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

:root {
    --primary-blue: #00205B;
    --secondary-blue: #3AAFE3;
    --light-gray: #F5F7FA;
    --medium-gray: #E8ECF1;
    --dark-gray: #4A5568;
    --text-color: #2D3748;
    --white: #FFFFFF;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    background-color: var(--white);
    box-shadow: 0 2px 8px rgba(0, 32, 91, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 16px 0;
}

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

.logo {
    height: 150px;
    width: auto;
}

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

.menu a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: color 0.3s ease;
    position: relative;
}

.menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-blue);
    transition: width 0.3s ease;
}

.menu a:hover {
    color: var(--secondary-blue);
}

.menu a:hover::after {
    width: 100%;
}

.hero {
    background:
        linear-gradient(
            135deg,
            rgba(0, 70, 180, 0.85),
            rgba(0, 40, 120, 0.9)
        ),
        url("img.png");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
    padding: 120px 0;
    text-align: center;
}
.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
    line-height: 1.7;
}

.btn-primary {
    display: inline-block;
    background-color: var(--secondary-blue);
    color: var(--white);
    padding: 16px 48px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid var(--secondary-blue);
}

.btn-primary:hover {
    background-color: transparent;
    border-color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(58, 175, 227, 0.2);
}

.about {
    padding: 100px 0;
    background-color: var(--white);
}

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

.section-header h2 {
    font-size: 42px;
    color: var(--primary-blue);
    margin-bottom: 16px;
    font-weight: 700;
}

.divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-blue), var(--primary-blue));
    margin: 0 auto;
    border-radius: 2px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
}

.about-text {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--dark-gray);
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.feature-card {
    background-color: var(--light-gray);
    padding: 40px 32px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--secondary-blue);
    box-shadow: 0 12px 24px rgba(0, 32, 91, 0.1);
}

.feature-card h3 {
    color: var(--primary-blue);
    font-size: 22px;
    margin-bottom: 16px;
    font-weight: 600;
}

.feature-card p {
    color: var(--dark-gray);
    font-size: 16px;
    line-height: 1.6;
}

.products {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.product-card {
    background-color: var(--white);
    padding: 40px 32px;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--secondary-blue);
    box-shadow: 0 12px 32px rgba(0, 32, 91, 0.12);
}

.product-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--secondary-blue), var(--primary-blue));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.product-icon svg {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.product-card h3 {
    color: var(--primary-blue);
    font-size: 22px;
    margin-bottom: 16px;
    font-weight: 600;
}

.product-card p {
    color: var(--dark-gray);
    font-size: 16px;
    line-height: 1.7;
}

.contact {
    padding: 100px 0;
    background-color: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 60px;
    margin-top: 40px;
}

.contact-info h3,
.contact-form h3 {
    color: var(--primary-blue);
    font-size: 28px;
    margin-bottom: 32px;
    font-weight: 600;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item svg {
    width: 28px;
    height: 28px;
    color: var(--secondary-blue);
    flex-shrink: 0;
    margin-top: 4px;
}

.contact-item h4 {
    color: var(--primary-blue);
    font-size: 18px;
    margin-bottom: 8px;
    font-weight: 600;
}

.contact-item p {
    color: var(--dark-gray);
    font-size: 16px;
    line-height: 1.6;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group input,
.form-group textarea {
    padding: 16px;
    border: 2px solid var(--medium-gray);
    border-radius: 6px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 3px rgba(58, 175, 227, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button {
    align-self: flex-start;
    cursor: pointer;
    border: none;
}

.footer {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 60px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    height: 150px;
    width: auto;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.footer-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    margin-bottom: 12px;
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--secondary-blue);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 32px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
}

@media (max-width: 768px) {
    .menu {
        gap: 20px;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-header h2 {
        font-size: 32px;
    }

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

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

@media (max-width: 480px) {
    .logo {
        height: 40px;
    }

    .menu {
        flex-direction: column;
        gap: 12px;
        font-size: 14px;
    }

    .hero {
        padding: 80px 0;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .btn-primary {
        padding: 14px 32px;
        font-size: 15px;
    }
}