/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-bg: #f8fafc;
    --color-white: #ffffff;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --color-green: #16a34a;
    --color-red: #dc2626;
    --color-yellow: #f59e0b;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --container: 1200px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
}

.header__logo img {
    height: 40px;
    width: auto;
    display: block;
}
.header__logo {
    text-decoration: none;
}
.header__logo:hover {
    text-decoration: none;
}
.footer__logo {
    height: 45px;
    width: auto;
    margin-bottom: 12px;
    filter: brightness(0) invert(1);
}

/* ===== HEADER ===== */
.header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    position: relative;
}
.header__logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-primary);
    text-decoration: none;
}
.header__nav {
    display: flex;
    align-items: center;
    gap: 20px;
}
.header__nav-link {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    transition: color 0.2s;
}
.header__nav-link:hover {
    color: var(--color-primary);
    text-decoration: none;
}
.header__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}
.header__burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: 0.3s;
}

/* Dropdown */
.header__dropdown {
    position: relative;
}
.header__dropdown-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    padding: 0;
    transition: color 0.2s;
}
.header__dropdown-btn:hover {
    color: var(--color-primary);
}
.header__dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    min-width: 230px;
    padding: 8px 0;
    z-index: 1000;
}
.header__dropdown:hover .header__dropdown-menu {
    display: block;
}
.header__dropdown-item {
    display: block;
    padding: 10px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s;
}
.header__dropdown-item:hover {
    background: #f0f2f5;
    color: var(--color-primary);
    text-decoration: none;
}

/* ===== HERO ===== */
.hero {
    text-align: center;
    padding: 48px 0 32px;
}
.hero h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.hero p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== ARTICLES GRID ===== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin: 32px 0;
}
.articles-grid__empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-light);
    padding: 48px 0;
}

/* ===== CARD ===== */
.card {
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: box-shadow 0.3s, transform 0.3s;
}
.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.card__image { width: 100%; height: 200px; object-fit: cover; }
.card__image--placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 200px;
}
.card__body { padding: 20px; }
.card__category {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    text-decoration: none;
}
.card__title { font-size: 1.15rem; font-weight: 700; line-height: 1.4; margin-bottom: 8px; }
.card__title a { color: var(--color-text); text-decoration: none; }
.card__title a:hover { color: var(--color-primary); }
.card__excerpt { font-size: 0.9rem; color: var(--color-text-light); margin-bottom: 12px; }
.card__meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--color-text-light);
}

/* ===== ARTICLE PAGE ===== */
.breadcrumbs { font-size: 0.85rem; color: var(--color-text-light); padding: 16px 0; }
.breadcrumbs a { color: var(--color-text-light); }
.breadcrumbs a:hover { color: var(--color-primary); }
.breadcrumbs span { margin: 0 6px; }

.article-page { max-width: 860px; margin: 0 auto; }
.article-page__header { margin-bottom: 32px; }
.article-page__header h1 { font-size: 2rem; font-weight: 800; line-height: 1.3; margin-bottom: 12px; }
.article-page__meta { display: flex; gap: 20px; color: var(--color-text-light); font-size: 0.9rem; }

.toc {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 32px;
}
.toc h3 { font-size: 1rem; margin-bottom: 12px; }
.toc ol { padding-left: 20px; display: flex; flex-direction: column; gap: 6px; }
.toc a { color: var(--color-text); font-size: 0.95rem; }
.toc a:hover { color: var(--color-primary); }

.article-page__content { font-size: 1.05rem; line-height: 1.75; margin-bottom: 40px; }
.article-page__content p { margin-bottom: 16px; }
.article-page__content h2 { font-size: 1.5rem; margin: 32px 0 16px; }
.article-page__content h3 { font-size: 1.2rem; margin: 24px 0 12px; }
.article-page__content ul, .article-page__content ol { padding-left: 24px; margin-bottom: 16px; }
.article-page__content li { margin-bottom: 6px; }

