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

:root {
    --primary-green: #2ecc71;
    --dark-green: #27ae60;
    --light-green: #a9dfbf;
    --dark-bg: #0f1419;
    --text-light: #ecf0f1;
    --text-dark: #2c3e50;
    --card-bg: #1a1f2a;
    --border-color: #2ecc71;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f1419 0%, #1a1f2a 100%);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation Bar */
.navbar {
    background: rgba(15, 20, 25, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--primary-green);
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8em;
    font-weight: bold;
    color: var(--primary-green);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 8px 12px;
    border-radius: 5px;
}

.nav-link:hover {
    color: var(--primary-green);
    background: rgba(46, 204, 113, 0.1);
    border-bottom: 2px solid var(--primary-green);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f1419 0%, #1a1f2a 50%, #2ecc71 100%);
    text-align: center;
    padding: 60px 20px;
}

.hero-content {
    max-width: 800px;
    animation: fadeInUp 0.8s ease;
}

.hero-content h1 {
    font-size: 3.5em;
    margin-bottom: 20px;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    font-weight: 700;
}

.hero-content p {
    font-size: 1.4em;
    margin-bottom: 30px;
    color: #ecf0f1;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.cta-button {
    display: inline-block;
    padding: 15px 50px;
    background: var(--primary-green);
    color: var(--dark-bg);
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1em;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.4);
}

.cta-button:hover {
    background: var(--dark-green);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.6);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Styles */
section {
    padding: 80px 0;
}

section h2 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 60px;
    color: var(--primary-green);
    position: relative;
    padding-bottom: 20px;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--primary-green), transparent);
}

/* Benefits Section */
.benefits {
    background: rgba(26, 31, 42, 0.8);
    border-top: 2px solid var(--primary-green);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-card {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.1), rgba(46, 204, 113, 0.05));
    border: 2px solid var(--primary-green);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(46, 204, 113, 0.3);
    border-color: var(--dark-green);
}

.benefit-card .icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.benefit-card h3 {
    color: var(--primary-green);
    margin-bottom: 15px;
    font-size: 1.4em;
}

.benefit-card p {
    color: #bdc3c7;
    line-height: 1.8;
}

/* Materials Section */
.materials {
    background: linear-gradient(135deg, #0f1419 0%, #1a1f2a 100%);
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
}

.material-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.material-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(46, 204, 113, 0.3);
    border-color: var(--primary-green);
}

.card-header {
    padding: 30px;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    border-bottom: 3px solid rgba(0, 0, 0, 0.2);
}

.material-icon {
    font-size: 3em;
}

.card-header h3 {
    font-size: 1.5em;
    margin: 0;
}

.glass-bg {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.aluminum-bg {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
}

.paper-bg {
    background: linear-gradient(135deg, #f39c12, #e67e22);
}

.plastic-bg {
    background: linear-gradient(135deg, #9b59b6, #8e44ad);
}

.metal-bg {
    background: linear-gradient(135deg, #34495e, #2c3e50);
}

.organic-bg {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
}

.card-content {
    padding: 18px;
}

.brief {
    color: #bdc3c7;
    font-size: 0.9em;
    margin: 0;
    line-height: 1.6;
}

/* Impact Section */
.impact {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.1), rgba(46, 204, 113, 0.05));
    border: 2px solid var(--primary-green);
    border-radius: 15px;
    margin: 40px 20px;
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.impact-item {
    background: rgba(26, 31, 42, 0.7);
    border: 2px solid var(--primary-green);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.impact-item:hover {
    background: rgba(46, 204, 113, 0.05);
    transform: scale(1.05);
}

.impact-number {
    font-size: 2.5em;
    color: var(--primary-green);
    font-weight: bold;
    margin-bottom: 15px;
}

.impact-item p {
    color: #bdc3c7;
    line-height: 1.7;
}

/* Action Section */
.action {
    background: linear-gradient(135deg, #0f1419 0%, #1a1f2a 100%);
    border-top: 2px solid var(--primary-green);
}

.action-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.action-item {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.1), rgba(46, 204, 113, 0.05));
    border: 2px solid var(--primary-green);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.action-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(46, 204, 113, 0.3);
}

.action-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--primary-green);
    color: var(--dark-bg);
    border-radius: 50%;
    font-size: 2em;
    font-weight: bold;
    margin-bottom: 20px;
}

.action-item h3 {
    color: var(--primary-green);
    margin-bottom: 15px;
    font-size: 1.3em;
}

.action-item p {
    color: #bdc3c7;
    line-height: 1.7;
}

/* Footer */
.footer {
    background: rgba(15, 20, 25, 0.95);
    border-top: 2px solid var(--primary-green);
    padding: 40px 0;
    text-align: center;
    color: #95a5a6;
}

.footer p {
    margin: 0;
}

.footer p:first-child {
    color: var(--primary-green);
    font-weight: bold;
    font-size: 1.1em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
        font-size: 0.9em;
    }

    .hero-content h1 {
        font-size: 2em;
    }

    .hero-content p {
        font-size: 1.1em;
    }

    section h2 {
        font-size: 1.8em;
        margin-bottom: 40px;
    }

    section {
        padding: 50px 0;
    }

    .benefits-grid,
    .materials-grid,
    .impact-grid,
    .action-list {
        grid-template-columns: 1fr;
    }

    .material-card {
        margin: 0;
    }

    .logo {
        font-size: 1.3em;
    }

    .impact {
        margin: 20px 10px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-menu {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 1.6em;
    }

    .hero-content p {
        font-size: 1em;
    }

    .cta-button {
        padding: 12px 30px;
        font-size: 1em;
    }

    section {
        padding: 30px 0;
    }

    section h2 {
        font-size: 1.5em;
        margin-bottom: 30px;
    }

    .benefit-card,
    .action-item {
        padding: 20px;
    }

    .material-icon {
        font-size: 2.5em;
    }

    .card-header h3 {
        font-size: 1.2em;
    }

    .impact-number {
        font-size: 2em;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(46, 204, 113, 0.1);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-green);
    border-radius: 5px;
}

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