/* กำหนดพื้นหลัง */
body {
  background: linear-gradient(135deg, #1f2b42, #3a506b);
  color: #ffffff;
  font-family: "Kanit", sans-serif;
}

/* ส่วนเข้าสู่ระบบ */
.login-area {
  width: 100%;
  min-height: 80vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-area .col-12 {
  background-color: #222b3e;
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0px 10px 15px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.login-area .col-12:hover {
  transform: scale(1.003);
  box-shadow: 0px 15px 20px rgba(0, 0, 0, 0.4);
}

/* หัวข้อ */
h4 {
  color: #fff;
  text-align: center;
  font-weight: bold;
  margin-bottom: 1rem;
}

/* สไตล์ปุ่ม */
.gradient-button {
  background: linear-gradient(135deg, #505bff, #fcda98);
  border: none;
  font-size: 1rem;
  padding: 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.3);
  transition: background 0.3s ease, transform 0.2s ease;
}

.gradient-button:hover {
  background: linear-gradient(135deg, #2a38f8, #fac458);
  transform: translateY(-3px);
}

/* ฟอร์ม input */
.form-control {
  background-color: #333b4d;
  color: #ffffff;
  border: none;
  padding: 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  transition: background-color 0.3s ease;
}

.form-control:focus {
  background-color: #44506b;
  box-shadow: none;
  border-color: transparent;
  color: white;
}

/* ข้อความแจ้งเตือน */
#loginMessage {
  text-align: center;
  color: #ff4b4b;
  font-weight: bold;
  margin-top: 1rem;
}