/* --- Google Fonts & CSS Variables --- */
@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Roboto:wght@400;700&display=swap');

:root {
    --primary-green: #4B6B3C;
    --dark-brown: #67421C;
    --medium-brown: #916F4A;
    --light-tan: #C8A87E;
    --accent-green-1: #009444;
    --accent-green-2: #65BC46;
    --white-color: #ffffff;
    --off-white: #f4f4f4;
    --dark-text: #333333;
    
    --header-height: 70px;
    --font-heading: 'Bebas Neue', cursive;
    --font-body: 'Roboto', sans-serif;
}

/* --- General Styles & Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-body);
    color: var(--dark-text);
    line-height: 1.6;
    background-color: var(--white-color);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--primary-green);
    letter-spacing: 1.5px;
    margin-bottom: 1rem;
}

h2 { font-size: 2.8rem; text-align: center; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; color: var(--dark-brown); }
p { margin-bottom: 1rem; }
a { color: var(--accent-green-1); text-decoration: none; }

/* --- Header & Navigation --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    width: 100%;
    padding: 0 2rem;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--primary-green);
    font-weight: bold;
}

.nav-logo img {
    height: 50px; /* Adjust this value as needed */
    width: auto;
    display: block; /* Helps prevent extra space below the image */
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--dark-brown);
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-green-2);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--primary-green);
    transition: all 0.3s ease-in-out;
}

/* --- Hero Section --- */
.hero-section {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white-color);
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('chem_app2.png') no-repeat center center/cover;
}

.hero-content h1 {
    font-size: 5rem;
    color: var(--white-color);
}

.hero-content p {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    letter-spacing: 1px;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 12px 28px;
    background-color: var(--accent-green-2);
    color: var(--white-color);
    border: none;
    border-radius: 5px;
    font-family: var(--font-heading);
    font-size: 1.3rem;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.cta-button:hover {
    background-color: var(--accent-green-1);
    transform: translateY(-2px);
}

/* --- Content Sections --- */
.content-section {
    padding: 5rem 0;
}

.content-section:nth-of-type(odd) {
    background-color: var(--off-white);
}

/* About Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-item {
    background: var(--white-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-left: 5px solid var(--primary-green);
}

/* --- Services Section --- */
.services-section .container {
    text-align: center;
}
.tabs {
    margin-bottom: 2rem;
    border-bottom: 2px solid #ddd;
}
.tab-link {
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--medium-brown);
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}
.tab-link:hover {
    color: var(--dark-brown);
}
.tab-link.active {
    color: var(--primary-green);
    border-bottom-color: var(--accent-green-2);
}
.tab-content {
    display: none;
    text-align: left;
    animation: fadeIn 0.5s;
}

.service-details {
    margin-top: 1.5rem;
}

.service-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
.service-card {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

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

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    margin-top: 2rem;
    text-align: left;
}
.contact-info p {
    margin-bottom: 1.5rem;
}
.response-note {
    font-style: italic;
    color: #666;
    font-size: 0.9rem;
}

.contact-form .form-group {
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
}
.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: var(--font-body);
    font-size: 1rem;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form button {
    width: 100%;
}

/* --- Footer --- */
footer {
    background-color: var(--dark-text);
    color: var(--white-color);
    text-align: center;
    padding: 1.5rem 0;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: var(--header-height);
        flex-direction: column;
        background-color: #fff;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }
    .nav-menu.active {
        left: 0;
    }
    .nav-item {
        padding: 1.5rem 0;
    }
    
    .hero-content h1 { font-size: 3.5rem; }
    .hero-content p { font-size: 1.4rem; }
    h2 { font-size: 2.2rem; }

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

    .contact-form .form-group {
        flex-direction: column;
    }
}