/**
 * OAC Academy Catalog Styles
 * Independent CSS tailored to Nova Pelvis identity.
 */

:root {
    --oac-font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --oac-color-primary: #1F2937;
    --oac-color-primary-light: #374151;
    --oac-color-accent: #2563EB;
    --oac-color-accent-hover: #1D4ED8;
    --oac-color-bg-light: #F9FAFB;
    --oac-color-border: #E5E7EB;
    --oac-color-text-muted: #6B7280;
    --oac-radius: 12px;
    --oac-shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --oac-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --oac-shadow-hover: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --oac-transition: all 0.3s ease;
}

/* ==========================================================================
   Layout Base
   ========================================================================== */
.oac-library {
    font-family: var(--oac-font-primary);
    max-width: 1240px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    color: var(--oac-color-primary);
}

.oac-library__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--oac-color-border);
    padding-bottom: 1.5rem;
}

.oac-library__eyebrow {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--oac-color-text-muted);
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.oac-library__title {
    font-size: 2.25rem;
    font-weight: 800;
    margin: 0;
    line-height: 1.2;
    color: var(--oac-color-primary);
}

.oac-library__stats {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.oac-library__stat-item {
    font-size: 0.95rem;
    color: var(--oac-color-text-muted);
}

.oac-stat-value {
    font-weight: 700;
    color: var(--oac-color-primary);
}

.oac-library__stat-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
}

.oac-badge-active {
    background-color: #DEF7EC;
    color: #03543F;
}

.oac-badge-locked {
    background-color: #FEE2E2;
    color: #991B1B;
}

/* ==========================================================================
   Sections & Grid
   ========================================================================== */
.oac-library-section {
    margin-bottom: 4rem;
}

.oac-my-courses-section {
    padding: 2.5rem;
    background: var(--oac-color-bg-light);
    border-radius: var(--oac-radius);
    border: 1px solid var(--oac-color-border);
}

.oac-library-section__head {
    margin-bottom: 2rem;
}

.oac-library-section__head h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
}

.oac-library-section__head p {
    margin: 0;
    color: var(--oac-color-text-muted);
    font-size: 1.05rem;
}

.oac-library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

/* ==========================================================================
   Course Card
   ========================================================================== */
.oac-course-card {
    background: #fff;
    border-radius: var(--oac-radius);
    overflow: hidden;
    border: 1px solid var(--oac-color-border);
    transition: var(--oac-transition);
    box-shadow: var(--oac-shadow-sm);
    position: relative;
    display: flex;
    flex-direction: column;
}

.oac-course-card:hover {
    box-shadow: var(--oac-shadow-hover);
    transform: translateY(-4px);
}

.oac-course-card__media-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.oac-course-card__media-link:hover {
    color: inherit;
}

.oac-course-card__media {
    position: relative;
    aspect-ratio: 16/9;
    background: #E5E7EB;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.oac-course-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--oac-transition);
}

.oac-course-card:hover .oac-course-card__media img {
    transform: scale(1.05);
}

/* States Overlay */
.oac-course-card.is-locked .oac-course-card__media img {
    filter: brightness(0.68) saturate(0.72) grayscale(0.2);
}

.oac-course-card__lock {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background:
        radial-gradient(circle at 32% 24%, rgba(255, 255, 255, 0.2), transparent 34%),
        linear-gradient(145deg, rgba(31, 39, 51, 0.96), rgba(14, 18, 25, 0.96));
    color: #f6d780;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.72);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    box-shadow:
        0 18px 34px rgba(0, 0, 0, 0.32),
        inset 0 0 0 1px rgba(246, 215, 128, 0.22);
}

.oac-course-card__lock::before {
    content: "";
    position: absolute;
    inset: 7px;
    border: 1px solid rgba(246, 215, 128, 0.18);
    border-radius: 50%;
    pointer-events: none;
}

.oac-course-card__lock svg {
    width: 20px;
    height: 20px;
    filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.28));
}

.oac-course-card__badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 10;
    box-shadow: var(--oac-shadow-md);
}

.oac-course-card__count {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(31, 41, 55, 0.85);
    color: #fff;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

.oac-course-card__count::after {
    content: ' lecciones';
}

.oac-course-card__placeholder {
    font-size: 4rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.5);
}

/* Card Content */
.oac-course-card__content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.oac-course-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 0.75rem 0;
    line-height: 1.3;
    color: var(--oac-color-primary);
}

.oac-course-card__title a {
    color: inherit;
    text-decoration: none;
}

.oac-course-card__title a:hover {
    color: var(--oac-color-accent);
}

.oac-course-card__description {
    font-size: 0.95rem;
    color: var(--oac-color-text-muted);
    margin: 0;
    line-height: 1.5;
    flex-grow: 1;
}

/* ==========================================================================
   Call to Action (Visitors)
   ========================================================================== */
.oac-library-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 3rem;
    background: var(--oac-color-primary);
    color: #fff;
    border-radius: var(--oac-radius);
    margin-top: 4rem;
}

.oac-library-cta__content h2 {
    color: #fff;
    margin: 0 0 0.5rem 0;
    font-size: 1.75rem;
}

.oac-library-cta__content p {
    margin: 0;
    color: #D1D5DB;
    font-size: 1.1rem;
}

.oac-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--oac-transition);
}

.oac-btn--outline {
    border: 2px solid #fff;
    color: #fff;
}

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

.oac-btn--primary {
    background: var(--oac-color-accent);
    color: #fff;
}

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

.oac-course-card__cta {
    margin-top: 1rem;
    width: 100%;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
    .oac-library__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .oac-library-grid {
        grid-template-columns: 1fr;
    }

    .oac-library-cta {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
        padding: 2rem;
    }
}