.btn-navbar {
  position: relative;
  background: transparent;
  border: none;
  padding: 6px 14px;
  font-size: 20px; /* Desktop */
  font-weight: 500;
  color: #333;
  text-decoration: none;
  overflow: hidden;
  transition: color 0.3s ease;
  z-index: 1;
}

.btn-navbar {
  border-radius: 0 !important;
  overflow: hidden;
}

/* พื้นหลัง fade จากซ้ายไปขวา */
.btn-navbar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  border-radius: 0 !important;
  background-color: #198754; /* เขียวหญ้า */
  transition: width 0.3s ease;
  z-index: -1;
}

/* hover effect */
.btn-navbar:hover::before {
  width: 100%;
}

/* hover สีตัวอักษร */
.btn-navbar:hover {
  color: #fff;
}
.huiteng-nav2 {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;

  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);

  /* เริ่มต้นซ่อนไว้ */
  opacity: 0;
  transform: translateY(-12px);
  pointer-events: none;

  transition: opacity 0.25s ease, transform 0.25s ease;
}

/* ตอนต้องแสดง */
.huiteng-nav2.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.huiteng-nav2 {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 20;

  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);

  opacity: 0;
  transform: translateY(-12px);
  pointer-events: none;
  transition: all 0.25s ease;
}

.huiteng-nav2.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.navbar-toggler {
  border: none;
}

@media (max-width: 991.98px) {
  .navbar-nav {
    padding-top: 10px;
    gap: 10px !important;
  }

  .btn-navbar,
  .btn-leg {
    width: 50%;
    border-radius: 20px;
    background-color: none;
    border: 0px solid #000;
    text-align: left;
  }

  .btn-navbar {
    font-size: 16px;
    padding: 6px 12px;
  }
}

/* Mobile (≤ 575px) */
@media (max-width: 575px) {
  .btn-navbar {
    font-size: 16px;
    padding: 6px 10px;
  }
}