/* ===== PRODUCT CARD ===== */
.product {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    overflow: hidden;
}
.product__header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
}
.product__number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}
.product__title { font-size: 1.25rem; font-weight: 700; }
.product__body { display: flex; gap: 24px; padding: 24px; }
.product__image { flex-shrink: 0; width: 250px; }
.product__image img { border-radius: 8px; width: 100%; object-fit: contain; max-height: 250px; }
.product__info { flex: 1; }
.product__rating { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.product__rating-stars { color: var(--color-yellow); font-size: 1.2rem; }
.product__rating-value { font-weight: 600; color: var(--color-text); }
.product__price { font-size: 1.5rem; font-weight: 800; color: var(--color-text); margin-bottom: 16px; }
.product__specs {
    background: #f1f5f9;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.88rem;
    color: #475569;
    margin-bottom: 12px;
    line-height: 1.6;
}
.product__description { margin-bottom: 14px; font-size: 0.95rem; line-height: 1.7; color: #334155; }
.product__pros, .product__cons {
    margin-bottom: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.95rem;
}
.product__pros { background: #f0fdf4; border-left: 3px solid var(--color-green); }
.product__cons { background: #fef2f2; border-left: 3px solid var(--color-red); }
.product__pros h4, .product__cons h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}
.product__pros h4 { color: var(--color-green); }
.product__cons h4 { color: var(--color-red); }
.product__btn {
    display: inline-block;
    background: var(--color-primary);
    color: white;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: background 0.2s;
    margin-top: 8px;
}
.product__btn:hover { background: var(--color-primary-dark); text-decoration: none; color: white; }

/* Reviews */
.product__reviews { border-top: 1px solid #e2e8f0; padding: 20px 24px; }
.product__reviews-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 14px; color: #1e293b; }
.review { background: #f8fafc; border-radius: 10px; padding: 14px 18px; margin-bottom: 10px; }
.review:last-child { margin-bottom: 0; }
.review__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.review__author { font-weight: 600; font-size: 0.9rem; color: #1e293b; }
.review__rating { color: #f59e0b; font-size: 0.95rem; letter-spacing: 1px; }
.review__text { font-size: 0.9rem; line-height: 1.6; color: #475569; }

/* ===== RELATED ===== */
.related { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--color-border); }
.related h2 { font-size: 1.3rem; margin-bottom: 20px; }
.related__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}
.related__item {
    display: flex; flex-direction: column; gap: 8px;
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    text-decoration: none;
    transition: box-shadow 0.3s;
}
.related__item:hover { box-shadow: var(--shadow-lg); text-decoration: none; }
.related__item img { width: 100%; height: 130px; object-fit: cover; }
.related__item span { padding: 8px 12px 12px; font-size: 0.9rem; color: var(--color-text); font-weight: 500; }

/* ===== POPULAR ===== */
.popular-section {
    margin: 40px 0; padding: 24px;
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.popular-section h2 { font-size: 1.2rem; margin-bottom: 16px; }
.popular-list { display: flex; flex-direction: column; gap: 8px; }
.popular-item {
    display: flex; align-items: center; gap: 12px;
    padding: 8px 12px; border-radius: 8px;
    text-decoration: none; transition: background 0.2s;
}
.popular-item:hover { background: var(--color-bg); text-decoration: none; }
.popular-item__num { font-weight: 700; color: var(--color-primary); font-size: 1.1rem; width: 24px; text-align: center; }
.popular-item__title { color: var(--color-text); font-size: 0.95rem; }

/* ===== CATEGORY PAGE ===== */
.category-page h1 { font-size: 1.8rem; margin: 24px 0 8px; }
.category-page__desc { color: var(--color-text-light); margin-bottom: 16px; }

/* ===== PAGINATION ===== */
.pagination { display: flex; justify-content: center; align-items: center; gap: 4px; margin: 32px 0; }
.pagination__link {
    display: flex; align-items: center; justify-content: center;
    min-width: 40px; height: 40px; padding: 0 12px;
    border-radius: 8px; font-size: 0.95rem; font-weight: 500;
    color: var(--color-text); text-decoration: none; transition: background 0.2s;
}
.pagination__link:hover { background: var(--color-white); text-decoration: none; }
.pagination__link--active { background: var(--color-primary); color: white; }
.pagination__dots { color: var(--color-text-light); }

/* ===== 404 ===== */
.not-found { text-align: center; padding: 80px 0; }
.not-found h1 { font-size: 4rem; color: var(--color-primary); }
.not-found p { margin: 12px 0 24px; color: var(--color-text-light); }

