:root {
    --primary-red: #C41E3A;
    --text-dark: #333;
    --text-light: #666;
    --white: #fff;
    --background-light: #f9f9f9;
    --transition-speed: 0.3s;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

body.no-scroll {
    overflow: hidden;
}

/* Hero Section */
.hero {
    height: 55vh;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-slider {
    height: 100%;
    position: relative;
    width: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide:nth-child(1) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), 
                      url('../img/Oil_Gas.webp');
}

.slide:nth-child(2) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
                      url('../img/wel.webp');
}

.slide:nth-child(3) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
                      url('../img/pjm.webp');
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide-content {
    text-align: center;
    color: var(--white);
    max-width: 700px;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    border-radius: var(--border-radius);
    transform: translateY(30px);
    opacity: 0;
    transition: transform 0.8s ease, opacity 0.8s ease;
}

.slide.active .slide-content {
    transform: translateY(0);
    opacity: 1;
}

.slide-content h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 0.8rem;
    line-height: 1.2;
}

.slide-content p {
    font-size: clamp(0.85rem, 1.6vw, 1.1rem);
    margin-bottom: 1.2rem;
}

.hero-cta {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.cta-button {
    display: inline-block;
    padding: 0.7rem 1.8rem;
    background: var(--primary-red);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background-color: #a01830;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.3);
}

/* Slider Dots */
.slider-dots {
    position: absolute;
    bottom: 0.8rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
    z-index: 10;
}

.slider-dot {
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: 0.3s ease;
}

.slider-dot.active {
    background: var(--white);
    transform: scale(1.2);
}

/* Services Overview */
.services-overview {
    position: relative;
    padding: 100px 5%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    background: url('../img/hex.jpg') center center/cover no-repeat;
}

.services-overview::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9));
    z-index: 1;
}

.service-card {
    position: relative;
    z-index: 2;
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.service-icon {
    color: var(--primary-red);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

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

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.service-card p {
    color: var(--text-light);
}

/* Why Choose Us */
.why-choose-us {
    padding: 100px 5%;
    text-align: center;
    background: var(--white);
}

.why-choose-us h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-item {
    padding: 2rem;
    background: var(--background-light);
    border-radius: var(--border-radius);
    transition: transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-red);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.feature-item:hover::before {
    transform: scaleX(1);
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-red);
    opacity: 0.2;
    position: absolute;
    top: 1rem;
    right: 1rem;
    transition: opacity 0.3s ease;
}

.feature-item:hover .feature-number {
    opacity: 0.4;
}

/* Video Section */
.video-section {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 50px 0;
    background: url('../img/hex.jpg') center center/cover no-repeat;
}

.video-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9));
    z-index: 1;
}

.background-video {
    position: relative;
    z-index: 2;
    width: 60%;  
    max-width: 800px; 
    height: auto;
    border: 5px solid #fff; 
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1); 
    border-radius: 10px; 
}

/* Mobile Styles */
@media (max-width: 768px) {
    html, body {
        margin: 0 !important;
        padding: 0 !important;
        width: 100%;
    }

    .hero {
        height: 50vh;
        margin: 0;
        padding: 0;
    }

    .slide-content {
        width: 90%;
    }

    .slide-content h1 {
        font-size: 2.5rem;
    }

    .slide-content p {
        font-size: 1.2rem;
    }

    .services-overview {
        grid-template-columns: 1fr;
    }

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

    .video-section {
        padding: 20px 0;
    }

    .background-video {
        width: 90%;
        max-width: 100%;
        border: none;
        box-shadow: none;
        border-radius: 5px;
    }
}

/* Tablet Styles */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero {
        height: 55vh;
    }

    .slide-content {
        max-width: 600px;
    }

    .slide-content h1 {
        font-size: 2.2rem;
    }

    .slide-content p {
        font-size: 1rem;
    }

    .services-overview {
        grid-template-columns: repeat(1, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .background-video {
        width: 80%;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

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