:root {
    --neon-color: #0fa;
    --bg-color: #111;
    --text-color: #fff;
    --card-bg: #222;
    --hover-color: #3cf;
    --header-bg: #1a1a1a;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
}

/* Шапка */
header {
    background-color: var(--header-bg);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--neon-color);
    box-shadow: 0 0 20px rgba(0, 255, 170, 0.2);
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--neon-color);
}
.logo h1 {
    color: var(--neon-color);
    font-size: 22px;
    text-shadow: 0 0 5px var(--neon-color);
}
nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}
nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s;
    padding: 5px 10px;
    border-radius: 5px;
}
nav a:hover {
    color: var(--neon-color);
    text-shadow: 0 0 5px var(--neon-color);
    background-color: rgba(0, 255, 170, 0.1);
}

.main-container {
    padding: 20px;
}
.container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    gap: 20px;
    position: relative;
}

/* Стили для поиска */
.search-container {
    margin-bottom: 30px;
    position: relative;
}
.search-container input {
    width: 100%;
    padding: 12px 20px;
    border: 2px solid var(--neon-color);
    border-radius: 30px;
    background-color: transparent;
    color: var(--text-color);
    font-size: 16px;
    outline: none;
    box-shadow: 0 0 10px var(--neon-color);
    transition: all 0.3s;
}
.search-container input:focus {
    box-shadow: 0 0 20px var(--neon-color);
}

/* Стили для категорий */
.categories h2 {
    color: var(--neon-color);
    margin-bottom: 15px;
    font-size: 22px;
    text-shadow: 0 0 5px var(--neon-color);
}
.category-list {
    list-style: none;
}
.category-item {
    padding: 10px 15px;
    margin-bottom: 8px;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s;
    background-color: var(--card-bg);
    border-left: 3px solid transparent;
}
.category-item:hover, .category-item.active {
    border-left: 3px solid var(--neon-color);
    color: var(--neon-color);
    text-shadow: 0 0 5px var(--neon-color);
}
.category-scroll-container {
    overflow-x: auto;
    padding-bottom: 10px;
    scrollbar-width: thin;
    scrollbar-color: var(--neon-color) var(--card-bg);
}
.category-scroll-container::-webkit-scrollbar {
    height: 6px;
}
.category-scroll-container::-webkit-scrollbar-track {
    background: var(--card-bg);
    border-radius: 3px;
}
.category-scroll-container::-webkit-scrollbar-thumb {
    background-color: var(--neon-color);
    border-radius: 3px;
}
.category-list {
    display: inline-flex;
    flex-wrap: nowrap;
    gap: 10px;
    padding-bottom: 5px;
}
.category-item {
    white-space: nowrap;
    margin-bottom: 0;
    flex-shrink: 0;
}
.categories {
    width: 250px;
    flex-shrink: 0;
}
.categories-header {
    margin-bottom: 15px;
}
.category-search {
    position: relative;
    margin-top: 10px;
}
.category-search input {
    width: 100%;
    padding: 8px 30px 8px 10px;
    border: 1px solid var(--neon-color);
    border-radius: 15px;
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-color);
    outline: none;
}

/* Дополнительные фильтры */
.additional-filters {
    width: 250px;
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid var(--neon-color);
    box-shadow: 0 0 15px rgba(0, 255, 170, 0.2);
    margin-left: 20px;
    flex-shrink: 0;
}
.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}
.filter-header h2 {
    color: var(--neon-color);
    font-size: 18px;
}
.close-filters {
    background: none;
    border: none;
    color: var(--neon-color);
    font-size: 24px;
    cursor: pointer;
    display: none;
    transition: all 0.3s;
}
.close-filters:hover {
    transform: rotate(90deg);
    color: var(--hover-color);
}
.filter-group {
    margin-bottom: 15px;
}
.filter-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--neon-color);
}
.filter-group input {
    width: 100%;
    padding: 8px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--neon-color);
    border-radius: 5px;
    color: white;
}
.reset-filters {
    width: 100%;
    padding: 8px;
    background: rgba(255, 0, 0, 0.2);
    border: 1px solid #ff5555;
    border-radius: 5px;
    color: #ff5555;
    cursor: pointer;
    transition: all 0.3s;
}
.reset-filters:hover {
    background: rgba(255, 0, 0, 0.3);
    color: #ff3333;
    border-color: #ff3333;
}
.mobile-filter-btn {
    display: none;
    padding: 10px 15px;
    background: var(--neon-color);
    color: var(--bg-color);
    border: none;
    border-radius: 5px;
    margin: 10px auto;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
}
.mobile-filter-btn:hover {
    background: var(--hover-color);
    box-shadow: 0 0 10px var(--hover-color);
}

