:root {
    --bg-color: #0f172a; /* Slate 900 */
    --text-main: #f8fafc; /* Slate 50 */
    --text-muted: #cbd5e1; /* Slate 300 */
    --primary: #10b981; /* Emerald 500 */
    --primary-hover: #059669; /* Emerald 600 */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: 'Noto Sans Bengali', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

body {
    position: relative;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Dynamic Background Shapes */
.bg-shape {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    animation: float 20s infinite alternate;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: rgba(16, 185, 129, 0.15); /* Emerald tint */
    top: -200px;
    right: -100px;
}

.shape-2 {
    width: 500px;
    height: 500px;
    background: rgba(59, 130, 246, 0.15); /* Blue tint */
    bottom: -100px;
    left: -200px;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-50px, 50px) scale(1.1); }
}

/* Watermark */
.bg-watermark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80vw;
    height: 80vh;
    background-image: url('assets/bnp_logo.svg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.12; /* Increased opacity for more contrast */
    z-index: -2;
    pointer-events: none;
}

/* Glassmorphism Utilities */
.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* Typography & General */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
}

p {
    line-height: 1.6;
    color: var(--text-muted);
}

a {
    text-decoration: none;
    color: inherit;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-logo img {
    height: 45px;
    width: auto;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 2px 5px rgba(255, 255, 255, 0.1));
}

.nav-logo:hover img {
    transform: scale(1.05);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

/* Navbar Scrolled State */
.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    padding: 0.8rem 0;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-main);
    border-radius: 5px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.6);
}

/* Layout Utilities */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-offset {
    padding-top: 100px;
    margin-bottom: 80px;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.divider {
    height: 4px;
    width: 60px;
    background: var(--primary);
    margin: 0 auto;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    background-image: linear-gradient(to bottom, rgba(15, 23, 42, 0.15) 30%, rgba(15, 23, 42, 0.8) 100%), url('assets/hero_cover.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.hero-content {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 2rem;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(16, 185, 129, 0.2);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.hero-text {
    background: rgba(15, 23, 42, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.hero-text .title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 20px rgba(0,0,0,0.8);
}

.hero-text .highlight {
    color: var(--primary);
}

.hero-text .subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-image-container {
    border-radius: 24px;
    overflow: hidden;
    padding: 10px;
    max-width: 400px;
    margin-right: auto;
    margin-left: 0;
    transform: perspective(1000px) rotateY(5deg);
    transition: transform 0.5s ease;
    box-shadow: 0 0 40px rgba(16, 185, 129, 0.4), 0 0 80px rgba(16, 185, 129, 0.2); /* Subtle initial glow */
}

.hero-image-container:hover {
    transform: perspective(1000px) rotateY(0deg) scale(1.02);
    box-shadow: 0 0 60px rgba(16, 185, 129, 0.6), 0 0 100px rgba(16, 185, 129, 0.3); /* Enhanced glow on hover */
}

.hero-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
    object-fit: cover;
}

/* Social Links in Hero */
.social-links {
    display: flex;
    gap: 1.2rem;
    margin-bottom: 2rem;
}

.social-icon {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-icon:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 184, 148, 0.3);
    border-color: transparent;
}

/* Footer Social */
.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 1.5rem;
}

.footer-social a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.3rem;
    transition: color 0.3s ease;
}

.footer-social a:hover {
    color: var(--primary);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.about-card {
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: transform 0.3s ease, background 0.3s ease;
}

.about-card.hover-float:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
}

.about-card .icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #fff;
}

/* Career Timeline Section */
.timeline {
    padding: 3rem;
    border-radius: 24px;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 4rem;
    bottom: 4rem;
    left: calc(3rem + 9px);
    width: 2px;
    background: var(--glass-border);
}

.timeline-item {
    display: flex;
    gap: 3rem;
    margin-bottom: 3rem;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    margin-top: 5px;
    position: relative;
    z-index: 2;
    box-shadow: 0 0 15px var(--primary);
}

.timeline-content {
    flex: 1;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.timeline-content .date {
    display: inline-block;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Projects Gallery Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card {
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
}

