/* 邀请模态框样式 */
#invitationModal .modal-content {
    max-width: min(900px, 90vw);
    max-height: 85vh;
    overflow: hidden;
    position: relative;
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.invitation-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.invitation-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.invitation-header h2 {
    margin: 0;
    color: var(--text-primary);
}

/* 简洁统计信息 */
.invitation-stats-simple {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem 2rem;
    margin-bottom: 2rem;
    padding: 1.2rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

@media (min-width: 768px) {
    .invitation-stats-simple {
        grid-template-columns: repeat(4, 1fr);
        gap: 1.2rem 2.5rem;
    }
}

.stat-item-simple {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.stat-label-simple {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.stat-value-simple {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* 优化关闭按钮样式 - 相对于 modal-header 定位 */
#invitationModal .modal-header {
    position: relative;
    flex-shrink: 0;
}

#invitationModal .modal-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.5rem 2rem;
}

/* 滚动条样式优化 */
#invitationModal .modal-body::-webkit-scrollbar {
    width: 8px;
}

#invitationModal .modal-body::-webkit-scrollbar-track {
    background: transparent;
}

#invitationModal .modal-body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    transition: background 0.3s ease;
}

#invitationModal .modal-body::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

#invitationModal .modal-close {
    position: absolute;
    top: 0;
    right: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    z-index: 10;
}

#invitationModal .modal-close:hover {
    background: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
    transform: scale(1.05);
}

/* 奖励信息 */
.reward-info {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.reward-info h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.reward-info h3 i {
    color: var(--primary-color);
}

.reward-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.reward-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.reward-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.reward-item-content {
    flex: 1;
}

.reward-item-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.reward-item-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* 操作按钮 */
.invitation-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.invitation-actions button {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

#generateInviteCodeBtn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white !important;
}

#generateInviteCodeBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.4);
}

#generateInviteCodeBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 邀请列表 */
.invitation-list-section {
    margin-top: 2rem;
}

.invitation-list-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.invitation-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.invitation-list::-webkit-scrollbar {
    width: 6px;
}

.invitation-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.invitation-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.invitation-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.invitation-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.invitation-code-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.invitation-code-badge i {
    color: var(--primary-color);
}

.invitation-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
}

.invitation-status.success {
    background: rgba(52, 199, 89, 0.2);
    border: 1px solid rgba(52, 199, 89, 0.3);
    color: #34c759;
}

.invitation-status.pending {
    background: rgba(255, 159, 10, 0.2);
    border: 1px solid rgba(255, 159, 10, 0.3);
    color: #ff9f0a;
}

.invitation-status.expired {
    background: rgba(255, 59, 48, 0.2);
    border: 1px solid rgba(255, 59, 48, 0.3);
    color: #ff3b30;
}

.invitation-item-body {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.invitation-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.invitation-info i {
    width: 20px;
    text-align: center;
    color: var(--primary-color);
}

.invitation-info.reward {
    color: #fbbf24;
    font-weight: 600;
}

.btn-copy-link {
    margin-top: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-copy-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.invitation-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
    text-align: center;
}

.invitation-empty i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.invitation-empty p {
    font-size: 1.1rem;
    margin: 0 0 0.5rem 0;
}

.invitation-empty small {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 响应式 */
@media (max-width: 768px) {
    #invitationModal .modal-content {
        max-width: 95vw;
        max-height: 90vh;
    }
    
    #invitationModal .modal-body {
        padding: 1rem;
    }
    
    .invitation-stats-simple {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        padding: 1rem;
    }

    .reward-grid {
        grid-template-columns: 1fr;
    }

    .invitation-actions {
        flex-direction: column;
    }
    
    .invitation-actions button {
        padding: 0.8rem;
        font-size: 0.9rem;
    }

    .invitation-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .invitation-list {
        max-height: 250px;
    }
    
    .invitation-header h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    #invitationModal .modal-content {
        width: 100vw;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
    }
    
    .invitation-stats-simple {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
    
    .stat-value-simple {
        font-size: 1rem;
    }
    
    .invitation-code-badge {
        font-size: 1rem;
        padding: 0.4rem 0.8rem;
    }
}