/* Research Module Custom Styles */

/* ==================
   General Styling
================== */
.research-body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
}

/* ==================
   Header & Navigation
================== */
.research-header {
    background: linear-gradient(135deg, #3498db 0%, #2c3e50 100%) !important;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.research-logo {
    max-height: 60px;
    transition: all 0.4s ease;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.navbar-brand:hover .research-logo {
    transform: scale(1.05);
    filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.3)) brightness(1.05);
}

/* Navbar styling */
.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    transition: all 0.3s ease;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .active > .nav-link {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* ==================
   Bootstrap Dropdown Menu ที่ทำงานได้ถูกต้อง
================== */

.dropdown-submenu {
    position: relative !important;
    z-index: 9999 !important; /* เพิ่ม z-index สูงสุด */
}

.dropdown-submenu > .dropdown-menu {
    position: absolute !important;
    top: 0 !important;
    left: 100% !important;
    margin-top: -8px !important;
    z-index: 1001 !important;
    border-radius: 4px !important;
    box-shadow: 0 6px 12px rgba(0,0,0,.175) !important;
    display: none !important;
    background: rgba(255, 0, 0, 0.8) !important; /* สีแดงโปร่งใส */
    border: 2px solid blue !important;
    min-height: 100px !important;
    min-width: 200px !important;
}

/* แสดงเมนูย่อยเมื่อ hover บน desktop */
@media (min-width: 768px) {
    .dropdown-submenu:hover > .dropdown-menu {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
}

/* แสดงเมนูย่อยเมื่อมีคลาส show */
.dropdown-submenu.show > .dropdown-menu,
.dropdown-menu.show {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

/* ลูกศรสำหรับ submenu */
.dropdown-submenu > .dropdown-toggle:after {
    display: block !important;
    content: " " !important;
    float: right !important;
    width: 0 !important;
    height: 0 !important;
    border-color: transparent !important;
    border-style: solid !important;
    border-width: 5px 0 5px 5px !important;
    border-left-color: #ccc !important;
    margin-top: 5px !important;
    margin-right: -10px !important;
}

.dropdown-submenu:hover > .dropdown-toggle:after {
    border-left-color: #21a7d0 !important;
}

/* Enhanced dropdown appearance */
.dropdown-menu {
    border: none !important;
    border-radius: 8px !important;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15) !important;
    overflow: visible !important;
    border-top: 3px solid #21a7d0 !important;
    z-index: 6050 !important;
    background: #fff !important;
}

.dropdown-item {
    padding: 8px 20px !important;
    font-weight: 500 !important;
    color: #2c3e50 !important;
    transition: all 0.2s ease !important;
}

.dropdown-item:hover, 
.dropdown-item:focus {
    background: linear-gradient(135deg, rgba(33,167,208,0.08) 0%, rgba(52,152,219,0.05) 100%) !important;
    color: #21a7d0 !important;
    transform: translateX(5px) !important;
}

/* ตรวจสอบให้แน่ใจว่า parent ไม่มี overflow hidden */
.navbar-nav,
.navbar,
.research-header {
    overflow: visible !important;
    z-index: 9998 !important;
}

/* Fix สำหรับ Bootstrap dropdown */
.navbar-nav .dropdown-menu {
    position: absolute !important;
    top: 100% !important;
    left: 0 !important;
    z-index: 6050 !important;
    display: none !important;
    float: none !important;
    min-width: 200px !important;
}

.navbar-nav .dropdown-submenu > .dropdown-menu {
    z-index: 6060 !important;
}

/* Mobile responsive */
@media (max-width: 767.98px) {
    .dropdown-menu {
        position: static !important;
        float: none !important;
        width: auto !important;
        margin-top: 0 !important;
        background-color: rgba(0,0,0,0.05) !important;
        border: none !important;
        box-shadow: none !important;
        border-radius: 0 !important;
    }
    
    .dropdown-submenu > .dropdown-menu {
        position: static !important;
        margin-left: 1rem !important;
        box-shadow: none !important;
    }
}

/* ==================
   Section Styling
================== */
.section-title {
    border-left: 5px solid #21a7d0;
    padding-left: 15px;
    font-weight: 600;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    background: none;
}

/* ==================
   Research Card
================== */
.research-card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 24px rgba(39,60,102,0.07);
    transition: box-shadow 0.2s, transform 0.2s;
    background: #fff;
}

.research-card:hover {
    box-shadow: 0 8px 32px rgba(33,167,208,0.15);
    transform: translateY(-4px) scale(1.02);
}

.research-card .card-img-top {
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    height: 180px;
    object-fit: cover;
    background: #f5f5f5;
}

.research-card-placeholder {
    height: 180px;
    background: #f5f5f5;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
}

.research-card .card-title {
    font-size: 1.05rem;
    font-weight: 500;
    color: #273c66;
    margin-bottom: 0;
    transition: color 0.2s;
}

.research-card .card-title:hover {
    color: #21a7d0;
    text-decoration: underline;
}

/* ==================
   Buttons & Links
================== */
.btn-outline-primary {
    border-radius: 20px;
    font-size: 0.95rem;
    padding: 3px 18px;
    border-width: 2px;
}

/* ==================
   Back to Top Button
================== */
#scrollUp {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 45px;
    height: 45px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: none;
}

#scrollUp:hover {
    background: #21a7d0;
    transform: translateY(-3px);
}

/* ==================
   Responsive Design
================== */
@media (max-width: 767px) {
    .section-title {
        font-size: 1.15rem;
        padding-left: 10px;
    }
    
    .research-card .card-img-top,
    .research-card-placeholder {
        height: 130px;
    }
}

@media (max-width: 575px) {
    .research-stats {
        padding: 40px 0;
    }
}

