/* Global Styles */
:root {
    --primary-color: #4CAF50;
    --secondary-color: #2E7D32;
    --accent-color: #8BC34A;
    --dark-color: #333;
    --light-color: #f4f4f4;
    --text-color: #333;
    --text-light: #777;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary-color: #81C784;
    --secondary-color: #4CAF50;
    --accent-color: #AED581;
    --dark-color: #f4f4f4;
    --light-color: #333;
    --text-color: #f4f4f4;
    --text-light: #ccc;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    position: relative;
    color: white;
    margin-bottom: 1rem;
}

.hero-section {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out;
}

.hero-section p {
    font-size: 1.5rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.cta-button {
    display: inline-block;
    background: var(--gradient);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
    animation: fadeInUp 1s ease-out 0.4s both;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: white;
}

/* Navigation */
nav {
    background-color: var(--secondary-color);
    margin-bottom: 2rem;
}

nav ul {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
}

nav li {
    margin: 0 0.5rem;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 1rem;
    display: block;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: var(--accent-color);
}

nav a.active {
    background-color: var(--accent-color);
    font-weight: bold;
}

nav i {
    margin-right: 0.5rem;
}

/* Main Content */
main {
    padding: 2rem 0;
}

section {
    margin-bottom: 3rem;
}

h2 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

h3 {
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
}

/* Cards */
.sdg-cards, .strategy-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin: 2rem 0;
}

.sdg-card, .strategy-card {
    flex: 1 1 300px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    transition: transform 0.3s;
}

.sdg-card:hover, .strategy-card:hover {
    transform: translateY(-5px);
}

.sdg-card img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.strategy-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

/* Facts Grid */
.facts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.fact {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.fact i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.fact h3 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin: 0.5rem 0;
}

/* Case Studies */
.case-study {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 2rem;
    transition: var(--transition);
}

.case-study:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Gallery Styles */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.gallery-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.gallery-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.caption {
    padding: 1rem;
    font-weight: 500;
    color: var(--secondary-color);
}

/* Video Gallery */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.video-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1rem;
    transition: var(--transition);
}

.video-item:hover {
    box-shadow: var(--shadow-lg);
}

.video-item iframe {
    width: 100%;
    border-radius: 5px;
}

/* Map Container */
.map-container {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

.map-container iframe {
    width: 100%;
    border: none;
}

.map-note {
    text-align: center;
    color: var(--text-light);
    font-style: italic;
    margin-top: 1rem;
}

/* Calculator Styles */
.calculator {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin: 2rem 0;
    transition: var(--transition);
}

.calculator:hover {
    box-shadow: var(--shadow-lg);
}

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

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

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.form-group input.error {
    border-color: #f44336;
}

button[type="submit"] {
    background: var(--gradient);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.result {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 5px;
    border-left: 4px solid var(--primary-color);
}

/* Formula Cards */
.formula-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin: 1rem 0;
    transition: var(--transition);
}

.formula-card:hover {
    box-shadow: var(--shadow-lg);
}

.formula {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: var(--secondary-color);
}

/* Roadmap Styles */
.roadmap {
    position: relative;
    margin: 2rem 0;
}

.roadmap::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient);
}

.roadmap-step {
    display: flex;
    margin-bottom: 2rem;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 1rem;
    flex-shrink: 0;
    z-index: 1;
}

.step-content {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    flex: 1;
    margin-top: 10px;
}

/* Resource List */
.resource-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.resource {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: var(--transition);
}

.resource:hover {
    box-shadow: var(--shadow-lg);
}

.resource ul {
    margin-top: 1rem;
}

.resource li {
    margin-bottom: 0.5rem;
}

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

.resource a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background: var(--secondary-color);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    transform: translateY(-2px);
    color: var(--accent-color);
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient);
    border: none;
    color: white;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 1000;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

/* Mobile Menu */
.hamburger {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-open {
    display: flex !important;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--secondary-color);
    padding: 1rem;
    box-shadow: var(--shadow-lg);
}

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

.animate-in {
    animation: fadeInUp 0.6s ease-out;
}

/* Loading Animation */
body.loaded {
    opacity: 1;
    transition: opacity 0.3s ease-in;
}

body {
    opacity: 1;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease-out;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--border-radius);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        min-height: 50vh;
        padding: 2rem 0;
    }

    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section p {
        font-size: 1.2rem;
    }

    .cta-button {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    nav ul {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .container {
        width: 95%;
        padding: 0 10px;
    }

    .sdg-cards, .strategy-cards {
        flex-direction: column;
    }

    .facts-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid, .video-grid {
        grid-template-columns: 1fr;
    }

    .roadmap::before {
        left: 20px;
    }

    .roadmap-step {
        flex-direction: column;
        align-items: flex-start;
    }

    .step-number {
        margin-bottom: 1rem;
        margin-right: 0;
    }

    .step-content {
        margin-top: 0;
    }

    .resource-list {
        grid-template-columns: 1fr;
    }

    .calculator {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1rem 0;
    }

    header h1 {
        font-size: 1.5rem;
    }

    header p {
        font-size: 1rem;
    }

    .fact h3 {
        font-size: 1.5rem;
    }

    .social-links {
        flex-wrap: wrap;
    }
}

/* Print Styles */
@media print {
    nav, .dark-mode-toggle, .social-links {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    .sdg-card, .strategy-card, .fact, .case-study, .calculator, .formula-card, .resource {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
        break-inside: avoid;
    }
}