/* Main CSS (Header, Footer, Shared) */

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg-white);
    border-radius: 0 0 16px 16px;
    box-shadow: var(--shadow-sm);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-text { font-weight: 800; font-size: 1.25rem; letter-spacing: -0.5px; }
.logo-writer { color: var(--color-text); }
.logo-dao { color: var(--color-accent); }

/* Primary Nav */
.primary-nav .nav-list {
    display: flex;
    gap: 32px;
    position: relative;
}
.primary-nav li {
    position: relative;
}
.primary-nav a {
    display: block;
    font-weight: 500;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    position: relative;
    padding: 8px 0;
    transition: color var(--transition-fast);
}
.primary-nav a:hover,
.primary-nav .current-menu-item > a {
    color: var(--color-primary);
}

/* Chỉ hiện viền dưới cho menu cấp 1 */
.primary-nav > .nav-list > .current-menu-item > a::after,
.primary-nav > .nav-list > .current-menu-ancestor > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-accent);
    border-radius: 3px 3px 0 0;
}

/* Dropdown Sub-menu */
.primary-nav .menu-item-has-children > a {
    padding-right: 16px; /* Chừa chỗ cho icon mũi tên */
}
.primary-nav .menu-item-has-children > a::before {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: translateY(-70%) rotate(45deg);
    transition: transform var(--transition-fast);
}
.primary-nav .menu-item-has-children:hover > a::before {
    transform: translateY(-30%) rotate(225deg);
}
.primary-nav .sub-menu {
    display: none; /* Thay opacity bằng display để chắc chắn ẩn */
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    padding: 8px 0;
    z-index: 200;
    border: 1px solid var(--color-border);
}
/* Hiển thị menu cấp 2 khi hover trên desktop */
@media (min-width: 769px) {
    .primary-nav li:hover > .sub-menu {
        display: block;
        animation: fadeInDown 0.2s ease forwards;
    }
}
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
/* Menu cấp 3 trở đi hiển thị sang bên phải */
.primary-nav .sub-menu .sub-menu {
    top: -9px;
    left: 100%;
}
.primary-nav .sub-menu a {
    padding: 10px 20px;
    font-size: 14px;
    color: var(--color-text);
}
.primary-nav .sub-menu a:hover {
    background: var(--color-bg-light);
    color: var(--color-primary);
}

/* Actions */
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-search-btn {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: var(--color-bg-light);
    color: var(--color-text);
    transition: all var(--transition-fast);
}
.header-search-btn:hover {
    background: var(--color-primary);
    color: white;
}
.hamburger { display: none; }

/* Search Overlay */
.search-overlay {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-bg-white);
    padding: 32px 0;
    box-shadow: var(--shadow-md);
    border-radius: 0 0 16px 16px;
    border-top: 1px solid var(--color-border);
}
.search-overlay__form {
    display: flex;
    align-items: center;
    position: relative;
    margin-bottom: 24px;
}
.search-overlay__input {
    width: 100%;
    padding: 16px 48px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--text-lg);
    background: var(--color-bg-light);
}
.search-overlay__input:focus {
    border-color: var(--color-primary);
    outline: none;
    background: white;
}
.search-overlay__submit {
    position: absolute; left: 16px; color: var(--color-text-muted);
}
.search-overlay__close {
    position: absolute; right: 16px; color: var(--color-text-muted);
}
.search-overlay__tags {
    display: flex; gap: 12px; align-items: center; font-size: var(--text-sm);
}
.search-overlay__tags a {
    padding: 6px 16px; background: var(--color-bg-light); border-radius: var(--radius-full);
}
.search-result-item {
    display: flex; align-items: center; gap: 12px; padding: 12px;
    border-bottom: 1px solid var(--color-border);
}
.search-result-item img { border-radius: 6px; }
.search-result-item:hover { background: var(--color-bg-light); }

/* Breadcrumb */
.breadcrumb { margin-bottom: 24px; }
.breadcrumb-list {
    display: flex; gap: 8px; font-size: 13px; color: var(--color-text-muted);
}
.breadcrumb-list a:hover { color: var(--color-primary); }
.breadcrumb-list [aria-current] { font-weight: 600; color: var(--color-primary); }

/* Newsletter */
.newsletter { padding: 80px 0; }
.newsletter__inner {
    background: #E8F4EC;
    border-radius: 20px;
    padding: 48px;
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: 32px;
    align-items: center;
    position: relative;
}
.newsletter--dark .newsletter__inner { background: var(--color-primary-dark); color: white; }
.newsletter__text h3 { font-size: 20px; margin-bottom: 8px; }
.newsletter__form {
    display: flex; gap: 8px; background: white; padding: 6px; border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
}
.newsletter__form input {
    flex: 1; border: none; padding: 0 16px; background: transparent; outline: none;
}
.newsletter__note { position: absolute; bottom: 20px; right: 48px; font-size: 11px; opacity: 0.6; }

