/* ========================================
   PKSF Website Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary: #00844a;
    --primary-dark: #0a6a3a;
    --primary-light: #e6f3ed;
    --text-dark: #333333;
    --text-gray: #666666;
    --border-gray: #e0e0e0;
    --white: #ffffff;
    --black: #000000;
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Hind Siliguri', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
}

@media (min-width: 1280px) {
    .container {
        padding: 0 4rem;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

/* Section Styles */
.section-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 3rem;
}

@media (min-width: 768px) {
    .section-header {
        flex-direction: row;
        align-items: flex-end;
        justify-content: space-between;
    }
}

.section-header.centered {
    text-align: center;
    align-items: center;
}

.section-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background-color: var(--primary-light);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 9999px;
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 2.5rem;
    }
}

@media (min-width: 1024px) {
    .section-title {
        font-size: 3rem;
    }
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-gray);
    max-width: 600px;
    margin-top: 1rem;
}

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    padding: 1rem 0;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    padding: 0.5rem 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo img {
    height: 3rem;
    width: auto;
    background-color: var(--white);
    padding: 0.25rem;
    border-radius: 0.5rem;
}

/* Navigation */
.main-nav {
    display: none;
}

@media (min-width: 1024px) {
    .main-nav {
        display: block;
    }
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    position: relative;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--white);
    padding: 0.5rem 0;
}

.header.scrolled .nav-link {
    color: var(--text-dark);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

/* Dropdown */
.nav-item.has-dropdown {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.nav-item.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown a {
    display: block;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.dropdown a:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

/* Header Actions */
.header-actions {
    display: none;
    align-items: center;
    gap: 0.75rem;
}

@media (min-width: 1024px) {
    .header-actions {
        display: flex;
    }
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 9999px;
    color: var(--white);
    transition: var(--transition);
}

.header.scrolled .social-link {
    color: var(--text-dark);
}

.social-link:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: none;
    border: none;
    color: var(--white);
    cursor: pointer;
}

.header.scrolled .mobile-menu-btn {
    color: var(--text-dark);
}

@media (min-width: 1024px) {
    .mobile-menu-btn {
        display: none;
    }
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--white);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border-gray);
}

.mobile-logo {
    height: 3rem;
}

.mobile-menu-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: none;
    border: none;
    color: var(--text-dark);
    cursor: pointer;
}

.mobile-nav {
    padding: 1rem;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-nav a {
    display: block;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
    border-radius: 0.5rem;
}

.mobile-nav a:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.hero-slider {
    position: relative;
    height: 100%;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

.hero-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    transition: transform 8s ease;
}

.hero-slide.active .hero-image {
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.4), transparent);
}

.hero-content {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    padding-top: 4rem;
}

.hero-content .container {
    width: 100%;
}

.hero-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background-color: rgba(0, 132, 74, 0.9);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 9999px;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 0.2s;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 1rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 0.3s;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 4rem;
    }
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 500px;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 0.4s;
}

.hero-content .btn {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 0.5s;
}

/* Slider Controls */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    border: none;
    border-radius: 9999px;
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.slider-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.slider-prev {
    left: 1rem;
}

.slider-next {
    right: 1rem;
}

@media (min-width: 768px) {
    .slider-btn {
        width: 3.5rem;
        height: 3.5rem;
    }
    
    .slider-prev {
        left: 2rem;
    }
    
    .slider-next {
        right: 2rem;
    }
}

/* Slider Dots */
.slider-dots {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.slider-dot {
    width: 0.5rem;
    height: 0.5rem;
    background-color: rgba(255, 255, 255, 0.5);
    border: none;
    border-radius: 9999px;
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    width: 2rem;
    background-color: var(--primary);
}

.slider-dot:hover {
    background-color: rgba(255, 255, 255, 0.8);
}

/* ========================================
   Stats Section
   ======================================== */
.stats {
    position: relative;
    padding: 4rem 0;
    background-color: var(--primary);
    overflow: hidden;
}

