@charset "utf-8";

/* ==========================================================================
   Base Styles (Mimicking 2012-2018 Korean public/academic sites)
   ========================================================================== */
body {
    font-family: 'Dotum', '돋움', 'Malgun Gothic', '맑은 고딕', sans-serif;
    color: #333;
    font-size: 13px;
    line-height: 1.6;
    background-color: #fff;
    -webkit-font-smoothing: none; /* Often looked a bit aliased back then */
}

a {
    color: #333;
    text-decoration: none;
}
a:hover, a:focus {
    color: #004b87;
    text-decoration: none;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.top-util {
    background-color: #f8f8f8;
    border-bottom: 1px solid #e5e5e5;
    padding: 5px 0;
    font-size: 11px;
}
.top-util a {
    color: #666;
    margin: 0 5px;
}

.header {
    padding: 10px 0 0 0;
    border-bottom: 2px solid #003366;
    background-color: #fff;
}
.logo-area h1 {
    margin: 0;
    font-size: 24px;
    font-weight: bold;
    color: #003366;
    letter-spacing: -1px;
    font-family: 'Malgun Gothic', sans-serif;
}
.logo-area p {
    margin: 3px 0 0 0;
    font-size: 11px;
    color: #666;
    font-family: Arial, sans-serif;
}

.gnb-area {
    padding-top: 15px;
}
.gnb {
    margin: 0;
}
.gnb li {
    padding: 0 12px;
}
.gnb li a {
    font-size: 15px;
    font-weight: bold;
    color: #333;
    font-family: 'Malgun Gothic', sans-serif;
}
.gnb li a:hover {
    color: #004b87;
}

/* ==========================================================================
   Main Visual
   ========================================================================== */
.main-visual {
    width: 100%;
    height: 350px;
    background-color: #1a365d;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    position: relative;
    border-bottom: 1px solid #002244;
}
.main-visual::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 20, 50, 0.6); /* Dark overlay to make text readable */
    z-index: 1;
}
.visual-content {
    position: relative;
    z-index: 2;
    padding-top: 100px;
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
}
.visual-content h2 {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
    font-family: 'Malgun Gothic', sans-serif;
    letter-spacing: -1px;
}
.visual-content p {
    font-size: 18px;
    margin-bottom: 30px;
    color: #e0eaf5;
}
.btn-intro {
    background-color: #004b87;
    border-color: #003366;
    border-radius: 0; /* Square button */
    font-family: 'Malgun Gothic', sans-serif;
    font-weight: bold;
    padding: 10px 30px;
    font-size: 15px;
    box-shadow: 1px 1px 0px rgba(0,0,0,0.2); /* Old-school subtle drop shadow */
}
.btn-intro:hover {
    background-color: #003366;
    border-color: #002244;
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */
.main-content {
    padding: 40px 15px;
}
.section-divider {
    border-top: 1px solid #e5e5e5;
    margin: 40px 0;
}

.section-title {
    font-size: 20px;
    font-weight: bold;
    color: #003366;
    margin-top: 0;
    margin-bottom: 20px;
    border-bottom: 2px solid #333;
    padding-bottom: 10px;
    font-family: 'Malgun Gothic', sans-serif;
    position: relative;
}
.section-title small {
    font-size: 12px;
    color: #888;
    font-family: Arial, sans-serif;
    font-weight: normal;
    margin-left: 5px;
}

/* Shortcut Cards */
.shortcut-cards {
    margin-top: 20px;
}
.card-item {
    border: 1px solid #ddd;
    padding: 25px 10px;
    background-color: #fdfdfd;
    transition: all 0.2s;
}
.card-item:hover {
    border-color: #004b87;
    background-color: #f4f8fb;
}
.icon-box {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px auto;
    border: 1px solid #eee;
    background-color: #fff;
    padding: 10px;
}
.icon-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.card-item h4 {
    font-size: 16px;
    font-weight: bold;
    color: #333;
    margin: 0;
    font-family: 'Malgun Gothic', sans-serif;
}

/* Institute Intro */
.intro-box {
    background-color: #f9f9f9;
    border: 1px solid #e0e0e0;
    padding: 20px;
    line-height: 1.8;
    color: #444;
}
.intro-box p {
    margin-bottom: 15px;
}
.intro-box p:last-child {
    margin-bottom: 0;
}

/* Notice Table (Recent Research) */
.more-btn {
    position: absolute;
    right: 0;
    bottom: 10px;
    font-size: 11px;
    color: #666;
    font-weight: normal;
    font-family: 'Dotum', sans-serif;
}
.notice-table {
    border-top: 1px solid #333;
    margin-bottom: 0;
}
.notice-table th {
    background-color: #f5f5f5;
    text-align: center;
    font-weight: bold;
    color: #333;
    border-bottom: 1px solid #ccc !important;
}
.notice-table td {
    border-bottom: 1px solid #e5e5e5;
    color: #555;
}
.notice-table td a {
    color: #333;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.notice-table td a:hover {
    text-decoration: underline;
}