/* Category Card */
.cat-card {
    display: flex; align-items: center; gap: 16px;
    background: white; padding: 16px; border-radius: 14px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.cat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.cat-card__thumb { width: 48px; height: 48px; border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.cat-card__info { display: flex; flex-direction: column; }
.cat-card__name { font-weight: 600; font-size: 15px; }
.cat-card__count { font-size: 12px; color: var(--color-text-muted); }
.cat-card__arrow { margin-left: auto; opacity: 0.3; }
.cat-card:hover .cat-card__arrow { opacity: 1; color: var(--color-primary); transform: translateX(3px); }

/* Post Card */
.post-card { position: relative; }
.post-card__image-wrap { position: relative; aspect-ratio: 16/10; overflow: hidden; border-radius: 14px 14px 0 0; display: block; }
.post-card__image-placeholder { width: 100%; height: 100%; background: var(--color-bg-light); }
.post-card__cat { position: absolute; top: 16px; left: 16px; color: white; font-size: 11px; font-weight: 600; padding: 4px 10px; border-radius: 20px; }
.post-card__bookmark { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; background: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; opacity: 0; transform: translateY(-5px); transition: all var(--transition-fast); color: var(--color-text-muted); }
.post-card:hover .post-card__bookmark { opacity: 1; transform: translateY(0); }
.post-card__bookmark:hover, .post-card__bookmark.is-bookmarked { color: var(--color-accent); }
.post-card__bookmark.is-bookmarked svg path { fill: currentColor; }
.post-card__body { padding: 24px; border: 1px solid var(--color-border); border-top: none; border-radius: 0 0 14px 14px; background: white; }
.post-card__title { font-size: 18px; margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card__excerpt { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card--small .post-card__title { font-size: 16px; }

/* Series Card */
.series-card { position: relative; padding: 24px; border-radius: 16px; min-height: 160px; display: flex; flex-direction: column; justify-content: flex-end; transition: transform var(--transition-fast); }
.series-card:hover { transform: translateY(-5px); }
.series-card__name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.series-card__count { font-size: 13px; opacity: 0.8; }
.series-card__arrow { position: absolute; top: 24px; right: 24px; width: 32px; height: 32px; background: rgba(255,255,255,0.2); border-radius: 50%; display: flex; align-items: center; justify-content: center; }

/* Pagination */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 48px; }
.pagination .page-numbers { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; font-weight: 600; font-size: 14px; background: white; border: 1px solid var(--color-border); }
.pagination .page-numbers:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination .current { background: var(--color-primary); color: white; border-color: var(--color-primary); }

/* Footer */
.site-footer { background: white; border-top: 1px solid var(--color-border); padding-top: 64px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-col__title { font-size: 16px; margin-bottom: 24px; }
.footer-desc { margin: 24px 0; font-size: 14px; color: var(--color-text-secondary); max-width: 300px; }
.footer-social { display: flex; gap: 12px; }
.social-icon { width: 36px; height: 36px; border-radius: 50%; background: var(--color-bg-light); display: flex; align-items: center; justify-content: center; color: var(--color-text-secondary); transition: all var(--transition-fast); }
.social-icon:hover { background: var(--color-primary); color: white; }
.footer-nav li { margin-bottom: 12px; }
.footer-nav a { font-size: 14px; color: var(--color-text-secondary); }
.footer-nav a:hover { color: var(--color-primary); }
.footer-bottom { border-top: 1px solid var(--color-border); padding: 24px 0; text-align: center; font-size: 13px; color: var(--color-text-muted); }

/* Mobile */
@media (max-width: 768px) {
    .primary-nav { display: none; }
    .primary-nav.is-open {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        padding: 24px;
        box-shadow: var(--shadow-md);
        border-radius: 0 0 16px 16px;
        border-top: 1px solid var(--color-border);
    }
    .primary-nav.is-open .nav-list {
        flex-direction: column;
        gap: 0;
    }
    .primary-nav.is-open .nav-list > li > a {
        padding: 16px 0;
        border-bottom: 1px solid var(--color-border);
        font-size: 16px;
    }
    .primary-nav.is-open .nav-list > li:last-child > a { border-bottom: none; }
    
    /* Submenu on mobile */
    .primary-nav .sub-menu {
        position: static;
        box-shadow: none;
        border: none;
        padding: 0 0 0 20px;
        margin: 0;
        display: none;
        min-width: 100%;
    }
    .primary-nav .menu-item-has-children.is-expanded > .sub-menu {
        display: block;
    }
    .primary-nav .menu-item-has-children > a::before {
        right: 0;
        transform: translateY(-50%) rotate(45deg);
        padding: 10px;
    }
    .primary-nav .menu-item-has-children.is-expanded > a::before {
        transform: translateY(-50%) rotate(225deg);
    }

    .hamburger { display: flex; flex-direction: column; gap: 5px; background: transparent; padding: 5px; border: none; cursor: pointer; }
    .hamburger-line { width: 24px; height: 2px; background: var(--color-text); transition: all 0.3s; }
    .hamburger.is-active .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .hamburger.is-active .hamburger-line:nth-child(2) { opacity: 0; }
    .hamburger.is-active .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-col--brand { grid-column: 1 / -1; }
    .newsletter__inner { grid-template-columns: 1fr; text-align: center; }
    .newsletter__note { position: static; margin-top: 16px; }
}