.project-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
}

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

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-info {
    padding: 2rem;
}

.project-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--primary);
}

.project-info p {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Gallery Filters */
.gallery-filters {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(255, 107, 107, 0.3);
}

/* Map Section */
.map-container-wrapper {
    padding: 1.5rem;
    border-radius: 24px;
    height: 500px;
    overflow: hidden;
}

#map {
    width: 100%;
    height: 100%;
    border-radius: 16px;
    background: #111;
    z-index: 1;
}

/* Dark Map Customization */
.leaflet-container {
    background: #111 !important;
}

.leaflet-tile {
    filter: invert(100%) hue-rotate(180deg) brightness(95%) contrast(90%);
}

.leaflet-popup-content-wrapper {
    background: rgba(20, 20, 20, 0.9);
    backdrop-filter: blur(10px);
    color: #fff;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.leaflet-popup-tip {
    background: rgba(20, 20, 20, 0.9);
}

@media (max-width: 768px) {
    .map-container-wrapper {
        height: 400px;
        padding: 0.8rem;
    }
}

/* Responsive adjustment for projects */
@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* Video Gallery Section */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 3rem;
}

.video-card {
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    background: #000;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-info {
    padding: 1.5rem 2rem;
}

.video-info h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.video-info p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive adjustment for videos */
@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* News & Updates Section */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.news-card {
    padding: 2rem;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.news-date {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.news-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: #fff;
    line-height: 1.4;
}

.news-content p {
    font-size: 0.95rem;
    opacity: 0.8;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.read-more {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: letter-spacing 0.3s ease;
}

.read-more:hover {
    letter-spacing: 2px;
}

/* Constituent Portal Section */
.contact-box {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem;
    border-radius: 32px;
}

.portal-header {
    margin-bottom: 3rem;
    text-align: center;
}

.portal-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.portal-form {
    text-align: left;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
    margin-left: 0.5rem;
}

.portal-form input,
.portal-form textarea,
.portal-form select {
    width: 100%;
    padding: 1.2rem 1.5rem;
    border-radius: 14px;
    border: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.portal-form select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.5rem center;
    background-size: 1rem;
}

.portal-form input:focus,
.portal-form textarea:focus,
.portal-form select:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 15px rgba(255, 107, 107, 0.1);
}

.portal-btn {
    width: 100%;
    padding: 1.3rem;
    font-size: 1.1rem;
    margin-top: 1rem;
    font-weight: 700;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    .contact-box {
        padding: 2.5rem 1.5rem;
    }
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--glass-border);
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Scroll Progress Bar */
.scroll-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: transparent;
    z-index: 10000;
}

.scroll-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary);
    transition: width 0.1s ease;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--glass-shadow);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(16, 185, 129, 0.4);
    border-color: transparent;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text .title {
        font-size: 3rem;
    }
    
    .hero-image-container {
        margin: 0 auto;
        transform: none;
    }
    
    .hero-image-container:hover {
        transform: scale(1.02);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(15px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: right 0.4s ease;
        box-shadow: -5px 0 15px rgba(0,0,0,0.5);
        z-index: 1000;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        margin: 1.5rem 0;
    }

    .nav-links a {
        font-size: 1.2rem;
    }
    
    .timeline::before {
        left: 2rem;
    }
    
    .timeline-item {
        gap: 1.5rem;
    }
    
    .timeline-dot {
        margin-left: -5px; /* adjust for line */
    }
    
    .contact-box {
        padding: 2rem;
    }
}

/* Hero Scroll Animations */
.animate-hero-img {
    opacity: 0;
    transform: translateX(-100px) perspective(1000px) rotateY(-10deg);
    transition: all 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.animate-hero-img.visible {
    opacity: 1;
    transform: translateX(0) perspective(1000px) rotateY(5deg);
}

/* Ensure hover state still works after visible */
.animate-hero-img.visible:hover {
    transform: perspective(1000px) rotateY(0deg) scale(1.02);
}

.animate-hero-text {
    opacity: 0;
    transform: translateX(100px);
    transition: all 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.animate-hero-text.visible {
    opacity: 1;
    transform: translateX(0);
}