:root {
    --primary-green: #2c8d3a;
    --light-green: #7ed386;
    --dark-green: #1b5e20;
    --accent-yellow: #ffd54f;
    --accent-blue: #4fc3f7;
    --text-light: #ffffff;
    --text-dark: #333333;
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;

    padding: 0;
    overflow-x: hidden;
    background-color: #f5f5f5;
}

.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    transition: all 0.3s ease;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

.navbar.scrolled {
    padding: 8px 0;
    background-color: rgba(255, 255, 255, 0.98);
}

.navbar-brand {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--primary-green);
    font-size: 1.6rem;
}

.navbar-brand span {
    color: var(--accent-yellow);
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    margin: 0 10px;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-green);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(44, 141, 58, 0.9) 0%, rgba(27, 94, 32, 0.9) 100%);
    color: var(--text-light);
}

.hero-content {
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
}

.btn-custom {
    background-color: var(--accent-yellow);
    color: var(--text-dark);
    border: none;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-custom:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background-color: #ffca28;
}

.section {
    min-height: 100vh;
    padding: 100px 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.section h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
}

.section h2:after {
    content: '';
    position: absolute;
    width: 80px;
    height: 4px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-yellow);
    border-radius: 2px;
}

.section p {
    font-size: 1.2rem;
    line-height: 1.8;
    max-width: 800px;
    margin-bottom: 30px;
}

.section-light {
    background-color: #ffffff;
    color: var(--text-dark);
}

.section-dark {
    background-color: var(--primary-green);
    color: var(--text-light);
}

/* Cards */
.card-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    width: 100%;
    max-width: 1200px;
    margin-top: 30px;
}

.solution-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    width: 320px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    transform: translateY(0);
}

.solution-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.card-image {
    height: 200px;
    overflow: hidden;
}

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

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

.card-content {
    padding: 25px;
    text-align: left;
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-green);
}

.card-content p {
    font-size: 1rem;
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary-green);
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.read-more i {
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.read-more:hover {
    color: var(--dark-green);
}

.read-more:hover i {
    transform: translateX(5px);
}

.stat-label {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
}

footer {
    background-color: #1a1a1a;
    color: #ffffff;
    padding: 60px 0 30px;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.footer-links a {
    color: #ffffff;
    margin: 0 15px;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-yellow);
}

.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--accent-yellow);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-dark);
    font-size: 1.5rem;
    z-index: 99;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.scroll-top.active {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: #ffca28;
    transform: translateY(-3px);
}

/* Canvas for Three.js */
#background-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* Loading Animation */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader-icon {
    width: 100px;
    height: 100px;
    border: 8px solid #f3f3f3;
    border-top: 8px solid var(--primary-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Solution Modal Styles */
.solution-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.7);
}

.solution-modal-content {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 0;
    border: 1px solid #888;
    width: 80%;
    max-width: 800px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 30px rgba(0,0,0,0.3);
    animation: modalopen 0.5s;
}

@keyframes modalopen {
    from {opacity: 0; transform: translateY(-60px);}
    to {opacity: 1; transform: translateY(0);}
}

.solution-modal-header {
    padding: 20px 25px;
    background-color: var(--primary-green);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.solution-modal-header h2 {
    margin: 0;
    padding: 0;
    font-size: 1.8rem;
}

.solution-modal-body {
    padding: 20px 25px;
}

.solution-modal-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    margin-bottom: 20px;
}

.solution-modal-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.solution-modal-description {
    padding: 0 10px;
}

.solution-modal-close {
    color: white;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.solution-modal-close:hover {
    color: var(--accent-yellow);
}

/* Impact Calculator Section */
.impact-calculator {
    background-color: #f8f9fa;
    color: var(--text-dark);
    padding: 100px 20px;
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    padding: 30px;
}

.calculator-header {
    text-align: center;
    margin-bottom: 30px;
}

.calculator-form {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-green);
}

.form-range {
    width: 100%;
    -webkit-appearance: none;
    height: 8px;
    border-radius: 5px;
    background: #e9ecef;
    outline: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-green);
    cursor: pointer;
}

.form-value {
    display: inline-block;
    width: 50px;
    text-align: center;
    font-weight: 600;
}

.form-unit {
    display: inline-block;
    color: #6c757d;
    margin-left: 5px;
}

.form-description {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 5px;
}

.calculate-btn {
    display: block;
    width: 100%;
    background-color: var(--primary-green);
    color: white;
    border: none;
    padding: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 30px;
    margin-top: 30px;
    transition: all 0.3s ease;
}

.calculate-btn:hover {
    background-color: var(--dark-green);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.results-container {
    display: none;
    margin-top: 30px;
    padding: 20px;
    background-color: rgba(44, 141, 58, 0.1);
    border-radius: 10px;
}

.results-heading {
    font-size: 1.5rem;
    color: var(--primary-green);
    margin-bottom: 15px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #e9ecef;
}

.result-label {
    font-weight: 600;
}

.impact-level {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.impact-low {
    background-color: rgba(40, 167, 69, 0.2);
    color: #28a745;
}

.impact-medium {
    background-color: rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

.impact-high {
    background-color: rgba(220, 53, 69, 0.2);
    color: #dc3545;
}

.total-impact {
    margin-top: 20px;
    padding: 15px;
    background-color: rgba(44, 141, 58, 0.2);
    border-radius: 10px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
}

.tips-container {
    margin-top: 30px;
}

.tips-heading {
    font-size: 1.3rem;
    color: var(--primary-green);
    margin-bottom: 15px;
}

.tips-list {
    list-style-type: none;
    padding: 0;
}

.tips-list li {
    padding: 8px 0;
    position: relative;
    padding-left: 30px;
}

.tips-list li:before {
    content: '\f14a';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: var(--primary-green);
    position: absolute;
    left: 0;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.8rem;
    }

    .section h2 {
        font-size: 2.4rem;
    }

    .section {
        padding: 80px 20px;
    }

    .solution-modal-content {
        width: 95%;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.4rem;
    }

    .section h2 {
        font-size: 2rem;
    }

    .card-container {
        gap: 20px;
    }

    .solution-card {
        width: 100%;
        max-width: 350px;
    }

    .stat-item {
        width: 170px;
    }

    .solution-modal-image {
        height: 200px;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .btn-custom {
        padding: 10px 25px;
    }

    .section h2 {
        font-size: 1.8rem;
    }

    .section p {
        font-size: 1.1rem;
    }

    .card-container {
        gap: 15px;
    }
}