/* ============================================
   สำนักเทคโนโลยีสารสนเทศ มหาวิทยาลัยนอร์ทกรุงเทพ
   NBU IT - Main Stylesheet
   Color Theme: Blue
   ============================================ */

/* --- CSS Variables --- */
:root {
    --nbu-primary: #003087;
    --nbu-primary-dark: #001f5c;
    --nbu-primary-light: #0050b3;
    --nbu-secondary: #1a6fc4;
    --nbu-accent: #4da3ff;
    --nbu-gold: #c8a84e;
    --nbu-white: #ffffff;
    --nbu-light-bg: #f4f7fb;
    --nbu-gray: #6c757d;
    --nbu-dark: #1a1a2e;
    --nbu-text: #333333;
    --nbu-text-light: #666666;
    --nbu-border: #dee2e6;
    --nbu-shadow: 0 2px 15px rgba(0, 48, 135, 0.1);
    --nbu-shadow-hover: 0 8px 30px rgba(0, 48, 135, 0.2);
    --nbu-transition: all 0.3s ease;
    --nbu-radius: 8px;
}

/* --- Reset & Base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Sarabun', 'Open Sans', sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: var(--nbu-text);
    background-color: var(--nbu-white);
    overflow-x: hidden;
}

a {
    color: var(--nbu-primary);
    text-decoration: none;
    transition: var(--nbu-transition);
}

a:hover {
    color: var(--nbu-secondary);
    text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Sarabun', 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--nbu-dark);
    line-height: 1.4;
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Utility --- */
.section-padding {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--nbu-primary);
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--nbu-primary), var(--nbu-accent));
    border-radius: 2px;
}

.section-title p {
    color: var(--nbu-text-light);
    font-size: 18px;
    margin-top: 15px;
}

.btn-nbu {
    display: inline-block;
    padding: 10px 28px;
    background: var(--nbu-primary);
    color: var(--nbu-white);
    border: 2px solid var(--nbu-primary);
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--nbu-transition);
    cursor: pointer;
    text-align: center;
}

.btn-nbu:hover {
    background: transparent;
    color: var(--nbu-primary);
}

.btn-nbu-outline {
    display: inline-block;
    padding: 10px 28px;
    background: transparent;
    color: var(--nbu-white);
    border: 2px solid var(--nbu-white);
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--nbu-transition);
    cursor: pointer;
}

.btn-nbu-outline:hover {
    background: var(--nbu-white);
    color: var(--nbu-primary);
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar-nbu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 48, 135, 0.95);
    backdrop-filter: blur(10px);
    padding: 0;
    transition: var(--nbu-transition);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar-nbu.scrolled {
    background: rgba(0, 48, 135, 0.98);
    padding: 0;
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.2);
}

.navbar-nbu .navbar-brand {
    display: flex;
    align-items: center;
    padding: 8px 0;
    color: var(--nbu-white);
    font-weight: 700;
    font-size: 16px;
}

.navbar-nbu .navbar-brand img {
    height: 50px;
    margin-right: 12px;
}

.navbar-nbu .brand-text {
    line-height: 1.3;
}

.navbar-nbu .brand-text .brand-main {
    display: block;
    font-size: 15px;
    font-weight: 700;
    color: var(--nbu-white);
}

.navbar-nbu .brand-text .brand-sub {
    display: block;
    font-size: 11px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.8);
}

.navbar-nbu .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-size: 14px;
    font-weight: 500;
    padding: 20px 14px !important;
    transition: var(--nbu-transition);
    position: relative;
}

.navbar-nbu .nav-link:hover,
.navbar-nbu .nav-link.active {
    color: var(--nbu-white) !important;
    background: rgba(255, 255, 255, 0.1);
}

.navbar-nbu .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--nbu-gold);
    transition: var(--nbu-transition);
    transform: translateX(-50%);
}

.navbar-nbu .nav-link:hover::after,
.navbar-nbu .nav-link.active::after {
    width: 80%;
}

.navbar-nbu .dropdown-menu {
    background: var(--nbu-white);
    border: none;
    border-radius: var(--nbu-radius);
    box-shadow: var(--nbu-shadow-hover);
    padding: 10px 0;
    margin-top: 0;
    min-width: 240px;
}

.navbar-nbu .dropdown-item {
    color: var(--nbu-text);
    padding: 10px 20px;
    font-size: 14px;
    transition: var(--nbu-transition);
}

.navbar-nbu .dropdown-item:hover {
    background: var(--nbu-light-bg);
    color: var(--nbu-primary);
    padding-left: 25px;
}

.navbar-nbu .dropdown-item i {
    margin-right: 8px;
    color: var(--nbu-primary);
    width: 16px;
    text-align: center;
}

