/* ==================== HEADER CƠ BẢN ==================== */
.navbar {
  padding: 0.8rem 2rem;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.navbar .container {
  max-width: 1200px;
  margin: 0 auto;
}

.navbar-brand img {
  height: 100px;
  transition: transform 0.3s ease;
}

.navbar-brand img:hover {
  transform: scale(1.05);
}

.navbar-nav .nav-link {
  /* color: #ffffff !important; */
  font-size: 1rem;
  letter-spacing: 2px;
  padding: 8px 12px !important;
  margin: 0 6px;
   display: inline-block;
  position: relative;
  transition: all 0.3s ease;
  transform-origin: center center;
}


/* Hamburger */
.navbar-toggler {
  border: none;
  background: none;
  position: relative;
  z-index: 5000 !important;
}


.navbar-toggler-icon {
  background-image: none !important;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  position: relative;
  display: inline-block;
  transition: all 0.3s ease-in-out;
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
  content: "";
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  position: absolute;
  left: 0;
  transition: all 0.3s ease-in-out;
}

.navbar-toggler-icon::before {
  top: -8px;
}

.navbar-toggler-icon::after {
  top: 8px;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
  background: none;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before,
.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
  background-color: #ffffff; /* màu X */
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
  transform: rotate(-45deg);
  top: 0;
}



/* ==================== 1️⃣ HEADER TRANG CHÍNH ==================== */
.hero-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  /* chiều cao cố định, không phụ thuộc padding */
  height: 110px;
  display: flex;
  align-items: center;

  transition:
    background-color 0.4s ease,
    box-shadow 0.4s ease,
    transform 0.3s ease;
}


.hero-header .navbar {
  position: absolute;
  top: 0;
  width: 100%;
  background: transparent !important;
  z-index: 100;
}

/* Khi header được thêm class .scrolled */
/* KHI SCROLL */
.hero-header.scrolled {
  background-color: #1C4278;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  transform: translateY(0); /* chỉ transform, không đổi height/padding */
}

/* Logo thu nhỏ mượt mà khi scroll */
.hero-header .navbar-brand img {
  height: 100px;
  transition: transform 0.3s ease;
}

.hero-header.scrolled .navbar-brand img {
  transform: scale(0.85);
}

/* màu chữ header */
.hero-header .navbar-nav .nav-link {
  color: #fff !important;
}
/* SCROLLED */
.hero-header.scrolled .navbar-nav .nav-link {
  color: #fff !important;
}


/* Màu chữ khi hover */
.hero-header .navbar-nav .nav-link:hover {
  color: #FFD700 !important;
  transform: scale(1.05);
}
/* SCROLLED */
.hero-header.scrolled .navbar-nav .nav-link:hover {
  color: #1C4278 !important;
  transform: scale(1.05);
}

/* Hiệu ứng nền xanh khi hover */
.hero-header .navbar-nav .nav-link:hover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 3px;
  right: 3px;
  height: 40px;
  background-color: #1C4278;
  border-radius: 4px;
  z-index: -1;
  transition: all 0.3s ease; 
}
/* SCROLLED */
.hero-header.scrolled  .navbar-nav .nav-link:hover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 3px;
  right: 3px;
  height: 40px;
  background-color: #FBDC47;
  border-radius: 4px;
  z-index: -1;
  transition: all 0.3s ease;
}

/* Ô Active: hiện đang ở trang này */
.hero-header .navbar-nav .nav-link.active {
  background-color: #1C4278;
  color: #FBDC47 !important;
  border-radius: 4px;
  font-weight: 600;
}
/* SCROLLED */
.hero-header.scrolled  .navbar-nav .nav-link.active {
  background-color: #FBDC47;
  color: #1C4278 !important;
  border-radius: 4px;
  font-weight: 600;
}



/* ==================== 2️⃣ HEADER TRANG PHỤ ==================== */
.subpage-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background-color: #FFFCEE !important;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
   transition: transform 0.3s ease; /* hiệu ứng trượt mượt */
}

/* Link style cho trang phụ */

/* màu chữ header */
.subpage-header .navbar-nav .nav-link {
  color: #1C4278 !important;
}

.subpage-header .navbar-nav .nav-link:hover {
  color: #FBDC47 !important;
  font-weight: 600;
  transform: scale(1.05);
}

/* Hiệu ứng nền xanh khi hover */
.subpage-header .navbar-nav .nav-link:hover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 3px;
  right: 3px;
  height: 40px;
  background-color: #1C4278;
  border-radius: 4px;
  z-index: -1;
  transition: all 0.3s ease;
}

.subpage-header .navbar-nav .nav-link.active {
  background-color: #1C4278;
  color: #FBDC47 !important;
  border-radius: 4px;
  font-weight: 600;
}




/* ==================== RESPONSIVE ==================== */
@media (max-width: 992px) {
.navbar-brand img {
    height: 80px;
}

.navbar-collapse {
  position: fixed;
  top: 0;
  right: -100%;
  width: 25%;
  height: 580px; 
  z-index: 3000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 80px;
  transition: all 0.3s ease;
  /* background: rgba(28, 66, 120, 0.97); */
}

.navbar-collapse.show {
  right: 0; /* slide vào màn hình */
}

.subpage-header .navbar-collapse.show{
   background: #FFFCEE; 
}

.hero-header .navbar-collapse.show{
  background: rgba(28, 66, 120, 0.97); 
}

.navbar-nav {
  margin-top: 50px;
  width: 100%;
  text-align: center;
  background-color: transparent;
}

.navbar-nav .nav-link {
  color: #fff !important;
  display: block;
  margin: 10px 0;
}

/* Haven't SCROLLED */

  /* Trang Active */
.hero-header .navbar-nav .nav-link.active {
  background-color: #FBDC47;
  color: #1C4278 !important;
  border-radius: 4px;
  font-weight: 600;
}

/* Hiệu ứng nền vàng khi hover */
.hero-header .navbar-nav .nav-link:hover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 3px;
  right: 3px;
  height: 40px;
  background-color: #FBDC47;
  border-radius: 4px;
  z-index: -1;
  transition: all 0.3s ease;
}

/* Màu chữ khi hover */
.hero-header .navbar-nav .nav-link:hover {
  color: #1C4278 !important;
  transform: scale(1.05);
}



/* ====================== HAMBURGER CHO SUBPAGE ====================== */

.subpage-header .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
  background: none !important;
}

.subpage-header .navbar-toggler-icon,
.subpage-header .navbar-toggler-icon::before,
.subpage-header .navbar-toggler-icon::after {
  background-color: #1C4278 !important; /* xanh đậm */
}

/* Khi mở menu trên subpage (chuyển sang X) */
.subpage-header .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before,
.subpage-header .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
  background-color: #1C4278 !important;
}
 /* .subpage-header .navbar-nav .nav-link:hover::after {
  bottom: 10px;
}

.hero-header.scrolled  .navbar-nav .nav-link:hover::after {
  bottom: 7px;
} */

}