/* Base Styles & Variables */
:root {
    /* Color Palette */
    --color-dark: #1a1a1a;
    --color-darker: #0d0d0d;
    --color-light: #f8f9fa;
    --color-primary: #2ecc71;  /* Green accent */
    --color-secondary: #3498db;  /* Blue accent */
    --color-accent: #f1c40f;  /* Yellow accent */
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f5f5;
    
    /* Typography */
    --font-primary: 'Share Tech', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-unit: 1rem;
    --container-width: 1200px;
    --section-padding: 5rem 0;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

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

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--color-darker);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a:hover {
    color: var(--color-secondary);
}

p {
    margin-bottom: 1rem;
}

ul, ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

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

/* Layout */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.section {
    padding: var(--section-padding);
}

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

.section-header .underline {
    width: 80px;
    height: 4px;
    background: var(--color-primary);
    margin: 1rem auto 2rem;
    position: relative;
}

.section-header .underline::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 4px;
    background: var(--color-secondary);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: transparent;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    padding: 1.5rem 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background-color: rgba(13, 13, 13, 0.9);
    padding: 0.8rem 0;
    box-shadow: var(--shadow-md);
}

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

.logo h1 {
    color: white;
    font-size: 1.75rem;
    margin: 0;
    letter-spacing: 1px;
}

.nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav li {
    margin-left: 2rem;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: white;
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding: 0 var(--spacing-unit);
    overflow: hidden;
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                      url('background_img.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: white;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.hero-overlay {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.1) 0%, rgba(52, 152, 219, 0.1) 100%);
    z-index: 1;
}

/* About Section */
.about-section {
    background-color: var(--color-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--color-text-light);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    text-align: center;
}

.stat-item {
    padding: 2rem 1rem;
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-weight: 500;
}

/* Operations Section */
.operations-section {
    background-color: var(--color-bg-alt);
}

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

.operation-card {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid #eee;
}

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

.operation-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.operation-card h3 {
    margin-bottom: 1rem;
    color: var(--color-darker);
}

.operation-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Sustainability Section */
.sustainability-section {
    background-color: var(--color-bg);
}

.sustainability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.sustainability-text p {
    margin-bottom: 2rem;
    color: var(--color-text-light);
}

.impact-item {
    display: flex;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}

.impact-item i {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-right: 1rem;
    margin-top: 0.25rem;
}

.impact-item h4 {
    margin-bottom: 0.5rem;
    color: var(--color-darker);
}

.impact-item p {
    margin: 0;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.infographic {
    position: relative;
    width: 100%;
    height: 400px;
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: 600;
    text-align: center;
    padding: 1rem;
    position: relative;
    z-index: 1;
}

.circle::before {
    content: '';
    position: absolute;
    width: calc(100% + 10px);
    height: calc(100% + 10px);
    border: 2px dashed var(--color-primary);
    border-radius: 50%;
    animation: rotate 30s linear infinite;
    z-index: -1;
}

.steps {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.steps div {
    position: absolute;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-darker);
    background-color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    min-width: 100px;
    text-align: center;
}

.steps div:nth-child(1) { top: 20%; left: 10%; }
.steps div:nth-child(2) { top: 10%; right: 15%; }
.steps div:nth-child(3) { bottom: 20%; right: 10%; }
.steps div:nth-child(4) { bottom: 10%; left: 15%; }

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Vision & Mission Section */
.vision-mission {
    background-color: var(--color-bg-alt);
}

.vm-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.vm-card {
    background-color: white;
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.vm-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.vm-card h3 {
    margin-bottom: 1.5rem;
    color: var(--color-darker);
    position: relative;
    padding-bottom: 1rem;
}

.vm-card h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
}

.vm-card p, .vm-card ul {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.vm-card ul {
    list-style: none;
    padding-left: 0;
}

.vm-card li {
    margin-bottom: 0.75rem;
    padding-left: 1.75rem;
    position: relative;
}

.vm-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Contact Section */
.contact-section {
    background-color: var(--color-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-form {
    background-color: white;
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-darker);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.info-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-right: 1.5rem;
    margin-top: 0.25rem;
}

.info-item h4 {
    margin-bottom: 0.5rem;
    color: var(--color-darker);
}

.info-item p {
    margin: 0;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Footer */
.footer {
    background-color: var(--color-darker);
    color: rgba(255, 255, 255, 0.7);
    padding: 5rem 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-about h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-about p {
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.1rem;
    transition: all var(--transition-normal);
}

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

.footer h4 {
    color: white;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.75rem;
}

.footer h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
}

.footer-links ul,
.footer-legal ul {
    list-style: none;
    padding: 0;
}

.footer-links li,
.footer-legal li {
    margin-bottom: 0.75rem;
}

.footer-links a,
.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-normal), padding-left var(--transition-normal);
    display: inline-block;
}

.footer-links a:hover,
.footer-legal a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

.newsletter-form {
    display: flex;
    margin-top: 1.5rem;
}

.newsletter-form input {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 4px 0 0 4px;
    font-family: var(--font-primary);
    font-size: 0.9rem;
}

.newsletter-form button {
    background-color: var(--color-primary);
    color: white;
    border: none;
    padding: 0 1.25rem;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color var(--transition-normal);
}

.newsletter-form button:hover {
    background-color: #27ae60;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.9rem;
}

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

.footer-extra-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-normal);
}

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

/* Responsive Styles */
@media (max-width: 1024px) {
    .about-content,
    .sustainability-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .sustainability-image {
        order: -1;
    }
    
    .vm-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--color-darker);
        padding: 5rem 2rem 2rem;
        transition: right 0.3s ease-in-out;
        z-index: 1000;
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav ul {
        flex-direction: column;
    }
    
    .nav li {
        margin: 0 0 1.5rem 0;
    }
    
    .nav a {
        font-size: 1.1rem;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .about-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 576px) {
    .section {
        padding: 3rem 0;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content,
    .footer-bottom {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-extra-links {
        justify-content: center;
    }
    
    .footer-about,
    .footer-links,
    .footer-legal,
    .footer-newsletter {
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }
.delay-4 { animation-delay: 0.8s; }

/* Utility Classes */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }