/* Global Styles & Reset */
:root {
    /* Define a sophisticated color palette */
    --color-primary: #005641; /* Deep, corporate green */
    --color-secondary: #007a5e; /* Slightly lighter green accent */
    --color-text-dark: #333; /* Dark gray for main text */
    --color-text-light: #f8f8f8; /* Off-white for dark backgrounds */
    --color-background-light: #fff; /* White */
    --color-background-gray: #f4f7f6; /* Very light gray for section separation */
    --color-border: #ddd; /* Light gray border */
    --color-button-hover: #003d2c; /* Darker green for button hover */

    /* Typography */
    --font-heading: 'Montserrat', sans-serif; /* Modern sans-serif for headings */
    --font-body: 'Open Sans', sans-serif; /* Clean, readable sans-serif for body */

    /* Spacing */
    --space-xs: 0.5rem; /* Extra small space */
    --space-sm: 1rem;   /* Small space */
    --space-md: 2rem;   /* Medium space */
    --space-lg: 4rem;   /* Large space */
    --space-xl: 6rem;   /* Extra large space */

    /* Other */
    --border-radius: 5px;
    --transition-speed: 0.3s ease;
}

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

body {
    font-family: var(--font-body);
    line-height: 1.7; /* Slightly increased line height for readability */
    color: var(--color-text-dark);
    background-color: var(--color-background-light);
    scroll-behavior: smooth;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-primary); /* Headings in primary color */
    line-height: 1.3;
    margin-bottom: 0.5em;
    font-weight: 700; /* Headings are bold by default */
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.8rem; }
h4 { font-size: 1.5rem; }

p {
    margin-bottom: 1.5rem; /* More space after paragraphs */
    font-size: 1rem; /* Ensure base paragraph size */
}

a {
    text-decoration: none;
    color: var(--color-secondary); /* Links in secondary color */
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--color-primary); /* Darker on hover */
}

/* Buttons */
.btn {
    display: inline-block;
    background-color: var(--color-secondary);
    color: var(--color-text-light);
    padding: 0.75rem 1.5rem; /* Larger button padding */
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    border: none; /* Ensure no default border */
    cursor: pointer;
    font-size: 1.1rem;
}

.btn:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px); /* Subtle lift effect */
}

/* Layout Containers */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md); /* Padding on sides */
}

section {
    padding: var(--space-xl) 0; /* Generous padding for sections */
    text-align: center;
    overflow: hidden; /* Prevent potential overflow from animations/hover effects */
}

.section-heading {
    margin-bottom: var(--space-lg); /* Increased space below heading */
    position: relative;
    display: inline-block; /* Allows centering with text-align */
}

.section-heading::after {
    content: '';
    display: block;
    width: 80px; /* Wider underline */
    height: 4px; /* Thicker underline */
    background-color: var(--color-secondary);
    margin: var(--space-sm) auto 0;
    border-radius: 2px;
}

/* --- Header and Navigation --- */

header {
    background-color: var(--color-primary);
    padding: var(--space-sm) 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

header .logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    margin-right: var(--space-md);
}

.logo-img {
    height: 50px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-text-light);
}

nav {
    flex-grow: 1;
    display: flex; /* Nav itself is a flex container */
    /* Explicitly set flex-direction to row for desktop/base */
    flex-direction: row; /* Ensure horizontal layout by default */
    justify-content: flex-end; /* Push nav content to the right */
    align-items: center; /* Vertically align ul and button */
    flex-wrap: wrap; /* Allow wrapping if needed */
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex; /* ul is a flex container for li items */
    /* Explicitly set flex-direction to row for desktop/base */
    flex-direction: row; /* Ensure horizontal layout by default */
    justify-content: flex-end; /* Align list items to the right within the ul */
    align-items: center;
    flex-wrap: wrap;
    /* Use gap for consistent spacing between li items on desktop */
    gap: var(--space-md); /* Use medium space (2rem) between nav links on desktop */
}

nav li {
    margin-left: 0; /* Remove margin-left when using gap on ul */
    margin-top: 5px; /* Allow slight vertical space if items wrap */
    margin-bottom: 5px;
}

nav a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
    transition: color var(--transition-speed), border-bottom-color var(--transition-speed);
    display: inline-block;
}

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

.get-started-btn {
    /* Margin for space between the last nav item and the button on desktop */
    margin-left: var(--space-md); /* Use medium space (2rem) */
    background-color: var(--color-secondary);
    color: var(--color-text-light);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    display: inline-block;
    flex-shrink: 0;
}

.get-started-btn:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none; /* Hidden by default on desktop */
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-light);
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle:focus {
    outline: none;
}

/* --- Hero Section --- */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../images/hero-image.jpg') no-repeat center center/cover;
    color: var(--color-text-light);
    padding: var(--space-xl) var(--space-md);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 600px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInAndSlideUp 1s ease-out forwards;
    animation-delay: 0.5s;
}

@keyframes fadeInAndSlideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-light);
    font-weight: 700;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: var(--space-md);
    color: rgba(255, 255, 255, 0.9);
}

.quote-form {
    background: rgba(255, 255, 255, 0.95);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    max-width: 800px;
    margin: var(--space-md) auto 0;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.quote-form input,
.quote-form select {
    flex-grow: 1;
    min-width: 200px;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    color: var(--color-text-dark);
    outline: none;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.quote-form input:focus,
.quote-form select:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 5px rgba(0, 122, 94, 0.3);
}

.quote-form button {
    flex-grow: 1;
    min-width: 200px;
    background-color: var(--color-secondary);
    color: var(--color-text-light);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.quote-form button:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
}

/* --- Stats Section --- */
.stats {
    background-color: var(--color-background-gray);
    padding: var(--space-lg) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.stats-container {
    display: flex;
    justify-content: space-around;
    max-width: 900px;
    margin: 0 auto;
    gap: var(--space-md);
}

.stat {
    font-size: 1.1rem;
    color: var(--color-text-dark);
    font-weight: 600;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat span {
    font-size: 2.5rem;
    color: var(--color-primary);
    display: block;
    margin-bottom: 5px;
    font-weight: 700;
}

/* --- Services Section --- */
.services {
    padding: var(--space-xl) 0;
    text-align: center;
    background-color: var(--color-background-light);
}

.services .section-heading {
    margin-bottom: var(--space-xl);
}

.services-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
    max-width: 1200px;
    margin: 0 auto;
}

.service-box {
    background: var(--color-background-light);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    text-align: left;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-box:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-box img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    margin-bottom: var(--space-sm);
    transition: transform 0.5s ease;
}

.service-box:hover img {
    transform: scale(1.05);
}

.service-box h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
    color: var(--color-primary);
}

.service-box p {
    margin-bottom: var(--space-md);
    flex-grow: 1;
}

.service-box a {
    display: inline-block;
    color: var(--color-secondary);
    font-weight: 600;
    transition: color var(--transition-speed);
}

.service-box a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* --- Sustainability Section --- */
.sustainability {
    background: linear-gradient(rgba(0, 86, 65, 0.8), rgba(0, 86, 65, 0.8)), url('../images/sustainability-image.jpg') no-repeat center center/cover;
    padding: var(--space-xl) var(--space-md);
    text-align: center;
    color: var(--color-text-light);
}

.sustainability-content {
    max-width: 800px;
    margin: 0 auto;
}

.sustainability h2 {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-light);
}

.sustainability p {
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
    color: rgba(255, 255, 255, 0.9);
}

.sustainability a {
    background-color: var(--color-secondary);
    color: var(--color-text-light);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    display: inline-block;
}

.sustainability a:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
}

/* --- Contact Section --- */
.contact {
    padding: var(--space-xl) 0;
    text-align: center;
    background-color: var(--color-background-gray);
}

.contact .section-heading {
     margin-bottom: var(--space-lg);
}

.contact form {
    max-width: 700px;
    margin: 0 auto;
    background: var(--color-background-light);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    text-align: left;
}

.contact input,
.contact select,
.contact textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    color: var(--color-text-dark);
    outline: none;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.contact input:focus,
.contact select:focus,
.contact textarea:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 5px rgba(0, 122, 94, 0.3);
}

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

.contact button {
    display: block;
    width: 100%;
    background-color: var(--color-primary);
    color: var(--color-text-light);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    margin-top: var(--space-sm);
}

.contact button:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
}

/* --- Footer --- */
footer {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    text-align: center;
    padding: var(--space-md) 0;
    font-size: 0.9rem;
}

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

footer a:hover {
    color: var(--color-text-light);
    text-decoration: underline;
}

/* --- Responsive Design --- */

/* Tablet and Smaller Desktops */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.6rem; }

    .container {
         padding: 0 var(--space-sm);
    }

    section {
        padding: var(--space-lg) 0;
    }

    .section-heading {
        margin-bottom: var(--space-md);
    }

    .hero {
        min-height: 500px;
        padding: var(--space-lg) var(--space-sm);
    }

    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1.1rem; }

    .quote-form {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-sm);
    }

    .quote-form input,
    .quote-form select,
    .quote-form button {
        min-width: unset;
        width: 100%;
    }

    .stats-container {
        flex-direction: column;
        gap: var(--space-md);
    }

    .stat span {
        font-size: 2rem;
    }

    .services-container {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .service-box {
        width: 100%;
        max-width: 400px;
        margin: 0 auto var(--space-md) auto;
    }

    .sustainability h2 { font-size: 2rem; }
    .sustainability p { font-size: 1.1rem; }

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

    .contact form {
        padding: var(--space-sm);
    }

    /* Nav Spacing on Tablet/Smaller Desktop */
    nav ul {
        gap: var(--space-md);
    }
     .get-started-btn {
        margin-left: var(--space-md);
    }
}

/* Mobile Devices (Portrait and Landscape) */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.4rem; }
    p { font-size: 0.95rem; }