/* ===== FOOTER ===== */
.footer {
    background: #1e293b;
    color: #94a3b8;
    padding: 50px 0 0;
    margin-top: 64px;
    font-size: 14px;
    line-height: 1.7;
}
.footer a { color: #94a3b8; text-decoration: none; }
.footer a:hover { color: #fff; text-decoration: none; }
.footer__inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer__col h3 {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
}
.footer__col p { color: #94a3b8; font-size: 0.9rem; line-height: 1.8; }
.footer__col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer__col ul li a {
    color: #94a3b8;
    font-size: 0.9rem;
    transition: color 0.2s, padding-left 0.2s;
}
.footer__col ul li a:hover { color: #fff; padding-left: 5px; }
.footer__bottom {
    border-top: 1px solid #334155;
    padding: 20px 0;
    text-align: center;
}
.footer__bottom p { color: #64748b; margin: 0; }
.footer__disclaimer {
    margin-top: 8px;
    font-size: 0.78rem;
    color: #475569;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .header__nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-white);
        padding: 16px 20px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        gap: 12px;
    }
    .header__nav.active {
        display: flex;
    }
    .header__burger { display: flex; }

    .header__dropdown-menu {
        position: static;
        box-shadow: none;
        background: #f1f5f9;
        border-radius: 8px;
        margin-top: 8px;
    }
    .header__dropdown-item { color: var(--color-text); }
    .header__dropdown-item:hover { background: #e2e8f0; }

    .hero h1 { font-size: 1.5rem; }
    .articles-grid { grid-template-columns: 1fr; }
    .product__body { flex-direction: column; }
    .product__image { width: 100%; }
    .product__image img { max-height: 300px; margin: 0 auto; }
    .article-page__header h1 { font-size: 1.5rem; }
    .footer__inner { grid-template-columns: 1fr; gap: 24px; }
    .related__grid { grid-template-columns: 1fr 1fr; }
}
/* ===== SEARCH OVERLAY ===== */
.header__actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header__search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: none;
    background: var(--color-bg);
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.2s;
}

.header__search-btn:hover {
    background: var(--color-primary);
    color: #fff;
}

.search-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    padding: 80px 20px 20px;
    animation: fadeIn 0.2s ease;
}

.search-overlay.active {
    display: block;
}

.search-overlay__inner {
    max-width: 640px;
    margin: 0 auto;
}

.search-box {
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 16px;
    padding: 4px 8px 4px 18px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    gap: 12px;
}

.search-box__icon {
    flex-shrink: 0;
}

.search-box__input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 18px;
    padding: 16px 0;
    font-family: inherit;
    color: var(--color-text);
    background: transparent;
}

.search-box__input::placeholder {
    color: #94a3b8;
}

.search-box__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: none;
    background: var(--color-bg);
    color: var(--color-text-light);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.search-box__close:hover {
    background: #fee2e2;
    color: var(--color-red);
}

.search-results {
    margin-top: 12px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    overflow: hidden;
    max-height: 60vh;
    overflow-y: auto;
}

.search-results:empty {
    display: none;
}

.search-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    text-decoration: none;
    transition: background 0.15s;
    border-bottom: 1px solid #f1f5f9;
}

.search-item:last-child {
    border-bottom: none;
}

.search-item:hover {
    background: #f8fafc;
    text-decoration: none;
}

.search-item__img {
    width: 56px;
    height: 56px;
    border-radius: 10px;
    object-fit: cover;
    flex-shrink: 0;
}

.search-item__img--empty {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.search-item__text {
    flex: 1;
    min-width: 0;
}

.search-item__title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.search-item__cat {
    font-size: 12px;
    color: var(--color-primary);
    margin-top: 2px;
    font-weight: 500;
}

.search-loading,
.search-empty {
    padding: 24px;
    text-align: center;
    color: var(--color-text-light);
    font-size: 15px;
}

/* ===== INFINITE SCROLL ===== */
.load-more {
    display: flex;
    justify-content: center;
    padding: 40px 0;
}

.load-more__spinner {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text-light);
    font-size: 15px;
}

.spinner {
    width: 28px;
    height: 28px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== CARD ANIMATIONS ===== */
.card.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.card.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===== SEARCH RESPONSIVE ===== */
@media (max-width: 768px) {
    .search-overlay {
        padding: 20px 12px;
    }
    
    .search-box {
        border-radius: 12px;
    }
    
    .search-box__input {
        font-size: 16px;
    }
    
    .search-results {
        border-radius: 12px;
        max-height: 70vh;
    }
}
/* ===== ARTICLE SEO EXTRAS ===== */
.article-page__category {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-decoration: none;
}
.article-page__category:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
    color: #fff;
}