* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
    font-family: 'Inter', sans-serif;
}

:root {
    --primary-color: #1a56db; 
    --secondary-color: #f5f7fa;  
    --text-dark: #111827;  
    --text-gray: #6b7280;  
    --white: #ffffff;  
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08); 
    --transition: all 0.3s ease; 
}

html {
    scroll-behavior: smooth;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 4px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background: #1548c2;
    transform: translateY(-2px);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-line {
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    margin: 0 auto 20px;
    border-radius: 2px;
}

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

img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 999;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo img {
    width: 180px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

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

.menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 30px 20px;
    transition: var(--transition);
}

.mobile-nav.open {
    right: 0;
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    color: var(--text-dark);
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-nav-list {
    margin-top: 60px;
}

.mobile-nav-item {
    margin-bottom: 25px;
}

.mobile-nav-link {
    color: var(--text-dark);
    font-size: 1.1rem;
    font-weight: 500;
    transition: var(--transition);
}

.mobile-nav-link:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.home {
    margin-top: 80px;
    padding: 60px 0;
    background: var(--secondary-color);
}

.home-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 40px;
}

.home-content h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.home-content p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 30px;
    max-width: 500px;
}

.home-img img {
    border-radius: 8px;
    box-shadow: var(--shadow);
}

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

.about-img img {
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.about-content h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-content p {
    color: var(--text-gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-info {
    margin-top: 30px;
    padding: 15px;
    background: var(--secondary-color);
    border-left: 4px solid var(--primary-color);
}

.about-info p {
    margin-bottom: 0;
    color: var(--text-dark);
    font-weight: 500;
}

.about-info i {
    color: var(--primary-color);
    margin-right: 10px;
}

.services-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.service-card img {
    height: 200px;
}

.service-card h3 {
    padding: 20px 20px 10px;
    font-size: 1.3rem;
    color: var(--primary-color);
}

.service-card p {
    padding: 0 20px 25px;
    color: var(--text-gray);
}

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

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.contact-card p {
    color: var(--text-gray);
    line-height: 1.7;
}

.contact-card a {
    color: var(--primary-color);
    transition: var(--transition);
}

.contact-card a:hover {
    text-decoration: underline;
}

.contact-form {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    font-size: 1rem;
    color: var(--text-dark);
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-btn {
    width: 100%;
    padding: 15px;
    font-size: 1.1rem;
}

.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-content p {
    color: #d1d5db;
}

.footer-links a {
    color: var(--white);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

@media (max-width: 992px) {
    .nav-list {
        display: none;
    }

    .menu-btn {
        display: block;
    }

    .home-container, .about-container, .services-container, .contact-container {
        grid-template-columns: 1fr;
    }

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

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

    .services-container {
        gap: 20px;
    }
}

@media (max-width: 576px) {
    .section {
        padding: 60px 0;
    }

    .home {
        padding: 40px 0;
    }

    .home-content h1 {
        font-size: 2rem;
    }

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

    .service-card img {
        height: 160px;
    }

    .contact-card, .contact-form {
        padding: 20px;
    }

    .logo img {
        width: 150px;
    }
}

.header.scroll {
    padding: 10px 0;
    background: var(--white);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
}