/* Base Wrapper */
.learn-page-wrapper {
    min-height: 100vh;
    background-color: var(--body-bg);
    font-family: var(--body-font);
    color: var(--text);
}

/* Header Sections */
.hero-section {
    background-color: var(--second-bg);
}
.hero-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 5rem 1.5rem;
    text-align: center;
}
h1.hero-title {
    font-family: var(--title-font);
    color: var(--text);
    font-size: 40px;
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}
.hero-description {
    max-width: 42rem;
    margin: 1.25rem auto 0 auto;
    color: var(--about-text);
    line-height: 1.625;
}

/* Real-time Search Box */
.search-bar {
    max-width: 36rem;
    margin: 2.5rem auto 0 auto;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: #ffffff;
    border: 1px solid var(--border);
    border-radius: 9999px;
    padding: 0.75rem 1.25rem;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.search-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--about-text);
}
.search-input {
    width: 100%;
    background-color: transparent;
    border: none;
    font-size: 0.875rem;
    color: var(--text);
    outline: none;
}
.search-input::placeholder {
    color: var(--about-text);
}

/* Content Layout Containers */
.content-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

/* Category Selection Row */
.filter-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}
.filter-btn {
    cursor: pointer;
    font-family: var(--body-font);
    font-size: 0.875rem;
    background-color: #ffffff;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 9999px;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
}
.filter-btn:hover {
    border-color: var(--primary);
}
.filter-btn.active {
    background-color: var(--primary);
    color: var(--primary-foreground);
    border-color: var(--primary);
}

/* Dynamic Query Post Grid */
.articles-grid {
    margin-top: 3rem;
    display: grid;
    gap: 1.5rem;
    transition: opacity 0.2s ease;
}
.loading-fade {
    opacity: 0.5;
}
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--about-text);
    padding: 2rem 0;
}

/* Elegant Article Post Card Links */
.article-card {
    display: flex;
    flex-direction: column;
    background-color: #ffffff;
    border: 1px solid var(--border);
    border-radius: 1rem;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
}
.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -20px color-mix(in srgb, var(--text) 25%, transparent);
}
.article-image-wrapper {
    position: relative;
    aspect-ratio: 4 / 3;
    background-color: color-mix(in srgb, var(--text) 6%, transparent);
    overflow: hidden;
}
.article-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1);
    transition: transform 0.7s ease;
}
.article-card:hover .article-image {
    transform: scale(1.05);
}
.article-content {
    display: flex;
    flex-direction: column;
    flex: 1 1 0%;
    padding: 1.5rem;
}
.article-badge {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary);
    margin: 0;
}
.article-title {
    font-family: var(--title-font);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.375;
    color: var(--text);
    margin: 0.75rem 0 0 0;
}
.article-excerpt {
    font-size: 0.875rem;
    line-height: 1.625;
    color: var(--about-text);
    margin: 0.5rem 0 0 0;
}
.article-meta {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--about-text);
    margin: 1.5rem 0 0 0;
}

/* Post Matrix Navigation Pagination */
.articles-pagination {
    margin-top: 3rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}
.articles-pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    height: 2.25rem;
    padding: 0 0.5rem;
    border-radius: 0.375rem;
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text);
    font-family: var(--body-font);
    font-size: 0.875rem;
    transition: all 0.2s ease;
}
.articles-pagination a.page-numbers:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.articles-pagination .page-numbers.current {
    background-color: var(--primary);
    color: var(--primary-foreground);
    border-color: var(--primary);
}

/* Responsive Structural Breakpoints */
@media (min-width: 640px) {
    .hero-title { font-size: 3.5rem; line-height: 1.1; }
    .articles-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
    .articles-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}