.stats-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.stats-decoration::before,
.stats-decoration::after {
    content: '';
    position: absolute;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.stats-decoration::before {
    width: 16rem;
    height: 16rem;
    top: -8rem;
    left: -8rem;
}

.stats-decoration::after {
    width: 24rem;
    height: 24rem;
    bottom: -12rem;
    right: -12rem;
}

.stats-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 3rem;
    }
}

.stat-item {
    text-align: center;
}

.stat-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.25rem;
}

@media (min-width: 768px) {
    .stat-number {
        font-size: 3.5rem;
    }
}

@media (min-width: 1024px) {
    .stat-number {
        font-size: 4rem;
    }
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

@media (min-width: 768px) {
    .stat-label {
        font-size: 1rem;
    }
}

/* ========================================
   News Section
   ======================================== */
.news {
    padding: 5rem 0;
    background-color: var(--white);
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.news-card {
    background-color: var(--white);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.news-link {
    display: block;
    height: 100%;
}

.news-image {
    position: relative;
    height: 12rem;
    overflow: hidden;
}

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

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

.news-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
}

.news-content {
    padding: 1.5rem;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-gray);
}

.news-date,
.news-views {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.news-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.news-card:hover .news-title {
    color: var(--primary);
}

.news-excerpt {
    font-size: 0.875rem;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-readmore {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    transition: var(--transition);
}

.news-card:hover .news-readmore {
    gap: 0.625rem;
}

/* ========================================
   Interventions Section
   ======================================== */
.interventions {
    padding: 5rem 0;
    background-color: var(--primary-light);
}

.interventions-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .interventions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .interventions-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.intervention-card {
    position: relative;
    height: 20rem;
    border-radius: 1rem;
    overflow: hidden;
    display: block;
}

@media (min-width: 640px) {
    .intervention-card:nth-child(2),
    .intervention-card:nth-child(4),
    .intervention-card:nth-child(6),
    .intervention-card:nth-child(8) {
        margin-top: 1.25rem;
    }
}

.intervention-image {
    position: absolute;
    inset: 0;
}

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

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

.intervention-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.4), transparent);
    transition: var(--transition);
}

.intervention-card:hover .intervention-overlay {
    background: linear-gradient(to top, rgba(0, 132, 74, 0.95), rgba(0, 132, 74, 0.7), rgba(0, 132, 74, 0.3));
}

.intervention-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    color: var(--white);
}

.intervention-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    background-color: rgba(0, 132, 74, 0.8);
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.intervention-card:hover .intervention-icon {
    background-color: var(--white);
    color: var(--primary);
}

.intervention-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.intervention-desc {
    font-size: 0.875rem;
    line-height: 1.5;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.intervention-card:hover .intervention-desc {
    opacity: 1;
    max-height: 5rem;
}

/* ========================================
   Gallery Section
   ======================================== */
.gallery {
    padding: 5rem 0;
    background-color: var(--white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.gallery-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 1rem;
    overflow: hidden;
    cursor: pointer;
}

.gallery-item.large {
    grid-column: span 2;
    grid-row: span 2;
}

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

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    display: flex;
    align-items: flex-end;
    padding: 1rem;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-title {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: #1f2937;
    color: var(--white);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    padding: 4rem 0;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
    }
}

.footer-logo {
    height: 5rem;
    background-color: var(--white);
    padding: 0.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
}

.footer-desc {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-social .social-link {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

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

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-link::before {
    content: '';
    width: 0;
    height: 0;
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
    border-left: 6px solid var(--primary);
    opacity: 0;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--white);
}

.footer-link:hover::before {
    opacity: 1;
    width: auto;
    height: auto;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
}

.contact-item svg {
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.contact-item a {
    color: rgba(255, 255, 255, 0.7);
}

.contact-item a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0;
}

.footer-bottom-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

@media (min-width: 768px) {
    .footer-bottom-content {
        flex-direction: row;
        justify-content: space-between;
    }
}

.copyright {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.footer-bottom-links a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links a:hover {
    color: var(--white);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Selection */
::selection {
    background-color: var(--primary);
    color: var(--white);
}

/* Focus */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}