/* --- CSS Variables & Basic Reset --- */
:root {
    --primary-green: #3D8B58;
    --accent-gold: #F2C94C;
    --dark-text: #212529;
    --medium-grey: #6C757D;
    --light-grey-bg: #F8F9FA;
    --white: #FFFFFF;
    --border-color: #DEE2E6;

    --font-heading: Arial, Helvetica, sans-serif;
    --font-body: Verdana, Geneva, Tahoma, sans-serif;

    --spacing-unit: 8px;
    --container-width: 1140px;
    --header-height: 70px;
    --border-radius: 4px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px; /* Base font size */
}

body {
    font-family: var(--font-body);
    color: var(--dark-text);
    line-height: 1.6;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Utility Classes --- */
.container {
    width: 90%;
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: calc(var(--spacing-unit) * 2);
    padding-right: calc(var(--spacing-unit) * 2);
}

.section-padding {
    padding-top: calc(var(--spacing-unit) * 8);
    padding-bottom: calc(var(--spacing-unit) * 8);
}

.bg-light {
    background-color: var(--light-grey-bg);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem; /* 40px */
    color: var(--dark-text);
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 5); /* 40px */
    font-weight: 600;
}

.btn {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3); /* 12px 24px */
    font-family: var(--font-heading);
    font-size: 1rem; /* 16px */
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: #32734B; /* Darker green */
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--accent-gold);
    color: var(--dark-text);
}

.btn-secondary:hover {
    background-color: #E0B840; /* Darker gold */
    transform: translateY(-2px);
}

.learn-more-link {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    margin-top: var(--spacing-unit);
}

.learn-more-link:hover {
    text-decoration: underline;
    color: #32734B;
}

/* --- Header & Navigation --- */
.site-header {
    background-color: var(--white);
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem; /* 24px */
    font-weight: 700;
    color: var(--primary-green);
    text-decoration: none;
}

.nav-menu {
    list-style: none;
    display: flex;
}

.nav-menu li {
    margin-left: calc(var(--spacing-unit) * 3); /* 24px */
}

.nav-link {
    text-decoration: none;
    color: var(--dark-text);
    font-weight: 500;
    padding: calc(var(--spacing-unit) * 0.5) 0;
    position: relative;
    transition: color 0.3s ease;
}

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

.nav-link.active::after, .nav-link:hover::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-green);
}

.nav-toggle {
    display: none; /* Hidden by default, shown on mobile */
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-unit);
}

.hamburger-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--dark-text);
    position: relative;
    transition: background-color 0.3s ease;
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background-color: var(--dark-text);
    transition: transform 0.3s ease, top 0.3s ease, bottom 0.3s ease;
}

.hamburger-icon::before {
    top: -7px;
}

.hamburger-icon::after {
    bottom: -7px;
}

/* Mobile Nav Open State */
.nav-open .hamburger-icon {
    background-color: transparent; /* Middle bar disappears */
}
.nav-open .hamburger-icon::before {
    transform: rotate(45deg);
    top: 0;
}
.nav-open .hamburger-icon::after {
    transform: rotate(-45deg);
    bottom: 0;
}


/* --- Hero Section --- */
.hero-section {
    background-color: var(--primary-green); /* Primary color background */
    color: var(--white);
    min-height: 100vh; /* Full viewport height */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--header-height); /* Offset for fixed header */
    position: relative; /* For potential pseudo-elements or overlays */
}
/* Optional: Subtle pattern or gradient for hero */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    /* background-image: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.3)); */
    opacity: 0.1; /* example */
}


.hero-content {
    max-width: 800px;
    z-index: 1; /* Ensure content is above pseudo-elements */
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem; /* 56px */
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-unit);
}

.hero-subtitle {
    font-size: 1.25rem; /* 20px */
    margin-bottom: calc(var(--spacing-unit) * 3); /* 24px */
    opacity: 0.9;
}

.hero-section .btn-primary {
    background-color: var(--accent-gold);
    color: var(--dark-text);
    padding: calc(var(--spacing-unit) * 1.8) calc(var(--spacing-unit) * 3.5); /* 14.4px 28px */
    font-size: 1.1rem;
}
.hero-section .btn-primary:hover {
    background-color: #E0B840;
}


/* --- About Us Section --- */
.about-content {
    display: flex;
    gap: calc(var(--spacing-unit) * 4); /* 32px */
    align-items: flex-start;
}
.about-text {
    flex: 2;
}
.about-text h3 {
    font-family: var(--font-heading);
    color: var(--primary-green);
    margin-top: calc(var(--spacing-unit) * 2);
    margin-bottom: var(--spacing-unit);
}
.about-text ul {
    list-style-position: inside;
    padding-left: var(--spacing-unit);
}
.about-text ul li {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}
.about-image-placeholder {
    flex: 1;
    background-color: var(--light-grey-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--medium-grey);
    font-style: italic;
}


/* --- Services Section --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 3); /* 24px */
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.service-card {
    background-color: var(--white);
    padding: calc(var(--spacing-unit) * 3); /* 24px */
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}

.service-icon {
    font-size: 2.5rem; /* 40px */
    color: var(--primary-green);
    margin-bottom: var(--spacing-unit);
}

.service-title {
    font-family: var(--font-heading);
    font-size: 1.5rem; /* 24px */
    color: var(--dark-text);
    margin-bottom: var(--spacing-unit);
}

.service-description {
    font-size: 0.95rem; /* ~15px */
    color: var(--medium-grey);
    flex-grow: 1; /* Pushes link to bottom if card heights vary */
    margin-bottom: var(--spacing-unit);
}
.section-cta {
    text-align: center;
    margin-top: calc(var(--spacing-unit) * 4);
}

