: linear-gradient(to bottom, #c0d3eb, #eaf1f8);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.window {
  width: 420px;
  border: 1px solid #5a7dad;
  border-radius: 6px;
  background: linear-gradient(to bottom, #f2f6fc, #dce7f5);
  box-shadow: inset 0 1px 0 #ffffff, 0 0 10px rgba(0, 0, 0, 0.5);
}

.window-header {
  background: linear-gradient(to bottom, #e7f1fd, #b6cde5);
  padding: 10px 14px;
  border-bottom: 1px solid #94b2d6;
  border-top-left-radius: 6px;
  border-top-right-radius: 6px;
  box-shadow: inset 0 1px 0 #fff;
}

.window-title {
  font-weight: bold;
  color: #1a3365;
  font-size: 14px;
  text-shadow: 0 1px 0 #fff;
}

.window-body {
  padding: 20px;
  background: #f9fbfe;
  border-bottom-left-radius: 6px;
  border-bottom-right-radius: 6px;
}

.login-form {
  text-align: center;
}

.logo {
  width: 90%;
  margin-bottom: 15px;
}

hr {
  border: none;
  border-top: 1px solid #ccc;
  margin: 15px 0;
}

label {
  display: block;
  margin: 10px 0 5px;
  text-align: left;
  font-size: 13px;
  color: #2e2e2e;
  text-shadow: 0 1px 0 #fff;
}

.input-field {
  width: 100%;
  padding: 8px;
  border: 1px solid #7f9db9;
  border-radius: 4px;
  background: linear-gradient(to bottom, #ffffff, #e7eef5);
  font-size: 13px;
  box-shadow: inset 0 1px 1px #ccc;
  box-sizing: border-box;
}

.win7-button {
  margin-top: 15px;
  background: linear-gradient(to bottom, #aad3f3, #4986c3);
  border: 1px solid #376ea2;
  border-radius: 4px;
  color: #fff;
  font-weight: bold;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
  text-shadow: 0 -1px 0 #1c3f74;
  box-shadow: inset 0 1px 0 #cde6f7, 0 1px 2px rgba(0, 0, 0, 0.2);
  transition: transform 0.1s;
}

.win7-button:hover {
  background: linear-gradient(to bottom, #c0e0ff, #5d9cd6);
}

.win7-button:active {
  transform: translateY(1px);
}