:root {
    --primary: #c00;
    --bg: #f4f6f8;
    --card-bg: #fff;
    --border: #e5e7eb;
    --text: #111;
    --muted: #6b7280;
}

/* Container */
.page-container {
    margin: 0;
    padding: 24px;
    min-height: 100vh;
}

/* Breadcrumb */
.breadcrumb {
    font-size: 0.9rem;
    margin-bottom: 24px;
    color: var(--text);
    margin-top: 20px;
}

.breadcrumb a {
    color: var(--text);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Layout */
.layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
}

/* Sidebar */
.sidebar {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 22px;
    border: 1px solid var(--border);
    height: fit-content;
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 18px;
}

.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-list li {
    margin-bottom: 12px;
}

.category-list label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.95rem;
    color: #333;
}

.category-list input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
}

/* Content */
.content {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 24px;
    border: 1px solid var(--border);
}

/* Grid */
.post-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

/* Card */
.post-card {
    background: var(--card-bg);
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform .25s ease, box-shadow .25s ease;
}

.post-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, .08);
}

.post-card a {
    text-decoration: none;
    color: inherit;
    display: block;
}

/* Image */
.thumb {
    overflow: hidden;
}

.thumb img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform .4s ease;
}

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

/* Title */
.post-card h2 {
    font-size: 0.95rem;
    font-weight: 600;
    padding: 14px 14px 8px;
    line-height: 1.4;
}

/* Meta */
.meta {
    font-size: 0.8rem;
    color: var(--muted);
    padding: 0 14px 16px;
}

/* Responsive */
@media (max-width: 1200px) {
    .post-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .post-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .post-grid {
        grid-template-columns: 1fr;
    }
}

.page-single .header {
    background: #ffffff;
    box-shadow: 0 4px 30px rgba(0, 0, 0, .08);
}

.page-single .logo,
.page-single .nav-menu a,
.page-single .search-btn, .page-single .search-box input::placeholder {
    color: var(--text-dark);
}

.page-single .search-box input {
    color: black;
}
  .page-single .search-box {
      border: 1px solid black;
      border-radius: 20px;
  }

.page-single .mobile-search-trigger {
    color: var(--text-dark);
}

.page-single .menu-toggle span {
    background: var(--text-dark);
}

/* Chừa chỗ cho header fixed */
.page-single .page-content {
    padding-top: 50px;
}