.navbar-toggler {
    border: none;
    color: var(--nbu-white);
    font-size: 24px;
    padding: 8px 12px;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--nbu-primary-dark) 0%, var(--nbu-primary) 50%, var(--nbu-secondary) 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.unsplash.com/photo-1562774053-701939374585?w=1920&q=80') center/cover no-repeat;
    opacity: 0.15;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.hero-particles .particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: float-particle 15s infinite linear;
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

@keyframes float-particle {
    0% { transform: translate3d(0, 100vh, 0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translate3d(0, -10vh, 0); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--nbu-white);
    padding: 0 20px;
}

.hero-content .hero-logo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.hero-content .hero-logo i {
    font-size: 50px;
    color: var(--nbu-white);
}

.hero-content h1 {
    font-size: 42px;
    font-weight: 700;
    color: var(--nbu-white);
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-content h2 {
    font-size: 22px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
}

.hero-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto 35px;
}

.hero-buttons .btn-nbu-outline {
    margin: 5px 8px;
}

.hero-scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: var(--nbu-white);
    font-size: 28px;
    animation: bounce 2s infinite;
    cursor: pointer;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-15px); }
    60% { transform: translateX(-50%) translateY(-8px); }
}

/* ============================================
   QUICK ACCESS
   ============================================ */
.quick-access {
    margin-top: -60px;
    position: relative;
    z-index: 10;
    padding-bottom: 40px;
}

.quick-access-card {
    background: var(--nbu-white);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--nbu-shadow);
    transition: var(--nbu-transition);
    height: 100%;
    border: 1px solid rgba(0, 48, 135, 0.05);
}

.quick-access-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--nbu-shadow-hover);
}

.quick-access-card .qa-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--nbu-primary), var(--nbu-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    transition: var(--nbu-transition);
}

.quick-access-card:hover .qa-icon {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(0, 48, 135, 0.3);
}

.quick-access-card .qa-icon i {
    font-size: 28px;
    color: var(--nbu-white);
}

.quick-access-card h5 {
    font-size: 16px;
    font-weight: 700;
    color: var(--nbu-primary);
    margin-bottom: 8px;
}

.quick-access-card p {
    font-size: 13px;
    color: var(--nbu-text-light);
    margin-bottom: 0;
}

/* ============================================
   ANNOUNCEMENTS BANNER
   ============================================ */
.announcement-banner {
    background: linear-gradient(135deg, var(--nbu-primary-dark), var(--nbu-primary));
    color: var(--nbu-white);
    padding: 20px 0;
    position: relative;
    overflow: hidden;
}

.announcement-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.announcement-banner .marquee-text {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 16px;
}

.announcement-banner .badge-announce {
    background: var(--nbu-gold);
    color: var(--nbu-primary-dark);
    padding: 5px 15px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 13px;
    white-space: nowrap;
}

/* ============================================
   FEATURED NEWS CAROUSEL
   ============================================ */
.featured-news {
    background: var(--nbu-light-bg);
}

.news-slide {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--nbu-shadow);
    height: 350px;
}

.news-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-slide:hover img {
    transform: scale(1.05);
}

.news-slide .news-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
    color: var(--nbu-white);
}

.news-slide .news-overlay .news-tag {
    display: inline-block;
    background: var(--nbu-primary);
    color: var(--nbu-white);
    padding: 3px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
}

.news-slide .news-overlay h4 {
    color: var(--nbu-white);
    font-size: 18px;
    margin-bottom: 5px;
}

.news-slide .news-overlay p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0;
}

/* Owl Carousel Custom */
.owl-theme .owl-nav [class*='owl-'] {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--nbu-primary) !important;
    color: var(--nbu-white) !important;
    font-size: 18px;
    line-height: 45px;
    margin: 0 8px;
    transition: var(--nbu-transition);
    border: none;
}

.owl-theme .owl-nav [class*='owl-']:hover {
    background: var(--nbu-primary-dark) !important;
    transform: scale(1.1);
}

.owl-theme .owl-dots .owl-dot span {
    width: 12px;
    height: 12px;
    background: var(--nbu-border);
    transition: var(--nbu-transition);
}

.owl-theme .owl-dots .owl-dot.active span,
.owl-theme .owl-dots .owl-dot:hover span {
    background: var(--nbu-primary);
    width: 30px;
    border-radius: 10px;
}

/* ============================================
   NEWS GRID
   ============================================ */
.news-card {
    background: var(--nbu-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--nbu-shadow);
    transition: var(--nbu-transition);
    height: 100%;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--nbu-shadow-hover);
}

.news-card .card-img-wrapper {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.news-card .card-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .card-img-wrapper img {
    transform: scale(1.1);
}

.news-card .card-img-wrapper .card-date {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--nbu-primary);
    color: var(--nbu-white);
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.news-card .card-body {
    padding: 20px;
}

