/* ========================================
   COURSE CARD
   ======================================== */

.course-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 51, 102, 0.06);
    border: 1px solid rgba(51, 102, 153, 0.08);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    position: relative;
    display: block;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 51, 102, 0.12);
    text-decoration: none;
    color: inherit;
}

/* ========================================
   COURSE THUMBNAIL
   ======================================== */

.course-thumbnail {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-medium) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.course-thumbnail::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.course-thumbnail-content {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 1.5rem;
    text-align: center;
}

.course-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

/* ========================================
   COURSE BADGES
   ======================================== */

.course-badges {
    position: absolute;
    top: 1rem;
    left: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.course-badge {
    background: var(--accent-green);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-badge.new {
    background: #ff6b6b;
}

.is-published-false {
    background: #f59e0b;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========================================
   COURSE CONTENT
   ======================================== */

.course-content {
    padding: 2rem;
}

.course-header {
    margin-bottom: 1.5rem;
}

.course-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
}

/* ========================================
   INSTRUCTOR INFO
   ======================================== */

.course-instructor {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 0.75rem;
    background: #f8fafc;
    border-radius: 10px;
}

.instructor-info h6 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-dark);
}

/* ========================================
   COURSE META
   ======================================== */

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #f1f5f9;
}

.meta-left {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.course-price {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--accent-green);
}

.course-price.free {
    color: var(--accent-green);
}

/* ========================================
   EMPTY STATE
   ======================================== */

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    color: #cbd5e1;
    margin-bottom: 1.5rem;
}

.empty-state h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .course-content {
        padding: 1.5rem;
    }

    .course-thumbnail {
        height: 160px;
    }

    .course-icon {
        font-size: 2.5rem;
    }
}