/* .form-signin {
  width: 100%;
  max-width: 330px;
  padding: 15px;
  margin: auto;
}
body {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  background-color: #f5f5f5;
}
html, body {
  height: 100%;
} */

 /* body {
  background-color: #f8f9fa;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.form-signin {
  background-color: #fff;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.btn-img {
  max-width: 50%;
  margin-bottom: 10px;
}

.login-box-msg {
  font-size: 24px;
  margin-top: 10px;
  color: #333;
} */

body {
  background-image: url('background01.jpg');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}

.center-div {
  max-width: 90%; /* ปรับความกว้างให้เหมาะสมกับมือถือ */
  padding: 20px;
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  text-align: center;
  margin: 30px;
}

.btn-img {
  border-radius: 50%;
  border: 2px solid #ffffff;
  background-color: #ffffff;
  padding: 5px;
  transition: border-color 0.3s;
}

.btn-img:hover {
  border-color: #dddddd;
}

.login-box-msg {
  font-size: 20px; /* ปรับขนาดตัวหนังสือให้เหมาะสมกับมือถือ */
  font-weight: bold;
  margin-top: 10px;
  color: #333333;
}

a {
  text-decoration: none;
  color: #007bff;
  transition: color 0.3s;
}

a:hover {
  text-decoration: underline;
  color: #0056b3;
}