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

:root {
    --primary-color: #5B9BD5;
    --secondary-color: #2C5F8D;
    --dark-color: #1E3A5F;
    --light-color: #F5F8FA;
    --text-color: #333333;
    --white: #ffffff;
    --accent-color: #7BB2E8;
    --gray: #666666;
    --light-gray: #E0E7EE;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
}

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

.header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.4s ease;
    background-color: transparent;
}

.header.scrolled {
    background-color: var(--white);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 1.5rem 0;
    transition: padding 0.4s ease;
}

.header.scrolled .navbar {
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    transition: color 0.4s ease;
}

.header.scrolled .logo {
    color: var(--secondary-color);
}

.logo i {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
}

.nav-menu li {
    position: relative;
    padding: 0 1.5rem;
}

.nav-menu li:not(:last-child):not(:nth-child(4))::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.3);
}

.header.scrolled .nav-menu li:not(:last-child):not(:nth-child(4))::after {
    background-color: rgba(0, 0, 0, 0.15);
}

.nav-link {
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    position: relative;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.header.scrolled .nav-link {
    color: var(--text-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

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

.btn-contact {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
}

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

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background-color: var(--white);
    margin: 4px 0;
    transition: 0.3s;
    box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
}

.header.scrolled .mobile-menu-toggle span {
    background-color: var(--dark-color);
    box-shadow: none;
}

.nav-menu.active ~ .container {
    background-color: var(--white);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--white);
}

.hero-parallax {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 120%;
    background: url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?w=1920&h=1080&fit=crop') center/cover no-repeat;
    background-attachment: fixed;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 78, 137, 0.85) 0%, rgba(26, 26, 46, 0.85) 100%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    padding: 2rem;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    font-weight: 300;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(91, 155, 213, 0.4);
}

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

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

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--white);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.section-tag {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-weight: 700;
    line-height: 1.1;
}

.section-description {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto 3rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.about {
    padding: 100px 20px;
    background-color: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 5rem;
}

.about-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.about-content {
    text-align: left;
}

.about-content .section-title {
    text-align: left;
}

.about-content p {
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.about-feature i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.about-feature span {
    font-weight: 500;
}

.mission-section {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--dark-color) 100%);
    color: var(--white);
    padding: 60px 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

.mission-section h2 {
    color: var(--white);
    font-size: 2.5rem;
    line-height: 1.1;
}

.mission-section h3 {
    color: var(--accent-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.mission-section p {
    font-size: 1.1rem;
    line-height: 1.9;
    max-width: 900px;
    margin: 0 auto;
    opacity: 0.95;
}

.stats {
    position: relative;
    padding: 80px 20px;
    color: var(--white);
    overflow: hidden;
    background: url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?w=1920&h=800&fit=crop') center/cover no-repeat;
}

.stats-parallax {
    display: none;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 58, 95, 0.9);
    z-index: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    text-align: center;
    position: relative;
    z-index: 1;
}

.stat-item {
    padding: 1rem;
}

.stat-icon {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 0.5rem;
}

.stat-number .plus {
    color: var(--white);
}

.stat-label {
    font-size: 1rem;
    color: var(--white);
    font-weight: 400;
}

.services {
    padding: 100px 20px;
    background-color: var(--light-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.service-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    transition: all 0.4s ease;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
    transition: transform 0.4s ease;
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(10deg);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    line-height: 1.2;
}

.service-card p {
    line-height: 1.8;
    color: var(--gray);
    margin-bottom: 1.5rem;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: gap 0.3s ease;
}

.service-link:hover {
    gap: 1rem;
}

.why-choose-us {
    padding: 100px 20px;
    background-color: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
}

.feature-card {
    background-color: var(--light-color);
    padding: 50px 40px;
    border-radius: 15px;
    transition: all 0.4s ease;
    position: relative;
}

.feature-card:hover {
    background-color: var(--white);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    transform: translateY(-5px);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    line-height: 1.2;
}

.feature-card p {
    line-height: 1.9;
    color: var(--gray);
}

.projects {
    padding: 100px 20px;
    background-color: var(--light-color);
}

.project-slider {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 15px;
}

.project-slides {
    display: flex;
    transition: transform 0.5s ease;
}

.project-slide {
    min-width: 100%;
    display: none;
    position: relative;
}

.project-slide.active {
    display: block;
}

.project-slide img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    display: block;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    display: flex;
    align-items: flex-end;
    padding: 3rem;
    color: var(--white);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.project-slide:hover .project-overlay {
    opacity: 1;
}

.project-category {
    display: inline-block;
    background-color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-content h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.project-content p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--secondary-color);
    border: none;
    font-size: 1.5rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.slider-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-50%) scale(1.1);
}

.slider-btn.prev {
    left: 20px;
}

.slider-btn.next {
    right: 20px;
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 2rem;
}

.dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: #ddd;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot:hover {
    background-color: var(--accent-color);
}

.dot.active {
    background-color: var(--primary-color);
    width: 40px;
    border-radius: 7px;
}

.footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 80px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.footer-logo h3 {
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.2;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1.5rem;
    color: var(--white);
    font-weight: 600;
}

.footer-section p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    opacity: 0.9;
}

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.footer-social a {
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section ul li a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.9;
    transition: all 0.3s ease;
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-top: 0.2rem;
}

.contact-item span {
    opacity: 0.9;
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .header.menu-open {
        background-color: var(--white);
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    }

    .header.menu-open .logo {
        color: var(--secondary-color);
    }

    .header.menu-open .mobile-menu-toggle span {
        background-color: var(--dark-color);
        box-shadow: none;
    }

    .header.menu-open .nav-link {
        color: var(--text-color) !important;
    }

    .header.menu-open .btn-contact {
        color: var(--white) !important;
        background-color: var(--primary-color);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.2);
        padding: 2rem 0;
    }

    .nav-menu li {
        padding: 0.75rem 0;
        width: 100%;
    }

    .nav-menu li:not(:last-child)::after {
        display: none;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu .nav-link {
        color: var(--text-color) !important;
    }

    .nav-menu .btn-contact {
        color: var(--white) !important;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .btn {
        padding: 0.9rem 2rem;
        font-size: 0.95rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-image img {
        height: 350px;
    }

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

    .stat-number {
        font-size: 3rem;
    }

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

    .project-slide img {
        height: 400px;
    }

    .slider-btn {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }

    .slider-btn.prev {
        left: 10px;
    }

    .slider-btn.next {
        right: 10px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 20px 60px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

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

    .stat-number {
        font-size: 2.5rem;
    }

    .project-slide img {
        height: 300px;
    }

    .project-overlay {
        padding: 2rem;
    }

    .project-content h3 {
        font-size: 1.5rem;
    }
}