/* ==================================================
   EDUCATION.CSS — ETROYL ACADEMY
   ==================================================
   PURPOSE: Presentation for the ETROYL Academy page and its
   technical resource-library components.
   ================================================== */

.page-intro {
    padding-block: var(--space-xl) var(--space-lg);
    text-align: center;
}

.page-intro h1 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-xs);
}

.page-intro p {
    max-width: 760px;
    margin-inline: auto;
    color: var(--color-text-muted);
}

.page-intro__subtitle {
    margin-bottom: var(--space-sm);
    color: var(--color-text) !important;
    font-size: var(--text-lg);
    font-weight: 600;
}

.education-purpose {
    padding-block: var(--space-lg);
    border-block: 1px solid var(--color-border);
    background: var(--color-surface);
}

.education-purpose__content {
    max-width: 800px;
}

.education-purpose__content h2,
.education-library__heading h2 {
    margin-bottom: var(--space-sm);
}

.education-purpose__content p,
.education-library__heading p {
    max-width: 760px;
    color: var(--color-text-muted);
    line-height: 1.75;
}

.education-purpose__link {
    display: inline-block;
    margin-top: var(--space-sm);
    color: var(--color-accent);
    text-decoration: none;
}

.education-purpose__link:hover,
.education-purpose__link:focus-visible {
    text-decoration: underline;
}

.education-library {
    padding-block: var(--space-xl);
}

.education-library__heading {
    margin-bottom: var(--space-md);
}

/* -- Topic Filters -- */
.filter-bar {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: var(--text-sm);
    line-height: 1.25;
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.filter-btn:hover,
.filter-btn:focus-visible {
    color: var(--color-text);
    border-color: var(--color-accent);
}

.filter-btn[aria-pressed="true"] {
    color: var(--color-background);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

/* -- Resource Grid -- */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md);
}

.resource-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.resource-card__media {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--color-background);
    display: flex;
    align-items: center;
    justify-content: center;
}

.resource-card__media img,
.resource-card__media video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.resource-card__doc-badge {
    font-size: var(--text-sm);
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    text-transform: uppercase;
}

.resource-card__body {
    padding: var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    flex-grow: 1;
}

.resource-card__metadata {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35em;
    margin: 0;
    color: var(--color-accent);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.resource-card__separator {
    color: var(--color-text-muted);
}

.resource-card__title {
    font-size: var(--text-base);
    font-weight: 600;
}

.resource-card__description {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    flex-grow: 1;
}

.resource-card__link {
    font-size: var(--text-sm);
    color: var(--color-accent);
    align-self: flex-start;
}

.resource-card__link:hover,
.resource-card__link:focus-visible {
    text-decoration: underline;
}

.empty-state {
    text-align: center;
    color: var(--color-text-muted);
    padding-block: var(--space-xl);
    border: 1px dashed var(--color-border);
    border-radius: var(--border-radius);
}

.empty-state a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.empty-state a:hover,
.empty-state a:focus-visible {
    color: var(--color-text);
}