    .container {
         padding: 0 var(--space-sm);
    }

    section {
        padding: var(--space-md) 0;
    }

    .section-heading {
        font-size: 1.8rem;
        margin-bottom: var(--space-md);
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        padding: var(--space-sm);
    }

    /* Show the hamburger menu button on mobile */
    .menu-toggle {
        display: block;
        position: absolute;
        top: var(--space-sm);
        right: var(--space-sm);
    }

    /* Hide the nav by default on mobile */
    nav {
        display: none; /* Initially hidden */
        width: 100%;
        background-color: var(--color-primary); /* Match header background */
        padding: var(--space-sm) 0;
    }

    /* Show the nav when the 'active' class is added */
    nav.active {
        display: flex; /* Show the nav when toggled */
    }

    /* Ensure the nav ul and get-started-btn are styled properly when visible */
    nav ul {
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        width: 100%;
        gap: 0;
        margin-bottom: var(--space-sm);
    }

    nav li {
        margin: 5px 0;
        width: 100%;
        margin-left: var(--space-md);
    }

    nav a {
        padding: 10px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        display: block;
    }

    nav a:last-child {
        border-bottom: none;
    }

    .get-started-btn {
        margin-left: 0;
        margin-top: var(--space-sm);
        width: 100%;
        text-align: center;
    }

    /* Adjust header-container to accommodate the hamburger icon */
    .header-container {
        position: relative;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 0 var(--space-md);
    }

    .logo {
        margin-bottom: 0;
    }

    .logo-img {
        height: 40px;
    }

    .logo-text {
        font-size: 1.3rem;
        margin-right: 0;
        margin-bottom: var(--space-sm);
    }

    .hero {
        min-height: 350px;
        padding: var(--space-md) var(--space-sm);
    }

    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }

    .quote-form {
        padding: var(--space-xs);
        gap: var(--space-xs);
    }

    .quote-form input,
    .quote-form select,
    .quote-form button {
         padding: 0.6rem;
         font-size: 0.95rem;
    }

    .stats {
        padding: var(--space-md) 0;
    }

    .stat {
        font-size: 1rem;
    }

    .stat span {
        font-size: 1.8rem;
    }

    .service-box {
        padding: var(--space-sm);
    }

    .service-box img {
        height: 180px;
    }

    .service-box h3 { font-size: 1.3rem; }
    .service-box p { font-size: 0.95rem; }

    .sustainability {
         padding: var(--space-md) var(--space-sm);
    }

    .sustainability h2 { font-size: 1.8rem; }
    .sustainability p { font-size: 1rem; }

    .sustainability a {
        padding: 0.6rem 1.2rem;
        font-size: 1rem;
    }

    .contact {
        padding: var(--space-md) 0;
    }

    .contact form {
        padding: var(--space-sm);
    }

    .contact input,
    .contact select,
    .contact textarea,
    .contact button {
        padding: 0.6rem;
        font-size: 1rem;
    }

    .contact textarea {
        min-height: 100px;
    }

    footer {
         padding: var(--space-sm) 0;
         font-size: 0.85rem;
    }
}

/* Extra Small Devices */
@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.2rem; }

    .container {
         padding: 0 var(--space-xs);
    }

    section {
        padding: var(--space-md) 0;
    }

     .section-heading {
        font-size: 1.5rem;
        margin-bottom: var(--space-md);
    }

    .logo-img {
        height: 35px;
    }

     .logo-text {
        font-size: 1.1rem;
    }

    nav a {
         font-size: 0.9rem;
    }

    .hero {
        min-height: 300px;
        padding: var(--space-md) var(--space-xs);
    }

    .hero h1 { font-size: 1.8rem; }
    .hero p { font-size: 0.9rem; }

    .quote-form {
        padding: var(--space-xs);
        gap: var(--space-xs);
    }

    .quote-form input,
    .quote-form select,
    .quote-form button {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

    .stats {
        padding: var(--space-sm) 0;
    }

    .stat {
        font-size: 0.9rem;
    }

    .stat span {
        font-size: 1.5rem;
    }

    .service-box {
        padding: var(--space-sm);
    }

    .service-box img {
        height: 150px;
    }

    .service-box h3 { font-size: 1.1rem; }
    .service-box p { font-size: 0.9rem; }

    .sustainability {
         padding: var(--space-md) var(--space-xs);
    }

    .sustainability h2 { font-size: 1.5rem; }
    .sustainability p { font-size: 0.9rem; }

    .sustainability a {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .contact {
        padding: var(--space-md) 0;
    }

    .contact form {
        padding: var(--space-xs);
    }

    .contact input,
    .contact select,
    .contact textarea,
    .contact button {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

    .contact textarea {
        min-height: 80px;
    }

    footer {
         padding: var(--space-sm) 0;
         font-size: 0.8rem;
    }
}

/* Add Google Fonts import */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&family=Open+Sans:wght@400;600&display=swap');