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

:root {
    --primary-color: #FFD700; /* Mining Gold */
    --secondary-color: #333333; /* Charcoal Black */
    --dark-grey: #2C3E50;
    --light-grey: #f4f4f4;
    --white: #ffffff;
    --text-color: #333333;
    --overlay-color: rgba(0, 0, 0, 0.7);
    --transition: all 0.3s ease-in-out;
}

body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

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

.bg-dark {
    background-color: var(--secondary-color);
    color: var(--white);
}

.text-center {
    text-align: center;
}

.text-white {
    color: var(--white);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 5px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #e6c200;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

/* Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    background-color: transparent;
    padding: 20px 0;
}

header.scrolled {
    background-color: var(--secondary-color);
    padding: 10px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 45px; /* Increased size slightly */
    width: auto;
}

.nav-menu ul {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.btn-contact {
    background-color: var(--primary-color);
    color: var(--secondary-color) !important;
    padding: 8px 20px;
    border-radius: 4px;
}

.btn-contact:hover {
    background-color: #e6c200;
}

.btn-contact::after {
    display: none;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: var(--transition);
    background-color: var(--white);
}

/* Hero Section */
.hero {
    height: 100vh;
    background-image: url('../images/hero.jpg');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.7));
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    color: var(--white);
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 300;
}

/* Section Header */
.section-header {
    margin-bottom: 60px;
}

.title-underline {
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 10px 0 20px;
}

.title-underline.center {
    margin: 10px auto 20px;
}

/* About Section */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image img {
    border-radius: 5px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.about-text h2 {
    font-size: 2.5rem;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
    border-bottom: 3px solid transparent;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    border-bottom-color: var(--primary-color);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.icon-box {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: var(--transition);
}

.service-card:hover .icon-box {
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

/* Sector Section - Parallax */
.parallax-section {
    /* Coal Mine Pit / Texture */
    background: url('https://i.pinimg.com/1200x/a9/49/c1/a949c1577ed14f834fbdf336e4e88232.jpg') no-repeat center center/cover;
    background-attachment: fixed;
    padding: 150px 0;
    position: relative;
    color: var(--white);
    text-align: center;
}

.parallax-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
}

.parallax-content {
    position: relative;
    z-index: 1;
}

.parallax-content h2 {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 20px;
}

.parallax-content p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
}

/* Why Choose Us */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    text-align: center;
}

.feature-block {
    padding: 20px;
}

.feature-block i {
    font-size: 3rem;
    color: var(--dark-grey);
    margin-bottom: 20px;
    transition: var(--transition);
}

.feature-block:hover i {
    color: var(--primary-color);
    transform: rotateY(360deg);
}

.feature-block h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 50px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.contact-item h4 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 5px;
}

.contact-item p {
    color: #ccc;
}

.map-container {
    margin-top: 30px;
    border-radius: 5px;
    overflow: hidden;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 5px;
    color: var(--text-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-block {
    width: 100%;
}

/* Footer */
footer {
    background-color: #1a1a1a;
    color: #ccc;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    color: var(--white);
    font-size: 1.5rem;
}

.footer-logo span {
    color: var(--primary-color);
}

.footer-links h4,
.footer-social h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
}

.social-icons a:hover {
    background: var(--primary-color);
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
}

/* Animations */
.fade-in-text,
.fade-in-up,
.fade-in-left,
.fade-in-right,
.slide-in-left,
.slide-in-right {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.slide-in-left {
    transform: translateX(-50px);
}

.slide-in-right {
    transform: translateX(50px);
}

.visible {
    opacity: 1;
    transform: translateY(0) translateX(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

.delay-3 {
    transition-delay: 0.6s;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .about-container {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    /* Mobile Navigation (Tablet & Mobile) */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--secondary-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 20px 0;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 20px;
    }
    
    .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);
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .parallax-content h2 {
        font-size: 2rem;
    }
}