.news-card .card-body h5 {
    font-size: 16px;
    font-weight: 700;
    color: var(--nbu-dark);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card .card-body p {
    font-size: 14px;
    color: var(--nbu-text-light);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 15px;
}

.news-card .card-body .read-more {
    color: var(--nbu-primary);
    font-weight: 600;
    font-size: 14px;
}

.news-card .card-body .read-more i {
    transition: transform 0.3s ease;
    margin-left: 5px;
}

.news-card .card-body .read-more:hover i {
    transform: translateX(5px);
}

/* ============================================
   VISION / PARALLAX
   ============================================ */
.vision-section {
    position: relative;
    background: linear-gradient(135deg, var(--nbu-primary-dark) 0%, var(--nbu-primary) 100%);
    padding: 100px 0;
    color: var(--nbu-white);
    text-align: center;
    overflow: hidden;
}

.vision-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.unsplash.com/photo-1517245386807-bb43f82c33c4?w=1920&q=80') center/cover no-repeat;
    opacity: 0.1;
}

.vision-section .vision-content {
    position: relative;
    z-index: 2;
}

.vision-section h2 {
    color: var(--nbu-white);
    font-size: 36px;
    margin-bottom: 25px;
}

.vision-section p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin: 0 auto 20px;
    line-height: 2;
}

.vision-section .vision-stats {
    margin-top: 50px;
}

.vision-stat-item {
    padding: 20px;
}

.vision-stat-item .stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--nbu-gold);
    display: block;
}

.vision-stat-item .stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   SERVICES
   ============================================ */
.services-section {
    background: var(--nbu-white);
}

.service-card {
    background: var(--nbu-white);
    border-radius: 12px;
    padding: 35px 25px;
    text-align: center;
    box-shadow: var(--nbu-shadow);
    transition: var(--nbu-transition);
    height: 100%;
    border: 1px solid rgba(0, 48, 135, 0.05);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--nbu-primary), var(--nbu-accent));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--nbu-shadow-hover);
}

.service-card .service-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--nbu-light-bg), rgba(0, 48, 135, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--nbu-transition);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--nbu-primary), var(--nbu-secondary));
}

.service-card .service-icon i {
    font-size: 32px;
    color: var(--nbu-primary);
    transition: var(--nbu-transition);
}

.service-card:hover .service-icon i {
    color: var(--nbu-white);
}

.service-card h5 {
    font-size: 16px;
    font-weight: 700;
    color: var(--nbu-primary);
    margin-bottom: 10px;
}

.service-card p {
    font-size: 13px;
    color: var(--nbu-text-light);
    margin-bottom: 15px;
}

.service-card .service-link {
    color: var(--nbu-primary);
    font-weight: 600;
    font-size: 14px;
}

.service-card .service-link:hover {
    color: var(--nbu-secondary);
}

/* ============================================
   DOCUMENTS / E-BOOKS
   ============================================ */
.documents-section {
    background: var(--nbu-light-bg);
}

.doc-card {
    background: var(--nbu-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--nbu-shadow);
    transition: var(--nbu-transition);
    height: 100%;
}

.doc-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--nbu-shadow-hover);
}

.doc-card .doc-thumbnail {
    height: 220px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--nbu-primary), var(--nbu-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
}

.doc-card .doc-thumbnail i {
    font-size: 60px;
    color: rgba(255, 255, 255, 0.5);
}

.doc-card .doc-info {
    padding: 20px;
}

.doc-card .doc-info h5 {
    font-size: 15px;
    font-weight: 700;
    color: var(--nbu-dark);
    margin-bottom: 8px;
}

.doc-card .doc-info p {
    font-size: 13px;
    color: var(--nbu-text-light);
    margin-bottom: 12px;
}

/* ============================================
   FAQ
   ============================================ */
.faq-section {
    background: var(--nbu-white);
}

.faq-item {
    background: var(--nbu-white);
    border: 1px solid var(--nbu-border);
    border-radius: var(--nbu-radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--nbu-transition);
}

.faq-item:hover {
    border-color: var(--nbu-primary);
}

.faq-item .faq-question {
    padding: 18px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--nbu-dark);
    transition: var(--nbu-transition);
}

.faq-item .faq-question:hover {
    color: var(--nbu-primary);
}

.faq-item .faq-question i {
    transition: transform 0.3s ease;
    color: var(--nbu-primary);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-item .faq-answer {
    display: none;
    padding: 0 25px 18px;
    color: var(--nbu-text-light);
    line-height: 1.8;
    border-top: 1px solid var(--nbu-border);
    padding-top: 15px;
}

.faq-item.active .faq-answer {
    display: block;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
    background: var(--nbu-light-bg);
}