/* ==================
   แก้ไขปัญหา RS Menu บัง Bootstrap Dropdown
================== */

/* บังคับ override RS Menu CSS ที่ซ่อน submenu */
.research-header .navbar-nav .dropdown-menu,
.research-header .navbar-nav .dropdown-submenu > .dropdown-menu,
.research-header .dropdown-menu,
.research-header .dropdown-submenu > .dropdown-menu {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    display: none; /* ให้ JavaScript ควบคุม */
    position: absolute !important;
    background: #fff !important;
    border: none !important;
    border-radius: 8px !important;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15) !important;
    border-top: 3px solid #21a7d0 !important;
    z-index: 10000 !important;
    min-width: 200px !important;
}

/* เมื่อมีคลาส show ให้แสดง */
.research-header .dropdown-menu.show,
.research-header .dropdown-submenu.show > .dropdown-menu {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
}

/* กำหนดตำแหน่ง submenu */
.research-header .dropdown-submenu {
    position: relative !important;
}

.research-header .dropdown-submenu > .dropdown-menu {
    top: 0 !important;
    left: 100% !important;
    margin-top: -6px !important;
    margin-left: -1px !important;
}

/* ลูกศรสำหรับ submenu */
.research-header .dropdown-submenu > .dropdown-toggle:after {
    display: block !important;
    content: " " !important;
    float: right !important;
    width: 0 !important;
    height: 0 !important;
    border-color: transparent !important;
    border-style: solid !important;
    border-width: 5px 0 5px 5px !important;
    border-left-color: #ccc !important;
    margin-top: 5px !important;
    margin-right: -10px !important;
}

.research-header .dropdown-submenu:hover > .dropdown-toggle:after {
    border-left-color: #21a7d0 !important;
}

/* สไตล์ dropdown item */
.research-header .dropdown-item {
    padding: 8px 20px !important;
    font-weight: 500 !important;
    color: #2c3e50 !important;
    transition: all 0.2s ease !important;
}

.research-header .dropdown-item:hover, 
.research-header .dropdown-item:focus {
    background: linear-gradient(135deg, rgba(33,167,208,0.08) 0%, rgba(52,152,219,0.05) 100%) !important;
    color: #21a7d0 !important;
    transform: translateX(5px) !important;
}

/* ป้องกัน parent overflow */
.research-header,
.research-header .navbar,
.research-header .navbar-nav {
    overflow: visible !important;
    z-index: 9999 !important;
}

/* Mobile responsive */
@media (max-width: 767.98px) {
    .research-header .dropdown-menu {
        position: static !important;
        box-shadow: none !important;
        border: none !important;
        border-radius: 0 !important;
        background: rgba(0,0,0,0.05) !important;
    }
    
    .research-header .dropdown-submenu > .dropdown-menu {
        position: static !important;
        margin-left: 1rem !important;
        box-shadow: none !important;
    }
}

/* ปรับปรุง CSS เพื่อแก้ไขปัญหา dropdown submenu ไม่แสดง */

/* ล้าง CSS debugging ที่ไม่จำเป็น */
.dropdown-submenu > .dropdown-menu {
    background-color: #fff !important;
    border: none !important;
    min-height: auto !important;
    min-width: 200px !important;
}

/* กำหนดให้ dropdown-submenu เป็น relative position เสมอ */
.dropdown-submenu {
    position: relative !important;
}

/* กำหนดตำแหน่งที่ถูกต้องสำหรับ dropdown-menu ใน dropdown-submenu */
.dropdown-submenu > .dropdown-menu {
    position: absolute !important;
    top: 0 !important;
    left: 100% !important;
    margin-top: -8px !important;
    z-index: 1001 !important;
    border-radius: 4px !important;
    box-shadow: 0 6px 12px rgba(0,0,0,.175) !important;
}

/* ตั้งค่า hover effect สำหรับ desktop */
@media (min-width: 768px) {
    .dropdown-submenu:hover > .dropdown-menu {
        display: block !important;
    }
}

/* ตั้งค่าลูกศรสำหรับ dropdown-toggle ใน dropdown-submenu */
.dropdown-submenu > a.dropdown-toggle::after {
    display: block !important;
    content: " " !important;
    float: right !important;
    width: 0 !important;
    height: 0 !important;
    border-color: transparent !important;
    border-style: solid !important;
    border-width: 5px 0 5px 5px !important;
    border-left-color: #333 !important;
    margin-top: 8px !important;
    margin-right: 0 !important;
}

/* สไตล์เมื่อมีการ hover */
.dropdown-submenu:hover > a.dropdown-toggle::after {
    border-left-color: #21a7d0 !important;
}

/* ทำให้ dropdown menu แสดงตามที่ควรจะเป็น */
.dropdown-menu {
    display: none;
}

.dropdown-menu.show {
    display: block !important;
}

/* กำหนด z-index ให้สูงกว่า rsmenu-main.css */
.navbar-nav .dropdown-menu {
    z-index: 20000 !important;
}

/* ทำให้เห็น dropdown menu ทั้งหมด */
.navbar,
.navbar-nav,
.research-header,
.dropdown,
.dropdown-submenu {
    overflow: visible !important;
}

/* กำหนดสีพื้นหลังของ dropdown-menu */
.dropdown-menu {
    background-color: white !important;
    border: none !important;
    border-radius: 4px !important;
    box-shadow: 0 6px 12px rgba(0,0,0,.175) !important;
}

/* กำหนดสไตล์ dropdown-item */
.dropdown-item {
    color: #212529 !important;
    padding: 8px 20px !important;
}

.dropdown-item:hover, 
.dropdown-item:focus {
    color: #21a7d0 !important;
    background-color: #f8f9fa !important;
}