* {
  box-sizing: border-box;
  font-family: 'Sarabun', sans-serif;
}
        .dropdown {
            position: relative;
            display: inline-block;
        }

        .dropdown-btn {
            background-color: #3498db;
            color: white;
            padding: 10px 16px;
            font-size: 16px;
            border: none;
            cursor: pointer;
            border-radius: 5px;
        }

        .dropdown-content {
            display: none;
            position: absolute;
            background-color: white;
            min-width: 180px;
            box-shadow: 0px 8px 16px rgba(0,0,0,0.2);
            z-index: 1;
            border-radius: 5px;
        }

        .dropdown-content a {
            color: black;
            padding: 12px 16px;
            text-decoration: none;
            display: block;
        }

        .dropdown-content a:hover {
            background-color: #f1f1f1;
        }

        .dropdown:hover .dropdown-content {
            display: block;
        }

        .dropdown:hover .dropdown-btn {
            background-color: #2980b9;
        }
body {
  margin: 0;
  background: url('background.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #333;
}

.login-container {
  display: flex;
  min-height: 100vh;
  background-color: rgba(255, 255, 255, 0.9);
}

.login-left {
  flex: 1;
  background-color: #2e7d32;
  color: white;
  padding: 60px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.school-logo {
  width: 120px;
  height: auto;
  margin-bottom: 20px;
}

.login-left h1 {
  font-size: 32px;
  margin-bottom: 10px;
}

.login-left p {
  font-size: 18px;
}

.login-right {
  flex: 1;
  background-color: white;
  padding: 60px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.login-right h2 {
  font-size: 24px;
  margin-bottom: 30px;
  color: #2e7d32;
}

form {
  display: flex;
  flex-direction: column;
}

label {
  margin-bottom: 6px;
  font-weight: bold;
}

input, select {
  padding: 10px;
  margin-bottom: 20px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 16px;
}

button {
  padding: 12px;
  background-color: #4caf50;
  color: white;
  border: none;
  font-size: 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #388e3c;
}

.forgot-password {
  margin-top: 10px;
  text-align: right;
}

.forgot-password a {
  color: #4caf50;
  text-decoration: none;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 14px;
  background-color: #eee;
  color: #666;
}

/* Responsive */
@media (max-width: 768px) {
  .login-container {
    flex-direction: column;
  }

  .login-left, .login-right {
    flex: none;
    width: 100%;
    padding: 30px;
  }

  .school-logo {
    width: 80px;
  }
}

.nav-item.dropdown:hover .dropdown-menu {
    display: block;
    margin-top: 0;
}
.custom-dropdown {
    min-width: 100vw; /* ให้กว้างเต็มหน้าจอ */
}

.custom-dropdown .dropdown-item {
    text-align: left;        /* ชิดขวา */
    padding-right: 50px;      /* เว้นขอบขวานิดหน่อย */
    white-space: nowrap;      /* ไม่ให้ข้อความตัดบรรทัด */
}