/* Стили для карточек статей */
.articles {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}
.article-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}
.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 2px solid var(--neon-color);
    border-radius: 10px;
    opacity: 0;
    transition: all 0.3s;
    pointer-events: none;
}
.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 255, 170, 0.3);
}
.article-card:hover::before {
    opacity: 1;
    box-shadow: 0 0 20px var(--neon-color);
}
.article-card h3 {
    color: var(--neon-color);
    margin-bottom: 15px;
    font-size: 18px;
}
.article-card .card-meta {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    gap: 10px;
}
.article-card .card-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--neon-color);
}
.article-card .card-author {
    font-size: 14px;
    color: var(--neon-color);
}
.article-card .card-date {
    font-size: 12px;
    color: #aaa;
    margin-left: auto;
}
.article-card .card-category {
    display: inline-block;
    padding: 3px 8px;
    background-color: rgba(0, 255, 170, 0.1);
    color: var(--neon-color);
    border-radius: 15px;
    font-size: 12px;
    margin-bottom: 10px;
}
.article-card p {
    color: #ccc;
    font-size: 14px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Стили для попапа */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}
.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}
.popup-content {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 30px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    border: 2px solid var(--neon-color);
    box-shadow: 0 0 30px var(--neon-color);
}
.popup-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 30px;
    height: 30px;
    cursor: pointer;
    transition: all 0.3s;
    color: var(--neon-color);
    font-size: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}
.popup-close:hover {
    transform: rotate(90deg);
    color: var(--hover-color);
    text-shadow: 0 0 10px var(--hover-color);
}
.popup-title {
    color: var(--neon-color);
    margin-bottom: 20px;
    font-size: 24px;
    text-shadow: 0 0 5px var(--neon-color);
    padding-right: 30px;
}
.article-meta {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 10px;
}
.article-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--neon-color);
}
.article-author {
    font-weight: bold;
    color: var(--neon-color);
}
.article-date {
    color: #aaa;
    font-size: 14px;
}
.article-text {
    line-height: 1.6;
    color: #ddd;
}
.article-text img {
    max-width: 100%;
    height: auto;
    margin: 15px 0;
    border-radius: 5px;
    border: 1px solid var(--neon-color);
}
.article-text iframe {
    width: 100%;
    height: 400px;
    border: none;
    border-radius: 5px;
    margin: 15px 0;
    border: 1px solid var(--neon-color);
}
.article-text a {
    color: var(--neon-color);
    text-decoration: none;
    transition: all 0.3s;
}
.article-text a:hover {
    color: var(--hover-color);
    text-shadow: 0 0 5px var(--hover-color);
}

/* Стили для сообщения "Статей не найдено" */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 50px;
    color: #ff5555;
    font-size: 20px;
    display: none;
}
.no-results.active {
    display: block;
}

/* Адаптация */
@media (max-width: 1200px) {
    .container {
        flex-wrap: wrap;
    }
    .categories, .additional-filters {
        width: 100%;
        margin-left: 0;
    }
    .main-content {
        order: 3;
        width: 100%;
    }
    .additional-filters {
        order: 2;
        margin-top: 20px;
    }
}

@media (max-width: 992px) {
    .additional-filters {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        z-index: 1001;
        margin: 0;
        transition: right 0.3s;
    }
    .additional-filters.active {
        right: 0;
    }
    .close-filters {
        display: block;
    }
    .mobile-filter-btn {
        display: block;
    }
    header {
        flex-direction: column;
        gap: 15px;
    }
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    nav ul {
        gap: 10px;
    }
    nav a {
        font-size: 14px;
        padding: 5px 8px;
    }
    .articles {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .popup-content {
        padding: 20px;
    }
    .popup-title {
        font-size: 20px;
    }
    .article-text iframe {
        height: 250px;
    }
}