/* Research Stats */
.section-stats {
    background-color: #f0f4f8;
    padding: 30px 20px;
    border: 1px solid #d9e3ed;
}
.section-stats .section-title {
    border-bottom: none;
    margin-bottom: 30px;
    padding-bottom: 0;
}
.stat-box {
    background: #fff;
    border: 1px solid #cbd6e2;
    padding: 20px 10px;
}
.stat-box h5 {
    font-size: 14px;
    color: #555;
    margin-top: 0;
    margin-bottom: 15px;
    font-weight: bold;
}
.stat-num {
    font-size: 28px;
    font-weight: bold;
    color: #004b87;
    margin: 0;
    font-family: 'Tahoma', sans-serif;
    display: inline-block;
}
.stat-unit {
    display: inline-block;
    font-size: 13px;
    color: #666;
    margin-left: 3px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #333;
    color: #999;
    padding: 30px 0;
    font-size: 12px;
    border-top: 5px solid #555;
}
.f-links {
    margin-bottom: 10px;
}
.f-links li {
    padding-left: 0;
    padding-right: 5px;
}
.f-links a {
    color: #ccc;
}
.f-links a:hover {
    color: #fff;
}
.footer address {
    margin-bottom: 0;
    line-height: 1.8;
    font-style: normal;
}

/* ==========================================================================
   Subpage Styles
   ========================================================================== */
.sub-visual {
    width: 100%;
    height: 180px;
    background-color: #003366;
    background-image: url('../images/main_banner.jpg');
    background-size: cover;
    background-position: center 30%;
    position: relative;
    border-bottom: 1px solid #002244;
}
.sub-visual::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 30, 70, 0.85); /* Darker overlay for subpages */
    z-index: 1;
}
.sub-visual .container {
    position: relative;
    z-index: 2;
    padding-top: 50px;
    color: #fff;
}
.sub-visual h2 {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 10px;
    font-family: 'Malgun Gothic', sans-serif;
    letter-spacing: -1px;
}
.sub-visual p {
    font-size: 14px;
    color: #cbd6e2;
}

.sub-content {
    padding: 50px 15px;
    min-height: 500px;
}
.content-section {
    margin-bottom: 50px;
}
.sub-title {
    font-size: 20px;
    font-weight: bold;
    color: #004b87;
    margin-top: 0;
    margin-bottom: 20px;
    border-bottom: 2px solid #003366;
    padding-bottom: 10px;
    font-family: 'Malgun Gothic', sans-serif;
}
.sub-title small {
    font-size: 12px;
    color: #999;
    font-family: Arial, sans-serif;
    font-weight: normal;
    margin-left: 8px;
}

/* Placeholders & Elements */
.placeholder-box {
    background-color: #f9f9f9;
    border: 1px dashed #ccc;
    padding: 30px;
    color: #555;
    line-height: 1.8;
}
.org-chart-placeholder {
    font-family: 'Dotum', sans-serif;
    font-weight: bold;
    color: #003366;
    font-size: 14px;
    line-height: 2.0;
}
.history-table th {
    background-color: #f5f5f5;
    text-align: center;
    border-top: 2px solid #333 !important;
}
.history-table td {
    border-top: 1px solid #ddd !important;
    color: #555;
}

/* Form Styles */
.form-container {
    background-color: #fdfdfd;
    border: 1px solid #e5e5e5;
    padding: 30px 20px;
    border-top: 3px solid #003366;
}
.form-horizontal .control-label {
    text-align: left;
    font-weight: bold;
    color: #333;
}

/* Active GNB State */
.gnb li.active a {
    color: #004b87;
    border-bottom: 2px solid #004b87;
    padding-bottom: 3px;
}

/* GNB Dropdown Hover */
.gnb .dropdown:hover .dropdown-menu {
    display: block;
    margin-top: 0;
}
.gnb .dropdown-menu {
    left: 50%;
    transform: translateX(-50%);
    min-width: 140px;
    text-align: center;
    border-top: 2px solid #004b87;
    border-radius: 0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 0;
}
.gnb .dropdown-menu > li > a {
    padding: 12px 15px;
    color: #333;
    border-bottom: 1px solid #eee;
}
.gnb .dropdown-menu > li > a:hover {
    background-color: #f5f5f5;
    color: #004b87;
    font-weight: bold;
}

/* Sub-nav Tab Menu (SNB) */
.snb-tabs {
    margin: -10px 0 40px 0;
    text-align: center;
    border-bottom: 2px solid #004b87;
}
.snb-tabs .btn {
    border-radius: 0;
    border: 1px solid #ddd;
    border-bottom: none;
    background-color: #f9f9f9;
    color: #555;
    font-size: 15px;
    padding: 12px 35px;
    font-weight: bold;
    margin: 0 -2px;
}
.snb-tabs .btn.active, .snb-tabs .btn:hover {
    background-color: #004b87;
    color: #fff;
    border-color: #004b87;
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 991px) {
    .header { padding-bottom: 20px; text-align: center; }
    .logo-area img { 
        height: 120px !important; 
        margin: 0 auto -20px auto !important; 
        display: block; 
    }
    .gnb-area { padding-top: 15px; }
    .gnb.list-inline.text-right { text-align: center !important; }
    .gnb { display: flex; flex-wrap: wrap; justify-content: center; }
    .gnb li { padding: 5px 8px; }
    
    .visual-content h2 { font-size: 24px; }
    .visual-content p { font-size: 14px; }
    
    .text-center-xs { text-align: center !important; }
    .footer-logo h2 { padding-top: 10px !important; }
    
    /* Timeline Mobile Fix */
    .timeline::after { left: 20px !important; }
    .timeline-item { width: 100% !important; padding-left: 50px !important; padding-right: 15px !important; }
    .timeline-item.right { left: 0 !important; }
    .timeline-item::after { left: 12px !important; top: 30px !important; right: auto !important; }
    
    /* Tables */
    .notice-table { font-size: 11px; }
    .stat-num { font-size: 20px; }
    .sub-title { font-size: 18px; }
}