* {
    box-sizing: border-box;
}

body {
    background-color: #f4f4f4;
    color: #333;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

a {
    color: #003366;
    text-decoration: none;
}

a:hover {
    color: #002244;
}

.header {
    background-color: #003366;
    box-shadow: none;
    color: #fff;
    padding: 20px;
    position: static;
    text-align: center;
    top: auto;
    width: auto;
}

.header h1 {
    font-size: 28px;
    margin: 0;
}

.header h1 a {
    color: #fff;
}

.header p {
    font-size: 16px;
    margin-top: 5px;
    opacity: 0.86;
}

.main-nav {
    background-color: #002244;
    padding: 0;
    position: relative;
}

.nav-container {
    display: flex;
    justify-content: center;
    margin: 0 auto;
    max-width: 1200px;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-list a {
    color: #fff;
    display: block;
    font-weight: 500;
    padding: 15px 20px;
    text-decoration: none;
    transition: background-color 0.3s;
}

.nav-list a:hover,
.nav-list a.active {
    background-color: #003366;
}

.burger-menu {
    cursor: pointer;
    display: none;
    flex-direction: column;
    height: 21px;
    justify-content: space-between;
    position: absolute;
    right: 20px;
    top: 15px;
    width: 30px;
    z-index: 1000;
}

.burger-menu span {
    background-color: #fff;
    display: block;
    height: 3px;
    transition: all 0.3s;
    width: 100%;
}

.burger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

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

.blog-intro {
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    padding: 24px;
    text-align: center;
}

.blog-intro h2 {
    color: #003366;
    font-size: 28px;
    margin: 0 0 10px;
}

.blog-intro p {
    color: #666;
    margin: 0 auto;
    max-width: 760px;
}

.parts-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.part-card {
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.part-card:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transform: translateY(-5px);
}

.part-image {
    align-items: center;
    background-color: #f1f1f1;
    display: flex;
    height: 200px;
    justify-content: center;
    overflow: hidden;
}

.part-image img {
    height: 100%;
    object-fit: cover;
    transition: transform 0.45s ease;
    width: 100%;
}

.part-card:hover .part-image img {
    transform: scale(1.05);
}

.part-details {
    padding: 15px;
}

.part-details h3 {
    color: #003366;
    display: -webkit-box;
    font-size: 18px;
    height: 52px;
    line-height: 1.45;
    margin: 0 0 10px;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.part-description {
    color: #666;
    display: -webkit-box;
    font-size: 14px;
    margin: 10px 0 0;
    max-height: 70px;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

.pagination a,
.pagination span {
    background-color: #fff;
    border-radius: 4px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
    color: #333;
    display: inline-block;
    margin: 0 5px;
    padding: 8px 12px;
    text-decoration: none;
    transition: background-color 0.3s;
}

.pagination a:hover {
    background-color: #f0f0f0;
}

.pagination .current {
    background-color: #003366;
    color: #fff;
}

.no-results {
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    color: #666;
    margin-bottom: 20px;
    padding: 30px;
    text-align: center;
}

.no-results i {
    color: #003366;
    display: block;
    font-size: 42px;
    margin-bottom: 14px;
}

.blog-article {
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 30px;
}

.blog-article img {
    border-radius: 5px;
    display: block;
    margin: 0 auto 22px;
    max-height: 480px;
    object-fit: contain;
}

.blog-article h1 {
    color: #003366;
    font-size: 32px;
    line-height: 1.25;
    margin: 0 0 18px;
}

.blog-article h2,
.blog-article h3 {
    color: #003366;
    margin-top: 26px;
}

.blog-article ul,
.blog-article ol {
    margin: 0 0 18px 24px;
}

.blog-back {
    display: inline-block;
    font-weight: 700;
    margin-bottom: 18px;
}

.footer {
    background-color: #002244;
    color: #fff;
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-column {
    flex: 1;
    min-width: 200px;
}

.footer-column h3 {
    margin-bottom: 20px;
    font-size: 18px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: #003366;
}

.footer-column ul {
    list-style: none;
    padding: 0;
}

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

.footer-column a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    color: #aaa;
}

.scroll-top {
    align-items: center;
    background-color: #003366;
    border-radius: 50%;
    bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    color: #fff;
    cursor: pointer;
    display: flex;
    height: 50px;
    justify-content: center;
    opacity: 0;
    position: fixed;
    right: 30px;
    transition: opacity 0.3s, visibility 0.3s;
    visibility: hidden;
    width: 50px;
    z-index: 1000;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: #002244;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    transition-delay: calc(var(--card-index, 0) * 0.04s);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .main-nav {
        min-height: 51px;
        overflow: visible;
        position: relative;
        z-index: 1000;
    }

    .nav-container {
        justify-content: flex-start;
        min-height: 51px;
        padding: 0 15px;
        position: relative;
    }

    .nav-list {
        background-color: #002244;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.18);
        display: none !important;
        flex-direction: column;
        left: 0;
        position: absolute;
        top: 100%;
        width: 100%;
        z-index: 1001;
    }

    .nav-list.open {
        display: flex !important;
    }

    .nav-list a {
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        padding: 14px 16px;
        text-align: left;
    }

    .burger-menu {
        display: flex !important;
        position: absolute;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
        z-index: 1002;
    }

    .blog-article {
        padding: 20px;
    }

    .blog-article h1 {
        font-size: 24px;
    }
}

@media (max-width: 900px) {
    .parts-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

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

    .pagination {
        flex-wrap: wrap;
        gap: 8px;
    }

    .pagination a,
    .pagination span {
        margin: 0;
    }
}