/* File: /wp-content/themes/your-theme/header-custom.css */

/* ===== TOP BAR ===== */
.top-bar {
  background: #001f3f;
  color: #fff;
  padding: 8px 0;
  font-size: 13px;
}

.top-bar a {
  color: #fff;
  margin: 0 10px;
  transition: color 0.3s ease;
}

.top-bar a:hover {
  color: #fd5308;
}

/* Language Switcher */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.lang-switcher img {
  width: 20px;
  height: 14px;
  vertical-align: middle;
}

/* ===== MAIN HEADER ===== */
.main-header-content {
  background: #002858;
  padding: 15px 0;
  position: relative;
  z-index: 999;
}

/* Sticky Header */
.main-header-content.sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

/* Logo */
.logo img {
  height: 60px;
  transition: height 0.3s ease;
}

.sticky .logo img {
  height: 50px;
}

/* ===== NAVIGATION ===== */
.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 25px;
}

.main-nav ul li {
  position: relative;
}

.main-nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 10px 5px;
  display: block;
  position: relative;
  transition: all 0.3s ease;
}

/* Hover Effect - Underline Animation */
.main-nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: #fd5308;
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.main-nav ul li a:hover::after,
.main-nav ul li.current-menu-item a::after {
  width: 100%;
}

.main-nav ul li a:hover {
  color: #fd5308;
}

/* ===== DROPDOWN MENU ===== */
.main-nav ul li ul {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 250px;
  background: #fff;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 1000;
  flex-direction: column;
  gap: 0;
}

.main-nav ul li:hover > ul {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.main-nav ul li ul li a {
  color: #333;
  padding: 12px 20px;
  border-bottom: 1px solid #f0f0f0;
  text-transform: none;
  font-size: 13px;
}

.main-nav ul li ul li a:hover {
  background: #f8f8f8;
  color: #002858;
  padding-left: 25px;
}

/* Sub-dropdown (3rd level) */
.main-nav ul li ul li ul {
  left: 100%;
  top: 0;
}

/* ===== MEGA MENU (untuk Research Group) ===== */
.main-nav ul li.mega-menu {
  position: static;
}

.main-nav ul li.mega-menu > ul {
  width: 100%;
  left: 0;
  right: 0;
  display: flex;
  flex-wrap: wrap;
  padding: 30px;
  gap: 30px;
}

.main-nav ul li.mega-menu > ul > li {
  flex: 0 0 calc(25% - 30px);
}

.main-nav ul li.mega-menu > ul > li > a {
  font-weight: 600;
  color: #002858;
  border-bottom: 2px solid #fd5308;
  padding-bottom: 10px;
  margin-bottom: 15px;
}

/* ===== HEADER ACTIONS ===== */
.header-actions {
  display: flex;
  align-items: center;
  gap: 15px;
}

.search-toggle {
  background: transparent;
  border: 1px solid #fff;
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.search-toggle:hover {
  background: #fd5308;
  border-color: #fd5308;
}

.btn-apply {
  background: #fd5308;
  color: #fff;
  padding: 10px 25px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.5px;
}

.btn-apply:hover {
  background: #e04707;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(253, 83, 8, 0.3);
}

/* ===== SEARCH BOX ===== */
.search-box {
  position: absolute;
  top: 100%;
  right: 0;
  width: 400px;
  background: #fff;
  padding: 20px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
}

.search-box.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.search-box input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 14px;
}

.search-box button {
  width: 100%;
  margin-top: 10px;
  padding: 12px;
  background: #002858;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s ease;
}

.search-box button:hover {
  background: #fd5308;
}

/* ===== MOBILE MENU ===== */
@media (max-width: 991px) {
  .main-header-content .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .main-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: #002858;
    padding: 80px 20px 20px;
    overflow-y: auto;
    transition: right 0.3s ease;
    z-index: 9999;
  }
  
  .main-nav.active {
    right: 0;
    box-shadow: -5px 0 20px rgba(0,0,0,0.3);
  }
  
  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }
  
  .main-nav ul li a {
    padding: 15px 10px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  
  .main-nav ul li ul {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: rgba(0,0,0,0.2);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  
  .main-nav ul li.menu-open > ul {
    max-height: 500px;
  }
  
  .main-nav ul li ul li a {
    padding-left: 30px;
    color: #fff;
  }
  
  /* Mobile Toggle Button */
  .mobile-toggle {
    display: block;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    z-index: 10000;
  }
  
  .mobile-toggle.active .fa-bars::before {
    content: "\f00d"; /* X icon */
  }
  
  /* Overlay */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 9998;
  }
  
  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }
}