/* ========================================
   GMMS SARLU DRC - Main Stylesheet
   ======================================== */

/* ===== CSS Variables ===== */
:root {
    /* Primary Colors */
    --primary-color: #1B5E20;
    --primary-light: #4CAF50;
    --primary-dark: #0D3B12;
    
    /* Secondary Colors */
    --secondary-color: #FFC107;
    --secondary-light: #FFD54F;
    --secondary-dark: #FFA000;
    
    /* Accent Colors */
    --accent-red: #C62828;
    --accent-blue: #1565C0;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --black: #000000;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-400: #BDBDBD;
    --gray-500: #9E9E9E;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-Index */
    --z-dropdown: 100;
    --z-header: 1000;
    --z-modal: 2000;
    --z-preloader: 9999;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: var(--line-height-base);
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ===== Utility Classes ===== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

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

/* ===== Preloader ===== */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-preloader);
    transition: opacity 0.5s ease, visibility 0.5s ease;
    display: none !important;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.loader-logo {
    width: 100px;
    height: auto;
    animation: pulse 1.5s ease-in-out infinite;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary-color);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

/* ===== Header & Navigation ===== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-header);
    transition: var(--transition-base);
}

#header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

#header.scrolled .nav-link {
    color: var(--gray-800);
}

#header.scrolled .logo-text {
    color: var(--gray-900);
}

.navbar {
    padding: var(--spacing-md) 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
    transition: var(--transition-base);
}

.logo-text .highlight {
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--white);
    padding: var(--spacing-sm) 0;
    position: relative;
}

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

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

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.dropdown-toggle i {
    font-size: 0.7rem;
    transition: var(--transition-base);
}

.dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-base);
}

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

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--gray-700);
    font-size: 0.9rem;
    transition: var(--transition-base);
}

.dropdown-menu a:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.lang-btn {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.lang-btn:hover,
.lang-btn.active {
    background: var(--secondary-color);
    color: var(--gray-900);
}

#header.scrolled .lang-btn {
    color: var(--gray-700);
}

#header.scrolled .lang-btn:hover,
#header.scrolled .lang-btn.active {
    background: var(--primary-color);
    color: var(--white);
}

.lang-separator {
    color: var(--white);
    opacity: 0.5;
}

#header.scrolled .lang-separator {
    color: var(--gray-400);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition-base);
}

#header.scrolled .hamburger span {
    background: var(--gray-800);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(27, 94, 32, 0.85) 0%,
        rgba(13, 59, 18, 0.9) 50%,
        rgba(0, 0, 0, 0.8) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--secondary-color);
    color: var(--gray-900);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
}

.badge-icon {
    font-size: 1.1rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.title-line {
    display: block;
}

.hero-title .highlight {
    color: var(--secondary-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

.hero-slogan {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-2xl);
}

.slogan-text {
    font-size: 1.5rem;
    color: var(--white);
}

.slogan-text strong {
    color: var(--secondary-color);
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--gray-900);
}

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

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

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

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

.btn-white:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn i {
    transition: var(--transition-base);
}

.btn:hover i {
    transform: translateX(3px);
}

/* Hero Scroll */
.hero-scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--white);
    font-size: 0.85rem;
    opacity: 0.8;
    transition: var(--transition-base);
}

.scroll-indicator:hover {
    opacity: 1;
}

.scroll-indicator i {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(10px); }
    60% { transform: translateY(5px); }
}

/* ===== Animations ===== */
.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.animate-slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

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

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Stats Section ===== */
.stats-section {
    background: var(--white);
    padding: var(--spacing-3xl) 0;
    margin-top: -50px;
    position: relative;
    z-index: 20;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
}

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

.stat-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.stat-icon i {
    font-size: 1.75rem;
    color: var(--white);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.stat-percent {
    font-size: 1.5rem;
}

.stat-unit {
    font-size: 1rem;
    color: var(--gray-600);
    margin-top: var(--spacing-xs);
}

.stat-label {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-top: var(--spacing-sm);
}

/* ===== Section Styles ===== */
.section-header {
    margin-bottom: var(--spacing-3xl);
}

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

.section-tag {
    display: inline-block;
    background: rgba(27, 94, 32, 0.1);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== About Preview Section ===== */
.about-preview-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-100);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text {
    font-size: 1.1rem;
    color: var(--gray-700);
    margin-bottom: var(--spacing-lg);
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.feature-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.feature-item span {
    font-size: 0.95rem;
    color: var(--gray-700);
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-wrapper img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.image-badge {
    position: absolute;
    bottom: 0;
    right: var(--spacing-xl);
    background: var(--secondary-color);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
}

.badge-year {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
}

.badge-text {
    font-size: 0.85rem;
    color: var(--gray-800);
}

/* ===== Poles Section ===== */
.poles-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.poles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.pole-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
}

.pole-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.pole-image {
    height: 200px;
    overflow: hidden;
    background: var(--gray-100);
}

.pole-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--spacing-sm);
    transition: var(--transition-slow);
}

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

.pole-icon {
    position: relative;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 2;
    margin: var(--spacing-lg) 0 0 var(--spacing-lg);
}

.pole-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.pole-content {
    padding: var(--spacing-lg);
}

.pole-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.pole-subtitle {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.pole-description {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.pole-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
}

.pole-link:hover {
    color: var(--primary-dark);
}

.pole-link i {
    transition: var(--transition-base);
}

.pole-link:hover i {
    transform: translateX(5px);
}

/* ===== CTA Section ===== */
.cta-section {
    position: relative;
    padding: var(--spacing-3xl) 0;
    min-height: 400px;
    display: flex;
    align-items: center;
}

.cta-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.cta-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cta-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    opacity: 0.95;
}

.cta-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.cta-text {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
}

/* ===== Partners Section ===== */
.partners-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-100);
}

.partners-slider {
    overflow: hidden;
    margin-top: var(--spacing-xl);
}

.partners-track {
    display: flex;
    animation: scroll 20s linear infinite;
}

.partner-logo {
    flex: 0 0 200px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--spacing-xl);
    filter: grayscale(100%);
    opacity: 0.6;
    transition: var(--transition-base);
}

.partner-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.partner-logo img {
    max-height: 60px;
    width: auto;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-900);
    color: var(--white);
}

.footer-top {
    padding: var(--spacing-3xl) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: var(--spacing-2xl);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.footer-logo img {
    height: 60px;
    width: auto;
}

.footer-logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
}

.footer-slogan {
    font-size: 0.95rem;
    color: var(--gray-400);
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.social-link i {
    font-size: 1rem;
    color: var(--white);
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--secondary-color);
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--gray-400);
    font-size: 0.95rem;
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: var(--spacing-sm);
}

.footer-contact li {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--gray-400);
    font-size: 0.9rem;
}

.footer-contact i {
    color: var(--secondary-color);
    font-size: 1rem;
    margin-top: 3px;
}

.footer-bottom {
    background: var(--black);
    padding: var(--spacing-lg) 0;
}

.footer-bottom-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-legal p {
    font-size: 0.8rem;
    color: var(--gray-500);
}

.made-in-congo {
    display: flex;
    align-items: center;
}

.made-in-congo img {
    display: block;
    height: 38px;
    width: auto;
}

.made-in-congo span {
    display: none;
}

.footer-copyright p {
    font-size: 0.9rem;
    color: var(--gray-500);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: var(--z-dropdown);
    box-shadow: var(--shadow-lg);
}

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

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