/* ============================================================
   marketplace.css — Unified Marketplace
   Extends flashcardmarket.css with course-specific additions.
   ============================================================ */

/* ── Category tabs ───────────────────────────────────────────── */
.marketplace-tabs .nav-pills {
    gap: 0.5rem;
}

.marketplace-tabs .nav-link {
    border-radius: 2rem;
    padding: 0.5rem 1.25rem;
    font-weight: 500;
    color: #495057;
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    transition: all 0.2s ease;
}

.marketplace-tabs .nav-link:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

.marketplace-tabs .nav-link.active {
    background: #0d6efd;
    border-color: #0d6efd;
    color: #fff;
}

.marketplace-tabs .nav-link .badge {
    background: rgba(255,255,255,0.25);
    color: inherit;
    font-size: 0.7rem;
}

.marketplace-tabs .nav-link.active .badge {
    background: rgba(255,255,255,0.35);
}

/* ── Course cards ────────────────────────────────────────────── */
.course-card {
    transition: all 0.3s ease;
    cursor: pointer;
    height: 100%;
    border: 1px solid #e9ecef;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    border-radius: 0.5rem;
    overflow: hidden;
}

.course-card:hover {
    transform: translateY(-6px) scale(1.015);
    box-shadow: 0 12px 24px rgba(25,135,84,0.15), 0 0 20px rgba(25,135,84,0.08);
    border-color: #198754;
}

.course-card .card-header {
    background: linear-gradient(135deg, #198754, #146c43);
    color: white;
    border-bottom: none;
    padding: 0.75rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-card:hover .card-header {
    background: linear-gradient(135deg, #146c43, #0f5132);
}

.course-card .card-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #212529;
    margin-bottom: 0.5rem;
}

.course-card:hover .course-title { color: #198754; }

.course-description {
    color: #6c757d;
    font-size: 0.875rem;
    line-height: 1.5;
    flex-grow: 1;
    margin-bottom: 0.75rem;
    /* Clamp to 3 lines */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card:hover .course-description { color: #495057; }

.course-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #6c757d;
    margin-top: auto;
    padding-top: 0.75rem;
    border-top: 1px solid #e9ecef;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.course-stats span {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    white-space: nowrap;
}

/* Difficulty badges */
.diff-beginner     { background: #d1e7dd; color: #0a3622; }
.diff-intermediate { background: #fff3cd; color: #664d03; }
.diff-advanced     { background: #f8d7da; color: #58151c; }

/* Price badge */
.price-badge {
    background: rgba(255,255,255,0.2);
    color: white;
    font-size: 0.8rem;
    padding: 0.2rem 0.6rem;
    border-radius: 1rem;
    border: 1px solid rgba(255,255,255,0.3);
    font-weight: 600;
}

/* Import button on card header */
.course-import-btn {
    border: 1px solid rgba(255,255,255,0.35);
    color: white;
    background: rgba(255,255,255,0.12);
    font-size: 0.8rem;
    padding: 0.2rem 0.65rem;
    border-radius: 0.4rem;
    transition: all 0.2s;
    white-space: nowrap;
}

.course-import-btn:hover {
    background: rgba(255,255,255,0.25);
    color: white;
    border-color: rgba(255,255,255,0.6);
}

/* ── Course detail modal ──────────────────────────────────────── */
.course-modal-header {
    background: linear-gradient(135deg, #198754, #146c43);
    color: white;
}

.course-modal-header .btn-close-white {
    filter: invert(1) grayscale(100%) brightness(200%);
}

.course-outline {
    border-radius: 0.5rem;
    overflow: hidden;
    border: 1px solid #e9ecef;
}

.course-outline-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.9rem;
    font-size: 0.875rem;
    border-bottom: 1px solid #f0f0f0;
    background: #fff;
}

.course-outline-item:last-child { border-bottom: none; }
.course-outline-item:nth-child(even) { background: #fafafa; }

.outline-title {
    color: #212529;
}

.outline-num {
    min-width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #e9ecef;
    color: #495057;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.outline-type-badge {
    font-size: 0.68rem;
    padding: 0.1rem 0.4rem;
    border-radius: 0.25rem;
    white-space: nowrap;
    margin-left: auto;
    flex-shrink: 0;
}

.type-lesson      { background: #cfe2ff; color: #052c65; }
.type-checkpoint  { background: #d1e7dd; color: #0a3622; }
.type-quiz        { background: #fff3cd; color: #664d03; }

/* ── Type label on cards ─────────────────────────────────────── */
.item-type-label {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.65rem;
    padding: 0.15rem 0.45rem;
    border-radius: 0.25rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.type-label-flashcard { background: #cfe2ff; color: #052c65; }
.type-label-course    { background: #d1e7dd; color: #0a3622; }

/* ── Section divider between flashcards/courses when all shown ── */
.category-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0 1rem;
    color: #6c757d;
    font-weight: 600;
    font-size: 0.9rem;
}

.category-divider::before,
.category-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #dee2e6;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
    .marketplace-tabs .nav-link {
        font-size: 0.85rem;
        padding: 0.4rem 0.9rem;
    }
    .course-card .card-header { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
    .course-stats { flex-direction: column; align-items: flex-start; }
}