/* 
 * Teacher Session Marketplace UI
 * Custom styles for the modern Card Grid 
 */

.dnd-teacher-open-classes {
    padding: 1rem 0;
}

.dnd-teacher-open-classes h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
}

.dnd-marketplace-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #edf2f7;
    padding-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.dnd-marketplace-filters {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.dnd-marketplace-filter-select {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid #cbd5e0;
    background-color: white;
    font-size: 0.9rem;
    color: #4a5568;
    min-width: 180px;
}

.dnd-marketplace-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    align-items: stretch;
}

.dnd-marketplace-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border: 1px solid #edf2f7;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    overflow: hidden;
}

.dnd-marketplace-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.dnd-marketplace-card-header {
    background: linear-gradient(135deg, #f0f4ff 0%, #e0e7ff 100%);
    padding: 1.25rem;
    border-bottom: 1px solid #edf2f7;
}

.dnd-marketplace-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #2d3748;
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.dnd-marketplace-badge-type {
    display: inline-block;
    background: #4c51bf;
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.dnd-marketplace-card-body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.dnd-marketplace-info-row {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.dnd-marketplace-info-icon {
    font-size: 1.25rem;
    color: #a0aec0;
    line-height: 1;
    margin-top: 0.125rem;
}

.dnd-marketplace-info-content {
    flex: 1;
}

.dnd-marketplace-info-label {
    display: block;
    font-size: 0.75rem;
    color: #718096;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.dnd-marketplace-info-value {
    font-size: 0.95rem;
    color: #2d3748;
    font-weight: 500;
}

.dnd-marketplace-info-value.time-highlight {
    color: #dd6b20;
    font-weight: 700;
    font-size: 1.05rem;
}

.dnd-marketplace-card-footer {
    padding: 1rem;
    background: #f7fafc;
    border-top: 1px solid #edf2f7;
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Action Groups */
.dnd-action-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.dnd-action-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: #718096;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.125rem;
}

.dnd-marketplace-card .dnd-receive-class-btn,
.dnd-marketplace-card .marketplace-release-btn,
.dnd-marketplace-card .dnd-btn-toggle-availability {
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

/* Assigned Button (CLAIM) */
.dnd-marketplace-card .dnd-receive-class-btn {
    background-color: #3182ce;
    color: white;
}

.dnd-marketplace-card .dnd-receive-class-btn:hover {
    background-color: #2b6cb0;
}

/* Release Button */
.dnd-marketplace-card .marketplace-release-btn {
    background-color: #e53e3e;
    color: white;
}

.dnd-marketplace-card .marketplace-release-btn:hover {
    background-color: #c53030;
}

/* Availability Button (REGISTER) */
.dnd-marketplace-card .dnd-btn-toggle-availability {
    background-color: white;
    color: #2b6cb0;
    border: 1px solid #bee3f8;
}

.dnd-marketplace-card .dnd-btn-toggle-availability:hover {
    background-color: #ebf8ff;
    border-color: #90cdf4;
}

.dnd-marketplace-card .dnd-btn-toggle-availability.is-registered {
    background-color: #f0fff4;
    color: #2f855a;
    border-color: #c6f6d5;
}

.dnd-marketplace-card .dnd-btn-toggle-availability.is-registered:hover {
    background-color: #c6f6d5;
}

.dnd-status-assigned-badge {
    display: block;
    width: 100%;
    text-align: center;
    padding: 0.6rem 0.75rem;
    background-color: #e2e8f0;
    color: #4a5568;
    font-weight: 600;
    border-radius: 6px;
    font-size: 0.85rem;
}

/* Empty State */
.dnd-marketplace-empty {
    text-align: center;
    padding: 3rem 1rem;
    background: #f7fafc;
    border-radius: 12px;
    border: 1px dashed #cbd5e0;
    color: #718096;
}

.dnd-marketplace-empty svg {
    margin: 0 auto 1rem;
    color: #a0aec0;
}