.contact-info-card {
    background: var(--nbu-white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--nbu-shadow);
    height: 100%;
}

.contact-info-card .contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
}

.contact-info-card .contact-item i {
    width: 45px;
    height: 45px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--nbu-primary), var(--nbu-secondary));
    color: var(--nbu-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-right: 15px;
    flex-shrink: 0;
}

.contact-info-card .contact-item h6 {
    font-size: 14px;
    font-weight: 700;
    color: var(--nbu-dark);
    margin-bottom: 3px;
}

.contact-info-card .contact-item p {
    font-size: 14px;
    color: var(--nbu-text-light);
    margin-bottom: 0;
}

.contact-info-card .social-links {
    display: flex;
    gap: 10px;
}

.contact-info-card .social-links a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--nbu-light);
    color: var(--nbu-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.contact-info-card .social-links a:hover {
    background: var(--nbu-primary);
    color: #fff;
}

.map-wrapper {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--nbu-shadow);
    height: 100%;
    min-height: 350px;
}

.map-wrapper iframe {
    width: 100%;
    height: 100%;
    min-height: 350px;
    border: none;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: linear-gradient(180deg, var(--nbu-primary-dark) 0%, #000c24 100%);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 0;
}

.footer h5 {
    color: var(--nbu-white);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer h5::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--nbu-gold);
    border-radius: 2px;
}

.footer p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
}

.footer .footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.footer .footer-logo img {
    height: 55px;
    margin-right: 12px;
}

.footer .footer-logo .footer-brand-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--nbu-white);
    line-height: 1.4;
}

.footer .footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer .footer-links li {
    margin-bottom: 10px;
}

.footer .footer-links li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--nbu-transition);
}

.footer .footer-links li a:hover {
    color: var(--nbu-white);
    padding-left: 8px;
}

.footer .footer-links li a i {
    margin-right: 8px;
    font-size: 12px;
    color: var(--nbu-gold);
}

.footer .social-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.footer .social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--nbu-white);
    font-size: 16px;
    transition: var(--nbu-transition);
}

.footer .social-links a:hover {
    background: var(--nbu-primary-light);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--nbu-primary);
    color: var(--nbu-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--nbu-transition);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(0, 48, 135, 0.3);
    border: none;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--nbu-primary-dark);
    transform: translateY(-3px);
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 991px) {
    .navbar-nbu .navbar-collapse {
        background: var(--nbu-primary-dark);
        padding: 15px;
        border-radius: 0 0 12px 12px;
        max-height: 80vh;
        overflow-y: auto;
    }

    .navbar-nbu .nav-link {
        padding: 12px 15px !important;
    }

    .navbar-nbu .nav-link::after {
        display: none;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-content h2 {
        font-size: 18px;
    }

    .section-padding {
        padding: 50px 0;
    }

    .section-title h2 {
        font-size: 26px;
    }

    .quick-access {
        margin-top: -40px;
    }

    .vision-section {
        padding: 60px 0;
    }

    .vision-stat-item .stat-number {
        font-size: 36px;
    }
}

@media (max-width: 767px) {
    .hero-content h1 {
        font-size: 24px;
    }

    .hero-content p {
        font-size: 15px;
    }

    .quick-access-card {
        margin-bottom: 15px;
    }

    .news-slide {
        height: 280px;
    }

    .section-padding {
        padding: 40px 0;
    }

    .footer {
        text-align: center;
    }

    .footer h5::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer .social-links {
        justify-content: center;
    }
}

/* ============================================
   CALENDAR SECTION
   ============================================ */
.calendar-section {
    background: var(--nbu-light-bg);
}

.calendar-wrapper {
    background: var(--nbu-white);
    border-radius: 12px;
    box-shadow: var(--nbu-shadow);
    overflow: hidden;
}

.calendar-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--nbu-primary), var(--nbu-secondary));
    color: var(--nbu-white);
}

.calendar-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 500;
}

.calendar-info i {
    font-size: 18px;
    color: var(--nbu-gold);
}

.btn-calendar-open {
    display: inline-flex;
    align-items: center;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.15);
    color: var(--nbu-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--nbu-transition);
}

.btn-calendar-open:hover {
    background: rgba(255, 255, 255, 0.25);
    color: var(--nbu-white);
}

.calendar-embed {
    position: relative;
    width: 100%;
}

.calendar-embed iframe {
    display: block;
    width: 100%;
    height: 600px;
}

@media (max-width: 768px) {
    .calendar-toolbar {
        flex-direction: column;
        gap: 12px;
        text-align: center;
        padding: 14px 16px;
    }

    .calendar-embed iframe {
        height: 450px;
    }
}

@media (max-width: 576px) {
    .calendar-embed iframe {
        height: 380px;
    }
}