/* --- Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.project-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    overflow: hidden; /* For image placeholder */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}

.project-image-placeholder {
    height: 220px;
    background-color: var(--medium-grey);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    font-style: italic;
}
.project-image-placeholder span {
    padding: var(--spacing-unit);
    background: rgba(0,0,0,0.3);
    border-radius: var(--border-radius);
}

.project-info {
    padding: calc(var(--spacing-unit) * 2.5); /* 20px */
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.3rem; /* ~21px */
    color: var(--primary-green);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}
.project-client {
    font-size: 0.9rem;
    color: var(--medium-grey);
    font-style: italic;
    margin-bottom: var(--spacing-unit);
}

.project-description {
    font-size: 0.95rem;
    color: var(--dark-text);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

/* --- Testimonials Section --- */
.testimonials-slider {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    overflow: hidden; /* Hides non-current items if using absolute positioning */
    text-align: center;
}

.testimonial-item {
    display: none; /* Hidden by default, shown by JS */
    padding: 0 var(--spacing-unit); /* Space for nav buttons if they are inside */
}
.testimonial-item.current-testimonial {
    display: block;
}

.testimonial-quote {
    font-size: 1.15rem; /* ~18px */
    font-style: italic;
    color: var(--dark-text);
    margin-bottom: var(--spacing-unit);
    line-height: 1.5;
}

.testimonial-author {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-green);
}

.testimonial-navigation {
    margin-top: calc(var(--spacing-unit) * 2);
    display: flex;
    justify-content: center;
    gap: var(--spacing-unit);
}
.testimonial-navigation button {
    background-color: var(--primary-green);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.testimonial-navigation button:hover {
    background-color: #32734B;
}

/* --- Contact Section --- */
.contact-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto calc(var(--spacing-unit) * 4) auto;
    color: var(--medium-grey);
}
.contact-content {
    display: flex;
    gap: calc(var(--spacing-unit) * 5);
    align-items: flex-start;
}

.contact-form {
    flex: 2;
    background-color: var(--white);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    color: var(--dark-text);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.25); /* 10px */
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: var(--font-body);
}
.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 2px rgba(61, 139, 88, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}
.contact-form .btn-primary {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5);
}
.form-status {
    margin-top: var(--spacing-unit);
    font-size: 0.9rem;
    text-align: center;
}
.form-status.success { color: var(--primary-green); }
.form-status.error { color: #E74C3C; }


.contact-info {
    flex: 1;
    padding-top: var(--spacing-unit); /* Align with form appearance */
}
.contact-info h3 {
    font-family: var(--font-heading);
    color: var(--primary-green);
    margin-bottom: var(--spacing-unit);
}
.contact-info p {
    margin-bottom: var(--spacing-unit);
}
.contact-info a {
    color: var(--primary-green);
    text-decoration: none;
}
.contact-info a:hover {
    text-decoration: underline;
}

/* --- Footer --- */
.site-footer-main {
    background-color: var(--dark-text);
    color: var(--light-grey-bg);
    padding: calc(var(--spacing-unit) * 3) 0; /* 24px */
    text-align: center;
    font-size: 0.9rem;
}
.site-footer-main p {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

/* --- Animations --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate-on-scroll.fade-in {
    opacity: 0;
    transform: translateY(0); /* Only fade */
}
.animate-on-scroll.fade-in-up {
    /* Default state is translateY(20px) */
}
.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }


/* --- Responsive Design --- */
@media (max-width: 992px) { /* Medium devices (tablets, less than 992px) */
    .hero-title {
        font-size: 2.8rem; /* Adjusted for smaller screens */
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .about-content {
        flex-direction: column;
    }
    .about-image-placeholder {
        margin-top: calc(var(--spacing-unit) * 3);
        min-height: 200px;
    }
    .contact-content {
        flex-direction: column;
    }
    .contact-info {
        margin-top: calc(var(--spacing-unit) * 3);
        text-align: center;
    }
}

@media (max-width: 768px) { /* Small devices (landscape phones, 768px and down) */
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        padding: var(--spacing-unit) 0;
        border-top: 1px solid var(--border-color);
    }
    .nav-menu.nav-menu-open { /* Class added by JS */
        display: flex;
    }
    .nav-menu li {
        margin-left: 0;
        width: 100%;
        text-align: center;
    }
    .nav-link {
        display: block;
        padding: calc(var(--spacing-unit) * 1.5) var(--spacing-unit); /* 12px 8px */
    }
    .nav-link:hover::after, .nav-link.active::after {
        display: none; /* No underline on mobile nav items */
    }
    .nav-link:hover, .nav-link.active {
        background-color: var(--light-grey-bg);
    }
    .nav-toggle {
        display: block; /* Show hamburger icon */
    }

    .hero-title {
        font-size: 2.2rem; /* ~35px */
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .services-grid, .projects-grid {
        grid-template-columns: 1fr; /* Stack cards on smaller screens */
    }
}

@media (max-width: 576px) { /* Extra small devices (portrait phones, less than 576px) */
    html {
        font-size: 15px; /* Slightly smaller base font for very small screens */
    }
    .hero-title {
        font-size: 2rem; /* ~32px */
    }
    .section-title {
        font-size: 1.8rem;
    }
    .btn {
        padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 2.5); /* 10px 20px */
        font-size: 0.95rem;
    }
}

.service-icon > img {
    color: var(--primary-green);
}